JP2005188637A - Boot for constant speed joint - Google Patents

Boot for constant speed joint Download PDF

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JP2005188637A
JP2005188637A JP2003430859A JP2003430859A JP2005188637A JP 2005188637 A JP2005188637 A JP 2005188637A JP 2003430859 A JP2003430859 A JP 2003430859A JP 2003430859 A JP2003430859 A JP 2003430859A JP 2005188637 A JP2005188637 A JP 2005188637A
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cylindrical portion
diameter cylindrical
constant velocity
small
protrusion
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JP4254531B2 (en
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Masayuki Chokai
真幸 鳥海
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a boot for a constant speed joint reducing an insertion load in attachment to a counterpart member, and allowing easy determination of whether or not attachment has been accurately carried out. <P>SOLUTION: The boot for a constant speed joint has a small diameter cylinder part held on a shaft, a large diameter cylinder part with a larger diameter than the small diameter cylinder part and coaxially arranged away from the small diameter cylinder part, and a bellows part integrally connecting the small diameter cylinder part and the large diameter cylinder part, and an inner circumferential surface of the large diameter cylinder part is attached so as to press against the counterpart member. A protrusion part protruding to an inner circumference side and engaging with a groove part of the counterpart member is provided on the large diameter cylinder part, and a groove opened to a side face and extending in a circumferential direction is provided on at least one part of the protrusion part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、前輪駆動車のドライブシャフト用ジョイントなどに不可欠な等速ジョイントに被覆され、等速ジョイントのジョイント部への水や埃の侵入を阻止するブーツに関する。   The present invention relates to a boot that is covered with a constant velocity joint that is indispensable for a drive shaft joint of a front-wheel drive vehicle and prevents entry of water and dust into the joint portion of the constant velocity joint.

等速ジョイントのジョイント部はグリースが封入された蛇腹形状のブーツで覆われ、このブーツで水や埃の侵入を阻止することによってジョイント部を保護し大角度で滑らかな回転が維持されている。この等速ジョイント用ブーツは、ジョイントアウターレースなどに保持される大径の大径筒部と、大径筒部より小径でシャフトに保持される小径筒部と、大径筒部と小径筒部を一体的に連結する略円錐台形状の蛇腹部とから構成されている。そして使用時には、ジョイントアウターレースなどとシャフトのなす角度（ジョイント角）の変化に応じて蛇腹部が変形するため、その角度が大きくなってもブーツによってジョイント部を確実にシールすることができる。   The joint portion of the constant velocity joint is covered with a bellows-shaped boot filled with grease. The boot protects the joint portion by preventing water and dust from entering, and maintains a smooth rotation at a large angle. This constant velocity joint boot has a large-diameter large-diameter cylindrical portion that is held by a joint outer race, a small-diameter cylindrical portion that is smaller than the large-diameter cylindrical portion and is held by the shaft, and a large-diameter cylindrical portion and a small-diameter cylindrical portion. And a substantially frustoconical bellows portion that integrally connect the two. In use, the bellows portion is deformed according to a change in the angle (joint angle) between the joint outer race and the shaft and the joint portion can be reliably sealed by the boot even when the angle increases.

ここで、大径筒部を相手部材に対応する位置に組み付けし、大径筒部の相手部材に対するシール性をより向上させるために、相手部材には大径筒部に当接する部分に溝部を設け、溝部と対応する大径筒部の内周表面には内周側に突出する突起部を設けることがなされている。この場合、相手部材を大径筒部の内周側に挿入すると突起部が溝部内部に入り込んで溝部と係合する。このため、等速ジョイント用ブーツと相手部材とが正しい位置で組付されるとともに、等速ジョイント用ブーツと相手部材とが互いに固定されて外れにくくなる。   Here, in order to assemble the large-diameter cylindrical portion at a position corresponding to the mating member and further improve the sealing performance of the large-diameter cylindrical portion with respect to the mating member, the mating member is provided with a groove portion in a portion that contacts the large-diameter cylindrical portion. Protruding portions protruding toward the inner peripheral side are provided on the inner peripheral surface of the large-diameter cylindrical portion corresponding to the groove portion. In this case, when the mating member is inserted into the inner peripheral side of the large-diameter cylindrical portion, the protruding portion enters the groove portion and engages with the groove portion. For this reason, the constant velocity joint boot and the mating member are assembled at a correct position, and the constant velocity joint boot and the mating member are fixed to each other and are not easily detached.

しかし一方で、突起部は内周側に突出していることから、相手部材を大径筒部の内周側に挿入する際には大径筒部に設けられた突起部が相手部材の溝部以外の部分である一般面と干渉するため、挿入する際に必要な荷重が過大になるために組付の作業性が悪くなる問題があった。   However, since the protruding portion protrudes toward the inner peripheral side, when the mating member is inserted into the inner circumferential side of the large diameter cylindrical portion, the protruding portion provided on the large diameter cylindrical portion is not the groove portion of the mating member. Since this interferes with the general surface, which is a part of the above, the load necessary for insertion becomes excessive, and there is a problem that the workability of the assembly is deteriorated.

