JPH0679907B2 - Rear wheel steering mechanism - Google Patents
Rear wheel steering mechanismInfo
- Publication number
- JPH0679907B2 JPH0679907B2 JP21193186A JP21193186A JPH0679907B2 JP H0679907 B2 JPH0679907 B2 JP H0679907B2 JP 21193186 A JP21193186 A JP 21193186A JP 21193186 A JP21193186 A JP 21193186A JP H0679907 B2 JPH0679907 B2 JP H0679907B2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- wheel steering
- arm
- support shaft
- slide member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
- B62D7/14—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
- B62D7/15—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels
- B62D7/1518—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels comprising a mechanical interconnecting system between the steering control means of the different axles
- B62D7/1527—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels comprising a mechanical interconnecting system between the steering control means of the different axles comprising only mechanical parts, i.e. without assistance means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は車両の後輪操舵機構に関する。Description: TECHNICAL FIELD The present invention relates to a rear wheel steering mechanism of a vehicle.
（従来の技術） 本出願人は特願昭61−79567号（特開昭62−238170号公
報参照）において、前輪操舵機構から取出した回転を伝
達する前後方向の主軸と、これの後端に設けた直径方向
のアームと、これの後方に離間して配置された左右方向
に移動自在な出力部材と、これに設けた上下方向のガイ
ドと、これとアーム間に介設され、ガイドに対し上下方
向に摺動自在で、且つアームに対し主軸の直径方向に摺
動自在なスライド部材と、これを上下方向に移動させる
駆動装置とから成り、主軸の回転をスライド部材の上下
動で出力部材の左右方向動に変換して後輪を転舵するよ
うにした車両の後輪操舵機構を提案した。(Prior Art) In the Japanese Patent Application No. 61-79567 (see Japanese Patent Laid-Open No. 62-238170), the applicant of the present invention has a main shaft in the front-rear direction for transmitting the rotation extracted from the front wheel steering mechanism and a rear end thereof. The diametrical arm provided, the output member which is arranged rearwardly of the arm and is movable in the left-right direction, the vertical guide provided on the output member, and the intermediate member provided between the arm and the guide. The slide member is slidable in the vertical direction and is slidable in the diametrical direction of the main shaft with respect to the arm, and the drive device for moving the same in the vertical direction. The rotation of the main shaft is output by the vertical movement of the slide member. We proposed a rear-wheel steering mechanism for a vehicle that converts the left-right direction of the vehicle to steer the rear wheels.
これによれば、出力部材自体を上下に移動させずに、ス
ライド部材を上下動させるだけなので、後輪の舵角調整
に要する駆動力は小さなもので足りる。According to this, since the slide member is only moved up and down without moving the output member itself up and down, a small driving force is required to adjust the steering angle of the rear wheels.
（発明が解決しようとする問題点） 斯かる後輪操舵機構においては、駆動装置によるスライ
ド部材の上下動を円滑に行わしめるためには、両者間の
寸法誤差、ガタ及び摩耗の吸収が問題となる。(Problems to be Solved by the Invention) In such a rear wheel steering mechanism, in order to smoothly perform the vertical movement of the slide member by the drive device, dimensional error between them, absorption of backlash and wear are problems. Become.
そこで、本発明の目的は、スライド部材と駆動装置間の
寸法誤差、ガタ及び摩耗を効果的に吸収し、スライド部
材の円滑なる上下動機能を保障するようにした車両の後
輪操舵機構を提供するにある。Therefore, an object of the present invention is to provide a rear wheel steering mechanism for a vehicle, which effectively absorbs dimensional error, play and wear between the slide member and the drive device and ensures a smooth vertical movement function of the slide member. There is.
（問題点を解決するための手段） 以上の目的を達成すべく本発明は、前記形式の後輪操舵
機構において、駆動装置（71）はスライド部材（51）の
左右に配置されてモータ（72）により回転駆動される一
対の上下方向の送りネジ（76），（76）及びこれに螺合
するナット部材（77），（77）を備える一方、スライド
部材（51）を移動自在に支持して左右一対のナット部材
（77），（77）間に架設される左右方向の支軸（61）を
設け、この支軸（61）を左右に分割してその間にスプリ
ング（66）を縮装するとともに、支軸（61）の両端をナ
ット部材（77），（77）に対し揺動自在に係合したこと
を特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a rear wheel steering mechanism of the type described above, in which the drive device (71) is disposed on the left and right of the slide member (51) and the motor (72 ) Is provided with a pair of vertical feed screws (76), (76) and nut members (77), (77) screwed thereto, and a slide member (51) is movably supported. A pair of left and right nut members (77), a horizontal support shaft (61) is installed between the nut members (77), the support shaft (61) is divided into left and right, and a spring (66) is installed between them. In addition, both ends of the support shaft (61) are swingably engaged with the nut members (77), (77).
