JP2009264418A - Outside joint member of constant velocity universal joint - Google Patents

Outside joint member of constant velocity universal joint Download PDF

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Publication number
JP2009264418A
JP2009264418A JP2008111463A JP2008111463A JP2009264418A JP 2009264418 A JP2009264418 A JP 2009264418A JP 2008111463 A JP2008111463 A JP 2008111463A JP 2008111463 A JP2008111463 A JP 2008111463A JP 2009264418 A JP2009264418 A JP 2009264418A
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Japan
Prior art keywords
constant velocity
joint member
velocity universal
universal joint
root
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JP2008111463A
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Japanese (ja)
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Kisao Yamazaki
起佐雄 山崎
Kazuhiko Ochi
和彦 越智
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2008111463A priority Critical patent/JP2009264418A/en
Priority to PCT/JP2009/056857 priority patent/WO2009130982A1/en
Publication of JP2009264418A publication Critical patent/JP2009264418A/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
    • F16D3/16—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
    • F16D3/22—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/2237—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts where the grooves are composed of radii and adjoining straight lines, i.e. undercut free [UF] type joints
    • 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
    • F16D3/22—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22326—Attachments to the outer joint member, i.e. attachments to the exterior of the outer joint member or to the shaft of the outer joint member

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight and inexpensive outside joint member of a constant velocity universal joint for preventing the delay destruction of a root portion. <P>SOLUTION: The outside joint member of the constant velocity universal joint includes a mouse part 7 in which an inside joint member 2 is stored, and a stem part 10 protruded from a bottom portion 8 of the mouse part 7, wherein the root portion 17 as a corner portion between the stem part 10 and the mouse part 7 is formed in a rounded shape. A stress relaxing recessed cutoff portion 16 is formed in the rounded-shape root portion 17 at the side of the stem part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、等速自在継手の外側継手部材に関する。   The present invention relates to an outer joint member of a constant velocity universal joint.

２ＷＤ車及び４ＷＤ車向けに使用されるいわゆるドライブシャフトは、図９に示すようなアウトボード側（自動車に組付けた状態で外側となる方）の固定式等速自在継手１０４と、インボード側（自動車に組付けた状態で内側となる方）の摺動式等速自在継手（図示省略）とを図示省略の中間シャフトで結合した構成を有する。アウトボード側の等速自在継手１０４は、車輪用軸受装置で回転自在に支持されたハブ輪１０２に結合される。   The so-called drive shaft used for 2WD vehicles and 4WD vehicles is composed of a fixed constant velocity universal joint 104 on the outboard side as shown in FIG. A sliding type constant velocity universal joint (not shown) on the inner side in a state where it is assembled in an automobile is connected by an intermediate shaft (not shown). The constant velocity universal joint 104 on the outboard side is coupled to a hub wheel 102 that is rotatably supported by a wheel bearing device.

車輪用軸受装置としては、例えば図９に示すようなものがある。この車輪用軸受装置は、外径方向に延びるフランジ１０１を有するハブ輪１０２と、このハブ輪１０２に外側継手部材１０３のステム部１２３が固定される等速自在継手１０４と、ハブ輪１０２の外周側に配設される外方部材１０５とを備える。   An example of a wheel bearing device is shown in FIG. The wheel bearing device includes a hub wheel 102 having a flange 101 extending in an outer diameter direction, a constant velocity universal joint 104 to which a stem portion 123 of an outer joint member 103 is fixed to the hub wheel 102, and an outer periphery of the hub wheel 102. And an outer member 105 disposed on the side.

等速自在継手１０４は、前記外側継手部材１０３と、この外側継手部材１０３のマウス部１０７内に配設される内側継手部材１０８と、この内側継手部材１０８と外側継手部材１０３との間に配設されるボール１０９と、このボール１０９を保持する保持器１１０とを備える。また、内側継手部材１０８の中心孔の内周面にはスプライン部１１１が形成され、この中心孔にシャフト１３０の端部スプライン部１３６が挿入されて、内側継手部材１０８側のスプライン部１１１とシャフト側のスプライン部１３６とが係合される。   The constant velocity universal joint 104 is arranged between the outer joint member 103, the inner joint member 108 disposed in the mouth portion 107 of the outer joint member 103, and the inner joint member 108 and the outer joint member 103. A ball 109 is provided, and a holder 110 that holds the ball 109. Further, a spline portion 111 is formed on the inner peripheral surface of the center hole of the inner joint member 108, and an end spline portion 136 of the shaft 130 is inserted into the center hole so that the spline portion 111 and the shaft on the inner joint member 108 side are inserted. The side spline 136 is engaged.

また、ハブ輪１０２は、筒部１１３と前記フランジ１０１とを有し、フランジ１０１の外端面１１４（反継手側の端面）には、図示省略のホイールおよびブレーキロータが装着される短筒状のパイロット部１１５が突設されている。   The hub wheel 102 has a cylindrical portion 113 and the flange 101, and a short cylindrical shape in which a wheel and a brake rotor (not shown) are mounted on the outer end surface 114 (end surface on the opposite joint side) of the flange 101. A pilot part 115 is provided in a protruding manner.

そして、筒部１１３のフランジ側の外周面に切欠部１４０が設けられ、この切欠部１４０にアウトボード側の第１内輪１１６及びインボード側の第２内輪１１７が嵌合されている。第１内輪１１６の外周面に第１内側転走面１１８が設けられ、内輪１１７の外周面に第２内側転走面１１９が設けられている。また、ハブ輪１０２のフランジ１０１にはボルト装着孔１１２が設けられて、ホイールおよびブレーキロータをこのフランジ１０１に固定するためのハブボルト１２９がこのボルト装着孔１１２に装着される。   A notch 140 is provided on the outer peripheral surface of the cylindrical portion 113 on the flange side, and the first inner ring 116 on the outboard side and the second inner ring 117 on the inboard side are fitted into the notch 140. A first inner rolling surface 118 is provided on the outer peripheral surface of the first inner ring 116, and a second inner rolling surface 119 is provided on the outer peripheral surface of the inner ring 117. Further, a bolt mounting hole 112 is provided in the flange 101 of the hub wheel 102, and a hub bolt 129 for fixing the wheel and the brake rotor to the flange 101 is mounted in the bolt mounting hole 112.

