JPH018762Y2 - - Google Patents
Info
- Publication number
- JPH018762Y2 JPH018762Y2 JP1983106991U JP10699183U JPH018762Y2 JP H018762 Y2 JPH018762 Y2 JP H018762Y2 JP 1983106991 U JP1983106991 U JP 1983106991U JP 10699183 U JP10699183 U JP 10699183U JP H018762 Y2 JPH018762 Y2 JP H018762Y2
- Authority
- JP
- Japan
- Prior art keywords
- fold
- outer member
- boot
- sides
- shaft
- 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.)
- Expired
Links
- 238000005452 bending Methods 0.000 claims description 11
- 229920003051 synthetic elastomer Polymers 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000005061 synthetic rubber Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Diaphragms And Bellows (AREA)
Description
【考案の詳細な説明】
この考案は合成ゴムや軟質合成樹脂等からなる
自在継手用ブーツに関するものである。[Detailed description of the invention] This invention relates to a boot for a universal joint made of synthetic rubber, soft synthetic resin, or the like.
第１図は自動車の前輪駆動軸等に使用されてい
る等速自在継手であつて、開口部を有する外方部
材１と、動力の伝達を行うシヤフト２に結合され
た内方部材３と、外方部材１と内方部材３との間
において動力の伝達を行うボール４と、該ボール
４を収容保持するケージ５と、外方部材１の開口
部を覆う為該外方部材１とシヤフト２とにわたつ
て取付けられ、シヤフト２にブーツバンド６にて
固着される小径の装着部７より外方部材１にブー
ツバンド８にて固着される大径の装着部９に向つ
て屈伸部１０の各襞１１，１１……の山部の直径
が順次大きくなるように形成された蛇腹状のブー
ツ１２により構成されている。 FIG. 1 shows a constant velocity universal joint used in front wheel drive shafts of automobiles, which includes an outer member 1 having an opening, an inner member 3 connected to a shaft 2 that transmits power, A ball 4 for transmitting power between the outer member 1 and the inner member 3, a cage 5 for housing and holding the ball 4, and a shaft for covering the opening of the outer member 1. 2 and a bending portion 10 extending from a small diameter mounting portion 7 fixed to the shaft 2 with a boot band 6 toward a large diameter mounting portion 9 fixed to the outer member 1 with a boot band 8. It is constituted by a bellows-shaped boot 12 formed such that the diameter of the crest of each fold 11, 11, . . . becomes larger in sequence.
ところが、上記構造のブーツ１２は、外部から
の力の作用により例えば道路から飛散した小石等
が衝突して屈曲部１０の襞１１が凹んだ場合、凹
んだ襞１０の復元が困難であり、このまま襞１１
が凹んだ状態が続くと、異常な応力がかかり、ブ
ーツ１２が早期に破損する不都合があつた。 However, in the boots 12 having the above structure, when the folds 11 of the bent portion 10 are dented due to the action of an external force, such as a collision with a pebble scattered from the road, it is difficult to restore the dented pleats 10, Fold 11
If the concave condition continued, abnormal stress would be applied to the boot 12, causing the boot 12 to break at an early stage.
特に悪路を走行する自動車に於いては、道路か
ら飛散した小石等の衝突が激しいので、通常用い
られている例えばネオプレンゴム等の合成ゴム
（硬さHs50〜60）に替えて、これより硬い例えば
ポリウレタン等の軟質合成樹脂（硬さHs80〜90）
を用いることが考えられるが、この場合にはブー
ツが硬くて、通常用いられる合成ゴムのブーツよ
り凹んだ襞の復元が更に困難であり、ブーツが早
期に破損すると云う上記不都合が顕著である。 Particularly in cars driving on rough roads, collisions with pebbles etc. flying from the road are severe, so instead of the commonly used synthetic rubber such as neoprene rubber (hardness Hs 50-60), which is harder than this. For example, soft synthetic resin such as polyurethane (hardness Hs80-90)
However, in this case, the boots are hard and it is more difficult to restore the recessed folds than in the commonly used synthetic rubber boots, and the above-mentioned disadvantage of early breakage of the boots is significant.
この考案は上記欠点に鑑みてなされたもので、
屈伸部の各襞の山部の両側に傾斜対向する襞辺
を、小径部側に位置する襞辺の肉厚を厚く大径部
側に位置する襞辺の肉厚を薄く形成することによ
り、凹んだ襞の復元性を向上させんとするもので
ある。 This idea was made in view of the above drawbacks,
By forming the fold sides that slope opposite to each other on both sides of the crest of each fold of the bending part, the fold sides located on the small diameter part side are thicker and the fold sides located on the large diameter part side are thinner. The aim is to improve the recovery of depressed folds.
以下この考案の詳細を第２図に示す自動車の前
輪駆動軸等に使用される等速自在継手を例に説明
すると次の通りである。 The details of this invention will be explained below using, as an example, a constant velocity universal joint used for a front wheel drive shaft of an automobile shown in FIG. 2.
