JPH0742838A - Boot fixing structure - Google Patents
Boot fixing structureInfo
- Publication number
- JPH0742838A JPH0742838A JP5212369A JP21236993A JPH0742838A JP H0742838 A JPH0742838 A JP H0742838A JP 5212369 A JP5212369 A JP 5212369A JP 21236993 A JP21236993 A JP 21236993A JP H0742838 A JPH0742838 A JP H0742838A
- Authority
- JP
- Japan
- Prior art keywords
- boot
- ring
- axial direction
- groove
- annular
- 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
Links
Landscapes
- Sealing Devices (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車の等速ジョイン
トその他各種機器用ブーツを被装着部材に固着するブー
ツの固着構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot fixing structure for fixing boots for constant velocity joints of automobiles and various other devices to a member to be mounted.
【０００２】[0002]
【従来の技術】自動車の等速ジョイント用ブーツとし
て、熱可塑性エラストマーで構成され、蛇腹部の両端
に、等速ジョイントの外輪および軸にそれぞれ密に封止
する固着部を設けたものを、等速ジョイントの外輪に装
着するブーツの固着構造は、例えば、実開昭６１−１８
１１２１号公報に記載されているものが知られている。2. Description of the Related Art As a boot for a constant velocity joint of an automobile, a boot made of a thermoplastic elastomer and provided with fixing portions for tightly sealing the outer ring and the shaft of the constant velocity joint on both ends of the bellows portion, etc. The fixing structure of the boot attached to the outer ring of the quick joint is, for example, as follows:
What is described in Japanese Patent No. 1121 is known.
【０００３】この種の自動車の等速ジョイント用ブーツ
の多くは、耐熱性、耐久性に優れるうえ成形性が容易で
あるところから熱可塑性エラストマーで構成されるが、
熱可塑性エラストマーは、ゴムに比して剛性が高いため
金属との密着性に劣る。このため、熱可塑性エラストマ
ーで構成されたブーツは、その固着部が金属からなるジ
ョイントの外輪または軸の表面との間で軸方向の滑りが
生じて脱落し易すく、かつシール強度が劣る欠点があ
る。また、熱可塑性エラストマーは、高温では軟化し、
低温では硬化するので、いずれの状態でも固着強度が低
下し、シール性が低下する。殊に、低温状態下でブーツ
に回転力が作用すると、その固着部が被装着部材の周方
向に滑り、ブーツに捻れ変形が生じて劣化破損を加速す
るだけでなく、被装着部材との間のシール性が大きく損
なわれる。Most of the boots for constant velocity joints of automobiles of this type are composed of a thermoplastic elastomer because they are excellent in heat resistance and durability and easy to mold.
Since the thermoplastic elastomer has higher rigidity than rubber, it has poor adhesion to metal. For this reason, the boot made of a thermoplastic elastomer has a drawback that the fixed part is easily slipped off due to slippage in the axial direction between the outer ring of the joint made of metal or the surface of the shaft, and the seal strength is poor. is there. Also, thermoplastic elastomers soften at high temperatures,
Since it cures at a low temperature, the fixing strength is lowered and the sealing property is lowered in any state. In particular, when a rotational force acts on the boot under a low temperature condition, the fixed portion slides in the circumferential direction of the mounted member, twisting deformation occurs in the boot and accelerates deterioration and damage. The sealing property of is greatly impaired.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記実開昭
６１−１８１１２１号公報に記載されているものにあっ
ては、被装着部の表面に多数の凹凸を形成してブーツの
固着部の内周面を多数の凹凸に噛合させて固着している
ので、それによりブーツが軸方向に回転するのを防止す
ることができるものである。しかしながら、このように
被装着部材に軸方向の凹凸を形成した構成のものでは、
その軸方向の凹凸が被装着部材と固着部との間の軸方向
への案内通路ともなるので、ブーツの固着部のシール性
が損なわれるという問題がある。SUMMARY OF THE INVENTION By the way, in the one disclosed in Japanese Utility Model Laid-Open No. 61-181121, a large number of irregularities are formed on the surface of the mounted portion so that the inside of the fixed portion of the boot is fixed. Since the peripheral surface is meshed with and fixed to a large number of irregularities, it is possible to prevent the boot from rotating in the axial direction. However, in the configuration in which the mounted member is formed with the unevenness in the axial direction as described above,
Since the unevenness in the axial direction also serves as a guide passage in the axial direction between the mounted member and the fixing portion, there is a problem that the sealing property of the fixing portion of the boot is impaired.
