JP6617508B2

JP6617508B2 - Suspension device

Info

Publication number: JP6617508B2
Application number: JP2015199861A
Authority: JP
Inventors: 康雄秋本; 有一長谷川; 真一郎沖; 健夫水口; 渉末廣
Original assignee: Mitsubishi Motors Corp
Current assignee: Mitsubishi Motors Corp
Priority date: 2015-10-08
Filing date: 2015-10-08
Publication date: 2019-12-11
Anticipated expiration: 2035-10-08
Also published as: JP2017072204A

Description

本発明は、サスペンション装置に関する。 The present invention relates to a suspension device.

自動車には、走行中の路面から入力される荷重を吸収するために、サスペンション装置が備えられている。
サスペンション装置として、ショックアブソーバと、リバウンドストッパとを備えるストラット式サスペンション装置が提案されている。
ショックアブソーバは、シリンダ内でピストンロッドのピストンを移動させることで運動エネルギーを減衰するものであり、ピストンロッドを上向きにして配置されシリンダの下部が車輪側に連結される。
ピストンロッドの上端は防振基体を介してボディに結合されており、防振基体は衝撃緩和、微振動の吸収を行う。 An automobile is provided with a suspension device in order to absorb a load input from a running road surface.
As a suspension device, a strut suspension device including a shock absorber and a rebound stopper has been proposed.
The shock absorber attenuates kinetic energy by moving the piston of the piston rod in the cylinder, and is arranged with the piston rod facing upward, and the lower part of the cylinder is connected to the wheel side.
The upper end of the piston rod is coupled to the body via a vibration isolating base, and the vibration isolating base relieves shock and absorbs fine vibrations.

リバウンドストッパは、ピストンロッドの上端に取着された環板部と、環板部の下面に配置された弾性材とを備えている。
そして、弾性材がボディの部分に弾接することでピストンロッドの下方への変位が制限され、車輪が凹部に落ちてピストンロッドが下方に引っ張られたときに、防振基体がボディから離間してショックアブソーバ（サスペンション装置）が脱落することを防止するためのものである。
ところで、このようなサスペンション装置では、旋回時に車輪が左右に動きピストンロッドが斜めに傾くようなこじれ方向に変位したとき、弾性材の下面がボディの部分に接触して擦れることで異音が発生することがある。
そこで、特許文献１には、弾性材の下面に複数の球冠状突起を周方向に並べて設け、ピストンロッドがこじれ方向に変位したときに、それら球冠状突起がボディの部分に接触した状態で変形し、異音の発生の抑制を図ることが提案されている。 The rebound stopper includes an annular plate portion attached to the upper end of the piston rod, and an elastic material disposed on the lower surface of the annular plate portion.
The elastic material is elastically contacted with the body part to limit the downward displacement of the piston rod. When the wheel falls into the recess and the piston rod is pulled downward, the vibration isolating base is separated from the body. This is to prevent the shock absorber (suspension device) from falling off.
By the way, in such a suspension device, when the wheel moves to the left and right during turning, and the piston rod is displaced in a twisting direction that tilts diagonally, the lower surface of the elastic material comes into contact with the body portion and rubs to generate noise. There are things to do.
Therefore, in Patent Document 1, a plurality of spherical crown-shaped projections are arranged in the circumferential direction on the lower surface of the elastic material, and when the piston rod is displaced in the twisting direction, the spherical crown-shaped projections are deformed in a state of being in contact with the body portion. However, it has been proposed to suppress the occurrence of abnormal noise.

特開２００７−１０７７１４号公報JP 2007-107714 A

しかしながら、周方向に間隔をおいた複数の球冠状突起では、加わる荷重によっては球冠状突起が潰れ弾性材の下面全域がボディの部分に対して接触し、弾性材に変形する箇所が無くなるため、ピストンロッドがこじれ方向に変位したとき、弾性材の下面がボディの部分に擦れてしまい、異音の抑制を図る上で改善の余地がある。
本発明は、このような事情に鑑みてなされたものであり、その目的は、ピストンロッドがこじれ方向に変位したときに生じる異音の発生を抑制する上で有利なサスペンション装置を提供することにある。 However, in the plurality of spherical crown-shaped projections spaced in the circumferential direction, depending on the applied load, the spherical crown-shaped projections are crushed, the entire bottom surface of the elastic material comes into contact with the body portion, and there is no place to deform into the elastic material. When the piston rod is displaced in the twisting direction, the lower surface of the elastic material is rubbed against the body portion, so there is room for improvement in suppressing noise.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a suspension device that is advantageous in suppressing the generation of abnormal noise that occurs when the piston rod is displaced in the twisting direction. is there.

