JP2007177923A - Joint boot - Google Patents

Joint boot Download PDF

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JP2007177923A
JP2007177923A JP2005377909A JP2005377909A JP2007177923A JP 2007177923 A JP2007177923 A JP 2007177923A JP 2005377909 A JP2005377909 A JP 2005377909A JP 2005377909 A JP2005377909 A JP 2005377909A JP 2007177923 A JP2007177923 A JP 2007177923A
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protrusion
outer member
peripheral wall
diameter cylindrical
cylindrical portion
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Atsushi Nagaoka
淳 長岡
Masafumi Yamamoto
雅史 山本
Yoko Izumi
庸子 泉
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint boot that hardly comes off a constant velocity joint to secure sealing function. <P>SOLUTION: The joint boot 10 has an encircled portion 26 and an annularly protruded portion 28 on a large diameter cylinder portion 20. The annularly protruded portion 28 has a first protrusion 30 annularly rising from the end face on the side facing the end face of an outer member 16. On the other hand, the encircled portion 26 has a large diameter portion 31 and a small diameter portion 32. On the inner periphery wall of the large diameter portion 31, an annular boss portion 34 is provided for engaging with an annular groove 36 provided in the outer periphery wall of the outer member 16. Besides, on the inner periphery wall of the small diameter portion 32 on the side closer to the end face of the outer member 16 than to the large diameter portion 31, a second protrusion 42 in an annular shape is formed. The first protrusion 30 and the second protrusion 42 function as sealing portions. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、大径な一端部に等速ジョイントのアウタ部材が挿入され、且つ小径な他端部に軸部材が挿入される継手用ブーツに関する。   The present invention relates to a joint boot in which an outer member of a constant velocity joint is inserted into one end portion having a large diameter and a shaft member is inserted into the other end portion having a small diameter.

自動車において、内燃機関、モータ等の各種のエンジンで発生した回転動力をタイヤに伝達するための駆動力伝達機構には、等速ジョイントが組み込まれる。すなわち、駆動力伝達機構は伝達軸をはじめとする複数の伝達軸を有し、前記等速ジョイントは、伝達軸同士を変位自在に連結する。   In an automobile, a constant velocity joint is incorporated in a driving force transmission mechanism for transmitting rotational power generated by various engines such as an internal combustion engine and a motor to a tire. That is, the driving force transmission mechanism has a plurality of transmission shafts including a transmission shaft, and the constant velocity joint connects the transmission shafts so as to be displaceable.

等速ジョイントは、有底筒状部又は有底椀状部を有するアウタ部材と、前記伝達軸の先端に嵌合されたインナ部材とを有し、このインナ部材が別部材を介して前記アウタ部材の内周壁に摺動自在に係合されることで、前記伝達軸が前記アウタ部材に変位自在に連結される。そして、アウタ部材から伝達軸にかけて、ゴム製又は樹脂製の継手用ブーツが装着される。   The constant velocity joint includes an outer member having a bottomed cylindrical part or a bottomed saddle-shaped part, and an inner member fitted to a tip of the transmission shaft, and the inner member is inserted into the outer member via a separate member. The transmission shaft is slidably connected to the outer member by being slidably engaged with the inner peripheral wall of the member. Then, a rubber or resin joint boot is mounted from the outer member to the transmission shaft.

アウタ部材の外径は前記伝達軸の直径に比して大きく、このため、継手用ブーツは、アウタ部材の一端部を挿入する大径筒部と、伝達軸を挿入する小径筒部とを有し、これら大径筒部と小径筒部との間には、大径筒部から小径筒部に向かうに従って徐々に縮径する蛇腹部が介在する。大径筒部、小径筒部は、通常、金属製バンド等の締付部材を介してアウタ部材の外周壁又は伝達軸の側周壁にそれぞれ締め付けられる。   Since the outer diameter of the outer member is larger than the diameter of the transmission shaft, the joint boot has a large-diameter cylindrical portion for inserting one end of the outer member and a small-diameter cylindrical portion for inserting the transmission shaft. And between these large diameter cylinder parts and small diameter cylinder parts, the bellows part gradually diameter-reduced as it goes to a small diameter cylinder part from a large diameter cylinder part intervenes. The large-diameter cylindrical portion and the small-diameter cylindrical portion are usually fastened to the outer peripheral wall of the outer member or the side peripheral wall of the transmission shaft via a fastening member such as a metal band.

この種の継手用ブーツは、該継手用ブーツに予め封入されたグリース組成物を保持するとともに、外部から水や汚泥等の異物が入り込むことを防止するシール部材として機能する。   This type of joint boot functions as a seal member that retains the grease composition sealed in advance in the joint boot and prevents foreign substances such as water and sludge from entering from the outside.

ところで、例えば、転舵が行われた際には、アウタ部材に対して伝達軸が傾斜するように変位し、これに追従して蛇腹部が撓む。この撓みに伴い、大径筒部の内周壁がアウタ部材の外周壁に対して離間する、いわゆる捲れ現象が起こることがある。このような事態が発生すると、継手用ブーツに封入されたグリース組成物が漏洩する懸念がある。   By the way, for example, when steering is performed, the transmission shaft is displaced so as to be inclined with respect to the outer member, and the bellows portion is bent following this displacement. Along with this bending, a so-called drooling phenomenon may occur in which the inner peripheral wall of the large-diameter cylindrical portion is separated from the outer peripheral wall of the outer member. When such a situation occurs, there is a concern that the grease composition enclosed in the joint boot leaks.

そこで、捲れ現象が起こった場合であってもグリース組成物が漏洩することを回避するべく、継手用ブーツのシール性を向上させることが想起される。この種の従来技術としては、特許文献1記載の技術が挙げられる。すなわち、該特許文献1においては、大径筒部の内部に端面シール部を設け、該端面シール部をアウタ部材の端面に密接させることが提案されている。   Thus, it is conceived that the sealing performance of the joint boot is improved in order to avoid the leakage of the grease composition even when the sag phenomenon occurs. As this type of prior art, there is a technique described in Patent Document 1. That is, Patent Document 1 proposes that an end face seal portion is provided inside the large-diameter cylindrical portion, and the end face seal portion is brought into close contact with the end face of the outer member.

特開2004−263730号公報JP 2004-263730 A

特許文献1に記載された従来技術は、アウタ部材と継手用ブーツに位相差が生じた場合のシール性を確保することを図るものである。一方、上記した捲れ現象は、継手用ブーツの内周壁がアウタ部材の外周壁から離間する現象であり、このような現象が発生したときに、特許文献1に記載された端面シール部でシール性を確保できるか否かは今ひとつ明らかではない。   The conventional technique described in Patent Document 1 is intended to ensure sealing performance when a phase difference occurs between the outer member and the joint boot. On the other hand, the above-mentioned squeezing phenomenon is a phenomenon in which the inner peripheral wall of the joint boot is separated from the outer peripheral wall of the outer member. When such a phenomenon occurs, the end face seal portion described in Patent Document 1 has a sealing property. It is not yet clear whether it can be secured.

