JP2008082350A - Wheel rolling bearing device - Google Patents

Wheel rolling bearing device Download PDF

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Publication number
JP2008082350A
JP2008082350A JP2006259690A JP2006259690A JP2008082350A JP 2008082350 A JP2008082350 A JP 2008082350A JP 2006259690 A JP2006259690 A JP 2006259690A JP 2006259690 A JP2006259690 A JP 2006259690A JP 2008082350 A JP2008082350 A JP 2008082350A
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Prior art keywords
shaft
caulking
drive shaft
rolling bearing
inner ring
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JP2006259690A
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Japanese (ja)
Inventor
淑人 ▲高▼田
Yoshito Takada
Katsuyuki Harada
勝之 原田
Masao Takimoto
将生 滝本
Seiji Yamamoto
誠司 山本
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JTEKT Corp
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JTEKT Corp
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Priority to JP2006259690A priority Critical patent/JP2008082350A/en
Publication of JP2008082350A publication Critical patent/JP2008082350A/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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/527—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to vibration and noise
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • F16C35/0635—Fixing them on the shaft the bore of the inner ring being of special non-cylindrical shape which co-operates with a complementary shape on the shaft, e.g. teeth, polygonal sections

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel rolling bearing device carrying out joining of a drive shaft and an inner shaft by preventing a calking part for fixing an inner wheel from becoming an abutting face, and capable of positively carrying out shaft end calking. <P>SOLUTION: An end face 37a of a protruding part 37 formed on the drive shaft 30 is abutted on a side face 26 in an inner side of the inner ring 21 to carry out joining of the inner shaft 10 and the drive shaft 30 in an axial direction. By this, an inner side end face 15a of the calking part 15 is prevented from becoming the contact face with the drive shaft 30. The protruding part 37 of the drive shaft 30 is formed protruding more to an outer side than the inner side end face 15a of the calking part 15. By this, a need to provide a shape such as a protruding face on the side face of the inner ring 21 is eliminated, and when carrying out shaft end calking, constraints in rocking space of a calking tool or a shape of the calking part are eliminated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、主として自動車に用いられる車輪用転がり軸受装置に関するものである。   The present invention relates to a rolling bearing device for a wheel mainly used in an automobile.

従来、駆動輪を支持する車輪用転がり軸受装置として、エンジンに接続された駆動軸を、車輪が取り付けられる内軸の中心に形成されたスプライン孔に結合し、駆動軸と内軸とを一体的に回転させるようにしたものが知られている。こうした車輪用転がり軸受装置としては、特許文献１に示されるように、転がり軸受の内輪が内軸の外周に嵌合され、内軸のインナー側（車輪が取り付けられる側の反対側）の軸端を径方向外方にかしめ広げる（以下、このかしめを軸端かしめという）ことで形成されたかしめ部により、内輪を固定するようにしたものがある。このような車輪用転がり軸受装置では、駆動軸が、スプライン孔に挿入される軸部よりインナー側に大径部を有する。そして、その大径部のアウター側（車輪が取り付けられる側）の側面とかしめ部のインナー側の側面とを当接させ、駆動軸のアウター側先端に設けられたねじ部にナットを螺合することで、駆動軸を内軸に対してアウター側に押圧し、内軸と駆動軸との軸方向の結合が行われている。   Conventionally, as a wheel rolling bearing device for supporting a drive wheel, a drive shaft connected to an engine is coupled to a spline hole formed at the center of the inner shaft to which the wheel is attached, and the drive shaft and the inner shaft are integrated. It is known that it is made to rotate. As such a wheel rolling bearing device, as shown in Patent Document 1, the inner ring of the rolling bearing is fitted to the outer periphery of the inner shaft, and the shaft end on the inner side of the inner shaft (the side opposite to the side on which the wheel is attached). There is a type in which the inner ring is fixed by a caulking portion formed by caulking outward in the radial direction (hereinafter, caulking is referred to as shaft end caulking). In such a wheel rolling bearing device, the drive shaft has a larger diameter portion on the inner side than the shaft portion inserted into the spline hole. Then, the side surface on the outer side (the side on which the wheel is attached) of the large diameter portion and the inner side surface of the caulking portion are brought into contact with each other, and a nut is screwed into a screw portion provided at the outer end of the drive shaft. Thus, the drive shaft is pressed to the outer side with respect to the inner shaft, and the inner shaft and the drive shaft are coupled in the axial direction.