上述の目的を達成するため、本発明は、ピストンロッドを上向きにして配置され、シリンダの下部が車輪側に連結されるショックアブソーバと、前記ピストンロッドの上部に取着されてボディに当接される防振基体と、前記ボディに形成されて前記ピストンロッドの半径方向及び上方への前記防振基体の変位を規制する規制部と、前記ピストンロッドの上部に取着され前記規制部の上方で前記ピストンロッドの周囲に延在する環板部と、同環板部の下面に配置されて前記規制部に弾接する弾性材とを有し、前記ピストンロッドの下方への変位を制限するリバウンドストッパと、を備えたサスペンション装置であって、前記弾性材は、前記下面の外周部の全周にわたって延在する外側環状部と、前記外側環状部の半径方向内側で前記下面の全周にわたって延在する内側環状部と、前記外側環状部と前記内側環状部との間でそれら外側環状部および内側環状部の全周にわたって延在する凹溝とを含んで構成され、前記凹溝の底面で前記凹溝の周方向に間隔をおいた複数箇所に前記外側環状部と前記内側環状部とにわたって延在するリブが膨出形成されていることを特徴とする。
また、本発明は、ピストンロッドを上向きにして配置され、シリンダの下部が車輪側に連結されるショックアブソーバと、前記ピストンロッドの上部に取着されてボディに当接される防振基体と、前記ボディに形成されて前記ピストンロッドの半径方向及び上方への前記防振基体の変位を規制する規制部と、前記ピストンロッドの上部に取着され前記規制部の上方で前記ピストンロッドの周囲に延在する環板部と、同環板部の下面に配置されて前記規制部に弾接する弾性材とを有し、前記ピストンロッドの下方への変位を制限するリバウンドストッパと、を備えたサスペンション装置であって、前記弾性材は、前記下面の外周部の全周にわたって延在する外側環状部と、前記外側環状部の半径方向内側で前記下面の全周にわたって延在する内側環状部と、前記外側環状部と前記内側環状部との間でそれら外側環状部および内側環状部の全周にわたって延在する凹溝とを含んで構成され、前記外側環状部の下端端面および前記内側環状部の下端端面に、前記規制部との接触面積を減少させる凹凸構造が形成されていることを特徴とする。
また、本発明は、ピストンロッドを上向きにして配置され、シリンダの下部が車輪側に連結されるショックアブソーバと、前記ピストンロッドの上部に取着されてボディに当接される防振基体と、前記ボディに形成されて前記ピストンロッドの半径方向及び上方への前記防振基体の変位を規制する規制部と、前記ピストンロッドの上部に取着され前記規制部の上方で前記ピストンロッドの周囲に延在する環板部と、同環板部の下面に配置されて前記規制部に弾接する弾性材とを有し、前記ピストンロッドの下方への変位を制限するリバウンドストッパと、を備えたサスペンション装置であって、前記弾性材は、前記下面の外周部の全周にわたって延在する外側環状部と、前記外側環状部の半径方向内側で前記下面の全周にわたって延在する内側環状部と、前記外側環状部と前記内側環状部との間でそれら外側環状部および内側環状部の全周にわたって延在する凹溝とを含んで構成され、前記凹溝に対向する前記規制部の環状の部分に、前記環状の部分の周方向に間隔をおいて複数の排水孔が形成され、前記排水孔に対向する前記防振基体の箇所に、前記排水孔内の水を前記防振基体の下部から前記防振基体外へ導く排水路が形成されていることを特徴とするサスペンション装置。
また、本発明は、ピストンロッドを上向きにして配置され、シリンダの下部が車輪側に連結されるショックアブソーバと、前記ピストンロッドの上部に取着されてボディに当接される防振基体と、前記ボディに形成されて前記ピストンロッドの半径方向及び上方への前記防振基体の変位を規制する規制部と、前記ピストンロッドの上部に取着され前記規制部の上方で前記ピストンロッドの周囲に延在する環板部と、同環板部の下面に配置されて前記規制部に弾接する弾性材とを有し、前記ピストンロッドの下方への変位を制限するリバウンドストッパと、を備えたサスペンション装置であって、前記弾性材は、前記下面の外周部の全周にわたって延在する外側環状部と、前記外側環状部の半径方向内側で前記下面の全周にわたって延在する内側環状部と、前記外側環状部と前記内側環状部との間でそれら外側環状部および内側環状部の全周にわたって延在する凹溝とを含んで構成され、前記外側環状部または前記内側環状部の少なくとも一方に、前記外側環状部の下端端面および前記内側環状部の下端端面が前記規制部に接触した状態で前記規制部に弾接するリップ部が設けられていることを特徴とする。
また、本発明は、ピストンロッドを上向きにして配置され、シリンダの下部が車輪側に連結されるショックアブソーバと、前記ピストンロッドの上部に取着されてボディに当接される防振基体と、前記ボディに形成されて前記ピストンロッドの半径方向及び上方への前記防振基体の変位を規制する規制部と、前記ピストンロッドの上部に取着され前記規制部の上方で前記ピストンロッドの周囲に延在する環板部と、同環板部の下面に配置されて前記規制部に弾接する弾性材とを有し、前記ピストンロッドの下方への変位を制限するリバウンドストッパと、を備えたサスペンション装置であって、前記弾性材は、前記下面の外周部の全周にわたって延在する外側環状部と、前記外側環状部の半径方向内側で前記下面の全周にわたって延在する内側環状部と、前記外側環状部と前記内側環状部との間でそれら外側環状部および内側環状部の全周にわたって延在する凹溝とを含んで構成され、前記外側環状部の下端端面の周方向に間隔をおいた複数箇所に、前記凹溝よりも深さが浅く前記凹溝と前記外側環状部の外周面とを連通する排水溝が設けられ、前記排水溝は、前記凹溝側に位置する幅広部と、前記外周面側に位置し前記幅広部に連通する前記幅広部よりも小さい幅の幅狭部とを含んで形成されていることを特徴とする。
また、本発明は、前記外側環状部および前記内側環状部は、前記ピストンロッドの半径方向に沿った幅と、前記ピストンロッドの軸心方向と平行する方向に沿った高さとを有し、前記高さは前記幅よりも大きな寸法で形成されていることを特徴とする。 In order to achieve the above-described object, the present invention provides a shock absorber in which a piston rod is disposed upward and a lower part of a cylinder is connected to a wheel side, and is attached to an upper part of the piston rod and is brought into contact with a body. An anti-vibration base that is formed on the body and restricts the displacement of the anti-vibration base in the radial direction and upward of the piston rod, and is attached to the upper part of the piston rod and above the restriction part. A rebound stopper that includes an annular plate portion extending around the piston rod and an elastic material that is disposed on a lower surface of the annular plate portion and elastically contacts the regulating portion, and restricts downward displacement of the piston rod. The elastic member includes an outer annular portion that extends over the entire circumference of the outer peripheral portion of the lower surface, and an entire circumference of the lower surface that is radially inward of the outer annular portion. An inner annular portion extending over, is configured to include a groove extending around the entire circumference thereof the outer annular portion and an inner annular portion between said outer annular portion and the inner annular portion, the groove A rib extending over the outer annular portion and the inner annular portion is bulged and formed at a plurality of locations spaced in the circumferential direction of the concave groove on the bottom surface of the groove .
Further, the present invention is a shock absorber that is arranged with the piston rod facing upward, and the lower part of the cylinder is connected to the wheel side, the vibration isolating base that is attached to the upper part of the piston rod and abuts the body, A restricting portion that is formed on the body and restricts displacement of the anti-vibration base in the radial direction and upward of the piston rod; and is attached to an upper portion of the piston rod and around the piston rod above the restricting portion. A suspension comprising: an extending annular plate portion; and a rebound stopper that is disposed on a lower surface of the annular plate portion and elastically contacts the restricting portion and restricts downward displacement of the piston rod. The elastic member includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, and an inner portion extending over the entire circumference of the lower surface radially inward of the outer annular portion. An annular portion, said between the outer annular portion and the inner annular portion is configured to include a groove extending around the entire circumference thereof the outer annular portion and an inner annular portion, the lower end edge of the outer annular portion and the An uneven structure for reducing a contact area with the restricting portion is formed on the lower end face of the inner annular portion .
Further, the present invention is a shock absorber that is arranged with the piston rod facing upward, and the lower part of the cylinder is connected to the wheel side, the vibration isolating base that is attached to the upper part of the piston rod and abuts the body, A restricting portion that is formed on the body and restricts displacement of the anti-vibration base in the radial direction and upward of the piston rod; and is attached to an upper portion of the piston rod and around the piston rod above the restricting portion. A suspension comprising: an extending annular plate portion; and a rebound stopper that is disposed on a lower surface of the annular plate portion and elastically contacts the restricting portion and restricts downward displacement of the piston rod. The elastic member includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, and an inner portion extending over the entire circumference of the lower surface radially inward of the outer annular portion. An annular portion, is configured to include a groove extending around the entire circumference thereof the outer annular portion and an inner annular portion between said outer annular portion and the inner annular portion, the regulating portion facing the groove A plurality of drainage holes are formed in the annular part at intervals in the circumferential direction of the annular part, and the water in the drainage hole is supplied to the vibration isolating base at a position of the antivibration base facing the drainage hole. A suspension device, characterized in that a drainage channel is formed to lead from the lower part of the base to the outside of the vibration-proof base .
Further, the present invention is a shock absorber that is arranged with the piston rod facing upward, and the lower part of the cylinder is connected to the wheel side, the vibration isolating base that is attached to the upper part of the piston rod and abuts the body, A restricting portion that is formed on the body and restricts displacement of the anti-vibration base in the radial direction and upward of the piston rod; and is attached to an upper portion of the piston rod and around the piston rod above the restricting portion. A suspension comprising: an extending annular plate portion; and a rebound stopper that is disposed on a lower surface of the annular plate portion and elastically contacts the restricting portion and restricts downward displacement of the piston rod. The elastic member includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, and an inner portion extending over the entire circumference of the lower surface radially inward of the outer annular portion. An annular portion, said between the outer annular portion and the inner annular portion is configured to include a groove extending around the entire circumference thereof the outer annular portion and an inner annular portion, said outer annular portion or the inner annular portion At least one of these is provided with a lip portion that elastically contacts the regulating portion in a state where the lower end end surface of the outer annular portion and the lower end end surface of the inner annular portion are in contact with the regulating portion .
Further, the present invention is a shock absorber that is arranged with the piston rod facing upward, and the lower part of the cylinder is connected to the wheel side, the vibration isolating base that is attached to the upper part of the piston rod and abuts the body, A restricting portion that is formed on the body and restricts displacement of the anti-vibration base in the radial direction and upward of the piston rod; and is attached to an upper portion of the piston rod and around the piston rod above the restricting portion. A suspension comprising: an extending annular plate portion; and a rebound stopper that is disposed on a lower surface of the annular plate portion and elastically contacts the restricting portion and restricts downward displacement of the piston rod. The elastic member includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, and an inner portion extending over the entire circumference of the lower surface radially inward of the outer annular portion. An annular portion, is configured to include a groove extending around the entire circumference thereof the outer annular portion and an inner annular portion between said outer annular portion and the inner annular portion, the peripheral of the bottom end surface of the outer annular portion Drain grooves that are shallower than the concave grooves and communicate with the outer peripheral surface of the outer annular portion are provided at a plurality of locations spaced in the direction, and the drain grooves are provided on the concave groove side. It is formed to include a wide portion that is positioned, and a narrow portion that is located on the outer peripheral surface side and communicates with the wide portion and having a width smaller than that of the wide portion .
Further, in the present invention, the outer annular portion and the inner annular portion have a width along a radial direction of the piston rod and a height along a direction parallel to the axial direction of the piston rod, The height is formed with a dimension larger than the width.

