JP2005265091A - Bump stopper for hydraulic shock absorber - Google Patents

Bump stopper for hydraulic shock absorber Download PDF

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JP2005265091A
JP2005265091A JP2004080115A JP2004080115A JP2005265091A JP 2005265091 A JP2005265091 A JP 2005265091A JP 2004080115 A JP2004080115 A JP 2004080115A JP 2004080115 A JP2004080115 A JP 2004080115A JP 2005265091 A JP2005265091 A JP 2005265091A
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shock absorber
bump stopper
discharge port
cap body
hydraulic shock
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JP4198621B2 (en
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Kenji Kitamura
健司 北村
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KYB Corp
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Kayaba Industry Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To surely drain muddy water or dust entering into a bump stopper to the outside. <P>SOLUTION: The bump stopper is formed by mounting a tubular cap body 31 with its top closed facing a bump cushion to an end of a shock absorber body 29. The cap body 31 is constituted of: a bottom part 31a; a cylinder part 39 continuous to the bottom part 31a; recesses 34 which is separately and circumferentially formed by setting down a plurality of portions of corner parts in which the bottom part 31a intersects with the cylinder part 39; an insertion hole 33 formed at the center of the bottom part 31a for inserting a piston rod; and a plurality of drain outlets 38 disposed to the cylinder part 39 on both sides of each recess 34. A side face 37 on an inner peripheral side of a recess wall 35 defining the recess 34 is formed in a linear shape or a tapered shape to be directly continuous to a rim of the drain outlet 38. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、油圧緩衝器本体に取り付けられるバンプストッパに関わり、詳しくは、バンプストッパ内部に侵入してきた泥水やダスト等を確実に外部に排出することができる構造に関する。   The present invention relates to a bump stopper attached to a hydraulic shock absorber body, and more particularly to a structure that can reliably discharge muddy water, dust, and the like that have entered the bump stopper.

従来より、ピストンロッド側に設けたバンプクッションと衝突してそれを押し縮めながら最圧縮時に発生する衝撃を吸収するために緩衝器本体側に設けられたバンプストッパとしては、特許文献１に示すものを例示することができる。   Conventionally, the bump stopper provided on the shock absorber body side to absorb the impact generated at the time of the maximum compression while colliding with the bump cushion provided on the piston rod side and compressing it is shown in Patent Document 1 Can be illustrated.

図４に示すように、このバンプストッパ５は、プレス加工によって逆有底筒状をなすキャップ体６を形成し、このキャップ体６の低部コーナー部を同じくプレス加工により放射状に凹まして窪み７を作り、これらの窪み７で低部内側から下方へと向かって膨出した複数個の窪み壁８を形成してそれぞれの下端面を係止段部９としている。   As shown in FIG. 4, the bump stopper 5 forms a cap body 6 having an inverted bottomed cylindrical shape by pressing, and the lower corner portion of the cap body 6 is also radially depressed by pressing to form a depression 7. These recesses 7 form a plurality of recess walls 8 that bulge downward from the inside of the lower portion, and the lower end surfaces of the recess walls 9 serve as locking step portions 9.

キャップ体６の筒部１０には上記窪み壁８と円周方向に並べて内外へと通じる複数の排出口１１が形成されると共に、キャップ体６の中央にはピストンロッド２を通す挿通孔１２が設けられている。   A plurality of discharge ports 11 are formed in the cylindrical portion 10 of the cap body 6 so as to be arranged in the circumferential direction with the hollow wall 8 and communicate with the inside and outside, and an insertion hole 12 through which the piston rod 2 passes is formed in the center of the cap body 6. Is provided.

そして、この挿通孔１２をピストンロッド２に通してバンプストッパ５を緩衝器本体４の上部に嵌合させると共に、窪み壁８の下端面である係止段部９を緩衝器本体４の上面に押し当てることにより、この緩衝器本体４の側面で排出口１１を塞ぐことなく開口状態を保ったまま緩衝器本体４の上面との間に空間部１３を残して上記バンプストッパ５が取り付けられる。   Then, the insertion hole 12 is passed through the piston rod 2 so that the bump stopper 5 is fitted to the upper part of the shock absorber main body 4, and the locking step portion 9 which is the lower end surface of the hollow wall 8 is formed on the upper surface of the shock absorber main body 4. By pressing, the bump stopper 5 is attached to the upper surface of the shock absorber main body 4 while leaving the open state without blocking the discharge port 11 on the side surface of the shock absorber main body 4.

