JP4557223B2 - Drive wheel bearing device - Google Patents

Drive wheel bearing device Download PDF

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Publication number
JP4557223B2
JP4557223B2 JP2005095820A JP2005095820A JP4557223B2 JP 4557223 B2 JP4557223 B2 JP 4557223B2 JP 2005095820 A JP2005095820 A JP 2005095820A JP 2005095820 A JP2005095820 A JP 2005095820A JP 4557223 B2 JP4557223 B2 JP 4557223B2
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joint member
outer joint
wheel
rolling
annular recess
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JP2006275174A (en
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茂明 福島
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NTN Corp
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NTN Corp
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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
    • 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
    • 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
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/073—Fixing them on the shaft or housing with interposition of an element between shaft and inner race 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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • 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
    • F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
    • 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

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

Description

本発明は、自動車等の車両の駆動車輪を支持する駆動車輪用軸受装置、詳しくは、車輪用軸受と等速自在継手とを備え、独立懸架式サスペンションに装着された駆動輪（ＦＦ車の前輪、ＦＲ車あるいはＲＲ車の後輪、および４ＷＤ車の全輪）を懸架装置に対して回転自在に支持する駆動車輪用軸受装置に関するものである。   The present invention relates to a drive wheel bearing device that supports a drive wheel of a vehicle such as an automobile, and more specifically, a drive wheel (front wheel of an FF vehicle) that includes a wheel bearing and a constant velocity universal joint and is mounted on an independent suspension. , A rear wheel of an FR vehicle or an RR vehicle, and all wheels of a 4WD vehicle).

自動車等の車両のエンジン動力を車輪に伝達する動力伝達装置は、エンジンから車輪へ動力を伝達すると共に、悪路走行時における車両のバウンドや車両の旋回時に生じる車輪からの径方向や軸方向変位、およびモーメント変位を許容する必要があるため、例えば、エンジン側と駆動車輪側との間に介装されるドライブシャフトの一端が摺動型の等速自在継手を介してディファレンシャルに連結され、他端が固定型の等速自在継手を含む駆動車輪用軸受装置を介して駆動輪に連結されている。   A power transmission device that transmits engine power of a vehicle such as an automobile to a wheel transmits power from the engine to the wheel, and also causes radial or axial displacement from the wheel that occurs when the vehicle bounces or turns when traveling on a rough road. For example, one end of the drive shaft interposed between the engine side and the drive wheel side is connected to the differential through a sliding type constant velocity universal joint, and the like. The end is connected to the drive wheel via a drive wheel bearing device including a fixed type constant velocity universal joint.

この駆動車輪用軸受装置として従来から種々の構造のものが提案されているが、例えば図６に示すようなものが知られている。この駆動車輪用軸受装置５０は、駆動輪ＷとブレーキロータＢを一端部に装着するハブ輪５１と、このハブ輪５１を回転自在に支承する複列の転がり軸受５２、およびハブ輪５１に連結され、ドライブシャフト（図示せず）の動力をハブ輪５１に伝達する固定型の等速自在継手５３を備えている。   Various types of drive wheel bearing devices have been proposed in the past. For example, a device as shown in FIG. 6 is known. The drive wheel bearing device 50 is connected to a hub wheel 51 on which one end of the drive wheel W and the brake rotor B is mounted, a double-row rolling bearing 52 that rotatably supports the hub wheel 51, and the hub wheel 51. In addition, a fixed type constant velocity universal joint 53 that transmits power of a drive shaft (not shown) to the hub wheel 51 is provided.

ハブ輪５１は、一端部に駆動輪ＷおよびブレーキロータＢを取り付けるための車輪取付フランジ５４を一体に有し、この車輪取付フランジ５４から軸方向に延びる円筒状の小径段部５１ａが形成されている。複列の転がり軸受５２は、懸架装置を構成するナックルＮとハブ輪５１の小径段部５１ａ間に装着され、内周に複列の外側転走面５５ａ、５５ａが形成された外輪５５と、外周に複列の外側転走面５５ａ、５５ａに対向する内側転走面５６ａが形成された一対の内輪５６、５６と、両転走面５５ａ、５６ａ間に保持器５７を介して転動自在に収容された複列のボール５８、５８とを備えた複列のアンギュラ玉軸受からなる。   The hub wheel 51 integrally has a wheel mounting flange 54 for mounting the driving wheel W and the brake rotor B at one end, and a cylindrical small-diameter step portion 51a extending in the axial direction from the wheel mounting flange 54 is formed. Yes. The double-row rolling bearing 52 is mounted between the knuckle N constituting the suspension device and the small-diameter step portion 51a of the hub wheel 51, and an outer ring 55 in which double-row outer rolling surfaces 55a and 55a are formed on the inner periphery, A pair of inner rings 56, 56 each having an inner rolling surface 56 a opposite to the outer circumferential rolling surfaces 55 a, 55 a in a double row on the outer periphery, and a cage 57 between both rolling surfaces 55 a, 56 a are freely rollable. And a double-row angular ball bearing having double-row balls 58 and 58 accommodated in the ball.

等速自在継手５３は、カップ状のマウス部（図示せず）とこのマウス部の底部をなす肩部５９と、この肩部５９から軸方向に延びる軸部６０とを一体に有する外側継手部材６１を備えている。この外側継手部材６１はセレーションを介して前記ハブ輪５１にトルク伝達可能に内嵌されている。そして、複列の転がり軸受５２の内輪５６に肩部５９が突き合わされるまで軸部６０がハブ輪５１に内嵌されると共に、軸部６０の端部に形成された雄ねじ６２に固定ナット６３が所定の締め付けトルクで締結され、ハブ輪５１と外側継手部材６１とが軸方向分離可能に結合されている。   The constant velocity universal joint 53 is an outer joint member integrally having a cup-shaped mouth portion (not shown), a shoulder portion 59 that forms the bottom portion of the mouth portion, and a shaft portion 60 that extends in the axial direction from the shoulder portion 59. 61 is provided. The outer joint member 61 is fitted into the hub wheel 51 through serrations so as to transmit torque. Then, the shaft portion 60 is fitted into the hub wheel 51 until the shoulder portion 59 abuts against the inner ring 56 of the double row rolling bearing 52, and the fixing nut 63 is attached to the male screw 62 formed at the end of the shaft portion 60. Are fastened with a predetermined tightening torque, and the hub wheel 51 and the outer joint member 61 are coupled so as to be separable in the axial direction.