本発明は上記した問題を解決するためになされたもので、捲れ現象が起こった場合であってもグリース組成物が漏洩することを十分に回避可能なシール能を有する継手用ブーツを提供することを目的とする。   The present invention has been made to solve the above-described problems, and provides a joint boot having a sealing ability that can sufficiently prevent leakage of a grease composition even when a stagnation phenomenon occurs. With the goal.

前記の目的を達成するために、本発明は、等速ジョイントのアウタ部材が挿入される大径筒部と、軸部材が挿入される小径筒部と、前記大径筒部と前記小径筒部との間に介在して前記大径筒部から前記小径筒部に向かうに従って縮径する蛇腹部とを具備する継手用ブーツであって、
前記大径筒部は、前記アウタ部材の外周壁を囲繞する囲繞部と、前記囲繞部における前記小径筒部側に臨む端部に設けられて且つ前記アウタ部材の端面に対向する突出部とを備え、
前記突出部の一端面に、前記アウタ部材の前記端面に当接する第1突起が設けられ、
前記囲繞部の内周壁に、前記アウタ部材の前記外周壁に当接する第2突起が設けられ、
前記第2突起は、前記囲繞部の外周壁に締付部材が締め付けられることに伴って収縮することを特徴とする。
In order to achieve the above object, the present invention provides a large-diameter cylindrical portion into which an outer member of a constant velocity joint is inserted, a small-diameter cylindrical portion into which a shaft member is inserted, the large-diameter cylindrical portion, and the small-diameter cylindrical portion. A joint boot comprising an accordion portion that decreases in diameter as it goes from the large-diameter cylindrical portion toward the small-diameter cylindrical portion, interposed between and
The large-diameter cylindrical portion includes an enclosure portion that surrounds the outer peripheral wall of the outer member, and a protruding portion that is provided at an end portion of the enclosure portion that faces the small-diameter tubular portion side and faces the end surface of the outer member. Prepared,
A first protrusion that abuts against the end surface of the outer member is provided on one end surface of the protrusion,
A second protrusion abutting on the outer peripheral wall of the outer member is provided on the inner peripheral wall of the surrounding portion;
The second protrusion is contracted as the tightening member is tightened to the outer peripheral wall of the surrounding portion.

この継手用ブーツにおいては、突出部をアウタ部材の端面から離間させる方向の力が作用した場合、第1突起が突出部の端面から***するように設けられているので、該第1突起の頂部は、アウタ部材の端面から離間し難い。   In this joint boot, since the first projection is provided so as to protrude from the end surface of the projection when a force in a direction in which the projection is separated from the end surface of the outer member is applied, the top of the first projection Is difficult to separate from the end surface of the outer member.

また、仮に第1突起の頂部がアウタ部材の端面から離間したとしても、継手用ブーツに作用する力は、突出部を端面から離間させる方向に変位させることで著しく緩和され、囲繞部に作用する力は小さくなる。従って、第2突起がアウタ部材の外周壁から離間することは困難である。   Further, even if the top of the first protrusion is separated from the end surface of the outer member, the force acting on the joint boot is remarkably relieved by displacing the protruding portion in the direction away from the end surface, and acts on the surrounding portion. The power is reduced. Therefore, it is difficult for the second protrusion to be separated from the outer peripheral wall of the outer member.

仮に囲繞部の一部がアウタ部材の端面から離間したとしても、この際には、収縮した第2突起が伸張する。これにより、アウタ部材の外周壁に対する第2突起の頂部の当接が保たれる。   Even if a part of the surrounding portion is separated from the end surface of the outer member, the contracted second protrusion is extended at this time. Thereby, contact | abutting of the top part of the 2nd protrusion with respect to the outer peripheral wall of an outer member is maintained.

このように、本発明においては、大径筒部に第1突起及び第2突起が設けられており、両突起がアウタ部材の端面又は外周壁から離間し難いため捲れ現象が生じ難い。仮に捲れ現象が起こったとしても、第1突起及び第2突起がシール部として機能することにより、継手用ブーツのシール機能が確保される。従って、グリース組成物が漏洩することを回避することができる。   As described above, in the present invention, the first protrusion and the second protrusion are provided on the large-diameter cylindrical portion, and the two protrusions are unlikely to be separated from the end surface or the outer peripheral wall of the outer member, so that a drooling phenomenon hardly occurs. Even if a drooling phenomenon occurs, the sealing function of the joint boot is ensured by the first protrusion and the second protrusion functioning as the seal portion. Therefore, leakage of the grease composition can be avoided.

ここで、継手用ブーツの囲繞部の内周壁に環状凸部を設けるとともにアウタ部材の外周壁に環状溝を設け、環状凸部を環状溝に係合することが好ましい。この場合、締付部材を締め付けることに伴い、環状凸部が環状溝の深さ方向に前進する。これに追従し、アウタ部材の端面に接近する方向の力が突出部に作用する。この力によって、アウタ部材の端面から突出部を離間させる方向に作用する力が消費されるので、アウタ部材の端面に対して第1突起が一層離間し難くなる。   Here, it is preferable that an annular convex portion is provided on the inner peripheral wall of the surrounding portion of the joint boot, an annular groove is provided on the outer peripheral wall of the outer member, and the annular convex portion is engaged with the annular groove. In this case, as the tightening member is tightened, the annular protrusion advances in the depth direction of the annular groove. Following this, a force in a direction approaching the end face of the outer member acts on the protrusion. This force consumes a force acting in the direction of separating the protruding portion from the end surface of the outer member, so that the first protrusion becomes more difficult to separate from the end surface of the outer member.

しかも、この場合、締付部材の締め付けに伴って第1突起が収縮しているので、仮に突出部がアウタ部材の端面から離間する方向に変位したとしても、第1突起が伸張することで、アウタ部材の端面に対する第1突起の頂部の当接が保たれる。すなわち、この構成においては、第1突起のシール能が大きく向上し、グリース組成物が漏洩することを回避することが一層容易となる。   Moreover, in this case, since the first protrusion is contracted as the tightening member is tightened, even if the protrusion is displaced in a direction away from the end surface of the outer member, the first protrusion is extended, The contact of the top of the first protrusion with the end surface of the outer member is maintained. That is, in this configuration, the sealing performance of the first protrusion is greatly improved, and it is easier to avoid leakage of the grease composition.

なお、環状凸部は、第2突起に比してアウタ部材の端面から離間する側に配設する。   The annular protrusion is disposed on the side away from the end surface of the outer member as compared with the second protrusion.