内周に２列の外側転走面１２０、１２１が設けられている外方部材１０５と、外方部材１０５の第１外側転走面１２０と対向する内側転走面１１８を有する第１内方部材１１６と、外方部材１０５の第２外側転走面１２１と対向する内側転走面１１９を有する第２内方部材１１７と、外方部材１０５と内方部材１１６、１１７との間に介装される転動体１２２とで転がり軸受を形成する。   A first inner side having an outer member 105 provided with two rows of outer rolling surfaces 120, 121 on the inner periphery, and an inner rolling surface 118 facing the first outer rolling surface 120 of the outer member 105. A member 116, a second inner member 117 having an inner rolling surface 119 facing the second outer rolling surface 121 of the outer member 105, and an outer member 105 and an inner member 116, 117 are interposed between them. A rolling bearing is formed with the rolling elements 122 to be mounted.

ハブ輪１０２の筒部１１３に外側継手部材１０３のステム部１２３が挿入される。ステム部１２３は、その反マウス部の端部にねじ部１２４が形成され、このねじ部１２４とマウス部１０７との間にスプライン部１２５が形成されている。また、ハブ輪１０２の筒部１１３の内周面（内径面）にスプライン部１２６が形成され、ステム部１２３がハブ輪１０２の筒部１１３に挿入された際には、ステム部１２３側のスプライン部１２５とハブ輪１０２側のスプライン部１２６とが係合する。   The stem portion 123 of the outer joint member 103 is inserted into the tube portion 113 of the hub wheel 102. The stem portion 123 has a screw portion 124 formed at the end of the anti-mouse portion, and a spline portion 125 is formed between the screw portion 124 and the mouse portion 107. A spline portion 126 is formed on the inner peripheral surface (inner diameter surface) of the tube portion 113 of the hub wheel 102, and when the stem portion 123 is inserted into the tube portion 113 of the hub wheel 102, the spline on the stem portion 123 side. The portion 125 engages with the spline portion 126 on the hub wheel 102 side.

そして、筒部１１３から突出したステム部１２３のねじ部１２４にナット部材１２７が螺着され、ハブ輪１０２と外側継手部材１０３とが連結される。この際、ナット部材１２７の内端面（裏面）１２８と筒部１１３の外端面１２９とが当接するとともに、マウス部１０７のステム部側の端面１３１と第２内輪１１７の外端面１３２とが当接する。すなわち、ナット部材１２７を締付けることによって、ハブ輪１０２が内輪１１６、１１７を介してナット部材１２７とマウス部１０７とで挟持される。この場合、マウス部１０７のステム部側の端面１３１が、内輪１１６、１１７に与圧する。   Then, the nut member 127 is screwed onto the threaded portion 124 of the stem portion 123 protruding from the cylindrical portion 113, and the hub wheel 102 and the outer joint member 103 are connected. At this time, the inner end surface (back surface) 128 of the nut member 127 and the outer end surface 129 of the cylindrical portion 113 are in contact with each other, and the end surface 131 on the stem portion side of the mouse portion 107 and the outer end surface 132 of the second inner ring 117 are in contact with each other. . That is, by tightening the nut member 127, the hub wheel 102 is sandwiched between the nut member 127 and the mouth portion 107 via the inner rings 116 and 117. In this case, the end surface 131 on the stem portion side of the mouse portion 107 pressurizes the inner rings 116 and 117.

このように、等速自在継手１０４の外側継手部材１０３をハブ輪１０２に結合する際には、ハブボルトを強固に締付る必要がある。このため、外側継手部材１０３の遅れ破壊が問題になることがある。遅れ破壊とは、一定の引張応力が付加されている状態で、ある時間が経過したのち、外見上はほとんど塑性変形を伴わずに突然脆性的に破壊する現象である。この遅れ破壊は、外側継手部材においては、応力が高くなるねじ部１２４とスプライン部１２５との間の中間部１３３や、ステム部１２３とマウス部１０７のコーナ部である付根部１３４で特に生じ易い。   Thus, when the outer joint member 103 of the constant velocity universal joint 104 is coupled to the hub wheel 102, it is necessary to firmly tighten the hub bolt. For this reason, delayed fracture of the outer joint member 103 may be a problem. Delayed fracture is a phenomenon in which a certain tensile stress is applied, and after a certain period of time, the fracture suddenly breaks brittlely with almost no plastic deformation. In the outer joint member, this delayed fracture is particularly likely to occur at the intermediate portion 133 between the screw portion 124 and the spline portion 125 where the stress becomes high, and at the root portion 134 that is the corner portion of the stem portion 123 and the mouse portion 107. .

そこで、ねじ部１２４とスプライン部１２５との間の中間部１３３で遅れ破壊を防止する方法が提案されている（特許文献１）。外側継手部材の熱処理は通常、高周波焼入もしくは浸炭焼入が用いられる。ところが、遅れ破壊は熱処理硬化層部のように硬さが硬いほど発生し易い。このため、中間部１３３では硬度を低下させることで遅れ破壊を防止するか、高周波焼入品の場合は中間部１３３に焼入れを施さないようにしている。この場合、特許文献１のものは、加熱温度と加熱時間とを正確に管理する必要がある。   Therefore, a method for preventing delayed fracture at the intermediate portion 133 between the screw portion 124 and the spline portion 125 has been proposed (Patent Document 1). For the heat treatment of the outer joint member, induction hardening or carburizing quenching is usually used. However, delayed fracture is more likely to occur as the hardness increases as in the heat-treated cured layer portion. For this reason, in the intermediate part 133, delayed fracture is prevented by reducing the hardness, or in the case of induction hardening, the intermediate part 133 is not quenched. In this case, the thing of patent document 1 needs to manage heating temperature and heating time correctly.