ところで、駆動軸と当接するかしめ部には、駆動軸と内軸との結合状態で軸ぶれ等を抑えるために、高い寸法精度が要求されている。しかしながら、内軸の軸端かしめは、かしめ治具を揺動させることで軸端を径方向外方に塑性変形させるように行われるため、かしめ部の寸法精度を確保することが困難となっている。そこで、特許文献２に示されるように、かしめ部を当接面として利用せずに構成した車輪用転がり軸受装置が提案されている。   By the way, a high dimensional accuracy is required for the caulking portion that comes into contact with the drive shaft in order to suppress shaft shake and the like in a coupled state of the drive shaft and the inner shaft. However, since the shaft end caulking of the inner shaft is performed so as to plastically deform the shaft end radially outward by swinging the caulking jig, it is difficult to ensure the dimensional accuracy of the caulking portion. Yes. Therefore, as shown in Patent Document 2, a rolling bearing device for a wheel configured without using a caulking portion as a contact surface has been proposed.

図２は特許文献２に係る車輪用転がり軸受装置の構成図である。内輪１０１は、内周に段部１０１ａが形成されており、その段部１０１ａが内軸１０２のかしめ部１０２ａにより押さえ付けられることで、内軸１０２に対して固定されている。内輪１０１のインナー側には、内軸１０２のかしめ部１０２ａよりも突出する突出部１０１ｂが形成されている。そして、突出部１０１ｂのインナー側の側面１０１ｃは、駆動軸１０３のアウター側の側面１０３ａと当接している。このため、かしめ部１０２ａのインナー側の側面１０２ｂが当接面となることを回避することができ、かしめ部１０２ａの寸法精度を確保する必要がなくなる。また、内輪１０１のインナー側の側面１０１ｃは精度よく加工が施されているため、駆動軸１０３と内軸１０２との結合の際に軸ぶれ等を抑えることができる。このようにして、内輪１０１の突出部１０１ｂと駆動軸１０３とを当接させることにより、かしめ部１０２ａの寸法ばらつきに起因する悪影響を排除し、かしめ部１０２ａの寸法精度を緩和するようにしている。
特開２００２−２１８５８号公報 特開２００６−５１９４６号公報 FIG. 2 is a configuration diagram of a wheel rolling bearing device according to Patent Document 2. As shown in FIG. The inner ring 101 has a step portion 101 a formed on the inner periphery, and the step portion 101 a is fixed to the inner shaft 102 by being pressed by a caulking portion 102 a of the inner shaft 102. On the inner side of the inner ring 101, a protruding portion 101b that protrudes from the caulking portion 102a of the inner shaft 102 is formed. The inner side surface 101 c of the protruding portion 101 b is in contact with the outer side surface 103 a of the drive shaft 103. For this reason, it can avoid that the side surface 102b of the inner side of the crimping part 102a becomes a contact surface, and it becomes unnecessary to ensure the dimensional accuracy of the crimping part 102a. In addition, since the inner side surface 101c of the inner ring 101 is processed with high accuracy, it is possible to suppress shaft shake or the like when the drive shaft 103 and the inner shaft 102 are coupled. In this way, by bringing the protruding portion 101b of the inner ring 101 into contact with the drive shaft 103, adverse effects due to dimensional variations of the caulking portion 102a are eliminated, and the dimensional accuracy of the caulking portion 102a is relaxed. .
JP 2002-21858 A JP 2006-51946 A

ところで、特許文献２に示されるような車輪用転がり軸受装置では、内軸１０２のかしめ部１０２ａの外周１０２ｃと、内輪１０１の突出部１０１ｂの内周１０１ｄとの隙間が狭くなるように構成されてしまう。このため、軸端かしめによってかしめ部１０２ａを形成する際に、かしめ治具の揺動スペースやかしめ部１０２ａの形状に制約が与えられることになり、かしめ部１０２ａによる内輪１０１の固定が不安定になるおそれがある。一方、外周１０２ｃと内周１０１ｄとの隙間を大きく確保すると、内輪１０１又は内軸１０２の強度不足や、軸受装置の径方向の大型化を招くおそれがある。   By the way, in the rolling bearing device for a wheel as shown in Patent Document 2, the gap between the outer periphery 102c of the caulking portion 102a of the inner shaft 102 and the inner periphery 101d of the protruding portion 101b of the inner ring 101 is configured to be narrow. End up. For this reason, when the caulking portion 102a is formed by caulking at the shaft end, restrictions are imposed on the rocking space of the caulking jig and the shape of the caulking portion 102a, and the fixing of the inner ring 101 by the caulking portion 102a becomes unstable. There is a risk. On the other hand, if a large gap between the outer periphery 102c and the inner periphery 101d is secured, there is a risk of insufficient strength of the inner ring 101 or the inner shaft 102 or an increase in the radial size of the bearing device.

