JP2008291912A - Shaft coupling structure and boot for shaft coupling - Google Patents

Shaft coupling structure and boot for shaft coupling Download PDF

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Publication number
JP2008291912A
JP2008291912A JP2007137776A JP2007137776A JP2008291912A JP 2008291912 A JP2008291912 A JP 2008291912A JP 2007137776 A JP2007137776 A JP 2007137776A JP 2007137776 A JP2007137776 A JP 2007137776A JP 2008291912 A JP2008291912 A JP 2008291912A
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Prior art keywords
shaft
boot
bellows portion
shaft coupling
conical
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JP2007137776A
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Japanese (ja)
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Takeo Yamamoto
武郎 山本
Fumitaka Kato
文隆 加藤
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2007137776A priority Critical patent/JP2008291912A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
    • F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
    • F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
    • F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact shaft coupling structure capable of smooth telescopic motion of a shaft member, and a boot for a shaft coupling. <P>SOLUTION: This shaft coupling comprises a shaft 1, an outer race 2A with an opening for receiving the shaft 1 in a manner of variable insertion amount, and a boot 3 fixed to the shaft 1 and the outer race 2A for sealing a space including the opening. The boot 3 has a cylindrical bellows part 10 positioned on an outer periphery of the outer race 2A, a conical bellows part 20 positioned between the outer race 2A and the shaft 1, a small-diameter ring part 30 fixed on an outer periphery of the shaft 1, and a projection part 40 installed on an inner face of the boot 30 positioned between the cylindrical bellows part 10 and the conical bellows part 20 and projecting toward an axial end face of the outer race 2A. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、軸継手構造および軸継手用ブーツに関し、特に、第１と第２の軸部材を繋ぐ軸継手構造および該継手構造に用いられる軸継手用ブーツに関する。   The present invention relates to a shaft joint structure and a shaft joint boot, and more particularly, to a shaft joint structure connecting a first shaft member and a second shaft member and a shaft joint boot used in the joint structure.

従来から、一方の軸部材が他方の軸部材の先端に設けられた開口内に挿入量可変に受け入れられる軸継手構造において、軸部材の結合部分からの潤滑材の漏れや軸部材の結合部分への異物の進入を抑制するために、当該結合部分を密閉する略円錐形のブーツが設けられている。ブーツには、軸部材の伸縮に対応するため、蛇腹部が設けられている。このようなブーツは、たとえば、実開昭６２−１７４１２１号公報（特許文献１）、実公平２−４７７６５号公報（特許文献２）、特開平８−２１０５１４号公報（特許文献３）、特開２００５−１５５８８６号公報（特許文献４）および特開２００６−８４００８号公報（特許文献５）などに記載されている。
実開昭６２−１７４１２１号公報 実公平２−４７７６５号公報 特開平８−２１０５１４号公報 特開２００５−１５５８８６号公報 特開２００６−８４００８号公報 Conventionally, in a shaft coupling structure in which one shaft member is variably received in an opening provided at the tip of the other shaft member, the leakage of lubricant from the coupling portion of the shaft member or the coupling portion of the shaft member In order to suppress the entry of foreign matter, a substantially conical boot that seals the joint portion is provided. The boot is provided with a bellows portion to accommodate expansion and contraction of the shaft member. Such boots are disclosed in, for example, Japanese Utility Model Publication No. 62-174121 (Patent Document 1), Japanese Utility Model Publication No. 2-47765 (Patent Document 2), Japanese Patent Application Laid-Open No. 8-210514 (Patent Document 3), JP-A-2005-155886 (Patent Document 4) and JP-A-2006-84008 (Patent Document 5).
Japanese Utility Model Publication No. 62-174121 Japanese Utility Model Publication No. 2-47765 JP-A-8-210514 JP 2005-155886 A JP 2006-84008 A

上記のような軸継手構造において、一方の軸部材が他方の軸部材の開口の奥側にスライドすると、ブーツにより密閉された空間の容積が圧縮され、該空間の圧力が高くなる。この結果、スライドに必要な荷重が増大する。   In the shaft coupling structure as described above, when one shaft member slides to the back side of the opening of the other shaft member, the volume of the space sealed by the boot is compressed, and the pressure in the space increases. As a result, the load required for the slide increases.

