JP6538519B2 - Damper apparatus and steering apparatus - Google Patents

Damper apparatus and steering apparatus Download PDF

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JP6538519B2
JP6538519B2 JP2015208061A JP2015208061A JP6538519B2 JP 6538519 B2 JP6538519 B2 JP 6538519B2 JP 2015208061 A JP2015208061 A JP 2015208061A JP 2015208061 A JP2015208061 A JP 2015208061A JP 6538519 B2 JP6538519 B2 JP 6538519B2
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housing
elastic body
large diameter
shaft
peripheral surface
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JP2017077873A (en
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達也 大橋
達也 大橋
祐樹 花田
祐樹 花田
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Nok Corp
JTEKT Corp
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Nok Corp
JTEKT Corp
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Priority to JP2015208061A priority Critical patent/JP6538519B2/en
Priority to US15/331,686 priority patent/US10611404B2/en
Priority to CN201610922095.1A priority patent/CN107097842B/en
Priority to EP16195031.6A priority patent/EP3159240B1/en
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Description

本発明は、ダンパ装置、及びこのダンパ装置を用いたステアリング装置に関する。   The present invention relates to a damper device and a steering device using the damper device.

車両のステアリング装置では、タイロッドを介して転舵輪（タイヤ）に連結される転舵シャフトを軸線方向に往復移動させることにより、転舵輪の向きを変える。転舵シャフトは、ハウジングに摺動可能に収容されている。転舵シャフトがその往復移動範囲の限界に達すると、転舵シャフトの端部に形成された大径部がハウジングに衝突し、転舵シャフトの移動範囲が物理的に規制される。具体的には、運転者によるステアリングホイールの操作に伴って、転舵シャフトを軸線方向に移動させる力が（正）入力される。又は、転舵輪が縁石に乗り上げる等の作用により、転舵輪から転舵シャフトに対し、転舵シャフトを軸線方向に移動させる過大な力が（逆）入力される。正、逆の入力に伴って、大径部がハウジングに衝突するまで転舵シャフトが軸線方向に移動すると、「エンド当て」が生じる。
ステアリング装置では、エンド当て部にダンパ装置を用いてエンド当て時の衝撃を吸収する。係るダンパ装置としては、大径部の端面とハウジングとの軸線方向の間に、ハウジングに包囲された状態で介装される衝撃吸収部材を備えるものが知られている。 In the steering apparatus of a vehicle, the direction of the steered wheels is changed by reciprocating the steered shaft connected to the steered wheels (tires) via the tie rods in the axial direction. The steering shaft is slidably accommodated in the housing. When the turning shaft reaches the limit of its reciprocating movement range, the large diameter portion formed at the end of the turning shaft collides with the housing, and the movement range of the turning shaft is physically restricted. Specifically, in accordance with the driver's operation of the steering wheel, a force for moving the steering shaft in the axial direction is (positively) input. Alternatively, an excessive force for moving the steered shaft in the axial direction is (reversely) input from the steered wheels to the steered shaft by an operation such as the steered wheels riding on a curb. As the steered shaft moves axially until the large diameter portion collides with the housing with positive and negative inputs, an "end hit" occurs.
In the steering device, a damper device is used at the end abutment portion to absorb an impact at the time of end abutment. As such a damper device, there is known one including an impact absorbing member interposed in a state of being surrounded by the housing between the end face of the large diameter portion and the axial direction of the housing.

特許文献１のステアリング装置は、ボールジョイント部材（大径部）とラックハウジングとの間に介装される緩衝部材（衝撃吸収部材）を備える。衝撃吸収部材は、大径部がハウジングに向けて衝突しようとする際に、大径部からの衝突を受けて弾性部材によって衝突衝撃を吸収する。衝撃吸収部材は、大径部に接触して衝突衝撃を受けるフランジ状のストッパ部材（衝撃受部材）を有する。   The steering apparatus of Patent Document 1 includes a shock absorbing member (impact absorbing member) interposed between a ball joint member (large diameter portion) and a rack housing. The impact absorbing member receives the impact from the large diameter portion and absorbs the impact impact by the elastic member when the large diameter portion tries to collide toward the housing. The impact absorbing member has a flange-like stopper member (impact receiving member) which contacts the large diameter portion and receives a collision impact.

特開２０１５−６３１５７号公報JP, 2015-63157, A

しかしながら、特許文献１に開示の衝撃吸収部材は、フランジ状のストッパ部材において大径部からの衝撃を受け、軸線方向に沿って変位しながら衝撃を吸収するので、ストッパ部材とハウジングの内周面との間に所定の径方向の隙間を必要とする。また、衝撃吸収部材は、ストレート状のハウジングに挿入され、弾性体本体部の径方向に凸設された保持部（片）をハウジングの内周面と所定の部材との間に弾装させて固定される。ストッパ部材は、弾性体本体部の固定保持部と軸線方向に沿って反対側に一体化される。よって車体の振動によって、弾性体本体部が固定保持部を支点に振動して、ストッパ部材がハウジングの内周面に衝突することによる接触音が発生する場合がある。   However, since the impact absorbing member disclosed in Patent Document 1 receives an impact from the large diameter portion in the flange-like stopper member and absorbs the impact while being displaced along the axial direction, the inner peripheral surfaces of the stopper member and the housing And a predetermined radial gap between them. Further, the shock absorbing member is inserted into the straight housing, and the holding portion (piece) convexly provided in the radial direction of the elastic body main portion is resiliently mounted between the inner peripheral surface of the housing and the predetermined member. It is fixed. The stopper member is integrated on the opposite side along the axial direction with the fixing and holding portion of the elastic body main portion. Therefore, due to the vibration of the vehicle body, the elastic body main body portion may vibrate with the fixed holding portion as a fulcrum, and a contact noise may be generated due to the stopper member colliding with the inner peripheral surface of the housing.

本発明は、上記問題に鑑みてなされた発明であり、ダンパ装置の部材間の特に径方向の接触に起因して発生する接触音を低減するダンパ装置及びステアリング装置を提供することを目的とする。   The present invention is an invention made in view of the above problems, and it is an object of the present invention to provide a damper device and a steering device that reduce the contact noise generated due to the contact in particular in the radial direction between members of the damper device. .

本発明のダンパ装置は、軸部及び大径部を備えるシャフトと、筒状に形成され、前記シャフトを軸線方向に相対移動可能に挿通し、前記大径部の端面に対して軸線方向に対向する規制面を備えるハウジングと、前記軸部に挿通され、前記大径部の端面と前記規制面との軸線方向の間に介装される衝撃吸収部材と、を備えるダンパ装置であって、前記衝撃吸収部材は、前記大径部の端面に接触可能な円環部を備える衝撃受部材と、前記規制面と前記円環部との間に配置され、前記ハウジングの内周面に対して径方向隙間を有し且つ前記ハウジングに保持されるゴム材料又はゴム状弾性を有する合成樹脂材料で成形される弾性体と、前記円環部の外周面に全周に亘って接着され、前記ハウジングの内周面に対して径方向隙間を有して配置され、ゴム材料又はゴム状弾性を有する合成樹脂材料で成形される弾性膜と、を備える。   The damper device of the present invention is formed in a cylindrical shape with a shaft having a shaft portion and a large diameter portion, and the shaft is inserted so as to be relatively movable in the axial direction, and axially opposed to the end face of the large diameter portion A damper device comprising: a housing having a restriction surface; and an impact absorbing member inserted into the shaft and interposed between an end face of the large diameter portion and the restriction surface in the axial direction, The impact absorbing member is disposed between an impact receiving member including an annular portion capable of contacting the end face of the large diameter portion, the restriction surface and the annular portion, and a diameter with respect to the inner circumferential surface of the housing. An elastic body formed of a rubber material or a synthetic resin material having rubber-like elasticity which has a directional gap and is held in the housing, and is adhered to the entire outer peripheral surface of the annular portion, It is disposed with a radial gap to the inner circumferential surface, and And a resilient membrane which is molded from a material or synthetic resin material having rubber-like elasticity.

また、本発明のステアリング装置は、本発明のダンパ装置を備え、両端部がタイロッドを介して転舵輪に連結されると共に軸線方向に往復移動して前記転舵輪を転舵する転舵シャフトであり、前記タイロッドに揺動可能に連結される前記大径部を備える前記シャフトと、前記転舵シャフトを収容する前記ハウジングと、前記衝撃吸収部材と、を備える。   A steering apparatus according to the present invention is a steering shaft provided with the damper apparatus according to the present invention, having both ends connected to the steered wheels via tie rods and reciprocating in the axial direction to steer the steered wheels. The shaft includes the large-diameter portion that is swingably connected to the tie rod, the housing that accommodates the steered shaft, and the shock absorbing member.

本発明のダンパ装置又はステアリング装置によれば、円環部が、ハウジングの内周面に対して、弾性膜を介して配置される。車両の振動等によって円環部が径方向に変位した場合に、円環部がハウジングに接触するのではなく、弾性膜がハウジングに接触する。従って、弾性膜がハウジングに接触することで、接触音を低減できる。   According to the damper device or the steering device of the present invention, the annular portion is disposed with respect to the inner peripheral surface of the housing via the elastic film. When the annular portion is displaced in the radial direction due to vibration of the vehicle or the like, the elastic film contacts the housing instead of contacting the housing. Therefore, the contact noise can be reduced by the elastic membrane contacting the housing.

本明細書において弾性体及び弾性膜は、一般的に定義される「ゴム状弾性」を発現する材料素材で成形された部材を示し、その限りにおいて限定されない。弾性体及び弾性膜としては、ゴム材料又はゴム状弾性を有する合成樹脂材料を好適に用いることができる。   In the present specification, the elastic body and the elastic film refer to a member formed of a material material that exhibits "rubber-like elasticity" as generally defined, and is not limited in this respect. As the elastic body and the elastic film, a rubber material or a synthetic resin material having rubber-like elasticity can be suitably used.