本発明によれば、ピストンロッドが斜めに傾くようなこじれ方向に変位したとき、弾性材の周方向の一箇所あるいは全周において、外側環状部の下端端面および内側環状部の下端端面と、ストラットハウスの内周部の上面とが当接した状態で内側環状部および外側環状部が撓む。
したがって、外側環状部の下端端面および内側環状部の下端端面が上面に対して擦れることが抑制され、異音の発生が抑制される。
また、本発明によれば、外側環状部および内側環状部は撓み易く、外側環状部の下端端面および内側環状部の下端端面が上面に対して擦れることを抑制する上で有利となり、異音の発生を抑制する上でより有利となる。
また、本発明によれば、外側環状部および内側環状部の剛性を確保でき、外側環状部および内側環状部が座屈しにくくなるため、異音の発生を抑制する上でより有利となる。
また、本発明によれば、規制部に対する外側環状部の下端端面および内側環状部の下端端面の面圧が高くなり、外側環状部の下端端面および内側環状部の下端端面が上面に対して擦れることを抑制する上で有利となり、異音の発生を抑制する上でより有利となる。
また、本発明によれば、規制部と外側環状部および内側環状部との間に侵入した水を排水孔から排水路を介して防振基体の外部に排出することができ、弾性材の内側に配置されたリバウンドストッパやピストンロッドなど金属製の部材に対する錆の発生を抑制する上で有利となる。
また、本発明によれば、弾性材の下部から弾性材の内側への水の侵入を抑制する上で有利となり、弾性材の内側に配置されたリバウンドストッパやピストンロッドなど金属製の部材に対する錆の発生を抑制する上で有利となる。
また、本発明によれば、排水溝のポンプ作用により、凹溝内の水を防振基体の外部に排出することができ、弾性材の内側に配置されたリバウンドストッパやピストンロッドなど金属製の部材に対する錆の発生を抑制する上で有利となる。 According to the present invention, when the piston rod is displaced in a twisting direction so as to be inclined, the lower end face of the outer annular portion and the lower end end face of the inner annular portion are disposed at one place or the entire circumference of the elastic member, and the strut. The inner annular portion and the outer annular portion bend in a state where the upper surface of the inner peripheral portion of the house is in contact.
Therefore, the lower end end surface of the outer annular portion and the lower end end surface of the inner annular portion are suppressed from rubbing against the upper surface, and the generation of abnormal noise is suppressed.
Further , according to the present invention, the outer annular portion and the inner annular portion are easily bent, which is advantageous in suppressing the lower end end surface of the outer annular portion and the lower end end surface of the inner annular portion from rubbing against the upper surface. This is more advantageous in suppressing the occurrence.
Further , according to the present invention, the rigidity of the outer annular portion and the inner annular portion can be ensured, and the outer annular portion and the inner annular portion are less likely to buckle, which is more advantageous in suppressing the generation of abnormal noise.
Further , according to the present invention, the surface pressure of the lower end surface of the outer annular portion and the lower end surface of the inner annular portion with respect to the restricting portion increases, and the lower end end surface of the outer annular portion and the lower end end surface of the inner annular portion rub against the upper surface. This is advantageous for suppressing the occurrence of noise and more advantageous for suppressing the generation of abnormal noise.
Further , according to the present invention, water that has entered between the regulating portion, the outer annular portion, and the inner annular portion can be discharged from the drainage hole to the outside of the vibration-proof substrate via the drainage channel, It is advantageous in suppressing the occurrence of rust on a metal member such as a rebound stopper and a piston rod disposed on the surface.
Further , according to the present invention, it is advantageous in suppressing water intrusion from the lower part of the elastic material to the inside of the elastic material, and rusting against a metal member such as a rebound stopper and a piston rod arranged inside the elastic material. It is advantageous in suppressing the occurrence of
Further , according to the present invention, the water in the concave groove can be discharged to the outside of the vibration isolating base by the pumping action of the drainage groove, and a metal such as a rebound stopper or a piston rod disposed inside the elastic material. This is advantageous in suppressing the occurrence of rust on the member.

第１の実施の形態に係るサスペンション装置の構成を示す断面図である。It is sectional drawing which shows the structure of the suspension apparatus which concerns on 1st Embodiment. リバウンドストッパを下方から見た図である。It is the figure which looked at the rebound stopper from the lower part. （Ａ）は図２のＡＡ線断面図、（Ｂ）は図２のＢＢ線断面図である。(A) is the sectional view on the AA line of FIG. 2, (B) is the sectional view on the BB line of FIG. （Ａ）は第２の実施の形態に係るサスペンション装置におけるリバウンドストッパを下方から見た図、（Ｂ）は（Ａ）のＢＢ線断面図である。(A) is the figure which looked at the rebound stopper in the suspension apparatus which concerns on 2nd Embodiment from the downward direction, (B) is BB sectional drawing of (A). （Ａ）は第３の実施の形態に係るサスペンション装置におけるリバウンドストッパを下方から見た図、（Ｂ）は（Ａ）のＢＢ線断面図である。(A) is the figure which looked at the rebound stopper in the suspension apparatus which concerns on 3rd Embodiment from the downward direction, (B) is the BB sectional drawing of (A). （Ａ）は第４の実施の形態に係るサスペンション装置におけるリバウンドストッパを下方から見た図、（Ｂ）は（Ａ）のＢＢ線断面図である。(A) is the figure which looked at the rebound stopper in the suspension apparatus which concerns on 4th Embodiment from the downward direction, (B) is the BB sectional drawing of (A). （Ａ）は第５の実施の形態に係るサスペンション装置におけるリバウンドストッパを下方から見た図、（Ｂ）は（Ａ）のＢＢ線断面図である。(A) is the figure which looked at the rebound stopper in the suspension apparatus which concerns on 5th Embodiment from the downward direction, (B) is the BB sectional drawing of (A). 図５（Ａ）の要部拡大図である。It is a principal part enlarged view of FIG. 5 (A).