また、上記とは異なる観点では、軸部材のスライド長に対応するため、蛇腹部の長さをある程度確保する必要があり、この結果、ブーツのコンパクト化が阻害される場合がある。   Further, from a viewpoint different from the above, it is necessary to secure the length of the bellows part to some extent in order to correspond to the slide length of the shaft member, and as a result, downsizing of the boot may be hindered.

本発明は、上記のような問題に鑑みてなされたものであり、本発明の目的は、軸部材の伸縮を円滑に行なうことが可能で、かつ、コンパクト化が図られた軸継手構造および軸継手用ブーツを提供することにある。   The present invention has been made in view of the above problems, and an object of the present invention is to enable a shaft member to smoothly expand and contract, and to achieve a compact shaft coupling structure and shaft. It is to provide a boot for a joint.

本発明に係る軸継手構造は、第１の軸部材と、第１の軸部材を挿入量可変に受け入れる開口が形成された大径部分を先端部に有する第２の軸部材と、開口を含む空間を密閉するように第１の軸部材と大径部分とに固定されたブーツとを備える。ブーツは、大径部分の外周上に位置する円筒状蛇腹部と、大径部分と第１の軸部材との間に位置する円錐状蛇腹部と、円筒状蛇腹部と円錐状蛇腹部との間に位置する当該ブーツの内面に設けられ、大径部分の軸方向端面に向かって突出する突出部とを含む。   A shaft coupling structure according to the present invention includes a first shaft member, a second shaft member having a large-diameter portion formed with an opening for receiving the first shaft member in a variable amount of insertion at a tip portion, and an opening. A first shaft member and a boot fixed to the large diameter portion are provided so as to seal the space. The boot includes a cylindrical bellows portion located on the outer periphery of the large diameter portion, a conical bellows portion located between the large diameter portion and the first shaft member, and a cylindrical bellows portion and a conical bellows portion. A projecting portion that is provided on the inner surface of the boot positioned therebetween and projects toward the axial end surface of the large-diameter portion.

上記構成によれば、第１の軸部材が開口の奥側にスライドする際に、ブーツの内面から突出する突出部が大径部分の軸方向端面（または大径部分に取付けられた部材）に当接することで、当該突出部が支点となり、円筒状蛇腹部が伸張しながら円錐状蛇腹部が収縮することが可能になる。このように、円筒状蛇腹部が伸張することにより、円錐状蛇腹部が収縮することによるブーツ内部の空間容積の減少を補うことができるので、ブーツ内部の空間の圧力上昇によるスライド荷重の増大を抑制することができる。また、大径部分の外周に円筒状蛇腹部を形成することにより、蛇腹部の軸長を確保しながら軸継手構造のコンパクト化を図ることができる。   According to the said structure, when a 1st shaft member slides to the back | inner side of opening, the protrusion part which protrudes from the inner surface of a boot is an axial direction end surface (or member attached to the large diameter part) of a large diameter part. By abutting, the projecting portion becomes a fulcrum, and the conical bellows portion can contract while the cylindrical bellows portion expands. In this way, the expansion of the cylindrical bellows portion can compensate for the decrease in the space volume inside the boot due to the contraction of the conical bellows portion, thus increasing the slide load due to the pressure increase in the space inside the boot. Can be suppressed. Further, by forming the cylindrical bellows portion on the outer periphery of the large diameter portion, the shaft joint structure can be made compact while ensuring the axial length of the bellows portion.