本実施形態のステアリング装置を示す概略図である。It is a schematic diagram showing a steering device of this embodiment. 本実施形態のダンパ装置を示す断面図である。It is a sectional view showing a damper device of this embodiment. 図２の衝撃吸収部材の部分断面を示す斜視図である。It is a perspective view which shows the partial cross section of the impact-absorbing member of FIG. 弾性膜の接触部を拡大して示す部分断面図である。It is a fragmentary sectional view expanding and showing a contact portion of an elastic membrane. 衝撃吸収部材の円環部を拡大して示す部分断面図である。It is a fragmentary sectional view expanding and showing a ring part of an impact absorption member. 「エンド当て」前後のダンパ装置を説明する断面図である。It is sectional drawing explaining the damper apparatus before and behind "end reliance." 変形例のダンパ装置に係る弾性膜の接触部を拡大して示す部分断面図である。It is a fragmentary sectional view expanding and showing a contact portion of an elastic membrane concerning a damper device of a modification.

以下、本発明のダンパ装置について、このダンパ装置を用いた本発明のステアリング装置の具体的な実施形態に基づいて、図面を参照しつつ説明する。なお、本発明のステアリング装置は、電動パワーステアリング装置、後輪操舵装置、ステアバイワイヤ装置などに適用できる。図１において、ステアリング装置ＳＴは、操舵機構１０、転舵機構２０、及びダンパ装置５０を有する。   Hereinafter, a damper device of the present invention will be described based on a specific embodiment of a steering device of the present invention using the damper device, with reference to the drawings. The steering device of the present invention can be applied to an electric power steering device, a rear wheel steering device, a steer-by-wire device, and the like. In FIG. 1, the steering device ST includes a steering mechanism 10, a steering mechanism 20, and a damper device 50.

（１．ステアリング装置の構成）
図１に示したとおり、操舵機構１０は、ステアリングホイール１１、及びステアリングシャフト１２を備える。ステアリングホイール１１は、ステアリングシャフト１２の端部に固定される。ステアリングシャフト１２は、転舵輪２６を転舵するために、ステアリングホイール１１に加えられる操舵トルクを伝達する。ステアリングシャフト１２は、コラム軸１３、中間軸１４、及びピニオン軸１５を連結して構成される。ピニオン軸１５は、入力シャフト１５ａ、出力シャフト１５ｂ、及びトーションバー１５ｃを有する。入力シャフト１５ａの入力側部分には、中間軸１４の出力側部分が接続され、出力シャフト１５ｂの出力側部分には、ピニオン歯１５ｄが形成される。 (1. Configuration of steering device)
As shown in FIG. 1, the steering mechanism 10 includes a steering wheel 11 and a steering shaft 12. The steering wheel 11 is fixed to the end of the steering shaft 12. The steering shaft 12 transmits a steering torque applied to the steering wheel 11 in order to steer the steered wheels 26. The steering shaft 12 is configured by connecting the column shaft 13, the intermediate shaft 14, and the pinion shaft 15. The pinion shaft 15 has an input shaft 15a, an output shaft 15b, and a torsion bar 15c. The output side portion of the intermediate shaft 14 is connected to the input side portion of the input shaft 15a, and pinion teeth 15d are formed on the output side portion of the output shaft 15b.

転舵機構２０は、転舵シャフト２１、及び略円筒状に形成されたハウジング２２を有する。転舵シャフト２１は、軸線方向Ａに沿って直線往復移動可能にハウジング２２に収容されて支持される。以下の説明において、この転舵シャフト２１の軸線方向に沿った方向を単に「Ａ軸方向（図１参照）」とも称する。ハウジング２２は、第１ハウジング２２ａと、第１ハウジング２２ａ（の図１中、軸線方向Ａの左側）に固定された第２ハウジング２２ｂとを備える。   The steering mechanism 20 has a steering shaft 21 and a housing 22 formed in a substantially cylindrical shape. The steering shaft 21 is accommodated in and supported by the housing 22 so as to be linearly reciprocable along the axial direction A. In the following description, the direction along the axial direction of the steered shaft 21 is also simply referred to as “A-axis direction (see FIG. 1)”. The housing 22 includes a first housing 22a and a second housing 22b fixed to the first housing 22a (on the left side in the axial direction A in FIG. 1).

また、ピニオン軸１５は、第１ハウジング２２ａ内において回転可能に支持される。転舵シャフト２１には、ラック歯２１ａが形成され、ラック歯２１ａ及びピニオン歯１５ｄは、互いに噛合されて、ラックアンドピニオン機構２３を構成する。第１ハウジング２２ａには、ラックアンドピニオン機構２３が収容される。   The pinion shaft 15 is rotatably supported in the first housing 22a. Rack teeth 21 a are formed on the steering shaft 21, and the rack teeth 21 a and the pinion teeth 15 d are engaged with each other to constitute a rack and pinion mechanism 23. The rack and pinion mechanism 23 is accommodated in the first housing 22a.

転舵シャフト２１は、軸部２１１の両端部に大径部５１，５１を有する。大径部５１，５１は、転舵シャフト２１の両端の軸部２１１が拡径されて形成される。大径部５１には、ボールスタッド２７が収容されており、ボールジョイントを形成する。ボールスタッド２７，２７の両端部には、タイロッド２４，２４が連結され、タイロッド２４，２４の先端は、転舵輪２６が組み付けられたナックルに連結される。これにより、ステアリングホイール１１が操舵されると、その操舵トルクがステアリングシャフト１２に伝達され、ピニオン軸１５が回転される。ピニオン軸１５の回転は、ピニオン歯１５ｄ及びラック歯２１ａによって、転舵シャフト２１の直線往復移動に変換される。そして、このＡ軸方向に沿った移動がタイロッド２４，２４を介してナックルに伝達されることにより、転舵輪２６，２６が転舵され、車両の進行方向が変更される。なお、符号２５は、ハウジング２２の内部を含む転舵機構２０の収容空間の気密性を保つためのブーツである。   The steering shaft 21 has large diameter portions 51 and 51 at both ends of the shaft portion 211. The large diameter portions 51, 51 are formed by expanding the shaft portions 211 at both ends of the steered shaft 21. The large diameter portion 51 accommodates a ball stud 27 and forms a ball joint. Tie rods 24, 24 are connected to both ends of the ball studs 27, 27, and tip ends of the tie rods 24, 24 are connected to a knuckle in which the steered wheels 26 are assembled. Thus, when the steering wheel 11 is steered, the steering torque is transmitted to the steering shaft 12 and the pinion shaft 15 is rotated. The rotation of the pinion shaft 15 is converted into linear reciprocating movement of the steered shaft 21 by the pinion teeth 15 d and the rack teeth 21 a. Then, the movement along the A-axis direction is transmitted to the knuckle through the tie rods 24, 24, whereby the steered wheels 26, 26 are steered, and the traveling direction of the vehicle is changed. In addition, the code | symbol 25 is a boot for maintaining the airtightness of the accommodation space of the steering mechanism 20 containing the inside of the housing 22. As shown in FIG.

ハウジング２２の両端部には、後述する衝撃吸収部材５３，５３が設けられる。衝撃吸収部材５３，５３は、第１ハウジング２２ａの一方側端部と第２ハウジング２２ｂの他方側端部に形成される大径部用ハウジング５２，５２に収容され、その規制面５２ｂ，５２ｂに装着される（図２参照）。衝撃吸収部材５３，５３は、転舵シャフト２１の直線移動を停止するための大径部５１，５１と対向するように、大径部５１，５１と規制面５２ｂ，５２ｂとの間に介装される。そして、転舵シャフト２１が軸線方向Ａに移動し、転舵輪２６，２６が最大操舵角に達した場合、大径部５１が、衝撃吸収部材５３に衝突する「エンド当て」が生じる。衝撃吸収部材５３は、このときの衝突の衝撃を吸収する。   At both ends of the housing 22, shock absorbing members 53, 53 described later are provided. The impact absorbing members 53, 53 are accommodated in the large diameter portion housings 52, 52 formed at one end of the first housing 22a and the other end of the second housing 22b, and the restricting surfaces 52b, 52b are provided. It is attached (see FIG. 2). The impact absorbing members 53, 53 are interposed between the large diameter portions 51, 51 and the restriction surfaces 52b, 52b so as to face the large diameter portions 51, 51 for stopping the linear movement of the steering shaft 21. Be done. Then, when the steered shaft 21 moves in the axial direction A and the steered wheels 26, 26 reach the maximum steering angle, an “end contact” occurs in which the large diameter portion 51 collides with the impact absorbing member 53. The shock absorbing member 53 absorbs the impact of the collision at this time.

（２．ダンパ装置）
上述したダンパ装置５０について、図２、３を用いて更に説明する。ダンパ装置５０は、運転者の操舵に伴う正入力、又は車両の外部から転舵輪２６を介して逆入力が転舵シャフト２１に入力されるのに伴って、大径部５１が大径部用ハウジング５２の規制面５２ｂに衝突しようとする際の衝撃を、衝撃吸収部材５３によって衝撃吸収するための装置である。図２に示すとおり、ダンパ装置５０は、転舵シャフト２１と、大径部用ハウジング５２と、衝撃吸収部材５３と、を備える。 (2. Damper device)
The above-described damper device 50 will be further described with reference to FIGS. In the damper device 50, the large-diameter portion 51 is for the large-diameter portion as the reverse input is input to the steered shaft 21 from the outside of the vehicle via the steered wheel 26 or the positive input accompanying the driver's steering. The shock absorbing member 53 is a device for absorbing the shock when trying to collide with the control surface 52 b of the housing 52. As shown in FIG. 2, the damper device 50 includes a steered shaft 21, a large diameter portion housing 52, and an impact absorbing member 53.

なお、実施形態のダンパ装置５０は、ステアリング装置ＳＴの軸線方向Ａの左右両側２カ所において装着されている。以下の説明において、図１中、軸線方向Ａに沿った右側を「一方」側、左側を「他方」側とし、特に断りが無ければ、２カ所に装着されるダンパ装置５０のうち他方側のダンパ装置５０の構成について、主に説明する。   The damper device 50 according to the embodiment is mounted at two positions on the left and right sides in the axial direction A of the steering device ST. In the following description, in FIG. 1, the right side along the axial direction A is “one side” and the left side is the “other side”, and unless otherwise noted, the other side of the damper devices 50 mounted at two places The configuration of the damper device 50 will be mainly described.