次に、本実施の形態の自動車のサスペンション装置について図面を参照して説明する。
図１に示すように、本実施の形態のサスペンション装置１０は、ストラット式サスペンション装置である。
サスペンション装置１０は、各車輪にそれぞれ１つずつ設置されており、図１は、前輪としての車輪（不図示）に設置されたサスペンション装置１０を示している。サスペンション装置１０は、ボディ１２を構成するストラットハウス１２Ａと車輪との間に設けられ、車輪を介して入力される荷重を吸収するとともに、ボディ１２のローリングやピッチングを抑制する機能を有している。
サスペンション装置１０は、ショックアブソーバ１４と、リバウンドストッパ１６と、アッパスプリングシート１８と、不図示のロアスプリングシートと、コイルスプリング２０と、ベアリング２２と、フランジ部材２４と、防振基体２６と、規制部２８とを含んで構成されている。 Next, the automobile suspension apparatus of the present embodiment will be described with reference to the drawings.
As shown in FIG. 1, the suspension device 10 of the present embodiment is a strut suspension device.
One suspension device 10 is installed on each wheel, and FIG. 1 shows the suspension device 10 installed on a wheel (not shown) as a front wheel. The suspension device 10 is provided between the strut house 12A constituting the body 12 and the wheels, and has a function of absorbing a load input through the wheels and suppressing rolling and pitching of the body 12. .
The suspension device 10 includes a shock absorber 14, a rebound stopper 16, an upper spring seat 18, a lower spring seat (not shown), a coil spring 20, a bearing 22, a flange member 24, a vibration isolating base 26, and a restriction. Part 28.

ショックアブソーバ１４は、ストラットハウス１２Ａと車輪との間に設けられ、不図示のシリンダとピストンロッド３２とを備えている。
ショックアブソーバ１４は、ピストンロッド３２を上向きにして配置され、シリンダの下部が車輪側に連結されている。
コイルスプリング２０は、ショックアブソーバ１４の周囲でアッパスプリングシート１８と、シリンダに取着された不図示のロアスプリングシートとの間に配置され、それらスプリングシートを離す方向に付勢している。 The shock absorber 14 is provided between the strut house 12A and the wheels, and includes a cylinder (not shown) and a piston rod 32.
The shock absorber 14 is disposed with the piston rod 32 facing upward, and the lower part of the cylinder is connected to the wheel side.
The coil spring 20 is disposed around the shock absorber 14 between an upper spring seat 18 and a lower spring seat (not shown) attached to the cylinder, and urges the spring seat in a direction to release the spring seat.

ピストンロッド３２は、その先端側の小径部３２０２と、小径部３２０２よりも外径が大きい大径部３２０４とを含んで構成され、小径部３２０２の先部はストラットハウス１２Ａのピストンロッド挿通孔１２０２を通りストラットハウス１２Ａの上方に突出している。
バンプストッパ３４の蛇腹状の中間部は、シリンダから突出するピストンロッド３２の大径部３２０４に嵌装され、バンプストッパ３４の上端は、アッパスプリングシート１８に当接可能に設けられ、バンプストッパ３４の下端は、シリンダの上端に当接可能に設けられている。 The piston rod 32 includes a small-diameter portion 3202 on the distal end side thereof and a large-diameter portion 3204 having an outer diameter larger than that of the small-diameter portion 3202, and the tip portion of the small-diameter portion 3202 is the piston rod insertion hole 1202 of the strut house 12A. And protrudes above the strut house 12A.
The bellows-shaped intermediate portion of the bump stopper 34 is fitted into a large diameter portion 3204 of the piston rod 32 protruding from the cylinder, and the upper end of the bump stopper 34 is provided so as to be able to contact the upper spring seat 18. The lower end of the cylinder is provided so as to be in contact with the upper end of the cylinder.

ベアリング２２は、大径部３２０４の小径部３２０２寄りの端部に配置され、ベアリング２２の下面にアッパスプリングシート１８の内周部が当接して配置されている。
ベアリング２２は、転舵時にアッパスプリングシート１８とフランジ部材２４の間で回転し、ピストンロッド３２を含むフランジ部材２４より上方の部品の回転を抑制する。
また、小径部３２０２の大径部３２０４寄りの端部にフランジ部材２４の内周部が配置され、下ナット３６により固定されている。
防振基体２６は、下ナット３６の周囲でフランジ部材２４の上面に配置されている。
防振基体２６は、衝撃緩和、微振動の吸収を行うものであり、ゴム等の弾性材料で形成されている。
防振基体２６のピストンロッド３２の小径部３２０２および下ナット３６が挿通される挿通孔２６０２の周囲の箇所である内周部２６０４は、外周部２６０６に比べて上面の高さが低く薄肉に形成されている。防振基体２６の内周部２６０４は、下ナット３６の周囲でフランジ部材２４の内周部２４０２と後述するリバウンドストッパ１６の内周部１６０４とにより挟持されている。
下ナット３６の上方に位置するピストンロッド３２の箇所には、ストラットハウス１２Ａの上面に当接してピストンロッド３２の位置を規制するリバウンドストッパ１６が配置されている。リバウンドストッパ１６は、下ナット３６の上端面上で上ナット３８により固定されている。リバウンドストッパ１６は、ピストンロッド３２の小径部３２０２が挿通される挿通孔１６０２の周囲の箇所である内周部１６０４と、内周部１６０４から起立する筒部１６０６と、筒部１６０６の上端から半径方向外側に環板状に延在する環板部１６０８とを有している。 The bearing 22 is disposed at an end portion of the large-diameter portion 3204 near the small-diameter portion 3202, and the inner peripheral portion of the upper spring seat 18 is disposed in contact with the lower surface of the bearing 22.
The bearing 22 rotates between the upper spring seat 18 and the flange member 24 at the time of turning, and suppresses rotation of components above the flange member 24 including the piston rod 32.
Further, the inner peripheral portion of the flange member 24 is disposed at the end of the small diameter portion 3202 near the large diameter portion 3204 and is fixed by the lower nut 36.
The anti-vibration base 26 is disposed on the upper surface of the flange member 24 around the lower nut 36.
The anti-vibration base 26 absorbs shock and absorbs fine vibrations, and is made of an elastic material such as rubber.
The inner peripheral portion 2604, which is a portion around the insertion hole 2602 through which the lower diameter portion 3202 of the piston rod 32 and the lower nut 36 are inserted, has a lower upper surface than the outer peripheral portion 2606, and is formed thin. Has been. An inner peripheral portion 2604 of the vibration isolation base 26 is sandwiched between an inner peripheral portion 2402 of the flange member 24 and an inner peripheral portion 1604 of the rebound stopper 16 described later around the lower nut 36.
A rebound stopper 16 that abuts the upper surface of the strut house 12A and regulates the position of the piston rod 32 is disposed at a position of the piston rod 32 that is located above the lower nut 36. The rebound stopper 16 is fixed on the upper end surface of the lower nut 36 by an upper nut 38. The rebound stopper 16 has an inner peripheral portion 1604 that is a portion around the insertion hole 1602 through which the small diameter portion 3202 of the piston rod 32 is inserted, a cylindrical portion 1606 that stands up from the inner peripheral portion 1604, and a radius from the upper end of the cylindrical portion 1606. An annular plate portion 1608 extending in an annular plate shape is provided on the outer side in the direction.