本発明に係る軸継手用ブーツは、第１の軸部材と、該第１の軸部材を挿入量可変に受け入れる開口が形成された大径部分を先端部に有する第２の軸部材とに固定され、開口を含む空間を密閉するように設けられる軸継手用ブーツであって、大径部分の外周上に位置する円筒状蛇腹部と、大径部分と第１の軸部材との間に位置する円錐状蛇腹部と、円筒状蛇腹部と円錐状蛇腹部との間に位置する当該ブーツの内面に設けられ、大径部分の軸方向端面に向かって突出する突出部とを備える。   A boot for a shaft coupling according to the present invention is fixed to a first shaft member and a second shaft member having a large-diameter portion formed at an end portion for receiving the first shaft member with a variable insertion amount. A shaft coupling boot provided so as to seal a space including an opening, and is located between a cylindrical bellows portion located on an outer periphery of the large diameter portion and the large diameter portion and the first shaft member. A conical bellows portion, and a protrusion provided on the inner surface of the boot located between the cylindrical bellows portion and the conical bellows portion and projecting toward the axial end surface of the large diameter portion.

上記構成によれば、第１と第２の軸部材の伸縮を円滑にすることが可能であり、かつ、コンパクト化が図られた軸継手用ブーツが提供される。   According to the above configuration, the first and second shaft members can be smoothly expanded and contracted, and a shaft coupling boot that is compact is provided.

上記軸継手構造および上記軸継手用ブーツは、好ましくは、車両におけるドライブシャフトのインボード側の等速継手部に適用される。   The shaft joint structure and the shaft joint boot are preferably applied to a constant velocity joint portion on the inboard side of a drive shaft in a vehicle.

上記軸継手構造および上記軸継手用ブーツにおいて、１つの局面では、突出部は、円筒状蛇腹部および円錐状蛇腹部と一体成形により形成される。   In the shaft coupling structure and the shaft coupling boot, in one aspect, the protrusion is formed by integral molding with the cylindrical bellows portion and the conical bellows portion.

上記軸継手構造および上記軸継手用ブーツにおいて、他の局面では、突出部は、円筒状蛇腹部および円錐状蛇腹部と別に形成された部材をブーツの内面に取り付けることで形成される。   In the shaft joint structure and the shaft joint boot, in another aspect, the protrusion is formed by attaching a member formed separately from the cylindrical bellows portion and the conical bellows portion to the inner surface of the boot.

本発明によれば、軸継手構造において軸部材の伸縮を円滑に行なうことが可能になるとともに、軸継手構造のコンパクト化を図ることができる。   According to the present invention, the shaft member can be smoothly expanded and contracted in the shaft coupling structure, and the shaft coupling structure can be made compact.

以下に、本発明の実施の形態について説明する。なお、同一または相当する部分に同一の参照符号を付し、その説明を繰返さない場合がある。   Embodiments of the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

なお、以下に説明する実施の形態において、個数、量などに言及する場合、特に記載がある場合を除き、本発明の範囲は必ずしもその個数、量などに限定されない。また、以下の実施の形態において、各々の構成要素は、特に記載がある場合を除き、本発明にとって必ずしも必須のものではない。また、以下に複数の実施の形態が存在する場合、特に記載がある場合を除き、各々の実施の形態の構成を適宜組合わせることは、当初から予定されている。   Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified. In addition, when there are a plurality of embodiments below, it is planned from the beginning to appropriately combine the configurations of the embodiments unless otherwise specified.

本実施の形態に係る軸継手構造は、典型的には、車両のドライブシャフトのインボード側（車両内側）に設けられる等速ジョイントに適用される。図１を用いて、当該等速ジョイントの基本的構造について説明する。   The shaft coupling structure according to the present embodiment is typically applied to a constant velocity joint provided on the inboard side (vehicle inner side) of a vehicle drive shaft. The basic structure of the constant velocity joint will be described with reference to FIG.

