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JP7053320B2 - Gear damper - Google Patents
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JP7053320B2 - Gear damper - Google Patents

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JP7053320B2
JP7053320B2 JP2018049250A JP2018049250A JP7053320B2 JP 7053320 B2 JP7053320 B2 JP 7053320B2 JP 2018049250 A JP2018049250 A JP 2018049250A JP 2018049250 A JP2018049250 A JP 2018049250A JP 7053320 B2 JP7053320 B2 JP 7053320B2
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elastic body
peripheral side
outer peripheral
inner peripheral
rotating member
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JP2019158100A (en
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崇義 黒田
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Nok Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
    • F16F15/124—Elastomeric springs
    • F16F15/1245—Elastic elements arranged between substantially-radial walls of two parts rotatable with respect to each other, e.g. between engaging teeth

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Description

本発明は、トルク伝達および防振の技術に係るギヤダンパに関する。 The present invention relates to a gear damper according to a technique of torque transmission and vibration isolation.

従来から図３に示すように、相対回転可能に組み合わされた内周側回転部材６１および外周側回転部材７１を備え、内周側回転部材６１の外周面に径方向外方へ向けて内周側突起部６２を設けるとともに外周側回転部材７１の内周面に径方向内方へ向けて外周側突起部７２を設け、両回転部材６１，７１の間であって両突起部６２，７２の間に弾性体８１を装着し、この弾性体８１の弾性（バネ性）を利用することにより、回転時（トルク伝達時）に発生する振動や衝撃を吸収し低減させるギヤダンパ５１が知られている。弾性体８１としては図示するように、ゴム状弾性体の単体よりなるものが用いられている。 Conventionally, as shown in FIG. 3, the inner peripheral side rotating member 61 and the outer peripheral side rotating member 71, which are combined so as to be relatively rotatable, are provided, and the outer peripheral surface of the inner peripheral side rotating member 61 is provided with an inner circumference outward in the radial direction. A side protrusion 62 is provided, and an outer peripheral protrusion 72 is provided on the inner peripheral surface of the outer peripheral rotating member 71 inward in the radial direction. A gear damper 51 is known that absorbs and reduces vibrations and shocks generated during rotation (during torque transmission) by mounting an elastic body 81 between them and utilizing the elasticity (springiness) of the elastic body 81. .. As shown in the figure, the elastic body 81 is made of a single rubber-like elastic body.

特開２００５－１０６０８６公報JP-A-2005-106806A

しかしながら上記従来技術５１には、以下の不都合が指摘される。 However, the following inconveniences are pointed out in the above-mentioned prior art 51.

すなわち、一般的なゴム状弾性体のバネ特性は一定変位以上の荷重が入力したときに線形領域から非線形領域へ移行するため、移行後、トルクが急激に増大する性質を有している。この点に関し上記従来技術では、弾性体８１としてゴム状弾性体の単体よりなるものを用いているため、線形領域から非線形領域へかけてのバネ特性の乖離が大きくなり、よって設計の狙いとする特性を確保しにくいことがある。また、トルクが急激に増大するのに対応して、弾性体８１を圧縮変形させる回転部材６１，７１の強度をこの大きなトルクに耐え得るものとする必要がある。 That is, the spring characteristic of a general rubber-like elastic body shifts from a linear region to a non-linear region when a load of a certain displacement or more is input, and therefore has a property that the torque sharply increases after the transition. Regarding this point, in the above-mentioned prior art, since the elastic body 81 is made of a single rubber-like elastic body, the deviation of the spring characteristics from the linear region to the non-linear region becomes large, and therefore the design is aimed at. It may be difficult to secure the characteristics. Further, it is necessary that the strengths of the rotating members 61 and 71 that compress and deform the elastic body 81 can withstand this large torque in response to the rapid increase in torque.

