JP2005081868A - Drive wheel hub unit - Google Patents

Drive wheel hub unit Download PDF

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JP2005081868A
JP2005081868A JP2003312963A JP2003312963A JP2005081868A JP 2005081868 A JP2005081868 A JP 2005081868A JP 2003312963 A JP2003312963 A JP 2003312963A JP 2003312963 A JP2003312963 A JP 2003312963A JP 2005081868 A JP2005081868 A JP 2005081868A
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Prior art keywords
hub
spline
constant velocity
ring
velocity joint
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JP2003312963A
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Japanese (ja)
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Takeo Okuma
健夫 大熊
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NSK Ltd
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NSK Ltd
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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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F16D1/116—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/22—Vibration damping

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To reduce generation of noise by suppressing initial rattle in a circumference direction of a spline coupling of a hub and a constant velocity joint. <P>SOLUTION: A caulking part 30 is formed by plastically deforming a part projecting out of an inner end surface of an inner ring 5 radially outward at an inner end part of the hub 4 and an inner end surface of the inner ring 5 is pressed by the caulking part 30. A locking groove 31 is formed on an outer circumference surface in vicinity of an outer end of an male spline shaft 17 over whole circumference. A retaining ring 32 is locked in the annular locking groove 31. A female spline 14 and a male spline 17 are parallel spline and a resin coating layer L (or plating layer L of soft metal) is applied on an outer circumference surface of the male spline 17. Resin coating layer (or plating layer L of soft metal ) can be applied on an inner circumference surface side of the female spline. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、車両の懸下装置に対して駆動輪を回転自在に支持する駆動輪用ハブユニットに関する。   The present invention relates to a drive wheel hub unit that rotatably supports a drive wheel with respect to a vehicle suspension device.

車両の独立懸架式サスペンション装置に対して、車輪を回転自在に支持するために、ハブユニットが用いられ、特に駆動輪を支持するものにおいては、そのハブユニットに支持された軸に、等速ジョイントが一体的に設けられている。   A hub unit is used to rotatably support a wheel with respect to an independent suspension system of a vehicle. In particular, in a case of supporting a driving wheel, a constant velocity joint is connected to a shaft supported by the hub unit. Are provided integrally.

駆動輪用ハブユニットに於いては、例えば、特許文献１に示すように、ハブユニットは、外輪の内径側に、ハブ及び内輪を複数個の転動体を介して回転自在に支持している。   In the hub unit for driving wheels, for example, as shown in Patent Document 1, the hub unit rotatably supports the hub and the inner ring via a plurality of rolling elements on the inner diameter side of the outer ring.

図３は、従来に係る駆動輪用ハブユニットの断面図である。ハブユニット１は、外輪３の内径側にハブ４及び内輪５を複数個の転動体６を介して回転自在に支持している。   FIG. 3 is a cross-sectional view of a conventional drive wheel hub unit. The hub unit 1 supports a hub 4 and an inner ring 5 on a radially inner side of an outer ring 3 via a plurality of rolling elements 6 so as to be rotatable.

外輪３は、その外周面に設けた支持フランジ７により懸架装置を構成するナックル（図示略）に結合固定している。   The outer ring 3 is coupled and fixed to a knuckle (not shown) constituting a suspension device by a support flange 7 provided on the outer peripheral surface thereof.

外輪３の内周面には、複列の外輪軌道９を設けており、この外輪３の内径側にハブ４及び内輪５を支持している。   A double row outer ring raceway 9 is provided on the inner peripheral surface of the outer ring 3, and the hub 4 and the inner ring 5 are supported on the inner diameter side of the outer ring 3.

ハブ４は、取り付け時に車体の外側に位置する外端部分外周に車輪等を取り付けるための取付フランジ１０を設けている。   The hub 4 is provided with an attachment flange 10 for attaching a wheel or the like to the outer periphery of the outer end portion located outside the vehicle body when attached.

ハブ４の外周面の中間部に、第１内輪軌道１１を形成し、同じく内端部に形成した円筒状の小径段部１２には、内輪５を外嵌固定し、その内輪５には、第２内輪軌道１３を形成している。ハブ４の内径部には、雌スプライン１４を設けている。   A first inner ring raceway 11 is formed at an intermediate portion of the outer peripheral surface of the hub 4, and an inner ring 5 is fitted and fixed to a cylindrical small-diameter step portion 12 formed at the inner end, and the inner ring 5 includes A second inner ring raceway 13 is formed. A female spline 14 is provided on the inner diameter portion of the hub 4.