このように構成されたバンプストッパ５を備えた油圧緩衝器を自動車等の車両に使用した場合には、走行中に跳ね上げた泥水やダスト等が挿通孔１２を介して緩衝器本体４のオイル兼ダストシール１４の上面に侵入したとしても、これら泥水やダスト等は矢印Ｘで示すように、緩衝器本体４とバンプストッパ５との間の空間部１３から排出口１１を通して速やかに外部へと排出されるようになっている。
特開２０００−８１０７５（図５） When the hydraulic shock absorber provided with the bump stopper 5 configured as described above is used in a vehicle such as an automobile, muddy water, dust, etc. splashed during traveling is oil in the shock absorber body 4 through the insertion hole 12. Even if it enters the top surface of the dust seal 14, these muddy water, dust, etc. are quickly discharged to the outside through the discharge port 11 from the space 13 between the shock absorber body 4 and the bump stopper 5 as indicated by the arrow X. It has come to be.
JP 2000-81075 (FIG. 5)

上記のように構成されたストラット型の油圧緩衝器においては、特に問題がある訳ではないが、以下に示す課題の発生が考えられる。   The strut type hydraulic shock absorber configured as described above is not particularly problematic, but the following problems may occur.

即ち、図５に示すように、窪み壁８と円周方向に並べて設けられた排出口１１は長方形状をなすと共に、図６に示すように、隣り合う窪み壁８の真中に配置されているので、筒部１０の内周面と窪み壁８の側面８ａとが交わって出来る交線Ｐと、排出口１１の縦側開口端部となる短辺１２ａとの間には筒部１０の内周面が壁部１５として存在する。   That is, as shown in FIG. 5, the discharge port 11 provided side by side in the circumferential direction with the hollow wall 8 has a rectangular shape and is disposed in the middle of the adjacent hollow walls 8 as shown in FIG. 6. Therefore, between the intersection line P formed by the inner peripheral surface of the cylindrical portion 10 and the side surface 8a of the hollow wall 8 and the short side 12a which is the vertical opening end of the discharge port 11, the inside of the cylindrical portion 10 A peripheral surface exists as the wall portion 15.

この壁部１５は、窪み壁８の側面８ａとでデッドスペースとなる凹部１６を形成するので、上記した泥水やダスト等が排出口１１から出る際にその一部が凹部１６に溜まることが考えられる。   Since this wall 15 forms a concave portion 16 which becomes a dead space with the side surface 8a of the hollow wall 8, it is considered that a part of the wall 15 accumulates in the concave portion 16 when the muddy water, dust, etc. exit from the discharge port 11. It is done.

この場合、凹部１６に溜まった泥水やダスト等が緩衝器本体４を腐蝕させる原因となったり、オイル兼ダストシール１４部分に付着してピストンロッド２を傷付けたりすることが危惧される。   In this case, it is feared that muddy water, dust or the like accumulated in the recess 16 may cause the shock absorber body 4 to be corroded or adhere to the oil / dust seal 14 portion and damage the piston rod 2.

そこで、本発明は、上記の問題点を解決するために創案されたものであって、その目的は、バンプストッパ内部に侵入してきた泥水やダスト等を確実に外部に排出することができる構造を備えた油圧緩衝器のバンプストッパを提供することである。   Therefore, the present invention was devised to solve the above problems, and its purpose is to provide a structure that can surely discharge muddy water, dust, etc. that have entered the bump stopper to the outside. A bump stopper for a hydraulic shock absorber is provided.