ここで挿入時の荷重を軽減するために、大径筒部のうち突起部の外周側にスリット孔様のすぐりを設けた等速ジョイント用ブーツが開発されている（例えば、特許文献１）。特許文献１に示される等速ジョイント用ブーツによると、突起部が一般面に当接し突起部に荷重がかかるとすぐりが開いて突起部が変形する。このため、突起部の内周側に突出する量は小さくなり、挿入する際に必要な挿入荷重が軽減する。   Here, in order to reduce the load at the time of insertion, a constant velocity joint boot has been developed in which a slit hole-like curl is provided on the outer peripheral side of the protruding portion of the large-diameter cylindrical portion (for example, Patent Document 1). According to the constant velocity joint boot shown in Patent Document 1, when the protrusion comes into contact with the general surface and a load is applied to the protrusion, the curl is opened and the protrusion is deformed. For this reason, the amount which protrudes to the inner peripheral side of a projection part becomes small, and the insertion load required at the time of insertion reduces.

しかしこの特許文献１の等速ジョイント用ブーツを相手部材に組付する際には、正確な位置で組付されているか否か、すなわち、突起部が溝部に完全に入り込んでいるか否かの判断は、突起部が開いているか閉じているかを目視にて確認することでおこなう。しかし、すぐりがどの程度閉じているか、あるいはどの程度開いているかは目視にて判断し難く、正確な判断をおこなうためには作業者に熟練を要する問題があった。
特開平５−１４９４４８号公報 However, when the constant velocity joint boot of Patent Document 1 is assembled to the mating member, it is determined whether or not the constant velocity joint boot is assembled at an accurate position, that is, whether or not the protruding portion is completely inserted into the groove portion. Is performed by visually checking whether the protrusion is open or closed. However, it is difficult to visually determine how close the tick is or how much it is open, and there is a problem that requires an operator to make an accurate determination.
Japanese Patent Laid-Open No. 5-149448

本発明は上記事情を考慮してなされたもので、相手部材に組み付ける際の挿入荷重を軽減するとともに、正確に組付が為されているか否かを容易に判断できる等速ジョイント用ブーツを提供することを目的とする。   The present invention has been made in consideration of the above circumstances, and provides a constant velocity joint boot that can reduce the insertion load when assembled to a mating member and can easily determine whether or not the assembly is accurately performed. The purpose is to do.

前記課題を解決する本発明の等速ジョイント用ブーツは、シャフトに保持される小径筒部と、小径筒部より大径であり小径筒部と離間して同軸的に配置される大径筒部と、小径筒部と大径筒部を一体的に連結する蛇腹部とを持ち、大形筒部の内周表面が相手部材に圧接するように組付される等速ジョイント用ブーツであって、
上記大径筒部は内周側に突出し相手部材の溝部と係合する突起部を持ち、突起部の少なくとも一部には側面に開口し周方向に延びるすぐりが設けられていることを特徴とする。 The constant velocity joint boot of the present invention that solves the above problems includes a small-diameter cylindrical portion that is held by a shaft, and a large-diameter cylindrical portion that is larger in diameter than the small-diameter cylindrical portion and is coaxially disposed apart from the small-diameter cylindrical portion. And a constant velocity joint boot that has a bellows portion that integrally connects the small diameter cylindrical portion and the large diameter cylindrical portion, and is assembled so that the inner peripheral surface of the large cylindrical portion is pressed against the mating member. ,
The large-diameter cylindrical portion has a protruding portion that protrudes toward the inner peripheral side and engages with the groove portion of the mating member, and at least a part of the protruding portion is provided with a tick that opens on the side surface and extends in the circumferential direction. To do.

また、上記すぐりは上記突起部のうち上記小径筒部側の側面に開口していることが好ましい。   Moreover, it is preferable that the said curl is opened in the side surface by the side of the said small diameter cylinder part among the said projection parts.

上記大形筒部は周方向の内周側に部分的に突出する厚肉部と厚肉部を連結する薄肉部とからなる筒状の成形体と、成形体の外周を被覆する上記蛇腹部の大径端部とからなり、上記突起部は薄肉部の少なくとも一部に設けられていることが好ましい。   The large cylindrical part is a cylindrical molded body composed of a thick part partially projecting toward the inner peripheral side in the circumferential direction and a thin part connecting the thick part, and the bellows part covering the outer periphery of the molded body It is preferable that the protrusion is provided on at least a part of the thin portion.

本発明の等速ジョイント用ブーツによると、相手部材の溝部に係合する突起部が大径筒部の内周側に設けられていることで、等速ジョイント用ブーツの大径筒部と相手部材との組付を確実な位置でおこなうことができる。   According to the constant velocity joint boot of the present invention, the protrusion that engages with the groove of the counterpart member is provided on the inner peripheral side of the large diameter cylindrical portion, so that the large diameter cylindrical portion of the constant velocity joint boot and the counterpart Assembly with the member can be performed at a certain position.