上記不都合を解決する手法としては、弾性体８１の体積（ボリューム）を拡大することが考えられるが、実際には周辺部品の存在により弾性体装着スペースが限られるため、弾性体８１の体積を拡大することは容易ではない。 As a method for solving the above inconvenience, it is conceivable to increase the volume of the elastic body 81, but in reality, the space for mounting the elastic body is limited due to the presence of peripheral parts, so the volume of the elastic body 81 is increased. It's not easy to do.

弾性体のバネ特性における線形領域の傾きを同一としなから線形領域から非線形領域への移行ポイントを遅らせることができ、もってバネ特性を設計の狙いとする特性へ近付けることができるギヤダンパを提供することを課題とする。 Provided is a gear damper capable of delaying the transition point from the linear region to the non-linear region because the inclination of the linear region in the spring characteristic of the elastic body is the same, and thus the spring characteristic can be brought closer to the desired characteristic of the design. That is the issue.

ギヤダンパは、内周側回転部材と、前記内周側回転部材の外周側に相対回転可能に配置された外周側回転部材と、前記内周側回転部材の外周面に径方向外方へ向けて設けられた内周側突起部と、前記外周側回転部材の内周面に径方向内方へ向けて設けられた外周側突起部と、前記内周側回転部材の外周面と前記外周側回転部材の内周面と前記内周側突起部および前記外周側突起部の側面とによって四方を囲まれた弾性体装着スペースと、前記弾性体装着スペース内に配置された弾性体と、を備え、前記弾性体は、複数個のゴム状弾性体と剛材製のプレートとが円周方向に交互に並んだ構造を有し、前記弾性体装着スペース内に径方向間隙を開けて前記ゴム弾性体を配置し、前記内周側突起および前記外周側突起の側面間で押圧された前記ゴム状弾性体の圧縮変形によって前記径方向間隙をなくす。 The gear damper is directed outward in the radial direction toward the inner peripheral side rotating member, the outer peripheral side rotating member arranged so as to be relatively rotatable on the outer peripheral side of the inner peripheral side rotating member, and the outer peripheral surface of the inner peripheral side rotating member. The inner peripheral side protrusion provided, the outer peripheral side protrusion provided radially inward on the inner peripheral surface of the outer peripheral side rotating member , and the outer peripheral surface and the outer peripheral side of the inner peripheral side rotating member. It is provided with an elastic body mounting space surrounded on all sides by an inner peripheral surface of the rotating member, the inner peripheral side protrusion portion, and the side surface of the outer peripheral side protrusion portion, and an elastic body arranged in the elastic body mounting space. The elastic body has a structure in which a plurality of rubber-like elastic bodies and plates made of rigid material are alternately arranged in the circumferential direction, and the rubber elastic body has a radial gap in the elastic body mounting space. The body is arranged, and the radial gap is eliminated by the compressive deformation of the rubber-like elastic body pressed between the side surfaces of the inner peripheral protrusion and the outer peripheral protrusion.

弾性体のバネ特性における線形領域の傾きを同一としなから線形領域から非線形領域への移行ポイントを遅らせることができ、もってバネ特性を設計の狙いとする特性へ近付けることができるギヤダンパを提供することができる。 Provided is a gear damper that can delay the transition point from the linear region to the non-linear region because the inclination of the linear region in the spring characteristic of the elastic body is the same, and thus can bring the spring characteristic closer to the characteristic to be designed. be able to.

実施の形態に係るギヤダンパの要部断面図Sectional drawing of the main part of the gear damper which concerns on embodiment 同ギヤダンパにおける弾性体のバネ特性を示すグラフ図Graph diagram showing the spring characteristics of the elastic body in the same gear damper 従来技術に係るギヤダンパの断面図Cross-sectional view of the gear damper according to the prior art