一方、付根部１３４では、捩りに対する強度を確保するために、熱処理による表面硬化が必要不可欠となる。このため、付根部１３４での遅れ破壊対策の方法としては、付根部１３４の硬さを、強度を確保できる範囲で低下させる方法がある（特許文献２）。その他に、付根部１３４のアール形状を大きくして、付根部１３４にかかる応力を緩和したり、マウス部の底部１３５の肉厚を厚く設計し、アール部にかかる応力を緩和したりする方法もある。
特公昭６３−５４５５号公報 特開平５−９５８３号公報 On the other hand, in the root portion 134, surface hardening by heat treatment is indispensable in order to ensure strength against torsion. For this reason, there is a method of reducing the hardness of the root portion 134 within a range in which the strength can be secured as a method of countermeasures for delayed fracture at the root portion 134 (Patent Document 2). In addition, there is a method in which the radius shape of the root portion 134 is increased to relieve the stress applied to the root portion 134, or the thickness of the bottom portion 135 of the mouse portion is designed to be thick so as to reduce the stress applied to the radius portion. is there.
Japanese Patent Publication No. 63-5455 Japanese Patent Laid-Open No. 5-9583

しかしながら、特許文献１に記載されたものは、加熱温度と加熱時間とを正確に管理する必要があり、コストアップに繋がる。また、特許文献２に記載されたもののように、付根部１３４の硬さを、強度を確保できる範囲で低下させる方法は、熱処理工程が複雑になるためコストアップに繋がる。また、付根部１３４のアール形状を大きくして、付根部１３４にかかる応力を緩和する方法では、アール形状を大きくしすぎると重量が増える上、相手部品であるハブ輪１０２との干渉を考慮するとアール形状の大きさに限界がある。さらには、底部１３５の肉厚を厚く設計し、付根部１３４に掛かる応力を緩和する方法は、等速自在継手自体の重量増となる。このような理由により、低コスト化と軽量化による燃費向上という自動車市場の要求に答えるのが困難であった。   However, the device described in Patent Document 1 needs to accurately manage the heating temperature and the heating time, leading to an increase in cost. Moreover, the method of reducing the hardness of the root portion 134 as long as the strength can be ensured as described in Patent Document 2 leads to an increase in cost because the heat treatment process becomes complicated. Further, in the method of relieving the stress applied to the root portion 134 by enlarging the radius shape of the root portion 134, if the radius shape is too large, the weight increases and the interference with the hub wheel 102 which is the counterpart component is considered. There is a limit to the size of the round shape. Furthermore, a method of reducing the stress applied to the root portion 134 by designing the bottom portion 135 to be thick increases the weight of the constant velocity universal joint itself. For these reasons, it has been difficult to meet the demands of the automobile market for improving fuel efficiency by reducing cost and weight.

本発明は、上記課題に鑑みて、付根部の遅れ破壊を防止することができて、軽量かつ低コストな等速自在継手の外側継手部材を提供する。   In view of the above-described problems, the present invention provides an outer joint member of a constant velocity universal joint that can prevent delayed fracture of a root portion and is lightweight and low in cost.

本発明の等速自在継手の外側継手部材は、内側継手部材が収容されるマウス部と、マウス部の底部から突設されるステム部とを有し、ステム部とマウス部とのコーナ部である付根部がアール状とされた等速自在継手の外側継手部材であって、アール状の付根部のステム部側に応力緩和用凹窪ぬすみ部を形成したものである。   The outer joint member of the constant velocity universal joint of the present invention has a mouth portion in which the inner joint member is accommodated, and a stem portion protruding from the bottom portion of the mouth portion, and a corner portion between the stem portion and the mouth portion. It is an outer joint member of a constant velocity universal joint having a certain root portion in a round shape, and a stress relief recessed hollow portion is formed on the stem portion side of the round shape root portion.

本発明の他の等速自在継手の外側継手部材は、内側継手部材が収容されるマウス部と、マウス部の底部から突設されるステム部とを有し、ステム部とマウス部とのコーナ部である付根部がアール状とされた等速自在継手の外側継手部材であって、アール状の付根部のマウス部側に応力緩和用凹窪ぬすみ部を形成したものである。   An outer joint member of another constant velocity universal joint of the present invention has a mouth portion in which the inner joint member is accommodated and a stem portion protruding from the bottom portion of the mouth portion, and a corner between the stem portion and the mouth portion. This is an outer joint member of a constant velocity universal joint having a root portion which is a round shape, and a stress relief recessed hollow portion is formed on the mouth portion side of the round shape root portion.

本発明の別の等速自在継手の外側継手部材は、内側継手部材が収容されるマウス部と、マウス部の底部から突設されるステム部とを有し、ステム部とマウス部とのコーナ部である付根部がアール状とされた等速自在継手の外側継手部材であって、アール状の付根部のステム部側とマウス部側の両方に応力緩和用凹窪ぬすみ部を形成したものである。   An outer joint member of another constant velocity universal joint of the present invention has a mouth portion in which the inner joint member is accommodated and a stem portion protruding from the bottom portion of the mouth portion, and a corner between the stem portion and the mouth portion. This is an outer joint member of a constant velocity universal joint whose root is a rounded shape, and a concave relief hollow for stress relaxation is formed on both the stem side and the mouse side of the rounded root. It is.

本発明の等速自在継手の外側継手部材は、アール状の付根部に応力緩和用凹窪ぬすみ部を設けているため、この応力緩和用凹窪ぬすみ部にて付根部に対する応力集中を緩和することができる。また、この応力緩和用凹窪ぬすみ部を設けることにより、軽量化を図ることができる。しかも、マウス部の底部の肉厚を厚くする必要がなくなるため、一層軽量化を図ることができる。さらには、通常の従来品の付根部よりも膨らまないので、この付根部に対向する相手部材（ハブ輪）との隙間を十分確保することができ、対面する相手部材と干渉するのを防止することができる。   Since the outer joint member of the constant velocity universal joint of the present invention is provided with the recessed relief hollow portion for stress relaxation at the rounded root portion, the stress concentration on the root portion is relaxed by the recessed relief hollow portion for stress relaxation. be able to. Moreover, weight reduction can be achieved by providing the concave relief hollow portion for stress relaxation. In addition, since it is not necessary to increase the thickness of the bottom of the mouse portion, the weight can be further reduced. Furthermore, since it does not swell more than the root part of a normal conventional product, a sufficient gap can be secured between the mating member (hub wheel) facing the root part and interference with the facing mating member can be prevented. be able to.

中炭素鋼にて構成した場合、前記応力緩和用凹窪ぬすみ部に高周波熱処理による熱処理硬化層を形成することができる。また、浸炭鋼にて構成した場合、前記応力緩和用凹窪ぬすみ部に浸炭熱処理による熱処理硬化層を形成することができる。   When the medium carbon steel is used, a heat-treated hardened layer can be formed by induction heat treatment in the recessed portion for stress relaxation. Moreover, when comprised by carburizing steel, the heat-treatment hardening layer by carburizing heat processing can be formed in the said concave hollow part for stress relaxation.

前記応力緩和用凹窪ぬすみ部を冷間鍛造成形にて成形したり、前記応力緩和用凹窪ぬすみ部を切削加工又は研削加工にて成形したりすることができる。   The stress relief concave hollow portion can be formed by cold forging, or the stress relaxation concave hollow portion can be formed by cutting or grinding.