また、本発明は、等速ジョイントのアウタ部材が挿入される大径筒部と、軸部材が挿入される小径筒部と、前記大径筒部と前記小径筒部との間に介在して前記大径筒部から前記小径筒部に向かうに従って縮径する蛇腹部とを具備する継手用ブーツであって、
前記大径筒部は、前記アウタ部材の外周壁を囲繞する囲繞部と、前記囲繞部における前記小径筒部側に臨む端部に設けられて且つ前記アウタ部材の端面に対向する突出部とを備え、
前記突出部の一端面に、前記アウタ部材の前記端面に当接する第1突起が設けられ、
前記突出部の前記一端面における前記第1突起よりも前記囲繞部に近接する側に、前記アウタ部材の前記端面又は前記外周壁のいずれかに当接する第2突起が設けられ、
前記第2突起は、前記囲繞部の外周壁に締付部材が締め付けられることに伴って収縮することを特徴とする。
The present invention also includes a large-diameter cylindrical portion into which the outer member of the constant velocity joint is inserted, a small-diameter cylindrical portion into which the shaft member is inserted, and the large-diameter cylindrical portion and the small-diameter cylindrical portion. A joint boot comprising a bellows portion that decreases in diameter as it goes from the large-diameter cylindrical portion toward the small-diameter cylindrical portion,
The large-diameter cylindrical portion includes an enclosure portion that surrounds the outer peripheral wall of the outer member, and a protruding portion that is provided at an end portion of the enclosure portion that faces the small-diameter tubular portion side and faces the end surface of the outer member. Prepared,
A first protrusion that abuts against the end surface of the outer member is provided on one end surface of the protrusion,
A second protrusion that comes into contact with either the end face of the outer member or the outer peripheral wall is provided closer to the surrounding part than the first protrusion on the one end face of the protruding part,
The second protrusion is contracted as the tightening member is tightened to the outer peripheral wall of the surrounding portion.

すなわち、第2突起を突出部に設け、アウタ部材の外周壁又は端面に当接させるようにしてもよい。この場合においても、上記と同様の理由から継手用ブーツのシール機能が確保される。   That is, the second protrusion may be provided on the projecting portion, and may be brought into contact with the outer peripheral wall or the end surface of the outer member. Even in this case, the sealing function of the joint boot is ensured for the same reason as described above.

そして、上記と同様に、囲繞部の内周壁に環状凸部を設け、該環状凸部を、アウタ部材の外周壁に設けられた環状溝に係合することが好ましい。環状凸部が環状溝の深さ方向に前進することで、アウタ部材の端面に対する第1突起の当接を維持することが容易となるからである。   In the same manner as described above, it is preferable that an annular convex portion is provided on the inner peripheral wall of the surrounding portion, and the annular convex portion is engaged with an annular groove provided on the outer peripheral wall of the outer member. It is because it becomes easy to maintain the contact of the first projection with respect to the end surface of the outer member by advancing the annular convex portion in the depth direction of the annular groove.

本発明によれば、継手用ブーツを構成する大径筒部に、等速ジョイントのアウタ部材の外周壁を囲繞する囲繞部と、該アウタ部材の端面に対向する突出部とを設け、この中の少なくとも突出部に、シール部として機能する突起を形成するようにしている。突出部がアウタ部材の端面から離間し難く、仮に離間する方向に変位したとしても、この突起が前記端面から離間し難いので、継手用ブーツのシール機能が維持される。   According to the present invention, the large-diameter cylindrical portion constituting the joint boot is provided with the surrounding portion that surrounds the outer peripheral wall of the outer member of the constant velocity joint, and the protruding portion that faces the end surface of the outer member. A protrusion functioning as a seal portion is formed at least on the protruding portion. Even if the projecting portion is difficult to separate from the end surface of the outer member and is displaced in the direction of separating, the projection is difficult to separate from the end surface, so that the sealing function of the joint boot is maintained.

仮に前記突起が前記端面から離間したとしても、前記突出部又は前記囲繞部に別の突起が設けられ、この突起もアウタ部材の前記端面又は前記外周壁から離間し難いので、継手用ブーツのシール機能が確保される。   Even if the projection is separated from the end surface, another projection is provided on the projecting portion or the surrounding portion, and this projection is also difficult to separate from the end surface or the outer peripheral wall of the outer member. Function is secured.

結局、本発明によれば、シール機能に優れる継手用ブーツを構成することができ、グリース組成物が大径筒部から漏洩することを防止することができる。   Eventually, according to the present invention, it is possible to configure a joint boot having an excellent sealing function and to prevent the grease composition from leaking from the large-diameter cylindrical portion.

以下、本発明に係る継手用ブーツにつき好適な実施の形態を挙げ、添付の図面を参照して詳細に説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a joint boot according to the present invention will be described in detail with reference to the accompanying drawings.

図1は、第1実施形態に係る継手用ブーツ10が組み込まれた継手構造12の要部概略斜視図である。この継手構造12は、エンジンからの駆動力をタイヤに伝達する駆動力伝達機構を構成する。該継手構造12において、第1実施形態に係る継手用ブーツ10は、トリポート型等速ジョイント14のアウタ部材16の一部から伝達軸18の端部にわたって装着されている。   FIG. 1 is a schematic perspective view of a main part of a joint structure 12 in which a joint boot 10 according to the first embodiment is incorporated. The joint structure 12 constitutes a driving force transmission mechanism that transmits the driving force from the engine to the tire. In the joint structure 12, the joint boot 10 according to the first embodiment is mounted from a part of the outer member 16 of the triport type constant velocity joint 14 to the end of the transmission shaft 18.

この継手用ブーツ10は、その一端部に開口径がアウタ部材16の外径に対応する大径筒部20を有し、且つ他端部に伝達軸18が挿入される小径筒部22を有する。また、継手用ブーツ10において、大径筒部20と小径筒部22との間には、山部と谷部が交互に連続するとともに、大径筒部20から小径筒部22に向かうに従って縮径する蛇腹部24が介在する。   The joint boot 10 has a large-diameter cylindrical portion 20 having an opening diameter corresponding to the outer diameter of the outer member 16 at one end, and a small-diameter cylindrical portion 22 into which the transmission shaft 18 is inserted at the other end. . Further, in the joint boot 10, crests and troughs are alternately continued between the large-diameter cylindrical portion 20 and the small-diameter cylindrical portion 22, and contracted toward the small-diameter cylindrical portion 22 from the large-diameter cylindrical portion 20. A diameter bellows portion 24 is interposed.

図2に拡大して示すように、大径筒部20は、アウタ部材16の外周壁を囲繞する囲繞部26を有する。そして、囲繞部26において、小径筒部22側に臨む端部には、該端部から直径方向内方に指向して突出した環状突出部28が連なって設けられている。   As shown in an enlarged view in FIG. 2, the large-diameter cylindrical portion 20 has a surrounding portion 26 that surrounds the outer peripheral wall of the outer member 16. And in the surrounding part 26, the cyclic | annular protrusion part 28 which protruded toward the diametrically inward from this edge part is provided in the end part which faces the small diameter cylinder part 22 side.