また、本発明の等速ジョイント用ブーツにおいて、突起部の少なくとも一部には、側面に開口し周方向に延びるすぐりが設けられている。ここで、側面とは突起部のうち小径筒部側の面や、小径筒部と反対側の面を指す。突起部の少なくとも一部に、側面に開口し周方向に延びるすぐりが設けられていることで、大径筒部に相手部材を挿入する際に突起部が相手部材の一般面に当接すると、突起部が一般面に押圧されてすぐりが閉じ、突起部が圧縮される。このため、挿入荷重が低減されて挿入が容易におこなわれる。突起部が溝部内部に挿入されると、突起部にかかる押圧力は小さくなり、すぐりが再度開くため、突起部は溝部と係合する。このとき突起部の弾性によって、突起部のうちすぐりよりも内周側の部分が溝部の内側面に打ち付けられる。打ち付けられたことは感触あるいは音によって容易に確認できるため、作業者は大径筒部と相手部材とが正しい位置に完全に組み付けられたことを容易に知覚することができる。   Further, in the constant velocity joint boot of the present invention, at least a part of the protrusion is provided with a tick that opens in the side surface and extends in the circumferential direction. Here, the side surface refers to the surface on the side of the small-diameter cylindrical portion or the surface on the side opposite to the small-diameter cylindrical portion of the protrusion. When at least a part of the protrusion is provided with a tick that opens on the side surface and extends in the circumferential direction, when the protrusion is in contact with the general surface of the counterpart member when the counterpart member is inserted into the large-diameter cylindrical portion, The protrusion is pressed against the general surface, the curb is closed, and the protrusion is compressed. For this reason, insertion load is reduced and insertion is performed easily. When the protruding portion is inserted into the groove portion, the pressing force applied to the protruding portion is reduced, and the tickling is reopened, so that the protruding portion engages with the groove portion. At this time, due to the elasticity of the protruding portion, a portion of the protruding portion on the inner peripheral side with respect to the straight portion is hit against the inner side surface of the groove portion. Since it can be easily confirmed by touch or sound, the operator can easily perceive that the large-diameter cylindrical portion and the mating member are completely assembled at the correct positions.

さらに、すぐりが側面に開口していることで、大径部材を相手部材挿入する際の挿入荷重がより確実に低減される。さらに、この場合には、蛇腹部内部に保持されているグリースが漏出して大径筒部と相手部材との間隙に進入する際にすぐりが溝部内で開くために突起部によるシール性が増す。そして、すぐり内に入り込んだグリースの進行はすぐりの奥側で止まるため、グリース漏れの進行が防止される。   Furthermore, since the curl is open on the side surface, the insertion load when inserting the large-diameter member into the mating member is more reliably reduced. Further, in this case, since the grease held inside the bellows portion leaks and enters the gap between the large-diameter cylindrical portion and the counterpart member, the curls are opened in the groove portion, so that the sealing performance by the protruding portion is increased. . And since the progress of the grease that has entered the curb stops at the far side of the curb, the progress of grease leakage is prevented.

本発明に係る等速ジョイント用ブーツにおいて、突起部以外の部分は既知の方法で既知の形状に形成したものでよい。例えば、射出ブロー成形等の方法により大径筒部や小径筒部と蛇腹部とを一体に形成したものでも良いし、少なくとも一部を別体で形成してその他の部分と組み付けて一体化したものでも良い。例えば、小形筒部と蛇腹部の一部とを射出ブロー成形で形成し、別に射出成形で筒状の成形体を形成した上で、筒状の成形体の外周を蛇腹部のうち小径筒部と反対側の端部である大径端部で被覆するように組付て一体化することもできる。この場合には、蛇腹部の大径端部と筒状の成形体とで大径筒部が構成される。   In the constant velocity joint boot according to the present invention, portions other than the protrusions may be formed in a known shape by a known method. For example, the large-diameter cylinder part or the small-diameter cylinder part and the bellows part may be integrally formed by a method such as injection blow molding, or at least a part is formed separately and integrated with other parts. Things can be used. For example, after forming a small cylindrical part and a part of the bellows part by injection blow molding and separately forming a cylindrical molded body by injection molding, the outer periphery of the cylindrical molded body is the small diameter cylindrical part of the bellows part It can also be assembled and integrated so as to cover with a large-diameter end that is the end opposite to the end. In this case, the large-diameter cylindrical portion is constituted by the large-diameter end portion of the bellows portion and the cylindrical molded body.