上記の目的を達成するため、本発明の手段は、緩衝器本体の端部にバンプクッションと対向する逆有底筒部型のキャップ体を装着してなり、当該キャップ体が底部と、底部に連なる筒部と、底部と筒部とが交わるコーナー部の複数箇所を下方に凹ませて円周方向に隔設した窪みと、底部の中央に形成してピストンロッドを挿入する挿入孔と、筒部に形成されて各窪みの両側に配置した複数の排出口とで構成された油圧緩衝器におけるバンプストッパにおいて、上記窪みを区画する窪み壁の内周側の側面をストレート又はテーパー状に形成して上記排出口の口縁に直接連続させたことを特徴とするものである。   In order to achieve the above-mentioned object, the means of the present invention comprises a cap body of an inverted bottomed cylinder portion facing the bump cushion at the end of the shock absorber body, and the cap body is attached to the bottom and the bottom. Consecutive tube portions, recesses that are recessed in a plurality of corner portions where the bottom portion and the tube portion intersect, and spaced in the circumferential direction, an insertion hole that is formed in the center of the bottom portion and into which the piston rod is inserted, and a tube In a bump stopper in a hydraulic shock absorber formed by a plurality of discharge ports arranged on both sides of each recess, the inner peripheral side surface of the recess wall that defines the recess is formed in a straight or tapered shape. It is characterized by being directly connected to the edge of the discharge port.

本発明によれば、窪みを区画する窪み壁の内周側の側面をストレート又はテーパー状に形成して排出口の口縁に直接連続させたので、排出口と窪み壁との間にはデッドスペースである凹部を形成しない。   According to the present invention, since the inner peripheral side surface of the hollow wall that defines the hollow is formed in a straight or tapered shape and directly connected to the edge of the discharge port, there is no dead space between the discharge port and the hollow wall. Do not form a recess that is a space.

従って、サスペンションの作動状態において、バンプストッパ内に侵入した泥水やダスト等は全て排出口から外部に確実に排出されることになり、上記凹部に溜まった泥水やダスト等が緩衝器本体を腐蝕させる原因となったり、シール部材に付着してピストンロッドを傷付けたりする可能性を無くすることができる。   Therefore, in the operating state of the suspension, all of the muddy water and dust that have entered the bump stopper are surely discharged to the outside through the discharge port, and the muddy water and dust accumulated in the concave portion corrode the shock absorber body. It is possible to eliminate the possibility of causing or damaging the piston rod by adhering to the seal member.

発明の実施するための最良の形態BEST MODE FOR CARRYING OUT THE INVENTION

以下に、本発明を自動車のサスペンション装置に使用する油圧緩衝器のバンプストッパに具体化した実施の形態を図に基づいて説明する。   Hereinafter, an embodiment in which the present invention is embodied in a bump stopper of a hydraulic shock absorber used in an automobile suspension device will be described with reference to the drawings.

この油圧緩衝器２１は、複筒型であって、図１に示すように、外筒２２内に挿入された内筒２３と、内筒２３内に図示しないピストンを介して出没自在に挿入されたピストンロッド２５と、内筒２３端部を封止しピストンロッド２５を軸支するロッドガイド２６と、ロッドガイド２６の上面に配置されたシール部材２７とを備えた緩衝器本体２９と、緩衝器本体２９の上部端部に嵌合された有底円筒状をなすバンプストッパ３０とから構成されている。   The hydraulic shock absorber 21 is of a double cylinder type, and as shown in FIG. 1, is inserted into the outer cylinder 22 through a piston (not shown) and freely inserted into and retracted from the inner cylinder 23. A shock absorber body 29 including a piston rod 25, a rod guide 26 that seals the end of the inner cylinder 23 and pivotally supports the piston rod 25, and a seal member 27 disposed on the upper surface of the rod guide 26; It is comprised from the bump stopper 30 which makes the bottomed cylindrical shape fitted by the upper end part of the container main body 29. As shown in FIG.

以下、詳細に説明すると、外筒２２と上記内筒２３とは同芯に配置され、外筒２２の端部内周と内筒２３の端部とに亘ってロッドガイド２６が嵌合されており、 ロッドガイド２６は、その中央にピストンロッド２５を案内する案内孔２４が設けられ、案内孔２４内に嵌合された環状の軸受部材２４ａを介しピストンロッド２５が摺動自在に軸支されている。   Hereinafter, in detail, the outer cylinder 22 and the inner cylinder 23 are arranged concentrically, and the rod guide 26 is fitted over the inner periphery of the end of the outer cylinder 22 and the end of the inner cylinder 23. The rod guide 26 is provided with a guide hole 24 for guiding the piston rod 25 in the center thereof, and the piston rod 25 is slidably supported via an annular bearing member 24a fitted in the guide hole 24. Yes.