環状突出部28は、囲繞部26の軸線方向に略直交する方向に延在しており、このため、アウタ部材16の一端部が大径筒部20に挿入された際、該アウタ部材16の端面に対向する。そして、環状突出部28において、アウタ部材16の端面に臨む側の端面には、該環状突出部28の円周方向に沿って第1突起30が設けられている。   The annular projecting portion 28 extends in a direction substantially orthogonal to the axial direction of the surrounding portion 26. For this reason, when one end portion of the outer member 16 is inserted into the large-diameter cylindrical portion 20, Opposite the end face. In the annular protrusion 28, a first protrusion 30 is provided on the end surface facing the end surface of the outer member 16 along the circumferential direction of the annular protrusion 28.

一方の囲繞部26は、後述するように、アウタ部材16の一端部が大径筒部20に挿入されることに伴って該アウタ部材16の外周壁を囲繞する部位である。この囲繞部26には、厚肉の大径部31と、該大径部31に連設されて蛇腹部24に近接する小径部32が設けられている。   The one surrounding portion 26 is a portion that surrounds the outer peripheral wall of the outer member 16 as one end portion of the outer member 16 is inserted into the large-diameter cylindrical portion 20 as described later. The surrounding portion 26 includes a thick-walled large-diameter portion 31 and a small-diameter portion 32 that is connected to the large-diameter portion 31 and is close to the bellows portion 24.

この中、大径部31の内周壁には、環状凸部34が直径方向内方に向かって突出するように形成されている。一方、アウタ部材16の外周壁には環状溝36が設けられており、該外周壁に囲繞部26の内周壁が当接すると、前記環状凸部34がこの環状溝36に嵌合される。また、大径部31の外周壁には、締付部材としての金属製バンド38を巻回するバンド装着溝40が陥没形成されている。   Among these, an annular convex portion 34 is formed on the inner peripheral wall of the large-diameter portion 31 so as to protrude inward in the diameter direction. On the other hand, an annular groove 36 is provided on the outer peripheral wall of the outer member 16, and when the inner peripheral wall of the surrounding portion 26 comes into contact with the outer peripheral wall, the annular convex portion 34 is fitted into the annular groove 36. A band mounting groove 40 around which a metal band 38 as a fastening member is wound is formed in the outer peripheral wall of the large-diameter portion 31.

そして、小径部32の内周壁には、該内周壁の円周方向に沿って環状の第2突起42が設けられている。すなわち、環状凸部34は、第2突起42に比して環状突出部28から離間する側に形成されている。ここで、第2突起42の高さは、その頂部が前記大径部31の内周壁の壁面よりも高くなるように設定されている。   An annular second protrusion 42 is provided on the inner peripheral wall of the small diameter portion 32 along the circumferential direction of the inner peripheral wall. That is, the annular protrusion 34 is formed on the side away from the annular protrusion 28 as compared with the second protrusion 42. Here, the height of the second protrusion 42 is set such that the top thereof is higher than the wall surface of the inner peripheral wall of the large-diameter portion 31.

また、環状突出部28と囲繞部26との境界には、前記蛇腹部24が連設されている。換言すれば、この場合、蛇腹部24は、環状突出部28と囲繞部26との境界を基端部として***している。   The bellows portion 24 is connected to the boundary between the annular projecting portion 28 and the surrounding portion 26. In other words, in this case, the bellows portion 24 protrudes with the boundary between the annular projecting portion 28 and the surrounding portion 26 as a base end portion.

図1に示すように、小径筒部22には、所定幅で陥没した環状のバンド装着溝44が形成され、該バンド装着溝44には、締付部材である金属製バンド46が装着される。金属製バンド46の外周面の一部は、図示しない加締め治具によって左右方向から挟み込むように加締められ、これにより、金属製バンド46が小径筒部22を介して伝達軸18の側周壁を囲繞するように装着される。すなわち、小径筒部22が伝達軸18の側周壁に緊締される。   As shown in FIG. 1, an annular band mounting groove 44 that is depressed with a predetermined width is formed in the small diameter cylindrical portion 22, and a metal band 46 that is a fastening member is mounted in the band mounting groove 44. . A part of the outer peripheral surface of the metal band 46 is crimped so as to be sandwiched from the left and right directions by a crimping jig (not shown), whereby the metal band 46 is connected to the side peripheral wall of the transmission shaft 18 via the small diameter cylindrical portion 22. It is mounted so as to surround. That is, the small diameter cylindrical portion 22 is fastened to the side peripheral wall of the transmission shaft 18.

なお、図1中、参照符号48、50は、金属製バンド38、46の外周面が加締められることに伴って半径方向外方に所定長で突出形成される加締部を示す。   In FIG. 1, reference numerals 48 and 50 indicate caulking portions that are formed to protrude outward in the radial direction by a predetermined length as the outer peripheral surfaces of the metal bands 38 and 46 are caulked.

以上の構成において、継手用ブーツ10内には、アウタ部材16及び伝達軸18が大径筒部20及び小径筒部22にそれぞれ挿入される前にグリース組成物が予め充填される。   In the above configuration, the joint boot 10 is pre-filled with the grease composition before the outer member 16 and the transmission shaft 18 are inserted into the large diameter cylindrical portion 20 and the small diameter cylindrical portion 22, respectively.

第1実施形態に係る継手用ブーツ10は、基本的には以上のように構成されるものであり、次にその作用効果につき説明する。   The joint boot 10 according to the first embodiment is basically configured as described above. Next, the function and effect will be described.

継手構造12を構成する際、継手用ブーツ10の小径筒部22に伝達軸18が挿入される。その後、小径筒部22のバンド装着溝44に金属製バンド46が装着され、さらに、金属製バンド46の外周面の一部が図示しない加締め治具で左右方向から挟み込むように加締められる。これにより、金属製バンド46が伝達軸18に締め付けられる。また、この加締めに伴い、金属製バンド46の外周面に加締部50(図1参照)が突出形成される。   When configuring the joint structure 12, the transmission shaft 18 is inserted into the small diameter cylindrical portion 22 of the joint boot 10. Thereafter, the metal band 46 is mounted in the band mounting groove 44 of the small-diameter cylindrical portion 22, and further, a part of the outer peripheral surface of the metal band 46 is crimped by a crimping jig (not shown) so as to be sandwiched from the left and right directions. Thereby, the metal band 46 is fastened to the transmission shaft 18. Further, along with this caulking, a caulking portion 50 (see FIG. 1) is formed to protrude from the outer peripheral surface of the metal band 46.