また、大径筒部の形状は相手部材の形状に対応する形状であれば良く、肉厚が略均一な筒状であっても良いし、部分的に肉厚差を持つような形状であっても良い。等速ジョイント用ブーツの大径筒部と締結される相手部材の締結部は、例えばトリポード型ジョイント等では非円形の外周形状を有する。したがってこの場合には、大径筒部はジョイント内への水や埃の侵入を確実に防止する十分なシール性能を付与するため、相手部材の締結部の形状に対応した形状、つまり、周方向の内周側に部分的に突出する厚肉部を持つ形状に形成される。   The shape of the large-diameter cylindrical portion may be a shape corresponding to the shape of the mating member, may be a cylindrical shape with a substantially uniform thickness, or a shape that has a partial thickness difference. May be. The fastening portion of the mating member fastened to the large-diameter cylindrical portion of the constant velocity joint boot has a non-circular outer peripheral shape in a tripod type joint, for example. Therefore, in this case, the large-diameter cylindrical portion provides a sufficient sealing performance to reliably prevent water and dust from entering the joint, so that the shape corresponding to the shape of the fastening portion of the mating member, that is, the circumferential direction It is formed in a shape having a thick portion that partially protrudes on the inner peripheral side of the.

さらに、等速ジョイント用ブーツを構成する材料としては、耐候性や耐疲労性に優れた既知の材料を用いることができ、例えば熱可塑性エラストマー等の材料を好ましく用いることができる。   Furthermore, as a material constituting the constant velocity joint boot, a known material excellent in weather resistance and fatigue resistance can be used. For example, a material such as a thermoplastic elastomer can be preferably used.

突起部は、大径筒部の内周側に突出し、相手部材に設けられた溝部と係合する形状に形成される。突起部の大きさや配置位置等は、相手部材の形状や所望するシール性能等に応じて適宜設定することができ、例えば大径筒部の内周表面の全周に設けることもできるし一部のみに設けることもできる。なお、上述したトリポード型ジョイント等が相手部材である場合には、相手部材の溝部は成形性を考慮して非円形の外周のうち***している面（凸面）に設けられることが多い。この場合、突起部は相手部材の凸面に対応する部分である薄肉部にのみ設けられる。   The protruding portion protrudes to the inner peripheral side of the large-diameter cylindrical portion, and is formed in a shape that engages with a groove portion provided in the counterpart member. The size and arrangement position of the protrusion can be appropriately set according to the shape of the mating member, the desired sealing performance, etc., for example, it can be provided on the entire circumference of the inner peripheral surface of the large-diameter cylindrical portion, or a part thereof It can also be provided only. When the above-described tripod type joint or the like is a mating member, the groove portion of the mating member is often provided on a raised surface (convex surface) of the noncircular outer periphery in consideration of formability. In this case, the protrusion is provided only on the thin portion that is a portion corresponding to the convex surface of the counterpart member.

本発明の等速ジョイント用ブーツにおいては、突起部の少なくとも一部に、側面に開口し周方向に延びるすぐりが設けられている。このすぐりは、突起部のうち小径筒部側の側面に開口するものであっても良いし、小径筒部と反対側の側面に開口するものであっても良い。しかし、一般に相手部材は等速ジョイント用ブーツの大径筒部側から挿入されて組付されるため、すぐりは小径筒部側の側面に開口する方が好ましい。すぐりが小径筒部と反対側の側面に開口する場合には、組付時にすぐりが開き挿入荷重が増大する場合があるからである。また、等速ジョイント用ブーツの使用期間や使用状態等によっては、蛇腹部内部に保持されているグリースが漏出して大径筒部と相手部材との間隙に侵入する場合があるが、すぐりが小径筒部側の側面に開口している場合には、溝部内部に侵入したグリースがすぐり内に入り込み、すぐりが溝部内で開く。すぐりが溝部内で開くことで突起部によるシール性が増す。また、すぐり内に入り込んだグリースの進行はすぐりの奥側で止まるため、グリース漏れの進行が防止される。また、すぐりが溝部内で開くことにより、突起部のうち小径筒部側の部分が拡径するために突起部が挿入方向と反対方向に抜けることがより確実に防止される。なお、このすぐりは、突起部の周方向の一部にのみ設けても良いし、突起部の周方向の全長に設けても良い。また、突起部の周方向に断続的に設けても良い。さらに、すぐりは射出成形により成形体を形成する際に成形型で同時に形成しても良いし、あるいは切削等の後加工により形成しても良い。   In the constant velocity joint boot of the present invention, at least a part of the protrusion is provided with a tick that opens in the side surface and extends in the circumferential direction. This tickling may be one that opens on the side surface of the protruding portion on the side of the small diameter cylindrical portion, or may be one that opens on the side surface on the opposite side of the small diameter cylindrical portion. However, in general, since the mating member is inserted and assembled from the large-diameter cylindrical portion side of the constant velocity joint boot, it is preferable that the counter member be opened on the side surface on the small-diameter cylindrical portion side. This is because if the curl opens on the side surface opposite to the small-diameter cylindrical portion, the curl may open during assembly and the insertion load may increase. In addition, depending on the usage period and usage state of the constant velocity joint boot, the grease held inside the bellows part may leak and enter the gap between the large diameter cylindrical part and the mating member. In the case of opening on the side surface on the small-diameter cylinder portion side, the grease that has entered the groove portion enters the inside of the groove, and the edge opens in the groove portion. As the curl opens in the groove, the sealing performance by the protrusion increases. Moreover, since the progress of the grease that has entered the curb stops at the far side of the curb, the progress of grease leakage is prevented. Further, when the curl is opened in the groove portion, the portion on the small-diameter cylindrical portion side of the protrusion portion is expanded in diameter, so that the protrusion portion is more reliably prevented from coming off in the direction opposite to the insertion direction. This tickling may be provided only on a part of the protrusion in the circumferential direction or on the entire length of the protrusion in the circumferential direction. Moreover, you may provide intermittently in the circumferential direction of a projection part. Further, the currant may be formed simultaneously with a molding die when forming a molded body by injection molding, or may be formed by post-processing such as cutting.