（作用） モータ（72）により左右の送りネジ（76），（76）が回
転すると、これに螺合した左右のナット部材（77），
（77）がそれぞれ同期して上下動し、両ナット部材（7
7），（77）間に架設した支軸（61）を介してスライド
部材（55）が上下動する。(Operation) When the left and right feed screws (76), (76) are rotated by the motor (72), the left and right nut members (77), which are screwed into the screws,
(77) move up and down in synchronization with each other, and both nut members (7
The slide member (55) moves up and down via the support shaft (61) installed between 7) and (77).
そして両送りネジ（76），（76）間の間隔の誤差、送り
ネジ（76）とナット部材（77）間のガタや摩耗があって
も、支軸（61）は左右に分割されてその間にスプリング
（66）を縮装しているため、スプリング（66）の弾発付
勢により支軸（61）の両端はナット部材（77），（77）
に圧接し、この拡開方向の圧力でナット部材（77）と送
りネジ（76）間のガタ及び摩耗を吸収でき、両送りネジ
（76），（76）間の寸法誤差も吸収できる。Even if there is an error in the space between the feed screws (76) and (76), or there is looseness or wear between the feed screw (76) and the nut member (77), the support shaft (61) is divided into left and right and Since the spring (66) is contracted to the nut, both ends of the support shaft (61) are nut members (77), (77) due to the elastic force of the spring (66).
The pressure in the expanding direction can absorb the play and wear between the nut member (77) and the feed screw (76), and can also absorb the dimensional error between the feed screws (76) and (76).
またモータ（72）と送りネジ（76），（76）間に例えば
ギヤ列の位相の誤差及びガタ、送りネジ（76）とナット
部材（77）間の位相の誤差等の原因で左右のナット部材
（77），（77）に高さ変化が生じても、支軸（61）の両
端はナット部材（77），（77）に対し揺動自在に係合さ
れているため、支軸（61）の傾きが許容され、上下動の
際の抵抗の増大を解消でき、支軸（61）を円滑に上下動
できる。In addition, the left and right nuts may be different from each other due to, for example, a phase error of the gear train and play between the motor (72) and the feed screws (76) and (76), and a phase error between the feed screw (76) and the nut member (77). Even if the heights of the members (77) and (77) change, both ends of the support shaft (61) are swingably engaged with the nut members (77) and (77). The inclination of 61) is allowed, the increase in resistance when moving up and down can be eliminated, and the support shaft (61) can be moved up and down smoothly.
（実施例） 以下に添付図面を基に実施例を説明する。(Examples) Examples will be described below with reference to the accompanying drawings.
第１図は前後輪操舵装置の概略斜視図で、前輪操舵機構
は、ハンドル（１）、回転入力用ピニオン軸（２）、ラ
ック軸（３）、左右のタイロッド（４）及びナックルア
ーム（５）等から成り、（６）は前輪操舵ギヤボック
ス、（７）は左右の前輪であり、ギヤボックス（６）に
はラック軸（５）と噛合う回転取出用ピニオン軸（８）
が後方に突出して組込まれる。回転取出用ピニオン軸
（８）にはリンケージ軸（９）が連結され、更にリンケ
ージ軸（９）には後輪操舵機構の回転入力軸（11）が連
結される。FIG. 1 is a schematic perspective view of a front and rear wheel steering device. The front wheel steering mechanism includes a steering wheel (1), a rotation input pinion shaft (2), a rack shaft (3), left and right tie rods (4) and a knuckle arm (5). ) Etc., (6) is a front wheel steering gear box, (7) is left and right front wheels, and the gear box (6) has a rotary take-out pinion shaft (8) meshing with the rack shaft (5).