転舵シャフト２１は、軸部２１１及び該軸部２１１と接続する大径部５１を備える。転舵シャフト２１は、大径部５１を介して軸線方向Ａに沿った一方側において、ラック歯２１ａが形成された軸部２１１を接続すると共に、他方側において、ボールスタッド２７の軸部を連結する。   The steering shaft 21 includes a shaft portion 211 and a large diameter portion 51 connected to the shaft portion 211. The steered shaft 21 connects the shaft portion 211 formed with the rack teeth 21a on one side along the axial direction A via the large diameter portion 51, and connects the shaft portion of the ball stud 27 on the other side. Do.

大径部５１は、自身の軸線方向Ａの一方側端部５１１において転舵シャフト２１と接続し、大径部５１の一方側端部５１１が、転舵シャフト２１の軸部２１１よりも大径に形成される。転舵シャフト２１の軸部２１１の端面２１２には、軸線方向Ａの他方側に開口する雌ねじ部２１３が形成される。大径部５１の一方側端部５１１には、雌ねじ部２１３と螺合する雄ねじ部５１ｂが形成される。雄ねじ部５１ｂは、軸線方向Ａに沿って一方側に突出される。雄ねじ部５１ｂが雌ねじ部２１３に螺合されることにより、転舵シャフト２１に対して大径部５１の他方側にボールスタッド２７を連結可能になる。   The large diameter portion 51 is connected to the steered shaft 21 at one end 511 in the axial direction A of the large diameter portion 51, and the one end 511 of the large diameter portion 51 is larger in diameter than the shaft 211 of the steered shaft 21. Is formed. At an end surface 212 of the shaft portion 211 of the steering shaft 21, a female screw portion 213 opened on the other side in the axial direction A is formed. At one end portion 511 of the large diameter portion 51, a male screw portion 51b to be screwed with the female screw portion 213 is formed. The male screw portion 51 b is protruded to one side along the axial direction A. By screwing the male screw portion 51 b to the female screw portion 213, the ball stud 27 can be connected to the other side of the large diameter portion 51 with respect to the steered shaft 21.

また、雄ねじ部５１ｂの根元には、転舵シャフト２１の端面２１２、すなわち軸部２１１の終端が当接する大径部の当接端面５１ａが形成される。当接端面５１ａは、雄ねじ部５１ｂの根元から径方向に形成される。本実施形態では、当接端面５１ａが転舵シャフト２１の終端に相当し、いわゆるラックエンドになり、（衝撃吸収部材５３が装着されない状態では）当接端面５１ａにおいて規制面５２ｂに係止可能となり、転舵シャフト２１が直線往復移動する際のストッパを担う。   Further, at the root of the male screw portion 51b, an end surface 212 of the steered shaft 21, that is, an abutting end surface 51a of a large diameter portion with which the end of the shaft portion 211 abuts is formed. The abutting end surface 51a is formed in the radial direction from the root of the male screw portion 51b. In the present embodiment, the contact end surface 51a corresponds to the end of the steering shaft 21 and is a so-called rack end, and can be locked to the control surface 52b at the contact end surface 51a (when the shock absorbing member 53 is not attached) The steering shaft 21 bears a stopper when it linearly reciprocates.

大径部５１は、他方側の端部においてボールスタッド２７を連結し、ボールスタッド２７、タイロッド２４、及びナックルを介して転舵輪２６を連結する（図１参照）。ボールスタッド２７の他方側にはその軸部が形成され、この軸部の端部と、転舵輪２６を連結するナックルとが、タイロッド２４を介して連結される。これにより、転舵シャフト２１が軸線方向Ａに直線移動することによって、大径部５１に装着されるボール部２７ｂを回動中心としてタイロッド２４が揺動され、当接端面５１ａが規制面５２ｂに装着された衝撃吸収部材５３に係止するまで、転舵輪２６が転舵される。   The large diameter portion 51 connects the ball stud 27 at the other end, and connects the steered wheels 26 via the ball stud 27, the tie rod 24, and the knuckle (see FIG. 1). A shaft portion is formed on the other side of the ball stud 27, and an end portion of the shaft portion and a knuckle connecting the steered wheels 26 are connected via a tie rod 24. As a result, when the steered shaft 21 linearly moves in the axial direction A, the tie rod 24 is swung with the ball portion 27b mounted on the large diameter portion 51 as the rotation center, and the contact end surface 51a is the control surface 52b. The steered wheels 26 are steered until the impact absorbing member 53 is engaged.

大径部用ハウジング５２は、筒状に形成され、転舵シャフト２１を軸線方向Ａに相対移動可能に挿通し、大径部５１の当接端面５１ａに対して軸線方向Ａに対向する規制面５２ｂを備える。   The large diameter portion housing 52 is formed in a cylindrical shape, and the steering shaft 21 is inserted in the axial direction A so as to be able to move relative to the axial direction A, and a restricting surface facing the contact end surface 51 a of the large diameter portion 51 in the axial direction A 52b is provided.

大径部用ハウジング５２は、第１及び第２の各ハウジング２２ａ、２２ｂの一方及び他方側の端部に接続されるハウジング２２の一部分であり、軸線方向Ａに沿って転舵輪２６が配置される側に開口する略有底円筒状に形成される。大径部用ハウジング５２の内部には、転舵シャフト２１の軸部２１１を挿通状態で収容するシャフト収容部５２ｅと、軸線方向Ａに沿って外側に開口し、軸部２１１及び大径部５１を収容可能な大径部収容部５２ａが形成される。大径部収容部５２ａは内径がほぼ一定に維持されるように形成されており、その底壁を形成する底面が、大径部５１の当接端面５１ａと対向する規制面５２ｂを形成する。規制面５２ｂは、転舵シャフト２１の終端となる当接端面５１ａを衝撃吸収部材５３を介して当接させて、その直線移動範囲を物理的に規制する面である。   The large diameter portion housing 52 is a part of the housing 22 connected to one end and the other end of each of the first and second housings 22a and 22b, and the steered wheels 26 are disposed along the axial direction A. It is formed in a substantially bottomed cylindrical shape that opens on the A shaft accommodating portion 52e for accommodating the shaft portion 211 of the steered shaft 21 in an inserted state inside the large diameter portion housing 52, and an outside opening along the axial direction A, and the shaft portion 211 and the large diameter portion 51 A large diameter portion accommodating portion 52a that can accommodate the The large diameter portion accommodating portion 52a is formed so that the inner diameter is maintained substantially constant, and the bottom surface forming the bottom wall forms a regulating surface 52b opposed to the abutting end surface 51a of the large diameter portion 51. The restricting surface 52b abuts on the abutting end surface 51a, which is the terminal end of the steering shaft 21, via the shock absorbing member 53, and physically restricts the linear movement range.

また、大径部用ハウジングの内周面５２ｃの一部分であって、規制面５２ｂから立設する底方の角部には、規制面５２ｂと面一状をなすように、径方向外方に向けて凹設される環状の凹状係止部５２ｄが形成される。弾性体５３ｂの凸状係止部５３６と嵌合することにより、衝撃吸収部材５３を規制面５２ｂに装着するための凹部である。   In addition, a part of the inner peripheral surface 52c of the large diameter portion housing, at the corner at the bottom facing from the restricting surface 52b, is radially outward so as to be flush with the restricting surface 52b. An annular concave locking portion 52d which is recessed toward the end is formed. By fitting with the convex locking portion 536 of the elastic body 53b, it is a recess for mounting the shock absorbing member 53 on the control surface 52b.

（３．衝撃吸収部材）
衝撃吸収部材５３は、大径部用ハウジング５２に収容された状態で軸部２１１に挿通され、大径部５１の当接端面５１ａと規制面５２ｂの軸線方向Ａの間に介装される。衝撃吸収部材５３は、エンド当て時の衝突衝撃を吸収する部材であり、この衝撃を受ける衝撃受部材５３ａと、衝撃を吸収する弾性体５３ｂと、後述する弾性膜５３５ａを備える。 (3. Shock absorbing member)
The impact absorbing member 53 is inserted into the shaft portion 211 in a state of being accommodated in the large diameter portion housing 52, and interposed between the abutting end surface 51a of the large diameter portion 51 and the axial direction A of the restriction surface 52b. The impact absorbing member 53 is a member that absorbs a collision impact at the time of end contact, and includes an impact receiving member 53a that receives the impact, an elastic body 53b that absorbs the impact, and an elastic film 535a described later.

より具体的には、衝撃吸収部材５３は、円環部５３２を有するプレート筒状の鉄製の衝撃受部材５３ａと、略円筒形状をなす弾性体５３ｂとを備える。図３に示すように、衝撃吸収部材５３は、弾性体５３ｂの貫通孔に衝撃受部材５３ａの筒部５３１を挿入した、略円環柱状の全体形状をなす。衝撃吸収部材５３は、弾性体５３ｂの他方側端面５３３ａ及び弾性膜５３５ａを円環部５３２に接着して一体化される。衝撃吸収部材５３は、衝撃受部材５３ａの他方側の被当接端面５３２ａが大径部５１の当接端面５１ａと対向配置するように、大径部用ハウジング５２の規制面５２ｂに装着される。   More specifically, the impact absorbing member 53 includes a plate cylindrical iron impact receiving member 53a having an annular portion 532 and an elastic body 53b having a substantially cylindrical shape. As shown in FIG. 3, the impact absorbing member 53 has a substantially annular columnar overall shape in which the cylindrical portion 531 of the impact receiving member 53 a is inserted into the through hole of the elastic body 53 b. The impact absorbing member 53 is integrated by bonding the other side end surface 533 a of the elastic body 53 b and the elastic film 535 a to the annular portion 532. The impact absorbing member 53 is mounted on the restricting surface 52b of the large diameter portion housing 52 so that the other abutted end surface 532a of the impact receiving member 53a faces the abutting end surface 51a of the large diameter portion 51. .