シール部材２７は、ピストンロッド２５との隙間及び外筒２２内周面との隙間をシールする内側及び外側リップ２７ａ，２７ｂを備えており、ロッドガイド２６にシール部材２７を載置した状態で、外筒２２の開口端部を内側に折り曲げて加締めることによってロッドガイド２６及びシール部材２７を外筒２２と内筒２３に対して固定するようになっている。   The seal member 27 includes inner and outer lips 27a and 27b that seal the gap with the piston rod 25 and the inner peripheral surface of the outer cylinder 22, and the seal member 27 is placed on the rod guide 26. The rod guide 26 and the seal member 27 are fixed to the outer cylinder 22 and the inner cylinder 23 by bending the open end of the outer cylinder 22 inward and crimping.

バンプストッパ３０は、プレス加工によって逆有底筒状に形成されたキャップ体３１と、このキャップ体３１の上面に溶接固定された円盤状のストッパプレート３２とから構成されており、このストッパプレート３２の中央にはピストンロッド２５を通す挿通孔３３がキャップ体３１の中央の孔と対向して設けられている。   The bump stopper 30 includes a cap body 31 formed into an inverted bottomed cylindrical shape by pressing and a disk-shaped stopper plate 32 welded and fixed to the upper surface of the cap body 31. An insertion hole 33 through which the piston rod 25 passes is provided in the center of the cap body 31 so as to face the center hole of the cap body 31.

即ち、本発明のバンプストッパ３０は、緩衝器本体２９の端部にバンプクッションと対向する逆有底筒部型のキャップ体３１を装着してなるものであり、キャップ体３１が底部３１aと、底部３１aに連なる筒部３９と、底部３１aと筒部３９とが交わるコーナー部の複数箇所を下方に凹ませて円周方向に隔設した窪み３４と、底部３１aの中央に形成してピストンロッドを挿入する挿入孔３３と、筒部３９に形成されて各窪み３４の両側に配置した複数の排出口３８とで構成されている。   That is, the bump stopper 30 of the present invention is formed by mounting an inverted bottomed cylindrical part cap body 31 facing the bump cushion at the end of the shock absorber main body 29, and the cap body 31 is formed with a bottom 31a, Piston rod formed at the center of the bottom portion 31a, a cylindrical portion 39 continuous with the bottom portion 31a, a recess 34 in which a plurality of corner portions where the bottom portion 31a and the cylindrical portion 39 intersect are recessed downward and spaced in the circumferential direction. And a plurality of discharge ports 38 formed in the cylindrical portion 39 and disposed on both sides of each recess 34.

そして、窪み３４を区画する窪み壁３５の内周側の側面３７をストレート又テーパー状に形成して排出口３８の口縁に直接連続させている。   Then, a side surface 37 on the inner peripheral side of the recess wall 35 that defines the recess 34 is formed in a straight or tapered shape and is directly connected to the edge of the discharge port 38.

例えば、窪み壁３５は、その内周側の側面３７がテーパー状となるように、図２に示すように、キャップ体３１の中心に向う程幅が狭くなる平面略台形状に形成されている。   For example, the hollow wall 35 is formed in a substantially trapezoidal plane shape whose width becomes narrower toward the center of the cap body 31 as shown in FIG. 2 so that the inner circumferential side surface 37 is tapered. .

この為、隣り合った窪み壁３５の側面３７間で形成され、後述する排出口３８へと繋がる通路Ｓは、排出口３８側程幅広となるように形成されている。   For this reason, the passage S formed between the side surfaces 37 of the adjacent hollow walls 35 and connected to the discharge port 38 described later is formed so as to be wider toward the discharge port 38 side.

従って、サスペンションの作動状態において、上記挿通孔３３を介してバンプストッパ３０内に侵入した泥水やダスト等はこの排出口３８側程幅広となる通路Ｓを介して排出口３８から外部へスムーズに排出されるようになっている。   Accordingly, when the suspension is in operation, muddy water, dust, and the like that have entered the bump stopper 30 through the insertion hole 33 are smoothly discharged from the discharge port 38 to the outside through the passage S that becomes wider toward the discharge port 38 side. It has come to be.

