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JP7228997B2 - steering device - Google Patents
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JP7228997B2 - steering device - Google Patents

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JP7228997B2
JP7228997B2 JP2018220795A JP2018220795A JP7228997B2 JP 7228997 B2 JP7228997 B2 JP 7228997B2 JP 2018220795 A JP2018220795 A JP 2018220795A JP 2018220795 A JP2018220795 A JP 2018220795A JP 7228997 B2 JP7228997 B2 JP 7228997B2
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steering shaft
rotation restricting
restricting member
axis
bush
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JP2020083076A (en
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和哉 寺島
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Astemo Ltd
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Hitachi Astemo Ltd
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  • Mounting Of Bearings Or Others (AREA)

Description

本発明は、ステアリング装置に関する。 The present invention relates to steering devices.

従来のステアリング装置としては、例えば以下の特許文献に記載されたものが知られている。 As conventional steering devices, for example, those described in the following patent documents are known.

すなわち、このステアリング装置では、操舵軸の外周側に、操舵軸の軸方向に平行な操舵軸摺動部と摺接可能な回転規制部材摺動部を有する回転規制部材を設けることにより、ボールねじの回転に伴う操舵軸の回転が規制されている。 That is, in this steering device, a rotation restricting member having a rotation restricting member sliding portion which is in slidable contact with the steering shaft sliding portion parallel to the axial direction of the steering shaft is provided on the outer peripheral side of the steering shaft. The rotation of the steering shaft accompanying the rotation of is restricted.

特開2012-066788号公報JP 2012-066788 A

しかしながら、前記従来のステアリング装置では、操舵軸の摺動によって、操舵軸摺動部及び回転規制部材摺動部に摩耗が生じた場合、操舵軸と回転規制部材とのクリアランスが増大してしまい、操舵軸の回転規制を適切に行えないおそれがあった。 However, in the above conventional steering device, when the steering shaft sliding portion and the rotation restricting member sliding portion wear due to the sliding of the steering shaft, the clearance between the steering shaft and the rotation restricting member increases. There was a possibility that the rotation control of the steering shaft could not be performed appropriately.

本発明は、かかる技術的課題に鑑みて案出されたものであり、操舵軸の回転を適切に規制することができるステアリング装置を提供するものである。 SUMMARY OF THE INVENTION The present invention has been devised in view of such technical problems, and provides a steering device capable of appropriately restricting the rotation of a steering shaft.

本発明は、その一態様として、回転規制部材摺動部を挟んで操舵軸の反対側に設けられた付勢部材によって、回転規制部材を操舵軸摺動部に向かって付勢する。 In one aspect of the present invention, the rotation restricting member is biased toward the steering shaft sliding portion by a biasing member provided on the opposite side of the steering shaft across the rotation restricting member sliding portion.

本発明によれば、操舵軸の回転を適切に規制することができる。 According to the present invention, it is possible to appropriately restrict the rotation of the steering shaft.

本発明に係るステアリング装置の外観斜視図である。1 is an external perspective view of a steering device according to the present invention; FIG. 図1のA-A線断面図である。FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; 図1のB-B線断面図BB line sectional view of FIG. 本発明の第1実施形態に係る図3のC-C線断面図である。FIG. 4 is a sectional view taken along line CC of FIG. 3 according to the first embodiment of the present invention; 図3に示すリテーナ単体を示す斜視図である。FIG. 4 is a perspective view showing a single retainer shown in FIG. 3; 図3に示すブッシュ単体を示す斜視図である。4 is a perspective view showing a single bush shown in FIG. 3; FIG. 本発明の第1実施形態の他例を示す図4相当図である。FIG. 5 is a view equivalent to FIG. 4 showing another example of the first embodiment of the present invention; 本発明の第2実施形態を示す図4相当図である。FIG. 5 is a view equivalent to FIG. 4 showing a second embodiment of the present invention; 本発明の第3実施形態を示す図4相当図である。It is a figure equivalent to Drawing 4 showing a 3rd embodiment of the present invention.

以下、本発明に係るステアリング装置の実施形態を、図面に基づき詳述する。そして、下記の実施形態では、このステアリング装置を、従来と同様、操舵軸がステアリングホイールに直接連結されない、いわゆるステア・バイ・ワイヤによって構成される自動車の前輪操舵装置に適用したものを示している。なお、本発明は、本実施形態で例示する前輪操舵装置の他にも、前記ステア・バイ・ワイヤと同様に、操舵軸がステアリングホイールに直接連結されない操舵装置、例えば後輪操舵装置に適用することも可能である。 An embodiment of a steering device according to the present invention will be described in detail below with reference to the drawings. In the following embodiments, this steering system is applied to a front wheel steering system for an automobile, which is configured by a so-called steer-by-wire system in which the steering shaft is not directly connected to the steering wheel, as in the conventional art. . In addition to the front wheel steering system exemplified in this embodiment, the present invention is also applicable to a steering system in which the steering shaft is not directly connected to the steering wheel, for example, a rear wheel steering system, like the steer-by-wire system. is also possible.

(ステアリング装置の構成)
図1は、本実施形態に係るステアリング装置の外観を表した、ステアリング装置の正面図を示している。なお、本図の説明では、操舵軸2の長手方向と平行な軸線に対し直角な断面において操舵軸2の中心を通り、かつ操舵軸2の長手方向と平行な軸線である、いわゆる操舵軸2の中心軸線を「第1軸線X」とし、該第1軸線Xに関する径方向に延びる軸線を「第2軸線Y」とする。
(Structure of steering device)
FIG. 1 shows a front view of a steering device showing the appearance of the steering device according to this embodiment. In the description of this figure, the so-called steering shaft 2 is an axis that passes through the center of the steering shaft 2 and is parallel to the longitudinal direction of the steering shaft 2 in a cross section perpendicular to the axis parallel to the longitudinal direction of the steering shaft 2. Let the central axis of , the "first axis X", and the axis extending radially with respect to the first axis X, the "second axis Y".

図1に示すように、ステアリング装置は、操舵軸ハウジング1の内部に第1軸線Xの方向に沿って移動可能に収容された操舵軸2と、操舵軸2に対し第1軸線Xの方向の移動力に相当する操舵力を付与するアクチュエータ3と、アクチュエータ3の動力を操舵軸2に伝達する伝達機構4と、を備える。すなわち、運転者の操舵操作に基づいてアクチュエータ3が駆動制御され、このアクチュエータ3の動力が伝達機構4を介して操舵軸2に伝達されることで、操舵軸2に連係される図示外の転舵輪の向きが変更される。また、ステアリング装置は、操舵軸2を収容する操舵軸ハウジング1に付設された1対のブラケットBKTを介して図示外の自動車の車体に懸架される。 As shown in FIG. 1, the steering apparatus includes a steering shaft 2 housed inside a steering shaft housing 1 so as to be movable along the direction of the first axis X, and An actuator 3 that applies a steering force corresponding to a moving force and a transmission mechanism 4 that transmits the power of the actuator 3 to the steering shaft 2 are provided. That is, the actuator 3 is driven and controlled based on the driver's steering operation, and the power of the actuator 3 is transmitted to the steering shaft 2 via the transmission mechanism 4 , thereby causing a rotation (not shown) linked to the steering shaft 2 . The direction of the steering wheel is changed. The steering device is suspended from the vehicle body (not shown) via a pair of brackets BKT attached to a steering shaft housing 1 that accommodates the steering shaft 2 .

操舵軸2は、棒状を呈し、第1軸線Xの方向の両端部が、タイロッド61及び図示外のナックルアームを介して、図示外の転舵輪に連係される。すなわち、操舵軸2が第1軸線Xの方向へと移動して、タイロッド61を介して図示外のナックルアームが押し引きされることによって、図示外の転舵輪の向きが変更される。また、操舵軸2とタイロッド61の間には、両者を接続する図示外のジョイントを覆うゴム製のブーツ部材62が取り付けられていて、このブーツ部材62により、前記ジョイントが水や粉塵から保護されている。ブーツ部材62,62は、操舵軸2の第1軸線Xの方向の移動に伴い伸縮可能な蛇腹筒状を呈し、一端部が操舵軸ハウジング1に固定され、他端部がタイロッド61に固定されることによって、前記ジョイントを包囲している。 The steering shaft 2 has a rod shape, and both ends in the direction of the first axis X are linked to steerable wheels (not shown) via tie rods 61 and knuckle arms (not shown). That is, the steering shaft 2 moves in the direction of the first axis X, and the knuckle arm (not shown) is pushed or pulled via the tie rod 61, thereby changing the direction of the steerable wheel (not shown). A rubber boot member 62 is attached between the steering shaft 2 and the tie rod 61 to cover a joint (not shown) connecting the two. The boot member 62 protects the joint from water and dust. ing. The boot members 62 , 62 have a bellows tube shape that can be expanded and contracted along with the movement of the steering shaft 2 in the direction of the first axis X, one end of which is fixed to the steering shaft housing 1 and the other end of which is fixed to the tie rod 61 . surrounding the joint.

アクチュエータ3は、例えば電動モータであって、操舵軸2を移動させる動力を生成する。すなわち、このアクチュエータ3により生成された動力(回転力)が、アクチュエータ3の第1軸線Xの方向の一端部に接続される伝達機構4を介して、操舵軸2の第1軸線Xの方向の移動力に変換される。また、アクチュエータ3の第1軸線Xの方向の他端部には、アクチュエータ3を構成する電動モータを駆動制御する電子コントローラ(ECU)である制御装置5が付設されている。すなわち、アクチュエータ3と制御装置5とが、いわゆる機電一体に構成され、制御装置5に入力される図示外の舵角センサやトルクセンサなど各種センサの検出結果に基づいて、アクチュエータ3が駆動制御される。 The actuator 3 is, for example, an electric motor, and generates power for moving the steering shaft 2 . That is, the power (rotational force) generated by the actuator 3 is transmitted in the direction of the first axis X of the steering shaft 2 via the transmission mechanism 4 connected to one end of the actuator 3 in the direction of the first axis X. converted to movement force. At the other end of the actuator 3 in the direction of the first axis X, a control device 5 which is an electronic controller (ECU) for driving and controlling the electric motor constituting the actuator 3 is attached. That is, the actuator 3 and the control device 5 are configured in a so-called electromechanical integration, and the actuator 3 is driven and controlled based on the detection results of various sensors such as a steering angle sensor and a torque sensor (not shown) that are input to the control device 5. be.

伝達機構4は、アクチュエータ3を構成する電動モータの回転力を伝達するベルト駆動機構41と、該ベルト駆動機構41により伝達された電動モータの回転を減速しつつ、この回転を第1軸線Xの方向の移動力へと変換するボールねじ機構42と、を有する。このベルト駆動機構41とボールねじ機構42は、内部において操舵軸収容部13と繋がるように操舵軸ハウジング1の外周側に第2軸線Yの方向に膨出形成された駆動機構収容部14の内部に収容される。 The transmission mechanism 4 includes a belt drive mechanism 41 that transmits the torque of the electric motor that constitutes the actuator 3, and a belt drive mechanism 41 that decelerates the rotation of the electric motor transmitted by the belt drive mechanism 41 and transmits the rotation along the first axis X. and a ball screw mechanism 42 that translates into directional movement force. The belt drive mechanism 41 and the ball screw mechanism 42 are located inside a drive mechanism accommodating portion 14 formed to bulge in the direction of the second axis Y on the outer peripheral side of the steering shaft housing 1 so as to be connected to the steering shaft accommodating portion 13 inside. are housed in

図2は、図1のA-A線に沿って切断した断面図を示している。なお、本図の説明では、操舵軸2の長手方向と平行な軸線に対し直角な断面において操舵軸2の中心を通り、かつ操舵軸2の長手方向と平行な軸線である、いわゆる操舵軸2の中心軸線を「第1軸線X」とし、該第1軸線Xに関する径方向に延びる軸線を「第2軸線Y」とする。 FIG. 2 shows a cross-sectional view taken along line AA of FIG. In the description of this figure, the so-called steering shaft 2 is an axis that passes through the center of the steering shaft 2 and is parallel to the longitudinal direction of the steering shaft 2 in a cross section perpendicular to the axis parallel to the longitudinal direction of the steering shaft 2. Let the central axis of , the "first axis X", and the axis extending radially with respect to the first axis X, the "second axis Y".

図2に示すように、操舵軸2は、操舵軸ハウジング1のうち概ね筒状をなす操舵軸ハウジング本体部10の内側に貫通形成された空間である操舵軸収容部13内に、両端部が外部に露出した状態で第1軸線Xの方向へ移動可能に収容されている。操舵軸ハウジング1は、アルミニウム合金材料を鋳造することによって第1軸線Xの方向に2分割に形成され、操舵軸2の第1軸線Xの方向の一端側を収容する第1ハウジング11と、操舵軸2の第1軸線Xの方向の他端側を収容する第2ハウジング12と、で構成される。この第1ハウジング11と第2ハウジング12は、複数のボルト60によって締結されている。 As shown in FIG. 2, both ends of the steering shaft 2 are placed in a steering shaft accommodating portion 13 which is a space penetrating the steering shaft housing main body portion 10 of the steering shaft housing 1 and formed substantially cylindrical. It is housed so as to be movable in the direction of the first axis X while being exposed to the outside. The steering shaft housing 1 is formed into two parts in the direction of the first axis X by casting an aluminum alloy material. and a second housing 12 that houses the other end side of the shaft 2 in the direction of the first axis X. The first housing 11 and the second housing 12 are fastened with a plurality of bolts 60 .

ベルト駆動機構41は、アクチュエータ3に連係されたモータ側プーリ43と、操舵軸2に連係されたナット側プーリ44と、該両プーリ43,44間に巻き掛けられた動力伝達部材としてのベルト部材45と、を備える。モータ側プーリ43は、アクチュエータ3を構成する電動モータの出力軸(図示外)の外周側に固定され、該電動モータの出力軸と一体に回転する。ナット側プーリ44は、ボールねじ機構42を構成する後述のナット46の外周側に固定され、該ナット46と一体に回転する。ベルト部材45は、内部にナイロン繊維や鋼線等が芯材として埋設されてなる無端状の伝動ベルトであり、モータ側プーリ43とナット側プーリ44との間に巻き掛けられて、モータ側プーリ43の回転をナット側プーリ44に伝達する。 The belt drive mechanism 41 includes a motor-side pulley 43 linked to the actuator 3, a nut-side pulley 44 linked to the steering shaft 2, and a belt member as a power transmission member wound between the pulleys 43 and 44. 45 and. The motor-side pulley 43 is fixed to the outer peripheral side of the output shaft (not shown) of the electric motor that constitutes the actuator 3, and rotates integrally with the output shaft of the electric motor. The nut-side pulley 44 is fixed to the outer peripheral side of a later-described nut 46 that constitutes the ball screw mechanism 42 and rotates integrally with the nut 46 . The belt member 45 is an endless transmission belt in which nylon fibers, steel wires, etc. are embedded as a core material. 43 is transmitted to the nut-side pulley 44 .