衝撃受部材５３ａは、筒部５３１、及び、筒部５３１から径方向外方に延在し、大径部用ハウジング５２の規制面５２ｂに対向し、大径部５１の当接端面５１ａに接触可能な円環部５３２を備える。衝撃受部材５３ａは、軸線方向Ａに沿った断面視がＬ字をなしており、筒部５３１は、略Ｌ字の軸線方向Ａに沿った１辺をなし、円環部５３２は、軸線方向Ａと垂直方向に沿った他の１辺をなす。衝撃受部材５３ａは、円環部５３２において大径部５１の当接端面５１ａから当接ないし衝突による衝撃力を受け、弾性体５３ｂに圧縮力を加えながら衝撃を伝えて減衰させる部材である。   The impact receiving member 53 a extends radially outward from the cylindrical portion 531 and the cylindrical portion 531, faces the restriction surface 52 b of the large diameter portion housing 52, and contacts the abutting end surface 51 a of the large diameter portion 51. A possible annular part 532 is provided. The impact receiving member 53a has an L shape in a sectional view along the axial direction A, and the cylindrical portion 531 forms one side along the axial direction A of the substantially L shape, and the annular portion 532 has an axial direction Make one other side perpendicular to A. The impact receiving member 53a is a member that receives an impact force due to contact or collision from the abutting end surface 51a of the large diameter portion 51 in the annular portion 532 and transmits and attenuates an impact while applying a compressive force to the elastic body 53b.

筒部５３１は、ほぼストレート状の円筒形状をなす。筒部５３１の内周面５３１ａは、大径部用ハウジング５２に取付けられた状態で、軸部２１１を挿通するための衝撃吸収部材５３の貫通孔を形成する。筒部５３１の外周面５３１ｂは、弾性体５３ｂの内周面５３４を緩挿可能な外径に形成される。軸線方向Ａに沿った筒部５３１の全長は、後述する衝撃吸収部材５３の圧縮代Ｘに対応して形成される。筒部５３１は、弾性体５３ｂの内周面５３４の弾性変形方向を、軸線方向Ａに沿うように規制するための部位であり、弾性体５３ｂが、筒部５３１を超えて径方向内方にはみ出し変形するのを防止する。   The cylindrical portion 531 has a substantially straight cylindrical shape. The inner peripheral surface 531a of the cylindrical portion 531 forms a through hole of the shock absorbing member 53 for inserting the shaft portion 211 in a state of being attached to the large diameter portion housing 52. The outer peripheral surface 531 b of the cylindrical portion 531 is formed to have an outer diameter that allows the inner peripheral surface 534 of the elastic body 53 b to be loosely inserted. The entire length of the cylindrical portion 531 along the axial direction A is formed to correspond to the compression margin X of the shock absorbing member 53 described later. The cylindrical portion 531 is a portion for restricting the elastic deformation direction of the inner circumferential surface 534 of the elastic body 53b along the axial direction A, and the elastic body 53b extends radially inward beyond the cylindrical portion 531. Prevents over deformation.

円環部５３２は、筒部５３１から径方向外方に延在する円環板状をなす。その円環の他方側の表面（端面）は、大径部５１に接触可能な一様な平面状の被当接端面５３２ａをなす。その円環の外周面５３２ｄの一方（規制面）側の角部５３２ｃは、規制面５２ｂに向かって縮径するように形成される（図５等参照）。角部５３２ｃは、軸線方向Ａに沿った断面視において円弧凸状（以下「Ｒ形状」とも記す）をなすように、径方向内方に向けて漸次に縮径される。円環部５３２は、円環のうち径方向外方に配置する３分の１程度の部位において、被当接端面５３２ａの裏面５３２ｂの側が傾斜状をなすように、径方向外方に向けて徐々に滑らかな薄肉状をなす。よって、図４及び図５に示すように、円環部５３２の外周縁部は、裏面５３２ｂから先細に連続形成される外周面５３２ｄ（端面）をなす。円環部５３２の外径は、大径部用ハウジング５２の内周面５２ｃの内径と、円環部の外周面５３２ｄとの隙間が小さくなるように形成される。また、円環部の裏面５３２ｂには、弾性体５３ｂの他方側端面５３３ａが接着される。円環部の外周面５３２ｄには、他方側端面５３３ａと連続形成され、弾性体の外周面５３５の他方側の角部をなすように形成された弾性膜５３５ａが接着される。ゴム材料であれば加硫接着できる。接着は、接触可能な裏面５３２ｂ及び外周面５３２ｄの全面において行う。   The annular portion 532 has an annular plate shape extending radially outward from the cylindrical portion 531. The surface (end surface) on the other side of the annular ring forms a uniform planar abutted end surface 532 a that can contact the large diameter portion 51. The corner 532c on one (regulating surface) side of the outer circumferential surface 532d of the annular ring is formed so as to reduce in diameter toward the regulating surface 52b (see FIG. 5 and the like). The corner portion 532c is gradually reduced in diameter radially inward so as to have a convex shape of an arc (hereinafter also referred to as “R shape”) in a cross sectional view along the axial direction A. The annular portion 532 is directed radially outward so that the side of the back surface 532b of the abutted end surface 532a is inclined at a part of about one third of the annular ring disposed radially outward. Gradually smooth and thin. Therefore, as shown in FIGS. 4 and 5, the outer peripheral edge portion of the annular portion 532 forms an outer peripheral surface 532 d (end surface) which is continuously formed to be tapered from the back surface 532 b. The outer diameter of the annular portion 532 is formed such that the gap between the inner diameter of the inner circumferential surface 52c of the large diameter portion housing 52 and the outer circumferential surface 532d of the annular portion is small. The other side end face 533a of the elastic body 53b is adhered to the back surface 532b of the annular portion. An elastic film 535a, which is formed continuously with the other side end surface 533a and forms the other corner of the outer peripheral surface 535 of the elastic body, is adhered to the outer peripheral surface 532d of the annular portion. The rubber material can be vulcanized and bonded. The bonding is performed on the entire surface of the back surface 532 b and the outer peripheral surface 532 d which can be contacted.

次に、弾性体５３ｂについて説明する。以下の弾性体の説明において、特に断りが無ければ、無変形状態の弾性体５３ｂについて説明する。弾性体５３ｂは、外周面５３５の軸線方向Ａの中央部においてくびれた凹部５３５ｃが形成された略鼓筒状の本体部５３ｃに、軸線方向Ａの一方側端部においてフランジ状の凸状係止部５３６が径方向外方に凸設された全体形状を形成する。弾性体５３ｂの本体部５３ｃは、規制面５２ｂから径方向外方に延在されたハウジングの凹状係止部５２ｄに凸状係止部５３６を嵌合させ、且つハウジングの内周面５２ｃに対して径方向隙間Ｓ１を有する状態で、大径部用ハウジング５２の内周面５２ｃ、規制面５２ｂ、筒部の外周面５３１ｂ及び円環部５３２により形成される初期空間Ｓ０内に配置される。 Next, the elastic body 53b will be described. In the following description of the elastic body, the elastic body 53b in the non-deformed state will be described unless otherwise noted. The elastic body 53b is a flange-like convex engagement at one end in the axial direction A with the substantially drum-shaped main body 53c in which the recessed portion 535c which is narrowed at the central portion in the axial direction A of the outer peripheral surface 535 is formed. The portion 536 forms an overall shape which is provided so as to project radially outward. The main body portion 53c of the elastic body 53b fits the convex locking portion 536 to the concave locking portion 52d of the housing extending radially outward from the regulating surface 52b, and with respect to the inner circumferential surface 52c of the housing Te in a state having a radial clearance S 1, the inner peripheral surface 52c of the large-diameter portion housing 52, is arranged on the regulating surface 52 b, the initial space S in 0 which is formed by the outer peripheral surface 531b and the annular portion 532 of the cylindrical portion Ru.

弾性体５３ｂは、円環部５３２の角部５３２ｃ及び外周面５３２ｄに全周に亘って接着され、ハウジングの内周面５２ｃに対して径方向隙間を有して配置される弾性膜５３５ａと一体的に形成される。外周面５３２ｄを覆う弾性膜５３５ａとハウジングの内周面５２ｃとの間でなす径方向隙間Ｇは、本体部５３ｃとハウジングの内周面５２ｃとがなす径方向隙間Ｓ１のうち最小隙間に相当する。以下の説明において、弾性膜５３５ａを弾性体５３ｂの一部分（弾性体の外周面５３５の他方側をなす角部分）として記載する。 The elastic body 53b is bonded to the corner 532c and the outer peripheral surface 532d of the annular portion 532 over the entire circumference, and is integral with the elastic film 535a disposed with a radial gap with respect to the inner peripheral surface 52c of the housing. Are formed. Radial gap G which forms between the inner circumferential surface 52c of the elastic film 535a and a housing covering the outer peripheral surface 532d is equivalent to the minimum gap of the radial clearance S 1 formed between the inner peripheral surface 52c of the main body portion 53c and the housing Do. In the following description, the elastic film 535a will be described as a part of the elastic body 53b (an angle portion forming the other side of the outer peripheral surface 535 of the elastic body).

弾性体５３ｂの他方側端面５３３ａは、円環部５３２の裏面５３２ｂに（加硫）接着される。接着部５３３ｃは、最大限の接着面積を確保するように、円環部の裏面５３２ｂの全面に形成され、円環部の角部５３２ｃから外周面５３２ｄに沿っても同様に連続して形成される。よって、他方側端面５３３ａの径方向外方側は、角部５３２ｃのＲ形状に沿って曲面をなしながら円環部の外周面５３２ｄを連続的に覆う。弾性膜５３５ａは、弾性体の他方側端面５３３ａと外周面５３５とがなす角部であり、主に円環部の角部５３２ｃ及び外周面５３２ｄに沿った近傍部位である。他方側端面５３３ａは、外周面５３２ｄを覆う弾性膜５３５ａの内周面に連続するように形成される。ハウジングの内周面５２ｃに対向する弾性膜５３５ａの径方向の膜厚は、円環部の外周面５３２ｄを覆う部分で最も薄く膜厚Ｔとなり、外周面５３２ｄから規制面５２ｂに向けて角部５３２ｃをなす終点（Ｒ状曲面をなす始点（図５中に符号Ｒ０で示す））に至るまで徐々厚くなるように形成される。 The other side end surface 533 a of the elastic body 53 b is adhered (cured) to the back surface 532 b of the annular portion 532. The adhesion portion 533c is formed on the entire surface of the back surface 532b of the annular portion so as to secure the maximum adhesion area, and is similarly formed continuously from the corner portion 532c of the annular portion to the outer peripheral surface 532d. Ru. Accordingly, the radially outer side of the other side end surface 533a continuously covers the outer peripheral surface 532d of the annular portion while forming a curved surface along the R shape of the corner 532c. The elastic film 535a is a corner formed by the other side end surface 533a of the elastic body and the outer peripheral surface 535, and is a vicinity portion mainly along the corner 532c of the annular portion and the outer peripheral surface 532d. The other side end surface 533a is formed to be continuous with the inner peripheral surface of the elastic film 535a covering the outer peripheral surface 532d. The film thickness in the radial direction of the elastic film 535a opposed to the inner peripheral surface 52c of the housing is the thinnest film thickness T in the portion covering the outer peripheral surface 532d of the annular portion, and the corner portion from the outer peripheral surface 532d toward the control surface 52b It is formed so as to be gradually thicker up to the end point 532c (the start point (indicated by symbol R0 in FIG. 5) forming the R-shaped curved surface).