こうした車両の駆動輪Ｗには、エンジン低速回転時、例えば車両発進時に、エンジンから摺動型の等速自在継手（図示せず）を介して大きなトルクが負荷され、ドライブシャフトに捩じれが生じることが知られている。その結果、このドライブシャフトを支持する複列の転がり軸受５２の内輪５６にも捩じれが生じることになる。このようにドライブシャフトに大きな捩じれが発生した場合、ハブ輪５１と、ハブ輪５１に内嵌された外側継手部材６１における軸部６０のセレーション間に周方向のすきまがあれば、外側継手部材６１と内輪５６との当接面で急激なスリップによる、所謂スティックスリップ音が発生する。   A large torque is applied to the driving wheel W of such a vehicle through a sliding type constant velocity universal joint (not shown) from the engine when the engine rotates at a low speed, for example, when the vehicle starts, and the drive shaft is twisted. It has been known. As a result, the inner ring 56 of the double row rolling bearing 52 supporting the drive shaft is also twisted. When a large twist occurs in the drive shaft in this way, if there is a circumferential clearance between the serrations of the hub portion 51 and the shaft portion 60 of the outer joint member 61 fitted inside the hub wheel 51, the outer joint member 61. A so-called stick-slip sound is generated by a sudden slip at the contact surface between the inner ring 56 and the inner ring 56.

この対策手段として、この従来の駆動車輪用軸受装置５０では、外側継手部材６１の肩部５９と当接する部分等に摩擦抵抗を小さくする表面処理が施されている。すなわち、図７（ａ）（ｂ）に示すように、内輪５６の端面５６ｂ、５６ｃにグリース溝６４が円周方向に刻設されている。この表面処理でもって、当接する相手部材間にグリース等の潤滑油が侵入し易くなることで摩擦抵抗を小さくし、スムーズな滑りが得られてスティックスリップ音を抑制する効果を発揮できる。
特開２０００−１１０８４９号公報 As a countermeasure against this, in the conventional drive wheel bearing device 50, a surface treatment for reducing the frictional resistance is applied to a portion of the outer joint member 61 that contacts the shoulder 59. That is, as shown in FIGS. 7 (a) and 7 (b), the grease grooves 64 are formed in the circumferential direction on the end faces 56b and 56c of the inner ring 56. With this surface treatment, lubricating oil such as grease can easily enter between the abutting counterpart members, thereby reducing frictional resistance and obtaining an effect of suppressing stick-slip noise by obtaining a smooth slip.
JP 2000-110849 A

この従来の駆動車輪用軸受装置では、内輪５６の端面５６ｂ、５６ｃにグリース溝６４からなる表面処理が施され、当接する相手部材との摩擦抵抗を小さくしてスティックスリップ音を抑制することができるが、複数の部位にこうした表面処理をする必要があり、低コスト化を阻害する要因となっていた。   In this conventional drive wheel bearing device, the end surfaces 56b and 56c of the inner ring 56 are subjected to a surface treatment including a grease groove 64, and the frictional resistance with the abutting member can be reduced to suppress stick-slip noise. However, it is necessary to perform such surface treatment on a plurality of parts, which has been a factor that hinders cost reduction.

また、この種の駆動車輪用軸受装置では、外側継手部材６１における軸部５９の雄ねじ６２に固定ナット６３が螺着され、この固定ナット６３の緊締力（軸力）により、複列の転がり軸受５２の予圧量が調整・管理されるため、一定以上の緊締力が必要となる。然しながら、この緊締力とスティックスリップ音は比例関係にあり、スティックスリップ音の音圧、すなわち、摩擦エネルギーの蓄積量をこうした表面処理で抑制するには限界があった。   Further, in this type of drive wheel bearing device, a fixing nut 63 is screwed onto the male screw 62 of the shaft portion 59 of the outer joint member 61, and a double row rolling bearing is applied by the tightening force (axial force) of the fixing nut 63. Since the preload amount of 52 is adjusted and managed, a certain level of tightening force is required. However, the tightening force and the stick-slip sound are in a proportional relationship, and there is a limit in suppressing the sound pressure of the stick-slip sound, that is, the accumulated amount of friction energy by such surface treatment.

本発明は、このような事情に鑑みてなされたもので、当接する相手部材とのスムーズな滑りによりスティックスリップ音を防止した駆動車輪用軸受装置を提供することを目的としている。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a drive wheel bearing device in which stick-slip noise is prevented by smooth sliding with a contact member.

係る目的を達成すべく、本発明のうち請求項１に記載の発明は、内周に複列の外側転走面が形成された外方部材と、一端部に車輪取付フランジを一体に有し、外周に軸方向に延びる円筒状の小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、前記両転走面間に転動自在に収容された複列の転動体と、前記内方部材にトルク伝達可能に内嵌される軸部を一体に有する等速自在継手の外側継手部材とを備え、この外側継手部材の軸部に締結された固定ナットによって、前記内方部材に突き合わせ状態で前記ハブ輪に対して前記外側継手部材が軸方向に分離可能に締結された駆動車輪用軸受装置において、前記外側継手部材の肩部に環状凹所が形成され、この環状凹所に焼入れ硬化された複数枚のプレートが積層されてなるスラスト軸受が前記内方部材に当接されると共に、前記環状凹所に鋼板製の保持環が収容され、この保持環が、前記環状凹所に外嵌される円筒部と、この円筒部の一端に径方向外方に延びる鍔を有し、この鍔を前記プレートに係合させることによって当該プレートが一体に保持されている構成を採用した。
In order to achieve such an object, the invention according to claim 1 of the present invention integrally has an outer member having a double row outer rolling surface formed on the inner periphery and a wheel mounting flange at one end. A hub ring having a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring, and facing the outer rolling surface of the double row An inner member in which a double row inner rolling surface is formed, a double row rolling element that is rotatably accommodated between the two rolling surfaces, and an inner member that is capable of transmitting torque to the inner member. And an outer joint member of a constant velocity universal joint integrally having a shaft portion, and a fixed nut fastened to the shaft portion of the outer joint member, and the outer ring member with respect to the hub wheel in a state of abutting against the inner member. in the bearing device for a driving wheel coupling member is fastened detachably in the axial direction, the outer An annular recess is formed in the shoulder of the joint member, and a thrust bearing formed by laminating a plurality of hardened and hardened plates in the annular recess is brought into contact with the inner member, and in the annular recess. A steel plate retaining ring is accommodated. The retaining ring has a cylindrical portion fitted over the annular recess, and a flange extending radially outward at one end of the cylindrical portion, and the collar is attached to the plate. A configuration was adopted in which the plates were held together by engaging them.