ボールねじ機構42は、操舵軸2の外周側に配置された筒状のナット46と、ナット46と操舵軸2との間に形成されたボール循環溝47と、ボール循環溝47内に転動可能に設けられた転動体としての複数のボール48と、を備える。この際、各ボール48は、それぞれボール循環溝47の両端を繋ぐチューブ49を介してボール循環溝47内を循環する。ここで、ボール循環溝47は、操舵軸2の外周側に設けられた螺旋状の溝形状を有する軸側ボールねじ溝471と、ナット46の内周側に設けられた螺旋状の溝形状を有するナット側ボールねじ溝472と、から構成される。 The ball screw mechanism 42 includes a cylindrical nut 46 arranged on the outer peripheral side of the steering shaft 2 , a ball circulation groove 47 formed between the nut 46 and the steering shaft 2 , and rolling in the ball circulation groove 47 . and a plurality of balls 48 as rolling elements that may be provided. At this time, each ball 48 circulates in the ball circulation groove 47 via a tube 49 connecting both ends of the ball circulation groove 47 . Here, the ball circulation groove 47 consists of a shaft-side ball screw groove 471 having a spiral groove shape provided on the outer peripheral side of the steering shaft 2 and a spiral groove shape provided on the inner peripheral side of the nut 46. and a nut-side ball screw groove 472 having.

ナット46は、駆動機構収容部14内に収容されるボールベアリング63を介して回転可能に支持されている。ボールベアリング63は、固定部材としての周知のロックナット64によって、駆動機構収容部14に固定されている。具体的には、ボールベアリング63は、ロックナット64により駆動機構収容部14に固定されるアウタレース部631と、アウタレース部631の内周側に対向して配置され、ナット46と一体に形成されたインナレース部632と、アウタレース部631とインナレース部632との間に転動可能に収容された複数のボール633と、で構成される。なお、本実施形態では、インナレース部632をナット46と一体に形成したものを例示しているが、インナレース部632は、ナット46と一体に形成されたものに限られない。換言すれば、インナレース部632は、ナット46と別体に形成されたものをナット46に固定したものであってもよい。 The nut 46 is rotatably supported via a ball bearing 63 housed within the drive mechanism housing portion 14 . The ball bearing 63 is fixed to the drive mechanism accommodating portion 14 by a well-known lock nut 64 as a fixing member. Specifically, the ball bearing 63 is arranged to face an outer race portion 631 fixed to the drive mechanism accommodating portion 14 by the lock nut 64 and the inner peripheral side of the outer race portion 631, and is formed integrally with the nut 46. It is composed of an inner race portion 632 and a plurality of balls 633 rotatably accommodated between the outer race portion 631 and the inner race portion 632 . Although the inner race portion 632 is formed integrally with the nut 46 in this embodiment, the inner race portion 632 is not limited to being formed integrally with the nut 46 . In other words, the inner race portion 632 may be formed separately from the nut 46 and fixed to the nut 46 .

図3は、図1のB-B線に沿って切断した、ステアリング装置の縦断面図を示しており、図4は、図3のC-C線に沿って切断した、ステアリング装置の横断面図を示している。また、図5は、回転規制部材71を回転規制部材第1端部71a側から見た回転規制部材71の斜視図を示し、図6は、ブッシュ76をブッシュ第1端部76aの外周側から見たブッシュ76の斜視図を示している。なお、各図の説明では、操舵軸2の長手方向と平行な軸線に対し直角な断面において操舵軸2の中心を通り、かつ操舵軸2の長手方向と平行な軸線である、いわゆる操舵軸2の中心軸線を「第1軸線X」とし、該第1軸線Xに関する径方向に延びる軸線を「第2軸線Y」とする。 3 shows a vertical cross section of the steering device cut along line BB of FIG. 1, and FIG. 4 shows a cross section of the steering device cut along line CC of FIG. Figure shows. 5 shows a perspective view of the rotation restricting member 71 viewed from the rotation restricting member first end portion 71a side, and FIG. FIG. 11 shows a perspective view of bushing 76 viewed. In the description of each figure, the so-called steering shaft 2 is an axis that passes through the center of the steering shaft 2 and is parallel to the longitudinal direction of the steering shaft 2 in a cross section perpendicular to the axis parallel to the longitudinal direction of the steering shaft 2. Let the central axis of , the "first axis X", and the axis extending radially with respect to the first axis X, the "second axis Y".

図3、図4に示すように、本実施形態に係るステアリング装置は、操舵軸2の回転を規制する回転規制機構7を備える。この回転規制機構7は、操舵軸2に対し第2軸線Yの方向から接触して操舵軸2の第1軸線Xに関する所定角度以上の回転運動を規制する回転規制部材71と、回転規制部材71を操舵軸2に向けて付勢する付勢部材72と、付勢部材72の付勢力を調整する調整部材73と、調整部材73を固定(ロック)する固定部材74と、を備える。 As shown in FIGS. 3 and 4 , the steering device according to this embodiment includes a rotation restricting mechanism 7 that restricts rotation of the steering shaft 2 . The rotation restricting mechanism 7 includes a rotation restricting member 71 which contacts the steering shaft 2 from the direction of the second axis Y and restricts the rotational movement of the steering shaft 2 about the first axis X of a predetermined angle or more. toward the steering shaft 2 , an adjusting member 73 for adjusting the biasing force of the biasing member 72 , and a fixing member 74 for fixing (locking) the adjusting member 73 .

操舵軸ハウジング1の操舵軸ハウジング本体部10には、内部において操舵軸収容部13と繋がるように、該操舵軸収容部13に開口形成された回転規制部材収容部15が、第2軸線Yの方向に沿って形成されている。この回転規制部材収容部15は、操舵軸ハウジング本体部10において、第2軸線Yの方向に沿って第1軸線Xに関する径方向の外側に向かって円筒状に膨出形成され、一端部が操舵軸収容部13に開口され、他端部が外部に開口されている。また、回転規制部材収容部15は、第2軸線Yの方向に沿ってほぼ一定の内径を有し、第2軸線Yの方向における操舵軸収容部13と反対側の内周面には、調整部材73のねじ込みに供する雌ねじ部151が形成されている。 The steering shaft housing main body portion 10 of the steering shaft housing 1 has a rotation restricting member accommodating portion 15 formed in an opening in the steering shaft accommodating portion 13 so as to be connected to the steering shaft accommodating portion 13 inside thereof. formed along the direction The rotation restricting member accommodating portion 15 is formed in the steering shaft housing main body portion 10 so as to bulge out in a cylindrical shape along the direction of the second axis Y and radially outward with respect to the first axis X. An opening is provided in the shaft accommodating portion 13, and the other end is opened to the outside. In addition, the rotation restricting member accommodating portion 15 has a substantially constant inner diameter along the direction of the second axis Y, and the inner peripheral surface on the side opposite to the steering shaft accommodating portion 13 in the direction of the second axis Y has an adjustment A female threaded portion 151 for screwing the member 73 is formed.

操舵軸2は、特に図4に示すように、棒状に形成された操舵軸本体部20の外周側に形成された1対の平面部であって、操舵時において回転規制部材71に対して摺動する操舵軸摺動部21,22が形成されている。すなわち、この操舵軸摺動部21,22は、操舵軸本体部20において、第1軸線Xの方向の全域にわたって延在し、操舵時における第1軸線Xの方向の移動に伴い、回転規制部材71の後述する回転規制部材摺動部711,712に対して摺動する。 As shown in FIG. 4, the steering shaft 2 is a pair of flat portions formed on the outer peripheral side of a steering shaft main body 20 formed in a bar shape, and slides on the rotation restricting member 71 during steering. Steering shaft sliding portions 21 and 22 that move are formed. That is, the steering shaft sliding portions 21 and 22 extend over the entire area of the steering shaft body portion 20 in the direction of the first axis X, and move along the direction of the first axis X during steering. It slides against rotation restricting member sliding portions 711 and 712 of 71 which will be described later.

回転規制部材71は、図3~図5に示すように、例えばアルミニウム合金等の金属材料からなる回転規制部材本体部710と、回転規制部材本体部710よりも摩擦抵抗の小さい材料(例えばPTFE(ポリテトラフルオロエチレン))からなる摺動部材75と、を有する。すなわち、回転規制部材71は、回転規制部材本体部710のうち、操舵軸摺動部21,22と対向する回転規制部材第1端部71aに、回転規制部材本体部710とは別体に形成された摺動部材75が取り付けられることによって、一体に形成されている。 As shown in FIGS. 3 to 5, the rotation restricting member 71 is composed of a rotation restricting member main body 710 made of a metal material such as an aluminum alloy and a material having a smaller frictional resistance than the rotation restricting member main body 710 (for example, PTFE ( and a sliding member 75 made of polytetrafluoroethylene). That is, the rotation restricting member 71 is formed separately from the rotation restricting member main body 710 at the rotation restricting member first end 71 a facing the steering shaft sliding portions 21 and 22 in the rotation restricting member main body 710 . It is integrally formed by attaching the sliding member 75 that has been formed.

回転規制部材本体部710は、操舵軸摺動部21,22と対向する回転規制部材第1端部71a側に、操舵軸摺動部21,22と対向する1対の突出部である回転規制部材第1突出部713と回転規制部材第2突出部714が、第1、第2軸線X,Yを挟んで相互に対向するように設けられている。換言すれば、回転規制部材第1端部71aには、回転規制部材第1突出部713と回転規制部材第2突出部714との間に、第1軸線Xの方向に沿って凹溝状に切り欠かれてなる操舵軸受容部715が形成されている。そして、かかる回転規制部材本体部710には、回転規制部材第1端部71aの外面を覆うように、操舵軸受容部715に嵌め込むかたちで、摺動部材75が被せられる。 The rotation restricting member main body portion 710 has a rotation restricting member, which is a pair of protrusions facing the steering shaft sliding portions 21 and 22, on the side of the rotation restricting member first end portion 71a facing the steering shaft sliding portions 21 and 22. A member first projecting portion 713 and a rotation restricting member second projecting portion 714 are provided so as to face each other with the first and second axes X and Y interposed therebetween. In other words, the rotation restricting member first end portion 71a has a concave groove along the direction of the first axis X between the rotation restricting member first protrusion 713 and the rotation restricting member second protrusion 714. A steering shaft receiving portion 715 is formed by notching. The rotation restricting member body portion 710 is covered with the sliding member 75 so as to be fitted into the steering shaft receiving portion 715 so as to cover the outer surface of the first end portion 71a of the rotation restricting member.

ここで、摺動部材75を被せた回転規制部材第1端部71aの外径D1は、図3、図4に示すように、第2軸線Yの方向において、回転規制部材第1端部71aと反対側の回転規制部材第2端部71bの外径D2とほぼ同じ大きさとなっている。すなわち、回転規制部材第1端部71aの外径D1は、摺動部材75の厚さの分だけ回転規制部材第2端部71bの外径D2よりも予め小さく設定されていて、摺動部材75を被せた状態で、回転規制部材第1端部71aの外径D1と回転規制部材第2端部71bの外径D2がほぼ同じ大きさとなるように構成されている。 Here, as shown in FIGS. 3 and 4, the outer diameter D1 of the rotation restricting member first end portion 71a covered with the sliding member 75 is the same as that of the rotation restricting member first end portion 71a in the direction of the second axis Y. It has substantially the same size as the outer diameter D2 of the rotation restricting member second end portion 71b on the opposite side. That is, the outer diameter D1 of the rotation restricting member first end portion 71a is set smaller than the outer diameter D2 of the rotation restricting member second end portion 71b by the thickness of the sliding member 75 in advance. The outer diameter D1 of the first end portion 71a of the rotation restricting member and the outer diameter D2 of the second end portion 71b of the rotation restricting member are configured to be substantially the same in the state where the outer diameter 75 is covered.

回転規制部材第1突出部713は、回転規制部材第1端部71aにおいて、第1軸線Xに関する周方向の一方に設けられ、外側に摺動部材75が被せられることで一方の操舵軸摺動部(操舵軸摺動部21)と当接可能な回転規制部材摺動部として機能する回転規制部材第1平面部716を有する。同様に、回転規制部材第2突出部714は、回転規制部材第1端部71aにおいて、第1軸線Xに関する周方向の他方に設けられ、外側に摺動部材75が被せられることで他方の操舵軸摺動部(操舵軸摺動部22)と当接可能な回転規制部材摺動部として機能する回転規制部材第2平面部717を有する。これら回転規制部材第1平面部716と回転規制部材第2平面部717は、それぞれ第1軸線Xの方向に沿って延びる平面形状を有し、回転規制部材本体部710の内周側に向かって両者の間隔が徐々に縮小する、ほぼV字状の傾斜面を構成する。 The rotation restricting member first projecting portion 713 is provided on one side of the rotation restricting member first end portion 71a in the circumferential direction with respect to the first axis X, and is covered with the sliding member 75 on the outside so that one steering shaft slides. It has a rotation restricting member first flat portion 716 that functions as a rotation restricting member sliding portion that can come into contact with the portion (steering shaft sliding portion 21). Similarly, the rotation restricting member second projecting portion 714 is provided on the other side of the rotation restricting member first end portion 71a in the circumferential direction with respect to the first axis X, and is covered with the sliding member 75 on the outside so that the steering angle of the other portion is increased. It has a rotation restricting member second flat portion 717 that functions as a rotation restricting member sliding portion that can come into contact with the shaft sliding portion (steering shaft sliding portion 22). The rotation restricting member first planar portion 716 and the rotation restricting member second planar portion 717 each have a planar shape extending along the direction of the first axis X, and extend toward the inner peripheral side of the rotation restricting member main body portion 710 . A substantially V-shaped inclined surface is formed in which the distance between the two gradually decreases.

また、回転規制部材第1突出部713と回転規制部材第2突出部714の間となる操舵軸受容部715の底部には、第2軸線Yに直角な平面を有し、摺動部材75を被せた状態で操舵軸2から離間するように回転規制部材第2端部71b側へ凹状にオフセットしてなる回転規制部材中間部718が形成される。回転規制部材中間部718は、平面視円形となる縦断面凹状に形成されていて、中央部には、回転規制部材本体部710を第2軸線Yの方向に沿って貫通する貫通孔718aが形成されている。貫通孔718aは、一定の内径を有する横断面円形の貫通孔であって、摺動部材75の後述する小径凸部752bの外径よりも僅かに小さい内径に設定されていて、この小径凸部752bによる後述のプレスフィット構造を構成可能となっている。 Further, the bottom portion of the steering shaft receiving portion 715 between the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 has a flat surface perpendicular to the second axis Y, and the sliding member 75 is placed thereon. A rotation restricting member intermediate portion 718 is formed so as to be recessed and offset toward the rotation restricting member second end portion 71b so as to be separated from the steering shaft 2 in the covered state. The rotation restricting member intermediate portion 718 is formed to have a concave vertical cross-section that is circular in plan view, and a through hole 718a that passes through the rotation restricting member main body portion 710 along the direction of the second axis Y is formed in the central portion. It is The through-hole 718a is a through-hole having a circular cross section with a constant inner diameter, and is set to have an inner diameter slightly smaller than the outer diameter of a small-diameter convex portion 752b of the sliding member 75, which will be described later. 752b can form a press-fit structure, which will be described later.