以下、本発明の等速ジョイント用ブーツを図面を基に説明する。 The constant velocity joint boot of the present invention will be described below with reference to the drawings.

（実施例１）
本実施例１の等速ジョイント用ブーツの軸方向の模式断面図を図１に示す。 (Example 1)
A schematic cross-sectional view of the constant velocity joint boot of Example 1 in the axial direction is shown in FIG.

本実施例１の等速ジョイント用ブーツ１は、大径筒部２が、筒状の成形体３とこの成形体３の外周を被覆する蛇腹部５の大径端部６とから構成されるものである。成形体３はゴム、ＴＰＯもしくはＴＰＥを材料として射出成形で形成されたものである。また、蛇腹部５および小径筒部７はＴＰＥを材料として射出ブロー成形で一体に形成されたものである。成形体３の外周面には、周方向の全周に溝状の凹帯１０が設けられている。また、大径端部６のうち内周面には凹帯１０と対応する位置に突起状の凸帯１２が設けられている。成形体３の外周に大径端部６を被覆すると、蛇腹部５の凸帯１２が成形体３の凹帯１０に入り込んで固定される。   In the constant velocity joint boot 1 according to the first embodiment, the large-diameter cylindrical portion 2 includes a cylindrical molded body 3 and a large-diameter end portion 6 of the bellows portion 5 that covers the outer periphery of the molded body 3. Is. The molded body 3 is formed by injection molding using rubber, TPO or TPE as a material. The bellows portion 5 and the small-diameter cylindrical portion 7 are integrally formed by injection blow molding using TPE as a material. On the outer peripheral surface of the molded body 3, groove-shaped concave bands 10 are provided on the entire circumference in the circumferential direction. In addition, a protruding convex band 12 is provided on the inner peripheral surface of the large-diameter end portion 6 at a position corresponding to the concave band 10. When the outer periphery of the molded body 3 is covered with the large-diameter end 6, the convex band 12 of the bellows part 5 enters the concave band 10 of the molded body 3 and is fixed.

本実施例の等速ジョイント用ブーツ１が組付される相手部材１３は、図２に示すように、締結部１５の外周表面が非円形状になっている。このため、成形体３は周方向の内周側に部分的に突出する厚肉部１６と、厚肉部１６を連結する薄肉部１７とから構成される。また、相手部材１３の溝部１８は、締結部１５のうち凸面２０に設けられている。したがって、本実施例の等速ジョイント用ブーツ１では、突起部２１は成形体３のうち薄肉部１７に設けられる。なお、本実施例においては突起部２１は薄肉部１７のうち周方向の全長に設けられている。   In the mating member 13 to which the constant velocity joint boot 1 of the present embodiment is assembled, the outer peripheral surface of the fastening portion 15 is non-circular as shown in FIG. For this reason, the molded body 3 includes a thick portion 16 that partially protrudes toward the inner peripheral side in the circumferential direction, and a thin portion 17 that connects the thick portion 16. Further, the groove portion 18 of the mating member 13 is provided on the convex surface 20 of the fastening portion 15. Therefore, in the constant velocity joint boot 1 of the present embodiment, the protrusion 21 is provided in the thin portion 17 of the molded body 3. In the present embodiment, the protruding portion 21 is provided on the entire length of the thin portion 17 in the circumferential direction.