前記応力緩和用凹窪ぬすみ部を、周方向に沿って連続的に形成したり、前記応力緩和用凹窪ぬすみ部を、周方向に沿って断続的に形成したりすることができる。   The stress relief recessed hollow portion can be formed continuously along the circumferential direction, or the stress relaxation recessed hollow portion can be formed intermittently along the circumferential direction.

前記応力緩和用凹窪ぬすみ部に、表面加工手段にて圧縮残留応力を付与することができる。ここで、表面加工手段としては、例えば、ショットピーニング処理がある。ショットピーング処理を行うと、応力緩和用凹窪ぬすみ部に圧縮の残留応力が発生し、それがぬすみ部に発生した引張応力を打ち消すことができる。   A compressive residual stress can be applied to the concave relief hollow portion for stress relaxation by the surface processing means. Here, as the surface processing means, for example, there is a shot peening process. When the shot peening process is performed, a compressive residual stress is generated in the concave relief hollow portion for stress relaxation, and this can cancel the tensile stress generated in the thin portion.

本発明の等速自在継手の外側継手部材では、応力緩和用凹窪ぬすみ部を設けることで付根部のアール形状の曲率半径を大きくすることができ、応力集中を緩和することができるため、遅れ破壊を防止することができる。また、この応力緩和用凹窪ぬすみ部を設けることにより、軽量化を図ることができるため、材料費の削減による低コスト化、重量削減による自動車の燃費向上が可能となり、しかも容易に応力緩和用凹窪ぬすみ部を形成することができる。さらには、マウス部が相手部材と干渉することを防止することができて、長期にわたって安定した機能を発揮することができる。   In the outer joint member of the constant velocity universal joint according to the present invention, by providing a concave relief hollow portion for stress relaxation, the radius of curvature of the base portion can be increased, and stress concentration can be relaxed. Destruction can be prevented. In addition, by providing this stress relief recessed hollow part, it is possible to reduce the weight, so the cost can be reduced by reducing the material cost, the fuel efficiency of the vehicle can be improved by reducing the weight, and the stress relief can be easily done. A recessed hollow portion can be formed. Furthermore, it is possible to prevent the mouse part from interfering with the mating member, and to exhibit a stable function over a long period of time.

前記応力緩和用凹窪ぬすみ部を付根部のマウス部側に設けたり、前記応力緩和用凹窪ぬすみ部を付根部のコーナ部に設けたりできるため、相手部材の形状に応じて、相手部材と干渉しない位置に応力緩和用凹窪ぬすみ部を設けることができる。   According to the shape of the mating member and the mating member, it is possible to provide the stress relief concave hollow portion on the mouth portion side of the root portion or to provide the stress relaxation concave hollow portion at the corner portion of the root portion. It is possible to provide a recessed portion for stress relaxation at a position where the interference does not occur.

前記応力緩和用凹窪ぬすみ部を形成することにより、熱処理硬化層を形成することができる。この場合、中炭素鋼にて構成された外側継手部材に、高周波熱処理による熱処理硬化層を形成したり、浸炭鋼にて構成された外側継手部材に、浸炭熱処理による熱処理硬化層を形成したりして、付根部の硬度を大とすることができる。   A heat-treated cured layer can be formed by forming the concave relief hollow portion for stress relaxation. In this case, a heat-treated hardened layer by high-frequency heat treatment is formed on the outer joint member made of medium carbon steel, or a heat-treated hardened layer by carburizing heat treatment is formed on the outer joint member made of carburized steel. Thus, the hardness of the root portion can be increased.

前記応力緩和用凹窪ぬすみ部を冷間鍛造成形にて成形したり、前記応力緩和用凹窪ぬすみ部を切削加工又は研削加工にて成形したりすることができる。特に冷間鍛造成形にて形成した場合、コストの低減を図ることができる。   The stress relief concave hollow portion can be formed by cold forging, or the stress relaxation concave hollow portion can be formed by cutting or grinding. In particular, when formed by cold forging, the cost can be reduced.

前記応力緩和用凹窪ぬすみ部を、周方向に沿って連続的又は断続的に形成することができる。このため、相手部材の形状に応じて応力緩和用凹窪ぬすみ部を設けることができる。特に、全周にわたって連続的に応力緩和用凹窪ぬすみ部を形成すると、応力集中の緩和に優れ、重量の低減を図ることもできる。   The stress relief recessed hollow portion can be formed continuously or intermittently along the circumferential direction. For this reason, the concave relief hollow part for stress relaxation can be provided according to the shape of the other member. In particular, when the recessed portion for stress relaxation is formed continuously over the entire circumference, the stress concentration is excellent and the weight can be reduced.

前記応力緩和用凹窪ぬすみ部に表面加工手段にて圧縮残留応力を付与すると、付根部に発生した圧縮の残留応力が付根部に発生した引張応力を打ち消して、更に優れた遅れ破壊対策とすることができる。   When compressive residual stress is applied to the concave relief hollow portion for stress relaxation by surface processing means, the compressive residual stress generated at the root portion cancels out the tensile stress generated at the root portion, thereby providing a more excellent countermeasure against delayed fracture. be able to.

以下、本発明の実施の形態を図１〜図６に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to FIGS.

図１は、本発明の第１実施形態の外側継手部材が使用された等速自在継手である。この等速自在継手は、外側継手部材１と、外側継手部材１の内側に配された内側継手部材２と、外側継手部材１と内側継手部材２との間に介在してトルクを伝達する複数のボール３と、外側継手部材１と内側継手部材２との間に介在してボール３を保持するケージ４とを主要な部材として構成される。   FIG. 1 is a constant velocity universal joint using the outer joint member of the first embodiment of the present invention. The constant velocity universal joint includes a plurality of outer joint members 1, an inner joint member 2 disposed inside the outer joint member 1, and a plurality of torque transmissions interposed between the outer joint member 1 and the inner joint member 2. The ball 3 and the cage 4 that is interposed between the outer joint member 1 and the inner joint member 2 and holds the ball 3 are configured as main members.

内側継手部材２は、その外周面に複数のトラック溝６が形成されている。この内側継手部材２の中心孔（内径孔）２２にシャフト２３を挿してスプライン嵌合させ、そのスプライン嵌合により両者間でトルク伝達可能としている。なお、シャフト２３の端部には、シャフト抜け止め用の止め輪９が嵌合されている。   The inner joint member 2 has a plurality of track grooves 6 formed on the outer peripheral surface thereof. A shaft 23 is inserted into the center hole (inner diameter hole) 22 of the inner joint member 2 and is spline-fitted, and torque can be transmitted between the two by the spline fitting. A retaining ring 9 for preventing the shaft from coming off is fitted to the end of the shaft 23.