図１を参照して、本実施の形態に係る軸継手構造は、たとえば、シャフト１，２を連結する等速ジョイント（トリポード・ジョイント）に適用することが可能である。図１の例では、ホイール側（車両外側）にシャフト１が設けられ、ディファレンシャルギヤ側（車両内側）にシャフト２が設けられる。シャフト１の先端にトリポード１Ａが取り付けられ、トリポード１Ａの３脚にローラ１Ｂが嵌着される。シャフト２の先端には、開口２Ｂを有するアウターレース２Ａが設けられる。トリポード１Ａおよびローラ１Ｂは、開口２Ｂ内に挿入される。このようにすることで、シャフト１，２が矢印ＤＲ１方向に伸縮可能な状態で、シャフト１，２間で回転が伝達される。   Referring to FIG. 1, the shaft coupling structure according to the present embodiment can be applied to, for example, a constant velocity joint (tripod joint) that connects shafts 1 and 2. In the example of FIG. 1, the shaft 1 is provided on the wheel side (vehicle outer side), and the shaft 2 is provided on the differential gear side (vehicle inner side). The tripod 1A is attached to the tip of the shaft 1, and the roller 1B is fitted on the three legs of the tripod 1A. An outer race 2A having an opening 2B is provided at the tip of the shaft 2. Tripod 1A and roller 1B are inserted into opening 2B. By doing so, rotation is transmitted between the shafts 1 and 2 while the shafts 1 and 2 can be expanded and contracted in the direction of the arrow DR1.

次に、図２,図３を用いて、本実施の形態に係る軸継手構造について説明する。図２,図３を参照して、本実施の形態に係る軸継手構造では、アウターレース２Ａとシャフト１とに固定され、開口２Ｂ内を密閉するブーツ３が設けられる。なお、ブーツ３は、介装部材（中間部材）としてのグロメット４を介してアウターレース２Ａに固定される。ブーツ３が設けられることにより、シャフト１，２の結合部からのグリースの漏出や結合部内への異物の進入が抑制される。なお、ブーツ３は、典型的には、熱可塑性エラストマ（ＴＰＥ）やオレフィン系エラストマ（ＴＰＯ）などの樹脂により構成される。   Next, the shaft coupling structure according to the present embodiment will be described with reference to FIGS. 2 and 3, in the shaft coupling structure according to the present embodiment, a boot 3 is provided which is fixed to outer race 2A and shaft 1 and seals the inside of opening 2B. The boot 3 is fixed to the outer race 2A via a grommet 4 as an interposed member (intermediate member). By providing the boot 3, leakage of grease from the joint portion of the shafts 1 and 2 and entry of foreign matter into the joint portion are suppressed. Note that the boot 3 is typically made of a resin such as a thermoplastic elastomer (TPE) or an olefin elastomer (TPO).

ブーツ３は、アウターレース２Ａの外周に位置し、先端部がグロメット４に固定される円筒状蛇腹部１０と、シャフト２側（車両内側）からシャフト１側（車両外側）に向かってテーパ状に径が縮小する円錐状蛇腹部２０と、シャフト１に固定される小径リング部３０と、円筒状蛇腹部１０と円錐状蛇腹部２０との間に設けられ、アウターレース２Ａの軸方向端面に向かって突出する突出部４０とを含んで構成される。突出部４０は、ブーツ３の内面から突出するように形成される。   The boot 3 is located on the outer periphery of the outer race 2A, and has a cylindrical bellows portion 10 whose tip is fixed to the grommet 4, and is tapered from the shaft 2 side (vehicle inner side) toward the shaft 1 side (vehicle outer side). The conical bellows portion 20 whose diameter is reduced, the small-diameter ring portion 30 fixed to the shaft 1, the cylindrical bellows portion 10 and the conical bellows portion 20 are provided, and face the axial end surface of the outer race 2A. And projecting portion 40 projecting. The protrusion 40 is formed so as to protrude from the inner surface of the boot 3.