図１に示すように、実施の形態に係るギヤダンパ１は、相対回転可能に組み合わされた内周側回転部材１１および外周側回転部材２１を備えており、内周側回転部材１１の外周面に径方向外方へ向けて内周側突起部１２が設けられるとともに外周側回転部材２１の内周面に径方向内方へ向けて外周側突起部２２が設けられ、両回転部材１１，２１の間であって両突起部１２，２２の間に弾性体装着スペース３１が設けられ、この弾性体装着スペース３１に弾性体４１が装着されている。 As shown in FIG. 1, the gear damper 1 according to the embodiment includes an inner peripheral side rotating member 11 and an outer peripheral side rotating member 21 combined so as to be relatively rotatable, and is provided on the outer peripheral surface of the inner peripheral side rotating member 11. An inner peripheral protrusion 12 is provided outward in the radial direction, and an outer peripheral protrusion 22 is provided on the inner peripheral surface of the outer peripheral rotating member 21 inward in the radial direction. An elastic body mounting space 31 is provided between the protrusions 12 and 22, and the elastic body 41 is mounted in the elastic body mounting space 31.

内周側回転部材１１および外周側回転部材２１は共に環状であって互いに同軸上に配置されている。内周側回転部材１１は例えば回転シャフトとされる。外周側回転部材２１は例えばギヤリングとされ、その外周面にギヤ歯部２４が設けられている。外周側回転部材２１は回転シャフトおよびギヤリング間に介装される環状のダンパハウジングであっても良く、この場合にはこのハウジングの外周側にギヤリングが嵌合される。内周側突起部１２および外周側突起部２２は互いにダンパ円周方向に変位して配置され、その側面にそれぞれ弾性体４１を押圧し圧縮変形させる押圧面１３，２３を備えている。弾性体装着スペース３１は内周側回転部材１１の外周面、外周側回転部材２１の内周面および両突起部１２，２２の側面（押圧面１３，２３）によって四方を囲まれるので、軸方向一方から見て扇形ないし略扇形の形状とされ、これに伴って弾性体４１も扇形ないし略扇形の形状もしくはダンパ円周方向に長い長方形の形状とされている。両突起部１２，２２、弾性体装着スペース３１および弾性体４１はそれぞれダンパ円周上に複数が設けられている。 The inner peripheral side rotating member 11 and the outer peripheral side rotating member 21 are both annular and are arranged coaxially with each other. The inner peripheral side rotating member 11 is, for example, a rotating shaft. The outer peripheral side rotating member 21 is, for example, a gear ring, and a gear tooth portion 24 is provided on the outer peripheral surface thereof. The outer peripheral side rotating member 21 may be an annular damper housing interposed between the rotating shaft and the gear ring, and in this case, the gear ring is fitted on the outer peripheral side of this housing. The inner peripheral side protrusion 12 and the outer peripheral side protrusion 22 are arranged so as to be displaced from each other in the circumferential direction of the damper, and the side surfaces thereof are provided with pressing surfaces 13 and 23 for pressing and compressing and deforming the elastic body 41, respectively. The elastic body mounting space 31 is surrounded on all sides by the outer peripheral surface of the inner peripheral side rotating member 11, the inner peripheral surface of the outer peripheral side rotating member 21, and the side surfaces (pressing surfaces 13, 23) of both protrusions 12, 22 in the axial direction. When viewed from one side, it has a fan-shaped or substantially fan-shaped shape, and accordingly, the elastic body 41 also has a fan-shaped or substantially fan-shaped shape or a rectangular shape long in the circumferential direction of the damper. A plurality of both protrusions 12, 22, the elastic body mounting space 31 and the elastic body 41 are provided on the circumference of the damper.