外側継手部材１は、例えば中炭素鋼にて構成され、内側継手部材２、ケージ４およびボール３を収容した円筒面を有するカップ状のマウス部７と、このマウス部７の底部８から軸方向に一体的に延びるステム部１０とを有する。ステム部１０とマウス部７とのコーナ部にはアール状の付根部１７が形成されている。ステム部１０は、大径部１０ａと、大径部１０ａに連設される小径部１０ｂとからなる。大径部１０ａは、図示省略の相手部材（ハブ輪の孔部の内径面の雌スプライン）と嵌合する雄スプライン２０が形成された嵌合部２１と、その外径面が円筒面とされる基端部１８ａとを備える。基端部１８ａの外径寸法は、雄スプライン２０の最外径寸法（スプライン２１の凸部の頂点を結ぶ円弧の外径寸法）より小さく、雄スプライン２１の最小外径（スプライン２１の凹部の底を結ぶ円弧の外径寸法）よりも大きく設定されている。小径部１０ｂの外周面には、ねじ部１２が形成されている。   The outer joint member 1 is made of, for example, medium carbon steel, and has a cup-like mouth portion 7 having a cylindrical surface that houses the inner joint member 2, the cage 4, and the ball 3, and an axial direction from the bottom portion 8 of the mouth portion 7. And a stem portion 10 extending integrally therewith. A rounded root portion 17 is formed at a corner portion between the stem portion 10 and the mouse portion 7. The stem portion 10 includes a large-diameter portion 10a and a small-diameter portion 10b connected to the large-diameter portion 10a. The large-diameter portion 10a includes a fitting portion 21 in which a male spline 20 to be fitted to a mating member (not shown) (female spline on the inner diameter surface of the hub wheel hole) is formed, and its outer diameter surface is a cylindrical surface. And a proximal end portion 18a. The outer diameter of the base end portion 18a is smaller than the outermost diameter of the male spline 20 (the outer diameter of the arc connecting the vertices of the protrusions of the spline 21), and the minimum outer diameter of the male spline 21 (the recess of the spline 21). It is set larger than the outer diameter dimension of the arc connecting the bottoms). A screw portion 12 is formed on the outer peripheral surface of the small diameter portion 10b.

マウス部７の内周面（円筒状内周面）に内側継手部材２のトラック溝６と同数のトラック溝５が形成されている。外側継手部材１のトラック溝５と内側継手部材２のトラック溝６との間にトルクを伝達する複数のボール３が組み込まれている。内側継手部材２と外側継手部材１の間にケージ４が配置され、ボール３は、ケージ４のポケット１１内に保持されている。   The same number of track grooves 5 as the track grooves 6 of the inner joint member 2 are formed on the inner peripheral surface (cylindrical inner peripheral surface) of the mouse portion 7. A plurality of balls 3 for transmitting torque are incorporated between the track groove 5 of the outer joint member 1 and the track groove 6 of the inner joint member 2. The cage 4 is disposed between the inner joint member 2 and the outer joint member 1, and the balls 3 are held in the pockets 11 of the cage 4.

付根部１７のステム部側には、図２に示すように、冷間鍛造成形にて、深さ寸法ｔ１のぬすみ部（応力緩和用凹窪ぬすみ部）１６ａを周方向に沿って連続的に形成している。すなわち、付根部１７のステム部側が、ステム部１０の基端部１８ａよりも最大でｔ１だけ内径側となるように、付根部１７のステム部側を切欠いている。このため、付根部１７のステム部側には、曲率半径Ｒａのぬすみ部１６ａが形成される。なお、ぬすみ部１６ａを設けない場合の付根部１７を構成する曲率半径をＲｂとすると、Ｒａ＞Ｒｂとなる。なお、図２における仮想線は、ぬすみ部１６ａを設けない場合の付根部１７を示す。よって、ぬすみ部を設けない場合と比較して、付根アールの曲率半径を大きくすることができ、付根部にかかる応力を緩和することができる。   On the stem portion side of the root portion 17, as shown in FIG. 2, a cold-forged forming portion 16 a having a depth dimension t <b> 1 (stress relief recessed hollow portion) is continuously provided along the circumferential direction. Forming. That is, the stem portion side of the root portion 17 is notched so that the stem portion side of the root portion 17 is at the inner diameter side by t1 at most from the base end portion 18a of the stem portion 10. For this reason, on the side of the stem portion of the root portion 17, a thin portion 16 a having a curvature radius Ra is formed. In addition, if the curvature radius which comprises the root part 17 when not providing the thinning part 16a is set to Rb, it will become Ra> Rb. In addition, the virtual line in FIG. 2 shows the root portion 17 when the shading portion 16a is not provided. Therefore, the radius of curvature of the root radius can be increased and the stress applied to the root portion can be relieved compared to the case where the lightening portion is not provided.

このように、本発明の第１実施形態の等速自在継手の外側継手部材では、アール状の付根部１７のステム部側に応力緩和用凹窪ぬすみ部１６ａを設けているため、このぬすみ部１６ａにて付根部１７に対する応力集中を緩和することができて、遅れ破壊を防止することができる。また、このぬすみ部１６ａを設けることにより、軽量化を図ることができるため、材料費の削減による低コスト化、重量削減による自動車の燃費向上が可能となり、しかも容易にぬすみ部１６ａを形成することができる。しかも、マウス部７の底部８の肉厚を厚くする必要がなくなるため、一層軽量化を図ることができる。さらには、マウス部７の底部８が、底部８と対面する相手部材と干渉するのを防止することができて、長期にわたって安定した機能を発揮することができる。   As described above, in the outer joint member of the constant velocity universal joint according to the first embodiment of the present invention, since the stress relief recessed hollow portion 16a is provided on the stem portion side of the rounded root portion 17, this loose portion The stress concentration on the root portion 17 can be relaxed at 16a, and delayed fracture can be prevented. Further, since the lightening portion 16a can be reduced in weight, it is possible to reduce the cost by reducing the material cost, to improve the fuel efficiency of the vehicle by reducing the weight, and to easily form the lightening portion 16a. Can do. In addition, since it is not necessary to increase the thickness of the bottom 8 of the mouse portion 7, further weight reduction can be achieved. Furthermore, it is possible to prevent the bottom portion 8 of the mouse portion 7 from interfering with the mating member facing the bottom portion 8 and to exhibit a stable function over a long period of time.