Is projected and installed in the rear. A linkage shaft (9) is connected to the rotary take-out pinion shaft (8), and a rotation input shaft (11) of a rear wheel steering mechanism is connected to the linkage shaft (9).
後輪操舵機構の要部は第２図に示す如くで、回転入力軸
（11）、主軸（21）、出力部材（41）、スライド部材
（51）、駆動装置（71）から成り、各部の詳細は第４図
乃至第７図に示し、また第１図中、（81）は後輪操舵ギ
ヤボックス、（91）は制御装置をなすECU、（92）は車
速センサ、（94）はタイロッド、（95）はナックルアー
ム、（97）は後輪である。The main part of the rear wheel steering mechanism is as shown in FIG. 2, and comprises a rotary input shaft (11), a main shaft (21), an output member (41), a slide member (51) and a drive device (71). Details are shown in FIGS. 4 to 7, and in FIG. 1, (81) is a rear wheel steering gear box, (91) is an ECU as a control device, (92) is a vehicle speed sensor, and (94) is a tie rod. , (95) is a knuckle arm, and (97) is a rear wheel.
図示のように前後方向を向く回転入力軸（11）の後端に
はピニオン（12）が形成され、この入力軸（11）の直上
方に主軸（21）が平行に配置され、主軸（21）の後部に
はピニオン（12）に下方から噛合う扇状のインターナル
ギヤ（22）が一体に垂設され、更にインターナルギヤ
（22）の後面には主軸（21）の直径方向のアーム（23）
が一体に形成される。これらインターナルギヤ（22）及
びアーム（23）は後輪（87）の操舵中立位置では垂直状
態に維持される。As shown in the figure, a pinion (12) is formed at the rear end of the rotary input shaft (11) facing the front-rear direction, and the main shaft (21) is arranged in parallel directly above the input shaft (11). ) A fan-shaped internal gear (22) that meshes with the pinion (12) from below is vertically provided integrally with the rear portion of the internal gear (22), and a diametrical arm (21) of the main shaft (21) is provided on the rear surface of the internal gear (22). twenty three)
Are integrally formed. The internal gear (22) and the arm (23) are maintained in the vertical state at the steering neutral position of the rear wheel (87).
回転入力軸（11）は前後のボールベアリング（13）及び
ニードルベアリング（14）を介して筒部材（15）内に回
転自在に組込まれ、筒部材（15）は第５図の如く入力軸
（11）偏心して支持する。この筒部材（15）は後輪操舵
ギヤボックス（81）の前部（82）内に回転可能に組込ま
れ、筒部材（15）の上部には左右一対の凹段部（16），
（16）が形成される。ギヤボックス前部（82）の左右に
は凹段部（16），（16）の側方に開口する左右一対のネ
ジ孔（83），（83）が形成され、このネジ孔（83），
（83）内には先端が凹段部（16），（16）にそれぞれ当
接する左右一対の調整ネジ（17），（17）が螺着され
る。The rotary input shaft (11) is rotatably incorporated into the tubular member (15) via the front and rear ball bearings (13) and needle bearings (14), and the tubular member (15) has an input shaft (as shown in FIG. 5). 11) Support with eccentricity. The tubular member (15) is rotatably incorporated in the front portion (82) of the rear wheel steering gear box (81), and a pair of left and right concave step portions (16) are provided at the upper portion of the tubular member (15).
(16) is formed. A pair of left and right screw holes (83), (83) opening to the side of the recessed step portions (16), (16) are formed on the left and right sides of the gear box front part (82), and these screw holes (83),
Inside the (83), a pair of left and right adjusting screws (17), (17), whose tips abut against the concave stepped portions (16), (16), are screwed.
