JPH0849745A - Dust cover for shock absorber - Google Patents

Dust cover for shock absorber

Info

Publication number
JPH0849745A
JPH0849745A JP6185027A JP18502794A JPH0849745A JP H0849745 A JPH0849745 A JP H0849745A JP 6185027 A JP6185027 A JP 6185027A JP 18502794 A JP18502794 A JP 18502794A JP H0849745 A JPH0849745 A JP H0849745A
Authority
JP
Japan
Prior art keywords
dust cover
shock absorber
thickness
crest
bellows
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6185027A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Ejima
和善 江嶋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP6185027A priority Critical patent/JPH0849745A/en
Publication of JPH0849745A publication Critical patent/JPH0849745A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J3/00Diaphragms; Bellows; Bellows pistons
    • F16J3/04Bellows
    • F16J3/041Non-metallic bellows
    • F16J3/043Non-metallic bellows with particular means for limiting wear

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

PURPOSE:To provide a dust cover of high durability hard to generate a crack, caused by earlier degradation than other parts, to the crest part of the bellows cylinder part of the dust cover even under long-term use by making each crest part of the bellows cylinder part thicker than the parts adjacent to the crest part. CONSTITUTION:When a plate member 4 rises in contact with the end part 8B of a dust cover by the bound of a wheel, a bellows cylinder part 8A is compressed so as to start contraction in the axial direction of a piston. That is, plural crest parts 8C protruding outward in the radial direction of the bellows cylinder part 8A approach the adjacent crest parts, and plural trough parts 8D recessed outward in the radial direction approach in the same way. As the trough parts 8D approach each other, tensile stress is generated to the crest parts 8C, but since the thickness of the bellows cylinder part 8A is gradually thickened toward the crest part 8C from the trough part 8D, and the area of the crest part 8C is enlarged so as to have the maximum thickness d3 at the apex of the crest part 8C compared to the thickness d2 of the adjacent part and the thickness d1 of the trough part. Tensile stress is thereby dispersed all around the crest part 8C.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、ショックアブソーバ
のピストンロッドに取り付けられたバンパーバウンド及
び/又はピストンロッド部分への水や石などの異物の侵
入を防ぐためにピストンロッドの周囲を取り囲むように
設けられるショックアブソーバのダストカバーに関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided so as to surround a piston rod of a shock absorber so as to prevent the entry of foreign matter such as water or stones into the bumper bound and / or piston rod portion of the piston rod. Dust cover for shock absorbers.

【0002】[0002]

【従来の技術】従来の、例えば図7に示すような自動車
用ショックアブソーバ1では、シリンダ2から延びるピ
ストンロッド3に柔軟なバンパーバウンド7を取り付
け、ショックアブソーバ1に軸方向の低荷重がかかると
きには柔らかく、高荷重がかかるときは硬くなるように
してある。このようなバンパーバウンド7及び/又はシ
リンダ2、ピストンロッド3への水や石などの異物の侵
入を防ぐために、ピストンロッド3にはダストカバー1
08を取り付けていた。バンパーバウンド7もダストカ
バー108もピストンロッド3に圧入固定してある。シ
リンダ2には皿状部材4を取り付けてあり、ピストンロ
ッド3のダストカバー108上にはアッパーシート5を
取り付け、これらの間にスプリング6を取り付けてあ
る。また、ダストカバー108には水や石などの異物の
侵入を防ぐためのダストカバーとしての機能を有する筒
部108Aが設けられており、この筒部108Aは図8
に示すように、ピストン軸方向の上下に自在伸縮するよ
うにゴムなどの弾性体を用いて、均一な厚みdで,径方
向外方に向かって凸となる山部108Cと同じく凹とな
る谷部108Dを交互に形成した蛇腹状筒部とされてい
る。シリンダ2に取り付けられた皿状部材4が車輪(図
示せず)のバウンド及びリバウンドによって、ダストカ
バーの端部108Bに当接したり離れたりすることで蛇
腹状筒部108Aが伸縮を繰り返す。
2. Description of the Related Art In a conventional automobile shock absorber 1 as shown in FIG. 7, for example, a flexible bumper bound 7 is attached to a piston rod 3 extending from a cylinder 2 so that a low axial load is applied to the shock absorber 1. It is soft and hard when subjected to high loads. In order to prevent foreign matter such as water or stones from entering the bumper bound 7 and / or the cylinder 2 and the piston rod 3, the dust cover 1 is attached to the piston rod 3.
I had attached 08. Both the bumper bound 7 and the dust cover 108 are press-fitted and fixed to the piston rod 3. A dish-shaped member 4 is attached to the cylinder 2, an upper sheet 5 is attached on the dust cover 108 of the piston rod 3, and a spring 6 is attached between them. Further, the dust cover 108 is provided with a cylindrical portion 108A having a function as a dust cover for preventing foreign matter such as water and stones from entering, and the cylindrical portion 108A is shown in FIG.
As shown in FIG. 7, an elastic body such as rubber is used so that it can freely expand and contract in the vertical direction of the piston, and with a uniform thickness d, a ridge portion 108C that is convex outward in the radial direction and a valley that is also concave. It is a bellows-shaped tubular portion in which the portions 108D are alternately formed. The bellows-shaped tubular portion 108A repeats expansion and contraction by the dish-shaped member 4 attached to the cylinder 2 coming into contact with or leaving the end portion 108B of the dust cover by bouncing and rebounding of a wheel (not shown).