図３は、図２に示す状態からシャフト１が開口２Ｂの奥側にスライドした状態を示している。図３に示すように、シャフト１が開口２Ｂ内に押し込まれるときは、円錐状蛇腹部２０が収縮し（矢印ＤＲ２０）、突出部４０がグロメット４における当接部４Ａに当接する。なお、当接部４Ａは、グロメット４の軸方向端面を拡大させるように、グロメット４の円筒部分から径方向内方に突出して形成される。突出部４０が当接部４Ａに当接した結果、突出部４０が支点となって、円筒状蛇腹部１０が伸張する（矢印ＤＲ１０）。上記のように、円錐状蛇腹部２０が収縮することにより、ブーツ３内部の空間の容積が縮小されるが、一方で、円筒状蛇腹部１０が伸張することにより、縮小された空間の容積が補われる。なお、上記の例では、突出部４０がグロメット４に当接する例について説明したが、突出部４０がアウターレース２Ａの軸方向端面に当接するようにしてもよい。   FIG. 3 shows a state where the shaft 1 has slid to the back side of the opening 2B from the state shown in FIG. As shown in FIG. 3, when the shaft 1 is pushed into the opening 2 </ b> B, the conical bellows part 20 contracts (arrow DR <b> 20), and the projecting part 40 comes into contact with the contact part 4 </ b> A in the grommet 4. The contact portion 4A is formed so as to protrude radially inward from the cylindrical portion of the grommet 4 so as to enlarge the axial end surface of the grommet 4. As a result of the protrusion 40 abutting against the abutting part 4A, the protrusion 40 serves as a fulcrum and the cylindrical bellows part 10 extends (arrow DR10). As described above, when the conical bellows portion 20 contracts, the volume of the space inside the boot 3 is reduced. On the other hand, when the cylindrical bellows portion 10 expands, the volume of the reduced space is reduced. Be compensated. In the above example, the example in which the protruding portion 40 contacts the grommet 4 has been described. However, the protruding portion 40 may contact the axial end surface of the outer race 2A.

図４は、比較例に係る軸継手構造を示す図である。図４を参照して、本変形例では、図２，図３の例におけるブーツ３に代えてブーツ３Ａが設けられている。ブーツ３Ａは、グロメット４を介してアウターレース２Ａに固定される大径リング部１０Ａと、シャフト１側（車両外側）に向かってテーパ状に径が縮小する円錐状蛇腹部２０Ａと、シャフト１に固定される小径リング部３０Ａとを含んで構成される。   FIG. 4 is a diagram illustrating a shaft coupling structure according to a comparative example. Referring to FIG. 4, in this modification, a boot 3 </ b> A is provided instead of boot 3 in the examples of FIGS. 2 and 3. The boot 3A includes a large-diameter ring portion 10A fixed to the outer race 2A via the grommet 4, a conical bellows portion 20A whose diameter decreases in a tapered shape toward the shaft 1 side (the vehicle outer side), and the shaft 1 And a small-diameter ring portion 30A to be fixed.

図４の例では、大径リング部１０Ａに蛇腹部が形成されていない。したがって、図４の例において、シャフト１がシャフト２側にスライドすると、円錐状蛇腹部２０Ａが収縮することにより、ブーツ３Ａ内の密閉空間の容積が縮小される。   In the example of FIG. 4, the bellows part is not formed in the large-diameter ring part 10A. Therefore, in the example of FIG. 4, when the shaft 1 slides to the shaft 2 side, the conical bellows portion 20A contracts, thereby reducing the volume of the sealed space in the boot 3A.

上記のように、ブーツ３Ａ内の密閉空間の容積が縮小されることにより、シャフト１がシャフト２側にスライドする際の抵抗が増大する。この結果、シャフト１，２の車両への取付が行ないにくくなる場合がある。最近は、等速ジョイント用ブーツの素材として、従来のクロロプレンゴムに代えてＴＰＥやＴＰＯなどの樹脂がよく用いられるようになってきているが、このような樹脂はクロロプレンゴムよりも硬質であり、ブーツ内の密閉空間の圧力上昇によるスライド荷重への影響が敏感に現れやすい傾向にある。   As described above, when the volume of the sealed space in the boot 3A is reduced, the resistance when the shaft 1 slides toward the shaft 2 increases. As a result, it may be difficult to attach the shafts 1 and 2 to the vehicle. Recently, as materials for constant velocity joint boots, resins such as TPE and TPO are often used instead of conventional chloroprene rubber, but such resins are harder than chloroprene rubber. There is a tendency that the influence on the slide load due to the pressure increase in the enclosed space in the boot tends to appear sensitively.