本発明は、こうした実情に鑑みてなされたものであり、その目的は、内輪を固定するためのかしめ部が当接面となることを回避して駆動軸と内軸との結合を行うとともに、軸端かしめを確実に実行することができる車輪用転がり軸受装置を提供することにある。   The present invention has been made in view of such circumstances, and the purpose thereof is to couple the drive shaft and the inner shaft while avoiding the caulking portion for fixing the inner ring from being a contact surface, It is an object of the present invention to provide a wheel rolling bearing device capable of reliably performing shaft end caulking.

上記目的を達成するため、請求項１に記載の発明は、車輪が取り付けられる円筒状の内軸と、内軸の外周に嵌合され、内軸のインナー側軸端を径方向外方にかしめ広げることで形成されたかしめ部により固定される転がり軸受の内輪と、内軸の中心に形成されたスプライン孔に挿入される駆動軸とを備えた車輪用転がり軸受装置において、前記駆動軸は、前記スプライン孔に挿入される軸部よりインナー側に大径部を有し、前記大径部は、アウター側の側面から前記かしめ部のインナー側端面よりも軸方向に突出して形成され、前記内輪のインナー側の側面に当接する突出部を有することをその要旨としている。   In order to achieve the above-mentioned object, the invention according to claim 1 is fitted to a cylindrical inner shaft to which a wheel is attached and an outer periphery of the inner shaft, and the inner side shaft end of the inner shaft is caulked radially outward. In a rolling bearing device for a wheel comprising an inner ring of a rolling bearing fixed by a caulking portion formed by spreading and a driving shaft inserted into a spline hole formed at the center of the inner shaft, the driving shaft includes: An inner diameter side of the shaft portion inserted into the spline hole has a large diameter portion, and the large diameter portion is formed so as to protrude in an axial direction from an inner side surface of the caulking portion from an outer side surface, and the inner ring The gist of the invention is to have a protruding portion that contacts the side surface on the inner side.

同構成によれば、駆動軸は、内軸のスプライン孔に挿入される軸部よりインナー側に大径部を有し、大径部のアウター側の側面からかしめ部のインナー側端面よりも軸方向に突出して形成された突出部が、内輪のインナー側の側面に当接して軸方向に結合される。このように、駆動軸に形成された突出部が内輪のインナー側の側面と当接するように構成すると、かしめ部のインナー側の側面が駆動軸との当接面となることを回避することができ、かしめ部の寸法精度を確保する必要がなくなる。このため、かしめ部の寸法精度を確保するために必要なかしめ治具の設定やかしめ部の２次加工等を不要とすることができる。また、内輪のインナー側の側面は一般的に精度の高い平面になっているため、当接面における面圧が局部的に上昇してしまうことを抑えることができ、当接面間にねじりトルクが作用するような場合に、スティックスリップ現象によって発生する異音の音圧レベルを低減することができる。   According to this configuration, the drive shaft has a larger diameter portion on the inner side than the shaft portion that is inserted into the spline hole of the inner shaft, and the shaft from the outer side surface of the large diameter portion to the inner side end surface of the caulking portion. A projecting portion that projects in the direction abuts against the inner side surface of the inner ring and is coupled in the axial direction. In this way, when the protruding portion formed on the drive shaft is configured to contact the inner side surface of the inner ring, it is possible to avoid the inner side surface of the caulking portion from being a contact surface with the drive shaft. This eliminates the need to ensure the dimensional accuracy of the caulking portion. For this reason, the setting of the caulking jig necessary for securing the dimensional accuracy of the caulking portion, the secondary processing of the caulking portion, and the like can be eliminated. Moreover, since the inner side surface of the inner ring is generally a highly accurate flat surface, it is possible to prevent the surface pressure at the contact surfaces from rising locally, and torsional torque between the contact surfaces. In such a case, the sound pressure level of abnormal noise generated by the stick-slip phenomenon can be reduced.