等速ジョイント２は、等速ジョイント用外輪１５と、等速ジョイント用内輪１６と、雄スプライン軸１７とを備えており、等速ジョイント用外輪１５と雄スプライン軸１７とにより駆動軸部材１８を構成している。   The constant velocity joint 2 includes a constant velocity joint outer ring 15, a constant velocity joint inner ring 16, and a male spline shaft 17, and the constant velocity joint outer ring 15 and the male spline shaft 17 form a drive shaft member 18. It is composed.

この雄スプライン軸１７は、駆動軸部材１８の外端部に設けられており、雌スプライン１４と係合自在であり、また、等速ジョイント用外輪１５は、駆動軸部材１８の内端部に設けられて、この等速ジョイント用外輪１５の内周面の円周方向複数箇所には、外側係合溝１９を、それぞれこの円周方向に対し直角方向、即ち軸線方向に形成している。   The male spline shaft 17 is provided at the outer end portion of the drive shaft member 18 and is freely engageable with the female spline 14, and the constant velocity joint outer ring 15 is disposed at the inner end portion of the drive shaft member 18. Provided, outer engagement grooves 19 are formed at a plurality of positions in the circumferential direction on the inner circumferential surface of the outer ring 15 for constant velocity joints in a direction perpendicular to the circumferential direction, that is, in the axial direction.

等速ジョイント用内輪１６は、内径部に雌スプライン２０を形成しており、その外周面には上記外側係合溝１９に対向する内側係合溝２１を、この円周方向に対し直角方向、即ち軸線方向に形成している。これら内側係合溝２１と外側係合溝１９との間に、ボール２２を保持器２３により保持した状態で溝に沿って転動自在に設けている。   The constant velocity joint inner ring 16 has a female spline 20 formed on the inner diameter portion, and an inner engagement groove 21 facing the outer engagement groove 19 is formed on the outer peripheral surface thereof in a direction perpendicular to the circumferential direction. That is, they are formed in the axial direction. Between the inner engagement groove 21 and the outer engagement groove 19, a ball 22 is provided so as to roll along the groove while being held by a cage 23.

等速ジョイント２と駆動輪支持用のハブユニット１とは、雄スプライン軸１７をハブ４の雌スプライン１４に、内側から外側に向け挿通する。その後、雄スプライン軸１７の外端部で、ハブ４の外端面から突出した部分に設けた雄ネジ部２４にナット２５を螺合し、更に緊締することにより、互いに結合固定する。この状態では、内輪５の側端面は、等速ジョイント用外輪１５の外端面に当接し抜け止めがなされる。このとき同時に、各転動体６には、適正な予圧が付与される。   The constant velocity joint 2 and the hub unit 1 for driving wheel support are inserted through the male spline shaft 17 into the female spline 14 of the hub 4 from the inside to the outside. Thereafter, a nut 25 is screwed into a male screw portion 24 provided at a portion protruding from the outer end surface of the hub 4 at the outer end portion of the male spline shaft 17 and further fastened to be coupled and fixed to each other. In this state, the side end surface of the inner ring 5 is in contact with the outer end surface of the outer ring 15 for constant velocity joint, and is prevented from coming off. At the same time, an appropriate preload is applied to each rolling element 6.

このように、等速ジョイントの締結は、その端面部に切られた雄ネジ部にナットを規定のトルクにより締め上げ、そのナット締付により、同時に軸受の予圧荷重を、適性値にコントロールするのが一般的な方法である。
特開２００２−２００９０２号公報 In this way, the constant velocity joint is fastened by tightening the nut to the male threaded portion cut at the end face with a specified torque, and simultaneously controlling the preload load of the bearing to an appropriate value by tightening the nut. Is a common method.
JP 2002-200902 A

ところで、特許文献１では、ナットによる駆動輪用ハブと等速ジョイントとの締結に代えて、軸受の予圧荷重を、ハブの一部を加締めることにより、軸受の予圧荷重を調整し、ハブと等速ジョイントの締結においては、ナットを使わないで止め輪等のクリップにより、ハブと等速ジョイントを締結するハブユニット軸受が提案されている。   By the way, in Patent Document 1, instead of fastening the drive wheel hub and the constant velocity joint with nuts, the bearing preload is adjusted by tightening a part of the hub by tightening the bearing preload. In fastening constant velocity joints, a hub unit bearing has been proposed in which a hub and a constant velocity joint are fastened by a clip such as a retaining ring without using a nut.