このように、外方部材と、ハブ輪、およびこのハブ輪に圧入された内輪とからなる内方部材と、両部材間に収容された複数の転動体と、内方部材にトルク伝達可能に内嵌された等速自在継手の外側継手部材とを備え、この外側継手部材に締結された固定ナットの緊締力によって軸受の予圧量を管理するようにした駆動車輪用軸受装置において、外側継手部材の肩部に環状凹所が形成され、この環状凹所に焼入れ硬化された複数枚のプレートが積層されてなるスラスト軸受が内方部材に当接されると共に、環状凹所に鋼板製の保持環が収容され、この保持環が、環状凹所に外嵌される円筒部と、この円筒部の一端に径方向外方に延びる鍔を有し、この鍔をプレートに係合させることによって当該プレートが一体に保持されているので、このスラスト軸受が、固定ナットによってハブ輪と外側継手部材とを緊締する際、外側継手部材と内方部材に挟持された状態で圧接され、伝達トルクの変動に伴う周方向の相対変位を許容して、各当接面での摩擦エネルギーの蓄積を分散させることができる。これにより、組立性あるいは低コスト化を阻害することなく、軸部に大きなトルクが負荷されてもスムーズな捩れを許容してスティックスリップ音等の騒音を低減させると共に、それに伴うフレッティング摩耗を防止し、耐久性の向上を図った駆動車輪用軸受装置を提供することができる。
Thus, torque can be transmitted to the inner member, which is composed of the outer member, the hub ring, and the inner ring that is press-fitted into the hub ring, a plurality of rolling elements accommodated between the two members, and the inner member. An outer joint member of a constant velocity universal joint fitted therein, and an outer joint member for a drive wheel bearing device in which a preload amount of the bearing is managed by a tightening force of a fixing nut fastened to the outer joint member. An annular recess is formed in the shoulder of the steel plate, and a thrust bearing formed by laminating a plurality of quench-hardened plates in the annular recess is brought into contact with the inner member, and a steel plate is held in the annular recess. The ring is accommodated, and the holding ring has a cylindrical portion that is externally fitted in the annular recess, and a flange that extends radially outward at one end of the cylindrical portion. since the plates are held together, this slide When the hub bearing is tightened between the hub wheel and the outer joint member by the fixing nut, it is pressed in a state of being sandwiched between the outer joint member and the inner member to allow relative displacement in the circumferential direction accompanying fluctuations in transmission torque. The accumulation of friction energy at each contact surface can be dispersed. As a result, even if a large torque is applied to the shaft, it can be smoothly twisted to reduce noise such as stick-slip noise and prevent fretting wear. And the bearing apparatus for drive wheels which aimed at the improvement of durability can be provided.

好ましくは、請求項２に記載の発明のように、前記プレートの少なくとも一側面に複数の凹所が形成され、かつ前記プレートの側面に潤滑剤が塗布されていれば、相手部材との間の摩擦係数を低減することができると共に、これら凹所が潤滑剤の溜まり部となり、長期間に亘って潤滑膜を形成して耐摩耗性を保持することができる。
 Good Mashiku, as in the invention according to claim 2, a plurality of recesses on at least one side surface of the front Symbol plate form, and if the lubricant is applied to the side surface of the plate, and the mating member In addition, the friction coefficient can be reduced, and these recesses can serve as a reservoir for the lubricant, so that a lubricating film can be formed over a long period of time and wear resistance can be maintained.

本発明に係る駆動車輪用軸受装置は、内周に複列の外側転走面が形成された外方部材と、一端部に車輪取付フランジを一体に有し、外周に軸方向に延びる円筒状の小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、前記両転走面間に転動自在に収容された複列の転動体と、前記内方部材にトルク伝達可能に内嵌される軸部を一体に有する等速自在継手の外側継手部材とを備え、この外側継手部材の軸部に締結された固定ナットによって、前記内方部材に突き合わせ状態で前記ハブ輪に対して前記外側継手部材が軸方向に分離可能に締結された駆動車輪用軸受装置において、前記外側継手部材の肩部に環状凹所が形成され、この環状凹所に焼入れ硬化された複数枚のプレートが積層されてなるスラスト軸受が前記内方部材に当接されると共に、前記環状凹所に鋼板製の保持環が収容され、この保持環が、前記環状凹所に外嵌される円筒部と、この円筒部の一端に径方向外方に延びる鍔を有し、この鍔を前記プレートに係合させることによって当該プレートが一体に保持されているので、このスラスト軸受が、固定ナットによってハブ輪と外側継手部材とを緊締する際、外側継手部材と内方部材に挟持された状態で圧接され、伝達トルクの変動に伴う周方向の相対変位を許容して、各当接面での摩擦エネルギーの蓄積を分散させることができる。これにより、組立性あるいは低コスト化を阻害することなく、軸部に大きなトルクが負荷されてもスムーズな捩れを許容してスティックスリップ音等の騒音を低減させると共に、それに伴うフレッティング摩耗を防止し、耐久性の向上を図った駆動車輪用軸受装置を提供することができる。 The bearing device for a drive wheel according to the present invention has an outer member in which a double row outer rolling surface is formed on the inner periphery, a wheel mounting flange at one end, and a cylindrical shape that extends in the axial direction on the outer periphery. A hub ring formed with a small-diameter step portion and at least one inner ring press-fitted into the small-diameter step portion of the hub ring, and a double-row inner raceway surface facing the double-row outer raceway surface A constant speed integrally having a formed inner member, a double row rolling element accommodated so as to be able to roll between the both rolling surfaces, and a shaft portion fitted in the inner member so as to transmit torque. An outer joint member of a universal joint, and a fixing nut fastened to a shaft portion of the outer joint member so that the outer joint member can be separated in the axial direction with respect to the hub wheel in a state of abutting against the inner member. in the bearing device for fastening to drive wheels, an annular concave shoulder of the outer joint member A thrust bearing formed by laminating a plurality of quench-hardened plates in the annular recess is brought into contact with the inner member, and a steel plate retaining ring is accommodated in the annular recess, The holding ring has a cylindrical portion fitted over the annular recess, and a flange extending radially outward at one end of the cylindrical portion. The plate is integrated by engaging the flange with the plate. because it is held in, the thrust bearing, when tightening the hub wheel and the outer joint member by a fixing nut, are pressed while being held on the outer joint member and the inner member, a circumferential accompanying fluctuation of the transmission torque It is possible to disperse the accumulation of frictional energy at each contact surface by allowing relative displacement in the direction. As a result, even if a large torque is applied to the shaft, it can be smoothly twisted to reduce noise such as stick-slip noise and prevent fretting wear. And the bearing apparatus for drive wheels which aimed at the improvement of durability can be provided.