これに対し、本実施の形態では、上述したように、アウターレース２Ａの外周に位置する円筒状蛇腹部１０が伸張することにより、密閉空間の容積が増大する。したがって、円錐状蛇腹部２０の収縮による密閉空間の容積の縮小の少なくとも一部が補われ、シャフト１のスライド荷重の増大が抑制される。   In contrast, in the present embodiment, as described above, the volume of the sealed space is increased by the expansion of the cylindrical bellows portion 10 located on the outer periphery of the outer race 2A. Therefore, at least a part of the reduction in the volume of the sealed space due to the contraction of the conical bellows portion 20 is compensated, and an increase in the slide load of the shaft 1 is suppressed.

また、アウターレース２Ａの外周に円筒状蛇腹部１０を形成することで、円錐状蛇腹部２０と合わせた蛇腹部全体の軸長を確保しながら、軸継手構造をコンパクトに形成することができる。図２においては、図４の比較例における円錐状蛇腹部２０Ａの外形を破線で示している。   Further, by forming the cylindrical bellows portion 10 on the outer periphery of the outer race 2A, the shaft joint structure can be compactly formed while ensuring the axial length of the entire bellows portion combined with the conical bellows portion 20. In FIG. 2, the outer shape of the conical bellows portion 20A in the comparative example of FIG. 4 is indicated by a broken line.

なお、突出部４０の形態は、図２，図３に示すものに限定されず、たとえば、図５に示すような形態であってもよい。また、突出部４０は、円筒状蛇腹部１０および円錐状蛇腹部２０と一体成形により形成されるものに限定されず、図６に示すように円筒状蛇腹部１０および円錐状蛇腹部２０と別に形成された部材をブーツ３の内面に（たとえば接着などにより）取り付けることで形成されてもよい。   In addition, the form of the protrusion part 40 is not limited to what is shown in FIG. 2, FIG. 3, For example, a form as shown in FIG. 5 may be sufficient. Further, the protruding portion 40 is not limited to the one integrally formed with the cylindrical bellows portion 10 and the conical bellows portion 20, but separately from the cylindrical bellows portion 10 and the conical bellows portion 20 as shown in FIG. You may form by attaching the formed member to the inner surface of boot 3 (for example, by adhesion etc.).

上述のように、本実施の形態に係る軸継手構造によれば、円筒状蛇腹部１０が伸張することにより、円錐状蛇腹部２０が収縮することによるブーツ３内部の空間容積の減少を補うことができるので、ブーツ３内部の空間の圧力上昇によるスライド荷重の増大を抑制することができる。また、アウターレース２Ａの外周に円筒状蛇腹部１０を形成することにより、蛇腹部の軸長を確保しながら軸継手構造のコンパクト化を図ることができる。   As described above, according to the shaft coupling structure according to the present embodiment, the expansion of the cylindrical bellows portion 10 compensates for the reduction in the space volume inside the boot 3 due to the conical bellows portion 20 contracting. Therefore, an increase in slide load due to an increase in pressure in the space inside the boot 3 can be suppressed. In addition, by forming the cylindrical bellows portion 10 on the outer periphery of the outer race 2A, the shaft joint structure can be made compact while ensuring the axial length of the bellows portion.

上述した内容について要約すると、以下のようになる。すなわち、本実施の形態に係る軸継手構造は、「第１の軸部材」としてのシャフト１と、シャフト１を挿入量可変に受け入れる開口２Ｂが形成された「大径部分」としてのアウターレース２Ａを先端部に有する「第２の軸部材」としてのシャフト２と、開口２Ｂを含む空間を密閉するようにシャフト１とアウターレース２Ａとに固定されたブーツ３とを備える。ブーツ３は、アウターレース２Ａの外周上に位置する円筒状蛇腹部１０と、アウターレース２Ａとシャフト１との間に位置する円錐状蛇腹部２０と、シャフト１の外周に固定される小径リング部３０と、円筒状蛇腹部１０と円錐状蛇腹部２０との間に位置するブーツ３０の内面に設けられ、アウターレース２Ａの軸方向端面に向かって突出する突出部４０とを有する。   The above contents are summarized as follows. That is, the shaft coupling structure according to the present embodiment includes a shaft 1 as a “first shaft member” and an outer race 2A as a “large-diameter portion” in which an opening 2B that receives the shaft 1 in a variable amount of insertion is formed. And a boot 3 fixed to the shaft 1 and the outer race 2A so as to seal the space including the opening 2B. The boot 3 includes a cylindrical bellows portion 10 positioned on the outer periphery of the outer race 2A, a conical bellows portion 20 positioned between the outer race 2A and the shaft 1, and a small-diameter ring portion fixed to the outer periphery of the shaft 1. 30 and a protrusion 40 provided on the inner surface of the boot 30 positioned between the cylindrical bellows portion 10 and the conical bellows portion 20 and protruding toward the end surface in the axial direction of the outer race 2A.