また、防振基体２６の外周部２６０６の上面に、ストラットハウス１２Ａ（ボディ１２）の下面が当接している。より詳細には、ストラットハウス１２Ａの挿通孔１６０２の周囲の箇所に、上方に膨出するよう形成された規制部２８が設けられており、防振基体２６の外周部２６０６の上面に、ピストンロッド挿通孔１２０２の周囲の規制部２８の内周部１２０４の下面が当接している。
規制部２８は、ピストンロッド３２の半径方向への防振基体２６の変位と、上方への防振基体２６の変位を規制するものであり、これによりピストンロッド３２の半径方向への変位と上方への変位を規制する。
ピストンロッド３２の小径部３２０２の端部にキャップ４０が嵌合されて配置されている。 Further, the lower surface of the strut house 12 A (body 12) is in contact with the upper surface of the outer peripheral portion 2606 of the vibration isolation base 26. More specifically, a restricting portion 28 formed so as to bulge upward is provided at a location around the insertion hole 1602 of the strut house 12A, and a piston rod is provided on the upper surface of the outer peripheral portion 2606 of the vibration-isolating base 26. The lower surface of the inner peripheral portion 1204 of the restricting portion 28 around the insertion hole 1202 is in contact.
The restricting portion 28 restricts the displacement of the vibration isolation base 26 in the radial direction of the piston rod 32 and the displacement of the vibration isolation base 26 in the upward direction, whereby the displacement and upward of the piston rod 32 in the radial direction are controlled. Regulate the displacement to.
A cap 40 is fitted and disposed at the end of the small diameter portion 3202 of the piston rod 32.

ピストンロッド３２の下ナット３６の上方に位置する箇所には、ストラットハウス１２Ａの上面、具体的には、規制部２８の内周部１２０４の上面に当接してピストンロッド３２の位置を規制するリバウンドストッパ１６が配置されている。
リバウンドストッパ１６は、下ナット３６の上端面上で上ナット３８により固定されている。
リバウンドストッパ１６は、ピストンロッド３２の小径部３２０２が挿通される挿通孔１６０２の周囲の箇所である内周部１６０４と、内周部１６０４から起立する筒部１６０６と、筒部１６０６の上端から半径方向外側に環板状に延在する環板部１６０８と、環板部１６０８の全周にわたって設けられた弾性材３０とを含んで構成されている。 A rebound that restricts the position of the piston rod 32 by contacting the upper surface of the strut house 12A, specifically, the upper surface of the inner peripheral portion 1204 of the restricting portion 28, is located above the lower nut 36 of the piston rod 32. A stopper 16 is arranged.
The rebound stopper 16 is fixed on the upper end surface of the lower nut 36 by an upper nut 38.
The rebound stopper 16 has an inner peripheral portion 1604 that is a portion around the insertion hole 1602 through which the small diameter portion 3202 of the piston rod 32 is inserted, a cylindrical portion 1606 that stands up from the inner peripheral portion 1604, and a radius from the upper end of the cylindrical portion 1606. An annular plate portion 1608 extending in an annular plate shape on the outer side in the direction and an elastic material 30 provided over the entire circumference of the annular plate portion 1608 are configured.

弾性材３０は、ゴム等の弾性材料で形成されている。
弾性材３０は、リバウンドストッパ１６の環板部１６０８が嵌合される嵌合溝３００２が形成された上部３０Ａと、下部３０Ｂとを有している。
したがって、弾性材３０の下部３０Ｂがストラットハウス１２Ａの規制部２８の内周部１２０４の上面１２１０に弾接することでピストンロッド３２の下方への変位を制限する。
図１、図２に示すように、弾性材３０の下部３０Ｂは、環板部１６０８の下面の外周部の全周にわたって延在する外側環状部４２と、外側環状部４２の半径方向内側で環板部１６０８の下面の全周にわたって延在する内側環状部４４と、外側環状部４２と内側環状部４４との間でそれら外側環状部４２および内側環状部４４の全周にわたって延在する凹溝４６とを含んで構成されている。
本実施の形態では、外側環状部４２、内側環状部４４、凹溝４６は、それぞれ均一の幅で環状に形成されている。 The elastic material 30 is formed of an elastic material such as rubber.
The elastic member 30 has an upper part 30A in which a fitting groove 3002 in which the annular plate part 1608 of the rebound stopper 16 is fitted is formed, and a lower part 30B.
Therefore, the lower portion 30B of the elastic member 30 elastically contacts the upper surface 1210 of the inner peripheral portion 1204 of the restricting portion 28 of the strut house 12A, thereby limiting the downward displacement of the piston rod 32.
As shown in FIGS. 1 and 2, the lower portion 30 B of the elastic member 30 includes an outer annular portion 42 that extends over the entire circumference of the outer peripheral portion of the lower surface of the annular plate portion 1608, and a ring on the radially inner side of the outer annular portion 42. An inner annular portion 44 extending over the entire circumference of the lower surface of the plate portion 1608, and a concave groove extending between the outer annular portion 42 and the inner annular portion 44 over the entire circumference of the outer annular portion 42 and the inner annular portion 44. 46.
In the present embodiment, the outer annular portion 42, the inner annular portion 44, and the concave groove 46 are each formed in an annular shape with a uniform width.

図３（Ａ）、（Ｂ）に示すように、外側環状部４２および内側環状部４４は、ピストンロッド３２の半径方向に沿った幅と、ピストンロッド３２の軸心方向と平行する方向に沿った高さとを有し、高さは幅よりも大きな寸法で形成されている。
また、図２、図３（Ｂ）に示すように、凹溝４６の底面で凹溝４６の周方向に間隔をおいた複数箇所に外側環状部４２と内側環状部４４とにわたって延在するリブ４８が膨出形成されている。
図１に示すように、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２は、ストラットハウス１２Ａの内周部１２０４の上面１２１０に当接可能に設けられている。
本実施の形態では、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２と、ストラットハウス１２Ａの内周部１２０４の上面１２１０とが常時当接している場合について説明するが、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２と、ストラットハウス１２Ａの内周部１２０４の上面１２１０との間に常時隙間が形成されていてもよい。 As shown in FIGS. 3A and 3B, the outer annular portion 42 and the inner annular portion 44 have a width along the radial direction of the piston rod 32 and a direction parallel to the axial direction of the piston rod 32. The height is formed with a dimension larger than the width.
As shown in FIGS. 2 and 3B, ribs extending across the outer annular portion 42 and the inner annular portion 44 at a plurality of locations spaced in the circumferential direction of the concave groove 46 on the bottom surface of the concave groove 46. 48 is formed to bulge.
As shown in FIG. 1, a lower end end surface 4202 of the outer annular portion 42 and a lower end end surface 4402 of the inner annular portion 44 are provided so as to be able to contact the upper surface 1210 of the inner peripheral portion 1204 of the strut house 12A.
In the present embodiment, a case where the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 are always in contact with the upper surface 1210 of the inner peripheral portion 1204 of the strut house 12A will be described. A gap may always be formed between the lower end end surface 4202 of the annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 and the upper surface 1210 of the inner peripheral portion 1204 of the strut house 12A.