外周に車体に取り付けるための車体取付フランジを一体に有し、内周に複列の外側転走面が形成された外方部材と、一端部に車輪取付フランジを一体に有し、外周に前記複列の外側転走面に対向する一方の内側転走面と、この内側転走面から軸方向に延びる円筒状の小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入され、外周に前記複列の外側転走面に対向する他方の内側転走面が形成された内輪とからなる内方部材と、前記両転走面間に転動自在に収容された複列の転動体と、前記内方部材にトルク伝達可能に内嵌される軸部を一体に有する等速自在継手の外側継手部材とを備え、この外側継手部材の軸部に締結された固定ナットによって、前記内方部材に突き合わせ状態で前記ハブ輪に対して前記外側継手部材が軸方向に分離可能に締結された駆動車輪用軸受装置において、前記外側継手部材の肩部に環状凹所が形成され、この環状凹所に複数枚のプレートが積層されると共に、前記プレートの少なくとも一側面に複数の凹所が形成され、かつ前記プレートの側面に潤滑剤が塗布されている。   A body mounting flange for mounting to the vehicle body on the outer periphery, an outer member having a double row outer rolling surface formed on the inner periphery, a wheel mounting flange on one end, and a wheel mounting flange on the outer periphery. A hub wheel formed with one inner rolling surface facing the outer rolling surface of the double row, a cylindrical small diameter step portion extending in an axial direction from the inner rolling surface, and a small diameter step portion of the hub ring An inner member comprising an inner ring that is press-fitted and has the other inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and a plurality of rolling members accommodated between the rolling surfaces. A fixed nut that includes a rolling element in a row and an outer joint member of a constant velocity universal joint integrally including a shaft portion that is fitted into the inner member so as to transmit torque, and is fastened to the shaft portion of the outer joint member The outer joint member is axially moved with respect to the hub wheel in a state of being in contact with the inner member. In the drive wheel bearing device that is separably fastened, an annular recess is formed in a shoulder portion of the outer joint member, and a plurality of plates are stacked in the annular recess, and on at least one side surface of the plate. A plurality of recesses are formed, and a lubricant is applied to the side surface of the plate.

以下、本発明の実施の形態を図面に基いて詳細に説明する。
図１は、本発明に係る駆動車輪用軸受装置の第１の実施形態を示す縦断面図、図２は図１の要部拡大図である。なお、以下の説明では、車両に組み付けた状態で車両の外側寄りとなる側をアウトボード側（図面左側）、中央寄り側をインボード側（図面右側）という。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a first embodiment of a bearing device for a drive wheel according to the present invention, and FIG. 2 is an enlarged view of a main part of FIG. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outboard side (left side in the drawing), and the side closer to the center is referred to as the inboard side (right side in the drawing).

この駆動車輪用軸受装置は、内方部材１と外方部材１０、および両部材１、１０間に転動自在に収容された複列の転動体（ボール）６、６と、後述する等速自在継手１１の外側継手部材１４とを備えている。内方部材１は、ハブ輪２と、このハブ輪２に圧入された別体の内輪３とからなる。   This drive wheel bearing device includes an inner member 1, an outer member 10, and double-row rolling elements (balls) 6 and 6 accommodated between the members 1 and 10 so as to be freely rollable, and a constant speed described later. And an outer joint member 14 of the universal joint 11. The inner member 1 includes a hub ring 2 and a separate inner ring 3 that is press-fitted into the hub ring 2.

ハブ輪２は、アウトボード側の端部に車輪（図示せず）を取り付けるための車輪取付フランジ４を一体に有し、この車輪取付フランジ４の円周等配位置には車輪を固定するためのハブボルト５が植設されている。また、ハブ輪２の外周には内側転走面２ａと、この内側転走面２ａから軸方向に延びる円筒状の小径段部２ｂが形成され、外周に内側転走面３ａが形成された内輪３がこの小径段部２ｂに圧入されている。   The hub wheel 2 integrally has a wheel mounting flange 4 for mounting a wheel (not shown) at an end portion on the outboard side, and the wheel is fixed at a circumferentially equidistant position of the wheel mounting flange 4. The hub bolt 5 is planted. Further, an inner ring in which an inner rolling surface 2a and a cylindrical small diameter step portion 2b extending in the axial direction from the inner rolling surface 2a are formed on the outer periphery of the hub wheel 2 and an inner rolling surface 3a is formed on the outer periphery. 3 is press-fitted into the small diameter step 2b.

外方部材１０は、外周に車体（図示せず）に取り付けるための車体取付フランジ１０ｂを一体に有し、内周に前記内方部材１の内側転走面２ａ、３ａに対向する複列の外側転走面１０ａ、１０ａが形成されている。そして、それぞれの転走面１０ａ、２ａ、１０ａ、３ａ間に複列の転動体６、６が保持器７、７を介して転動自在に収容されている。また、外方部材１０の端部にはシール装置８、９が装着され、軸受内部に封入された潤滑グリースの漏洩を防止すると共に、外部から軸受内部に雨水やダスト等が侵入するのを防止している。   The outer member 10 integrally has a vehicle body mounting flange 10b for mounting to the vehicle body (not shown) on the outer periphery, and has a double row facing the inner rolling surfaces 2a and 3a of the inner member 1 on the inner periphery. Outer rolling surfaces 10a and 10a are formed. And the double-row rolling elements 6 and 6 are accommodated so that rolling is possible via the holder | retainers 7 and 7 between each rolling surface 10a, 2a, 10a, 3a. Sealing devices 8 and 9 are mounted on the end of the outer member 10 to prevent leakage of lubricating grease sealed inside the bearing and to prevent rainwater and dust from entering the bearing from the outside. is doing.

等速自在継手１１は、カップ状のマウス部（図示せず）の底部をなす肩部１２と、この肩部１２から軸方向に延びる軸部１３とを一体に有する外側継手部材１４を備えている。この外側継手部材１４はＳ５３Ｃ等の炭素０．４０〜０．８０重量％を含む中炭素鋼で形成され、肩部１２から軸部１３に亙って高周波焼入れによって表面硬さを５４〜６４ＨＲＣの範囲に硬化処理されている。   The constant velocity universal joint 11 includes an outer joint member 14 that integrally includes a shoulder portion 12 that forms the bottom of a cup-shaped mouth portion (not shown) and a shaft portion 13 that extends from the shoulder portion 12 in the axial direction. Yes. The outer joint member 14 is formed of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and has a surface hardness of 54 to 64 HRC by induction hardening from the shoulder portion 12 to the shaft portion 13. Hardened to range.