また、回転規制部材本体部710のうち回転規制部材第2端部71b側には、付勢部材第1端部72aを収容可能な凹状の付勢部材第1端部収容部719が、回転規制部材第1端部71a側へ窪むように形成されている。付勢部材第1端部収容部719は、付勢部材第1端部72aが着座する付勢部材第1端部着座部719aと、付勢部材第1端部着座部719aの内周側に設けられ、付勢部材第1端部着座部719aよりも回転規制部材第2端部71b側へ突出する回転規制部材ボス部719bと、を有する。すなわち、付勢部材第1端部収容部719では、付勢部材72は、付勢部材第1端部収容部719の内周面により外周側が支持され、かつ回転規制部材ボス部719bの外周面により内周側が支持されることによって、いわゆるセンタリングされた状態で、付勢部材第1端部着座部719aに着座する。 Further, on the side of the rotation restricting member second end portion 71b in the rotation restricting member main body portion 710, a concave biasing member first end accommodating portion 719 capable of accommodating the biasing member first end portion 72a is provided to restrict rotation. It is formed so as to be recessed toward the first end portion 71a of the member. The biasing member first end accommodating portion 719 includes a biasing member first end seating portion 719a on which the biasing member first end portion 72a is seated, and an inner peripheral side of the biasing member first end seating portion 719a. and a rotation restricting member boss portion 719b protruding toward the rotation restricting member second end portion 71b side from the biasing member first end seating portion 719a. That is, in the biasing member first end accommodating portion 719, the biasing member 72 is supported on the outer peripheral side by the inner peripheral surface of the biasing member first end accommodating portion 719, and is supported by the outer peripheral surface of the rotation restricting member boss portion 719b. Since the inner peripheral side is supported by the urging member, the biasing member is seated on the first end seating portion 719a in a so-called centered state.

摺動部材75は、図3~図5に示すように、回転規制部材第1端部71aにおける回転規制部材本体部710の外面の全体を被覆可能な有蓋円筒状に形成され、回転規制部材第1端部71aにおいて、回転規制部材本体部710に被せるように取り付けられる。具体的には、摺動部材75は、回転規制部材本体部710の外周を包囲する筒状包囲部751と、操舵軸2の操舵軸摺動部21,22に摺接可能な1対の平面部を構成する回転規制部材摺動部711,712と、回転規制部材本体部710との取付に供する摺動部材取付部752と、が前記PTFEによって一体に成形されている。 As shown in FIGS. 3 to 5, the sliding member 75 is formed in a lidded cylindrical shape capable of covering the entire outer surface of the rotation restricting member main body portion 710 at the rotation restricting member first end portion 71a. It is attached so as to cover the rotation restricting member body portion 710 at one end portion 71a. Specifically, the sliding member 75 includes a tubular surrounding portion 751 that surrounds the outer periphery of the rotation restricting member main body portion 710 and a pair of flat surfaces that can slidably contact the steering shaft sliding portions 21 and 22 of the steering shaft 2 . The rotation restricting member sliding portions 711 and 712 constituting the parts and the sliding member mounting portion 752 used for attachment to the rotation restricting member main body portion 710 are integrally formed of the PTFE.

筒状包囲部751は、回転規制部材第1端部71aにおいて、回転規制部材本体部710の外周面を包囲し、回転規制部材71の第2軸線Yの方向の移動に伴って回転規制部材収容部15の内面に摺接する。すなわち、回転規制部材第1端部71aの外周部が筒状包囲部751によって包囲され、回転規制部材71の第2軸線Yの方向の移動時に回転規制部材収容部15の内面に摺動部材75が摺接することで、第2軸線Yの方向における回転規制部材71の円滑な摺動が確保されている。 The cylindrical surrounding portion 751 surrounds the outer peripheral surface of the rotation restricting member main body portion 710 at the rotation restricting member first end portion 71a, and accommodates the rotation restricting member as the rotation restricting member 71 moves in the direction of the second axis Y. It slides on the inner surface of the portion 15 . That is, the outer peripheral portion of the first end portion 71a of the rotation restricting member is surrounded by the cylindrical enclosing portion 751, and the sliding member 75 slides against the inner surface of the rotation restricting member accommodating portion 15 when the rotation restricting member 71 moves in the direction of the second axis Y. The smooth sliding of the rotation restricting member 71 in the direction of the second axis Y is ensured by the sliding contact of the .

回転規制部材摺動部711,712は、図4、図5に示すように、それぞれ筒状包囲部751の内周側に連接されていて、操舵軸摺動部21,22に摺接可能な1対の平面部により構成され、第1軸線Xを挟んで対向するように設けられている。すなわち、回転規制部材摺動部711,712は、それぞれ第1軸線Xの方向に延びる、回転規制部材第1平面部716及び回転規制部材第2平面部717に対応する平面形状を有し、回転規制部材第1平面部716及び回転規制部材第2平面部717に被せられた状態で、操舵軸摺動部21,22に摺接可能となっている。 As shown in FIGS. 4 and 5, the rotation restricting member sliding portions 711 and 712 are connected to the inner peripheral side of the cylindrical enclosing portion 751, respectively, and are slidable on the steering shaft sliding portions 21 and 22. It is composed of a pair of plane portions and provided so as to face each other with the first axis X interposed therebetween. That is, the rotation restricting member sliding portions 711 and 712 have planar shapes corresponding to the rotation restricting member first planar portion 716 and the rotation restricting member second planar portion 717 extending in the direction of the first axis X, respectively. The steering shaft sliding portions 21 and 22 can be slidably contacted while being covered with the regulating member first flat portion 716 and the rotation regulating member second flat portion 717 .

摺動部材取付部752は、図4に示すように、回転規制部材摺動部711,712の内周側に連接されていて、回転規制部材第2端部71b側へ2段階に突出する凸部によって構成される。すなわち、摺動部材取付部752は、回転規制部材中間部718に嵌合可能な縦断面凹状部752aと、縦断面凹状部752aの中央部に突出形成され、回転規制部材本体部710の貫通孔718a内に嵌合可能な円柱状の小径凸部752bと、を有する。 As shown in FIG. 4, the sliding member mounting portion 752 is connected to the inner peripheral sides of the rotation restricting member sliding portions 711 and 712, and has a convex shape protruding in two stages toward the rotation restricting member second end portion 71b. It consists of the department. That is, the sliding member mounting portion 752 is formed so as to protrude from the central portion of the vertical section concave portion 752 a that can be fitted to the rotation restricting member intermediate portion 718 and the central portion of the vertical sectional concave portion 752 a . and a cylindrical small-diameter projection 752b that can be fitted into the projection 718a.

縦断面凹状部752aは、少なくとも操舵軸2が静止している状態において、操舵軸本体部20の外周面から離間し、操舵軸本体部20の外周面との間に所定のクリアランスが確保されるように、操舵軸本体部20に対してオフセットしている。なお、この縦断面凹状部752aは、必ずしも操舵軸本体部20の外周面から離間している必要はなく、操舵軸2が静止している状態から操舵軸本体部20の外周面に当接するような構成としてもよい。また、操舵軸2の静止状態では前述の離間状態が維持され、操舵軸2の移動時に操舵軸本体部20の外周面に当接するような構成としてもよい。小径凸部752bは、貫通孔718aに対して、いわゆるプレスフィット構造をもって嵌合可能に形成されたもので、小径凸部752bが貫通孔718a内に嵌合することによって、接着剤や締結部材など別途固定手段を用いることなく、摺動部材75が回転規制部材本体部710に取り付けられる。 The concave portion 752a in longitudinal section is separated from the outer peripheral surface of the steering shaft body portion 20 at least when the steering shaft 2 is stationary, and a predetermined clearance is ensured between the recessed portion 752a and the outer peripheral surface of the steering shaft body portion 20. , the steering shaft body 20 is offset. The recessed portion 752a in longitudinal section does not necessarily need to be spaced apart from the outer peripheral surface of the steering shaft body portion 20, and is arranged so as to contact the outer peripheral surface of the steering shaft body portion 20 when the steering shaft 2 is stationary. configuration. Alternatively, the steering shaft 2 may be configured to maintain the above-described separated state when the steering shaft 2 is stationary, and to come into contact with the outer peripheral surface of the steering shaft body 20 when the steering shaft 2 moves. The small-diameter convex portion 752b is formed so as to be able to fit into the through-hole 718a with a so-called press-fit structure. The sliding member 75 is attached to the rotation restricting member body portion 710 without using a separate fixing means.

付勢部材72は、図3、図4に示すように、周知のコイルスプリングであり、付勢部材第1端部72aが回転規制部材71の付勢部材第1端部収容部719内に収容されて、付勢部材第2端部72bが調整部材73の後述する付勢部材第2端部収容部731内に収容される。すなわち、付勢部材72は、回転規制部材71と調整部材73の間において、付勢部材第1端部収容部719と付勢部材第2端部収容部731の間に形成される付勢部材収容空間S内に、所定の予圧が付与された状態で装入されている。これにより、付勢部材72は、前記所定の予圧をもって、回転規制部材71を操舵軸2側へ向かって常時付勢している。換言すれば、この付勢部材72の予圧に基づく付勢力により、回転規制部材71が操舵軸2との摺動に伴って摩耗した場合であっても、回転規制部材71と操舵軸2の間のクリアランスを増大させることなく、回転規制部材71を操舵軸2に押し付けることが可能となっている。 The biasing member 72 is a well-known coil spring, as shown in FIGS. As a result, the biasing member second end portion 72b is housed in a biasing member second end housing portion 731 of the adjusting member 73, which will be described later. That is, the biasing member 72 is formed between the biasing member first end accommodating portion 719 and the biasing member second end accommodating portion 731 between the rotation restricting member 71 and the adjusting member 73 . The storage space S is loaded with a predetermined preload. As a result, the biasing member 72 constantly biases the rotation restricting member 71 toward the steering shaft 2 with the predetermined preload. In other words, due to the biasing force based on the preload of the biasing member 72 , even if the rotation restricting member 71 wears due to sliding on the steering shaft 2 , there is no force between the rotation restricting member 71 and the steering shaft 2 . The rotation restricting member 71 can be pressed against the steering shaft 2 without increasing the clearance.

調整部材73は、有底円筒状を呈し、付勢部材72と対向する調整部材第1端部73aの内周側に、付勢部材第2端部72bを収容可能な凹状の付勢部材第2端部収容部731が、回転規制部材第2端部71b側へ窪むように形成されている。付勢部材第2端部収容部731は、付勢部材第1端部収容部719と同様に、付勢部材第2端部72bが着座する付勢部材第2端部着座部731aと、付勢部材第2端部着座部731aの内周側に設けられ、付勢部材第2端部着座部731aよりも回転規制部材第1端部71a側へ突出する調整部材ボス部731bと、を有する。すなわち、付勢部材第2端部収容部731では、付勢部材72は、付勢部材第1端部収容部719の内周面により外周側が支持され、かつ調整部材ボス部731bの外周面により内周側が支持されることによって、いわゆるセンタリングされた状態で、付勢部材第2端部着座部731aに着座する。 The adjusting member 73 has a bottomed cylindrical shape, and has a concave biasing member second end 72b that can accommodate the biasing member second end 72b on the inner peripheral side of the adjusting member first end 73a facing the biasing member 72. The second end accommodating portion 731 is formed so as to be recessed toward the rotation restricting member second end portion 71b. Similar to the biasing member first end housing portion 719, the biasing member second end housing portion 731 includes a biasing member second end seating portion 731a on which the biasing member second end portion 72b is seated; and an adjusting member boss portion 731b provided on the inner peripheral side of the biasing member second end seating portion 731a and protruding toward the rotation restricting member first end portion 71a side beyond the biasing member second end seating portion 731a. . That is, in the biasing member second end accommodating portion 731, the biasing member 72 is supported on the outer peripheral side by the inner peripheral surface of the biasing member first end accommodating portion 719, and is supported by the outer peripheral surface of the adjustment member boss portion 731b. By supporting the inner peripheral side, it sits on the biasing member second end seating portion 731a in a so-called centered state.

また、調整部材73のうち、調整部材第1端部73aと反対側の調整部材第2端部73bの外周側には、回転規制部材収容部15の雌ねじ部151と噛み合う雄ねじ部732が形成されている。すなわち、調整部材73は、雄ねじ部732を回転規制部材収容部15の雌ねじ部151に噛み合わせた状態で、回転規制部材収容部15の開口端部からねじ込まれることで、回転規制部材収容部15に対して、第2軸線Yの方向に移動可能に設けられている。そして、調整部材73を第2軸線Yの方向に移動させることにより、付勢部材72が回転規制部材71に付与する付勢力(予圧)を調整することが可能となっている。なお、調整部材第2端部73bの端面には、調整部材73のねじ込みに際して例えば六角レンチなど図示外の工具を係合可能な、凹状の工具係合部733が設けられている。 A male threaded portion 732 that meshes with the female threaded portion 151 of the rotation restricting member accommodating portion 15 is formed on the outer peripheral side of the adjusting member second end portion 73b opposite to the adjusting member first end portion 73a. ing. That is, the adjusting member 73 is screwed from the opening end of the rotation restricting member accommodating portion 15 in a state where the male thread portion 732 is engaged with the female thread portion 151 of the rotation restricting member accommodating portion 15 . It is provided movably in the direction of the second axis Y with respect to. By moving the adjusting member 73 in the direction of the second axis Y, the biasing force (preload) applied by the biasing member 72 to the rotation restricting member 71 can be adjusted. The end surface of the adjusting member second end portion 73b is provided with a recessed tool engaging portion 733 that can engage a tool (not shown) such as a hexagonal wrench when screwing the adjusting member 73. As shown in FIG.

固定部材74は、周知のロックナットであって、内周側に、調整部材73の雄ねじ部732と噛み合う雌ねじ部741が形成されている。すなわち、固定部材74は、回転規制部材収容部15の開口端部において、回転規制部材収容部15から外部に露出する調整部材73の雄ねじ部732にねじ込まれ、回転規制部材収容部15の開口端部に締結されることで、調整部材73を任意の位置で固定する。 The fixing member 74 is a well-known lock nut, and has a female threaded portion 741 that engages with the male threaded portion 732 of the adjusting member 73 on its inner peripheral side. That is, the fixing member 74 is screwed into the male threaded portion 732 of the adjustment member 73 exposed to the outside from the rotation restricting member accommodating portion 15 at the open end portion of the rotation restricting member accommodating portion 15 , thereby The adjustment member 73 is fixed at an arbitrary position by being fastened to the portion.