また主軸（21）は前後のボールベアリング（24），（2
5）を介してギヤボックス前部（82）内に回転自在に組
込まれ、両ベアリング（24）、（25）の外輪間にはカラ
ー（26）とその後端のフランジ（27）が架設される。こ
こで、前方のベアリング（24）の内輪と主軸（21）とは
軸方向へ移動可能に嵌合され、このベアリング（24）の
外輪及び後方のベアリング（25）の外輪とギヤボックス
前部（82）内ともともに軸方向へ移動可能に嵌合されて
いる。ギヤボックス前部（82）の前面には主軸（21）の
前方に開口するネジ孔（84）が同心に形成され、このネ
ジ孔（84）内には調整ネジ（28）が螺着され、この調整
ネジ（28）と前方のベアリング（24）の外輪との間には
キャップ（29）が介設される。更に主軸（21）の前端に
固着したリテーナ（31）と前方のベアリング（24）の内
輪との間にはコイルスプリング（32）が縮装され、カラ
ー（26）とフランジ（27）との間にも皿バネ（33）が縮
装される。In addition, the main shaft (21) has front and rear ball bearings (24), (2
It is rotatably installed in the front part (82) of the gearbox via 5), and the collar (26) and the flange (27) at the rear end are installed between the outer rings of both bearings (24) and (25). . Here, the inner ring of the front bearing (24) and the main shaft (21) are fitted so as to be movable in the axial direction, and the outer ring of this bearing (24) and the outer ring of the rear bearing (25) and the front part of the gear box ( Both of them are fitted so that they can move in the axial direction. A screw hole (84) opening forward of the main shaft (21) is concentrically formed on the front surface of the gear box front part (82), and an adjusting screw (28) is screwed into the screw hole (84). A cap (29) is provided between the adjusting screw (28) and the outer ring of the front bearing (24). Further, a coil spring (32) is contracted between the retainer (31) fixed to the front end of the main shaft (21) and the inner ring of the front bearing (24), and between the collar (26) and the flange (27). The disc spring (33) is also compacted.
そしてアーム（23）の後方には出力部材（41）が離間し
て配置され、この出力部材（41）は左右方向に向いて水
平に配置された軸状物で、その中央部には上下方向のガ
イド（42）がボルト（43），（43）にて固設される。出
力部材（41）はギヤボックス後部（85）の左右にメタル
ベアリング（44），（44）を介して左右方向へ移動自在
に組込まれ、ガイド（42）とアーム（23）間にはスライ
ド部材（51）が介設される。An output member (41) is arranged behind the arm (23) so as to be separated therefrom. The output member (41) is a shaft-like object which is horizontally arranged so as to be oriented in the left-right direction, and the output member (41) is arranged in the vertical direction at the center thereof. The guide (42) is fixed by bolts (43) and (43). The output member (41) is movably incorporated in the left and right directions of the gear box rear part (85) via the metal bearings (44) and (44), and is a slide member between the guide (42) and the arm (23). (51) is installed.
スライド部材（51）は、アーム（23）に対し後方からテ
ーパ嵌合して主軸（21）の直径方向に摺動自在な第１ス
ライドピース（52）と、ガイド（42）に対し前方からテ
ーパ嵌合して上下方向に摺動自在な第２スライドピース
（53）と、両スライドピース（52），（53）間に介設さ
れて相互に回転自在に嵌合したセンターピース（54）
と、このセンターピース（54）を移動自在に支持する左
右方向の支軸（61）とから成る。The slide member (51) is tapered from the rear with respect to the arm (23) and is slidable in the diametrical direction of the main shaft (21), and the guide (42) is tapered from the front. A second slide piece (53) fitted and slidable in the vertical direction, and a center piece (54) interposed between the slide pieces (52) and (53) and rotatably fitted to each other.
And a horizontal support shaft (61) for movably supporting the center piece (54).
第１スライドピース（52）とアーム（23）とのテーパ嵌
合部の左右にはニードルベアリング（55），（55）が介
装され、第２スライドピース（53）とガイド（42）との
テーパ嵌合部の左右にもニードルベアリング（56），
（56）が介装される。また第１スライドピース（52）と
センターピース（54）前部との嵌合部にはボールベアリ
ング（57）が介装され、第２スライドピース（53）とセ
ンターピース（54）後部との嵌合部にもボールベアリン
グ（58）が介装される。更にセンターピース（54）はス
ライドベアリング（59）を介装して支軸（61）上に組付
けられる。Needle bearings (55) and (55) are provided on the left and right of the tapered fitting portion between the first slide piece (52) and the arm (23), and the second slide piece (53) and the guide (42) are connected to each other. Needle bearings (56) on the left and right of the taper fitting,
(56) is interposed. Further, a ball bearing (57) is interposed in the fitting portion between the first slide piece (52) and the front portion of the center piece (54), and the fitting between the second slide piece (53) and the rear portion of the center piece (54). A ball bearing (58) is also installed at the joint. Further, the center piece (54) is mounted on the support shaft (61) via the slide bearing (59).