また、ハブと等速ジョイントのスプライン結合において、等速ジョイント側のスプライン形状は、平行スプラインと、ねじりスプラインの２種類がある。   In spline connection between the hub and the constant velocity joint, there are two types of spline shapes on the constant velocity joint side: a parallel spline and a torsional spline.

ハブと等速ジョイントの結合の容易さ、又は、使用中のスプライン部の摩耗進行を考慮すると、平行スプラインの方が好ましい。   Considering the ease of coupling between the hub and the constant velocity joint or the progress of wear of the spline part in use, the parallel spline is preferred.

しかしながら、この平行スプライン結合では、ハブ側、及び等速ジョイント側の加工精度に起因して、円周方向の初期のガタ付きを抑えることが困難であり、これに伴って、異音が発生するといった虞れがある。   However, in this parallel spline connection, it is difficult to suppress the initial rattling in the circumferential direction due to the processing accuracy on the hub side and the constant velocity joint side, and accordingly, abnormal noise is generated. There is a fear.

本発明は、上述したような事情に鑑みてなされたものであって、ハブと等速ジョイントのスプライン結合の円周方向の初期のガタ付きを抑制することができ、これに伴って、異音の発生を低減することができる駆動輪用ハブユニットを提供することを目的とする。   The present invention has been made in view of the circumstances as described above, and can suppress the initial rattling in the circumferential direction of the spline coupling of the hub and the constant velocity joint. An object of the present invention is to provide a hub unit for a drive wheel that can reduce the occurrence of this.

上記の目的を達成するため、本発明の請求項１に係る駆動輪用ハブユニットは、車体側に取り付けられ、内周に、外軌道が形成された外輪と、
外端に、車輪を取り付けるためのフランジを、軸方向中央の外周面に、直接又は間接に軸受の内軌道を、内周に、雌スプラインを有するハブと、
外周に、軸受の内軌道を有し、ハブに外嵌してハブに固定される内輪と、
内輪及び外輪のそれぞれの軌道面間で転動自在に介在する複列の転動体と、
外端の外周面に、ハブの雌スプラインと嵌合する雄スプラインを有する等速ジョイントと、を具備する駆動輪用ハブユニットにおいて、
前記雌スプライン及び雄スプラインは、平行スプラインであって、両スプラインの少なくとも一方に、樹脂のコーティング、又は軟金属のメッキが施してあることを特徴とする。 In order to achieve the above object, a drive wheel hub unit according to claim 1 of the present invention is attached to a vehicle body side, an outer ring having an outer track formed on an inner periphery thereof,
A hub for attaching a wheel to the outer end, an axially central outer peripheral surface, directly or indirectly an inner race of the bearing, and an inner peripheral hub, a female spline;
An inner ring which has an inner raceway of the bearing on the outer periphery and is fitted to the hub and fixed to the hub;
A double row rolling element interposed between the raceway surfaces of the inner ring and the outer ring so as to freely roll;
On the outer peripheral surface of the outer end, a constant velocity joint having a male spline that fits with the female spline of the hub, and a drive wheel hub unit comprising:
The female spline and the male spline are parallel splines, and at least one of the two splines is coated with a resin coating or a soft metal plating.

以上説明したように、本発明によれば、雌スプライン及び雄スプラインは、平行スプラインであって、両スプラインの少なくとも一方に、樹脂のコーティング、又は軟金属のメッキが施してある。そのため、等速ジョイントの雄スプラインがハブの雌スプラインよりやや大きい場合、等速ジョイントの挿入時、ハブの雌スプライン（又は等速ジョイントの雄スプライン）の周面から、樹脂又は軟金属が削り取られ、等速ジョイントの挿入を完了したときには、ガタ付きのないスプライン結合とすることができ、これに伴って、円周方向のガタ付きの減少により、スプライン結合面から発生する異音の低減や、運転フィーリングの低下の防止を図ることができる。   As described above, according to the present invention, the female spline and the male spline are parallel splines, and at least one of the two splines is coated with a resin coating or a soft metal plating. Therefore, if the male spline of the constant velocity joint is slightly larger than the female spline of the hub, the resin or soft metal is scraped from the peripheral surface of the hub's female spline (or the male spline of the constant velocity joint) when the constant velocity joint is inserted. When the insertion of the constant velocity joint is completed, it can be splined with no backlash, and along with this, by reducing the backlash in the circumferential direction, the noise generated from the spline connecting surface can be reduced, It is possible to prevent a decrease in driving feeling.