ぬすみ部１６ａを冷間鍛造成形にて形成した場合、コストの低減を図ることができる。   In the case where the relief portion 16a is formed by cold forging, the cost can be reduced.

前記ぬすみ部１６ａを、周方向に沿って連続的に形成すると、優れた応力集中の緩和の効力を発揮することになり、また、重量の低減を図ることもできる。   If the thinning portion 16a is continuously formed along the circumferential direction, the effect of relieving the excellent stress concentration can be exhibited, and the weight can be reduced.

次に、本発明の第２実施形態の等速自在継手の外側継手部材について説明する。この場合、図３に示すように、冷間鍛造成形にて、付根部１７のマウス部側に深さ寸法ｔ２のぬすみ部１６ｂを周方向に沿って連続的に形成している。すなわち、付根部１７のマウス部側が、マウス部７の底面１９よりも最大でｔ２だけ開口側となるように、付根部１７のマウス部側を切欠いている。このため、付根部１７のマウス部側には、曲率半径Ｒａのぬすみ部１６ｂが形成される。なお、ぬすみ部１６ｂを設けない場合の付根部１７を構成する曲率半径をＲｂとすると、Ｒａ＞Ｒｂとなる。なお、図３における仮想線は、ぬすみ部を設けない場合の付根部１７を示す。よって、ぬすみ部を設けない場合と比較して、付根アールの曲率半径を大きくすることができ、付根部にかかる応力を緩和することができる。   Next, the outer joint member of the constant velocity universal joint according to the second embodiment of the present invention will be described. In this case, as shown in FIG. 3, a thinning portion 16 b having a depth dimension t <b> 2 is continuously formed along the circumferential direction on the mouth portion side of the root portion 17 by cold forging. That is, the mouse portion side of the root portion 17 is notched so that the mouse portion side of the root portion 17 is at the maximum opening side by t2 from the bottom surface 19 of the mouse portion 7. For this reason, a thin portion 16b having a curvature radius Ra is formed on the mouth portion side of the root portion 17. Note that Ra> Rb, where Rb is the radius of curvature that forms the root portion 17 when the shading portion 16b is not provided. In addition, the phantom line in FIG. Therefore, the radius of curvature of the root radius can be increased and the stress applied to the root portion can be relieved compared to the case where the lightening portion is not provided.

次に、本発明の第３実施形態の等速自在継手の外側継手部材について説明する。この場合、図４に示すように、付根部１７のステム部側に深さ寸法ｔ１のぬすみ部１６ａを周方向に沿って連続的に形成するとともに、付根部１７のマウス部側に深さ寸法ｔ２のぬすみ部１６ｂを周方向に沿って連続的に形成している。なお、図４における仮想線は、ぬすみ部を設けない場合の付根部１７を示す。   Next, the outer joint member of the constant velocity universal joint according to the third embodiment of the present invention will be described. In this case, as shown in FIG. 4, a thinning portion 16 a having a depth dimension t <b> 1 is continuously formed along the circumferential direction on the stem portion side of the root portion 17, and the depth dimension on the mouth portion side of the root portion 17. The thin portion 16b of t2 is continuously formed along the circumferential direction. Note that the phantom lines in FIG. 4 indicate the root portion 17 when no shading portion is provided.

次に、本発明の第４実施形態の等速自在継手の外側継手部材について説明する。この場合、図５に示すように、付根部１７のステム部側とマウス部側の両方にまたがるコーナ部に、曲率半径Ｒａの球面の一部からなるぬすみ部１６ｃを周方向に沿って連続的に形成している。   Next, the outer joint member of the constant velocity universal joint according to the fourth embodiment of the present invention will be described. In this case, as shown in FIG. 5, a corner portion straddling both the stem portion side and the mouse portion side of the root portion 17 is continuously provided along the circumferential direction with a thin portion 16 c made of a part of a spherical surface having a curvature radius Ra. Is formed.

さらに、前記各実施形態において、図６に示すように外側継手部材の基端部１８ｂの外径面が、雄スプライン２１の凹部の底を結ぶ円弧の外径寸法とすることができる。また、図７に示すように、基端部１８ｃの外径面が、凸部２０の頂点３１よりも外径側であったりすることもできる。すなわち、嵌合部２１のマウス部側端部から、凹所３３が形成され、この凹所３３から外径面が凸部２０の先端部３１より外径側に位置する平面部（基端部１８ｃ）が形成されている。   Furthermore, in each said embodiment, as shown in FIG. 6, the outer-diameter surface of the base end part 18b of an outer joint member can be made into the outer-diameter dimension of the circular arc which ties the bottom of the recessed part of the male spline 21. FIG. Further, as shown in FIG. 7, the outer diameter surface of the base end portion 18 c may be on the outer diameter side with respect to the vertex 31 of the convex portion 20. That is, a recess 33 is formed from the end portion of the fitting portion 21 on the mouse portion side, and a flat surface portion (base end portion) from which the outer diameter surface is located on the outer diameter side of the distal end portion 31 of the convex portion 20. 18c) is formed.

このように、ぬすみ部１６ｂを付根部１７のマウス部側に設けたり、ぬすみ部１６ｃを付根部１７のステム部に設けたりすることができる。また、基端部１８の外径面の寸法も種々のものを用いることができる。これにより、相手部材の形状に応じて、相手部材と干渉しない位置にぬすみ部１６を設けたり、基端部１８の外径面の寸法を変更したりすることができる。このように、図３〜図７に示す実施形態においても、図２に示す実施形態と同様の作用効果を奏する。なお、図３〜図７に示す等速自在継手の外側継手部材において、図２の等速自在継手の外側継手部材と同様の構成については、図２と同一符号を付してその説明を省略する。   As described above, the thin portion 16 b can be provided on the mouth portion side of the root portion 17, and the thin portion 16 c can be provided on the stem portion of the root portion 17. Various dimensions can be used for the outer diameter surface of the base end portion 18. Thereby, depending on the shape of the mating member, the shading portion 16 can be provided at a position where it does not interfere with the mating member, or the dimension of the outer diameter surface of the base end portion 18 can be changed. Thus, also in the embodiment shown in FIGS. 3 to 7, the same operational effects as those of the embodiment shown in FIG. 2 are obtained. In the outer joint member of the constant velocity universal joint shown in FIGS. 3 to 7, the same components as those of the outer joint member of the constant velocity universal joint of FIG. To do.