【0003】[0003]

【発明が解決しようとする課題】しかしながら、このよ
うな従来のダストカバー構造にあっては、ダストカバー
の外周面、特に蛇腹状筒部108Aの山部108Cの外
表面においては、エンジンからの放熱や大気中に存在す
る酸素及びオゾンと、車輪のバウンド時に蛇腹が縮小す
る際の前記山部108Cの頂点108Fの外表面に集中
して加えられる引っ張り応力とが相まって、この山部を
中心にゴムなどの弾性体の劣化が起こりやすく、長期間
にわたって使用した後は山部外表面に亀裂が発生する。
更に使用を長く続けると、亀裂は進行して山部内表面ま
で貫通して、最後には蛇腹状筒部108Aが大きく破れ
てしまいダストカバーの機能を果たさなくなる。
However, in such a conventional dust cover structure, heat radiation from the engine occurs on the outer peripheral surface of the dust cover, especially on the outer surface of the crest portion 108C of the bellows-shaped tubular portion 108A. And oxygen existing in the atmosphere and ozone, and the tensile stress concentrated on the outer surface of the apex 108F of the mountain portion 108C when the bellows are contracted when the wheel bounces are combined, and the rubber is centered around this mountain portion. Degradation of the elastic body easily occurs, and cracks occur on the outer surface of the mountain portion after long-term use.
When the use is further continued for a long time, the crack progresses and penetrates to the inner surface of the mountain portion, and finally the bellows-shaped cylindrical portion 108A is largely broken, and the function of the dust cover is not fulfilled.

【0004】そこで、この発明は、長期間にわたって使
用しても、ダストカバーの蛇腹状筒部の山部にほかの部
位よりも早期に劣化による亀裂が発生しにくく、耐久性
の高いダストカバーを提供することを目的とする。
Therefore, according to the present invention, even if the dust cover is used for a long period of time, cracks due to deterioration are less likely to occur in the peak portion of the bellows-shaped cylindrical portion of the dust cover earlier than other portions, and the dust cover has high durability. The purpose is to provide.

【0005】[0005]

【課題を解決するするための手段】この出願に係る発明
は、径方向外方に向かって凸となる複数の山部と径方向
外方に向かって凹となる複数の谷部を有する弾性体から
なる蛇腹状筒部を備え、ショックアブソーバのピストン
ロッドの周囲を取り囲むように設けられるショックアブ
ソーバのダストカバーにおいて、前記蛇腹状筒部の山部
の厚みを、該山部に隣接する部分の厚みよりも大きくし
たことを特徴とするものである。
DISCLOSURE OF THE INVENTION The invention according to this application is an elastic body having a plurality of peaks which are convex outward in the radial direction and a plurality of valleys which are concave outward in the radial direction. In the dust cover of the shock absorber provided so as to surround the periphery of the piston rod of the shock absorber, the thickness of the peak portion of the bellows-shaped tubular portion is the thickness of the portion adjacent to the peak portion. It is characterized by being made larger than.