弾性体４１は、ゴム状弾性体４２と金属または樹脂等よりなる剛材製のプレート４３がダンパ円周方向に交互に並んだ構造とされ、すなわちプレート挟み込み構造（直列バネ構造）の弾性体とされている。図ではゴム状弾性体４２が３ブロックおよびプレート４３が２枚ほど組み合わされているが、組み合わせ数はとくに限定されず、ゴム状弾性体４２が弾性体４１の両端部に配置されていれば良い。プレート４３については２枚のプレート４３が互いに平行に配置されているが、２枚のプレート４３がそれぞれダンパ中心軸線のほうへ向けて配置されていても良い。 The elastic body 41 has a structure in which a rubber-like elastic body 42 and a plate 43 made of a rigid material made of metal or resin are alternately arranged in the circumferential direction of the damper, that is, an elastic body having a plate sandwiching structure (series spring structure). Has been done. In the figure, three blocks of the rubber-like elastic body 42 and about two plates 43 are combined, but the number of combinations is not particularly limited, and the rubber-like elastic body 42 may be arranged at both ends of the elastic body 41. .. Regarding the plate 43, the two plates 43 are arranged in parallel with each other, but the two plates 43 may be arranged toward the damper center axis, respectively.

ゴム状弾性体４２は、プレート４３の内周端部４３ａを被覆する被覆部（内周側被覆部）およびプレート４３の外周端部４３ｂを被覆する被覆部（外周側被覆部）４５を一体に備えている。ゴム状弾性体４２はプレート４３を埋設しており、プレート４３はゴム状弾性体４２に埋設されている。 The rubber-like elastic body 42 integrally includes a covering portion (inner peripheral side covering portion) that covers the inner peripheral end portion 43a of the plate 43 and a covering portion (outer peripheral side covering portion) 45 that covers the outer peripheral end portion 43b of the plate 43. I have. The rubber-like elastic body 42 has a plate 43 embedded therein, and the plate 43 is embedded in the rubber-like elastic body 42.

プレート４３の内周端部４３ａを被覆する被覆部４４は、ゴム状弾性体４２の内周側の表面４２ａに対し径方向内方へ向けて突出していても良く、装着の初期状態から内周側回転部材１１の外周面に接触していても良い。同様に、プレート４３の外周端部４３ｂを被覆する被覆部４４は、ゴム状弾性体４２の外周側の表面４２ｂに対し径方向外方へ向けて突出していても良く、装着の初期状態から外周側回転部材２１の内周面に接触していても良い。 The covering portion 44 covering the inner peripheral end portion 43a of the plate 43 may protrude inward in the radial direction with respect to the surface 42a on the inner peripheral side of the rubber-like elastic body 42, and may protrude inward from the initial state of mounting. It may be in contact with the outer peripheral surface of the side rotating member 11. Similarly, the covering portion 44 that covers the outer peripheral end portion 43b of the plate 43 may protrude outward in the radial direction with respect to the outer peripheral side surface 42b of the rubber-like elastic body 42, and may protrude outward from the initial state of mounting. It may be in contact with the inner peripheral surface of the side rotating member 21.

弾性体４１は、弾性体装着スペース３１に接着剤を用いることなく非接着で組み付けられている。ゴム状弾性体４２の内周側の表面４２ａと内周側回転部材１１の外周面の間には初期的な径方向間隙が形成されても良く、同様に、ゴム状弾性体４２の外周側の表面４２ｂと外周側回転部材２１の内周面の間には初期的な径方向間隙が形成されても良い。 The elastic body 41 is assembled in the elastic body mounting space 31 without using an adhesive. An initial radial gap may be formed between the inner peripheral side surface 42a of the rubber-like elastic body 42 and the outer peripheral surface of the inner peripheral side rotating member 11. Similarly, the outer peripheral side of the rubber-like elastic body 42 may be formed. An initial radial gap may be formed between the surface 42b of the surface and the inner peripheral surface of the outer peripheral side rotating member 21.