図４に示すように、円環部の外周面５３２ｄを覆う弾性膜５３５ａが最も薄い部位での膜厚Ｔは、０．３〔ｍｍ〕程度である（接着部５３３ｃを含む）。また、弾性膜５３５ａとハウジングの内周面５２ｃとの間で両者が最も近接する径方向隙間Ｇは、０．１５〜０．６〔ｍｍ〕程度である。なお、加硫接着であれば、円環部の裏面５３２ｂ及び外周面５３２ｄに所定の接着剤を適用し、金型内に露出する裏面５３２ｂ及び外周面５３２ｄに向けて未加硫ゴムを射出した後に加硫し、成形することにより行われる。   As shown in FIG. 4, the film thickness T at a portion where the elastic film 535 a covering the outer peripheral surface 532 d of the annular portion is the thinnest is approximately 0.3 [mm] (including the bonding portion 533 c). Further, the radial gap G where the both are closest to each other between the elastic film 535 a and the inner circumferential surface 52 c of the housing is about 0.15 to 0.6 [mm]. In the case of vulcanization adhesion, a predetermined adhesive was applied to the back surface 532b and the outer peripheral surface 532d of the annular portion, and the unvulcanized rubber was injected toward the back surface 532b and the outer peripheral surface 532d exposed in the mold. It is carried out by later curing and molding.

弾性体５３ｂの外周面５３５には、軸線方向Ａの中央部において最もくびれて外径が小さな凹部５３５ｃが形成される。つまり、外周面５３５の外径は、本体部５３ｃ他方側の弾性膜５３５ａがなす角部及び一方側の隅部５３５ｂにおいて大きく形成され、中央部に向けて最小になるように漸次に縮径される。弾性体５３ｂの他方側（弾性膜５３５ａ）の外周面５３５は、接着部５３３ｃを介して円環部の外周面５３２ｄの全周面を覆う。   The outer peripheral surface 535 of the elastic body 53b is formed with a recessed portion 535c having the smallest outer diameter at the central portion in the axial direction A. That is, the outer diameter of the outer peripheral surface 535 is formed large at the corner formed by the elastic film 535a on the other side of the main body portion 53c and the corner 535b on one side, and gradually reduced in diameter toward the central portion. Ru. The outer peripheral surface 535 of the other side (elastic film 535a) of the elastic body 53b covers the entire peripheral surface of the outer peripheral surface 532d of the annular portion through the bonding portion 533c.

また、弾性体５３ｂの内周面５３４は、僅かな隙間を介して筒部５３１に緩挿される。つまり、弾性体５３ｂの内周面５３４は、筒部５３１の外周面５３１ｂに接着されていない。また、弾性体５３ｂの内周面５３４のうち規制面５２ｂに配置する側の角部には、規制面５２ｂに向かって拡径する拡径部５３４ａが形成される。拡径部５３４ａは、筒部５３１の端部５３１ｃより少しだけ円環部５３２側の位置から規制面５２ｂに向かって拡径するように傾斜形成される。これにより、圧縮変形時の本体部５３ｃが開口部５３ｄにおいて咬み込まれないようにできる。   Further, the inner circumferential surface 534 of the elastic body 53b is loosely inserted into the cylindrical portion 531 with a slight gap. That is, the inner circumferential surface 534 of the elastic body 53 b is not bonded to the outer circumferential surface 531 b of the cylindrical portion 531. Further, an enlarged diameter portion 534a whose diameter is increased toward the control surface 52b is formed at a corner of the inner peripheral surface 534 of the elastic body 53b which is disposed on the control surface 52b. The enlarged diameter portion 534a is inclined so as to expand in diameter toward the restriction surface 52b from the position on the annular portion 532 side of the end portion 531c of the cylindrical portion 531. Thereby, the main body portion 53c at the time of compressive deformation can be prevented from being bitten at the opening 53d.

本発明に係る弾性体及び弾性膜は、ゴム状弾性を発現するように成形された部材であれば特に限定されないが、架橋ゴム、熱硬化性又は熱可塑性の合成樹脂系エラストマー等の材料を用いて成形できる。架橋ゴムとしては、天然ゴム、ブタジエンゴム、イソプレンゴム、クロロプレンゴム、スチレン‐ブタジエンゴム、アクリロニトリル‐ブタジエンゴム（以下、ＮＢＲとも記す）等のジエン系ゴム及びこれらの不飽和結合部分に水素添加されたゴム等、熱硬化性合成樹脂系エラストマーとしては、エチレン‐プロピレンゴム等のオレフィン系ゴム、ブチルゴム、アクリルゴム、ウレタンゴム、シリコンゴム、フッ素ゴム等を、熱可塑性合成樹脂系エラストマーとしては、スチレン系、オレフィン系、ポリエステル系、ポリウレタン系、ポリアミド系、塩化ビニル系等のエラストマーを例示できる。
本実施形態では、ステアリング装置ＳＴの大径部用ハウジング５２に装着する衝撃吸収部材５３に用いる弾性体５３ｂ及び弾性膜５３５ａとしては、耐熱性、耐寒性、耐候性の観点から、ＮＢＲ、クロロプレンゴム、ブチルゴム、エチレン‐プロピレンゴム等、更に耐油性の観点から、極性基を有するＮＢＲ、クロロプレンゴム等が好適に用いられる。 The elastic body and the elastic film according to the present invention are not particularly limited as long as they are members molded to exhibit rubbery elasticity, but materials such as crosslinked rubber, thermosetting or thermoplastic synthetic resin elastomer, etc. are used. Can be molded. As crosslinked rubbers, diene rubbers such as natural rubber, butadiene rubber, isoprene rubber, chloroprene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber (hereinafter also referred to as NBR) and hydrogenated to unsaturated bond portions thereof As thermosetting synthetic resin elastomers such as rubber, olefin rubbers such as ethylene-propylene rubber, butyl rubber, acrylic rubber, urethane rubber, silicone rubber, fluororubber, etc. As thermoplastic synthetic resin elastomers, styrene rubber Examples of such elastomers include olefin-based, polyester-based, polyurethane-based, polyamide-based and vinyl chloride-based elastomers.
In the present embodiment, the elastic body 53b and the elastic film 535a used for the impact absorbing member 53 attached to the housing 52 for the large diameter portion of the steering device ST are NBR and chloroprene rubber from the viewpoints of heat resistance, cold resistance and weather resistance. Further, from the viewpoint of oil resistance, butyl rubber, ethylene-propylene rubber and the like, NBR having a polar group, chloroprene rubber and the like are suitably used.

（４．作用説明）
本実施形態に係るダンパ装置５０は、大径部５１が円環部５３２に衝撃力を付与した場合に、弾性体５３ｂが、ハウジングの内周面５２ｃ、筒部の外周面５３１ｂ、規制面５２ｂ及び円環部５３２、の全てに接触した状態に変形し、衝撃受部材５３ａが、規制面５２ｂに対して非接触状態を維持して変形し、弾性体５３ｂによって大径部用ハウジング５２に対する相対移動を規制される構成を有している。ダンパ装置５０は、この構成によって衝撃吸収するための装置であり、以下に説明する。 (4. Function explanation)
In the damper device 50 according to the present embodiment, when the large diameter portion 51 applies an impact force to the annular portion 532, the elastic body 53 b corresponds to the inner peripheral surface 52 c of the housing, the outer peripheral surface 531 b of the cylindrical portion, and the restriction surface 52 b And the annular portion 532 to be in contact with all of them, and the impact receiving member 53a is deformed while maintaining the non-contacting state with respect to the control surface 52b, and the elastic body 53b makes relative to the large diameter portion housing 52 It has a configuration in which movement is restricted. The damper device 50 is a device for absorbing shock with this configuration, and will be described below.

例えば図３に示したような衝撃吸収部材５３が大径部用ハウジング５２内に配置される無変形状態において、弾性体５３ｂの本体部５３ｃは、図６に示すように、大径部用ハウジング５２の内周面５２ｃ、規制面５２ｂ、筒部５３１の外周面５３１ｂ及び円環部５３２により形成される初期空間Ｓ０の内部に配置される。また、図２に示すように、この状態において、弾性体５３ｂ、筒部５３１、ハウジングの内周面５２ｃは、それぞれ転舵シャフト２１の中心軸線Ｃに対して、同心円状に配置される。また、ハウジングの規制面５２ｂ、円環部５３２は、それぞれ転舵シャフト２１の中心軸線Ｃと垂直方向に沿って平行配置される。また、衝撃力を受ける前の無変形状態では、筒部５３１の端部５３１ｃの端面と規制面５２ｂとの間には、軸線方向Ａに沿って、圧縮代Ｘより大きい間隔Ｄの開口部５３ｄが形成されている（図６参照）。 For example, in the undeformed state where the impact absorbing member 53 as shown in FIG. 3 is disposed in the large diameter portion housing 52, the main portion 53c of the elastic body 53b is, as shown in FIG. It is disposed inside the initial space S 0 formed by the inner circumferential surface 52 c 52, the restriction surface 52 b, the outer circumferential surface 531 b of the cylindrical portion 531, and the annular portion 532. Further, as shown in FIG. 2, in this state, the elastic body 53 b, the cylindrical portion 531, and the inner circumferential surface 52 c of the housing are arranged concentrically with respect to the central axis C of the steered shaft 21. Further, the control surface 52b of the housing and the annular portion 532 are disposed in parallel along the direction perpendicular to the central axis C of the steered shaft 21, respectively. Further, in the non-deformed state before receiving the impact force, the opening 53d with a distance D larger than the compression margin X along the axial direction A between the end face of the end 531c of the cylindrical portion 531 and the restricting surface 52b. Are formed (see FIG. 6).