次に作用効果について説明する。
車両走行時、車輪が凹部に落ちるなどしてピストンロッド３２が下方に過大に変位すると、リバウンドストッパ１６の弾性材３０の外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２と、ストラットハウス１２Ａの内周部１２０４の上面１２１０とが当接することで、ピストンロッド３２の下方への変位が規制され、防振基体２６がボディ１２から離間してショックアブソーバ１４すなわちサスペンション装置１０が脱落することが防止される。
一方、旋回時に車輪が左右に動きピストンロッド３２が斜めに傾くようなこじれ方向に変位したとき、弾性材３０の周方向の一箇所、あるいは全周において、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２と、ストラットハウス１２Ａの内周部１２０４の上面１２１０とが当接した状態で外側環状部４２および内側環状部４４が撓む。
すなわち、弾性材３０がストラットハウス１２Ａの内周部１２０４の上面１２１０に当接する部分は、リバウンドストッパ１６の半径方向において分割され切り離された外側環状部４２と内側環状部４４とで構成されているため、外側環状部４２および内側環状部４４はリバウンドストッパ１６の半径方向に撓み易く、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２と、ストラットハウス１２Ａの内周部１２０４の上面１２１０とが当接した状態で外側環状部４２および内側環状部４４が撓む。
したがって、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２が上面に対して擦れることが抑制され、異音の発生が抑制される。
また、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２がストラットハウス１２Ａの上面１２１０に対して擦れることが抑制されるため、ストラットハウス１２Ａの上面に防錆塗料の塗膜が形成されている場合、塗膜に対して損傷を与えることが抑制され、塗膜の耐久性を高める上で有利となる。
また、リバウンドストッパ１６に衝撃が作用した際、外側環状部４２および内側環状部４４が撓んでばねとして作用することから、衝撃の緩和を図れ、乗り心地の向上を図る上で有利となる。 Next, the function and effect will be described.
When the piston rod 32 is excessively displaced downward due to a wheel falling into a recess during traveling of the vehicle, the lower end end surface 4202 of the outer annular portion 42 of the elastic member 30 of the rebound stopper 16 and the lower end end surface 4402 of the inner annular portion 44; By contacting the upper surface 1210 of the inner peripheral portion 1204 of the strut house 12A, the downward displacement of the piston rod 32 is restricted, the vibration isolating base 26 is separated from the body 12, and the shock absorber 14, that is, the suspension device 10 is dropped. Is prevented.
On the other hand, when the wheel moves to the left and right during turning and the piston rod 32 is displaced in a twisting direction so as to be inclined, the lower end face 4202 and the inner side of the outer annular portion 42 are located at one place or the entire circumference of the elastic member 30. The outer annular portion 42 and the inner annular portion 44 bend in a state where the lower end end surface 4402 of the annular portion 44 and the upper surface 1210 of the inner peripheral portion 1204 of the strut house 12A are in contact with each other.
That is, the portion where the elastic member 30 abuts on the upper surface 1210 of the inner peripheral portion 1204 of the strut house 12A is constituted by the outer annular portion 42 and the inner annular portion 44 that are divided and separated in the radial direction of the rebound stopper 16. Therefore, the outer annular portion 42 and the inner annular portion 44 are easily bent in the radial direction of the rebound stopper 16, and the lower end end surface 4202 of the outer annular portion 42, the lower end end surface 4402 of the inner annular portion 44, and the inner peripheral portion 1204 of the strut house 12A. The outer annular portion 42 and the inner annular portion 44 bend in a state where the upper surface 1210 is in contact.
Therefore, the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 are suppressed from rubbing against the upper surface, and the generation of abnormal noise is suppressed.
Further, since the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 are suppressed from rubbing against the upper surface 1210 of the strut house 12A, a coating film of a rust preventive paint is applied to the upper surface of the strut house 12A. When it is formed, damage to the coating film is suppressed, which is advantageous in increasing the durability of the coating film.
In addition, when an impact is applied to the rebound stopper 16, the outer annular portion 42 and the inner annular portion 44 bend and act as a spring, so that the impact can be mitigated, which is advantageous in improving riding comfort.

また、本実施の形態では、外側環状部４２および内側環状部４４の高さは幅よりも大きな寸法で形成されているので、外側環状部４２および内側環状部４４は撓み易く、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２がストラットハウス１２Ａの上面１２１０に対して擦れることを抑制する上で有利となり、異音の発生を抑制する上でより有利となる。 In the present embodiment, since the height of the outer annular portion 42 and the inner annular portion 44 is larger than the width, the outer annular portion 42 and the inner annular portion 44 are easily bent, and the outer annular portion 42 is easily bent. The lower end end surface 4202 of the inner ring portion 44 and the lower end end surface 4402 of the inner annular portion 44 are advantageous in suppressing the rubbing against the upper surface 1210 of the strut house 12A, and more advantageous in suppressing the generation of abnormal noise.

また、本実施の形態では、凹溝４６の底面で凹溝４６の周方向に間隔をおいた複数箇所に外側環状部４２と内側環状部４４とにわたって延在するリブ４８が膨出形成されているので、外側環状部４２および内側環状部４４の剛性を確保でき、外側環状部４２および内側環状部４４が座屈しにくくなるため、異音の発生を抑制する上でより有利となる。 Further, in the present embodiment, ribs 48 extending from the outer annular portion 42 and the inner annular portion 44 are bulged and formed at a plurality of locations spaced in the circumferential direction of the concave groove 46 on the bottom surface of the concave groove 46. Therefore, the rigidity of the outer annular portion 42 and the inner annular portion 44 can be secured, and the outer annular portion 42 and the inner annular portion 44 are less likely to buckle, which is more advantageous in suppressing the occurrence of abnormal noise.

（第２の実施の形態）
なお、以下の実施の形態では、第１の実施の形態と同様の部分、部材については第１の実施の形態と同一の符号を付してその説明を省略する。
第２の実施の形態では、図４（Ａ）、（Ｂ）に示すように、第１の実施の形態に凹凸構造５０を加えたものである。
凹凸構造５０は、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２に設けられ、規制部２８との接触面積を減少させている。
この実施の形態では、外側環状部４２の下端端面４２０２の幅方向の中央部に外側環状部４２の全周に沿って延在する環状溝５２を設け、内側環状部４４の下端端面４４０２の幅方向の中央部に内側環状部４４の全周に沿って延在する環状溝５２を設け、それら環状溝５２により凹凸構造５０を構成している。
第２の実施の形態によれば、第１の実施の形態の効果に加え、ストラットハウス１２Ａの内周部１２０４の上面１２１０に対する外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２の面圧が高くなり、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２が上面１２１０に対して擦れることを抑制する上で有利となり、異音の発生を抑制する上でより有利となる。
なお、凹凸構造５０は、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２の双方に周方向に間隔をおいて設けた複数の凹部で構成するなど様々な構造が考えられ、実施の形態の構造に限定されない。 (Second Embodiment)
In the following embodiments, the same parts and members as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.
In the second embodiment, as shown in FIGS. 4A and 4B, an uneven structure 50 is added to the first embodiment.
The concavo-convex structure 50 is provided on the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 to reduce the contact area with the restricting portion 28.
In this embodiment, an annular groove 52 extending along the entire circumference of the outer annular portion 42 is provided in the center in the width direction of the lower end end surface 4202 of the outer annular portion 42, and the width of the lower end end surface 4402 of the inner annular portion 44 is provided. An annular groove 52 extending along the entire circumference of the inner annular portion 44 is provided at the central portion in the direction, and the concavo-convex structure 50 is configured by these annular grooves 52.
According to the second embodiment, in addition to the effects of the first embodiment, the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 with respect to the upper surface 1210 of the inner peripheral portion 1204 of the strut house 12A. The surface pressure of the outer annular portion 42 is increased, and the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 are advantageously prevented from rubbing against the upper surface 1210. It will be advantageous.
It is to be noted that the concavo-convex structure 50 may have various structures such as a plurality of concave portions provided at intervals in the circumferential direction on both the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44. It is not limited to the structure of the embodiment.