【0006】[0006]

【作用】この発明において、ショックアブソーバに用い
られる蛇腹状のダストカバーの山部の厚みを、それに隣
接する部分の厚みより大きくしたので、蛇腹の縮小する
時に山部の頂点に引っ張り応力が集中的に発生すること
がなく、山部周辺全体に引っ張り応力を広く分散させる
ことが可能となる。
According to the present invention, the bellows-shaped dust cover used in the shock absorber has a ridge portion thicker than a portion adjacent thereto, so that when the bellows is contracted, tensile stress is concentrated on the apex of the ridge portion. It is possible to disperse the tensile stress widely over the entire periphery of the mountain portion without occurring.

【0007】[0007]

【実施例】以下、本発明を図面に基づいて説明する。図
1は、本発明の第一実施例に係るショックアブソーバの
ダストカバー8を用いたショックアブソーバの断面図で
ある。自動車用ショックアブソーバ1では、シリンダ2
から延びるピストンロッド3に柔軟なバンパーバウンド
7を取り付け、ショックアブソーバ1に軸方向の低荷重
がかかるときには柔らかく、高荷重がかかるときは硬く
なるようにしてある。このようなバンパーバウンド7へ
の水や石などの異物の侵入を防ぐために、ピストンロッ
ド3にはダストカバー8を取り付けている。バンパーバ
ウンド7もダストカバー8もピストンロッド3に圧入固
定してある。シリンダ2には皿状部材4を取り付けてあ
り、ピストンロッド3のダストカバー8上にはアッパー
シート5を取り付け、これらの間にスプリング6を取り
付けてある。ダストカバー8は、大振幅時にショックア
ブソーバ1に高い荷重が入力し、バンパーバウンド7が
つぶれ、更に高い荷重が入力すると外側へ広がろうとす
るのを阻止する上端筒部8Eと、大振幅入力時にストロ
ークする蛇腹状筒部8Aとからなり、蛇腹状筒部8Aは
ピストン軸方向の上下に自在伸縮するようにゴムなどの
弾性体を用いて、図2に詳細を示す断面構造に形成され
ている。シリンダ2に取り付けられた皿状部材4が車輪
(図示せず)のバウンド及びリバウンドによって、ダス
トカバーの端部8Bに当接したり離れたりすることでダ
ストカバー部8Aが伸縮を繰り返す。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a shock absorber using a dust cover 8 of the shock absorber according to the first embodiment of the present invention. Cylinder 2 in shock absorber 1 for automobile
A flexible bumper bound 7 is attached to a piston rod 3 extending from the shock absorber 1 so that the shock absorber 1 is soft when a low axial load is applied and hard when a high load is applied. A dust cover 8 is attached to the piston rod 3 in order to prevent foreign matter such as water and stones from entering the bumper bound 7. Both the bumper bound 7 and the dust cover 8 are press-fitted and fixed to the piston rod 3. A disc-shaped member 4 is attached to the cylinder 2, an upper sheet 5 is attached on the dust cover 8 of the piston rod 3, and a spring 6 is attached between them. The dust cover 8 has an upper end tubular portion 8E that prevents a large load from being applied to the shock absorber 1 when the amplitude is large, the bumper bound 7 is crushed, and that when a higher load is input, the upper end tubular portion 8E prevents the dust cover 8 from spreading outward. The bellows-shaped tubular portion 8A is formed by a stroke, and the bellows-shaped tubular portion 8A is formed to have a sectional structure shown in detail in FIG. 2 by using an elastic body such as rubber so as to freely expand and contract in the vertical direction of the piston axis. . The dish-shaped member 4 attached to the cylinder 2 comes into contact with or separates from the end portion 8B of the dust cover by bouncing and rebounding of a wheel (not shown), so that the dust cover portion 8A repeatedly expands and contracts.