【０００５】本発明は、この問題点を解消しようとする
ものであって、被装着部材に軸方向に凹部を有するリン
グ凹溝を形成して、このリング凹溝にブーツの固着部の
環状突隆部を嵌入させて締め付け固着することにより、
ブーツの固着部と被装着部材との間に軸方向のシール性
の低下が生ぜず、しかも周方向の回転も確実に防止でき
るうえ、きわめて高いシール強度を有するブーツの固着
構造を提供することを目的とする。The present invention is intended to solve this problem. A ring groove having a recess in the axial direction is formed in a member to be mounted, and the ring projection of the fixing portion of the boot is formed in the ring groove. By inserting the ridge and tightening and fixing it,
(EN) It is possible to provide a boot fixing structure having an extremely high seal strength, in which the axial sealing property is not deteriorated between the fixing part of the boot and the mounted member, and moreover the circumferential rotation can be surely prevented. To aim.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するため次のように構成した。すなわち、本発明に係
るブーツの固着構造は、蛇腹部と蛇腹部の両端に被装着
部材に密に封止する固着部を有するブーツを被装着部材
に装着する固着構造において、少なくとも一方の固着部
の外周面に締具を装着する環状凹陥部を形成し、この環
状凹陥部内に、環状凹溝部を形成するとともに、上記環
状凹溝部に対応する環状凹陥部の内周面に環状突隆部を
形成し、被装着部材の外周面には、軸方向に凹部を有す
るリング凹溝を形成して、ブーツの固着部を環状突隆部
が被装着部材の環状リングに嵌入するように締め付けて
固着してなるものである。The present invention has the following constitution to achieve the above object. That is, the boot fixing structure according to the present invention is a fixing structure for mounting a boot to a mounted member, the boot having a bellows part and a fixing part tightly sealing the mounted member at both ends of the bellows part. An annular recess for mounting a fastener is formed on the outer peripheral surface of the annular recess, and an annular recess is formed in the annular recess, and an annular protrusion is formed on the inner peripheral surface of the annular recess corresponding to the annular recess. A ring groove having a recess in the axial direction is formed on the outer peripheral surface of the mounted member, and the boot fixing portion is tightened and fixed so that the annular protruding portion fits into the annular ring of the mounted member. It will be done.
【０００７】[0007]
【作用】本発明に係るブーツの固着構造においては、環
状凹陥部の内周面に環状突隆部が形成されており、被装
着部材の外周面に軸方向に凹部が形成されているので、
環状凹陥部を締具で締め付けると、環状突隆部が被装着
部材のリング凹溝内に軸方向の凹部にわたって嵌入した
状態で固着される。このため、固着部は被装着部材に強
固に固着され、軸方向の滑りはもとより周方向の回転も
確実に防止されるとともに高いシール強度が得られる。In the boot fixing structure according to the present invention, the annular protrusion is formed on the inner peripheral surface of the annular concave portion, and the concave portion is formed on the outer peripheral surface of the mounted member in the axial direction.
When the annular recess is tightened with the fastener, the annular protrusion is fixed in the ring recess groove of the mounted member while being fitted over the recess in the axial direction. For this reason, the fixing portion is firmly fixed to the mounted member, so that not only the sliding in the axial direction but also the rotation in the circumferential direction can be surely prevented and a high sealing strength can be obtained.
【０００８】[0008]
【実施例】図面には自動車の等速ジョイント用ブーツが
例示されている。図１において、１はブーツであり、こ
のブーツ１は、ポリエステル系、ポリウレタン系、ポリ
アミド系、ポリオレフィン系あるいは軟質ポリ塩化ビニ
ル系などの熱可塑性エラストマーの単体またはこれらの
ブレンド体を、ブロー成形、射出成形あるいは射出ブロ
ー成形により単層あるいは多層状に成形したものであ
る。ブーツ１は、蛇腹部２の一端に筒状の大径の固着部
３を、かつ他端に筒状の小径の固着部４を一体に形成し
てなるものである。ブーツ１を構成する熱可塑性エラス
トマーは、引張弾性率（ＪＩＳ Ｋ６３０１）が１００
〜２０００Ｋｇ／ｃｍ2の比較的強度が大である弾性材
料である。固着部３の外周面には平ベルト状の締具５を
装着するための環状凹陥部６が形成されており、固着部
４の外周面にも同様の環状凹陥部７が形成されている。
ブーツ１は、等速ジョイント８に装着され、ブーツ１の
固着部３は外輪９に、固着部４は軸１０にそれぞれ固着
される。外輪９には軸方向に多数の凹部１１を有するリ
ング凹溝１２が形成されており、軸１０にも同様に軸方
向に多数の凹部１３を有する環状凹溝１４が形成されて
いる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show boots for constant velocity joints of automobiles. In FIG. 1, reference numeral 1 is a boot, and the boot 1 is formed by blow molding or injection molding a single thermoplastic elastomer such as polyester, polyurethane, polyamide, polyolefin or soft polyvinyl chloride or a blend thereof. It is formed into a single layer or a multilayer by molding or injection blow molding. The boot 1 is formed by integrally forming a large cylindrical fixing portion 3 at one end of a bellows portion 2 and a small cylindrical fixing portion 4 at the other end. The thermoplastic elastomer forming the boot 1 has a tensile elastic modulus (JIS K6301) of 100.