また、図3、図4に示すように、操舵軸ハウジング1の操舵軸収容部13内には、第1軸線Xを挟んで回転規制部材71と反対側の位置に、操舵軸本体部20の外周面を摺動可能に支持するブッシュ76が配置されている。すなわち、ブッシュ76は、樹脂材料(例えばPTFE(ポリテトラフルオロエチレン))により一体に形成されたもので、第2軸線Yの方向において操舵軸2を挟んで回転規制部材71に対向して配置され、回転規制部材71によって付勢された操舵軸本体部20の外周面を摺動可能に支持する。具体的には、ブッシュ76は、図3、図4、図6に示すように、第1軸線Xの方向に沿って延びる第1、第2スリット765,766を介して第1軸線Xに関する周方向に3分割に形成されたブッシュ第1当接部761、ブッシュ第2当接部762及びブッシュ第3当接部763と、該ブッシュ第1~第3当接部761,762,763を一体に接続するブッシュ基部760と、を有する。 Further, as shown in FIGS. 3 and 4, the steering shaft body portion 20 is provided in the steering shaft accommodating portion 13 of the steering shaft housing 1 at a position opposite to the rotation restricting member 71 with respect to the first axis X. A bush 76 is arranged to slidably support the outer peripheral surface. That is, the bush 76 is integrally formed of a resin material (for example, PTFE (polytetrafluoroethylene)), and is arranged in the direction of the second axis Y so as to face the rotation restricting member 71 with the steering shaft 2 interposed therebetween. , slidably support the outer peripheral surface of the steering shaft body 20 biased by the rotation restricting member 71 . Specifically, as shown in FIGS. 3, 4, and 6, the bushing 76 has a circumference about the first axis X through first and second slits 765 and 766 extending along the direction of the first axis X. A bushing first contact portion 761, a bushing second contacting portion 762, and a bushing third contacting portion 763 which are divided into three in the direction, and the bushing first to third contacting portions 761, 762, and 763 are integrated. and a bushing base 760 that connects to the .

ブッシュ第1~第3当接部761,762,763は、それぞれ第1軸線Xの方向に沿って延びる第1当接部一般部761a、第2当接部一般部762a及び第3当接部一般部763aを有する。第1~第3当接部一般部761a,762a,763aは、ブッシュ基部760と共に、操舵軸ハウジング本体部10の内側に開口するように環状に窪み形成されたブッシュ収容溝16内に収容され、操舵軸本体部20の外周面に当接可能に配置されている。 The bushing first to third contact portions 761, 762, 763 each extend along the direction of the first axis X. It has a general part 763a. The first to third contact portion general portions 761a, 762a, 763a are housed together with the bush base portion 760 in the bush housing groove 16 which is annularly recessed and opened to the inside of the steering shaft housing body portion 10, It is arranged so as to be able to come into contact with the outer peripheral surface of the steering shaft body portion 20 .

また、特に図3に示すように、ブッシュ第1~第3当接部761,762,763のうちブッシュ第2当接部762は、第2軸線Yを通り、かつ第1軸線Xに対して直角な断面において、操舵軸2を挟んで回転規制部材71の反対側に配置される。そして、このブッシュ第2当接部762は、操舵軸ハウジング1に対し操舵軸2が静止している状態において、操舵軸2(操舵軸本体部20の外周面)に当接するように配置されている。他方、ブッシュ第1、第3当接部761,763は、操舵軸ハウジング1に対し操舵軸2が静止している状態において、操舵軸2(操舵軸本体部20の外周面)から離間するように配置されている。 3, among the bushing first to third contacting portions 761, 762, 763, the bushing second contacting portion 762 passes through the second axis Y and extends relative to the first axis X. It is arranged on the opposite side of the rotation restricting member 71 with the steering shaft 2 interposed therebetween in a perpendicular cross section. The bushing second contact portion 762 is arranged so as to contact the steering shaft 2 (the outer peripheral surface of the steering shaft main body portion 20) when the steering shaft 2 is stationary with respect to the steering shaft housing 1. there is On the other hand, when the steering shaft 2 is stationary with respect to the steering shaft housing 1, the bushing first and third contact portions 761 and 763 are separated from the steering shaft 2 (the outer peripheral surface of the steering shaft main body portion 20). are placed in

なお、本実施形態では、図3に示すように、操舵軸2が静止している状態において、ブッシュ第1、第3当接部761,763が操舵軸2から離間する構成を例示したが、かかる構成に限定されるものではない。換言すれば、例えば図7に示すように、操舵軸ハウジング1に対し操舵軸2が静止している状態において、ブッシュ第1~第3当接部761,762,763の全てが操舵軸2(操舵軸本体部20の外周面)に当接するように構成することも可能である。かかる構成の場合は、ブッシュ第2当接部762のみを操舵軸2に当接させる場合と比べて、操舵軸2のより安定した摺動(支持)を確保することができる。 In this embodiment, as shown in FIG. 3, the first and third bushing contact portions 761 and 763 are separated from the steering shaft 2 when the steering shaft 2 is stationary. It is not limited to such a configuration. In other words, for example, as shown in FIG. 7, when the steering shaft 2 is stationary with respect to the steering shaft housing 1, all of the bushing first to third contact portions 761, 762, 763 contact the steering shaft 2 ( It is also possible to configure it so as to abut on the outer peripheral surface of the steering shaft body portion 20 . In the case of such a configuration, it is possible to ensure more stable sliding (support) of the steering shaft 2 than in the case where only the bushing second contact portion 762 is brought into contact with the steering shaft 2 .

また、ブッシュ第1~第3当接部761,762,763には、図3、図4、図6に示すように、第1~第3当接部一般部761a,762a,763aの外周面に、第1軸線Xに関する径方向外側へ突出する鍔状の第1係止凸部761b、第2係止凸部762b及び第3係止凸部763bが、一体に形成されている。これら第1~第3係止凸部761b,762b,763bは、ブッシュ収容溝16において、操舵軸ハウジング本体部10の内側に開口するように、環状に窪み形成されたブッシュ係止溝17に、係止可能に嵌め込まれる。すなわち、第1~第3係止凸部761b,762b,763bがそれぞれブッシュ係止溝17内に嵌め込まれることにより、ブッシュ76の第1軸線Xの方向の移動が規制されている。 As shown in FIGS. 3, 4 and 6, the bushing first to third contact portions 761, 762 and 763 have outer peripheral surfaces of the first to third contact portion general portions 761a, 762a and 763a. In addition, a flange-shaped first locking projection 761b, second locking projection 762b, and third locking projection 763b projecting radially outward with respect to the first axis X are integrally formed. These first to third engaging projections 761b, 762b, 763b are formed in the bush engaging groove 17, which is recessed annularly in the bush accommodating groove 16 so as to open to the inside of the steering shaft housing main body 10. It is lockably fitted. That is, by fitting the first to third engaging projections 761b, 762b, and 763b into the bush engaging grooves 17 respectively, movement of the bush 76 in the direction of the first axis X is restricted.

また、ブッシュ第1~第3当接部761,762,763のうちブッシュ第2当接部762には、図4、図6に示すように、第2当接部一般部762aの外周面に、第2係止凸部762bに隣接するかたちで、第1軸線Xに関する径方向外側へ突出する回転規制凸部764が、一体に形成されている。この回転規制凸部764は、ブッシュ収容溝16において、操舵軸ハウジング本体部10の内側へ第1軸線Xに関する径方向内側に向かって開口するように凹状に窪み形成されたブッシュ回転規制溝18に、係止可能に嵌め込まれる。すなわち、回転規制凸部764が、ブッシュ回転規制溝18内に嵌め込まれることにより、ブッシュ76の第1軸線Xに関する周方向の移動が規制されている。 4 and 6, the bushing second contacting portion 762 of the bushing first to third contacting portions 761, 762, and 763 has a A rotation restricting protrusion 764 protruding radially outward with respect to the first axis X is integrally formed adjacent to the second locking protrusion 762b. The rotation restricting convex portion 764 is formed in the bush rotation restricting groove 18 which is recessed in the bush accommodating groove 16 so as to open radially inward with respect to the first axis X toward the inner side of the steering shaft housing main body 10 . , are lockably fitted. That is, the circumferential movement of the bush 76 about the first axis X is restricted by fitting the rotation restricting projection 764 into the bush rotation restricting groove 18 .

ブッシュ基部760は、円弧状(横断面C字状)に形成され、第1軸線Xに関する周方向にブッシュ第1~第3当接部761,762,763を接続しており、ブッシュ76の取付状態において、第1~第3当接部一般部761a,762a,763aと共にブッシュ収容溝16内に収容される。なお、ブッシュ基部760は、第1~第3当接部一般部761a,762a,763aよりも若干薄肉(2/3程度)となる一定の厚さ(第2軸線Y方向の幅)に設定されている。換言すれば、かかる比較的薄肉に形成されたブッシュ基部760により、このブッシュ基部760を支点としたブッシュ第1~第3当接部761,762,763の弾性変形が容易に構成されている。これにより、第1~第3係止凸部761b,762b,763bをブッシュ係止溝17に係止する際、ブッシュ第1~第3当接部761,762,763を内周側へ容易に収縮することが可能となり、操舵軸ハウジング1に対するブッシュ76の取付作業性が向上する。 The bushing base portion 760 is formed in an arc shape (having a C-shaped cross section), and connects the bushing first to third contact portions 761, 762, 763 in the circumferential direction about the first axis X. In this state, it is accommodated in the bush accommodation groove 16 together with the first to third contact general portions 761a, 762a, 763a. The bushing base portion 760 is set to have a constant thickness (width in the direction of the second axis Y) that is slightly thinner (about 2/3) than the first to third contact portion general portions 761a, 762a, and 763a. ing. In other words, the relatively thin bush base 760 facilitates elastic deformation of the bush first to third contact portions 761, 762, 763 with the bush base 760 as a fulcrum. As a result, when locking the first to third locking projections 761b, 762b, 763b in the bush locking groove 17, the bushing first to third contacting portions 761, 762, 763 can be easily moved inward. It becomes possible to contract, and the mounting workability of the bush 76 to the steering shaft housing 1 is improved.

(本実施形態の作用効果)
前記従来のステアリング装置では、操舵軸2が摺動することにより、操舵軸摺動部21,22と回転規制部材摺動部711,712と間に摩耗が発生する。すると、この摩耗によって、操舵軸2と回転規制部材71とのクリアランスが増大してしまう結果、操舵軸2と回転規制部材71との間に、いわゆるガタが生じ、このガタにより、操舵軸2の回転規制を適切に行えないおそれがあった。
(Action and effect of the present embodiment)
In the conventional steering device, the sliding of the steering shaft 2 causes wear between the steering shaft sliding portions 21 and 22 and the rotation restricting member sliding portions 711 and 712 . As a result of this wear, the clearance between the steering shaft 2 and the rotation restricting member 71 increases, resulting in so-called backlash between the steering shaft 2 and the rotation restricting member 71 . There was a possibility that the rotation control could not be performed appropriately.

また、前記従来のステアリング装置では、回転規制部材71に対し操舵軸2側から入力があった際には、回転規制部材71に対し操舵軸2が強く押圧され、操舵軸2と回転規制部材71との間に大きな摩擦力が発生し、操舵軸2の摺動抵抗の増大や、回転規制部材71の摩耗の増大を招来してしまうおそれもある。 Further, in the conventional steering device, when an input is applied to the rotation restricting member 71 from the side of the steering shaft 2, the steering shaft 2 is strongly pressed against the rotation restricting member 71, and the steering shaft 2 and the rotation restricting member 71 are pressed against each other. A large frictional force is generated between and, and there is also a possibility of causing an increase in sliding resistance of the steering shaft 2 and an increase in wear of the rotation restricting member 71 .

これに対し、本実施形態に係るステアリング装置では、以下の効果が奏せられることで、前記従来のステアリング装置の課題を解決することができる。 On the other hand, in the steering device according to the present embodiment, the problems of the conventional steering device can be solved by providing the following effects.

すなわち、本実施形態に係るステアリング装置は、操舵軸であって、操舵軸本体部20と、操舵軸摺動部21,22を含み、操舵軸本体部20は、棒形状を有し、操舵軸本体部20の長手方向に移動することで操舵輪(図示外)を転舵可能であり、操舵軸摺動部21,22は、操舵軸本体部20の外周側に設けられている、操舵軸2と、操舵軸ハウジングであって、操舵軸ハウジング本体部10と、操舵軸収容部13と、回転規制部材収容部15を含み、操舵軸ハウジング本体部10は、筒形状を有し、操舵軸収容部13は、操舵軸ハウジング本体部10の内側に形成された空間であって、操舵軸2の少なくとも一部を収容しており、操舵軸2の長手方向と平行な軸線に対し直角な断面において操舵軸2の中心を通り、かつ操舵軸2の長手方向と平行な軸線を第1軸線Xとしたとき、回転規制部材収容部15は、第1軸線Xに関する径方向に延びる軸線である第2軸線Yに沿って形成され、操舵軸収容部13と繋がっている、操舵軸ハウジング1と、アクチュエータであって、操舵軸2の長手方向において、操舵軸ハウジング1に対し操舵軸2を移動させる力を付与する、アクチュエータ3と、回転規制部材であって、回転規制部材収容部15に設けられ、回転規制部材本体部710と、回転規制部材摺動部711,712を含み、回転規制部材摺動部711,712は、回転規制部材本体部710のうち、第2軸線Yの方向における回転規制部材本体部710の1対の端部である回転規制部材第1端部71aと回転規制部材第2端部71bのうち、操舵軸2に近い回転規制部材第1端部71aに設けられ、回転規制部材摺動部711,712は、第1軸線Xの方向における操舵軸2の移動に伴い、操舵軸摺動部21,22に対し摺動可能であり、かつ、回転規制部材摺動部711,712は、操舵軸摺動部21,22と当接することにより、操舵軸2の第1軸線Xに関する所定角度以上の回転運動を規制可能である、回転規制部材71と、付勢部材であって、第2軸線Yの方向において、回転規制部材摺動部711,712を挟んで操舵軸2の反対側に設けられ、操舵軸摺動部21,22に向かって回転規制部材71を付勢する、付勢部材72と、を有する。 That is, the steering device according to the present embodiment is a steering shaft, and includes a steering shaft main body portion 20 and steering shaft sliding portions 21 and 22. The steering shaft main body portion 20 has a rod shape, and the steering shaft A steering wheel (not shown) can be steered by moving the body portion 20 in the longitudinal direction. 2, a steering shaft housing, which includes a steering shaft housing main body portion 10, a steering shaft housing portion 13, and a rotation restricting member housing portion 15. The steering shaft housing main body portion 10 has a cylindrical shape, The accommodating portion 13 is a space formed inside the steering shaft housing body portion 10 and accommodates at least a portion of the steering shaft 2 . , the axis line passing through the center of the steering shaft 2 and parallel to the longitudinal direction of the steering shaft 2 is defined as a first axis line X. A steering shaft housing 1 formed along two axes Y and connected to a steering shaft housing portion 13, and an actuator for moving the steering shaft 2 with respect to the steering shaft housing 1 in the longitudinal direction of the steering shaft 2. An actuator 3 that applies a force, a rotation restricting member, which is provided in the rotation restricting member housing portion 15 and includes a rotation restricting member main body portion 710 and rotation restricting member sliding portions 711 and 712 . The moving portions 711 and 712 are composed of a rotation restricting member first end portion 71a and a rotation restricting member second end portion 71a, which are a pair of ends of the rotation restricting member main body portion 710 in the direction of the second axis Y. Among the two end portions 71b, the rotation restricting member first end portion 71a, which is closer to the steering shaft 2, is provided with rotation restricting member sliding portions 711 and 712. As the steering shaft 2 moves in the direction of the first axis X, The rotation restricting member sliding portions 711 and 712 are slidable with respect to the steering shaft sliding portions 21 and 22, and are in contact with the steering shaft sliding portions 21 and 22 so that the first axis of the steering shaft 2 is aligned. A rotation restricting member 71 capable of restricting a rotational movement of a predetermined angle or more with respect to X, and an urging member, which is a steering shaft 2 in the direction of the second axis Y, with rotation restricting member sliding portions 711 and 712 interposed therebetween. and an urging member 72 provided on the opposite side of the steering shaft sliding portions 21 and 22 for urging the rotation restricting member 71 toward the steering shaft sliding portions 21 and 22 .