第２図に於いて、１３は開口部を有する外方部
材、１４は動力伝達を行うシヤフト１５に結合さ
れた内方部材、１６は外方部材１３と内方部材１
４の間において動力の伝達を行うボール、１７は
ボール１６を収容保持するケージ、１８は外方部
材１３の開口部を覆う為に該外方部材１３とシヤ
フト１５とにわたつて取付けられたこの考案の対
称とするブーツである。 In FIG. 2, 13 is an outer member having an opening, 14 is an inner member connected to a shaft 15 that transmits power, and 16 is an outer member 13 and an inner member 1.
4, a cage 17 houses and holds the ball 16, and 18 is a cage attached between the outer member 13 and the shaft 15 to cover the opening of the outer member 13. These are the boots that are the subject of this invention.
上記ブーツ１８は材質としてHs80〜90の硬度
をもつた例えばポリウレタン等の軟質合成樹脂を
使用し、小径の装着部１９より大径の装着部２０
に向つて屈伸部２１の各襞２２，２２……の山部
直径を順次大きくして蛇腹状に形成され、小径の
装着部１９をブーツバンド２３にてシヤフト１５
に固着し、大径の装着部２０をブーツバンド２４
にて外方部材１３に固着してある。このブーツ１
８の特徴は屈伸部２１の襞２２の凹みに対する復
元性を向上の為、各襞２２，２２……の山部の両
側に傾斜対向する襞辺２２ａ，２２ｂ……の肉厚
t1，t2を異ならせたことにある。即ち、小径の装
着部１９側に位置する襞辺２２ａの肉厚t1を厚
く、大径の装着部２０側に位置する襞辺２２ｂの
肉厚t2を薄く形成してt1＞t2の関係となるように
する。つまり、直径方向面に対する角度θが小さ
い為に復元力が大きい襞辺２２ａの肉厚t1を厚く
し、直径方向面に対する角度αが大きい為に復元
力が小さい襞辺２２ｂの肉厚t2を薄くした。 The boot 18 is made of a soft synthetic resin such as polyurethane having a hardness of Hs80 to 90, and has a larger diameter mounting portion 20 than a small diameter mounting portion 19.
The diameter of each fold 22, 22, . . . of the folds 22, 22, .
The large diameter mounting portion 20 is fixed to the boot band 24.
It is fixed to the outer member 13 at. This boots 1
8 is characterized by the thickness of the fold sides 22a, 22b... which are inclined and opposite to each other on both sides of the peaks of the folds 22, 22..., in order to improve the resilience against the dents in the folds 22 of the bending/stretching portion 21.
The reason is that t 1 and t 2 are different. That is, the wall thickness t 1 of the folded side 22a located on the side of the small-diameter mounting portion 19 is formed to be thick, and the wall thickness t 2 of the folded side 22b located on the side of the large-diameter mounting portion 20 is formed thin, so that t 1 >t 2 . The relationship should be as follows. In other words, the wall thickness t 1 of the fold side 22a, which has a large restoring force because the angle θ to the diametrical plane is small, is increased, and the wall thickness t 2 of the fold side 22b, which has a small restoring force because the angle α to the diametrical plane is large, is increased . I made it thinner.
上記構造によれば、例えば道路上の異常な突起
物がブーツ１８の屈伸部２１に衝突して該屈伸部
２１の襞２２が凹んでも、襞２２の小径の装着部
１９側に位置する襞辺２２ａの肉厚t1を厚く大径
の装着部２０側に位置する襞辺２２ｂの肉厚t2を
薄くしたから、凹んだ襞２２は即座に元の形状に
復元することができる。即ち、直径方向面に対す
る角度θが小さく復元力が大きい襞辺２２ａと直
径方向面に対する角度αが大きく復元力が小さい
襞辺２２ｂの間にt1＞t2の関係となるように肉厚
差を設けたから、復元力の差がより大きくなつて
小径の装着部１９側に位置する襞辺２２ａが復元
し易くなり、この襞辺２２ａの復元に伴つて大径
の装着部２０側に位置する襞辺２２ｂも同時に復
元する。 According to the above structure, even if, for example, an abnormal protrusion on the road collides with the bending part 21 of the boot 18 and the fold 22 of the bending part 21 is dented, the fold side of the fold 22 located on the small diameter mounting part 19 side Since the wall thickness t 1 of the fold side 22a is made thicker and the wall thickness t 2 of the fold side 22b located on the side of the large-diameter mounting portion 20 is made thinner, the recessed fold 22 can be immediately restored to its original shape. That is, the wall thickness difference is set so that the relationship t 1 > t 2 is established between the fold side 22a, which has a small angle θ with respect to the diametrical plane and a large restoring force, and the fold side 22b, which has a large angle α with respect to the diametrical plane and has a small restoring force. Since the difference in restoring force becomes larger, the folded side 22a located on the side of the small-diameter mounting portion 19 is easily restored, and as the folded side 22a is restored, the folded side 22a is located on the side of the large-diameter mounting portion 20. The fold side 22b is also restored at the same time.