It is an elastic material having a relatively high strength of up to 2000 Kg / cm 2 . An annular recess 6 for mounting the flat belt-shaped fastener 5 is formed on the outer peripheral surface of the fixing portion 3, and a similar annular recess 7 is formed on the outer peripheral surface of the fixing portion 4.
The boot 1 is attached to a constant velocity joint 8, the fixing portion 3 of the boot 1 is fixed to an outer ring 9, and the fixing portion 4 is fixed to a shaft 10. The outer ring 9 is formed with a ring groove 12 having a large number of recesses 11 in the axial direction, and the shaft 10 is also formed with an annular groove 14 having a large number of recesses 13 in the axial direction.
【０００９】図２に詳細を示すように、上記固着部３の
環状凹陥部６には、その軸方向略中央部に環状凹溝部１
５が形成されるとともに、環状凹溝部１５に対応する環
状凹陥部６の内周面には内方に突隆する環状突隆部１６
が形成されている。等速ジョイント８の外輪９に形成さ
れているリング凹溝１２の軸方向の凹部１１は、図２の
ように両側対向状に形成するほか、両側の凹部１１を軸
方向交互に形成してもよく、またリング凹溝１２の軸方
向のいずれか片側に形成してもよい。この凹部１１の数
は任意であるが、環状凹溝１２の全周にわたって回転角
９０度ごと４箇所、またはそれ以上形成することが固着
部３の回転防止上好ましい。図３は本発明に係るブーツ
１の全体を示している。なお、図示しないが、等速ジョ
イント８の軸１０も外輪９と同様に構成されている。As shown in detail in FIG. 2, the annular recessed portion 6 of the fixing portion 3 has an annular recessed groove portion 1 approximately at the center in the axial direction.
5 is formed, and an annular protrusion 16 that protrudes inward is formed on the inner peripheral surface of the annular recess 6 corresponding to the annular groove 15.
Are formed. The axial recesses 11 of the ring recessed groove 12 formed in the outer ring 9 of the constant velocity joint 8 are formed so as to face each other on both sides as shown in FIG. 2, or even if the recesses 11 on both sides are alternately formed in the axial direction. Alternatively, it may be formed on either side of the ring groove 12 in the axial direction. The number of the recessed portions 11 is arbitrary, but it is preferable to prevent rotation of the fixing portion 3 by forming four or more portions at every 90 ° rotation angle over the entire circumference of the annular recessed groove 12. FIG. 3 shows the entire boot 1 according to the present invention. Although not shown, the shaft 10 of the constant velocity joint 8 is also configured similarly to the outer ring 9.
【００１０】本発明に係るブーツ１は、前述のように、
等速ジョイント８に装着され。ブーツ１の固着部３は外
輪９に、固着部４は軸１０にそれぞれ固着される。そし
て、ブーツ１の固着部３は等速ジョイント８の外輪９に
差し込んで被せるが、固着部３の内周面に形成されてい
る環状突隆部１６はリング凹溝１２に嵌入した状態とす
る。次いで、締具５を締め付けると、内周面では環状突
隆部１６がリング凹溝１２内に嵌入した状態で環状突隆
部１６の裾部が軸方向の凹部１１に噛合した状態で係合
するように圧着される。このため、固着部３と外輪９と
の間に軸方向のシール性の低下が生ぜず、しかも周方向
の回転も防止されるうえ、固着部３と外輪９との間に高
いシール強度をもってシールされる。なお、小径の固着
部４も等速ジョイント８の軸１０に同様の態様で固着さ
れ、固着部４と軸１０との間でも同等の効果が得られ
る。The boot 1 according to the present invention, as described above,
Attached to the constant velocity joint 8. The fixing portion 3 and the fixing portion 4 of the boot 1 are fixed to the outer ring 9 and the shaft 10, respectively. Then, the fixed portion 3 of the boot 1 is inserted into the outer ring 9 of the constant velocity joint 8 to cover it, but the annular protruding portion 16 formed on the inner peripheral surface of the fixed portion 3 is fitted into the ring groove 12. . Next, when the fastener 5 is tightened, the inner peripheral surface is engaged with the annular protruding portion 16 fitted in the ring groove 12 with the skirt of the annular protruding portion 16 meshing with the axial recessed portion 11. It is crimped so that Therefore, the sealing property in the axial direction is not deteriorated between the fixing portion 3 and the outer ring 9, rotation in the circumferential direction is prevented, and the sealing portion 3 and the outer ring 9 are sealed with high sealing strength. To be done. The small diameter fixing portion 4 is fixed to the shaft 10 of the constant velocity joint 8 in the same manner, and the same effect can be obtained between the fixing portion 4 and the shaft 10.