以下、本発明の実施の形態に係る車両の駆動輪用ハブユニットを図面を参照しつつ説明する。   Hereinafter, a drive wheel hub unit for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.

図１は、本発明の実施の形態に係る車両の駆動輪用ハブユニットの断面図である。図２は、図１に示した雄スプラインの要部の断面図である。   FIG. 1 is a sectional view of a drive wheel hub unit for a vehicle according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a main part of the male spline shown in FIG.

図１に示すように、ハブユニット１は、外輪３の内径側にハブ４及び内輪５を複数個の転動体６を介して回転自在に支持している。   As shown in FIG. 1, the hub unit 1 supports a hub 4 and an inner ring 5 on a radially inner side of an outer ring 3 through a plurality of rolling elements 6 so as to be rotatable.

外輪３は、その外周面に設けた支持フランジ７により懸架装置を構成するナックル（図示略）に結合固定している。   The outer ring 3 is coupled and fixed to a knuckle (not shown) constituting a suspension device by a support flange 7 provided on the outer peripheral surface thereof.

外輪３の内周面には、複列の外輪軌道９を設けており、この外輪３の内径側にハブ４及び内輪５を支持している。   A double row outer ring raceway 9 is provided on the inner peripheral surface of the outer ring 3, and the hub 4 and the inner ring 5 are supported on the inner diameter side of the outer ring 3.

ハブ４は、取り付け時に車体の外側に位置する外端部分外周に車輪等を取り付けるための取付フランジ１０を設けている。   The hub 4 is provided with an attachment flange 10 for attaching a wheel or the like to the outer periphery of the outer end portion located outside the vehicle body when attached.

ハブ４の外周面の中間部に、第１内輪軌道１１を形成し、同じく内端部に形成した円筒状の小径段部１２には、内輪５を外嵌固定し、その内輪５には、第２内輪軌道１３を形成している。ハブ４の内径部には、雌スプライン１４を設けている。   A first inner ring raceway 11 is formed at an intermediate portion of the outer peripheral surface of the hub 4, and an inner ring 5 is fitted and fixed to a cylindrical small-diameter step portion 12 formed at the inner end, and the inner ring 5 includes A second inner ring raceway 13 is formed. A female spline 14 is provided on the inner diameter portion of the hub 4.

等速ジョイント２は、等速ジョイント用外輪１５と、等速ジョイント用内輪１６と、雄スプライン軸１７とを備えており、等速ジョイント用外輪１５と雄スプライン軸１７とにより駆動軸部材１８を構成している。   The constant velocity joint 2 includes a constant velocity joint outer ring 15, a constant velocity joint inner ring 16, and a male spline shaft 17, and the constant velocity joint outer ring 15 and the male spline shaft 17 form a drive shaft member 18. It is composed.

この雄スプライン軸１７は、駆動軸部材１８の外端部に設けられており、雌スプライン１４と係合自在であり、また、等速ジョイント用外輪１５は、駆動軸部材１８の内端部に設けられて、この等速ジョイント用外輪１５の内周面の円周方向複数箇所には、外側係合溝１９を、それぞれこの円周方向に対し直角方向、即ち軸線方向に形成している。   The male spline shaft 17 is provided at the outer end portion of the drive shaft member 18 and is freely engageable with the female spline 14, and the constant velocity joint outer ring 15 is disposed at the inner end portion of the drive shaft member 18. Provided, outer engagement grooves 19 are formed at a plurality of positions in the circumferential direction on the inner circumferential surface of the outer ring 15 for constant velocity joints in a direction perpendicular to the circumferential direction, that is, in the axial direction.

等速ジョイント用内輪１６は、内径部に雌スプライン２０を形成しており、その外周面には上記外側係合溝１９に対向する内側係合溝２１を、この円周方向に対し直角方向、即ち軸線方向に形成している。これら内側係合溝２１と外側係合溝１９との間に、ボール２２を保持器２３により保持した状態で溝に沿って転動自在に設けている。   The constant velocity joint inner ring 16 has a female spline 20 formed on the inner diameter portion, and an inner engagement groove 21 facing the outer engagement groove 19 is formed on the outer peripheral surface thereof in a direction perpendicular to the circumferential direction. That is, they are formed in the axial direction. Between the inner engagement groove 21 and the outer engagement groove 19, a ball 22 is provided so as to roll along the groove while being held by a cage 23.