小径筒部22に挿入された伝達軸18の先端には、インナ部材としてのスパイダが取り付けられる。このスパイダは、環状のリング部と、該リング部の側周壁から互いに等角度で離間して突出した突出部とを有し、該突出部の各々にはローラが回転自在に係止される。スパイダが伝達軸18ごとアウタ部材16の開口端部から内部に挿入されるとともに、前記ローラがアウタ部材16の内周壁の双方に設けられた案内溝に摺接可能に挿入され、これにより、トリポート型等速ジョイント14と伝達軸18とが連結されるに至る。   A spider as an inner member is attached to the tip of the transmission shaft 18 inserted into the small diameter cylindrical portion 22. The spider has an annular ring portion and protruding portions that protrude from the side peripheral wall of the ring portion at equal angles, and a roller is rotatably locked to each of the protruding portions. The spider is inserted into the inner end of the outer member 16 together with the transmission shaft 18, and the roller is slidably inserted into guide grooves provided on both inner peripheral walls of the outer member 16. The mold constant velocity joint 14 and the transmission shaft 18 are connected.

その一方で、大径筒部20にアウタ部材16の前記開口端部が挿入される。この際、大径筒部20を構成する囲繞部26によってアウタ部材16の開口端部の外周壁が囲繞され、最終的に、囲繞部26を構成する大径部31の内周壁がアウタ部材16の外周壁に当接する。   On the other hand, the open end portion of the outer member 16 is inserted into the large diameter cylindrical portion 20. At this time, the outer peripheral wall of the opening end portion of the outer member 16 is surrounded by the surrounding portion 26 constituting the large diameter cylindrical portion 20, and finally, the inner peripheral wall of the large diameter portion 31 constituting the surrounding portion 26 is the outer member 16. Abuts against the outer peripheral wall.

アウタ部材16の一端部が囲繞部26に挿入されると、図3に示すように、囲繞部26の内周壁に設けられた環状凸部34がアウタ部材16の外周壁に設けられた環状溝36に係合する。この係合に伴い、継手用ブーツ10の位置ずれ防止がなされる。囲繞部26の肉厚を大きくするほど、アウタ部材16に対する該囲繞部26の締め付け力が大きくなり、大径筒部20の位置ずれが一層起こり難くなる。   When one end portion of the outer member 16 is inserted into the surrounding portion 26, as shown in FIG. 3, the annular protrusion 34 provided on the inner peripheral wall of the surrounding portion 26 has an annular groove provided on the outer peripheral wall of the outer member 16. 36 is engaged. With this engagement, the displacement of the joint boot 10 is prevented. As the thickness of the surrounding portion 26 is increased, the tightening force of the surrounding portion 26 with respect to the outer member 16 is increased, and the displacement of the large-diameter cylindrical portion 20 is less likely to occur.

同時に、第2突起42の頂部がアウタ部材16の外周壁に当接する一方、第1突起30の頂部がアウタ部材16の端面に当接する。これら第1突起30及び第2突起42は、アウタ部材16から押圧されることによって、圧潰される方向に若干収縮する。   At the same time, the top of the second protrusion 42 contacts the outer peripheral wall of the outer member 16, while the top of the first protrusion 30 contacts the end surface of the outer member 16. The first protrusion 30 and the second protrusion 42 are slightly contracted in the direction of being crushed by being pressed from the outer member 16.

その後、バンド装着溝40に金属製バンド38が装着され、該金属製バンド38の外周面の一部が図示しない加締め治具によって左右方向から挟み込むように加締められる。この加締めに伴い、金属製バンド38の外周面に加締部48が突出形成される。   Thereafter, the metal band 38 is mounted in the band mounting groove 40, and a part of the outer peripheral surface of the metal band 38 is crimped by a crimping jig (not shown) so as to be sandwiched from the left and right directions. Along with this caulking, a caulking portion 48 protrudes from the outer peripheral surface of the metal band 38.

金属製バンド38が加締められると、環状凸部34が環状溝36の深さ方向に一層前進し、このために囲繞部26がアウタ部材16の外周壁に一層引き寄せられ、最終的に、該囲繞部26の大径部31の内周壁が全体にわたってアウタ部材16の外周壁に密接するとともに、第2突起42がさらに収縮する。   When the metal band 38 is crimped, the annular protrusion 34 is further advanced in the depth direction of the annular groove 36. For this reason, the surrounding portion 26 is further drawn toward the outer peripheral wall of the outer member 16, and finally, The inner peripheral wall of the large-diameter portion 31 of the surrounding portion 26 is in close contact with the outer peripheral wall of the outer member 16 as a whole, and the second protrusion 42 further contracts.

同時に、環状凸部34が環状溝36の深さ方向に前進することに伴い、環状突出部28に対し、金属製バンド38の締付方向(図3中の矢印X方向)に直交し且つアウタ部材16に対して接近する方向(矢印Y方向)の力が作用する。この力によって該環状突出部28がアウタ部材16の端面に接近するので、第1突起30もさらに収縮する。   At the same time, as the annular protrusion 34 advances in the depth direction of the annular groove 36, the annular protrusion 28 is perpendicular to the fastening direction of the metal band 38 (in the direction of the arrow X in FIG. 3) and the outer A force in the direction approaching the member 16 (arrow Y direction) acts. Since the annular protrusion 28 approaches the end surface of the outer member 16 by this force, the first protrusion 30 is further contracted.

ステアリングの操作によって転舵が行われると、伝達軸18がトリポート型等速ジョイント14に対して傾斜するように変位する。この際、継手用ブーツ10は、蛇腹部24が伸縮することで前記変位に対応し、これにより継手用ブーツ10に作用する応力が緩和されるが、傾斜角度によっては、囲繞部26の内周壁がアウタ部材16の外周壁から離間する方向に引っ張られたり、環状突出部28の一端面がアウタ部材16の端面から離間する方向に引っ張られたりすることもある。   When steering is performed by the steering operation, the transmission shaft 18 is displaced so as to be inclined with respect to the triport constant velocity joint 14. At this time, the joint boot 10 responds to the displacement by the expansion and contraction of the bellows part 24, thereby relieving the stress acting on the joint boot 10, but depending on the inclination angle, the inner peripheral wall of the surrounding part 26 May be pulled away from the outer peripheral wall of the outer member 16, or one end face of the annular protrusion 28 may be pulled away from the end face of the outer member 16.

しかしながら、この場合、環状突出部28には、上記したようにアウタ部材16の端面に接近する方向の力が作用している。この力によって、環状突出部28の一端面をアウタ部材16の端面から離間する方向に引っ張る力が緩和されるので、環状突出部28、ひいては第1突起30がアウタ部材16の端面から離間することが回避される。   However, in this case, the force in the direction approaching the end surface of the outer member 16 acts on the annular projecting portion 28 as described above. By this force, the force that pulls the one end surface of the annular protrusion 28 in the direction away from the end surface of the outer member 16 is relieved, so that the annular protrusion 28 and thus the first protrusion 30 are separated from the end surface of the outer member 16. Is avoided.