（第３の実施の形態）
第３の実施の形態では、図５（Ａ）、（Ｂ）に示すように、第１の実施の形態に排水孔５４、排水路５６を加えたものである。
排水孔５４は、凹溝４６に対向するストラットハウス１２Ａの内周部１２０４に、内周部１２０４の周方向に間隔をおいて複数設けられている。
排水路５６は、排水孔５４に対向する防振基体２６の箇所に、排水孔５４内の水を防振基体２６の下部３０Ｂから防振基体２６外へ導くように形成されている。
第３の実施の形態によれば、ストラットハウス１２Ａの上面１２１０と、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２との間に水が侵入した場合、その水を排水孔５４から排水路５６を介して防振基体２６の外部に排出することができ、弾性材３０の内側に配置されたリバウンドストッパ１６やピストンロッド３２など金属製の部材に対する錆の発生を抑制する上で有利となる。 (Third embodiment)
In the third embodiment, as shown in FIGS. 5A and 5B, a drain hole 54 and a drain channel 56 are added to the first embodiment.
A plurality of drain holes 54 are provided in the inner peripheral portion 1204 of the strut house 12 A facing the concave groove 46 at intervals in the circumferential direction of the inner peripheral portion 1204.
The drainage channel 56 is formed at a position of the vibration isolation base 26 facing the drainage hole 54 so as to guide the water in the drainage hole 54 from the lower portion 30 B of the vibration isolation base 26 to the outside of the vibration isolation base 26.
According to the third embodiment, when water enters between the upper surface 1210 of the strut house 12A and the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44, the water is drained. 54 can be discharged from the anti-vibration base 26 through the drainage channel 56, and the generation of rust on the metal member such as the rebound stopper 16 and the piston rod 32 disposed inside the elastic member 30 is suppressed. Is advantageous.

（第４の実施の形態）
第４の実施の形態は、図６（Ａ）、（Ｂ）に示すように、第１の実施の形態にリップ部５８を加えたものである。
リップ部５８は、内側環状部４４または外側環状部４２の少なくとも一方に、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２が規制部２８に接触した状態で規制部２８に弾接するように設けられている。本実施の形態では、リップ部５８は、内側環状部４４の下端端面４４０２の外周部および外側環状部４２の外周部にそれぞれ設けられ、それぞれ外側環状部４２および内側環状部４４の全周にわたって延在している。
第４の実施の形態によれば、外側環状部４２の下端端面４２０２および内側環状部４４の下端端面４４０２がストラットハウス１２Ａの上面１２１０に当接するとともに、リップ部５８がストラットハウス１２Ａの上面１２１０に弾接するため、弾性材３０の下部３０Ｂから弾性材３０の内側への水の侵入を抑制する上で有利となり、弾性材３０の内側に配置されたリバウンドストッパ１６やピストンロッド３２など金属製の部材に対する錆の発生を抑制する上で有利となる。 (Fourth embodiment)
In the fourth embodiment, as shown in FIGS. 6A and 6B, a lip portion 58 is added to the first embodiment.
The lip portion 58 is elastically applied to at least one of the inner annular portion 44 and the outer annular portion 42 with the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 in contact with the restricting portion 28. It is provided to touch. In the present embodiment, the lip portion 58 is provided on the outer peripheral portion of the lower end surface 4402 of the inner annular portion 44 and the outer peripheral portion of the outer annular portion 42, respectively, and extends over the entire circumference of the outer annular portion 42 and the inner annular portion 44, respectively. Exist.
According to the fourth embodiment, the lower end end surface 4202 of the outer annular portion 42 and the lower end end surface 4402 of the inner annular portion 44 abut against the upper surface 1210 of the strut house 12A, and the lip portion 58 contacts the upper surface 1210 of the strut house 12A. Since it is elastically contacted, it is advantageous in suppressing the intrusion of water from the lower portion 30B of the elastic member 30 to the inside of the elastic member 30, and a metal member such as the rebound stopper 16 and the piston rod 32 disposed inside the elastic member 30. This is advantageous in suppressing the generation of rust.

（第５の実施の形態）
第５の実施の形態は、図７（Ａ）、（Ｂ）、図８に示すように、第１の実施の形態に、ポンプ作用を奏する排水溝６０を加えたものである。
排水溝６０は、外側環状部４２の下端端面４２０２の周方向に間隔をおいた複数箇所に、外側環状部４２の径方向に延在し凹溝４６と外側環状部４２の外周面４２１０とを連通しており、凹溝４６よりも深さが浅く形成されている。
排水溝６０は、凹溝４６側に位置する幅広部６００２と、外周面側に位置し幅広部６００２に連通する幅広部６００２よりも小さい幅の幅狭部６００４とを含んで形成されている。
本実施の形態では、幅広部６００２と幅狭部６００４との間に、幅狭部６００４に近づくにつれて次第に幅が狭くなる傾斜部６００６が設けられている。
また、幅狭部６００４の外周面４２１０側の先端部は、外側環状部４２の外周面４２１０から膨出された膨出部６００８の内側に形成されている。
第５の実施の形態によれば、凹溝４６に水が侵入した場合、弾性材３０の下部３０Ｂが圧縮されると、排水溝６０の体積が減少し、排水溝６０から凹溝４６内の水を弾性材３０の下部３０Ｂの外側に排出する。
また、弾性材３０の下部３０Ｂの圧縮が解除され、弾性材３０の下部３０Ｂが元の形状に復帰すると、排水溝６０の体積が増大し、凹溝４６内の水を排水溝６０に取り込む。
このような排水溝６０のポンプ作用により、凹溝４６内の水を防振基体２６の外部に排出することができ、弾性材３０の内側に配置されたリバウンドストッパ１６やピストンロッド３２など金属製の部材に対する錆の発生を抑制する上で有利となる。 (Fifth embodiment)
As shown in FIGS. 7A, 7 B, and 8, the fifth embodiment is obtained by adding a drain groove 60 having a pump action to the first embodiment.
The drainage groove 60 extends in the radial direction of the outer annular portion 42 at a plurality of locations spaced in the circumferential direction of the lower end surface 4202 of the outer annular portion 42, and has a concave groove 46 and an outer peripheral surface 4210 of the outer annular portion 42. It communicates and is formed to be shallower than the concave groove 46.
The drainage groove 60 is formed to include a wide portion 6002 located on the concave groove 46 side and a narrow portion 6004 having a width smaller than the wide portion 6002 located on the outer peripheral surface side and communicating with the wide portion 6002.
In this embodiment, an inclined portion 6006 that gradually decreases in width as it approaches the narrow portion 6004 is provided between the wide portion 6002 and the narrow portion 6004.
Further, the distal end portion of the narrow portion 6004 on the outer peripheral surface 4210 side is formed inside a bulging portion 6008 bulging from the outer peripheral surface 4210 of the outer annular portion 42.
According to the fifth embodiment, when water enters the concave groove 46, when the lower portion 30 B of the elastic material 30 is compressed, the volume of the drainage groove 60 decreases, and the drainage groove 60 extends into the concave groove 46. Water is discharged to the outside of the lower portion 30B of the elastic member 30.
When the compression of the lower portion 30B of the elastic member 30 is released and the lower portion 30B of the elastic member 30 returns to its original shape, the volume of the drainage groove 60 increases and the water in the concave groove 46 is taken into the drainage groove 60.
By such a pumping action of the drainage groove 60, the water in the concave groove 46 can be discharged to the outside of the vibration isolation base 26, and is made of metal such as the rebound stopper 16 and the piston rod 32 disposed inside the elastic material 30. This is advantageous in suppressing the occurrence of rust on the member.