また、上記の無変形状態において、衝撃吸収部材５３は、凸状係止部５３６と凹状係止部５２ｄの嵌合によって、ハウジングの規制面５２ｂに対して固定されている。よって、衝撃吸収部材５３の一方側は、軸線方向Ａ及び径方向に変位しにくくなっている。また、衝撃吸収部材５３の他方側、すなわち規制面５２ｂに対向して大径部５１が配置される側は、衝撃吸収部材５３が軸線方向Ａに圧縮変形、及び径方向に変位可能に配置される。具体的には、規制面５２ｂに装着された弾性体５３ｂの一方側端面５３３ｂを固定支持点として、弾性体５３ｂが有するゴム状弾性に従って軸線方向Ａに圧縮変位可能であり、弾性体５３ｂの剪断剛性に従って径方向隙間Ｓ１を介して径方向に変位可能である。衝撃吸収部材５３の他方側の端部には、円環部５３２が配置する。円環部５３２は、衝撃吸収部材５３において大径部５１からの衝突衝撃を直接に受ける接触部位であるため、剛性を有する重い金属材料（鉄）で形成される。よって、衝撃吸収部材５３は、自身が固定される一方側から離れた他方側において、車両の振動等で弾性体５３ｂが径方向に変位することにより、円環部５３２の径方向の変位が大きくなり易い。 Further, in the above-mentioned non-deformed state, the impact absorbing member 53 is fixed to the regulating surface 52b of the housing by the engagement of the convex locking portion 536 and the concave locking portion 52d. Therefore, one side of the impact absorbing member 53 is unlikely to be displaced in the axial direction A and in the radial direction. Further, on the other side of the impact absorbing member 53, that is, on the side where the large diameter portion 51 is disposed opposite to the regulating surface 52b, the impact absorbing member 53 is disposed so as to be compressively deformed in the axial direction A and radially displaceable. Ru. Specifically, with one side end surface 533b of elastic body 53b mounted on restriction surface 52b as a fixed support point, it can be compressed and displaced in the axial direction A according to the rubbery elasticity of elastic body 53b, and shearing of elastic body 53b it is displaceable in the radial direction through the radial gap S 1 in accordance with rigidity. An annular portion 532 is disposed at the other end of the impact absorbing member 53. The annular portion 532 is a contact portion of the impact absorbing member 53 which directly receives the impact from the large diameter portion 51, and therefore is formed of a heavy metal material (iron) having rigidity. Therefore, on the other side apart from the one side to which the shock absorbing member 53 is fixed, the elastic body 53b is displaced in the radial direction due to the vibration of the vehicle etc., whereby the radial displacement of the annular portion 532 is large. It is easy to become.

図４に示したとおり、車両の振動等によって、衝撃吸収部材５３の円環部５３２が径方向に変位して径方向隙間Ｇを閉塞し、ハウジングの内周面５２ｃに衝突する際には、円環部５３２は、弾性膜５３５ａを介して内周面５２ｃに接触する（図４の二点鎖線参照）。弾性膜５３５ａによって、円環部の外周面５３２ｄとハウジングの内周面５２ｃとの金属同士の衝突衝撃を吸収し、接触音を低減（音圧を減衰）できる。ハウジングの内周面５２ｃに対向する弾性膜５３５ａの膜厚は、円環部の外周面５３２ｄを覆う最も薄膜状の（膜厚Ｔの）部位から、規制面５２ｂに向けて角部５３２ｃをなす終点（Ｒ状曲面をなす始点）に至る対応部位まで徐々厚くなるように形成され、接触音の低減効果が大きくなる。   As shown in FIG. 4, when the annular portion 532 of the shock absorbing member 53 is displaced in the radial direction by the vibration of the vehicle or the like to close the radial gap G and collide with the inner circumferential surface 52c of the housing, The annular portion 532 is in contact with the inner circumferential surface 52c via the elastic film 535a (see the two-dot chain line in FIG. 4). By the elastic film 535a, the collision impact between metals of the outer peripheral surface 532d of the annular portion and the inner peripheral surface 52c of the housing can be absorbed, and the contact noise can be reduced (sound pressure can be attenuated). The film thickness of the elastic film 535a opposed to the inner peripheral surface 52c of the housing forms a corner 532c from the most thin film (of film thickness T) covering the outer peripheral surface 532d of the annular portion toward the control surface 52b. It forms so that it may become thick gradually to the corresponding site | part which reaches an end point (starting point which makes R-shaped curved surface), and the reduction effect of a contact sound becomes large.

大径部５１が円環部５３２に衝撃力を付与しない場合に、弾性体５３ｂの本体部５３ｃは、ハウジングの内周面５２ｃとの間に径方向隙間Ｓ１を介して配置される。本体部５３ｃは、仮に筒部５３１の端部５３１ｃが規制面５２ｂに当接するように延在するとした際の架空の筒部の外周面との間に、隙間Ｓ２を介して配置される（図６上段参照）。 When the large diameter portion 51 does not apply an impact force to the annular portion 532, the main portion 53 c of the elastic body 53 b is disposed between the inner circumferential surface 52 c of the housing and the radial gap S 1 . Main unit 53c, if the end portion 531c of the cylindrical portion 531 between the outer circumferential surface of the imaginary cylindrical portion at the time of the extending so as to abut against the regulating surface 52 b, are disposed through the gap S 2 ( See the upper part of FIG.

そして、大径部５１が円環部５３２に衝撃力を付与した場合に、本体部５３ｃは、規制面５２ｂ及び円環部５３２によって軸線方向Ａに押し付けられることにより、径方向隙間Ｓ１、隙間Ｓ２が占めていた空間を充填するように圧縮変形する。筒部の端部５３１ｃの端面と規制面５２ｂとの間の開口部５３ｄの間隔が、間隔Ｄから徐々に縮まる。最終的には、本体部５３ｃは、大径部用ハウジング５２の内周面５２ｃ、ハウジングの規制面５２ｂ、筒部の外周面５３１ｂ及び軸線方向Ａに圧縮代Ｘだけ変位した後の円環部５３２＊（図６下段において、圧縮変形後の部材等の符号に適宜に＊を付す）の全てに接触した状態に圧縮変形する。つまり、圧縮変形後の本体部５３ｃ＊は、軸線方向Ａに圧縮代Ｘ（＜間隔Ｄ）だけ変位した圧縮空間ＳＸの内部に充満状態で配置される。 Then, when the large diameter portion 51 applies an impact force to the annular portion 532, the main body portion 53 c is pressed in the axial direction A by the restriction surface 52 b and the annular portion 532, so that the radial direction clearance S 1 , clearance compression deformed so as to fill a space S 2 is occupied. The distance between the opening 53 d between the end face of the end 531 c of the cylindrical portion and the restriction surface 52 b is gradually reduced from the distance D. Finally, the main body portion 53c is formed by displacing the inner circumferential surface 52c of the large diameter portion housing 52, the regulation surface 52b of the housing, the outer circumferential surface 531b of the cylindrical portion and the axial direction A by the compression margin X 532 * Compressively deforms to a state in which it is in contact with all of 532 * (in the lower part of FIG. 6, symbols such as members after compressive deformation are appropriately added * ). That is, the main body portion after the compression deformation 53c * is placed in a filling condition within the compression space S X which is displaced in the axial direction A by compression allowance X (<interval D).

このように、弾性体５３ｂが圧縮する過程において、弾性体５３ｂの他方側端面５３３ａから弾性膜５３５ａに連続する部分は、図５に示すように、円環部の角部５３２ｃから外周面５３２ｄに連続するなだらかなＲ形状に沿って形成されている。よって、円環部５３２を介して大径部５１から受ける圧縮荷重Ｆに対して、弾性体５３ｂないし一体化された弾性膜５３５ａがなす隅部Ｐ１近傍の部位において、応力が集中しにくくなっている。よって、弾性体５３ｂの圧縮変形時に、ゴム状の弾性膜５３５ａが流動する際の起点となり得る、円環部の角部５３２ｃを覆う曲面近傍の隅部Ｐ１に生じる応力が緩和される。円環部の外周面５３２ｄを軸線方向Ａに沿って略直状に覆う弾性膜５３５ａの部位（図４中符号Ｐ２で示す）が、弾性体５３ｂの圧縮変形に伴って円環部の外周面５３２ｄを回り込んではみ出すように変形するのを抑制できる。 In this manner, in the process of the elastic body 53b compressing, the portion continuing from the other side end face 533a of the elastic body 53b to the elastic film 535a is, as shown in FIG. It is formed along a continuous gentle R shape. Therefore, with respect to the compressive load F received from the large diameter portion 51 via the annular portion 532, stress is less likely to be concentrated in the vicinity of the corner portion P 1 formed by the elastic body 53 b or the integrated elastic film 535 a. ing. Therefore, when the compression deformation of the elastic body 53b, a rubber-like elastic film 535a can become a starting point of time of flow, stress generated in the corner portion P 1 of the curved surface near covering the corner 532c of the annular portion is relieved. Of an outside circumference portion of the outer peripheral surface 532d of the axial direction A the elastic film covers substantially straight along the 535a of the annular portion (shown in Figure 4 reference numeral P 2) is annular portion along with the compressive deformation of the elastic body 53b It is possible to suppress deformation so as to go around the surface 532 d.