このように、本実施形態では、回転規制部材71が、付勢部材72によって操舵軸2側へ付勢されるように構成されている。このため、操舵軸2の摺動に基づく回転規制部材摺動部711,712の摩耗等によって、操舵軸2と回転規制部材71の間のクリアランスが変化してしまう場合でも、付勢部材72の付勢力により、操舵軸2と回転規制部材71の当接状態を維持することが可能となる。これにより、操舵軸2の回転を適切に規制することができる。 Thus, in this embodiment, the rotation restricting member 71 is configured to be biased toward the steering shaft 2 by the biasing member 72 . Therefore, even if the clearance between the steering shaft 2 and the rotation restricting member 71 changes due to abrasion of the rotation restricting member sliding portions 711 and 712 based on the sliding of the steering shaft 2, the biasing member 72 does not move. The biasing force makes it possible to maintain the contact state between the steering shaft 2 and the rotation restricting member 71 . As a result, the rotation of the steering shaft 2 can be appropriately restricted.

加えて、本実施形態では、回転規制部材71を操舵軸2側へ付勢することで、操舵軸2から回転規制部材71に入力があった場合でも、この入力を付勢部材72の付勢力(弾性)によって吸収することが可能となる。これにより、操舵軸2と回転規制部材71の摺動摩擦の増大が抑制され、操舵軸2の適切な回転規制を確保することができる。 In addition, in the present embodiment, by biasing the rotation restricting member 71 toward the steering shaft 2 side, even if there is an input to the rotation restricting member 71 from the steering shaft 2, the input is applied to the biasing force of the biasing member 72. (elasticity) makes it possible to absorb. As a result, an increase in sliding friction between the steering shaft 2 and the rotation restricting member 71 is suppressed, and appropriate rotation restriction of the steering shaft 2 can be ensured.

また、本実施形態に係るステアリング装置は、さらにブッシュ76を備え、ブッシュ76は、操舵軸収容部13に設けられ、操舵軸2の外周面と当接し、操舵軸2を支持可能となっている。 The steering device according to the present embodiment further includes a bush 76 , which is provided in the steering shaft housing portion 13 and contacts the outer peripheral surface of the steering shaft 2 to support the steering shaft 2 . .

このように、操舵軸収容部13に操舵軸2を支持するブッシュ76を設けることで、操舵軸2の移動時に、操舵軸ハウジング1に対し操舵軸2が直接摺動してしまうことを抑制することができる。これにより、操舵軸ハウジング1と操舵軸2の摺動抵抗の増大、及び摩耗の抑制を図ることができる。 By providing the bushing 76 for supporting the steering shaft 2 in the steering shaft accommodating portion 13 in this manner, direct sliding of the steering shaft 2 with respect to the steering shaft housing 1 is suppressed when the steering shaft 2 moves. be able to. As a result, the sliding resistance between the steering shaft housing 1 and the steering shaft 2 can be increased, and wear can be suppressed.

また、本実施形態では、ブッシュ76は、ブッシュ第1当接部761、ブッシュ第2当接部762、及びブッシュ第3当接部763を含み、ブッシュ第1当接部761、ブッシュ第2当接部762、及びブッシュ第3当接部763は、第1軸線Xに関する周方向において、ブッシュ第1当接部761、ブッシュ第2当接部762、ブッシュ第3当接部763の順に並んでおり、ブッシュ第2当接部762は、第2軸線Yを通り、かつ第1軸線Xに対して直角な断面において、操舵軸2を挟んで回転規制部材71の反対側に設けられており、ブッシュ第2当接部762は、操舵軸ハウジング1に対し操舵軸2が静止している状態において、操舵軸2と接触しており、ブッシュ第1当接部761及びブッシュ第3当接部763は、操舵軸ハウジング1に対し操舵軸2が静止している状態において、操舵軸2と離間している。 In this embodiment, the bush 76 includes a bush first contact portion 761, a bush second contact portion 762, and a bush third contact portion 763. The contact portion 762 and the third bush contact portion 763 are arranged in the order of the bush first contact portion 761, the bush second contact portion 762, and the bush third contact portion 763 in the circumferential direction about the first axis X. The bushing second contact portion 762 is provided on the opposite side of the rotation restricting member 71 across the steering shaft 2 in a cross section passing through the second axis Y and perpendicular to the first axis X, The bush second contact portion 762 is in contact with the steering shaft 2 when the steering shaft 2 is stationary with respect to the steering shaft housing 1, and the bush first contact portion 761 and the bush third contact portion 763 are in contact with each other. is separated from the steering shaft 2 when the steering shaft 2 is stationary with respect to the steering shaft housing 1 .

このように、本実施形態では、周方向に分割されたブッシュ第1~第3当接部761,762,763のうち、操舵軸2を挟んで回転規制部材71と対向するブッシュ第2当接部762のみを操舵軸2に当接させ、他のブッシュ第1、第3当接部761,763を操舵軸2から離間させている。これにより、ブッシュ第2当接部762を操舵軸2に確実に当接させ、回転規制部材71を付勢する付勢部材72の付勢力をブッシュ第2当接部762によって確実に受けることが可能となり、操舵軸2の良好な支持に供する。 As described above, in the present embodiment, among the bush first to third contact portions 761, 762, and 763 divided in the circumferential direction, the bush second contact portion facing the rotation restricting member 71 with the steering shaft 2 interposed therebetween is provided. Only the portion 762 is brought into contact with the steering shaft 2 , and the other bush first and third contact portions 761 and 763 are separated from the steering shaft 2 . As a result, the bushing second contact portion 762 can be reliably brought into contact with the steering shaft 2 , and the bushing second contact portion 762 can reliably receive the biasing force of the biasing member 72 that biases the rotation restricting member 71 . It is possible to support the steering shaft 2 satisfactorily.

また、本実施形態では、ブッシュ76は、さらにブッシュ基部760を含み、ブッシュ第1当接部761、ブッシュ第2当接部762、及びブッシュ第3当接部763は、ブッシュ基部760と繋がっている。 In this embodiment, the bushing 76 further includes a bushing base portion 760 , and the bushing first contact portion 761 , the bushing second contacting portion 762 , and the bushing third contacting portion 763 are connected to the bushing base portion 760 . there is

このように、本実施形態では、ブッシュ第1~第3当接部761,762,763のそれぞれがブッシュ基部760と繋がって、一体化されている。これにより、ブッシュ第1~第3当接部761,762,763の取り扱いが容易となり、ブッシュ76の組付作業性が良好となる。 Thus, in this embodiment, each of the bushing first to third contact portions 761, 762, 763 is connected to the bushing base portion 760 and integrated. As a result, the bushing first to third contact portions 761, 762, 763 can be easily handled, and the bushing 76 can be assembled with ease.

また、本実施形態では、操舵軸ハウジング1は、操舵軸ハウジング本体部10の内側に形成され、第1軸線Xに対し直角な断面において環状に形成されたブッシュ係止溝17を備え、ブッシュ第1当接部761、ブッシュ第2当接部762、及びブッシュ第3当接部763のそれぞれは、第1軸線Xに関する径方向の外側に突出する第1係止凸部761b、第2係止凸部762b、及び第3係止凸部763bをそれぞれ有し、第1係止凸部761b、第2係止凸部762b、及び第3係止凸部763bのそれぞれは、ブッシュ76が操舵軸ハウジング1に組み付けられた状態において、ブッシュ係止溝17に嵌まっている。 Further, in this embodiment, the steering shaft housing 1 is formed inside the steering shaft housing main body portion 10 and has a bush engaging groove 17 formed in an annular shape in a cross section perpendicular to the first axis X. The first contacting portion 761, the second bushing contacting portion 762, and the third bushing contacting portion 763 are formed by a first locking convex portion 761b and a second locking convex portion 761b projecting radially outward with respect to the first axis X, respectively. Each of the first locking projection 761b, the second locking projection 762b, and the third locking projection 763b has a projection 762b and a third locking projection 763b. It is fitted in the bush locking groove 17 when assembled to the housing 1 .

このように、本実施形態では、ブッシュ第1~第3当接部761,762,763にそれぞれ設けた第1~第3係止凸部761b,762b,763bを、操舵軸ハウジング本体部10の内側に形成したブッシュ係止溝17に係止させる構成となっている。これにより、操舵軸ハウジング1(操舵軸ハウジング本体部10)内におけるブッシュ76の第1軸線Xの方向の位置ずれを抑制することができ、当該ブッシュ76による操舵軸2の良好な支持に供する。 As described above, in the present embodiment, the first to third locking projections 761b, 762b, 763b provided on the first to third bush contacting portions 761, 762, 763 are attached to the steering shaft housing main body 10. It is configured to be locked in a bush locking groove 17 formed inside. As a result, displacement of the bush 76 in the direction of the first axis X in the steering shaft housing 1 (steering shaft housing main body 10) can be suppressed, and the steering shaft 2 can be well supported by the bush 76.

また、本実施形態では、操舵軸ハウジング1は、ブッシュ回転規制溝18を備え、ブッシュ回転規制溝18は、操舵軸ハウジング本体部10の内側に設けられ、第1軸線Xに対し直角な断面において第1軸線Xに関する径方向の内側に向かって開口する凹形状を有しており、ブッシュ76は、第1軸線Xに関する径方向の外側に突出する回転規制凸部764を有し、回転規制凸部764は、ブッシュ76が操舵軸ハウジング1に組み付けられた状態において、ブッシュ回転規制溝18に嵌まっている。 Further, in the present embodiment, the steering shaft housing 1 is provided with a bush rotation restricting groove 18. The bush rotation restricting groove 18 is provided inside the steering shaft housing main body 10, and in a cross section perpendicular to the first axis X The bush 76 has a concave shape that opens radially inward with respect to the first axis X, and the bush 76 has a rotation restricting convex portion 764 that protrudes radially outward with respect to the first axis X. The portion 764 is fitted in the bush rotation restricting groove 18 when the bush 76 is assembled to the steering shaft housing 1 .

すなわち、本実施形態では、ブッシュ第2当接部762の外側に設けた回転規制凸部764を、操舵軸ハウジング本体部10の内側に形成したブッシュ回転規制溝18に係止させる構成となっている。これにより、操舵軸ハウジング1(操舵軸ハウジング本体部10)内におけるブッシュ76の第1軸線Xの周方向の位置ずれを抑制することができ、当該ブッシュ76(ブッシュ第2当接部762)による操舵軸2の良好な支持に供する。 That is, in the present embodiment, the rotation restricting protrusion 764 provided on the outside of the second bush contacting portion 762 is engaged with the bush rotation restricting groove 18 formed on the inner side of the steering shaft housing body portion 10 . there is As a result, it is possible to suppress positional deviation of the bush 76 in the circumferential direction of the first axis X in the steering shaft housing 1 (steering shaft housing main body 10). It provides good support for the steering shaft 2.

また、本実施形態では、回転規制部材摺動部711,712は、回転規制部材第1突出部713、回転規制部材第2突出部714、及び回転規制部材中間部718を含み、回転規制部材第1突出部713は、第1軸線Xに関する周方向において、回転規制部材摺動部711,712の一方に設けられ、操舵軸2の外周面のうち第1軸線Xに関する周方向において操舵軸摺動部21,22の外側と当接可能であり、回転規制部材第2突出部714は、第1軸線Xに関する周方向において、回転規制部材摺動部711,712の他方に設けられ、操舵軸2の外周面のうち第1軸線Xに関する周方向において操舵軸摺動部21,22の外側と当接可能となっている。 Further, in the present embodiment, the rotation restricting member sliding portions 711 and 712 include a rotation restricting member first projecting portion 713, a rotation restricting member second projecting portion 714, and a rotation restricting member intermediate portion 718. The 1 projecting portion 713 is provided on one of the rotation restricting member sliding portions 711 and 712 in the circumferential direction about the first axis X, and the steering shaft slides in the circumferential direction about the first axis X on the outer peripheral surface of the steering shaft 2 . The rotation restricting member second projecting portion 714 is provided on the other side of the rotation restricting member sliding portions 711 and 712 in the circumferential direction about the first axis X, and is capable of coming into contact with the outer sides of the portions 21 and 22 . of the outer peripheral surface of the steering shaft sliding portion 21, 22 in the circumferential direction about the first axis X. As shown in FIG.

このように、回転規制部材71が回転規制部材第1突出部713及び回転規制部材第2突出部714を有することで、当該回転規制部材第1突出部713及び回転規制部材第2突出部714によって、操舵軸2が挟み込まれることになる。これにより、操舵軸2の回転を、より効果的に規制することができる。 In this way, the rotation restricting member 71 has the rotation restricting member first protrusion 713 and the rotation restricting member second protrusion 714 , so that the rotation restricting member first protrusion 713 and the rotation restricting member second protrusion 714 , the steering shaft 2 is sandwiched. As a result, the rotation of the steering shaft 2 can be restricted more effectively.

また、本実施形態では、操舵軸ハウジング1に対し操舵軸2が静止している状態において、回転規制部材第1突出部713及び回転規制部材第2突出部714は、操舵軸2と当接しており、かつ、回転規制部材中間部718は、操舵軸2と離間している。 Further, in this embodiment, when the steering shaft 2 is stationary with respect to the steering shaft housing 1 , the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 are in contact with the steering shaft 2 . In addition, the rotation restricting member intermediate portion 718 is separated from the steering shaft 2 .

このように、操舵軸2に対し回転規制部材第1突出部713と回転規制部材第2突出部714の2点を接触させることによって、操舵軸2に対し回転規制部材71を安定して接触させることができる。これにより、操舵軸2の回転を、より効果的に規制することができる。 In this manner, the rotation restricting member 71 is stably brought into contact with the steering shaft 2 by bringing the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 into contact with the steering shaft 2 at two points. be able to. As a result, the rotation of the steering shaft 2 can be restricted more effectively.