【0008】図2は、本発明の第一実施例に係るショッ
クアブソーバのダストカバーの蛇腹状筒部8Aを拡大し
て示す断面図である。皿状部材4が車輪(図示せず)の
バウンドによってダストカバーの端部8Bに当接して更
に上昇すると、腹状筒部8Aが圧縮されてピストン軸方
向に縮小され始める。すなわち、蛇腹状筒部8Aの径方
向外方に向かって凸となる複数の山部8Cは隣接する山
部に接近し、同じく径方向外方に向かって凹となる複数
の谷部8Dも同様である。谷部8Dどうしが接近すると
接近した距離に応じて山部8Cに引っ張り応力が発生す
るが、図2のように、谷部8Dから山部8Cに向かうに
従い蛇腹状筒部8Aの厚みを全周にわたって漸次厚くし
て、山部8Cの頂点で隣接部分の厚みd2 および谷部の
厚みd3 より大きな最大厚みd1 を有するようにして、
山部8Cの面積を大きくしたので、これによって引っ張
り応力は山部8Cの周辺全体に分散される。
FIG. 2 is an enlarged sectional view showing a bellows-shaped tubular portion 8A of the dust cover of the shock absorber according to the first embodiment of the present invention. When the dish-shaped member 4 comes into contact with the end portion 8B of the dust cover due to the bouncing of the wheels (not shown) and further rises, the belly-shaped cylindrical portion 8A is compressed and starts contracting in the piston axial direction. That is, the plurality of peaks 8C that are convex outward in the radial direction of the bellows-shaped tubular portion 8A are close to the adjacent peaks, and the valleys 8D that are also concave outward in the radial direction are the same. Is. When the valleys 8D approach each other, tensile stress is generated in the ridges 8C according to the approaching distance, but as shown in FIG. 2, the thickness of the bellows-shaped tubular portion 8A is the entire circumference as it goes from the valleys 8D to the ridges 8C. To have a maximum thickness d 1 larger than the thickness d 2 of the adjacent portion and the thickness d 3 of the valley portion at the apex of the crest portion 8C,
Since the area of the mountain portion 8C is increased, the tensile stress is thereby dispersed over the entire periphery of the mountain portion 8C.

【0009】蛇腹状筒部8Aの断面形状は以下の第二な
いし第四実施例のようにしてもよい。
The cross-sectional shape of the bellows-shaped cylindrical portion 8A may be as in the following second to fourth embodiments.

【0010】図3は、本発明の第二実施例に係るショッ
クアブソーバのダストカバーの蛇腹状筒部8Aを拡大し
て示す断面図である。この例では、山部8Cの頂点8F
付近を断面矩形状に拡径して厚みを厚くして山部8Cの
頂点で,隣接する部分の厚みd2 および谷部8Dの厚み
3 より大きな最大厚みd1 を有するようにして、山部
8Cの表面積を大きくしたので、これによって引っ張り
応力は山部8Cの周辺全体に分散される。
FIG. 3 is an enlarged sectional view showing the bellows-shaped cylindrical portion 8A of the dust cover of the shock absorber according to the second embodiment of the present invention. In this example, the apex 8F of the mountain portion 8C
Near the vertex of the rectangular cross section to be enlarged by increasing the thickness crests 8C, so as to have a large maximum thickness d 1 than the thickness d 3 of the thickness d 2 and valleys 8D of adjacent portions, mountain Since the surface area of the portion 8C is increased, the tensile stress is thereby dispersed over the entire periphery of the mountain portion 8C.

【0011】図4は、本発明の第三実施例に係るショッ
クアブソーバのダストカバーの蛇腹状筒部8Aを拡大し
て示す断面図である。この例では、山部8Cの頂点8F
付近を断面三角形状に拡径して厚みを厚くして山部8C
の頂点で、隣接する部分の厚みd2 および谷部8Dの厚
みd3 より大きな最大厚みd1 を有するようにして、山
部8Cの表面積を大きくしたので、これによって引っ張
り応力は山部8Cの周辺全体に分散される。
FIG. 4 is an enlarged sectional view showing the bellows-shaped cylindrical portion 8A of the dust cover of the shock absorber according to the third embodiment of the present invention. In this example, the apex 8F of the mountain portion 8C
Increasing the diameter by increasing the diameter in the vicinity of the triangular cross section
At the top of, so as to have a large maximum thickness d 1 than the thickness d 3 of the adjacent portion of the thickness d 2 and valleys 8D, since the large surface area of the crest 8C, whereby the tensile stress of the mountain portion 8C Distributed throughout the perimeter.