また、突起部２１の内周側面および突起部２１の軸方向の両側には、突起状のシールリブ２２が設けられいている。このシールリブ２２は厚肉部１６にも延び、成形体３の内周面の全周に連続して設けられている。シールリブ２２は、蛇腹部５の内部に保持されているグリースが大径筒部２と相手部材１３との間隙から漏出することを防止するための部分である。シールリブ２２は、突起部２１よりも狭幅かつ突起部２１よりも突起高さが小さく形成されており、相手部材１３の表面に当接すると相手部材１３の表面形状に対応した形状に容易に変形して大径筒部２と相手部材１３との間隙をシールするようになっている。   Further, projecting seal ribs 22 are provided on the inner peripheral side surface of the projecting portion 21 and on both sides in the axial direction of the projecting portion 21. The seal rib 22 also extends to the thick portion 16 and is continuously provided on the entire circumference of the inner peripheral surface of the molded body 3. The seal rib 22 is a portion for preventing the grease held in the bellows portion 5 from leaking from the gap between the large-diameter cylindrical portion 2 and the counterpart member 13. The seal rib 22 has a narrower width than the protrusion 21 and a protrusion height smaller than that of the protrusion 21. When the seal rib 22 abuts on the surface of the counterpart member 13, it easily deforms into a shape corresponding to the surface shape of the counterpart member 13. Thus, the gap between the large-diameter cylindrical portion 2 and the counterpart member 13 is sealed.

突起部２１の突出高さ方向の略中央部分には、周方向の全長に延びるすぐり２３が設けられている。このすぐり２３は、図３に示されるように、突起部２１のうち小径筒部７側の側面２５に開口し、小径筒部７側の側面と反対側の面２６方向に軸方向に延びている。   A curb 23 extending the entire length in the circumferential direction is provided at a substantially central portion of the protruding portion 21 in the protruding height direction. As shown in FIG. 3, the tickling 23 opens on the side surface 25 on the small diameter cylindrical portion 7 side of the protrusion 21, and extends in the axial direction in the direction of the surface 26 opposite to the side surface on the small diameter cylindrical portion 7 side. Yes.

本実施例１の等速ジョイント用ブーツ１は相手部材１３に対して以下のように組み付けられる。   The constant velocity joint boot 1 according to the first embodiment is assembled to the mating member 13 as follows.

先ず、図３に示すように相手部材１３が等速ジョイント用ブーツ１の大径筒部２側から挿入される。突起部２１が相手部材１３の一般面２７に当接する位置にまで相手部材１３が挿入されると、図４に示すように、大径筒部２が拡径するとともに突起部２１が相手部材１３の一般面２７に圧接されてすぐり２３が閉じ、突起部２１の突出高さが小さくなる。このため、挿入荷重が小さくなり、相手部材１３の挿入が容易となる。そして、相手部材１３がさらに挿入され、突起部２１が一般面２７をこえて溝部１８に到達すると、突起部２１は溝部１８内部に入り込む。このとき、突起部２１にかかる押圧力は小さくなるため、突起部２１はその弾性によりもとの形状に戻ろうとする。したがって、図５に示すように、すぐり２３が再度開いて突起部２１が溝部１８と係合する。このとき、突起部２１のうちすぐり２３よりも内周側の部分２８は、突起部２１の弾性によって溝部１８の内側面に打ち付けられる。したがって、突起部２１と溝部１８とが係合し大径筒部２と相手部材１３とが正しい位置に組付されたことは音や感触等によって容易に確認できる。 大径筒部２と相手部材１３との組付が完了すると、大径端部７の外周をリング状の締結具３０で締結する。以上の操作で等速ジョイント用ブーツ１と相手部材１３とが組み付けられる。   First, as shown in FIG. 3, the mating member 13 is inserted from the large-diameter cylindrical portion 2 side of the constant velocity joint boot 1. When the mating member 13 is inserted to a position where the projecting portion 21 comes into contact with the general surface 27 of the mating member 13, as shown in FIG. The contact surface 23 is pressed against the general surface 27 to close the edge 23, and the protruding height of the protrusion 21 is reduced. For this reason, insertion load becomes small and insertion of the other member 13 becomes easy. Then, when the mating member 13 is further inserted and the protrusion 21 reaches the groove 18 beyond the general surface 27, the protrusion 21 enters the groove 18. At this time, since the pressing force applied to the protrusion 21 is reduced, the protrusion 21 tends to return to its original shape due to its elasticity. Therefore, as shown in FIG. 5, the tickling 23 is opened again, and the protrusion 21 is engaged with the groove 18. At this time, the portion 28 on the inner peripheral side of the straight portion 23 of the protrusion 21 is hit against the inner surface of the groove 18 by the elasticity of the protrusion 21. Therefore, it can be easily confirmed by sound or touch that the protrusion 21 and the groove 18 are engaged and the large-diameter cylindrical portion 2 and the mating member 13 are assembled at the correct positions. When the assembly of the large diameter cylindrical portion 2 and the mating member 13 is completed, the outer periphery of the large diameter end portion 7 is fastened with a ring-shaped fastener 30. The constant velocity joint boot 1 and the mating member 13 are assembled by the above operation.

本実施例の等速ジョイント用ブーツ１では、突起部２１にすぐり２３が設けられていることで、相手部材１３に組み付ける際の挿入荷重が低減され、組付作業を容易におこなうことができる。   In the constant velocity joint boot 1 of the present embodiment, since the protrusions 21 are provided with the straights 23, the insertion load when assembled to the counterpart member 13 is reduced, and the assembling work can be easily performed.