また、本実施形態では、回転規制部材第1突出部713は、操舵軸2の外周面と当接する部分が、第1軸線Xの方向に延びる平面形状を有し、回転規制部材第2突出部714は、操舵軸2の外周面と当接する部分が、第1軸線Xの方向に延びる平面形状を有する。 Further, in the present embodiment, the rotation restricting member first protrusion 713 has a planar shape extending in the direction of the first axis X at the portion that abuts on the outer peripheral surface of the steering shaft 2, and the rotation restricting member second protrusion 714 has a planar shape extending in the direction of the first axis X at a portion that contacts the outer peripheral surface of the steering shaft 2 .

このように、本実施形態では、回転規制部材第1突出部713及び回転規制部材第2突出部714のそれぞれが操舵軸2の外周面と当接する部分が、第1軸線Xの方向に延びる平面形状を有するように構成されている。これにより、回転規制部材第1突出部713及び回転規制部材第2突出部714の両平面によって、回転規制部材71の第1軸線X周りの回転を、より効果的に規制することができる。また、回転規制部材第1突出部713及び回転規制部材第2突出部714の両平面が操舵軸2の外周面と摺動し、これら摺動面同士の形状に馴染みが出ることで、当該両摺動面の相対位置関係がずれ難くなって、当該両摺動面の間の最適な摺動を維持することができる。 Thus, in this embodiment, the portions of the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 that contact the outer peripheral surface of the steering shaft 2 are flat surfaces extending in the direction of the first axis X. configured to have a shape. As a result, the rotation of the rotation restricting member 71 about the first axis X can be more effectively restricted by both planes of the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 . Both planes of the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 slide on the outer peripheral surface of the steering shaft 2, and the shapes of these sliding surfaces become familiar with each other. The relative positional relationship between the sliding surfaces is less likely to shift, and optimum sliding between the two sliding surfaces can be maintained.

また、本実施形態では、回転規制部材摺動部711,712は、回転規制部材本体部710とは別体に形成され、回転規制部材摺動部711,712は、回転規制部材本体部710に接続されており、かつ、回転規制部材摺動部711,712は、回転規制部材71よりも摩擦抵抗値が小さい。 Further, in the present embodiment, the rotation restricting member sliding portions 711 and 712 are formed separately from the rotation restricting member body portion 710 , and the rotation restricting member sliding portions 711 and 712 are formed on the rotation restricting member body portion 710 . They are connected, and the rotation restricting member sliding portions 711 and 712 have a smaller frictional resistance value than the rotation restricting member 71 .

このように、本実施形態では、回転規制部材摺動部711,712が、摺動部材75として、回転規制部材本体部710に対して別体に形成されていて、回転規制部材71よりも摩擦抵抗値が小さくなるように形成されている。これにより、回転規制部材71に対する操舵軸2の摺動抵抗を低減することができ、操舵軸2の円滑な支持に供する。 As described above, in the present embodiment, the rotation restricting member sliding portions 711 and 712 are formed separately from the rotation restricting member body portion 710 as the sliding member 75 , and the friction is greater than that of the rotation restricting member 71 . It is formed to have a small resistance value. As a result, the sliding resistance of the steering shaft 2 against the rotation restricting member 71 can be reduced, and the steering shaft 2 can be smoothly supported.

〔第2実施形態〕
図8は、本発明に係るステアリング装置の第2実施形態を示す。なお、本実施形態では、前記第1実施形態における回転規制部材71の回転規制部材摺動部711,712の構成を変更したものであり、他の構成については前記第1実施形態と同様である。よって、第1実施形態と同じ構成については、同一の符号を付すことにより、その説明を省略する。
[Second embodiment]
FIG. 8 shows a second embodiment of a steering device according to the invention. In this embodiment, the configuration of the rotation restricting member sliding portions 711 and 712 of the rotation restricting member 71 in the first embodiment is changed, and other configurations are the same as in the first embodiment. . Therefore, the same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof will be omitted.

図8は、本発明の第2実施形態に係るステアリング装置の断面図であって、図3のC-C線に沿って切断した、ステアリング装置の横断面図を示している。 FIG. 8 is a cross-sectional view of a steering device according to a second embodiment of the present invention, showing a transverse cross-sectional view of the steering device cut along line CC of FIG.

図8に示すように、本実施形態に係るステアリング装置では、回転規制部材第1突出部713において、操舵軸2の操舵軸摺動部21との対向面に、操舵軸摺動部21側へ緩やかに突出する凸円弧状の回転規制部材第1曲面部716aが形成されている。同様に、回転規制部材第2端部71bにおいても、操舵軸2の操舵軸摺動部22との対向面に、操舵軸摺動部22側へ緩やかに突出する凸円弧状の回転規制部材第2曲面部717aが形成されている。 As shown in FIG. 8 , in the steering device according to the present embodiment, the rotation restricting member first projecting portion 713 has a surface facing the steering shaft sliding portion 21 of the steering shaft 2 toward the steering shaft sliding portion 21 side. A first curved surface portion 716a of the rotation restricting member is formed in a gently protruding convex arc shape. Similarly, at the rotation restricting member second end portion 71b, a convex arc-shaped rotation restricting member second end 71b gently protruding toward the steering shaft sliding portion 22 is formed on the surface of the steering shaft 2 facing the steering shaft sliding portion 22. A double curved surface portion 717a is formed.

また、回転規制部材第1、第2曲面部716a,717aの形成に伴って、摺動部材75においても、回転規制部材第1、第2突出部713,714に被せられる回転規制部材摺動部711,712が、回転規制部材第1、第2曲面部716a,717aに対応する、操舵軸摺動部21,22側へ緩やかに突出する凸円弧状に形成されている。そして、かかる回転規制部材摺動部711,712は、第1軸線Xに関する周方向において、それぞれ操舵軸2に対し回転規制部材中間部718寄りの位置で当接している。 In addition, along with the formation of the rotation restricting member first and second curved surface portions 716a and 717a, the rotation restricting member sliding portion that covers the rotation restricting member first and second projecting portions 713 and 714 is formed in the sliding member 75 as well. 711 and 712 are formed in a convex circular arc shape that gently protrudes toward the steering shaft sliding portions 21 and 22 corresponding to the first and second curved surface portions 716a and 717a of the rotation restricting member. The rotation restricting member sliding portions 711 and 712 are in contact with the steering shaft 2 in the circumferential direction about the first axis X at positions closer to the rotation restricting member intermediate portion 718 .

以上のように、本実施形態では、回転規制部材第1突出部713及び回転規制部材第2突出部714は、第2軸線Yの方向において、操舵軸2の外周面と当接する部分が、操舵軸摺動部21,22側に突出する凸円弧状に形成されていて、回転規制部材第1突出部713及び回転規制部材第2突出部714は、第1軸線Xに関する周方向において、操舵軸2に対し回転規制部材中間部718寄りの位置で当接している。 As described above, in the present embodiment, the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 are configured such that the portion that contacts the outer peripheral surface of the steering shaft 2 in the direction of the second axis Y is a steering wheel. The rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 are formed in a convex circular arc shape projecting toward the shaft sliding portions 21 and 22, and the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714 extend in the circumferential direction about the first axis X to the steering axis. 2 at a position closer to the intermediate portion 718 of the rotation restricting member.

すなわち、本実施形態では、操舵軸摺動部21,22側へと凸円弧状に形成された回転規制部材第1突出部713及び回転規制部材第2突出部714が、周方向において、回転規制部材中間部718寄りの位置で操舵軸2と当接する構成となっている。これにより、回転規制部材摺動部711,712における、操舵軸2と接触する部分のモーメントアームL1,L2を比較的長くとることができる。このため、より小さな付勢力で操舵軸2の回転を規制することが可能となり、回転規制部材摺動部711,712と操舵軸2の間の摺動抵抗の増大を抑制することができる。 That is, in the present embodiment, the rotation restricting member first projecting portion 713 and the rotation restricting member second projecting portion 714, which are formed in an arc shape convex toward the steering shaft sliding portions 21 and 22, are arranged in the circumferential direction to restrict rotation. It is configured to contact the steering shaft 2 at a position near the member intermediate portion 718 . As a result, the moment arms L1 and L2 of the portions of the rotation restricting member sliding portions 711 and 712 that come into contact with the steering shaft 2 can be relatively long. Therefore, the rotation of the steering shaft 2 can be restricted with a smaller urging force, and an increase in sliding resistance between the rotation restricting member sliding portions 711 and 712 and the steering shaft 2 can be suppressed.

〔第3実施形態〕
図9は、本発明に係るステアリング装置の第3実施形態を示す。なお、本実施形態では、前記第1実施形態における回転規制部材71の外径の設定を変更したものであり、他の構成については前記第1実施形態と同様である。よって、第1実施形態と同じ構成については、同一の符号を付すことにより、その説明を省略する。
[Third embodiment]
FIG. 9 shows a third embodiment of a steering device according to the invention. In this embodiment, the setting of the outer diameter of the rotation restricting member 71 in the first embodiment is changed, and other configurations are the same as in the first embodiment. Therefore, the same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof will be omitted.

図9は、本発明の第3実施形態に係るステアリング装置の断面図であって、図3のC-C線に沿って切断した、ステアリング装置の横断面図を示している。 FIG. 9 is a cross-sectional view of a steering device according to a third embodiment of the present invention, showing a transverse cross-sectional view of the steering device cut along line CC of FIG.

図9に示すように、本実施形態に係るステアリング装置では、第2軸線Yの方向において、回転規制部材71のうち摺動部材75が被せられた、回転規制部材第1、第2突出部713,714を含む第1外径領域A1の外径(第1の外径D1)が、回転規制部材第2端部71bを含む第2外径領域A2の外径(第2の外径D2)よりも大きくなるように設定されている。換言すれば、第1軸線Xの方向において、回転規制部材71のうち、摺動部材75が被せられた回転規制部材第1、第2突出部713,714を含む第1外径領域A1と回転規制部材収容部15の第1のクリアランスC1が、回転規制部材第2端部71bを含む第2外径領域A2と回転規制部材収容部15の第2のクリアランスC2よりも小さくなるように設定されている。 As shown in FIG. 9 , in the steering device according to the present embodiment, in the direction of the second axis Y, rotation restricting member first and second protrusions 713 are covered with the sliding member 75 of the rotation restricting member 71 . , 714 (the first outer diameter D1) is equal to the outer diameter (the second outer diameter D2) of the second outer diameter region A2 including the rotation restricting member second end 71b. is set to be greater than In other words, in the direction of the first axis X, of the rotation restricting member 71, the first outer diameter region A1 including the rotation restricting member first and second projecting portions 713 and 714 covered with the sliding member 75 and the rotational The first clearance C1 of the restricting member housing portion 15 is set to be smaller than the second clearance C2 of the rotation restricting member housing portion 15 and the second outer diameter region A2 including the rotation restricting member second end portion 71b. ing.

そして、かかる構成により、第2軸線Yの方向における回転規制部材71の摺動時に、回転規制部材71の第1外径領域A1の外周面と回転規制部材収容部15の内面とが摺接し、回転規制部材71の第2外径領域A2の外周面と回転規制部材収容部15の内面とが離間するようになっている。 With such a configuration, when the rotation restricting member 71 slides in the direction of the second axis Y, the outer peripheral surface of the first outer diameter region A1 of the rotation restricting member 71 and the inner surface of the rotation restricting member accommodating portion 15 are in sliding contact, The outer peripheral surface of the second outer diameter area A2 of the rotation restricting member 71 and the inner surface of the rotation restricting member accommodating portion 15 are separated from each other.

以上のように、本実施形態では、回転規制部材71は、第1外径領域A1と第2外径領域A2を含み、第1外径領域A1は、第2軸線Yの方向において、回転規制部材第1突出部713及び回転規制部材第2突出部714を含む領域に設けられ、第2軸線Yに関する外径が第1の外径D1を有しており、第2外径領域A2は、第2軸線Yの方向において、回転規制部材第2端部71bを含む領域に設けられ、第2軸線Yに関する外径が第1の外径D1よりも小さい第2の外径D2を有している。 As described above, in the present embodiment, the rotation restricting member 71 includes the first outer diameter area A1 and the second outer diameter area A2, and the first outer diameter area A1 extends in the direction of the second axis Y to restrict rotation. Provided in a region including the member first projecting portion 713 and the rotation restricting member second projecting portion 714, the outer diameter with respect to the second axis Y has a first outer diameter D1, and the second outer diameter region A2 is In the direction of the second axis Y, it is provided in a region including the rotation restricting member second end portion 71b, and has a second outer diameter D2 smaller than the first outer diameter D1 with respect to the second axis Y. there is

このように、本実施形態では、第1外径領域A1の外径(第1の外径D1)が、第2外径領域A2の外径(第2の外径D2)よりも大きく設定されている。換言すれば、第1外径領域A1の外周面と回転規制部材収容部15の内面とのクリアランス(第1のクリアランスC1)が、第2外径領域A2の外周面と回転規制部材収容部15の内面とのクリアランス(第2のクリアランスC2)よりも小さく設定されている。これにより、回転規制部材収容部15内における回転規制部材71の傾きを効果的に規制することが可能となり、当該回転規制部材71の傾きに起因する操舵軸2の回転規制効果への影響を抑制することができる。 Thus, in the present embodiment, the outer diameter of the first outer diameter region A1 (first outer diameter D1) is set larger than the outer diameter of the second outer diameter region A2 (second outer diameter D2). ing. In other words, the clearance (first clearance C1) between the outer peripheral surface of the first outer diameter area A1 and the inner surface of the rotation restricting member accommodating portion 15 is equal to the outer peripheral surface of the second outer diameter area A2 and the rotation restricting member accommodating portion 15. is set smaller than the clearance (second clearance C2) with the inner surface of the . As a result, it is possible to effectively restrict the tilt of the rotation restricting member 71 in the rotation restricting member accommodating portion 15, and suppress the influence of the tilt of the rotation restricting member 71 on the effect of restricting the rotation of the steering shaft 2. can do.

本発明は前記実施形態の構成に限定されるものではなく、本発明の作用効果を奏し得る形態であれば、適用するステアリング装置の仕様等に応じて自由に変更可能である。 The present invention is not limited to the configuration of the above-described embodiment, and can be freely modified according to the specifications of the steering device to be applied, as long as it can produce the effects of the present invention.

以上説明した実施形態に基づくステアリング装置としては、例えば、以下に述べる態様のものが考えられる。 As a steering device based on the embodiment described above, for example, the following modes are conceivable.