【００１１】[0011]
【発明の効果】本発明によれば、ブーツの固着部と被装
着部材との間に軸方向のシール性の低下が生ぜず、しか
も周方向の回転も確実に防止できるうえ、きわめて高い
シール強度を有するブーツの固着構造を得ることができ
る。According to the present invention, the axial sealability is not deteriorated between the fixed portion of the boot and the mounted member, and the circumferential rotation can be surely prevented, and the seal strength is extremely high. It is possible to obtain the fixing structure of the boot having the.
【図１】本発明の一実施例に係るブーツを自動車の等速
ジョイントに装着した態様を示す概略正面図である。FIG. 1 is a schematic front view showing a mode in which a boot according to an embodiment of the present invention is attached to a constant velocity joint of an automobile.
【図２】図１に示したブーツの固着構造の詳細を説明す
る要部の縦断正面図である。FIG. 2 is a vertical cross-sectional front view of essential parts for explaining details of the boot fixing structure shown in FIG.
【図３】本発明の一実施例に係るブーツを一部破断して
示す正面図である。FIG. 3 is a partially cutaway front view showing a boot according to an embodiment of the present invention.
１ ブーツ ２ 蛇腹部 ３，４ 固着部 ５ 締具 ６，７ 環状凹陥部 ８ 等速ジョイント ９ 外輪 １０ 軸 １１ 凹部 １２ リング凹溝 １５ 環状凹溝部 １６ 環状突隆部 DESCRIPTION OF SYMBOLS 1 boot 2 bellows part 3,4 fixing part 5 fastening tool 6,7 annular concave part 8 constant velocity joint 9 outer ring 10 shaft 11 concave part 12 ring concave groove 15 annular concave groove part 16 annular protruding ridge part
Claims (1)
に封止する固着部を有するブーツを被装着部材に装着す
る固着構造において、少なくとも一方の固着部の外周面
に締具を装着する環状凹陥部を形成し、この環状凹陥部
内に環状凹溝部を形成するとともに、上記環状凹溝部に
対応する環状凹陥部の内周面に環状突隆部を形成し、被
装着部材の外周面には、軸方向に凹部を有するリング凹
溝を形成して、ブーツの固着部を環状突隆部が被装着部
材のリング凹溝に嵌入するように締め付けて固着するこ
とを特徴とするブーツの固着構造。1. A fixing structure for mounting a boot having a bellows portion and fixing portions for tightly sealing the member to be attached to both ends of the bellows portion on the member to be attached, wherein a fastener is provided on an outer peripheral surface of at least one of the fixing portions. An annular concave portion to be mounted is formed, an annular concave groove portion is formed in the annular concave portion, and an annular protruding portion is formed on the inner peripheral surface of the annular concave portion corresponding to the circular concave groove portion, and the outer periphery of the mounted member is formed. A boot is characterized in that a ring groove having a recess in the axial direction is formed on the surface, and the fixing portion of the boot is tightened and fixed so that the annular protruding portion fits into the ring groove of the mounted member. Fixed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5212369A JPH0742838A (en) | 1993-08-04 | 1993-08-04 | Boot fixing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5212369A JPH0742838A (en) | 1993-08-04 | 1993-08-04 | Boot fixing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0742838A true JPH0742838A (en) | 1995-02-10 |
Family
ID=16621426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5212369A Pending JPH0742838A (en) | 1993-08-04 | 1993-08-04 | Boot fixing structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0742838A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021089042A (en) * | 2019-12-05 | 2021-06-10 | 日立Astemo株式会社 | Constant velocity universal joint and assembly method of the same |
-
1993
- 1993-08-04 JP JP5212369A patent/JPH0742838A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021089042A (en) * | 2019-12-05 | 2021-06-10 | 日立Astemo株式会社 | Constant velocity universal joint and assembly method of the same |
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