外側継手部材１４は前記内方部材１にトルク伝達可能に内嵌されている。すなわち、ハブ輪２の内周にセレーション（またはスプライン）２ｃが形成されると共に、外側継手部材１４の軸部１３の外周にセレーション（またはスプライン）１３ａが形成され、両セレーション２ｃ、１３ａが噛合されている。そして、内輪３に肩部１２が突き合わされるまで外側継手部材１４の軸部１３がハブ輪２に内嵌されると共に、軸部１３の端部に形成された雄ねじ１５に固定ナット１６が所定の締め付けトルクで締結され、ハブ輪２と外側継手部材１４とが軸方向分離可能に結合されている。   The outer joint member 14 is fitted into the inner member 1 so that torque can be transmitted. That is, a serration (or spline) 2c is formed on the inner periphery of the hub wheel 2, and a serration (or spline) 13a is formed on the outer periphery of the shaft portion 13 of the outer joint member 14, and both the serrations 2c and 13a are meshed. ing. Then, the shaft portion 13 of the outer joint member 14 is fitted into the hub wheel 2 until the shoulder portion 12 is abutted against the inner ring 3, and a fixing nut 16 is fixed to the male screw 15 formed at the end portion of the shaft portion 13. The hub wheel 2 and the outer joint member 14 are coupled so as to be separable in the axial direction.

ハブ輪２は、Ｓ５３Ｃ等の炭素０．４０〜０．８０重量％を含む中炭素鋼で形成され、内側転走面２ａをはじめ、シール装置８が摺接するシールランド部、および小径段部２ｂに亙り高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理されている。こうした高周波焼入れパターンによりハブ輪２の強度が向上すると共に、内輪３の嵌合面におけるフレッティング摩耗が抑制されて耐久性が向上する。   The hub wheel 2 is formed of medium carbon steel containing carbon of 0.40 to 0.80% by weight, such as S53C, and includes an inner rolling surface 2a, a seal land portion in which the seal device 8 is in sliding contact, and a small diameter step portion 2b. On the other hand, the surface hardness is set to a range of 58 to 64 HRC by induction hardening. Such an induction hardening pattern improves the strength of the hub wheel 2 and suppresses fretting wear on the fitting surface of the inner ring 3 to improve durability.

一方、内輪３は、ＳＵＪ２等の高炭素クロム軸受鋼からなり、ズブ焼入れにより芯部まで５８〜６４ＨＲＣの範囲で硬化処理されている。また、外方部材１０はＳ５３Ｃ等の炭素０．４０〜０．８０重量％を含む中炭素鋼で形成され、複列の外側転走面１０ａ、１０ａが高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理されている。   On the other hand, the inner ring 3 is made of high carbon chrome bearing steel such as SUJ2, and is hardened in the range of 58 to 64 HRC up to the core part by quenching. The outer member 10 is formed of medium carbon steel containing 0.40 to 0.80% by weight of carbon such as S53C, and the double row outer rolling surfaces 10a and 10a have a surface hardness of 58 to 64HRC by induction hardening. It has been cured to the extent of.

なお、本実施形態では、転動体６にボールを使用した複列アンギュラ玉軸受を例示したが、これに限らず、例えば、転動体６に円すいころを用いた複列円すいころ軸受であっても良い。また、ここでは、車輪用軸受として第３世代構造のものを例示したが、これに限らず、車輪用軸受の予圧付与が自己完結していない構造なら良く、例えば、車輪用軸受に等速自在継手１１の外側継手部材１４を連結し、この外側継手部材１４に固定ナット１６を締結することによって軸受の予圧を付与する第１あるいは第２世代構造であっても良い。   In the present embodiment, a double row angular contact ball bearing using a ball as the rolling element 6 has been exemplified. However, the present invention is not limited to this. For example, a double row tapered roller bearing using a tapered roller as the rolling element 6 may be used. good. Here, the third generation structure is exemplified as the wheel bearing. However, the present invention is not limited to this, and any structure may be used as long as the preloading of the wheel bearing is not self-contained. A first or second generation structure may be used in which the outer joint member 14 of the joint 11 is connected and a fixing nut 16 is fastened to the outer joint member 14 to apply a preload of the bearing.

本実施形態では、図２に拡大して示すように、外側継手部材１４の肩部１２に環状凹所１７が形成され、滑り軸受からなるスラスト軸受１８が介装されている。このスラスト軸受（滑り軸受）１８は、ばね鋼（ＪＩＳのＳＵＰ系）やステンレス鋼（ＪＩＳのＳＵＳ系）からなる円板状の複数枚のプレート１８ａ、１８ｂ、１８ｂで構成され、耐摩耗性と靭性を確保するため、表面に所定の硬化処理が施されている。なお、複数のプレート１８ａ、１８ｂ、１８ｂのうち、内輪３の端面に当接するプレート１８ａには環状の凹部１９が形成されている。また、このスラスト軸受１８は、鋼板をプレス加工して円筒状に形成された保持環２０によってユニット化されている。すなわち、保持環２０は一端部に径方向外方に延びる鍔２０ａを有し、断面が略Ｌ字状に形成されている。そして、保持環２０の円筒部２０ｂに積層されたプレート１８ａ、１８ｂ、１８ｂが外嵌されると共に、鍔２０ａにプレート１８ａの凹部１９が係合されている。これにより、スペースをとらず、また、組立性および低コスト化を阻害することはない。   In the present embodiment, as shown in an enlarged view in FIG. 2, an annular recess 17 is formed in the shoulder 12 of the outer joint member 14, and a thrust bearing 18 made of a slide bearing is interposed. This thrust bearing (sliding bearing) 18 is composed of a plurality of disk-shaped plates 18a, 18b, 18b made of spring steel (JIS SUP system) or stainless steel (JIS SUS system), and has wear resistance. In order to ensure toughness, the surface is subjected to a predetermined curing treatment. An annular recess 19 is formed in the plate 18a that contacts the end surface of the inner ring 3 among the plurality of plates 18a, 18b, 18b. The thrust bearing 18 is unitized by a retaining ring 20 formed into a cylindrical shape by pressing a steel plate. In other words, the holding ring 20 has a flange 20a extending radially outward at one end portion, and has a substantially L-shaped cross section. The plates 18a, 18b, and 18b stacked on the cylindrical portion 20b of the retaining ring 20 are externally fitted, and the recess 19 of the plate 18a is engaged with the flange 20a. This does not take up space and does not hinder assembly and cost reduction.