すなわち、当該ステアリング装置は、その1つの態様において、ステアリング装置であって、操舵軸であって、操舵軸本体部と、操舵軸摺動部を含み、前記操舵軸本体部は、棒形状を有し、前記操舵軸本体部の長手方向に移動することで操舵輪を転舵可能であり、前記操舵軸摺動部は、前記操舵軸本体部の外周側に設けられている、前記操舵軸と、操舵軸ハウジングであって、操舵軸ハウジング本体部と、操舵軸収容部と、回転規制部材収容部を含み、前記操舵軸ハウジング本体部は、筒形状を有し、前記操舵軸収容部は、前記操舵軸ハウジング本体部の内側に形成された空間であって、前記操舵軸の少なくとも一部を収容しており、前記操舵軸の長手方向と平行な軸線に対し直角な断面において前記操舵軸の中心を通り、かつ前記操舵軸の長手方向と平行な軸線を第1軸線としたとき、前記回転規制部材収容部は、前記第1軸線に関する径方向に延びる軸線である第2軸線に沿って形成され、前記操舵軸収容部と繋がっている、前記操舵軸ハウジングと、アクチュエータであって、前記操舵軸の長手方向において、前記操舵軸ハウジングに対し前記操舵軸を移動させる力を付与する、前記アクチュエータと、回転規制部材であって、前記回転規制部材収容部に設けられ、回転規制部材本体部と、回転規制部材摺動部を含み、前記回転規制部材摺動部は、前記回転規制部材本体部のうち、前記第2軸線の方向における前記回転規制部材本体部の1対の端部である回転規制部材第1端部と回転規制部材第2端部のうち、前記操舵軸に近い前記回転規制部材第1端部に設けられ、前記回転規制部材摺動部は、前記第1軸線の方向における前記操舵軸の移動に伴い、前記操舵軸摺動部に対し摺動可能であり、かつ、前記回転規制部材摺動部は、前記操舵軸摺動部と当接することにより、前記操舵軸の前記第1軸線に関する所定角度以上の回転運動を規制可能である、前記回転規制部材と、付勢部材であって、前記第2軸線の方向において、前記回転規制部材摺動部を挟んで前記操舵軸の反対側に設けられ、前記操舵軸摺動部に向かって前記回転規制部材を付勢する、前記付勢部材と、を有する。 That is, in one aspect, the steering device is a steering device, which is a steering shaft, and includes a steering shaft main body portion and a steering shaft sliding portion, and the steering shaft main body portion has a bar shape. A steering wheel can be steered by moving in the longitudinal direction of the steering shaft main body, and the steering shaft sliding portion is provided on the outer peripheral side of the steering shaft main body. , a steering shaft housing including a steering shaft housing body portion, a steering shaft housing portion, and a rotation restricting member housing portion, wherein the steering shaft housing body portion has a cylindrical shape, and the steering shaft housing portion is A space formed inside the steering shaft housing main body, which accommodates at least a part of the steering shaft, and is a space of the steering shaft in a cross section perpendicular to an axis parallel to the longitudinal direction of the steering shaft. When an axis passing through the center and parallel to the longitudinal direction of the steering shaft is defined as a first axis, the rotation restricting member accommodating portion is formed along a second axis extending radially with respect to the first axis. the steering shaft housing connected to the steering shaft receiving portion; and an actuator, the actuator applying a force to the steering shaft housing to move the steering shaft in the longitudinal direction of the steering shaft. and a rotation restricting member, which is provided in the rotation restricting member accommodating portion and includes a rotation restricting member body portion and a rotation restricting member sliding portion, wherein the rotation restricting member sliding portion is the rotation restricting member main body portion. Of the rotation restricting member first end and the rotation restricting member second end, which are a pair of ends of the rotation restricting member main body in the direction of the second axis, the rotation restricting member closer to the steering shaft The rotation restricting member sliding portion provided at the first end of the member is slidable with respect to the steering shaft sliding portion as the steering shaft moves in the direction of the first axis, and The rotation restricting member sliding portion is capable of restricting rotational movement of the steering shaft with respect to the first axis by a predetermined angle or more by coming into contact with the steering shaft sliding portion, and a biasing member. provided on the opposite side of the steering shaft with respect to the rotation restricting member sliding portion in the direction of the second axis, and biasing the rotation restricting member toward the steering shaft sliding portion; and the biasing member.

前記ステアリング装置の好ましい態様において、前記ブッシュは、前記操舵軸収容部に設けられ、前記操舵軸の外周面と当接し、前記操舵軸を支持可能である。 In a preferred aspect of the steering device, the bush is provided in the steering shaft accommodating portion, contacts an outer peripheral surface of the steering shaft, and can support the steering shaft.

別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記ブッシュは、ブッシュ第1当接部、ブッシュ第2当接部、及びブッシュ第3当接部を含み、前記ブッシュ第1当接部、前記ブッシュ第2当接部、及び前記ブッシュ第3当接部は、前記第1軸線に関する周方向において、前記ブッシュ第1当接部、前記ブッシュ第2当接部、前記ブッシュ第3当接部の順に並んでおり、前記ブッシュ第2当接部は、前記第2軸線を通り、かつ前記第1軸線に対して直角な断面において、前記操舵軸を挟んで前記回転規制部材の反対側に設けられており、前記ブッシュ第2当接部は、前記操舵軸ハウジングに対し前記操舵軸が静止している状態において、前記操舵軸と接触しており、前記ブッシュ第1当接部及び前記ブッシュ第3当接部は、前記操舵軸ハウジングに対し前記操舵軸が静止している状態において、前記操舵軸と離間している。 In another preferred aspect, in any one of the aspects of the steering device, the bush includes a bush first contact portion, a bush second contact portion, and a bush third contact portion, and the bush first contact portion The portion, the bushing second contact portion, and the bushing third contacting portion are configured such that the bushing first contacting portion, the bushing second contacting portion, and the bushing third contacting portion are arranged in a circumferential direction about the first axis. The bush second contact portion is arranged in the order of the contact portions, and the second bush contact portion is on the opposite side of the rotation restricting member with the steering shaft interposed therebetween in a cross section passing through the second axis and perpendicular to the first axis. The bush second contact portion is in contact with the steering shaft when the steering shaft is stationary with respect to the steering shaft housing, and the bush first contact portion and the The bushing third contact portion is separated from the steering shaft when the steering shaft is stationary with respect to the steering shaft housing.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記ブッシュは、さらにブッシュ基部を含み、前記ブッシュ第1当接部、前記ブッシュ第2当接部、及び前記ブッシュ第3当接部は、前記ブッシュ基部と繋がっている。 In yet another preferred aspect, in any one of the aspects of the steering device, the bushing further includes a bushing base portion, the bushing first contact portion, the bushing second contacting portion, and the bushing third contacting portion. A portion is connected to the bushing base.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記操舵軸ハウジングは、前記操舵軸ハウジング本体部の内側に形成され、前記第1軸線に対し直角な断面において環状に形成されたブッシュ係止溝を備え、前記ブッシュ第1当接部、前記ブッシュ第2当接部、及び前記ブッシュ第3当接部のそれぞれは、前記第1軸線に関する径方向の外側に突出する第1係止凸部、第2係止凸部、及び第3係止凸部をそれぞれ有し、前記第1係止凸部、前記第2係止凸部、及び前記第3係止凸部のそれぞれは、前記ブッシュが前記操舵軸ハウジングに組み付けられた状態において、前記ブッシュ係止溝に嵌まっている。 In still another preferred aspect, in any one of the aspects of the steering device, the steering shaft housing is formed inside the steering shaft housing main body, and is formed in an annular shape in a cross section perpendicular to the first axis. Each of the bush first contact portion, the bush second contact portion, and the bush third contact portion has a first engagement groove that protrudes outward in a radial direction with respect to the first axis. Each of the first locking projection, the second locking projection, and the third locking projection has a locking projection, a second locking projection, and a third locking projection. , the bush is fitted in the bush engagement groove in a state in which the bush is assembled to the steering shaft housing.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記操舵軸ハウジングは、ブッシュ回転規制溝を備え、前記ブッシュ回転規制溝は、前記操舵軸ハウジング本体部の内側に設けられ、前記第1軸線に対し直角な断面において前記第1軸線に関する径方向の内側に向かって開口する凹形状を有しており、前記ブッシュは、前記第1軸線に関する径方向の外側に突出する回転規制凸部を有し、前記回転規制凸部は、前記ブッシュが前記操舵軸ハウジングに組み付けられた状態において、前記ブッシュ回転規制溝に嵌まっている。 In still another preferred aspect, in any one of the aspects of the steering device, the steering shaft housing includes a bush rotation restricting groove, the bush rotation restricting groove is provided inside the steering shaft housing main body, and the A cross section perpendicular to the first axis has a concave shape that opens radially inward with respect to the first axis, and the bush has a rotation restricting protrusion that protrudes radially outward in relation to the first axis. The rotation restricting protrusion is fitted in the bush rotation restricting groove when the bush is assembled to the steering shaft housing.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記回転規制部材摺動部は、回転規制部材第1突出部、回転規制部材第2突出部、及び回転規制部材中間部を含み、前記回転規制部材第1突出部は、前記第1軸線に関する周方向において、前記回転規制部材摺動部の一方に設けられ、前記操舵軸の外周面のうち前記第1軸線に関する周方向において前記操舵軸摺動部の外側と当接可能であり、前記回転規制部材第2突出部は、前記第1軸線に関する周方向において、前記回転規制部材摺動部の他方に設けられ、前記操舵軸の外周面のうち前記第1軸線に関する周方向において前記操舵軸摺動部の外側と当接可能である。 In still another preferred aspect, in any one of the aspects of the steering device, the rotation restricting member sliding portion includes a rotation restricting member first projection, a rotation restricting member second projecting portion, and a rotation restricting member intermediate portion. , the rotation restricting member first projecting portion is provided on one side of the rotation restricting member sliding portion in the circumferential direction about the first axis, and is provided on the outer peripheral surface of the steering shaft in the circumferential direction about the first axis. The rotation restricting member second projecting portion is provided on the other side of the rotation restricting member sliding portion in the circumferential direction about the first axis, and is capable of coming into contact with the outside of the steering shaft sliding portion. The outer peripheral surface can contact the outer side of the steering shaft sliding portion in the circumferential direction about the first axis.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記操舵軸ハウジングに対し前記操舵軸が静止している状態において、前記回転規制部材第1突出部及び前記回転規制部材第2突出部は、前記操舵軸と当接しており、かつ、前記回転規制部材中間部は、前記操舵軸と離間している。 In still another preferable aspect, in any one of the aspects of the steering device, when the steering shaft is stationary with respect to the steering shaft housing, the rotation restricting member first protrusion and the rotation restricting member second protrusion The intermediate portion of the rotation restricting member is in contact with the steering shaft, and the intermediate portion of the rotation restricting member is separated from the steering shaft.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記回転規制部材第1突出部及び前記回転規制部材第2突出部は、前記第2軸線の方向において、前記操舵軸の外周面と当接する部分が、前記操舵軸摺動部側に突出する凸円弧状に形成されていて、前記回転規制部材第1突出部及び前記回転規制部材第2突出部は、前記第1軸線に関する周方向において、前記操舵軸に対し前記回転規制部材中間部寄りの位置で当接している。 In still another preferable aspect, in any one of the aspects of the steering device, the rotation restricting member first protrusion and the rotation restricting member second protrusion are arranged on the outer peripheral surface of the steering shaft in the direction of the second axis. A portion that abuts against is formed in a convex arc shape that protrudes toward the steering shaft sliding portion, and the rotation restricting member first projecting portion and the rotation restricting member second projecting portion are formed in a circumferential direction about the first axis. In the direction, it abuts against the steering shaft at a position closer to the intermediate portion of the rotation restricting member.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記回転規制部材は、第1外径領域と第2外径領域を含み、前記第1外径領域は、前記第2軸線の方向において、前記回転規制部材第1突出部及び前記回転規制部材第2突出部を含む領域に設けられ、前記第2軸線に関する外径が第1の外径を有しており、前記第2外径領域は、前記第2軸線の方向において、前記回転規制部材第2端部を含む領域に設けられ、前記第2軸線に関する外径が前記第1の外径よりも小さい第2の外径を有している。 In still another preferable aspect, in any one of the aspects of the steering device, the rotation restricting member includes a first outer diameter region and a second outer diameter region, and the first outer diameter region is located along the second axis. direction, provided in a region including the rotation restricting member first protrusion and the rotation restricting member second protrusion, having a first outer diameter with respect to the second axis, and the second outer diameter A diameter region is provided in a region including the second end of the rotation restricting member in the direction of the second axis, and has a second outer diameter smaller than the first outer diameter with respect to the second axis. have.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記回転規制部材第1突出部は、前記操舵軸の外周面と当接する部分が、前記第1軸線の方向に延びる平面形状を有し、前記回転規制部材第2突出部は、前記操舵軸の外周面と当接する部分が、前記第1軸線の方向に延びる平面形状を有する。 In still another preferred aspect, in any one of the aspects of the steering device, the rotation restricting member first protrusion has a planar shape in which a portion that contacts the outer peripheral surface of the steering shaft extends in the direction of the first axis. A portion of the rotation restricting member second projecting portion that abuts on the outer peripheral surface of the steering shaft has a planar shape extending in the direction of the first axis.

さらに別の好ましい態様では、前記ステアリング装置の態様のいずれかにおいて、前記回転規制部材摺動部は、前記回転規制部材本体部とは別体に形成され、前記回転規制部材摺動部は、前記回転規制部材本体部に接続されており、かつ、前記回転規制部材摺動部は、前記回転規制部材よりも摩擦抵抗値が小さい。 In still another preferable aspect, in any one of the aspects of the steering device, the rotation restricting member sliding portion is formed separately from the rotation restricting member body portion, and the rotation restricting member sliding portion It is connected to the rotation restricting member main body, and the rotation restricting member sliding portion has a frictional resistance value smaller than that of the rotation restricting member.