以上説明したように、この考案は自在継手の外
方部材の開口部を覆う為該外方部材とシヤフトと
にわたつて取付けられ、シヤフトに固着される小
径部より外方部材に固着される大径部に向つて屈
伸部の各襞の山部直径が順次大きくなるように形
成された蛇腹状のブーツにおいて、前記屈伸部の
各襞の山部の両側に傾斜対向する襞辺を、小径部
側に位置する襞辺の肉厚を厚く大径部側に位置す
る襞辺の肉厚を薄く形成したから、屈伸部の襞の
凹みに対する復元性を著しく向上させ、これによ
りブーツの破損を防止して寿命を大巾に延長改善
することができる等の実用上の効果が大きく、特
に、例えばポリウレタンの軟質合成樹脂からなる
ものに施すとその効果は顕著であり、この種の自
在継手用ブーツとして優れた性能を発揮し得るも
のである。 As explained above, this invention is installed across the outer member and the shaft in order to cover the opening of the outer member of the universal joint, and the large diameter portion fixed to the outer member is attached to the outer member than the small diameter portion fixed to the shaft. In a bellows-shaped boot formed such that the diameter of the crest of each fold of the bending portion increases sequentially toward the diameter portion, the fold sides that are inclined and opposite to each other on both sides of the crest of each fold of the bending portion are formed as a small diameter portion. Since the thickness of the folds located on the sides is thicker and the thickness of the folds located on the large diameter side is thinner, the resilience against dents in the folds at the bending and stretching parts is significantly improved, thereby preventing damage to the boots. This type of universal joint boot has great practical effects, such as significantly extending and improving the service life of the boot. It is capable of exhibiting excellent performance.
第１図は従来のブーツを用いた自動車の前輪駆
動軸等に使用されている等速自在継手の断面図、
第２図はこの考案に係るブーツを用いた自動車の
前輪駆動軸等に使用されている等速自在継手の断
面図である。
１８……ブーツ、１９，２０……装着部、２１
……屈伸部、２２……襞、２２ａ，２２ｂ……襞
辺、t1，t2……襞辺の肉厚。
Figure 1 is a cross-sectional view of a constant velocity universal joint that uses a conventional boot and is used in the front wheel drive shaft of an automobile.
FIG. 2 is a cross-sectional view of a constant velocity universal joint used in the front wheel drive shaft of an automobile, etc., using the boot according to this invention. 18... Boots, 19, 20... Mounting part, 21
... bending part, 22 ... folds, 22a, 22b ... fold sides, t 1 , t 2 ... wall thickness of fold sides.
Claims (1)
材とシヤフトとにわたつて取付けられ、シヤフト
に固着される小径部より外方部材に固着される大
径部に向つて屈伸部の各襞の山部直径が順次大き
くなるように形成された蛇腹状のブーツにおい
て、前記屈伸部の各襞の山部の両側に傾斜対向す
る襞辺を、小径部側に位置する襞辺の肉厚を厚く
大径部側に位置する襞辺の肉厚を薄く形成したこ
とを特徴とする自在継手用ブーツ。 In order to cover the opening of the outer member of the universal joint, it is attached across the outer member and the shaft, and each of the bending parts is attached from the small diameter part fixed to the shaft to the large diameter part fixed to the outer member. In a bellows-shaped boot formed in such a way that the diameter of the crest of the pleats increases sequentially, the sides of the folds that are inclined and opposite to each other on both sides of the crests of each fold of the bending section are defined by the wall thickness of the pleat side located on the small diameter side. A boot for a universal joint characterized by having a thick wall and a thin wall on the fold side located on the large diameter side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10699183U JPS6014353U (en) | 1983-07-08 | 1983-07-08 | Boots for universal joints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10699183U JPS6014353U (en) | 1983-07-08 | 1983-07-08 | Boots for universal joints |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6014353U JPS6014353U (en) | 1985-01-31 |
| JPH018762Y2 true JPH018762Y2 (en) | 1989-03-09 |
Family
ID=30250154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10699183U Granted JPS6014353U (en) | 1983-07-08 | 1983-07-08 | Boots for universal joints |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6014353U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4657941B2 (en) * | 2006-02-13 | 2011-03-23 | Ｎｔｎ株式会社 | Constant velocity universal boots |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824649U (en) * | 1981-08-10 | 1983-02-16 | バブコツク日立株式会社 | liquid heating device |
-
1983
- 1983-07-08 JP JP10699183U patent/JPS6014353U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824649U (en) * | 1981-08-10 | 1983-02-16 | バブコツク日立株式会社 | liquid heating device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6014353U (en) | 1985-01-31 |
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