【0012】図5は、本発明の第四実施例に係るショッ
クアブソーバのダストカバーの蛇腹状筒部8Aを拡大し
て示す断面図である。この例では、山部8Cの頂点8F
付近を断面円形状に拡径して厚みを厚くして山部8Cの
頂点で、隣接する部分の厚みd2 および谷部8Dの厚み
3 より大きな最大厚みd1 を有するようにして、山部
8Cの表面積を大きくしたので、これによって引っ張り
応力は山部8Cの周辺全体に分散される。
FIG. 5 is an enlarged sectional view showing a bellows-shaped cylindrical portion 8A of the dust cover of the shock absorber according to the fourth embodiment of the present invention. In this example, the apex 8F of the mountain portion 8C
Near at the apex of the circular cross-section to be enlarged by increasing the thickness crests 8C, so as to have a large maximum thickness d 1 than the thickness d 3 of the thickness d 2 and valleys 8D of adjacent portions, mountain Since the surface area of the portion 8C is increased, the tensile stress is thereby dispersed over the entire periphery of the mountain portion 8C.

【0013】図6は、本発明の第五実施例にかかるダス
トカバーを示すものであり、この例では、中央にピスト
ンロッド挿入用の貫通孔8Hを形成したバンパーバウン
ド部8Gが蛇腹状筒部8Aの上端に一体に形成されてお
り、蛇腹状筒部8Aは、前記の第一実施例と同様、図2
に示す断面構造とされている。したがって本例のダスト
カバーは、図1におけるバンパーバウンド7を省略して
そのままショックアブソーバ1に組み込むことができ
る。もちろん、この場合でも蛇腹状筒部8Aは、第二な
いし第四実施例に示した構造であってもよい。
FIG. 6 shows a dust cover according to a fifth embodiment of the present invention. In this example, a bumper bound portion 8G having a through hole 8H for inserting a piston rod in the center thereof is a bellows-shaped tubular portion. 8A is integrally formed on the upper end of 8A, and the bellows-shaped cylindrical portion 8A is similar to that in the first embodiment described above.
The cross-sectional structure is shown in. Therefore, the dust cover of this example can be directly incorporated in the shock absorber 1 without the bumper bound 7 in FIG. Of course, even in this case, the bellows-shaped tubular portion 8A may have the structure shown in the second to fourth embodiments.

【0014】なお、以上の各実施例において、山部8C
のみならず、谷部8Dの厚みも同様に大きくすることも
できるが、柔軟性の面からは前記各実施例のようにする
のが好ましい。又複数の山部のうち一部のみの厚みを大
きくしてもよい。
In each of the above embodiments, the mountain portion 8C
Not only the thickness of the valley portion 8D can be increased, but it is preferable that the thickness of the valley portion 8D is the same as that of each of the above embodiments in terms of flexibility. Further, the thickness of only a part of the plurality of peaks may be increased.

【0015】[0015]

【発明の効果】以上説明したように、この発明における
ダストカバーは、上記の構成としたことにより、蛇腹状
筒部の山部外表面に加わる引っ張り応力が山部周辺全体
に分散されるので、長期間にわたって使用しても、山部
にほかの部位よりも早期に劣化による亀裂が発生しにく
く、耐久性の高いダストカバーを提供することができ
る。
As described above, since the dust cover of the present invention has the above-described structure, the tensile stress applied to the outer surface of the crest of the bellows-shaped tubular portion is dispersed throughout the crest. Even if it is used for a long period of time, cracks due to deterioration are less likely to occur in the mountain portion earlier than other parts, and a highly durable dust cover can be provided.