以上、本発明の実施の形態について説明したが、今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。   Although the embodiment of the present invention has been described above, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

等速ジョイントの基本的構造について説明する図である。It is a figure explaining the basic structure of a constant velocity joint. 本発明の１つの実施の形態に係る軸継手構造を示す側断面図（その１）である。It is a sectional side view (the 1) which shows the shaft coupling structure which concerns on one embodiment of this invention. 本発明の１つの実施の形態に係る軸継手構造を示す側断面図（その２）である。It is a sectional side view (the 2) which shows the shaft coupling structure which concerns on one embodiment of this invention. 比較例に係る軸継手構造を示す側断面図である。It is a sectional side view which shows the shaft coupling structure which concerns on a comparative example. 軸継手用ブーツに設けられる突出部の変形例を示す図である。It is a figure which shows the modification of the protrusion part provided in the boot for shaft couplings. 軸継手用ブーツに設けられる突出部の他の変形例を示す図である。It is a figure which shows the other modification of the protrusion part provided in the boot for shaft couplings.

符号の説明Explanation of symbols

１，２ シャフト、１Ａ トリポード、１Ｂ ローラ、２Ａ アウターレース、２Ｂ 開口、３，３Ａ ブーツ、４ グロメット、４Ａ 当接部、１０ 円筒状蛇腹部、１０Ａ 大径リング部、２０,２０Ａ 円錐状蛇腹部、３０,３０Ａ 小径リング部、４０ 突出部。   1, 2 shaft, 1A tripod, 1B roller, 2A outer race, 2B opening, 3, 3A boot, 4 grommet, 4A contact part, 10 cylindrical bellows part, 10A large diameter ring part, 20, 20A conical bellows part , 30, 30A Small diameter ring part, 40 projecting part.

Claims (8)