また、プレート１８ａ、１８ｂは、図３（ａ）に示すように、プレス加工によって、その両側面に同心状の環状溝（凹所）２１が複数刻設されている。さらに、各プレート１８ａ、１８ｂ間には二硫化モリブデン等の極圧添加剤を含むグリースが塗布されている。これにより、各プレート１８ａ、１８ｂ、１８ｂ間およびスラスト軸受１８と相手部材（内輪３、外側継手部材１４の環状凹所１７）間の摩擦係数を低減することができる。なお、各プレート１８ａ、１８ｂに刻設された環状溝２１はグリースの溜まり部となり、長期間に亘って潤滑膜を形成して耐摩耗性を保持することができる。   Further, as shown in FIG. 3A, the plates 18a and 18b have a plurality of concentric annular grooves (recesses) 21 formed on both side surfaces thereof by pressing. Further, grease containing an extreme pressure additive such as molybdenum disulfide is applied between the plates 18a and 18b. Thereby, the friction coefficient between each plate 18a, 18b, 18b and between the thrust bearing 18 and the other member (the inner ring 3, the annular recess 17 of the outer joint member 14) can be reduced. In addition, the annular groove 21 carved in each plate 18a, 18b becomes a reservoir for grease, and a lubricating film can be formed over a long period of time to maintain wear resistance.

図３（ｂ）のプレート２２は、（ａ）に例示したプレート１８ａ、１８ｂの変形例で、プレス加工によって、その両側面に多数のディンプル（凹所）２３が複数刻設されている。このディンプル２３も、前述した環状溝２１と同様、グリースの溜まり部となり、長期間に亘って潤滑膜を形成して耐摩耗性を保持することができる。   The plate 22 in FIG. 3B is a modification of the plates 18a and 18b illustrated in FIG. 3A, and a plurality of dimples (recesses) 23 are formed on both side surfaces by pressing. The dimple 23 also serves as a grease reservoir, as in the annular groove 21 described above, and can form a lubricating film over a long period of time to maintain wear resistance.

このスラスト軸受１８は、固定ナット１６によってハブ輪２と外側継手部材１４とを緊締する際、外側継手部材１４の環状凹所１７と内輪３に挟持された状態で圧接され、伝達トルクの変動に伴う周方向の相対変位を許容して、各当接面での摩擦エネルギーの蓄積を分散させることができる。これにより、軸部１３に大きなトルクが負荷されてもスムーズな捩れを許容してスティックスリップ音等の騒音を低減させると共に、それに伴うフレッティング摩耗を防止し、耐久性の向上を図った駆動車輪用軸受装置を提供することができる。   When the hub wheel 2 and the outer joint member 14 are fastened by the fixing nut 16, the thrust bearing 18 is pressed into contact with the annular recess 17 of the outer joint member 14 and the inner ring 3, and the transmission torque varies. The accompanying circumferential relative displacement is allowed, and the accumulation of frictional energy at each contact surface can be dispersed. As a result, even if a large torque is applied to the shaft portion 13, smooth torsion is allowed to reduce noise such as stick-slip noise, and fretting wear associated therewith is prevented, thereby improving durability. A bearing device can be provided.

なお、ここでは、外側継手部材１４の環状凹所１７と内輪３の端面間に複数枚積層されたプレート１８ａ、１８ｂ、１８ｂからなるスラスト軸受１８を例示したが、図示しないが、無論一枚のプレートであっても、伝達トルクの変動に伴う周方向の相対変位を許容してスティックスリップ音等の騒音を低減させることができる。   Here, the thrust bearing 18 composed of a plurality of plates 18a, 18b, 18b laminated between the annular recess 17 of the outer joint member 14 and the end face of the inner ring 3 is illustrated, but it is of course not shown, Even in the case of a plate, it is possible to reduce a noise such as a stick-slip sound by allowing a relative displacement in the circumferential direction accompanying a change in transmission torque.

図４は、本発明に係る駆動車輪用軸受装置の第２の実施形態を示す縦断面図、図５は図４の要部拡大図である。なお、この実施形態は前述した実施形態とスラスト軸受の構成が異なるのみで、その他同一部品同一部位には同じ符号を付してその詳細な説明を省略する。   FIG. 4 is a longitudinal sectional view showing a second embodiment of the bearing device for a drive wheel according to the present invention, and FIG. 5 is an enlarged view of a main part of FIG. In this embodiment, only the configuration of the thrust bearing is different from that of the above-described embodiment, and the same parts are denoted by the same reference numerals and detailed description thereof is omitted.

本実施形態では、外側継手部材１４の肩部１２に環状凹所１７が形成され、玉軸受からなるスラスト軸受２４が介装されている。このスラスト軸受２４は、図５に拡大して示すように、内輪３の端面に当接する外輪２４ａと、この外輪２４ａに複数の転動体（ボール）２４ｃを介して軸方向に対向配置された内輪２４ｂとからなる。このスラスト軸受２４には、転動体２４ｃの周りを取り巻いて一塊の後述する固体潤滑剤２５が固着され、この固体潤滑剤２５によって転動体２４ｃが転動自在に保持されている。   In the present embodiment, an annular recess 17 is formed in the shoulder 12 of the outer joint member 14, and a thrust bearing 24 composed of a ball bearing is interposed. As shown in an enlarged view in FIG. 5, the thrust bearing 24 includes an outer ring 24a that contacts the end surface of the inner ring 3, and an inner ring that is disposed opposite to the outer ring 24a in the axial direction via a plurality of rolling elements (balls) 24c. 24b. A solid lubricant 25, which will be described later, is fixed to the thrust bearing 24 around the rolling element 24c, and the rolling element 24c is held by the solid lubricant 25 so as to freely roll.

本実施形態に用いられる固体潤滑剤２５は、プラスチックグリース、ポリルーブ等の商品名で知られているものであり、平均分子量約１〜５×１０６の超高分子量ポリエチレン９５〜１ｗｔ％と、その超高分子量ポリエチレンのゲル化温度より高い融点を有するグリース５〜９９ｗｔ％とからなる（特公昭６３−２３２３９号公報）。 The solid lubricant 25 used in the present embodiment is known under a trade name such as plastic grease, polyluve, etc., and has an average molecular weight of about 1 to 5 × 10 6 ultrahigh molecular weight polyethylene of 95 to 1 wt%, It consists of 5 to 99 wt% grease having a melting point higher than the gelation temperature of ultrahigh molecular weight polyethylene (Japanese Patent Publication No. 63-23239).

その他の例として、平均分子量約１〜５×１０６の超高分子量ポリエチレン９５〜１ｗｔ％と、その超高分子量ポリエチレンのゲル化温度より高い融点を有するグリース５〜９９ｗｔ％に、粒径１〜１００μｍの前記超高分子量ポリエチレン粉末９５〜１ｗｔ％を混合して前記ゲル化点以上の温度で分散保持させたものでも良い。 Other examples include 95 to 1 wt% of ultrahigh molecular weight polyethylene having an average molecular weight of about 1 to 5 × 10 6 and 5 to 99 wt% of grease having a melting point higher than the gelation temperature of the ultrahigh molecular weight polyethylene. The ultra high molecular weight polyethylene powder (95 to 1 wt%) of 100 μm may be mixed and dispersed and held at a temperature equal to or higher than the gel point.