また、図８に示すように、周方向に沿って断続的にぬすみ部１６ｄを形成してもよい。図８では、ぬすみ部１６ｄを所定ピッチで配設しているが、配設ピッチは任意に設定することができる。また、ぬすみ部１６ｄの大きさ、形状としても、種々設定することができる。   Moreover, as shown in FIG. 8, you may form the dull part 16d intermittently along the circumferential direction. In FIG. 8, the thinning portions 16d are arranged at a predetermined pitch, but the arrangement pitch can be arbitrarily set. Also, the size and shape of the dull portion 16d can be variously set.

前記各実施形態では、ぬすみ部１６ａ〜１６ｄを冷間鍛造成形にて仕上げたが、ぬすみ部１６ａ〜１６ｄを切削加工又は研削加工にて仕上げることもできる。   In each of the above embodiments, the thinning portions 16a to 16d are finished by cold forging, but the thinning portions 16a to 16d can be finished by cutting or grinding.

前記ぬすみ部１６ａ〜１６ｄに、熱処理硬化層を形成することができる。外側継手部材を中炭素鋼にて構成した場合に高周波熱処理による熱処理硬化層を形成したり、外側継手部材を浸炭鋼にて構成した場合に浸炭熱処理による熱処理硬化層を形成したりして、付根部１７の硬度を大とすることができる。   A heat treatment hardened layer can be formed on the thinning portions 16a to 16d. When the outer joint member is made of medium carbon steel, a heat treatment hardened layer by induction heat treatment is formed.When the outer joint member is made of carburized steel, a heat treatment hardened layer is formed by carburizing heat treatment. The hardness of the root portion 17 can be increased.

前記ぬすみ部１６ａ〜１６ｄに、表面加工手段にて圧縮残留応力を付与することができる。ここで、表面加工手段としては、例えば、ショットピーニング処理がある。ショットピーニングとは、無数のショット材を金属表面にたたきつけるもので、金属表面改質法の一種である。これにより、金属表面の高度が増し、一定の深さで圧縮応力を持った層が形成される。ぬすみ部１６ａ〜１６ｄにショットピーング処理を行うと、ぬすみ部１６ａ〜１６ｄに圧縮の残留応力が発生し、それがぬすみ部１６ａ〜１６ｄに発生した引張応力を打ち消すことができる。ショットピーニング以外にレーザーピーニングや超音波打撃処理を行うことにより、圧縮残留応力を付与することもできる。   A compressive residual stress can be applied to the thinning portions 16a to 16d by surface processing means. Here, as the surface processing means, for example, there is a shot peening process. Shot peening is a type of metal surface modification method that strikes countless shot materials against the metal surface. Thereby, the height of the metal surface is increased, and a layer having a compressive stress is formed at a certain depth. When shot peening is performed on the thinning portions 16a to 16d, compressive residual stress is generated in the thinning portions 16a to 16d, which can cancel the tensile stress generated in the thinning portions 16a to 16d. In addition to shot peening, compressive residual stress can be applied by performing laser peening or ultrasonic hitting treatment.

以上、本発明の実施形態につき説明したが、本発明は前記実施形態に限定されることなく種々の変形が可能であって、例えば、固定式等速自在継手としては、種々のタイプのものを採用することができ、また、固定式等速自在継手に限らず種々のタイプの摺動式等速自在継手であってもよく、ハブボルト等を締め付けることでステム部１０に軸力が発生し、付根部１７に大きな応力が発生する外側継手部材１であればよい。また、基端部１８の外径面としては、凸部２０の先端部３１と略同一であってもよい。ぬすみ部１６の深さ、大きさとしては、外側継手部材１の形状や材質等に応じて種々変更することができる。   As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, various types of fixed type constant velocity universal joints can be used. In addition to the fixed type constant velocity universal joint, various types of sliding type constant velocity universal joints may be used, and axial force is generated in the stem portion 10 by tightening a hub bolt or the like. What is necessary is just the outer joint member 1 which a big stress generate | occur | produces in the root part 17. Further, the outer diameter surface of the proximal end portion 18 may be substantially the same as the distal end portion 31 of the convex portion 20. The depth and size of the relief portion 16 can be variously changed according to the shape and material of the outer joint member 1.

本発明の第１実施形態を示す外側継手部材を使用した等速自在継手の断面図である。It is sectional drawing of the constant velocity universal joint which uses the outer joint member which shows 1st Embodiment of this invention. 前記図１の外側継手部材の要部拡大断面図である。It is a principal part expanded sectional view of the outer joint member of the said FIG. 本発明の第２実施形態を示す外側継手部材の要部拡大断面図である。It is a principal part expanded sectional view of the outer joint member which shows 2nd Embodiment of this invention. 本発明の第３実施形態を示す外側継手部材の要部拡大断面図である。It is a principal part expanded sectional view of the outer joint member which shows 3rd Embodiment of this invention. 本発明の第４実施形態を示す外側継手部材の要部拡大断面図である。It is a principal part expanded sectional view of the outer joint member which shows 4th Embodiment of this invention. 本発明の第５実施形態を示す外側継手部材の要部拡大断面図である。It is a principal part expanded sectional view of the outer joint member which shows 5th Embodiment of this invention. 本発明の第６実施形態を示す外側継手部材の要部拡大断面図である。It is a principal part expanded sectional view of the outer joint member which shows 6th Embodiment of this invention. 本発明の第７実施形態を示す外側継手部材の斜視図である。It is a perspective view of the outer joint member which shows 7th Embodiment of this invention. 従来の外側継手部材を使用した駆動車輪用軸受ユニットの断面図である。It is sectional drawing of the bearing unit for drive wheels which uses the conventional outer joint member.