第１の軸部材と、
前記第１の軸部材を挿入量可変に受け入れる開口が形成された大径部分を先端部に有する第２の軸部材と、
前記開口を含む空間を密閉するように前記第１の軸部材と前記大径部分とに固定されたブーツとを備え、
前記ブーツは、前記大径部分の外周上に位置する円筒状蛇腹部と、前記大径部分と前記第１の軸部材との間に位置する円錐状蛇腹部と、前記円筒状蛇腹部と前記円錐状蛇腹部との間に位置する当該ブーツの内面に設けられ、前記大径部分の軸方向端面に向かって突出する突出部とを含む、軸継手構造。 A first shaft member;
A second shaft member having a large-diameter portion formed at an end portion for receiving the first shaft member in an amount of insertion variable;
A boot fixed to the first shaft member and the large diameter portion so as to seal a space including the opening;
The boot includes a cylindrical bellows portion located on an outer periphery of the large diameter portion, a conical bellows portion located between the large diameter portion and the first shaft member, the cylindrical bellows portion, and the A shaft coupling structure including a protruding portion provided on an inner surface of the boot located between the conical bellows portion and protruding toward an axial end surface of the large diameter portion. 車両におけるドライブシャフトのインボード側の等速継手部に適用される、請求項１に記載の軸継手構造。   The shaft coupling structure according to claim 1, which is applied to a constant velocity coupling portion on an inboard side of a drive shaft in a vehicle. 前記突出部は、前記円筒状蛇腹部および前記円錐状蛇腹部と一体成形により形成される、請求項１または請求項２に記載の軸継手構造。   The shaft coupling structure according to claim 1, wherein the protruding portion is formed by integral molding with the cylindrical bellows portion and the conical bellows portion. 前記突出部は、前記円筒状蛇腹部および前記円錐状蛇腹部と別に形成された部材を前記ブーツの内面に取り付けることで形成される、請求項１または請求項２に記載の軸継手構造。   3. The shaft coupling structure according to claim 1, wherein the projecting portion is formed by attaching a member formed separately from the cylindrical bellows portion and the conical bellows portion to an inner surface of the boot. 第１の軸部材と、該第１の軸部材を挿入量可変に受け入れる開口が形成された大径部分を先端部に有する第２の軸部材とに固定され、前記開口を含む空間を密閉するように設けられる軸継手用ブーツであって、
前記大径部分の外周上に位置する円筒状蛇腹部と、
前記大径部分と前記第１の軸部材との間に位置する円錐状蛇腹部と、
前記円筒状蛇腹部と前記円錐状蛇腹部との間に位置する当該ブーツの内面に設けられ、前記大径部分の軸方向端面に向かって突出する突出部とを備えた、軸継手用ブーツ。 The first shaft member and the second shaft member having a large diameter portion formed with an opening for receiving the first shaft member in a variable amount of insertion are fixed to the tip portion, and the space including the opening is sealed. A shaft coupling boot provided as follows:
A cylindrical bellows portion located on the outer periphery of the large-diameter portion;
A conical bellows portion located between the large-diameter portion and the first shaft member;
A shaft coupling boot, comprising: a protrusion provided on an inner surface of the boot located between the cylindrical bellows portion and the conical bellows portion and protruding toward an axial end surface of the large diameter portion. 車両におけるドライブシャフトのインボード側の等速継手部に適用される、請求項５に記載の軸継手用ブーツ。   The shaft coupling boot according to claim 5, which is applied to a constant velocity coupling portion on an inboard side of a drive shaft in a vehicle. 前記突出部は、前記円筒状蛇腹部および前記円錐状蛇腹部と一体成形により形成される、請求項５または請求項６に記載の軸継手用ブーツ。   The shaft coupling boot according to claim 5 or 6, wherein the protrusion is formed by integral molding with the cylindrical bellows portion and the conical bellows portion. 前記突出部は、前記円筒状蛇腹部および前記円錐状蛇腹部と別に形成された部材を前記ブーツの内面に取り付けることで形成される、請求項５または請求項６に記載の軸継手用ブーツ。   The shaft coupling boot according to claim 5 or 6, wherein the protruding portion is formed by attaching a member formed separately from the cylindrical bellows portion and the conical bellows portion to an inner surface of the boot.
JP2007137776A 2007-05-24 2007-05-24 Shaft coupling structure and boot for shaft coupling Pending JP2008291912A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210123481A1 (en) * 2017-03-16 2021-04-29 Ntn Corporation Boot for constant velocity universal joint

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5630632U (en) * 1979-08-16 1981-03-25
JPH0375357U (en) * 1989-11-27 1991-07-29
JP2003148449A (en) * 2001-11-14 2003-05-21 Somic Ishikawa Inc Cover and ball joint of joint device
JP2005147297A (en) * 2003-11-17 2005-06-09 Toyoda Gosei Co Ltd Boot
JP2006213270A (en) * 2005-02-07 2006-08-17 Ntn Corp Axle module for rear wheel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5630632U (en) * 1979-08-16 1981-03-25
JPH0375357U (en) * 1989-11-27 1991-07-29
JP2003148449A (en) * 2001-11-14 2003-05-21 Somic Ishikawa Inc Cover and ball joint of joint device
JP2005147297A (en) * 2003-11-17 2005-06-09 Toyoda Gosei Co Ltd Boot
JP2006213270A (en) * 2005-02-07 2006-08-17 Ntn Corp Axle module for rear wheel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210123481A1 (en) * 2017-03-16 2021-04-29 Ntn Corporation Boot for constant velocity universal joint
US11761492B2 (en) * 2017-03-16 2023-09-19 Ntn Corporation Boot for constant velocity universal joint

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