キャップ体３１の筒部３９には内外へと通じる複数の排出口３８が上記窪み壁３５と円周方向に並べて形成されている。   The cylindrical portion 39 of the cap body 31 is formed with a plurality of discharge ports 38 that communicate with the inside and outside of the cap body 31 side by side with the hollow wall 35 in the circumferential direction.

この排出口３８は隣り合う窪み壁３５間に配置された長方形状をなし、筒部３９の内周面と窪み壁３５の側面３７とが交わって出来る交線Ｐがその排出口３８の短辺３８ａを構成しており、この短辺３８ａと、上記交線Ｐと間には従来のような凹部からなるデッドスペースが形成されないようになっている。   The discharge port 38 has a rectangular shape arranged between adjacent hollow walls 35, and an intersection line P formed by the inner peripheral surface of the cylindrical portion 39 and the side surface 37 of the hollow wall 35 intersects with the short side of the discharge port 38. 38a is formed, and a conventional dead space formed of a concave portion is not formed between the short side 38a and the intersection line P.

従って、上記と同様に、挿通孔３３を介してバンプストッパ３０内に泥水やダスト等が侵入しても、上記交線Ｐと排出口３８の短辺３８ａとの間には従来のような凹部が形成されないので、この部分に溜まることなく確実に外部に排出するようになっている。   Therefore, similarly to the above, even if muddy water, dust or the like enters the bump stopper 30 through the insertion hole 33, a conventional recess is formed between the intersection line P and the short side 38a of the discharge port 38. Is not formed, so that it is surely discharged outside without accumulating in this portion.

そして、このバンプストッパ３０はストッパプレート３２の中央に設けた挿通孔３３をピストンロッド２５に通して緩衝器本体２９の上部に嵌合させると共に、窪み壁３５の下端面である係止段部３６を緩衝器本体２９の上面に押し当てることにより、この緩衝器本体２９の側面で排出口３８を塞ぐことなく開口状態を保ったまま緩衝器本体２９の上面との間に空間部及び通路Ｓを残して上記バンプストッパ３０が嵌合される。   The bump stopper 30 has an insertion hole 33 provided in the center of the stopper plate 32 inserted through the piston rod 25 to be fitted into the upper portion of the shock absorber body 29 and a locking step portion 36 which is a lower end surface of the hollow wall 35. Is pressed against the upper surface of the shock absorber main body 29, and the space and the passage S are formed between the shock absorber main body 29 and the upper surface of the shock absorber main body 29 while maintaining the open state without blocking the discharge port 38. The bump stopper 30 is fitted to remain.

このように構成されたバンプストッパ３０を備えた油圧緩衝器２１は、サスペンションの使用状態において、走行中に跳ね上げた泥水やダスト等が挿通孔３３を介して緩衝器本体２９のシール部材２７の上面に侵入したとしても、これら泥水やダスト等は、図１の矢印Ｙで示すように、バンプストッパ３０と緩衝器本体２９との間の空間部及び通路Ｓを通って上記排出口３８から外部へ排出される。   The hydraulic shock absorber 21 including the bump stopper 30 configured as described above is configured so that muddy water, dust, and the like splashed during traveling of the suspension member 27 of the shock absorber main body 29 through the insertion hole 33 when the suspension is in use. Even if it enters the upper surface, the muddy water, dust, and the like pass through the space between the bump stopper 30 and the shock absorber body 29 and the passage S as shown by the arrow Y in FIG. Is discharged.

このとき、排出口３８は、隣り合う窪み壁３５間に配置された長方形状をなすと共に、筒部３９の内周面と窪み壁３５の側面３７とが交わって出来る交線Ｐがその排出口３８の短辺３８ａを構成しているので、この短辺３８ａと上記交線Ｐと間には従来のような壁部が形成されない。   At this time, the discharge port 38 has a rectangular shape disposed between adjacent hollow walls 35, and an intersection line P formed by the inner peripheral surface of the cylindrical portion 39 and the side surface 37 of the hollow wall 35 intersects the discharge port. Since the short side 38a of 38 is comprised, the wall part like the past is not formed between this short side 38a and the said intersection line P. FIG.