支軸（61）は左右に分割された筒軸（62）と棒軸（64）
から成り、筒軸（62）内に棒軸（64）を摺動自在に組込
むとともに、両者間にコイルスプリング（66）を縮装
し、筒軸（62）と棒軸（64）の外端は前後方向に巾広
で、且つ正断面が円弧状をなす係合突部（63），（65）
に形成されている。The support shaft (61) is divided into left and right cylinder shafts (62) and rod shafts (64).
The rod shaft (64) is slidably assembled in the cylinder shaft (62), and the coil spring (66) is contracted between the two, and the outer ends of the cylinder shaft (62) and the bar shaft (64) are Are engagement protrusions (63), (65) that are wide in the front-rear direction and have an arc-shaped front section.
Is formed in.
そして斯かる支軸（61）を上下動させる駆動装置（71）
が設けられる。A drive device (71) for vertically moving the support shaft (61).
Is provided.
駆動装置（71）は、回転数と回転角をモニターするエン
コーダ付モータ（72）と、左右方向に並べた４個のギヤ
（73），（74），（74），（75）と、左右一対をなす上
下方向の送りネジ（76），（76）と、左右一対のナット
部材（77），（77）とから成る。モータ（72）はギヤボ
ックス後部（85）の一側部に固設されてその上端には駆
動ギヤ（73）を備え、左右一対の送りねじ（76），（7
6）はギヤボックス後部（85）内に回転自在に縦設され
てスライド部材（51）の両側方に位置し、送りネジ（7
6）の上端にはともに被動ギヤ（74）が固着される。左
右の被動ギヤ（74），（74）間には中間ギヤ（75）が介
設され、以上４個のギヤ（73），（74），（74），（7
5）はギヤボックス後部（85）上に突出し、且つギヤカ
バー（86）により覆われている。また送りネジ（76），
（76）にそれぞれ螺合するナット部材（77），（77）の
内端は正断面が円弧状をなす係合凹部（78），（78）に
形成されており、この係合凹部（78），（78）内に前記
支軸（61）端部の係合突部（63），（65）がそれぞれ係
合している。The drive device (71) includes a motor (72) with an encoder that monitors the number of rotations and a rotation angle, four gears (73), (74), (74), and (75) that are arranged side by side in the left-right direction. It is composed of a pair of vertical feed screws (76) and (76) and a pair of left and right nut members (77) and (77). The motor (72) is fixedly installed on one side of the rear part (85) of the gear box and has a drive gear (73) at the upper end thereof, and a pair of left and right feed screws (76), (7
6) is vertically rotatably installed in the rear part (85) of the gear box and is located on both sides of the slide member (51).
The driven gear (74) is fixed to both upper ends of 6). An intermediate gear (75) is interposed between the left and right driven gears (74), (74), and the above four gears (73), (74), (74), (7)
5) projects above the rear portion (85) of the gear box and is covered by the gear cover (86). Also the feed screw (76),
The inner ends of the nut members (77) and (77) that are respectively screwed into the (76) are formed in engaging recesses (78) and (78) having a circular arc-shaped cross section. ), (78), engaging projections (63), (65) at the end of the support shaft (61) are engaged, respectively.
斯くして左右のナット部材（77），（77）間に支軸（6
1）が架設される。Thus, between the left and right nut members (77) and (77), the support shaft (6
1) is erected.
以上の後輪操舵機構要部の基本原理は第３図に示す如く
で、スライド部材（51）は一個の球体として表される。The basic principle of the main part of the rear wheel steering mechanism is as shown in FIG. 3, and the slide member (51) is represented as one sphere.
ここで、エンコーダ付モータ（72）の回転数及び回転角
情報は、ECU（91）に入力され、車速センサ（92）から
の車速情報と比較して車速に応じた最適の前後輪舵角比
が決定され、モータ（72）の作動は常に確認されてい
る。Here, the rotation speed and rotation angle information of the motor with encoder (72) are input to the ECU (91) and compared with the vehicle speed information from the vehicle speed sensor (92) to determine the optimum front-rear wheel steering angle ratio according to the vehicle speed. Is determined and the operation of the motor (72) is always confirmed.