１０サスペンション装置
１２ボディ
１２Ａストラットハウス
１４ショックアブソーバ
１６リバウンドストッパ
１８アッパスプリングシート
２６防振基体
２８規制部
３０弾性材
３２ピストンロッド
４２外側環状部
４２０２下端端面
４２１０外周面
４４内側環状部
４４０２下端端面
４６凹溝
４８リブ
５０凹凸構造
５４排水孔
５６排水路
５８リップ部
６０排水溝
６００２幅広部
６００４幅狭部 DESCRIPTION OF SYMBOLS 10 Suspension apparatus 12 Body 12A Strut house 14 Shock absorber 16 Rebound stopper 18 Upper spring seat 26 Anti-vibration base 28 Restriction part 30 Elastic material 32 Piston rod 42 Outer annular part 4202 Lower end face 4210 Outer peripheral face 44 Inner annular part 4402 Lower end end face 46 Concave Groove 48 Rib 50 Uneven structure 54 Drain hole 56 Drain channel 58 Lip part 60 Drain groove 6002 Wide part 6004 Narrow part

Claims

A shock absorber which is arranged with the piston rod facing upward and the lower part of the cylinder is connected to the wheel side;
An anti-vibration base that is attached to the top of the piston rod and abuts against the body;
A restricting portion that is formed in the body and restricts the displacement of the vibration-proof base in the radial direction and upward of the piston rod;
An annular plate portion that is attached to the upper portion of the piston rod and extends around the piston rod above the restricting portion, and an elastic material that is disposed on the lower surface of the annular plate portion and elastically contacts the restricting portion. And a rebound stopper that limits the downward displacement of the piston rod;
A suspension device comprising:
The elastic material includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, an inner annular portion extending over the entire circumference of the lower surface on the radial inner side of the outer annular portion, and the outer annular portion. A groove extending between the inner annular portion and the outer annular portion and the entire inner annular portion .
Ribs extending over the outer annular portion and the inner annular portion are bulged at a plurality of locations spaced in the circumferential direction of the concave groove on the bottom surface of the concave groove,
A suspension device characterized by that.

A shock absorber which is arranged with the piston rod facing upward and the lower part of the cylinder is connected to the wheel side;
An anti-vibration base that is attached to the top of the piston rod and abuts against the body;
A restricting portion that is formed in the body and restricts the displacement of the vibration-proof base in the radial direction and upward of the piston rod;
An annular plate portion that is attached to the upper portion of the piston rod and extends around the piston rod above the restricting portion, and an elastic material that is disposed on the lower surface of the annular plate portion and elastically contacts the restricting portion. And a rebound stopper that limits the downward displacement of the piston rod;
A suspension device comprising:
The elastic material includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, an inner annular portion extending over the entire circumference of the lower surface on the radial inner side of the outer annular portion, and the outer annular portion. A groove extending between the inner annular portion and the outer annular portion and the entire inner annular portion .
A concavo-convex structure for reducing a contact area with the restricting portion is formed on a lower end end surface of the outer annular portion and a lower end end surface of the inner annular portion,
A suspension device characterized by that.

A shock absorber which is arranged with the piston rod facing upward and the lower part of the cylinder is connected to the wheel side;
An anti-vibration base that is attached to the top of the piston rod and abuts against the body;
A restricting portion that is formed in the body and restricts the displacement of the vibration-proof base in the radial direction and upward of the piston rod;
An annular plate portion that is attached to the upper portion of the piston rod and extends around the piston rod above the restricting portion, and an elastic material that is disposed on the lower surface of the annular plate portion and elastically contacts the restricting portion. And a rebound stopper that limits the downward displacement of the piston rod;
A suspension device comprising:
The elastic material includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, an inner annular portion extending over the entire circumference of the lower surface on the radial inner side of the outer annular portion, and the outer annular portion. A groove extending between the inner annular portion and the outer annular portion and the entire inner annular portion .
A plurality of drain holes are formed in the annular portion of the restricting portion facing the concave groove at intervals in the circumferential direction of the annular portion,
A drainage channel that guides the water in the drainage hole from the lower part of the anti-vibration base to the outside of the anti-vibration base is formed at the location of the anti-vibration base facing the drainage hole.
A suspension device characterized by that.

A shock absorber which is arranged with the piston rod facing upward and the lower part of the cylinder is connected to the wheel side;
An anti-vibration base that is attached to the top of the piston rod and abuts against the body;
A restricting portion that is formed in the body and restricts the displacement of the vibration-proof base in the radial direction and upward of the piston rod;
An annular plate portion that is attached to the upper portion of the piston rod and extends around the piston rod above the restricting portion, and an elastic material that is disposed on the lower surface of the annular plate portion and elastically contacts the restricting portion. And a rebound stopper that limits the downward displacement of the piston rod;
A suspension device comprising:
The elastic material includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, an inner annular portion extending over the entire circumference of the lower surface on the radial inner side of the outer annular portion, and the outer annular portion. A groove extending between the inner annular portion and the outer annular portion and the entire inner annular portion .
At least one of the outer annular portion or the inner annular portion is provided with a lip portion that elastically contacts the restricting portion in a state where the lower end end surface of the outer annular portion and the lower end end surface of the inner annular portion are in contact with the restricting portion. Yes,
A suspension device characterized by that.

A shock absorber which is arranged with the piston rod facing upward and the lower part of the cylinder is connected to the wheel side;
An anti-vibration base that is attached to the top of the piston rod and abuts against the body;
A restricting portion that is formed in the body and restricts the displacement of the vibration-proof base in the radial direction and upward of the piston rod;
An annular plate portion that is attached to the upper portion of the piston rod and extends around the piston rod above the restricting portion, and an elastic material that is disposed on the lower surface of the annular plate portion and elastically contacts the restricting portion. And a rebound stopper that limits the downward displacement of the piston rod;
A suspension device comprising:
The elastic material includes an outer annular portion extending over the entire circumference of the outer peripheral portion of the lower surface, an inner annular portion extending over the entire circumference of the lower surface on the radial inner side of the outer annular portion, and the outer annular portion. A groove extending between the inner annular portion and the outer annular portion and the entire inner annular portion .
In a plurality of locations spaced in the circumferential direction of the lower end surface of the outer annular portion, there are provided drainage grooves that communicate with the outer circumferential surface of the outer annular portion and the concave groove that is shallower than the concave groove,
The drainage groove is formed including a wide portion located on the concave groove side and a narrow portion having a width smaller than the wide portion located on the outer peripheral surface side and communicating with the wide portion.
A suspension device characterized by that.

The outer annular portion and the inner annular portion have a width along a radial direction of the piston rod and a height along a direction parallel to the axial direction of the piston rod,
The height is formed with a dimension larger than the width,
The suspension device according to any one of claims 1 to 5, wherein