本実施形態においても、前述したものと同様、このスラスト軸受２４は、固定ナット１６によってハブ輪２と外側継手部材１４とを緊締する際、外側継手部材１４の環状凹所１７と内輪３に挟持された状態で圧接され、伝達トルクの変動に伴う周方向の相対変位を許容して、各当接面での摩擦エネルギーの蓄積を分散させることができる。これにより、軸部１３に大きなトルクが負荷されてもスムーズな捩れを許容してスティックスリップ音等の騒音を低減させると共に、それに伴うフレッティング摩耗を防止し、耐久性の向上を図った駆動車輪用軸受装置を提供することができる。   Also in the present embodiment, the thrust bearing 24 is sandwiched between the annular recess 17 of the outer joint member 14 and the inner ring 3 when the hub wheel 2 and the outer joint member 14 are tightened by the fixing nut 16 in the same manner as described above. It is possible to disperse the accumulation of frictional energy on each contact surface by allowing the relative displacement in the circumferential direction due to the variation of the transmission torque, allowing pressure accumulation in the applied state. As a result, even if a large torque is applied to the shaft portion 13, smooth torsion is allowed to reduce noise such as stick-slip noise, and fretting wear associated therewith is prevented, thereby improving durability. A bearing device can be provided.

なお、ここでは、スラスト軸受２４の転動体２４ｃにボールを使用したスラスト玉軸受を例示したが、これに限らず、例えば、転動体２４ｃに針状ころを用いたスラスト針状ころ軸受であっても良い。また、このスラスト軸受２４は、常時回転することがないため、固定ナット１６の緊締力（軸力）が負荷できる最小限の転動体個数であれば良く、さらに、軸受精度においても、通常のスラスト転がり軸受のような精度は不要である。したがって、例えば、転走面等の研削加工は不要となり、低コスト化が可能となる。   In addition, although the thrust ball bearing which used the ball | bowl for the rolling element 24c of the thrust bearing 24 was illustrated here, it is not restricted to this, For example, it is a thrust needle roller bearing which used the needle roller for the rolling element 24c, Also good. Further, since the thrust bearing 24 does not rotate at all times, it is sufficient that the number of rolling elements that can be loaded with the tightening force (axial force) of the fixing nut 16 is sufficient. Accuracy like a rolling bearing is not required. Therefore, for example, grinding of the rolling surface or the like is unnecessary, and the cost can be reduced.

以上、本発明の実施の形態について説明を行ったが、本発明はこうした実施の形態に何等限定されるものではなく、あくまで例示であって、本発明の要旨を逸脱しない範囲内において、さらに種々なる形態で実施し得ることは勿論のことであり、本発明の範囲は、特許請求の範囲の記載によって示され、さらに特許請求の範囲に記載の均等の意味、および範囲内のすべての変更を含む。   The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment, and is merely an example, and various modifications can be made without departing from the scope of the present invention. Of course, the scope of the present invention is indicated by the description of the scope of claims, and further, the equivalent meanings described in the scope of claims and all modifications within the scope of the scope of the present invention are included. Including.

本発明に係る駆動車輪用軸受装置は、外方部材と、ハブ輪、およびこのハブ輪に圧入された内輪とからなる内方部材と、両部材間に収容された複数の転動体と、内方部材にトルク伝達可能に内嵌された等速自在継手の外側継手部材とを備え、この外側継手部材に締結された固定ナットの緊締力によって軸受の予圧量を管理するようにした駆動車輪用軸受装置に適用できる。   A drive wheel bearing device according to the present invention includes an outer member, an inner member including a hub wheel and an inner ring press-fitted into the hub wheel, a plurality of rolling elements accommodated between the two members, For a drive wheel comprising an outer joint member of a constant velocity universal joint that is fitted to a side member so as to be able to transmit torque, and a bearing preload amount is managed by a tightening force of a fixing nut fastened to the outer joint member Applicable to bearing devices.

本発明に係る駆動車輪用軸受装置の第１の実施形態を示す縦断面図である。It is a longitudinal section showing a 1st embodiment of a bearing device for drive wheels concerning the present invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG. （ａ）は、本発明に係る滑り軸受を示す正面図である。 （ｂ）は、（ａ）の変形例を示す正面図である。(A) is a front view which shows the sliding bearing which concerns on this invention. (B) is a front view which shows the modification of (a). 本発明に係る駆動車輪用軸受装置の第２の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 2nd Embodiment of the bearing apparatus for drive wheels which concerns on this invention. 図４の要部拡大図である。It is a principal part enlarged view of FIG. 従来の駆動車輪用軸受装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the conventional bearing apparatus for drive wheels. （ａ）は、図６の内輪単体を示す部分斜視図である。 （ｂ）は、同上、内輪単体を示す部分斜視図である。(A) is a fragmentary perspective view which shows the inner ring single-piece | unit of FIG. (B) is a partial perspective view showing a single inner ring as in the above.