また、圧縮代Ｘだけ変位した本体部５３ｃ＊は、圧縮空間ＳＸ内に充満し、圧縮変形するための残余の空間を有さず体積飽和する。本体部５３ｃ＊は、大径部用ハウジング５２と衝撃受部材５３ａとで形成される、基本的には外部と連通する間隙を有さない圧縮空間ＳＸ内に密着状態で内接し、圧縮変形するために空間外部にはみ出す逃げ場を有さない。弾性体５３ｂ＊は、圧縮空間ＳＸ内において、充満状態で円環部５３２＊と規制面５２ｂとの間で介在し続け、衝撃力を受けた衝撃吸収部材５３が圧縮代Ｘ（＜間隔Ｄ）以上に軸線方向Ａに変位するのを妨げる。衝撃吸収部材５３の衝撃受部材５３ａは、その端部５３１ｃが規制面５２ｂに対して衝突しない非接触状態の配置を維持し、大径部用ハウジング５２に対する相対移動が規制される。よって、金属同士の両者が衝突するのを回避できる。そのうえで、圧縮した充満状態で介在する弾性体５３ｂのゴム状特性によって、金属同士の両者が衝突する場合と比較すると、衝突衝撃が伝達されるのを抑制できる。 In addition, the main portion 53c * displaced by the compression margin X fills in the compression space SX, and does not have a remaining space for compressive deformation, and the volume saturates. The body portion 53c * is formed by the large-diameter portion housing 52 and impact receiving member 53a, basically inscribed in close contact to the compression space S X without a gap communicating with the outside, compressive deformation In order to do that, there is no escape space that protrudes outside the space. Elastic 53b *, the compression space S in the X, continues interposed between the annular portion 532 * and the regulating surface 52b in charging status, the shock absorbing member 53 receives an impact force compression margin X (<distance D ) To prevent displacement in the axial direction A. The impact receiving member 53a of the impact absorbing member 53 maintains the noncontacting arrangement in which the end 531c does not collide with the restricting surface 52b, and the relative movement with respect to the large diameter portion housing 52 is restricted. Therefore, it can avoid that both metals collide. In addition, due to the rubber-like characteristics of the elastic body 53b interposed in the compressed full state, it is possible to suppress the transmission of the collision impact as compared with the case where the metals collide with each other.

円環部の外周面５３２ｄには、外周面５３２ｄを覆う弾性体の弾性膜５３５ａが接着され、衝撃吸収部材５３は、接触音の発生を低減する構成を有する。そのため、ハウジングの内周面５２ｃと膜厚Ｔの弾性膜５３５ａとの径方向隙間Ｇを極力小さくできる。つまり、円環部５３２の外径を大きく形成でき、外部と連通する間隙を有さない圧縮空間ＳＸを大きく確保できる。弾性体５３ｂの充満率を高めて衝撃吸収機能をよりよく発揮できる。 An elastic film 535a of an elastic material covering the outer peripheral surface 532d is adhered to the outer peripheral surface 532d of the annular portion, and the shock absorbing member 53 has a configuration for reducing the generation of the contact noise. Therefore, the radial gap G between the inner circumferential surface 52c of the housing and the elastic film 535a of the film thickness T can be minimized. In other words, the circle can be increased form the outer diameter of the ring portion 532, can ensure a large compression space S X without a gap communicating with the outside. The filling rate of the elastic body 53b can be increased to exhibit the shock absorbing function better.

本発明は上述した実施形態に限られない。図７に示す円環部の裏面５３２ｂに角部５３２ｃが形成されなくても、更に筒部５３１を有さなくても構わない。この場合でも、円環部５３２の外周面５３２ｄ２は、弾性膜５３５ａ２を介してハウジングの内周面５２ｃに接触する（図７の二点鎖線参照）。弾性膜５３５ａ２によって、円環部の外周面５３２ｄ２とハウジングの内周面５２ｃとの金属同士の衝突衝撃を吸収して、接触音を低減できる。なお、図７中、上述の衝撃吸収部材５３の各対応部位には、同じ符号を付した。 The present invention is not limited to the embodiments described above. Even if the corner 532 c is not formed on the back surface 532 b of the annular portion shown in FIG. 7, the cylindrical portion 531 may not be provided. In this case, the outer peripheral surface 532d 2 of the annular portion 532 through the elastic film 535a 2 in contact with the inner circumferential surface 52c of the housing (see the two-dot chain lines in FIG. 7). By an elastic membrane 535a 2, to absorb the collision impact between metals and the inner circumferential surface 52c of the outer circumferential surface 532d 2 and the housing of the annular portion, it can reduce the contact noise. In FIG. 7, the corresponding parts of the above-described impact absorbing member 53 are denoted by the same reference numerals.

（５．実施形態による効果）
上記実施形態によれば、衝撃吸収部材５３は、大径部５１の当接端面５１ａに接触可能な円環部５３２を備える衝撃受部材５３ａと、規制面５２ｂと円環部５３２との間に配置され、ハウジングの内周面５２ｃに対して径方向隙間Ｓ１を有し且つ大径部用ハウジング５２に保持される弾性体５３ｂと、円環部５３２の外周面５３２ｄ、５３２ｄ２に全周に亘って接着され、ハウジングの内周面５２ｃに対して径方向隙間Ｇを有して配置される弾性膜５３５ａ、５３５ａ２と、を備える。 (Effect according to the embodiment)
According to the above-described embodiment, the impact absorbing member 53 is provided between the impact receiving member 53 a including the annular portion 532 that can contact the abutting end surface 51 a of the large diameter portion 51, the restricting surface 52 b and the annular portion 532. are arranged, the whole circumference and the elastic body 53b which is held in the large-diameter portion housing 52 and has a radial clearance S 1 with respect to the inner peripheral surface 52c of the housing, the outer peripheral surface 532d of the annular portion 532, the 532d 2 is bonded over comprises elastic film 535a which is arranged with a radial gap G with respect to the inner peripheral surface 52c of the housing, and 535a 2, a.

よって、円環部５３２が、ハウジングの内周面５２ｃに対して径方向隙間Ｇ及び弾性膜５３５ａを介して配置される。車両の振動等によって径方向隙間Ｓ１を有し且つ大径部用ハウジング５２に保持される弾性体５３ｂを介して円環部５３２が径方向に変位した場合に、弾性膜５３５ａがハウジングの内周面５２ｃに接触する。円環部５３２が大径部用ハウジング５２に直接接触しないので接触音を低減できる。 Thus, the annular portion 532 is disposed with respect to the inner circumferential surface 52c of the housing via the radial gap G and the elastic film 535a. When annular portion 532 is displaced in the radial direction via elastic body 53 b having radial direction clearance S 1 and being held by large diameter portion housing 52 due to vibration of the vehicle, etc. Contact the circumferential surface 52c. Since the ring portion 532 does not directly contact the large diameter portion housing 52, the contact noise can be reduced.

また、上記実施形態によれば、円環部の外周面５３２ｄのうち規制面５２ｂ側の角部５３２ｃは、規制面５２ｂに向かって縮径するように形成され、弾性体５３ｂは、円環部５３２に接着され、弾性膜５３５ａは、弾性体５３ｂと一体的である。更に、角部５３２ｃの軸線方向Ａの断面形状を円弧凸状（Ｒ形状）にできる。よって、弾性体５３ｂの圧縮時に、角部５３２ｃを覆う弾性膜５３５ａの隅部Ｐ１近傍ないし隅部Ｐ１を起点に応力集中するのを防げる。弾性体５３ｂ、ひいては衝撃吸収部材５３の耐久性向上に繋がる。 Further, according to the above embodiment, the corner 532c of the outer peripheral surface 532d of the annular portion on the side of the regulating surface 52b is formed so as to reduce in diameter toward the regulating surface 52b, and the elastic body 53b is formed of the annular portion The elastic film 535a is bonded to the elastic member 532, and is integral with the elastic body 53b. Furthermore, the cross-sectional shape in the axial direction A of the corner portion 532c can be formed into an arc convex shape (R shape). Thus, during compression of the elastic body 53b, it prevents the to stress concentration of the elastic membrane corner P 1 near to the corner P 1 of 535a covering the corner portion 532c as a starting point. This leads to an improvement in the durability of the elastic body 53b and hence the impact absorbing member 53.

また、上記実施形態によれば、衝撃受部材５３ａは、ハウジングの内周面５２ｃに対向する筒部５３１、及び、筒部５３１から径方向外方に延在し、規制面５２ｂに対向する円環部５３２を有しており、弾性体５３ｂは、ハウジングの内周面５２ｃ、規制面５２ｂ、筒部の外周面５３１ｂ及び円環部５３２により形成される初期空間Ｓ０に配置され、大径部５１が円環部５３２に衝撃力を付与しない場合に、弾性体５３ｂは、ハウジングの内周面５２ｃ及び筒部の外周面５３１ｂの間に径方向隙間Ｓ１、隙間Ｓ２を介して配置され、大径部５１が円環部５３２に衝撃力を付与した場合に、弾性体５３ｂは、規制面５２ｂ及び円環部５３２により軸線方向Ａに押し付けられることにより、径方向隙間Ｓ１、隙間Ｓ２を充填するように、ハウジングの内周面５２ｃ、規制面５２ｂ、筒部の外周面５３１ｂ及び円環部５３２、の全てに接触した状態に変形し、衝撃受部材５３ａは、規制面５２ｂに対して非接触状態を維持したまま、変形した前記弾性体５３ｂによってハウジングに対する相対移動を規制される。 Further, according to the above embodiment, the impact receiving member 53a extends radially outward from the cylindrical portion 531 facing the inner circumferential surface 52c of the housing and the cylindrical portion 531, and a circle facing the restriction surface 52b. has a ring portion 532, the elastic body 53b is disposed in the initial spatial S 0 which is formed inner peripheral surface 52c of the housing, the regulating surface 52 b, the outer peripheral surface 531b and the annular portion 532 of the cylindrical portion, a larger diameter When the portion 51 applies no impact force to the annular portion 532, the elastic body 53 b is disposed between the inner circumferential surface 52 c of the housing and the outer circumferential surface 531 b of the cylindrical portion via the radial gap S 1 and the gap S 2. When the large diameter portion 51 applies an impact force to the annular portion 532, the elastic body 53 b is pressed in the axial direction A by the restricting surface 52 b and the annular portion 532, so that the radial direction clearance S 1 , clearance How to fill S 2 The impact receiving member 53a maintains a non-contact state with respect to the restricting surface 52b by being deformed in contact with all of the inner peripheral surface 52c of the ging, the restricting surface 52b, the outer peripheral surface 531b of the cylindrical portion and the annular portion 532 As it is, relative movement with respect to the housing is restricted by the deformed elastic body 53b.