次に作動を説明するが、前輪操舵機構の作動は既知の通
りであるため、後輪操舵機構要部の作動のみについて述
べる。Next, the operation will be described, but since the operation of the front wheel steering mechanism is known, only the operation of the main part of the rear wheel steering mechanism will be described.
先ず前輪操舵機構から取出した回転が入力軸（11）に入
力されると、ピニオン（22）とインターナルギヤ（22）
による減速比ｋで減速された回転が主軸（21）に伝達さ
れる。First, when the rotation extracted from the front wheel steering mechanism is input to the input shaft (11), the pinion (22) and the internal gear (22)
The rotation reduced by the reduction ratio k is transmitted to the main shaft (21).
一方、車速情報に応じたモータ（72）の回転がギヤ（7
3），（74），（75），（74）を経て左右の送りネジ（7
6），（76）に伝達されると、送りネジ（76），（76）
の回転で左右のナット部材（77），（77）が上下動し、
この間に架設された支軸（61）を介してセンターピース
（54）が上下に平行移動し、第１スライドピース（52）
はアーム（23）に沿って主軸（21）の直径方向に摺動
し、また第２スライドピース（53）はガイド（42）に沿
って上下方向に摺動する。On the other hand, the rotation of the motor (72) according to the vehicle speed information causes the gear (7
3), (74), (75), (74), left and right lead screw (7
6), (76), the lead screw (76), (76)
The left and right nut members (77), (77) move up and down by the rotation of
The center piece (54) moves up and down in parallel through the support shaft (61) installed between the first slide piece (52).
Slides along the arm (23) in the diameter direction of the main shaft (21), and the second slide piece (53) slides vertically along the guide (42).
そしてアーム（23）は主軸（21）と一体に回転するた
め、アーム（23）に嵌合した第１スライドピース（52）
は主軸（21）に対しクランク回転し、このクランク回転
はセンターピース（54）の左右方向動に変換される。こ
のセンターピース（54）と一体に第２スライドピース
（53）も左右方向動し、この第２スライドピース（53）
に嵌合したガイド（42）と一体の出力部材（41）も左右
方向動する。Since the arm (23) rotates integrally with the main shaft (21), the first slide piece (52) fitted to the arm (23)
Rotates with respect to the main shaft (21), and this crank rotation is converted into lateral movement of the center piece (54). The second slide piece (53) also moves laterally integrally with the center piece (54), and the second slide piece (53)
The output member (41) integrated with the guide (42) fitted to the shaft also moves in the left-right direction.
斯くして前輪（７），（７）に対する後輪（97），（9
7）の舵角比は車速に応じた最適値に調整される。Thus, the front wheels (7), (7) and the rear wheels (97), (9
The steering angle ratio in 7) is adjusted to the optimum value according to the vehicle speed.
ところで、第２図に仮想線で示すように他方の被動ギヤ
（74）に噛合う駆動ギヤ（73′）を備えたモータ（7
2′）を追加しても良い。By the way, a motor (7) provided with a drive gear (73 ') meshing with the other driven gear (74) as shown in phantom in FIG.
2 ') may be added.
以上において、センターピース（54）の支軸（61）は筒
軸（62）と棒軸（64）との左右に分割され、且つその間
に縮装したコイルスプリング（66）により左右の筒袖
（62）と棒軸（64）は拡開方向に弾発付勢されているの
で、左右のナット部材（77），（77）には拡開方向の圧
力が加えられている。これによりナット部材（77）と送
りネジ（76）間のガタ及び摩耗が自動的に吸収され、ま
た左右の送りネジ（76），（76）間の寸法誤差も吸収さ
れ、両送りネジ（76），（76）に螺合したナット部材
（77），（77）間への支軸（61）の架設状態が常に保障
される。In the above, the support shaft (61) of the center piece (54) is divided into the right and left of the cylinder shaft (62) and the rod shaft (64), and the coil springs (66) compressed between them divide the left and right cylinder sleeves (62). ) And the rod shaft (64) are elastically urged in the expanding direction, so that the left and right nut members (77), (77) are applied with the expanding pressure. As a result, the play and wear between the nut member (77) and the feed screw (76) are automatically absorbed, and the dimensional error between the left and right feed screws (76), (76) is also absorbed, and both feed screws (76 ), (76) is always screwed to the nut member (77), the installation state of the support shaft (61) between the (77) is guaranteed.