そして、大径筒部２と相手部材３とが正しい位置に組付されたことが音や感触によって容易に確認できるため、正確に組付が為されているか否かが容易に判断できる。   Since it can be easily confirmed by sound and touch that the large-diameter cylindrical portion 2 and the mating member 3 are assembled at the correct position, it can be easily determined whether or not the assembly is correctly performed.

また、すぐり２３が小径筒部７側の側面に開口しているため、組付時にすぐり２３が開くこともなく、挿入荷重は確実に低減される。さらに、すぐり２３が小径筒部７側の側面に開口しているため、蛇腹部５に保持されているグリースが漏出し溝部１８内部に侵入する場合にも、グリースがすぐり２３内に入り込んですぐり２３が溝部１８内で開くために、突起部２１によるシール性が増すとともに、グリースが大径筒部方向にさらに進むことが抑制されてグリース漏れの進行が抑えられる。さらに、すぐり２３が溝部１８内で開くために、突起部２１が挿入方向と反対方向に抜けることがより確実に防止される。なお、例えば図６に示すように、溝部１８の形状を小径筒部７側が深くなるように形成するとともにすぐり２３がより大きく開くように形成する場合には、グリース漏れが生じた際の突起部２１によるシール性がさらに高まるとともに、突起部２１の突起部２１が挿入方向と反対方向に抜けることがさらに確実に防止される。   Moreover, since the curl 23 is opened on the side surface on the small diameter cylindrical part 7 side, the curl 23 does not open during assembly, and the insertion load is reliably reduced. Further, since the curl 23 is open on the side surface on the small diameter cylindrical part 7 side, even when the grease held in the bellows part 5 enters the leaking groove part 18, the grease enters the curb 23 and is Since 23 opens in the groove part 18, the sealing performance by the projection part 21 is increased, and the further progress of the grease in the direction of the large-diameter cylinder part is suppressed, and the progress of grease leakage is suppressed. Furthermore, since the curl 23 opens in the groove part 18, the protrusion part 21 is more reliably prevented from coming off in the direction opposite to the insertion direction. For example, as shown in FIG. 6, when the groove portion 18 is formed so that the small-diameter cylindrical portion 7 side is deeper and the straight portion 23 is opened more widely, the protruding portion when grease leakage occurs is formed. The sealing performance by 21 is further enhanced, and the protrusion 21 of the protrusion 21 is further reliably prevented from coming off in the direction opposite to the insertion direction.

さらに、本実施例ではすぐり２３は図３に示されるように大径筒部２の軸方向に延びるように設けたが、例えば、図７に示されるように大径筒部２の外周側に向けて傾斜しつつ延びる形状にしても良いし、図８に示されるように大径筒部２の内周側に向けて傾斜しつつ延びる形状にしても良い。外周側に向けて延びる形状にする場合には基部３１が比較的厚肉になり、打ち付けられる際の感触や音が大きくなるために組付作業時に大径筒部２が正しい位置に確実に組み付けられているか否かをより容易に判断することができる。また、内周側に向けて延びる形状にする場合には、すぐり２３が開く際の蝶番となる基部３１が比較的薄肉になるため、すぐり２３が閉じ易く組付時の挿入荷重がより軽減される。   Further, in the present embodiment, the curl 23 is provided so as to extend in the axial direction of the large-diameter cylindrical portion 2 as shown in FIG. 3, but for example, on the outer peripheral side of the large-diameter cylindrical portion 2 as shown in FIG. It may have a shape that extends while inclining, or may have a shape that extends while inclining toward the inner peripheral side of the large-diameter cylindrical portion 2 as shown in FIG. In the case of a shape extending toward the outer peripheral side, the base 31 is relatively thick, and the feel and sound when driven are increased, so that the large-diameter cylindrical portion 2 is securely assembled at the correct position during assembly work. It is possible to more easily determine whether or not Further, in the case of the shape extending toward the inner peripheral side, the base 31 that becomes a hinge when the curling 23 is opened becomes relatively thin, so that the curling 23 can be easily closed and the insertion load at the time of assembly is further reduced. The

実施例１の等速ジョイント用ブーツの断面を模式的に表す図である。1 is a diagram schematically illustrating a cross section of a constant velocity joint boot of Example 1. FIG. 実施例１の等速ジョイント用ブーツの成形体と相手部材とを模式的に表す図である。It is a figure which represents typically the molded object and the other party member of the boot for constant velocity joints of Example 1. FIG. 大径筒部が相手部材に組付される様子を模式的に表す図である。It is a figure which represents typically a mode that a large diameter cylinder part is assembled | attached to the other member. 大径筒部が相手部材に組付される様子を模式的に表す図である。It is a figure which represents typically a mode that a large diameter cylinder part is assembled | attached to the other member. 大径筒部が相手部材に組付される様子を模式的に表す図である。It is a figure which represents typically a mode that a large diameter cylinder part is assembled | attached to the other member. その他の形状の突起部を模式的に表す断面図である。It is sectional drawing which represents typically the projection part of another shape. その他の形状の突起部を模式的に表す断面図である。It is sectional drawing which represents typically the projection part of another shape. その他の形状の突起部を模式的に表す断面図である。It is sectional drawing which represents typically the projection part of another shape.