また、駆動軸の突出部は、大径部のアウター側の側面からかしめ部のインナー側端面よりも軸方向に突出して形成されるため、突出部が当接する内輪のインナー側の側面に特別な形状を設けておく必要がなくなる。このため、軸端かしめにより内輪を固定する際に、かしめ治具の揺動スペースやかしめ部の形状に制約が与えられることを防止して、かしめ部によって確実に内輪が固定されるように軸端かしめを実行することができる。   Further, since the protruding portion of the drive shaft is formed to protrude from the side surface on the outer side of the large-diameter portion in the axial direction from the inner side end surface of the caulking portion, a special portion is provided on the inner side surface of the inner ring with which the protruding portion abuts. There is no need to provide a shape. For this reason, when the inner ring is fixed by caulking at the shaft end, it is possible to prevent the swaging space of the caulking jig and the shape of the caulking part from being restricted, so that the inner ring is securely fixed by the caulking part. Edge caulking can be performed.

請求項２に記載の発明は、請求項１に記載の車輪用転がり軸受装置において、前記突出部が当接する内輪のインナー側の側面は、前記かしめ部により押さえ付けられる面と同一面であることをその要旨としている。   According to a second aspect of the present invention, in the rolling bearing device for a wheel according to the first aspect, the side surface on the inner side of the inner ring with which the protruding portion abuts is the same surface as the surface pressed by the caulking portion. Is the gist.

同構成によれば、駆動軸の突出部が当接する内輪のインナー側の側面は、かしめ部により押さえ付けられる面と同一面であるため、内輪の形状を簡素化することができ、製造工程の削減や低コスト化を図ることができる。   According to this configuration, since the inner side surface of the inner ring with which the projecting portion of the drive shaft abuts is the same surface as the surface pressed by the caulking portion, the shape of the inner ring can be simplified, and the manufacturing process can be simplified. Reduction and cost reduction can be achieved.

本発明によれば、内軸と駆動軸との結合時に、駆動軸に形成された突出部が内輪のインナー側の側面と当接するように構成されるため、かしめ部のインナー側の側面が駆動軸との当接面となることを回避することができ、かしめ部の寸法精度を確保する必要がなくなる。また、駆動軸の突出部は、大径部のアウター側の側面からかしめ部のインナー側端面よりも軸方向に突出して形成されるため、軸端かしめを行う際に、かしめ治具の揺動スペースやかしめ部の形状に制約が与えられることを防止することができる。   According to the present invention, when the inner shaft and the drive shaft are coupled, the protrusion formed on the drive shaft is configured to come into contact with the inner side surface of the inner ring, so that the inner side surface of the caulking portion is driven. The contact surface with the shaft can be avoided, and it is not necessary to ensure the dimensional accuracy of the caulking portion. Further, since the protruding portion of the drive shaft is formed so as to protrude in the axial direction from the outer side surface of the large diameter portion than the inner side end surface of the caulking portion, the swaging of the caulking jig is performed when caulking the shaft end. It is possible to prevent the space and the shape of the caulking portion from being restricted.

以下、図１を参照して、本発明に係る車輪用転がり軸受装置を具体化した一実施形態について説明する。図１は車輪用転がり軸受装置１の縦断面図である。車輪用転がり軸受装置１は、内軸１０と、転がり軸受２０と、駆動軸３０とを備えている。   Hereinafter, with reference to FIG. 1, one Embodiment which actualized the rolling bearing device for wheels which concerns on this invention is described. FIG. 1 is a longitudinal sectional view of a wheel rolling bearing device 1. The wheel rolling bearing device 1 includes an inner shaft 10, a rolling bearing 20, and a drive shaft 30.

内軸１０は、円筒状に形成され、中心にスプライン孔１１が形成された円筒軸部１２と、円筒軸部１２のアウター側端部に径方向外方に延びるように形成された円環状のフランジ部１３とを有している。フランジ部１３には、図示しない車輪のホイールがボルト１４により締結されている。   The inner shaft 10 is formed in a cylindrical shape, and a cylindrical shaft portion 12 having a spline hole 11 formed at the center, and an annular shape formed to extend radially outward at an outer side end portion of the cylindrical shaft portion 12. And a flange portion 13. A wheel of a wheel (not shown) is fastened to the flange portion 13 by a bolt 14.