そして支軸（61）の両端とナット部材（77），（77）と
は正断面が円弧状の係合突部（63），（65）と係合凹部
（78），（78）とで嵌合されているため、支軸（61）の
傾きが許容されている。従ってモータ（72）から送りネ
ジ（76），（76）へのギヤ（73），（74），（75）の位
相の誤差及びガタ、送りネジ（76）とナット部材（77）
との位相の誤差等があって、左右のナット部材（77），
（77）に高さ変化が生じた場合であっても、支軸（61）
の傾きが許容されるので、支軸（61）の上下動の際の抵
抗が増大するのを防止でき、これにより支軸（61）を容
易に上下動させてセンターピース（54）の円滑なる上下
動が保障される。The both ends of the support shaft (61) and the nut members (77) and (77) are composed of engagement projections (63) and (65) and engagement recesses (78) and (78) having an arc-shaped front cross section. Since they are fitted together, tilting of the support shaft (61) is allowed. Therefore, the phase error and play of the gears (73), (74) and (75) from the motor (72) to the feed screws (76) and (76), the feed screw (76) and the nut member (77).
There is an error in the phase with the left and right nut members (77),
Even if the height of (77) changes, the support shaft (61)
Since the tilt of the support shaft (61) is allowed, it is possible to prevent an increase in the resistance when the support shaft (61) moves up and down, which allows the support shaft (61) to easily move up and down to smooth the center piece (54). Vertical movement is guaranteed.
このように誤差やガタ及び摩耗を吸収できるので、送り
ネジ（76），ナット部材（77）、支軸（61）、その分割
された筒軸（62）及び棒軸（64）、ギヤ（73），（7
4），（75）等の部品自身と相互の関係寸法を厳しくし
なくとも、コイルスプリング（66）の働き等によってス
ライド部材（51）、即ちセンターピース（54）の円滑な
る上下動機能を保障することができる。Since the error, play and wear can be absorbed in this manner, the feed screw (76), the nut member (77), the support shaft (61), the divided cylinder shaft (62) and rod shaft (64), and the gear (73). ), (7
The smooth vertical movement function of the slide member (51), that is, the center piece (54) is ensured by the action of the coil spring (66), etc., even if the mutual dimensions of the parts such as 4) and (75) are not made strict. can do.
（発明の効果） 以上のように本発明によれば、スライド部材と駆動装置
間の寸法誤差、ガタ及び摩耗を効果的に吸収するので、
スライド部材の円滑なる上下動機能を保障することがで
きる。(Effects of the Invention) As described above, according to the present invention, the dimensional error between the slide member and the driving device, backlash, and wear are effectively absorbed.
The smooth vertical movement function of the slide member can be guaranteed.
第１図は前後輪操舵装置の概略斜視図、第２図は後輪操
舵機構要部の透視斜視図、第３図はその基本原理図、第
４図は第２図IV−IV線断面図、第５図は第４図Ｖ−Ｖ線
断面図、第６図と第７図は第２図VI−VI線及びVII−VII
線の各断面図である。 尚、図面中、（８）は回転取出用ピニオン軸、（９）は
リンケージ軸、（11）は入力軸、（12）はピニオン、
（21）は主軸、（22）はインターナルギヤ、（23）はア
ーム、（41）は出力部材、（42）はガイド、（51）はス
ライド部材、（52）、（53）はスライドピース、（54）
はセンターピース、（61）は支軸、（62）は筒軸、（6
3）は係合突部、（64）は棒軸、（65）は係合突部、（6
6）はコイルスプリング、（71）は駆動装置、（72）は
モータ、（73），（74），（75）はギヤ、（76）は送り
ネジ、（77）はナット部材、（78）は係合凹部、（81）
はギヤボックス、（86）はギヤカバー、（91）は制御装
置、（92）は車速センサである。FIG. 1 is a schematic perspective view of a front and rear wheel steering device, FIG. 2 is a perspective view of a rear wheel steering mechanism, FIG. 3 is a basic principle diagram thereof, and FIG. 4 is a sectional view taken along line IV-IV of FIG. 5 is a sectional view taken along line VV of FIG. 4, and FIGS. 6 and 7 are taken along line VI-VI and VII-VII of FIG.