1…操舵軸ハウジング、10…操舵軸ハウジング本体部、13…操舵軸収容部、15…回転規制部材収容部、2…操舵軸、20…操舵軸本体部、21,22…操舵軸摺動部、3…アクチュエータ、71…回転規制部材、710…回転規制部材本体部、711,712…回転規制部材摺動部、71a…回転規制部材第1端部、71b…回転規制部材第2端部、72…付勢部材、X…第1軸線、Y…第2軸線 Reference Signs List 1 Steering shaft housing 10 Steering shaft housing main body 13 Steering shaft accommodating portion 15 Rotation restricting member accommodating portion 2 Steering shaft 20 Steering shaft main body 21, 22 Steering shaft sliding portion 3 Actuator 71 Rotation restricting member 710 Rotation restricting member main body 711, 712 Rotation restricting member sliding portion 71a Rotation restricting member first end 71b Rotation restricting member second end 72... biasing member, X... first axis, Y... second axis

Claims (11)

ステアリング装置であって、
操舵軸であって、操舵軸本体部と、操舵軸摺動部を含み、
前記操舵軸本体部は、棒形状を有し、前記操舵軸本体部の長手方向に移動することで操舵輪を転舵可能であり、
前記操舵軸摺動部は、前記操舵軸本体部の外周側に設けられている、
前記操舵軸と、
操舵軸ハウジングであって、操舵軸ハウジング本体部と、操舵軸収容部と、回転規制部材収容部を含み、
前記操舵軸ハウジング本体部は、筒形状を有し、
前記操舵軸収容部は、前記操舵軸ハウジング本体部の内側に形成された空間であって、前記操舵軸の少なくとも一部を収容しており、
前記操舵軸の長手方向と平行な軸線に対し直角な断面において前記操舵軸の中心を通り、かつ前記操舵軸の長手方向と平行な軸線を第1軸線としたとき、
前記回転規制部材収容部は、前記第1軸線に関する径方向に延びる軸線である第2軸線に沿って形成され、前記操舵軸収容部と繋がっている、
前記操舵軸ハウジングと、
アクチュエータであって、前記操舵軸の長手方向において、前記操舵軸ハウジングに対し前記操舵軸を移動させる力を付与する、
前記アクチュエータと、
回転規制部材であって、前記回転規制部材収容部に設けられ、回転規制部材本体部と、
回転規制部材摺動部を含み、
前記回転規制部材摺動部は、前記回転規制部材本体部のうち、前記第2軸線の方向における前記回転規制部材本体部の1対の端部である回転規制部材第1端部と回転規制部材第2端部のうち、前記操舵軸に近い前記回転規制部材第1端部に設けられ、前記回転規制部材摺動部は、前記第1軸線の方向における前記操舵軸の移動に伴い、前記操舵軸摺動部に対し摺動可能であり、かつ、前記回転規制部材摺動部は、前記操舵軸摺動部と当接することにより、前記操舵軸の前記第1軸線に関する所定角度以上の回転運動を規制可能である、
前記回転規制部材と、
付勢部材であって、前記第2軸線の方向において、前記回転規制部材摺動部を挟んで前記操舵軸の反対側に設けられ、前記操舵軸摺動部に向かって前記回転規制部材を付勢する、
前記付勢部材と、
ブッシュであって、前記操舵軸収容部に設けられ、前記操舵軸の外周面と当接し、前記回転規制部材に対向して配置され、前記操舵軸を支持可能である、
前記ブッシュと、
を有することを特徴とするステアリング装置。
A steering device,
A steering shaft comprising a steering shaft main body portion and a steering shaft sliding portion,
The steering shaft main body portion has a bar shape, and is capable of turning a steerable wheel by moving in the longitudinal direction of the steering shaft main body portion,
The steering shaft sliding portion is provided on the outer peripheral side of the steering shaft body portion,
the steering shaft;
a steering shaft housing including a steering shaft housing body portion, a steering shaft housing portion, and a rotation restricting member housing portion;
The steering shaft housing main body has a cylindrical shape,
The steering shaft accommodating portion is a space formed inside the steering shaft housing main body portion and accommodates at least part of the steering shaft,
When an axis line passing through the center of the steering shaft and parallel to the longitudinal direction of the steering shaft in a cross section perpendicular to an axis line parallel to the longitudinal direction of the steering shaft is defined as a first axis,
The rotation restricting member accommodating portion is formed along a second axis that extends radially with respect to the first axis, and is connected to the steering shaft accommodating portion.
the steering shaft housing;
an actuator that applies a force to the steering shaft housing to move the steering shaft in the longitudinal direction of the steering shaft;
the actuator;
a rotation restricting member, which is provided in the rotation restricting member accommodating portion and includes a rotation restricting member body portion;
including a rotation restricting member sliding portion,
The rotation restricting member sliding portion includes a rotation restricting member first end portion, which is a pair of ends of the rotation restricting member main body portion in the direction of the second axis, and a rotation restricting member sliding portion. The rotation restricting member sliding portion is provided at a first end of the rotation restricting member near the steering shaft among the second ends, and the rotation restricting member sliding portion moves the steering shaft along with the movement of the steering shaft in the direction of the first axis. The rotation restricting member sliding portion is slidable with respect to the shaft sliding portion, and the rotation restricting member sliding portion contacts the steering shaft sliding portion to rotate the steering shaft at a predetermined angle or more with respect to the first axis. can be regulated,
the rotation restricting member;
The biasing member is provided on the opposite side of the steering shaft across the rotation restricting member sliding portion in the direction of the second axis, and biases the rotation restricting member toward the steering shaft sliding portion. force,
the biasing member;
A bushing provided in the steering shaft accommodating portion, abutting on an outer peripheral surface of the steering shaft, disposed facing the rotation restricting member, and capable of supporting the steering shaft.
the bush;
A steering device comprising:
請求項に記載のステアリング装置であって、
前記ブッシュは、ブッシュ第1当接部、ブッシュ第2当接部、及びブッシュ第3当接部を含み、
前記ブッシュ第1当接部、前記ブッシュ第2当接部、及び前記ブッシュ第3当接部は、前記第1軸線に関する周方向において、前記ブッシュ第1当接部、前記ブッシュ第2当接部、前記ブッシュ第3当接部の順に並んでおり、
前記ブッシュ第2当接部は、前記第2軸線を通り、かつ前記第1軸線に対して直角な断面において、前記操舵軸を挟んで前記回転規制部材の反対側に設けられており、
前記ブッシュ第2当接部は、前記操舵軸ハウジングに対し前記操舵軸が静止している状態において、前記操舵軸と接触しており、
前記ブッシュ第1当接部及び前記ブッシュ第3当接部は、前記操舵軸ハウジングに対し前記操舵軸が静止している状態において、前記操舵軸と離間していることを特徴とするステアリング装置。
The steering device according to claim 1 ,
the bushing includes a bushing first contact portion, a bushing second contacting portion, and a bushing third contacting portion;
The bush first contact portion, the bush second contact portion, and the bush third contact portion are arranged such that the bush first contact portion, the bush second contact portion, and the bush second contact portion , are arranged in the order of the bushing third contact portion,
The bush second contact portion is provided on the opposite side of the rotation restricting member across the steering shaft in a cross section passing through the second axis and perpendicular to the first axis,
The bushing second contact portion is in contact with the steering shaft when the steering shaft is stationary with respect to the steering shaft housing,
The steering device, wherein the bush first contact portion and the bush third contact portion are separated from the steering shaft when the steering shaft is stationary with respect to the steering shaft housing.
請求項に記載のステアリング装置であって、
前記ブッシュは、さらにブッシュ基部を含み、
前記ブッシュ第1当接部、前記ブッシュ第2当接部、及び前記ブッシュ第3当接部は、前記ブッシュ基部と繋がっていることを特徴とするステアリング装置。
The steering device according to claim 2 ,
the bushing further includes a bushing base;
The steering device, wherein the bush first contact portion, the bush second contact portion, and the bush third contact portion are connected to the bush base portion.
請求項に記載のステアリング装置であって、
前記操舵軸ハウジングは、前記操舵軸ハウジング本体部の内側に形成され、前記第1軸線に対し直角な断面において環状に形成されたブッシュ係止溝を備え、
前記ブッシュ第1当接部、前記ブッシュ第2当接部、及び前記ブッシュ第3当接部のそれぞれは、前記第1軸線に関する径方向の外側に突出する第1係止凸部、第2係止凸部、及び第3係止凸部をそれぞれ有し、
前記第1係止凸部、前記第2係止凸部、及び前記第3係止凸部のそれぞれは、前記ブッシュが前記操舵軸ハウジングに組み付けられた状態において、前記ブッシュ係止溝に嵌まっていることを特徴とするステアリング装置。
The steering device according to claim 3 ,
The steering shaft housing is formed inside the steering shaft housing main body, and has a bush locking groove formed in an annular shape in a cross section perpendicular to the first axis,
The first bushing contact portion, the second bushing contact portion, and the third bushing contact portion are respectively a first locking projection and a second locking projection projecting outward in a radial direction with respect to the first axis. Each has a stop convex portion and a third locking convex portion,
Each of the first locking projection, the second locking projection, and the third locking projection fits into the bush locking groove when the bush is assembled to the steering shaft housing. A steering device characterized by:
請求項に記載のステアリング装置であって、
前記操舵軸ハウジングは、ブッシュ回転規制溝を備え、
前記ブッシュ回転規制溝は、前記操舵軸ハウジング本体部の内側に設けられ、前記第1軸線に対し直角な断面において前記第1軸線に関する径方向の内側に向かって開口する凹形状を有しており、
前記ブッシュは、前記第1軸線に関する径方向の外側に突出する回転規制凸部を有し、
前記回転規制凸部は、前記ブッシュが前記操舵軸ハウジングに組み付けられた状態において、前記ブッシュ回転規制溝に嵌まっていることを特徴とするステアリング装置。
The steering device according to claim 3 ,
The steering shaft housing has a bush rotation restricting groove,
The bush rotation restricting groove is provided inside the steering shaft housing main body, and has a concave shape that opens radially inward with respect to the first axis in a cross section perpendicular to the first axis. ,
the bushing has a rotation restricting protrusion projecting outward in a radial direction with respect to the first axis;
The steering device, wherein the rotation restricting convex portion is fitted in the bush rotation restricting groove in a state in which the bush is assembled to the steering shaft housing.
請求項1に記載のステアリング装置であって、
前記回転規制部材摺動部は、回転規制部材第1突出部、回転規制部材第2突出部、及び回転規制部材中間部を含み、
前記回転規制部材第1突出部は、前記第1軸線に関する周方向において、前記回転規制部材摺動部の一方に設けられ、前記操舵軸の外周面のうち前記第1軸線に関する周方向において前記操舵軸摺動部の外側と当接可能であり、
前記回転規制部材第2突出部は、前記第1軸線に関する周方向において、前記回転規制部材摺動部の他方に設けられ、前記操舵軸の外周面のうち前記第1軸線に関する周方向において前記操舵軸摺動部の外側と当接可能であることを特徴とするステアリング装置。
The steering device according to claim 1,
The rotation restricting member sliding portion includes a rotation restricting member first projection, a rotation restricting member second projecting portion, and a rotation restricting member intermediate portion,
The rotation restricting member first projecting portion is provided on one side of the rotation restricting member sliding portion in the circumferential direction about the first axis, and is provided on the outer peripheral surface of the steering shaft in the circumferential direction about the first axis. contactable with the outside of the shaft sliding part,
The rotation restricting member second projecting portion is provided on the other side of the rotation restricting member sliding portion in the circumferential direction about the first axis, and is provided on the outer peripheral surface of the steering shaft in the circumferential direction about the first axis. A steering device capable of coming into contact with the outside of the shaft sliding portion.
請求項に記載のステアリング装置であって、
前記操舵軸ハウジングに対し前記操舵軸が静止している状態において、前記回転規制部材第1突出部及び前記回転規制部材第2突出部は、前記操舵軸と当接しており、かつ、前記回転規制部材中間部は、前記操舵軸と離間していることを特徴とするステアリング装置。
The steering device according to claim 6 ,
In a state in which the steering shaft is stationary with respect to the steering shaft housing, the rotation restricting member first projecting portion and the rotation restricting member second projecting portion are in contact with the steering shaft, and the rotation restricting member is in contact with the steering shaft. A steering device, wherein the member intermediate portion is separated from the steering shaft.
請求項に記載のステアリング装置であって、
前記回転規制部材第1突出部及び前記回転規制部材第2突出部は、前記第2軸線の方向において、前記操舵軸の外周面と当接する部分が、前記操舵軸摺動部側に突出する凸円弧状に形成されていて、
前記回転規制部材第1突出部及び前記回転規制部材第2突出部は、前記第1軸線に関する周方向において、前記操舵軸に対し前記回転規制部材中間部寄りの位置で当接していることを特徴とするステアリング装置。
The steering device according to claim 7 ,
The rotation restricting member first projecting portion and the rotation restricting member second projecting portion have projections that contact the outer peripheral surface of the steering shaft in the direction of the second axis and project toward the steering shaft sliding portion. formed in an arc,
The rotation restricting member first projecting portion and the rotation restricting member second projecting portion are in contact with the steering shaft at a position closer to an intermediate portion of the rotation restricting member in a circumferential direction about the first axis. steering device.
請求項に記載のステアリング装置であって、
前記回転規制部材は、第1外径領域と第2外径領域を含み、
前記第1外径領域は、前記第2軸線の方向において、前記回転規制部材第1突出部及び前記回転規制部材第2突出部を含む領域に設けられ、前記第2軸線に関する外径が第1の外径を有しており、
前記第2外径領域は、前記第2軸線の方向において、前記回転規制部材第2端部を含む領域に設けられ、前記第2軸線に関する外径が前記第1の外径よりも小さい第2の外径を有していることを特徴とするステアリング装置。
The steering device according to claim 6 ,
The rotation restricting member includes a first outer diameter region and a second outer diameter region,
The first outer diameter region is provided in a region including the rotation restricting member first projecting portion and the rotation restricting member second projecting portion in the direction of the second axis, and has a first outer diameter with respect to the second axis. has an outer diameter of
The second outer diameter region is provided in a region including the second end of the rotation restricting member in the direction of the second axis, and has an outer diameter with respect to the second axis that is smaller than the first outer diameter. A steering device characterized by having an outer diameter of
請求項に記載のステアリング装置であって、
前記回転規制部材第1突出部は、前記操舵軸の外周面と当接する部分が、前記第1軸線の方向に延びる平面形状を有し、
前記回転規制部材第2突出部は、前記操舵軸の外周面と当接する部分が、前記第1軸線の方向に延びる平面形状を有することを特徴とするステアリング装置。
The steering device according to claim 6 ,
A portion of the rotation restricting member first protrusion that contacts the outer peripheral surface of the steering shaft has a planar shape extending in the direction of the first axis,
A steering device, wherein a portion of the rotation restricting member second projecting portion that abuts on the outer peripheral surface of the steering shaft has a planar shape extending in the direction of the first axis.
請求項1に記載のステアリング装置であって、
前記回転規制部材摺動部は、前記回転規制部材本体部とは別体に形成され、前記回転規制部材摺動部は、前記回転規制部材本体部に接続されており、かつ、前記回転規制部材摺動部は、前記回転規制部材よりも摩擦抵抗値が小さいことを特徴とするステアリング装置。
The steering device according to claim 1,
The rotation restricting member sliding portion is formed separately from the rotation restricting member main body, the rotation restricting member sliding portion is connected to the rotation restricting member main body, and the rotation restricting member The steering device, wherein the sliding portion has a smaller frictional resistance value than the rotation restricting member.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004237917A (en) 2003-02-07 2004-08-26 Koyo Seiko Co Ltd Rack pinion type steering device
JP2005014736A (en) 2003-06-25 2005-01-20 Koyo Seiko Co Ltd Steering device and electric power steering device
JP2013159131A (en) 2012-02-01 2013-08-19 Jtekt Corp Rear wheel steering device
JP2017088172A (en) 2017-02-02 2017-05-25 オイレス工業株式会社 Sliding bearing formed of synthetic resin

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JPS6325268Y2 (en) * 1978-12-27 1988-07-11

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004237917A (en) 2003-02-07 2004-08-26 Koyo Seiko Co Ltd Rack pinion type steering device
JP2005014736A (en) 2003-06-25 2005-01-20 Koyo Seiko Co Ltd Steering device and electric power steering device
JP2013159131A (en) 2012-02-01 2013-08-19 Jtekt Corp Rear wheel steering device
JP2017088172A (en) 2017-02-02 2017-05-25 オイレス工業株式会社 Sliding bearing formed of synthetic resin

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