よって、弾性体５３ｂが、軸線方向Ａに押し付けられて径方向隙間Ｓ１、隙間Ｓ２を充填されるように圧縮変形するため、弾性体５３ｂは、円環部５３２の外周面５３２ｄを回り込んで流動する状態になり得る。この状態であっても、規制面５２ｂに向かって縮径する形状の角部５３２ｃに沿って形成される弾性膜５３５ａを有するので、隅部Ｐ１に応力集中するのを回避でき、弾性体５３ｂの耐久性が高まる。 Therefore, the elastic body 53b is pushed around in the axial direction A so as to be compressed and deformed so as to fill the radial gaps S 1 and S 2. The elastic body 53b wraps around the outer peripheral surface 532d of the annular portion 532 Can flow in the Even in this state, since it has an elastic film 535a which is formed along the corner portion 532c having a shape reduced in diameter toward the regulating surface 52 b, it can avoid the stress concentration on the corner portion P 1, the elastic body 53b The durability of the

また、上記実施形態によれば、大径部用ハウジング５２は、内周面５２ｃに凹状係止部５２ｄを備え、弾性体５３ｂは、ハウジングの凹状係止部５２ｄに嵌合される凸状係止部５３６を備え、衝撃受部材５３ａは、凸状係止部を凹状係止部５２ｄに嵌合させることで、大径部用ハウジング５２に保持される。よって、ハウジングの規制面５２ｂの側で固定される構造なので、衝撃吸収部材５３の大径部５１の側が車両の振動等により大きく変位し易くなっており、大径部５１側の円環部５３２の接触音の低減効果がよりよく効奏する。   Further, according to the above embodiment, the large diameter portion housing 52 has the concave locking portion 52d on the inner circumferential surface 52c, and the elastic body 53b is a convex engagement engaged with the concave locking portion 52d of the housing. The impact receiving member 53a is held by the large diameter portion housing 52 by fitting the convex locking portion to the concave locking portion 52d. Therefore, because the structure is fixed on the side of the control surface 52 b of the housing, the side of the large diameter portion 51 of the impact absorbing member 53 is easily displaced largely due to the vibration of the vehicle, etc. The effect of reducing the contact noise is more effective.

また、上記実施形態によれば、上記の実施形態の何れかのダンパ装置５０を備えるステアリング装置ＳＴであって、両端部がタイロッド２４を介して転舵輪２６に連結されると共に軸線方向Ａに往復移動して転舵輪２６を転舵する転舵シャフト２１であり、タイロッド２４に揺動可能に連結される大径部５１を備える転舵シャフト２１と、転舵シャフト２１を収容する大径部用ハウジング５２と、衝撃吸収部材５３と、を備える。よって、上述したダンパ装置の効果を有するステアリング装置ＳＴを得ることができる。   Further, according to the above embodiment, the steering apparatus ST is provided with the damper device 50 of any of the above embodiments, and both ends thereof are connected to the steered wheels 26 via the tie rods 24 and reciprocate in the axial direction A. A steered shaft 21 that moves to steer the steered wheels 26 and includes the steered shaft 21 having a large diameter portion 51 pivotally connected to the tie rod 24 and a steered shaft 21 for accommodating the steered shaft 21 A housing 52 and an impact absorbing member 53 are provided. Therefore, the steering device ST having the effect of the damper device described above can be obtained.

ＳＴ…ステアリング装置、Ｓ０…初期空間、Ｓｘ…圧縮空間、Ｓ１、Ｓ２…隙間、２１…転舵シャフト（シャフト）、２４…タイロッド、２６…転舵輪、５０…ダンパ装置、５１…大径部、５１ａ…当接端面、５２…大径部用ハウジング（ハウジング）、５２ｂ…規制面、５２ｃ…（ハウジングの）内周面、５３…衝撃吸収部材、５３ａ…衝撃受部材、５３１…筒部、５３１ｂ…（筒部の）外周面、５３２…円環部、５３２ｃ…角部、５３２ｄ，５３２ｄ２…（円環部の）外周面、５３ｂ…弾性体、５３３ｃ…接着部、５３５ａ…弾性膜 ST: steering device, S 0 : initial space, S x : compression space, S 1 , S 2 : clearance, 21: steering shaft (shaft), 24: tie rod, 26: steering wheel, 50: damper device, 51 ... Large diameter portion 51a: Contact end surface 52: Large diameter portion housing (housing) 52b: Regulating surface 52c: (In the housing) inner circumferential surface 53: Shock absorbing member 53a: Shock receiving member 531: 531 Tubular part, 531b ... (tubular part) outer peripheral surface, 532 ... ring part, 532c ... corner part, 532d, 532d 2 ... (ring part) outer peripheral surface, 53b ... elastic body, 533c ... adhesive part, 535a ... Elastic membrane

Claims (6)

軸部及び大径部を備えるシャフトと、
筒状に形成され、前記シャフトを軸線方向に相対移動可能に挿通し、前記大径部の端面に対して軸線方向に対向する規制面を備えるハウジングと、
前記軸部に挿通され、前記大径部の端面と前記規制面との軸線方向の間に介装される衝撃吸収部材と、を備えるダンパ装置であって、
前記衝撃吸収部材は、
前記大径部の端面に接触可能な円環部を備える衝撃受部材と、
前記規制面と前記円環部との間に配置され、前記ハウジングの内周面に対して径方向隙間を有し且つ前記ハウジングに保持され、ゴム材料又はゴム状弾性を有する合成樹脂材料で成形される弾性体と、
前記円環部の外周面に全周に亘って接着され、前記ハウジングの内周面に対して径方向隙間を有して配置され、ゴム材料又はゴム状弾性を有する合成樹脂材料で成形される弾性膜と、を備える、ダンパ装置。 A shaft comprising a shaft portion and a large diameter portion;
A housing formed in a tubular shape, having the restriction surface inserted therein so as to be relatively movable in the axial direction, and axially facing the end face of the large diameter portion;
A damper device comprising: an impact absorbing member inserted through the shaft and interposed between an end face of the large diameter portion and an axial direction of the restricting surface,
The shock absorbing member is
An impact receiving member comprising an annular portion capable of contacting an end face of the large diameter portion;
Molded of a rubber material or a synthetic resin material having a rubber-like elasticity, which is disposed between the restriction surface and the annular portion, has a radial gap with respect to the inner peripheral surface of the housing, is held by the housing The elastic body to be
It is bonded to the entire outer peripheral surface of the annular portion, is disposed with a radial gap with respect to the inner peripheral surface of the housing, and is formed of a rubber material or a synthetic resin material having rubber-like elasticity. An elastic membrane. 前記円環部の外周面のうち前記規制面側の角部は、前記規制面に向かって縮径するように形成され、
前記弾性体は、前記円環部に接着され、
前記弾性膜は、前記弾性体と一体的である、請求項１に記載のダンパ装置。 Of the outer peripheral surface of the annular portion, the corner on the restriction surface side is formed to reduce in diameter toward the restriction surface,
The elastic body is adhered to the annular portion.
The damper device according to claim 1, wherein the elastic film is integral with the elastic body. 前記角部の軸線方向断面形状は、円弧凸状である、請求項２に記載のダンパ装置。   The damper device according to claim 2, wherein an axial cross-sectional shape of the corner portion is convex in an arc shape. 前記衝撃受部材は、
前記ハウジングの内周面に対向する筒部、及び、前記筒部から径方向外方に延在し、前記規制面に対向する前記円環部を有しており、
前記弾性体は、
前記ハウジングの内周面、前記規制面、前記筒部の外周面及び前記円環部により形成される空間に配置され、
前記大径部が前記円環部に衝撃力を付与しない場合に、
前記弾性体は、前記ハウジングの内周面及び前記筒部の外周面の少なくとも一方との間に隙間を介して配置され、
前記大径部が前記円環部に衝撃力を付与した場合に、
前記弾性体は、前記規制面及び前記円環部により軸線方向に押し付けられることにより、前記隙間を充填するように、前記ハウジングの内周面、前記規制面、前記筒部の外周面及び前記円環部、の全てに接触した状態に変形し、
前記衝撃受部材は、前記規制面に対して非接触状態を維持したまま、変形した前記弾性体によって前記ハウジングに対する相対移動を規制される、請求項２又は３に記載のダンパ装置。 The impact receiving member is
A cylindrical portion facing the inner peripheral surface of the housing, and the annular portion extending radially outward from the cylindrical portion and facing the restriction surface,
The elastic body is
It is disposed in a space formed by the inner circumferential surface of the housing, the restriction surface, the outer circumferential surface of the cylindrical portion, and the annular portion,
When the large diameter portion does not apply an impact force to the annular portion,
The elastic body is disposed with a gap between at least one of the inner peripheral surface of the housing and the outer peripheral surface of the cylindrical portion,
When the large diameter portion applies an impact force to the annular portion,
The elastic body is pressed in the axial direction by the restriction surface and the annular portion to fill the gap, the inner circumferential surface of the housing, the restriction surface, the outer circumferential surface of the cylindrical portion, and the circle. Deform into contact with all the ring parts,
The damper device according to claim 2 or 3, wherein the impact receiving member is restricted in relative movement with respect to the housing by the deformed elastic body while maintaining the non-contact state with respect to the restriction surface. 前記ハウジングは、前記規制面側の内周面に凹状係止部を備え、
前記弾性体は、前記ハウジングの前記凹状係止部に嵌合される凸状係止部を備え、
前記衝撃受部材は、前記凸状係止部を前記凹状係止部に嵌合させることで、前記ハウジングに保持される、請求項１ないし４の何れか一項に記載のダンパ装置。 The housing is provided with a concave locking portion on the inner peripheral surface on the restriction surface side,
The elastic body includes a convex locking portion fitted to the concave locking portion of the housing,
The damper device according to any one of claims 1 to 4, wherein the impact receiving member is held by the housing by fitting the convex locking portion to the concave locking portion. 請求項１−５の何れか一項に記載のダンパ装置を備えるステアリング装置であって、
両端部がタイロッドを介して転舵輪に連結されると共に軸線方向に往復移動して前記転舵輪を転舵する転舵シャフトであり、前記タイロッドに揺動可能に連結される前記大径部を備える前記シャフトと、
前記転舵シャフトを収容する前記ハウジングと、
前記衝撃吸収部材と、
を備える、ステアリング装置。 A steering apparatus comprising the damper device according to any one of claims 1-5, wherein
A steered shaft that has both ends connected to steered wheels via tie rods and that reciprocates in the axial direction to steer the steered wheels, and includes the large diameter portion pivotally coupled to the tie rods Said shaft,
The housing accommodating the steering shaft;
The shock absorbing member;
, A steering device.
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CN201610922095.1A CN107097842B (en) 2015-10-22 2016-10-21 Damping device and steering device
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