It is each sectional drawing of a line. In the drawings, (8) is a rotary extraction pinion shaft, (9) is a linkage shaft, (11) is an input shaft, (12) is a pinion,
(21) is a main shaft, (22) is an internal gear, (23) is an arm, (41) is an output member, (42) is a guide, (51) is a slide member, (52) and (53) are slide pieces. , (54)
Is the centerpiece, (61) is the support shaft, (62) is the cylinder shaft, (6
3) is an engaging protrusion, (64) is a rod shaft, (65) is an engaging protrusion, (6)
6) is a coil spring, (71) is a drive device, (72) is a motor, (73), (74) and (75) are gears, (76) is a feed screw, (77) is a nut member, and (78). Is the engaging recess, (81)
Is a gear box, (86) is a gear cover, (91) is a control device, and (92) is a vehicle speed sensor.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿部 賢 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 (72)発明者 大山 泰晴 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 (56)参考文献 特開 昭62−238170（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ken Abe 1-4-1 Chuo, Wako-shi, Saitama Inside the Honda R & D Co., Ltd. (72) Inventor Yasuharu Oyama 1-4-1 Chuo, Wako-shi, Saitama Incorporated in Honda R & D Co., Ltd. (56) Reference JP-A-62-238170 (JP, A)
Claims (1)
前後方向の主軸と、該主軸の後端に設けた直径方向のア
ームと、該アームの後方に離間して配置された左右方向
に移動自在な出力部材と、該出力部材に設けた上下方向
のガイドと、該ガイドと前記アーム間に介設され、ガイ
ドに対し上下方向に摺動自在で、且つアームに対し前記
主軸の直径方向に摺動自在なスライド部材と、該スライ
ド部材を上下方向に移動させる駆動装置とから成り、前
記主軸の回転を前記スライド部材の上下動で前記出力部
材の左右方向動に変換して後輪を転舵するようにした車
両の後輪操舵機構において、 前記駆動装置は前記スライド部材の左右に配置されてモ
ータにより回転駆動される一対の上下方向の送りネジ及
び該送りネジに螺合するナット部材を備える一方、 左右一対の該ナット部材間に架設されて前記スライド部
材を移動自在に支持する左右方向の支軸を設け、 該支軸を左右に分割するとともにその間にスプリングを
縮装し、 更に該支軸の両端を前記ナット部材に対し揺動自在に係
合したこと、 を特徴とする車両の後輪操舵機構。1. A front-rear direction main shaft for transmitting rotation extracted from a front wheel steering mechanism, a diametrical arm provided at a rear end of the main shaft, and a left-right direction which is disposed behind the arm and spaced apart from each other. A free output member, a vertical guide provided on the output member, and a guide provided between the guide and the arm, slidable in the vertical direction with respect to the guide, and in the diameter direction of the main shaft with respect to the arm. It is composed of a slidable slide member and a drive device for moving the slide member in the vertical direction, and the rotation of the main shaft is converted into the horizontal movement of the output member by the vertical movement of the slide member to roll the rear wheel. In a rear wheel steering mechanism for a vehicle that is steered, the drive device includes a pair of vertical feed screws that are arranged on the left and right of the slide member and are driven to rotate by a motor, and a nut member that is screwed to the feed screws. Prepare On the other hand, a horizontal support shaft is provided between the pair of left and right nut members to movably support the slide member, the support shaft is divided into left and right, and a spring is compressed between the support shaft and the support shaft. A rear wheel steering mechanism for a vehicle, wherein both ends of a shaft are swingably engaged with the nut member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21193186A JPH0679907B2 (en) | 1986-09-09 | 1986-09-09 | Rear wheel steering mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21193186A JPH0679907B2 (en) | 1986-09-09 | 1986-09-09 | Rear wheel steering mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6368471A JPS6368471A (en) | 1988-03-28 |
| JPH0679907B2 true JPH0679907B2 (en) | 1994-10-12 |
Family
ID=16614048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21193186A Expired - Lifetime JPH0679907B2 (en) | 1986-09-09 | 1986-09-09 | Rear wheel steering mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0679907B2 (en) |
-
1986
- 1986-09-09 JP JP21193186A patent/JPH0679907B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6368471A (en) | 1988-03-28 |
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