符号の説明Explanation of symbols

１：等速ジョイント用ブーツ ２：大径筒部 ３：成形体 ５：蛇腹部 ６：大径端部 ７：小径筒部 １３：相手部材 １６：厚肉部 １７：薄肉部 １８：溝部 ２１：突起部 ２３：すぐり ２５：側面 1: boot for constant velocity joint 2: large diameter cylindrical portion 3: molded body 5: bellows portion 6: large diameter end portion 7: small diameter cylindrical portion 13: mating member 16: thick portion 17: thin portion 18: groove portion 21: Projection 23: Straight 25: Side

Claims (3)

シャフトに保持される小径筒部と、該小径筒部より大径であり該小径筒部と離間して同軸的に配置される大径筒部と、該小径筒部と該大径筒部を一体的に連結する蛇腹部とを持ち、該大形筒部の内周表面が相手部材に圧接するように組付される等速ジョイント用ブーツであって、
前記大径筒部は内周側に突出し相手部材の溝部と係合する突起部を持ち、該突起部の少なくとも一部には側面に開口し周方向に延びるすぐりが設けられていることを特徴とする等速ジョイント用ブーツ。 A small-diameter cylindrical portion held by a shaft, a large-diameter cylindrical portion that is larger in diameter than the small-diameter cylindrical portion and is arranged coaxially apart from the small-diameter cylindrical portion, the small-diameter cylindrical portion, and the large-diameter cylindrical portion. A constant velocity joint boot that has a bellows part that is integrally connected, and is assembled so that the inner peripheral surface of the large cylindrical part is pressed against a mating member;
The large-diameter cylindrical portion has a protruding portion that protrudes toward the inner peripheral side and engages with a groove portion of a mating member, and at least a part of the protruding portion is provided with a tick that opens on a side surface and extends in the circumferential direction. Boots for constant velocity joints. 前記すぐりは前記突起部のうち前記小径筒部側の側面に開口している請求項１に記載の等速ジョイント用ブーツ。   2. The constant velocity joint boot according to claim 1, wherein the tickling is open on a side surface of the protruding portion on the side of the small diameter cylindrical portion. 前記大形筒部は周方向の内周側に部分的に突出する厚肉部と該厚肉部を連結する薄肉部とからなる筒状の成形体と、該成形体の外周を被覆する前記蛇腹部の大径端部とからなり、前記突起部は該薄肉部の少なくとも一部に設けられている請求項１に記載の等速ジョイント用ブーツ。   The large cylindrical portion is a cylindrical molded body composed of a thick portion that partially protrudes toward the inner circumferential side in the circumferential direction and a thin portion that connects the thick portion, and the outer periphery of the molded body is covered with the cylindrical portion. 2. The constant velocity joint boot according to claim 1, comprising a large-diameter end portion of a bellows portion, wherein the protrusion is provided on at least a part of the thin portion.
JP2003430859A 2003-12-25 2003-12-25 Constant velocity joint boots Expired - Fee Related JP4254531B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009034803A1 (en) * 2007-09-10 2009-03-19 Ntn Corporation Constant velocity universal joint
JP2009156409A (en) * 2007-12-27 2009-07-16 Fukoku Co Ltd Boot for constant velocity universal joint
WO2010064690A1 (en) * 2008-12-04 2010-06-10 株式会社フコク Seal structure
JP2019143717A (en) * 2018-02-21 2019-08-29 Ｔｏｙｏ Ｔｉｒｅ株式会社 Boot

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US10648054B2 (en) 2014-09-08 2020-05-12 Jfe Steel Corporation Method and facility for producing high-strength galavanized steel sheets

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009034803A1 (en) * 2007-09-10 2009-03-19 Ntn Corporation Constant velocity universal joint
JP2009068510A (en) * 2007-09-10 2009-04-02 Ntn Corp Constant velocity universal joint
US8328650B2 (en) 2007-09-10 2012-12-11 Ntn Corporation Constant velocity universal joint
JP2009156409A (en) * 2007-12-27 2009-07-16 Fukoku Co Ltd Boot for constant velocity universal joint
WO2010064690A1 (en) * 2008-12-04 2010-06-10 株式会社フコク Seal structure
JP2010133487A (en) * 2008-12-04 2010-06-17 Fukoku Co Ltd Sealing structure
JP2019143717A (en) * 2018-02-21 2019-08-29 Ｔｏｙｏ Ｔｉｒｅ株式会社 Boot
JP7133321B2 (en) 2018-02-21 2022-09-08 Ｔｏｙｏ Ｔｉｒｅ株式会社 boots

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