転がり軸受２０は、複列のアンギュラ玉軸受であり、内軸１０の円筒軸部１２の外周面に取り付けられる。転がり軸受２０は、内輪２１と、外輪２２と、複列の転動体としてインナー側及びアウター側に配列された玉２３，２４と、インナー側及びアウター側に配置されたシール部材２５とを有する。   The rolling bearing 20 is a double-row angular ball bearing and is attached to the outer peripheral surface of the cylindrical shaft portion 12 of the inner shaft 10. The rolling bearing 20 includes an inner ring 21, an outer ring 22, balls 23 and 24 arranged on the inner side and the outer side as double row rolling elements, and a seal member 25 arranged on the inner side and the outer side.

内輪２１は、内軸１０の円筒軸部１２の外周に嵌合され、内軸１０のインナー側軸端を径方向外方にかしめ広げることで形成されたかしめ部１５が、内輪２１のインナー側の側面２６を押さえ付けることで固定されている。軸端かしめは、内輪２１の内周面２７を円筒軸部１２の外周面１６と嵌合させて、内輪２１のアウター側の側面２８を円筒軸部１２の段差部側面１７と当接させた状態で、円筒軸部１２のインナー側からかしめ治具を押し付けることで行われる。これにより、内輪２１を内軸１０に対して確実に固定するとともに、内輪２１に適切な予圧を与えている。内輪２１の外周には、インナー側の玉２３の軌道面である第１軌道２１ａが形成されている。また、円筒軸部１２のフランジ部１３側の外周には、アウター側の玉２４の軌道面である第２軌道１２ａが形成されている。   The inner ring 21 is fitted to the outer periphery of the cylindrical shaft portion 12 of the inner shaft 10, and the caulking portion 15 formed by caulking the inner side shaft end of the inner shaft 10 radially outward is formed on the inner side of the inner ring 21. It is being fixed by pressing down the side surface 26. For the shaft end caulking, the inner peripheral surface 27 of the inner ring 21 is fitted to the outer peripheral surface 16 of the cylindrical shaft portion 12, and the outer side surface 28 of the inner ring 21 is brought into contact with the stepped portion side surface 17 of the cylindrical shaft portion 12. In this state, the crimping jig is pressed from the inner side of the cylindrical shaft portion 12. Thus, the inner ring 21 is securely fixed to the inner shaft 10 and an appropriate preload is applied to the inner ring 21. On the outer periphery of the inner ring 21, a first track 21 a that is a track surface of the ball 23 on the inner side is formed. A second raceway 12 a that is a raceway surface of the outer-side ball 24 is formed on the outer periphery of the cylindrical shaft portion 12 on the flange portion 13 side.

一方、外輪２２は、第１軌道２１ａに対向する第１外輪軌道２２ａと、第２軌道１２ａに対向する第２外輪軌道２２ｂとを有する。また、外輪２２の外周面には、径方向外側に延びるフランジ部２９が設けられている。このフランジ部２９は図示しない車体の懸架装置に取り付けられている。そして、インナー側の玉２３が、第１軌道２１ａと第１外輪軌道２２ａとの間に配置され、アウター側の玉２４が、第２軌道１２ａと第２外輪軌道２２ｂとの間に配置される。シール部材２５は、外輪２２の両側部と内輪２１及び円筒軸部１２との間に介在し、車両の走行に伴い、泥水、砂利、小石等の異物が、外輪２２と内輪２１及び円筒軸部１２との隙間から転がり軸受２０の内部に侵入することを防止している。   On the other hand, the outer ring 22 has a first outer ring raceway 22a facing the first track 21a and a second outer ring raceway 22b facing the second track 12a. Further, a flange portion 29 extending radially outward is provided on the outer peripheral surface of the outer ring 22. The flange portion 29 is attached to a vehicle suspension system (not shown). The inner ball 23 is disposed between the first track 21a and the first outer ring track 22a, and the outer ball 24 is disposed between the second track 12a and the second outer ring track 22b. . The seal member 25 is interposed between both side portions of the outer ring 22 and the inner ring 21 and the cylindrical shaft portion 12, and foreign matters such as muddy water, gravel, and pebbles are removed from the outer ring 22, the inner ring 21, and the cylindrical shaft portion as the vehicle travels. Intrusion into the inside of the rolling bearing 20 from the gap with the terminal 12 is prevented.