上記したように、弾性体４１のバネ特性については、弾性体４１の充填率（弾性体装着スペース３１の容積に対する弾性体４１の体積の比率）が関係しており、この充填率を低減させることで弾性体４１のバネ特性における線形領域から非線形領域への移行ポイントを遅らせることが可能となるが、上記従来技術のように弾性体８１がゴム状弾性体の単体よりなる場合には、単純に弾性体８１の体積を縮小して充填率を低減させると弾性体８１の荷重入力初期における剛性（初期剛性）も低下してしまうことになる。
これに対し本実施の形態では、弾性体４１が、ゴム状弾性体４２と剛材製のプレート４３の組み合わせ構造とされ、すなわちプレート挟み込み構造（直列バネ構造）とされているため、弾性体４１全体としての体積を縮小することなくゴム状弾性体４２の体積を縮小することが可能とされ、よって図２のグラフ図に示すように初期剛性を低下させることなく、線形領域から非線形領域への移行ポイントをＰ１からＰ２へと遅らせることが可能とされる。したがって弾性体４１のバネ特性における線形領域の傾きを同一としながら線形領域から非線形領域への移行ポイントを遅らせることができ、もってバネ特性を設計の狙いとする特性へ近付けることができる。 As described above, the spring characteristics of the elastic body 41 are related to the filling ratio of the elastic body 41 (the ratio of the volume of the elastic body 41 to the volume of the elastic body mounting space 31), and this filling ratio should be reduced. It is possible to delay the transition point from the linear region to the non-linear region in the spring characteristics of the elastic body 41, but when the elastic body 81 is made of a single rubber-like elastic body as in the above-mentioned prior art, it is simply If the volume of the elastic body 81 is reduced to reduce the filling rate, the rigidity (initial rigidity) of the elastic body 81 at the initial stage of load input also decreases.
On the other hand, in the present embodiment , the elastic body 41 has a combination structure of the rubber-like elastic body 42 and the plate 43 made of a rigid material, that is, a plate sandwiching structure (series spring structure), and therefore the elastic body 41. It is possible to reduce the volume of the rubber-like elastic body 42 without reducing the volume of the 41 as a whole, and thus from the linear region to the non-linear region without reducing the initial rigidity as shown in the graph of FIG. It is possible to delay the transition point of P1 to P2. Therefore, the transition point from the linear region to the non-linear region can be delayed while the inclination of the linear region in the spring characteristic of the elastic body 41 is the same, and the spring characteristic can be brought closer to the characteristic aimed at by the design.

また、弾性体４１のバネ特性における線形領域から非線形領域への移行ポイントをＰ１からＰ２へと遅らせることができると、これに伴って、バネ特性の非線形ラインが回転部材１１，２１の強度限界領域（図２のグラフ図における「ＮＧ」領域）へ突入するタイミングを遅らせることが可能とされる。したがって回転部材１１，２１の強度を極端に高める必要をなくすことができる。 Further, if the transition point from the linear region to the non-linear region in the spring characteristic of the elastic body 41 can be delayed from P 1 to P 2 , the non-linear line of the spring characteristic is accompanied by the strength of the rotating members 11 and 21. It is possible to delay the timing of entering the limit region (“NG” region in the graph of FIG. 2). Therefore, it is possible to eliminate the need to extremely increase the strength of the rotating members 11 and 21.

また、プレート４３の内周端部４３ａや外周端部４３ｂを被覆部４４，４５で被覆するとともにプレート４３をゴム状弾性体４２に埋設するようにしたため、剛材製のプレート４３が回転部材１１，２１に直接接触するのを防止することが可能とされる。したがってプレート４３が回転部材１１，２１に直接接触することにより異音が発生したり摩耗が発生したりするのを抑制することができる。 Further, since the inner peripheral end portion 43a and the outer peripheral end portion 43b of the plate 43 are covered with the covering portions 44 and 45 and the plate 43 is embedded in the rubber-like elastic body 42, the plate 43 made of a rigid material is a rotating member 11. , 21 can be prevented from coming into direct contact. Therefore, it is possible to suppress the generation of abnormal noise and the occurrence of wear due to the direct contact of the plate 43 with the rotating members 11 and 21.