環状突出部28の一端面をアウタ部材16の端面から離間する方向に引っ張る力が大きい場合であっても、この際には、金属製バンド38の緊締に伴って収縮した第1突起30及び第2突起42が伸張する。このような伸張が起こることにより、アウタ部材16の端面に対する第1突起30の頂部の当接、及びアウタ部材16の外周壁に対する第2突起42の頂部の当接が維持される。   Even when the force for pulling the one end surface of the annular protrusion 28 in the direction away from the end surface of the outer member 16 is large, the first protrusion 30 and the first protrusion 30 contracted with the tightening of the metal band 38 at this time Two protrusions 42 extend. By such extension, the contact of the top of the first protrusion 30 with the end surface of the outer member 16 and the contact of the top of the second protrusion 42 with the outer peripheral wall of the outer member 16 are maintained.

仮に、第1突起30の頂部がアウタ部材16の端面から離間した場合であっても、継手用ブーツ10に作用する応力は、環状突出部28をアウタ部材16の端面から離間する方向に引っ張ることで著しく緩和され、囲繞部26における小径部32に作用する応力は小さくなる。   Even if the top of the first protrusion 30 is separated from the end surface of the outer member 16, the stress acting on the joint boot 10 pulls the annular protrusion 28 in a direction away from the end surface of the outer member 16. And the stress acting on the small diameter portion 32 in the surrounding portion 26 is reduced.

しかも、この場合、環状凸部34が環状溝36に係合しているため、囲繞部26をアウタ部材16の端面側から離脱させる力が作用した場合、環状凸部34が環状溝36の側壁に堰止される。従って、囲繞部26、ひいては、第2突起42がアウタ部材16の外周壁から離間することは著しく困難である。   In addition, in this case, since the annular convex portion 34 is engaged with the annular groove 36, when a force is applied to disengage the surrounding portion 26 from the end surface side of the outer member 16, the annular convex portion 34 becomes the side wall of the annular groove 36. Will be blocked. Therefore, it is extremely difficult for the surrounding portion 26 and thus the second protrusion 42 to be separated from the outer peripheral wall of the outer member 16.

以上のような理由から、第2突起42の頂部がアウタ部材16の外周壁から離間することが回避される。   For the reasons as described above, the top portion of the second protrusion 42 is prevented from being separated from the outer peripheral wall of the outer member 16.

このように、第1実施形態では、アウタ部材16の端面及び外周壁に第1突起30、第2突起42の各頂部を当接させ、金属製バンド46の締め付けによってこれら第1突起30及び第2突起42を収縮させることにより、いわゆる2重シールを設けるようにしている。環状突出部28及び小径部32をアウタ部材16から離間する方向に引っ張る力が作用した場合、先ず、収縮した第1突起30及び第2突起42が伸張することでアウタ部材16に対する当接が維持される。また、仮に第1突起30(第1シール)がアウタ部材16の端面から離間したとしても、第2突起42(第2シール)の頂部がアウタ部材16の外周壁から離間し難いので、継手用ブーツ10のシール機能を保つことができ、結局、該継手用ブーツ10に封入されたグリース組成物が漏洩することを回避することができる。   Thus, in the first embodiment, the top portions of the first protrusion 30 and the second protrusion 42 are brought into contact with the end face and the outer peripheral wall of the outer member 16, and the first protrusion 30 and the first protrusion 30 are tightened by tightening the metal band 46. The two protrusions 42 are contracted to provide a so-called double seal. When a force pulling the annular protrusion 28 and the small-diameter portion 32 in the direction away from the outer member 16 is applied, first, the contracted first protrusion 30 and second protrusion 42 are extended to maintain the contact with the outer member 16. Is done. Further, even if the first protrusion 30 (first seal) is separated from the end surface of the outer member 16, the top of the second protrusion 42 (second seal) is difficult to separate from the outer peripheral wall of the outer member 16. The sealing function of the boot 10 can be maintained, and eventually the leakage of the grease composition enclosed in the joint boot 10 can be avoided.

次に、第2実施形態に係る継手用ブーツにつき図4を参照して説明する。なお、図1〜図3に示される構成要素に対応する構成要素の中で同一形状のものには同一の参照符号を付し、その詳細な説明を省略する。   Next, a joint boot according to a second embodiment will be described with reference to FIG. In addition, the same reference number is attached | subjected to the thing of the same shape among the components corresponding to the component shown by FIGS. 1-3, The detailed description is abbreviate | omitted.

この第2実施形態に係る継手用ブーツ60における囲繞部62は、該囲繞部62の軸線方向に沿って略等径に設けられている。そして、その内周壁には、環状凸部34が突出形成されている。環状凸部34から環状突出部28に至るまでの寸法は、アウタ部材16の環状溝36から端面に至るまでの寸法に略対応する。   The surrounding portion 62 in the joint boot 60 according to the second embodiment is provided with a substantially equal diameter along the axial direction of the surrounding portion 62. And the annular convex part 34 is protrudingly formed in the inner peripheral wall. The dimension from the annular protrusion 34 to the annular protrusion 28 substantially corresponds to the dimension from the annular groove 36 of the outer member 16 to the end surface.

第2実施形態では、第2突起64は、環状突出部28におけるアウタ部材16の端面に臨む側の端面に、環状突出部28の円周方向に沿って環状に設けられている。この場合、第2突起64は、第1突起30に比して長尺となるように延在し、且つ裾部から頂部にわたるまで略同一肉厚に設定されている。   In the second embodiment, the second protrusion 64 is provided in an annular shape along the circumferential direction of the annular protrusion 28 on the end face of the annular protrusion 28 facing the end face of the outer member 16. In this case, the second protrusion 64 extends so as to be longer than the first protrusion 30 and is set to have substantially the same thickness from the bottom to the top.

大径筒部20にアウタ部材16の一端部が挿入されると、該アウタ部材16の端面に第1突起30の頂部が当接し、その一方で、外周壁に第2突起64の内周壁面が当接する。また、第2突起64の外周壁面は、囲繞部62の内周壁に当接する。以上の当接により、第1突起30は図4における矢印Aに沿って収縮し、第2突起64は矢印Bに沿って収縮する。最終的に、環状突出部28は、その一端面がアウタ部材16の端面に当接する。   When one end portion of the outer member 16 is inserted into the large-diameter cylindrical portion 20, the top portion of the first protrusion 30 comes into contact with the end surface of the outer member 16, while the inner peripheral wall surface of the second protrusion 64 contacts the outer peripheral wall. Abut. Further, the outer peripheral wall surface of the second protrusion 64 abuts on the inner peripheral wall of the surrounding portion 62. With the above contact, the first protrusion 30 contracts along the arrow A in FIG. 4, and the second protrusion 64 contracts along the arrow B. Eventually, one end surface of the annular protrusion 28 comes into contact with the end surface of the outer member 16.