駆動軸３０は、図示しない等速ジョイント及び差動装置を介してエンジンに接続されており、エンジンの出力回転が伝達される。駆動軸３０は、内軸１０のスプライン孔１１に挿入される軸部３１と、軸部３１よりインナー側に形成された大径部３２とを有する。軸部３１は、外周にスプライン部３３が形成されるとともに、アウター側の先端にねじ部３４が形成されている。大径部３２は、アウター側の側面３６からかしめ部１５のインナー側端面１５ａよりも軸方向に突出して形成される突出部３７を有する。突出部３７は、円筒状に形成され、アウター側の端面３７ａの全周が、内輪２１のインナー側の側面２６に当接している。   The drive shaft 30 is connected to the engine via a constant velocity joint and a differential device (not shown), and the output rotation of the engine is transmitted. The drive shaft 30 includes a shaft portion 31 inserted into the spline hole 11 of the inner shaft 10 and a large diameter portion 32 formed on the inner side of the shaft portion 31. The shaft portion 31 has a spline portion 33 formed on the outer periphery and a screw portion 34 formed on the outer end. The large-diameter portion 32 has a protruding portion 37 that is formed so as to protrude in the axial direction from the inner side end surface 15 a of the caulking portion 15 from the outer side surface 36. The protruding portion 37 is formed in a cylindrical shape, and the entire circumference of the outer end surface 37 a is in contact with the inner side surface 26 of the inner ring 21.

このように構成される車輪用転がり軸受装置１において、内軸１０と駆動軸３０とは以下のように結合される。駆動軸３０の軸部３１を内軸１０のスプライン孔１１に挿入することで、軸部３１のスプライン部３３とスプライン孔１１とをスプライン係合させ、内軸１０と駆動軸３０との回転方向の結合が行われる。また、駆動軸３０の突出部３７のアウター側の端面３７ａを内輪２１のインナー側の側面２６に当接させ、駆動軸３０のねじ部３４にナット３５を螺合することで駆動軸３０を内軸１０に対してアウター側に押圧し、内軸１０と駆動軸３０との軸方向の結合が行われる。このように内軸１０と駆動軸３０とが結合されることにより、内軸１０と駆動軸３０とが一体的に回転し、駆動軸３０の駆動力が車輪に伝達される。   In the wheel rolling bearing device 1 configured as described above, the inner shaft 10 and the drive shaft 30 are coupled as follows. By inserting the shaft portion 31 of the drive shaft 30 into the spline hole 11 of the inner shaft 10, the spline portion 33 of the shaft portion 31 and the spline hole 11 are spline-engaged, and the rotation direction of the inner shaft 10 and the drive shaft 30 is Are combined. Further, the outer end surface 37 a of the projecting portion 37 of the drive shaft 30 is brought into contact with the inner side surface 26 of the inner ring 21, and the nut 35 is screwed into the screw portion 34 of the drive shaft 30, so that the drive shaft 30 is The shaft 10 is pressed toward the outer side, and the inner shaft 10 and the drive shaft 30 are coupled in the axial direction. As the inner shaft 10 and the drive shaft 30 are coupled in this manner, the inner shaft 10 and the drive shaft 30 rotate integrally, and the driving force of the drive shaft 30 is transmitted to the wheels.

上記実施形態の車輪用転がり軸受装置１によれば、以下のような効果を得ることができる。
（１）上記実施形態では、駆動軸３０に形成された突出部３７の端面３７ａを内輪２１のインナー側の側面２６に当接させて、内軸１０と駆動軸３０との軸方向の結合を行っているため、従来のようにかしめ部１５のインナー側端面１５ａが駆動軸３０との当接面となることを回避することができ、かしめ部１５の寸法精度を確保する必要がなくなる。このため、かしめ部１５のインナー側端面１５ａの寸法精度を確保するために必要なかしめ治具の設定やインナー側端面１５ａの２次加工等を不要とすることができ、軸端かしめの工程の簡素化や製造コストの削減を図ることができる。 According to the wheel rolling bearing device 1 of the above embodiment, the following effects can be obtained.
(1) In the above-described embodiment, the end surface 37 a of the protrusion 37 formed on the drive shaft 30 is brought into contact with the inner side surface 26 of the inner ring 21, thereby coupling the inner shaft 10 and the drive shaft 30 in the axial direction. Therefore, it is possible to avoid the inner side end surface 15a of the caulking portion 15 from being a contact surface with the drive shaft 30 as in the prior art, and it is not necessary to ensure the dimensional accuracy of the caulking portion 15. For this reason, the setting of the caulking jig necessary for ensuring the dimensional accuracy of the inner side end face 15a of the caulking portion 15 and the secondary processing of the inner side end face 15a can be made unnecessary. Simplification and reduction of manufacturing costs can be achieved.