このため、従来のような壁部と窪み壁３５の側面３７とで形成される凹部が存在しなくなり、サスペンションの作動状態において、バンプストッパ３０内に侵入した泥水やダスト等は全て排出口３８から外部に確実に排出される。   For this reason, there is no concave portion formed by the wall portion and the side surface 37 of the hollow wall 35 as in the prior art, and all the muddy water, dust and the like that have entered the bump stopper 30 in the operating state of the suspension are discharged from the discharge port 38. It is reliably discharged outside.

従って、バンプストッパ３０内に溜まった泥水やダスト等が緩衝器本体２９を腐蝕させる原因となったり、シール部材２７に付着してピストンロッド２５を傷付けたりする可能性を無くすることができる。  Accordingly, it is possible to eliminate the possibility that muddy water, dust, etc. accumulated in the bump stopper 30 cause the shock absorber main body 29 to be corroded or adhere to the seal member 27 and damage the piston rod 25.

又、排出口３８へと繋がる通路Ｓは、排出口３８側程幅広となるように形成されているので、バンプストッパ３０内への侵入物をスムーズに外部へ排出することができる。   Further, since the passage S connected to the discharge port 38 is formed so as to be wider toward the discharge port 38 side, the intruder into the bump stopper 30 can be smoothly discharged to the outside.

尚、本発明は、上記の実施の形態に限定されるものではなく、例えば、次のように変更して具体化することも可能である。   In addition, this invention is not limited to said embodiment, For example, it can also be changed and actualized as follows.

１）本実施の形態では、窪み壁３５を従来構造よりも幅広に形成することで、筒部３９の内周面と窪み壁３５の側面３７とが交わって出来る交線Ｐをその排出口３８の短辺３８ａとしたが、逆に排出口３８を幅広の長方形状としても良い。   1) In this embodiment, by forming the hollow wall 35 wider than the conventional structure, an intersection line P formed by the inner peripheral surface of the cylindrical portion 39 and the side surface 37 of the hollow wall 35 intersects with the discharge port 38. However, the discharge port 38 may be formed in a wide rectangular shape.

２）本実施の形態では、窪み壁３５をキャップ体３１の中心に向う程幅が狭くなる平面台形状に形成したが、これに限定されるものではなく、中心側でも幅の変わらない形状の窪み壁３５としても良い。   2) In the present embodiment, the hollow wall 35 is formed in a flat trapezoidal shape whose width becomes narrower toward the center of the cap body 31, but is not limited to this, and has a shape whose width does not change even on the center side. The hollow wall 35 may be used.

３）本実施の形態では、複筒型の油圧緩衝器２１に具体化したが、単筒型の油圧緩衝器に具体化しても良い。   3) In the present embodiment, the invention is embodied in the double cylinder type hydraulic shock absorber 21, but may be embodied in a single cylinder type hydraulic shock absorber.

本発明の実施の形態を示す油圧緩衝器の要部破断正面図である。It is a principal part fracture | rupture front view of the hydraulic shock absorber which shows embodiment of this invention. 図１におけるバンプストッパのＡ−Ａ線断面図である。FIG. 2 is a cross-sectional view taken along line AA of the bump stopper in FIG. 1. キャップ体の一部切欠き斜視図である。It is a partially cutaway perspective view of a cap body. 従来例を示す油圧緩衝器の要部破断正面図である。It is a principal part fracture | rupture front view of the hydraulic shock absorber which shows a prior art example. 図３におけるバンプストッパを示す要部破断正面図である。It is a principal part fracture | rupture front view which shows the bump stopper in FIG. 図３におけるバンプストッパのＢ-Ｂ線断面図である。FIG. 4 is a cross-sectional view of the bump stopper in FIG. 3 taken along line BB.