【図面の簡単な説明】[Brief description of drawings]

【図1】図1は、本発明の第一実施例に係るショックア
ブソーバのダストカバーを用いたショックアブソーバの
断面図である。
FIG. 1 is a sectional view of a shock absorber using a dust cover of a shock absorber according to a first embodiment of the present invention.

【図2】本発明の第一実施例に係るショックアブソーバ
のダストカバーの蛇腹状筒部を拡大して示す断面図であ
る。
FIG. 2 is an enlarged sectional view showing a bellows-shaped tubular portion of the dust cover of the shock absorber according to the first embodiment of the present invention.

【図3】本発明の第二実施例に係るショックアブソーバ
のダストカバーの蛇腹状筒部を拡大して示す断面図であ
る。
FIG. 3 is an enlarged sectional view showing a bellows-shaped tubular portion of a dust cover of a shock absorber according to a second embodiment of the present invention.

【図4】本発明の第三実施例に係るショックアブソーバ
のダストカバーの蛇腹状筒部を拡大して示す断面図であ
る。
FIG. 4 is an enlarged sectional view showing a bellows-shaped tubular portion of a dust cover of a shock absorber according to a third embodiment of the present invention.

【図5】本発明の第四実施例に係るショックアブソーバ
のダストカバーの蛇腹状筒部を拡大して示す断面図であ
る。
FIG. 5 is an enlarged sectional view showing a bellows-shaped tubular portion of a dust cover of a shock absorber according to a fourth embodiment of the present invention.

【図6】本発明の第五実施例に係るダストカバーを示す
断面図である。
FIG. 6 is a sectional view showing a dust cover according to a fifth embodiment of the present invention.

【図7】従来のショックアブソーバのダストカバーを用
いたショックアブソーバの断面図である。
FIG. 7 is a cross-sectional view of a shock absorber using a conventional dust cover of a shock absorber.

【図8】従来のショックアブソーバのダストカバー蛇腹
状筒部を拡大して示す断面図である。
FIG. 8 is an enlarged cross-sectional view showing a bellows-shaped tubular portion of a dust cover of a conventional shock absorber.

【符号の説明】[Explanation of symbols]

1 ショックアブソーバ 2 シリンダ 3 ピストンロッド 4 皿上部材 5 アッパーシート 6 スプリング 7、8G バンパーバウンド 8、108 ダストカバー 8A、108A 蛇腹状筒部 8B、108B 端部 8C、108C 山部 8D、108D 谷部 8E、108E 上端筒部 8F、108F 山部頂点 8H 貫通孔 d 厚み d1 山部の厚み d2 隣接部分の厚み d3 谷部の厚み1 Shock Absorber 2 Cylinder 3 Piston Rod 4 Upper Dish Member 5 Upper Seat 6 Spring 7, 8G Bumper Bound 8, 108 Dust Cover 8A, 108A Bellows-shaped Cylinder 8B, 108B End 8C, 108C Crest 8D, 108D Valley 8E , 108E Upper end cylinder part 8F, 108F Peak part apex 8H Through hole d Thickness d 1 Thickness of crest part d 2 Thickness of adjacent part d 3 Thickness of trough part