符号の説明Explanation of symbols

１・・・・・・・・・・・内方部材
２・・・・・・・・・・・ハブ輪
２ａ、３ａ・・・・・・・内側転走面
２ｂ・・・・・・・・・・小径段部
２ｃ、１３ａ・・・・・・セレーション
３、２４ｂ・・・・・・・内輪
４・・・・・・・・・・・車輪取付フランジ
５・・・・・・・・・・・ハブボルト
６、２４ｃ・・・・・・・転動体
７・・・・・・・・・・・保持器
８、９・・・・・・・・・シール
１０・・・・・・・・・・外方部材
１０ａ・・・・・・・・・外側転走面
１０ｂ・・・・・・・・・車体取付フランジ
１１・・・・・・・・・・等速自在継手
１２・・・・・・・・・・肩部
１３・・・・・・・・・・軸部
１４・・・・・・・・・・外側継手部材
１５・・・・・・・・・・雄ねじ
１６・・・・・・・・・・固定ナット
１７・・・・・・・・・・環状凹所
１８、２４・・・・・・・スラスト軸受
１８ａ、１８ｂ、２２・・プレート
１９・・・・・・・・・・凹部
２０・・・・・・・・・・保持環
２０ａ・・・・・・・・・鍔
２０ｂ・・・・・・・・・円筒部
２１・・・・・・・・・・環状溝
２３・・・・・・・・・・ディンプル
２４ａ・・・・・・・・・外輪
２５・・・・・・・・・・固体潤滑剤
５０・・・・・・・・・・駆動車輪用軸受装置
５１・・・・・・・・・・ハブ輪
５１ａ・・・・・・・・・小径段部
５２・・・・・・・・・・複列の転がり軸受
５３・・・・・・・・・・等速自在継手
５４・・・・・・・・・・車輪取付フランジ
５５・・・・・・・・・・外方部材
５５ａ・・・・・・・・・外側転走面
５６・・・・・・・・・・内輪
５６ａ・・・・・・・・・内側転走面
５６ｂ、５６ｃ・・・・・端面
５７・・・・・・・・・・保持器
５８・・・・・・・・・・ボール
５９・・・・・・・・・・肩部
６０・・・・・・・・・・軸部
６１・・・・・・・・・・外側継手部材
６２・・・・・・・・・・雄ねじ
６３・・・・・・・・・・固定ナット
６４・・・・・・・・・・グリース溝
Ｂ・・・・・・・・・・・ブレーキロータ
Ｎ・・・・・・・・・・・ナックル
Ｗ・・・・・・・・・・・車輪 1. Inward member 2 ... Hub wheel 2a, 3a ... Inner rolling surface 2b ... .... Small diameter step 2c, 13a ... Serration 3, 24b ... Inner ring 4 ... Wheel mounting flange 5 ... ... Hub bolts 6, 24c ... Rolling elements 7 ... Retainer 8, 9 ... Seal 10 ... · · · Outer member 10a · · · · Outer rolling surface 10b · · · · Body mounting flange 11 · · · Constant velocity freely Joint 12 ... shoulder 13 ... shaft 14 ... outer joint member 15 ...・ ・ Male screw 16 ・ ・ ・ ・ ・ ・ Fixing nut 17 ・ ・ ・ ・·································································································································・ Holding ring 20a ・ ・ ・ ・ 鍔 20b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cylindrical part 21 ......... Annular groove 23 ... Dimple 24a ... Outer ring 25 ... Solid lubricant 50 ... Drive wheel bearing device 51 ... ... Hub wheel 51a ... Small diameter step 52 ... Double row rolling bearing 53 ... Constant velocity universal joint 54 ..... Wheel mounting flange 55 ..... Outer member 55a ..... Outside rolling surface 56 ... .... Inner ring 56a ... Side rolling surfaces 56b, 56c ... End face 57 ... Cage 58 ... Ball 59 ... Shoulder Portion 60 ... Shaft 61 ... Outer joint member 62 ... Male thread 63 ...・ Fixing nut 64 ... Grease groove B ... Brake rotor N ... Knuckle W ... ·····Wheel

Claims (2)

内周に複列の外側転走面が形成された外方部材と、
一端部に車輪取付フランジを一体に有し、外周に軸方向に延びる円筒状の小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、
前記両転走面間に転動自在に収容された複列の転動体と、
前記内方部材にトルク伝達可能に内嵌される軸部を一体に有する等速自在継手の外側継手部材とを備え、
この外側継手部材の軸部に締結された固定ナットによって、前記内方部材に突き合わせ状態で前記ハブ輪に対して前記外側継手部材が軸方向に分離可能に締結された駆動車輪用軸受装置において、
前記外側継手部材の肩部に環状凹所が形成され、この環状凹所に焼入れ硬化された複数枚のプレートが積層されて前記内方部材に当接されると共に、前記環状凹所に鋼板製の保持環が収容され、この保持環が、前記環状凹所に外嵌される円筒部と、この円筒部の一端に径方向外方に延びる鍔を有し、この鍔を前記プレートに係合させることによって当該プレートが一体に保持されていることを特徴とする駆動車輪用軸受装置。 An outer member having a double row outer raceway formed on the inner periphery;
A hub wheel having a wheel mounting flange integrally formed at one end and a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub wheel An inner member formed with a double-row inner rolling surface facing the double-row outer rolling surface;
A double row rolling element accommodated between the rolling surfaces so as to roll freely;
An outer joint member of a constant velocity universal joint integrally having a shaft portion fitted in the inner member so as to be able to transmit torque;
In the drive wheel bearing device in which the outer joint member is fastened so as to be separable in the axial direction with respect to the hub wheel in a state of being abutted against the inner member by a fixing nut fastened to the shaft portion of the outer joint member.
An annular recess is formed in the shoulder of the outer joint member, and a plurality of hardened and hardened plates are laminated in the annular recess and contacted with the inner member, and the annular recess is made of a steel plate. The retaining ring has a cylindrical portion that is externally fitted in the annular recess, and a flange that extends radially outward at one end of the cylindrical portion, and engages the flange with the plate. The drive wheel bearing device is characterized in that the plate is held integrally . 前記プレートの少なくとも一側面に複数の凹所が形成され、かつ前記プレートの側面に潤滑剤が塗布されている請求項１に記載の駆動車輪用軸受装置。The drive wheel bearing device according to claim 1, wherein a plurality of recesses are formed on at least one side surface of the plate, and a lubricant is applied to the side surface of the plate.
JP2005095820A 2005-03-29 2005-03-29 Drive wheel bearing device Expired - Fee Related JP4557223B2 (en)

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JP4557223B2 true JP4557223B2 (en) 2010-10-06

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CN101980877B (en) * 2008-03-25 2014-05-07 Ntn株式会社 Bearing device for driving wheel
US11035411B2 (en) * 2017-07-14 2021-06-15 Eagle Industry Co., Ltd. Sliding parts
US11053975B2 (en) 2017-05-19 2021-07-06 Eagle Industry Co., Ltd Sliding component
US11248707B2 (en) 2017-05-19 2022-02-15 Eagle Industry Co., Ltd Sliding component
US11708911B2 (en) 2017-10-03 2023-07-25 Eagle Industry Co., Ltd. Sliding component

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JP5200382B2 (en) * 2007-01-18 2013-06-05 株式会社ジェイテクト Drive wheel hub unit
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CN101980877B (en) * 2008-03-25 2014-05-07 Ntn株式会社 Bearing device for driving wheel
US11053975B2 (en) 2017-05-19 2021-07-06 Eagle Industry Co., Ltd Sliding component
US11248707B2 (en) 2017-05-19 2022-02-15 Eagle Industry Co., Ltd Sliding component
US11035411B2 (en) * 2017-07-14 2021-06-15 Eagle Industry Co., Ltd. Sliding parts
US11708911B2 (en) 2017-10-03 2023-07-25 Eagle Industry Co., Ltd. Sliding component

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