符号の説明Explanation of symbols

２１ 油圧緩衝器
２５ ピストンロッド
２９ 緩衝器本体
３０ バンプストッパ
３１ キャップ体
３１a底部
３３ 挿通孔
３４ 窪み
３５ 窪み壁
３６ 係止段部
３７ 側面
３８ 排出口
３９ 筒部）
21 Hydraulic shock absorber 25 Piston rod 29 Shock absorber body 30 Bump stopper 31 Cap body 31a Bottom
33 Insertion hole 34 Depression 35 Depression wall 36 Locking step portion 37 Side surface 38 Discharge port 39 Tube portion)

Claims (3)

緩衝器本体の端部にバンプクッションと対向する逆有底筒部型のキャップ体を装着してなり、当該キャップ体が底部と、底部に連なる筒部と、底部と筒部とが交わるコーナー部の複数箇所を下方に凹ませて円周方向に隔設した窪みと、底部の中央に形成してピストンロッドを挿入する挿入孔と、筒部に形成されて各窪みの両側に配置した複数の排出口とで構成された油圧緩衝器におけるバンプストッパにおいて、上記窪みを区画する窪み壁の内周側の側面をストレート又はテーパー状に形成して上記排出口の口縁に直接連続させたことを特徴とする油圧緩衝器のバンプストッパ The end of the shock absorber body is equipped with a reverse-bottomed cylinder-type cap body that faces the bump cushion, and the cap body has a bottom part, a cylindrical part connected to the bottom part, and a corner part where the bottom part and the cylindrical part intersect A plurality of recesses recessed in the circumferential direction, an insertion hole formed in the center of the bottom portion for inserting the piston rod, and a plurality of recesses formed in the cylindrical portion and disposed on both sides of each recess. In the bump stopper in the hydraulic shock absorber configured with the discharge port, the side surface on the inner peripheral side of the hollow wall that divides the hollow is formed in a straight or tapered shape and directly connected to the edge of the discharge port. Bump stopper for hydraulic shock absorber 排出口は筒部の内周面と窪み壁の側面とが交わって出来る交線を短辺とする長方形状に形成されている請求項１記載の油圧緩衝器のバンプストッパ。 2. The bump stopper for a hydraulic shock absorber according to claim 1, wherein the discharge port is formed in a rectangular shape having a short side of an intersecting line formed by an inner peripheral surface of the cylindrical portion and a side surface of the hollow wall. 窪みはキャップ体の中心に向う程幅が狭くなる平面略台形状に形成されている請求項１又は２に記載の油圧緩衝器のバンプストッパ。
The bump stopper of the hydraulic shock absorber according to claim 1 or 2, wherein the recess is formed in a substantially trapezoidal shape whose width becomes narrower toward the center of the cap body.
JP2004080115A 2004-03-19 2004-03-19 Bump stopper of hydraulic shock absorber Expired - Fee Related JP4198621B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005060331A1 (en) * 2005-12-16 2007-06-28 Zf Friedrichshafen Ag Damper for vibrations has stepped disk provided with second disk to enlarge its stop surface, which may be fixed to it
KR100996866B1 (en) 2005-11-03 2010-11-29 주식회사 만도 Shock absorber
JP2014199060A (en) * 2013-03-29 2014-10-23 株式会社ショーワ Suspension device and cover member
DE102015217727A1 (en) 2014-09-22 2016-03-24 Toyota Jidosha Kabushiki Kaisha STOP CAP
JP2016114069A (en) * 2014-12-11 2016-06-23 日立オートモティブシステムズ株式会社 Bumper cap and cylinder device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100996866B1 (en) 2005-11-03 2010-11-29 주식회사 만도 Shock absorber
DE102005060331A1 (en) * 2005-12-16 2007-06-28 Zf Friedrichshafen Ag Damper for vibrations has stepped disk provided with second disk to enlarge its stop surface, which may be fixed to it
DE102005060331B4 (en) * 2005-12-16 2011-02-17 Zf Friedrichshafen Ag vibration
JP2014199060A (en) * 2013-03-29 2014-10-23 株式会社ショーワ Suspension device and cover member
DE102015217727A1 (en) 2014-09-22 2016-03-24 Toyota Jidosha Kabushiki Kaisha STOP CAP
JP2016061425A (en) * 2014-09-22 2016-04-25 トヨタ自動車株式会社 Bump stopper cap
US9829062B2 (en) 2014-09-22 2017-11-28 Toyota Jidosha Kabushiki Kaisha Bump stopper cap
JP2016114069A (en) * 2014-12-11 2016-06-23 日立オートモティブシステムズ株式会社 Bumper cap and cylinder device

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