この状態からバンド装着溝40に金属製バンド38が装着され、該金属製バンド38が締め付けられると、薄肉の第2突起64は、囲繞部62の内周壁とアウタ部材16の外周壁との間で一層収縮する。また、上記第1実施形態と同様の理由から、アウタ部材16の端面に接近する方向に作用する力が環状突出部28に加わり、このために第1突起30も収縮する。   When the metal band 38 is mounted in the band mounting groove 40 from this state and the metal band 38 is tightened, the thin second protrusion 64 is formed between the inner peripheral wall of the surrounding portion 62 and the outer peripheral wall of the outer member 16. Shrink further. Further, for the same reason as in the first embodiment, a force acting in a direction approaching the end surface of the outer member 16 is applied to the annular projecting portion 28, so that the first projection 30 also contracts.

この第2実施形態においても、転舵がなされること等に伴って伝達軸18(図1参照)が傾斜し、これに追従して環状突出部28(図4参照)をアウタ部材16の端面から離間する方向の力が作用した際、環状突出部28がアウタ部材16の端面から離間し難い。上記と同様に、この力が、環状突出部28に予め作用しているアウタ部材16の端面に接近する方向の力を緩和することで消費されるからである。   Also in the second embodiment, the transmission shaft 18 (see FIG. 1) is inclined in accordance with turning or the like, and the annular protrusion 28 (see FIG. 4) follows the end of the outer member 16 following this. When a force in a direction away from the outer member 16 is applied, the annular protrusion 28 is difficult to separate from the end surface of the outer member 16. This is because, similarly to the above, this force is consumed by relaxing the force in the direction approaching the end face of the outer member 16 acting on the annular protrusion 28 in advance.

また、仮に環状突出部28がアウタ部材16の端面から離間したとしても、第1突起30が伸張し、アウタ部材16の端面に対する第1突起30の頂部の当接が維持される。第1突起30の頂部がアウタ部材16の端面から離間した場合であっても、第2突起64が伸張してアウタ部材16の外周壁に対する当接を維持する。しかも、これらの当接の維持は、環状凸部34が環状溝36の側壁に堰止されることで一層容易となる。   Even if the annular protrusion 28 is separated from the end surface of the outer member 16, the first protrusion 30 is extended, and the contact of the top portion of the first protrusion 30 with the end surface of the outer member 16 is maintained. Even when the top portion of the first protrusion 30 is separated from the end surface of the outer member 16, the second protrusion 64 extends to maintain contact with the outer peripheral wall of the outer member 16. Moreover, the maintenance of these abutments is further facilitated by damping the annular protrusion 34 on the side wall of the annular groove 36.

すなわち、環状突出部28におけるアウタ部材16の端面に対向する側の端面に第2突起64を設ける場合であっても、継手用ブーツ60のシール機能を維持することが可能となる。   That is, even when the second protrusion 64 is provided on the end surface of the annular projecting portion 28 that faces the end surface of the outer member 16, the sealing function of the joint boot 60 can be maintained.

なお、上記した第2実施形態では、第2突起64をアウタ部材16の外周壁に当接させるようにしているが、図5に示すように、第1突起30と同心円状に第2突起66を設けた継手用ブーツ68を構成し、これら第1突起30及び第2突起66の双方をアウタ部材16の端面に当接させるようにしてもよい。   In the second embodiment described above, the second protrusion 64 is brought into contact with the outer peripheral wall of the outer member 16, but as shown in FIG. 5, the second protrusion 66 concentrically with the first protrusion 30. The joint boot 68 may be configured so that both the first protrusion 30 and the second protrusion 66 are brought into contact with the end surface of the outer member 16.

また、環状溝36に係合する環状凸部34を設けることは必須ではなく、大径筒部20の内部に第1突起30及び第2突起のみを設けるようにしてもよい。   In addition, it is not essential to provide the annular protrusion 34 that engages with the annular groove 36, and only the first protrusion 30 and the second protrusion may be provided inside the large-diameter cylindrical portion 20.

さらに、環状突出部28におけるアウタ部材16の端面に対向する側の端面に第1突起30及び第2突起66を設け、囲繞部62の内周壁にアウタ部材16の外周壁に当接する第3突起を設けるようにしてもよいことはいうまでもない。   Further, the first protrusion 30 and the second protrusion 66 are provided on the end face of the annular protrusion 28 opposite to the end face of the outer member 16, and the third protrusion is in contact with the outer peripheral wall of the outer member 16 on the inner peripheral wall of the surrounding part 62. Needless to say, it may be provided.

さらに、継手用ブーツ10、60、68が装着される等速ジョイントは、図1に示すトリポート型等速ジョイント14に限定されるものではなく、例えば、バーフィールド型等速ジョイント等、別種の等速ジョイントであってもよい。   Furthermore, the constant velocity joint to which the joint boots 10, 60, 68 are attached is not limited to the tripod type constant velocity joint 14 shown in FIG. It may be a fast joint.

第1実施形態に係る継手用ブーツが組み込まれた継手構造の要部概略斜視図である。It is a principal part schematic perspective view of the joint structure in which the boot for joints concerning 1st Embodiment was integrated. 図1の継手用ブーツを構成する大径筒部を拡大して示す要部拡大軸線方向断面図である。It is a principal part expansion axial direction sectional drawing which expands and shows the large diameter cylinder part which comprises the boot for couplings of FIG. 図2の大径筒部に等速ジョイントのアウタ部材を挿入した状態を拡大して示す要部拡大軸線方向断面図である。FIG. 3 is an enlarged sectional view in an enlarged axial direction of a main part showing a state where an outer member of a constant velocity joint is inserted into the large-diameter cylindrical part of FIG. 2. 第2実施形態に係る継手用ブーツを構成する大径筒部を拡大して示す要部拡大軸線方向断面図である。It is a principal part expansion axial direction sectional drawing which expands and shows the large diameter cylinder part which comprises the boots for joints concerning 2nd Embodiment. 第2実施形態の変形例に係る継手用ブーツを構成する大径筒部を拡大して示す要部拡大軸線方向断面図である。It is principal part expansion axial direction sectional drawing which expands and shows the large diameter cylinder part which comprises the joint boot which concerns on the modification of 2nd Embodiment.