（２）上記実施形態では、駆動軸３０の突出部３７は、大径部３２のアウター側の側面３６からかしめ部１５のインナー側端面１５ａよりも軸方向に突出して形成されるため、突出部３７の端面３７ａが当接する内輪２１のインナー側の側面２６に、突出面等の特別な形状を設けておく必要がなくなる。このため、軸端かしめにより内輪２１を固定する際に、前記特別な形状によってかしめ治具の揺動スペースやかしめ部１５の形状に制約が与えられることを防止することができ、かしめ部１５によって確実に内輪２１が固定されるように軸端かしめを実行することができる。   (2) In the above embodiment, the protrusion 37 of the drive shaft 30 is formed so as to protrude from the outer side surface 36 of the large diameter portion 32 in the axial direction relative to the inner side end surface 15a of the caulking portion 15. It is not necessary to provide a special shape such as a projecting surface on the inner side surface 26 of the inner ring 21 with which the end surface 37a of 37 is in contact. For this reason, when the inner ring 21 is fixed by caulking at the shaft end, it is possible to prevent the special shape from restricting the rocking space of the caulking jig and the shape of the caulking portion 15. The shaft end caulking can be executed so that the inner ring 21 is securely fixed.

（３）上記実施形態では、駆動軸３０の突出部３７が当接する内輪２１のインナー側の側面２６は、かしめ部１５により押さえ付けられる面と同一面であるため、内輪２１の形状を簡素化することができ、製造工程の削減や低コスト化を図ることができる。   (3) In the above embodiment, since the inner side surface 26 of the inner ring 21 with which the projecting portion 37 of the drive shaft 30 abuts is the same surface as the surface pressed by the caulking portion 15, the shape of the inner ring 21 is simplified. Therefore, the manufacturing process can be reduced and the cost can be reduced.

（４）上記実施形態では、駆動軸３０の突出部３７が当接する内輪２１のインナー側の側面２６は、一般的に精度の高い平面で形成されているため、当接面における面圧が局部的に上昇してしまうことを抑えることができる。このため、当接面間にねじりトルクが作用するような場合に、スティックスリップ現象によって大きなエネルギが蓄積及び開放されることを抑えることができ、エネルギの開放によって発生する異音の音圧レベルを低減することができる。   (4) In the above embodiment, since the inner side surface 26 of the inner ring 21 with which the protrusion 37 of the drive shaft 30 abuts is generally formed with a high accuracy plane, the surface pressure on the abutment surface is locally localized. Can be prevented from rising. For this reason, when torsional torque acts between the contact surfaces, it is possible to suppress the accumulation and release of large energy due to the stick-slip phenomenon, and the sound pressure level of abnormal noise generated by the release of energy can be reduced. Can be reduced.

なお、上記実施形態は以下のように変更してもよい。
・上記実施形態では、突出部３７は円筒状に形成され、アウター側の端面３７ａの全周が、内輪２１のインナー側の側面２６に当接するように構成されているが、側面２６と当接する端面３７ａは、全周に亘って設けられていなくてもよく、周方向に分割して複数箇所設けられるようにしてもよい。 In addition, you may change the said embodiment as follows.
In the above embodiment, the protruding portion 37 is formed in a cylindrical shape, and the entire circumference of the outer side end surface 37 a is configured to contact the side surface 26 on the inner side of the inner ring 21, but contacts the side surface 26. The end surface 37a may not be provided over the entire circumference, and may be provided in a plurality of locations divided in the circumferential direction.

・上記実施形態では、突出部３７が当接する内輪２１のインナー側の側面２６は、かしめ部１５により押さえ付けられる面と同一面となるように構成されているが、突出部３７と当接する面がかしめ部１５により押さえ付けられる面と異なる面となるように内輪２１を構成してもよい。   In the above embodiment, the side surface 26 on the inner side of the inner ring 21 with which the protruding portion 37 abuts is configured to be the same surface as the surface pressed by the caulking portion 15, but the surface abutting with the protruding portion 37. The inner ring 21 may be configured to be a surface different from the surface pressed by the caulking portion 15.