１ ギヤダンパ
１１ 内周側回転部材
１２内周側突起部
１３，２３ 押圧面
２１ 外周側回転部材
２２ 外周側突起部
２４ ギヤ歯部
３１ 弾性体装着スペース
４１ 弾性体
４２ ゴム状弾性体
４２ａ，４２ｂ 表面
４３ プレート
４３ａ 内周端部
４３ｂ 外周端部
４４，４５ 被覆部 1 Gear damper 11 Inner peripheral rotation member 12 Inner peripheral protrusion 13, 23 Pressing surface 21 Outer peripheral rotation member 22 Outer peripheral protrusion 24 Gear tooth 31 Elastic body mounting space 41 Elastic body 42 Rubber-like elastic body 42a, 42b Surface 43 Plate 43a Inner peripheral end 43b Outer peripheral end 44,45 Covered part

Claims (3)

内周側回転部材と、
前記内周側回転部材の外周側に相対回転可能に配置された外周側回転部材と、
前記内周側回転部材の外周面に径方向外方へ向けて設けられた内周側突起部と、
前記外周側回転部材の内周面に径方向内方へ向けて設けられた外周側突起部と、
前記内周側回転部材の外周面と前記外周側回転部材の内周面と前記内周側突起部および前記外周側突起部の側面とによって四方を囲まれた弾性体装着スペースと、
前記弾性体装着スペース内に配置された弾性体と、
を備え、
前記弾性体は、
複数個のゴム状弾性体と剛材製のプレートとが円周方向に交互に並んだ構造を有し、
前記弾性体装着スペース内に径方向間隙を開けて前記ゴム弾性体を配置し、
前記内周側突起および前記外周側突起の側面間で押圧された前記ゴム状弾性体の圧縮変形によって前記径方向間隙をなくす、
ことを特徴とするギヤダンパ。 Inner circumference side rotating member and
An outer peripheral side rotating member arranged so as to be relatively rotatable on the outer peripheral side of the inner peripheral side rotating member,
An inner peripheral side protrusion provided on the outer peripheral surface of the inner peripheral side rotating member in the radial direction outward, and
An outer peripheral side protrusion provided on the inner peripheral surface of the outer peripheral side rotating member inward in the radial direction, and a protrusion on the outer peripheral side.
An elastic body mounting space surrounded on all sides by the outer peripheral surface of the inner peripheral side rotating member, the inner peripheral surface of the outer peripheral side rotating member, the inner peripheral side protrusion portion, and the side surface of the outer peripheral side protrusion portion.
The elastic body arranged in the elastic body mounting space and
Equipped with
The elastic body is
It has a structure in which a plurality of rubber-like elastic bodies and plates made of rigid material are alternately arranged in the circumferential direction.
The rubber elastic body is placed with a radial gap in the elastic body mounting space.
The radial gap is eliminated by the compressive deformation of the rubber-like elastic body pressed between the inner peripheral side protrusion and the side surface of the outer peripheral side protrusion.
A gear damper characterized by that. 請求項１記載のギヤダンパにおいて、
前記ゴム状弾性体は、前記プレートの内周端部および／または外周端部を被覆する被覆部を一体に備えることを特徴とするギヤダンパ。 In the gear damper according to claim 1,
The rubber-like elastic body is a gear damper integrally provided with a covering portion that covers an inner peripheral end portion and / or an outer peripheral end portion of the plate. 請求項１または２記載のギヤダンパにおいて、
前記プレートは、前記ゴム状弾性体に埋設されていることを特徴とするギヤダンパ。 In the gear damper according to claim 1 or 2.
The plate is a gear damper embedded in the rubber-like elastic body.
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US3257826A (en) * 1965-07-27 1966-06-28 Lord Corp Flexible coupling
JPS604473A (en) * 1983-06-21 1985-01-10 Komatsu Ltd Sprocket device for caterpillar type vehicle
JP2570340B2 (en) * 1987-04-06 1997-01-08 株式会社ブリヂストン Seismic isolation structure
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