符号の説明Explanation of symbols

10、60、68…継手用ブーツ 12…継手構造
14…トリポート型等速ジョイント 16…アウタ部材
18…伝達軸 20…大径筒部
22…小径筒部 24…蛇腹部
26、62…囲繞部 28…環状突出部
30…第1突起 34…環状凸部
36…環状溝 38、46…金属製バンド
42、64、66…第2突起
DESCRIPTION OF SYMBOLS 10, 60, 68 ... Joint boot 12 ... Joint structure 14 ... Triport type constant velocity joint 16 ... Outer member 18 ... Transmission shaft 20 ... Large diameter cylindrical part 22 ... Small diameter cylindrical part 24 ... Bellows part 26, 62 ... Surrounding part 28 ... annular protrusion 30 ... first protrusion 34 ... annular protrusion 36 ... annular groove 38, 46 ... metal bands 42, 64, 66 ... second protrusion

Claims (4)

等速ジョイントのアウタ部材が挿入される大径筒部と、軸部材が挿入される小径筒部と、前記大径筒部と前記小径筒部との間に介在して前記大径筒部から前記小径筒部に向かうに従って縮径する蛇腹部とを具備する継手用ブーツであって、
前記大径筒部は、前記アウタ部材の外周壁を囲繞する囲繞部と、前記囲繞部における前記小径筒部側に臨む端部に設けられて且つ前記アウタ部材の端面に対向する突出部とを備え、
前記突出部の一端面に、前記アウタ部材の前記端面に当接する第1突起が設けられ、
前記囲繞部の内周壁に、前記アウタ部材の前記外周壁に当接する第2突起が設けられ、
前記第2突起は、前記囲繞部の外周壁に締付部材が締め付けられることに伴って収縮することを特徴とする継手用ブーツ。
A large-diameter cylindrical portion into which the outer member of the constant velocity joint is inserted, a small-diameter cylindrical portion into which the shaft member is inserted, and the large-diameter cylindrical portion interposed between the large-diameter cylindrical portion and the small-diameter cylindrical portion. A joint boot comprising a bellows portion that decreases in diameter toward the small-diameter cylindrical portion,
The large-diameter cylindrical portion includes an enclosure portion that surrounds the outer peripheral wall of the outer member, and a protruding portion that is provided at an end portion of the enclosure portion that faces the small-diameter tubular portion side and faces the end surface of the outer member. Prepared,
A first protrusion that contacts the end surface of the outer member is provided on one end surface of the protrusion,
A second protrusion abutting on the outer peripheral wall of the outer member is provided on the inner peripheral wall of the surrounding portion;
The joint boot according to claim 1, wherein the second protrusion contracts as the tightening member is tightened to the outer peripheral wall of the surrounding portion.
請求項1記載の継手用ブーツにおいて、前記囲繞部の内周壁に環状凸部が設けられ、前記環状凸部は、前記アウタ部材の前記外周壁に設けられた環状溝に係合するとともに、前記第2突起に比して前記アウタ部材の前記端面から離間する側に配設されていることを特徴とする継手用ブーツ。   The joint boot according to claim 1, wherein an annular convex portion is provided on an inner peripheral wall of the surrounding portion, and the annular convex portion engages with an annular groove provided on the outer peripheral wall of the outer member, and A joint boot, characterized in that the joint boot is disposed on a side away from the end face of the outer member as compared to the second protrusion. 等速ジョイントのアウタ部材が挿入される大径筒部と、軸部材が挿入される小径筒部と、前記大径筒部と前記小径筒部との間に介在して前記大径筒部から前記小径筒部に向かうに従って縮径する蛇腹部とを具備する継手用ブーツであって、
前記大径筒部は、前記アウタ部材の外周壁を囲繞する囲繞部と、前記囲繞部における前記小径筒部側に臨む端部に設けられて且つ前記アウタ部材の端面に対向する突出部とを備え、
前記突出部の一端面に、前記アウタ部材の前記端面に当接する第1突起が設けられ、
前記突出部の前記一端面における前記第1突起よりも前記囲繞部に近接する側に、前記アウタ部材の前記端面又は前記外周壁のいずれかに当接する第2突起が設けられ、
前記第2突起は、前記囲繞部の外周壁に締付部材が締め付けられることに伴って収縮することを特徴とする継手用ブーツ。
A large-diameter cylindrical portion into which the outer member of the constant velocity joint is inserted, a small-diameter cylindrical portion into which the shaft member is inserted, and the large-diameter cylindrical portion interposed between the large-diameter cylindrical portion and the small-diameter cylindrical portion. A joint boot comprising a bellows portion that decreases in diameter toward the small-diameter cylindrical portion,
The large-diameter cylindrical portion includes an enclosure portion that surrounds the outer peripheral wall of the outer member, and a protruding portion that is provided at an end portion of the enclosure portion that faces the small-diameter tubular portion side and faces the end surface of the outer member. Prepared,
A first protrusion that contacts the end surface of the outer member is provided on one end surface of the protrusion,
A second protrusion that comes into contact with either the end face of the outer member or the outer peripheral wall is provided closer to the surrounding part than the first protrusion on the one end face of the protruding part,
The joint boot according to claim 1, wherein the second protrusion contracts as the tightening member is tightened to the outer peripheral wall of the surrounding portion.
請求項3記載の継手用ブーツにおいて、前記囲繞部の内周壁に環状凸部が設けられ、前記環状凸部は、アウタ部材の外周壁に設けられた環状溝に係合することを特徴とする継手用ブーツ。   4. The joint boot according to claim 3, wherein an annular convex portion is provided on an inner peripheral wall of the surrounding portion, and the annular convex portion engages with an annular groove provided on an outer peripheral wall of the outer member. Fitting boots.
JP2005377909A 2005-12-28 2005-12-28 Joint boot Pending JP2007177923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012172819A (en) * 2011-02-24 2012-09-10 Toyo Tire & Rubber Co Ltd Protective cover for air spring, and air spring fitted the same
CN103174764A (en) * 2013-03-26 2013-06-26 安徽江淮汽车股份有限公司 Seal structure of constant velocity universal joint dustproof cover
CN106493961A (en) * 2016-12-19 2017-03-15 海宁市力佳隆门窗密封条有限公司 The processing method of high leakproofness polypropylene seal bar and its sealing strip

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012172819A (en) * 2011-02-24 2012-09-10 Toyo Tire & Rubber Co Ltd Protective cover for air spring, and air spring fitted the same
CN103174764A (en) * 2013-03-26 2013-06-26 安徽江淮汽车股份有限公司 Seal structure of constant velocity universal joint dustproof cover
CN103174764B (en) * 2013-03-26 2015-05-20 安徽江淮汽车股份有限公司 Seal structure of constant velocity universal joint dustproof cover
CN106493961A (en) * 2016-12-19 2017-03-15 海宁市力佳隆门窗密封条有限公司 The processing method of high leakproofness polypropylene seal bar and its sealing strip
CN106493961B (en) * 2016-12-19 2019-04-23 海宁市力佳隆门窗密封条有限公司 The processing method and its sealing strip of high leakproofness polypropylene seal item

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