符号の説明Explanation of symbols

１ 外側継手部材
２ 内側継手部材
７ マウス部
８ 底部
１０ ステム部
１６ ぬすみ部
１７ 付根部 DESCRIPTION OF SYMBOLS 1 Outer joint member 2 Inner joint member 7 Mouse | mouth part 8 Bottom part 10 Stem part 16 Loose part 17 Root part

Claims (10)

内側継手部材が収容されるマウス部と、マウス部の底部から突設されるステム部とを有し、ステム部とマウス部とのコーナ部である付根部がアール状とされた等速自在継手の外側継手部材であって、
アール状の付根部のステム部側に応力緩和用凹窪ぬすみ部を形成したことを特徴とする等速自在継手の外側継手部材。 A constant velocity universal joint having a mouth portion in which the inner joint member is accommodated and a stem portion protruding from the bottom portion of the mouse portion, and a root portion that is a corner portion of the stem portion and the mouse portion is rounded. An outer joint member of
An outer joint member of a constant velocity universal joint, characterized in that a concave relief hollow portion for stress relaxation is formed on the stem portion side of the rounded root portion. 内側継手部材が収容されるマウス部と、マウス部の底部から突設されるステム部とを有し、ステム部とマウス部とのコーナ部である付根部がアール状とされた等速自在継手の外側継手部材であって、
アール状の付根部のマウス部側に応力緩和用凹窪ぬすみ部を形成したことを特徴とする等速自在継手の外側継手部材。 A constant velocity universal joint having a mouth portion in which the inner joint member is accommodated and a stem portion protruding from the bottom portion of the mouse portion, and a root portion that is a corner portion of the stem portion and the mouse portion is rounded. An outer joint member of
An outer joint member of a constant velocity universal joint, wherein a recessed portion for stress relaxation is formed on the mouth portion side of the rounded root portion. 内側継手部材が収容されるマウス部と、マウス部の底部から突設されるステム部とを有し、ステム部とマウス部とのコーナ部である付根部がアール状とされた等速自在継手の外側継手部材であって、
アール状の付根部のステム部側とマウス部側の両方に応力緩和用凹窪ぬすみ部を形成したことを特徴とする等速自在継手の外側継手部材。 A constant velocity universal joint having a mouth portion in which the inner joint member is accommodated and a stem portion protruding from the bottom portion of the mouse portion, and a root portion that is a corner portion of the stem portion and the mouse portion is rounded. An outer joint member of
An outer joint member of a constant velocity universal joint, wherein a concave relief hollow portion for stress relaxation is formed on both a stem portion side and a mouse portion side of a rounded root portion. 中炭素鋼にて構成され、前記応力緩和用凹窪ぬすみ部に高周波熱処理による熱処理硬化層が形成されたことを特徴とする請求項１〜請求項３のいずれか１項の等速自在継手の外側継手部材。   The constant velocity universal joint according to any one of claims 1 to 3, wherein the constant velocity universal joint according to any one of claims 1 to 3, wherein the constant velocity universal joint is formed of medium carbon steel and has a heat treatment hardened layer formed by induction heat treatment in the recessed hollow portion for stress relaxation. Outer joint member. 浸炭鋼にて構成され、前記応力緩和用凹窪ぬすみ部に浸炭熱処理による熱処理硬化層が形成されたことを特徴とする請求項１〜請求項３のいずれか１項の等速自在継手の外側継手部材。   The outer side of the constant velocity universal joint according to any one of claims 1 to 3, wherein the outer wall of the constant velocity universal joint according to any one of claims 1 to 3, wherein the outer wall of the constant velocity universal joint is formed of carburized steel, and a heat-treated hardened layer is formed by carburizing heat treatment in the recessed hollow portion for stress relaxation. Joint member. 前記応力緩和用凹窪ぬすみ部を冷間鍛造成形にて成形したことを特徴とする請求項１〜請求項３のいずれか１項の等速自在継手の外側継手部材。   The outer joint member of a constant velocity universal joint according to any one of claims 1 to 3, wherein the stress relief recess hollow portion is formed by cold forging. 前記応力緩和用凹窪ぬすみ部を切削加工又は研削加工にて成形したことを特徴とする請求項１〜請求項３のいずれか１項の等速自在継手の外側継手部材。   The outer joint member of the constant velocity universal joint according to any one of claims 1 to 3, wherein the stress relief recessed hollow portion is formed by cutting or grinding. 前記応力緩和用凹窪ぬすみ部を、周方向に沿って連続的に形成したことを特徴とする請求項１〜請求項７のいずれか１項の等速自在継手の外側継手部材。   The outer joint member of the constant velocity universal joint according to any one of claims 1 to 7, wherein the stress relief recessed hollow portion is continuously formed along a circumferential direction. 前記応力緩和用凹窪ぬすみ部を、周方向に沿って断続的に形成したことを特徴とする請求項１〜請求項７のいずれか１項の等速自在継手の外側継手部材。   The outer joint member of a constant velocity universal joint according to any one of claims 1 to 7, wherein the stress relief recessed hollow portion is formed intermittently along a circumferential direction. 前記応力緩和用凹窪ぬすみ部に表面加工手段にて圧縮残留応力を付与することを特徴とする請求項１〜請求項９のいずれか１項の等速自在継手の外側継手部材。   The outer joint member of a constant velocity universal joint according to any one of claims 1 to 9, wherein compressive residual stress is applied to the concave relief hollow portion for stress relaxation by surface processing means.
JP2008111463A 2008-04-22 2008-04-22 Outside joint member of constant velocity universal joint Withdrawn JP2009264418A (en)

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PCT/JP2009/056857 WO2009130982A1 (en) 2008-04-22 2009-04-02 Outer joint member for constant velocity universal joint

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015021596A (en) * 2013-07-23 2015-02-02 日本精工株式会社 Yoke for universal joint
JP2018035907A (en) * 2016-09-01 2018-03-08 Ntn株式会社 Bearing device for wheel and method for manufacturing same

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JPS5974226A (en) * 1982-10-19 1984-04-26 Toyota Motor Corp Method for carrying out high frequency tempering of carburized member
JPH01182625A (en) * 1988-01-14 1989-07-20 Toyota Motor Corp Part of equal velocity joint for vehicle
JPH02278005A (en) * 1989-04-18 1990-11-14 Nissan Motor Co Ltd High strength bolt
JP2005147367A (en) * 2003-11-19 2005-06-09 Ntn Corp Power transmission shaft
JP4633575B2 (en) * 2005-08-18 2011-02-16 トヨタ自動車株式会社 Stabilizer bush
JP2007138192A (en) * 2005-11-15 2007-06-07 Toyota Motor Corp Method for joining parts
JP2008064294A (en) * 2006-09-11 2008-03-21 Ntn Corp Fixed type constant velocity universal joint

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015021596A (en) * 2013-07-23 2015-02-02 日本精工株式会社 Yoke for universal joint
JP2018035907A (en) * 2016-09-01 2018-03-08 Ntn株式会社 Bearing device for wheel and method for manufacturing same
JP7021844B2 (en) 2016-09-01 2022-02-17 Ntn株式会社 Wheel bearing equipment and its manufacturing method

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