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 径方向外方に向かって凸となる複数の山
部と径方向外方に向かって凹となる複数の谷部を有する
弾性体からなる蛇腹状筒部を備え、ショックアブソーバ
のピストンロッドの周囲を取り囲むように設けられるシ
ョックアブソーバのダストカバーにおいて、前記蛇腹状
筒部の山部の厚みを、該山部に隣接する部分の厚みより
も大きくしたことを特徴とするショックアブソーバのダ
ストカバー。
1. A shock absorber comprising: a bellows-shaped tubular portion made of an elastic body having a plurality of ridges radially outwardly convex and a plurality of valleys radially outwardly concave. In the dust cover of the shock absorber provided so as to surround the circumference of the piston rod, the thickness of the peak portion of the bellows-shaped tubular portion is made larger than the thickness of the portion adjacent to the peak portion. Dust cover.
【請求項2】 山部の厚みを谷部の厚みよりも大きくし
たことを特徴とする請求項1記載のショックアブソーバ
のダストカバー。
2. The dust cover for a shock absorber according to claim 1, wherein the thickness of the crests is greater than the thickness of the troughs.
【請求項3】 谷部から山部に向かうに従い前記蛇腹上
筒部の厚みを漸次厚くして、山部の頂点で最大厚みを有
するようにしたことを特徴とする請求項1又は2に記載
のショックアブソーバのダストカバー。
3. The method according to claim 1, wherein the bellows upper tubular portion is gradually thickened from the valley portion toward the mountain portion so as to have the maximum thickness at the apex of the mountain portion. Shock absorber dust cover.
【請求項4】 山部の頂点付近を断面矩形状に拡径し
て、山部の頂点で最大厚みを有するようにしたことを特
徴とする請求項1又は2に記載のショックアブソーバの
ダストカバー。
4. The dust cover for a shock absorber according to claim 1, wherein the vicinity of the apex of the mountain portion is enlarged in a rectangular shape in cross section so that the apex of the mountain portion has the maximum thickness. .
【請求項5】 山部の頂点付近を断面三角形状に拡径し
て、山部の頂点で最大厚みを有するようにしたことを特
徴とする請求項1又は2に記載のショックアブソーバの
ダストカバー。
5. The dust cover for a shock absorber according to claim 1 or 2, wherein the vicinity of the peak of the peak has a triangular cross-section so as to have a maximum thickness at the peak of the peak. .
【請求項6】 山部の頂点付近を断面円形状に拡径し
て、山部の頂点で最大厚みを有するようにしたことを特
徴とする請求項1又は2に記載のショックアブソーバの
ダストカバー。
6. The dust cover for a shock absorber according to claim 1 or 2, wherein the vicinity of the apex of the mountain portion is enlarged in a circular cross-section so that the apex of the mountain portion has a maximum thickness. .
【請求項7】 中央にピストンロッド挿入用の貫通孔を
形成したバンパーバウンド部を、前記蛇腹状筒部の一端
に一体的に設けたことを特徴とする請求項1ないし6の
いずれか1項に記載したショックアブソーバのダストカ
バー。
7. A bumper bounding portion having a through hole for inserting a piston rod in the center thereof is integrally provided at one end of the bellows-shaped tubular portion. The shock absorber dust cover described in.
JP6185027A 1994-08-05 1994-08-05 Dust cover for shock absorber Pending JPH0849745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6185027A JPH0849745A (en) 1994-08-05 1994-08-05 Dust cover for shock absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6185027A JPH0849745A (en) 1994-08-05 1994-08-05 Dust cover for shock absorber

Publications (1)

Publication Number Publication Date
JPH0849745A true JPH0849745A (en) 1996-02-20

Family

ID=16163508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6185027A Pending JPH0849745A (en) 1994-08-05 1994-08-05 Dust cover for shock absorber

Country Status (1)

Country Link
JP (1) JPH0849745A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451354C (en) * 2004-07-15 2009-01-14 卢才美 Hydraulic cylinder of oil pressure or water hydraulic pressure
WO2009147773A1 (en) * 2008-06-05 2009-12-10 三菱電機株式会社 Waterproof boot structure
CN102829126A (en) * 2011-06-14 2012-12-19 株式会社昭和 Cover member and suspension
JP2013540955A (en) * 2010-08-12 2013-11-07 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Thermoplastic rocking bumper
WO2021105583A1 (en) * 2019-11-29 2021-06-03 Bernard Renzo Protective boot for a transmission seal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451354C (en) * 2004-07-15 2009-01-14 卢才美 Hydraulic cylinder of oil pressure or water hydraulic pressure
WO2009147773A1 (en) * 2008-06-05 2009-12-10 三菱電機株式会社 Waterproof boot structure
JP2013540955A (en) * 2010-08-12 2013-11-07 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Thermoplastic rocking bumper
CN102829126A (en) * 2011-06-14 2012-12-19 株式会社昭和 Cover member and suspension
WO2021105583A1 (en) * 2019-11-29 2021-06-03 Bernard Renzo Protective boot for a transmission seal
FR3103870A1 (en) * 2019-11-29 2021-06-04 Bernard Renzo Protective bellows, in particular for the transmission seal

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