・上記実施形態では、円筒軸部１２のフランジ部１３側の外周に、アウター側の玉２４の軌道面である第２軌道１２ａを形成しているが、内輪２１のアウター側に個別の内輪部材を設けるように構成し、この内輪に第２軌道１２ａを形成するようにしてもよい。   In the above embodiment, the second raceway 12a, which is the raceway surface of the outer ball 24, is formed on the outer periphery of the cylindrical shaft portion 12 on the flange portion 13 side. The second track 12a may be formed on the inner ring.

・上記実施形態では、転がり軸受２０として複列の玉軸受を用いているが、複列の円錐ころ軸受を用いてもよい。   In the above embodiment, a double row ball bearing is used as the rolling bearing 20, but a double row tapered roller bearing may be used.

本実施形態に係る車輪用転がり軸受装置の縦断面図。The longitudinal section of the rolling bearing device for wheels concerning this embodiment. 従来の例における車輪用転がり軸受装置の縦断面図。The longitudinal cross-sectional view of the rolling bearing device for wheels in the conventional example.

符号の説明Explanation of symbols

１…車輪用転がり軸受装置、１０…内軸、１１…スプライン孔、１２…円筒軸部、１５…かしめ部、２０…転がり軸受、２１…内輪、２２…外輪、３０…駆動軸、３１…軸部、３２…大径部、３７…突出部。   DESCRIPTION OF SYMBOLS 1 ... Rolling bearing apparatus for wheels, 10 ... Inner shaft, 11 ... Spline hole, 12 ... Cylindrical shaft part, 15 ... Caulking part, 20 ... Rolling bearing, 21 ... Inner ring, 22 ... Outer ring, 30 ... Drive shaft, 31 ... Shaft Part 32 ... large diameter part 37 ... projection part.

Claims (2)

車輪が取り付けられる円筒状の内軸と、
内軸の外周に嵌合され、内軸のインナー側軸端を径方向外方にかしめ広げることで形成されたかしめ部により固定される転がり軸受の内輪と、
内軸の中心に形成されたスプライン孔に挿入される駆動軸とを備えた車輪用転がり軸受装置において、
前記駆動軸は、前記スプライン孔に挿入される軸部よりインナー側に大径部を有し、
前記大径部は、アウター側の側面から前記かしめ部のインナー側端面よりも軸方向に突出して形成され、前記内輪のインナー側の側面に当接する突出部を有する
ことを特徴とする車輪用転がり軸受装置。 A cylindrical inner shaft to which the wheel is attached;
An inner ring of a rolling bearing which is fitted to the outer periphery of the inner shaft and is fixed by a caulking portion formed by caulking and expanding the inner side shaft end of the inner shaft radially outward;
In the rolling bearing device for a wheel provided with the drive shaft inserted in the spline hole formed in the center of the inner shaft,
The drive shaft has a large diameter portion on the inner side from the shaft portion inserted into the spline hole,
The large-diameter portion has a protruding portion that protrudes in an axial direction from an inner side surface of the caulking portion from a side surface on the outer side, and has a protruding portion that contacts the inner side surface of the inner ring. Bearing device. 請求項１に記載の車輪用転がり軸受装置において、
前記突出部が当接する内輪のインナー側の側面は、前記かしめ部により押さえ付けられる面と同一面である
ことを特徴とする車輪用転がり軸受装置。 In the rolling bearing device for wheels according to claim 1,
The rolling bearing device for a wheel according to claim 1, wherein a side surface on the inner side of the inner ring with which the protruding portion abuts is the same surface as a surface pressed by the caulking portion.
JP2006259690A 2006-09-25 2006-09-25 Wheel rolling bearing device Pending JP2008082350A (en)

Priority Applications (1)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173404U (en) * 1984-06-15 1985-11-16 日本精工株式会社 Axle bearing fixing device
JP2001001710A (en) * 1999-06-18 2001-01-09 Ntn Corp Axle bearing
JP2006105320A (en) * 2004-10-07 2006-04-20 Jtekt Corp Tapered roller bearing
JP2006161970A (en) * 2004-12-08 2006-06-22 Ntn Corp Wheel bearing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173404U (en) * 1984-06-15 1985-11-16 日本精工株式会社 Axle bearing fixing device
JP2001001710A (en) * 1999-06-18 2001-01-09 Ntn Corp Axle bearing
JP2006105320A (en) * 2004-10-07 2006-04-20 Jtekt Corp Tapered roller bearing
JP2006161970A (en) * 2004-12-08 2006-06-22 Ntn Corp Wheel bearing device

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