ハブ４の内端に形成した小径段部１２に、内輪５を外嵌している。ハブ４の内端に加締め部３０を形成している。即ち、ハブ４の内端部で内輪５の内端面から突出した部分を、径方向外方に塑性変形させて、加締め部３０を形成し、この加締め部３０により、内輪５の内端面を押圧している。   An inner ring 5 is externally fitted to a small diameter step portion 12 formed at the inner end of the hub 4. A caulking portion 30 is formed at the inner end of the hub 4. That is, a portion protruding from the inner end surface of the inner ring 5 at the inner end portion of the hub 4 is plastically deformed radially outward to form a caulking portion 30, and the inner end surface of the inner ring 5 is formed by the caulking portion 30. Is pressed.

雄スプライン軸１７の外端近傍の外周面に、係止溝３１が全周に亙って形成してある。この環状の係止溝３１には、止め輪３２が係止してあり、これにより、雄スプライン軸１７が雌スプライン１４から抜け出るのを防止している。   On the outer peripheral surface near the outer end of the male spline shaft 17, a locking groove 31 is formed over the entire periphery. A retaining ring 32 is engaged with the annular locking groove 31, thereby preventing the male spline shaft 17 from coming out of the female spline 14.

尚、止め輪３２は、雄スプライン軸１７を雌スプライン１４内に挿入するのに先立って、係止溝３１に装着しておく。雄スプライン軸１７を雌スプライン１４内に挿入する際に、止め輪３２は、その直径を弾性的に縮めつつ、雌スプライン孔１４内を通過する。止め輪３２は、係止段部３４に整合した状態でその直径が弾性的に復元し、これにより、係止段部３４と係止溝３１との間に装着される。   The retaining ring 32 is mounted in the locking groove 31 prior to inserting the male spline shaft 17 into the female spline 14. When the male spline shaft 17 is inserted into the female spline 14, the retaining ring 32 passes through the female spline hole 14 while elastically reducing its diameter. The retaining ring 32 is elastically restored in diameter in a state of being aligned with the locking step portion 34, and is thereby mounted between the locking step portion 34 and the locking groove 31.

ハブ４の中心孔の外端側開口部は、キャップ３３により塞いでいる。これにより雨水等の異物が入り込む事を防止している。   The opening on the outer end side of the center hole of the hub 4 is closed with a cap 33. This prevents foreign matter such as rainwater from entering.

さて、本実施の形態では、雌スプライン１４及び雄スプライン１７は、平行スプラインであって、図２に示すように、雄スプライン１７の外周面には、樹脂のコーティング層Ｌ（又は軟金属のメッキ層Ｌ）が施してある。但し、雌スプライン１４の内周面側に、樹脂のコーティング層Ｌ（又は軟金属のメッキ層Ｌ）が施してあってもよい。   In the present embodiment, the female spline 14 and the male spline 17 are parallel splines. As shown in FIG. 2, the resin coating layer L (or soft metal plating) is formed on the outer peripheral surface of the male spline 17. Layer L) is applied. However, a resin coating layer L (or a soft metal plating layer L) may be provided on the inner peripheral surface side of the female spline 14.

樹脂のコーティング層Ｌ（又は軟金属のメッキ層Ｌ）の厚さは、好適には、５〜２０ｕｍである。   The thickness of the resin coating layer L (or the soft metal plating layer L) is preferably 5 to 20 μm.

コーティング剤としては、好適には、樹脂（プラスティック、フッ素）であり、軟金属メッキとしては、好適には、銅、亜鉛、それらを含む合金である。   The coating agent is preferably a resin (plastic, fluorine), and the soft metal plating is preferably copper, zinc, or an alloy containing them.

従って、等速ジョイント２の雄スプライン１７がハブ４の雌スプライン１４よりやや大きい場合、等速ジョイント２の挿入時、ハブ４の雌スプライン１４（又は等速ジョイント２の雄スプライン１７）の周面から、樹脂又は軟金属が削り取られ、等速ジョイント２の挿入を完了したときには、ガタ付きのないスプライン結合とすることができ、これに伴って、円周方向のガタ付きの減少により、スプライン結合面から発生する異音の低減や、運転フィーリングの低下の防止を図ることができる。   Therefore, when the male spline 17 of the constant velocity joint 2 is slightly larger than the female spline 14 of the hub 4, the peripheral surface of the female spline 14 of the hub 4 (or the male spline 17 of the constant velocity joint 2) when the constant velocity joint 2 is inserted. When the resin or soft metal is scraped off and the insertion of the constant velocity joint 2 is completed, the spline connection without backlash can be obtained, and the spline connection is reduced due to the decrease in the backlash in the circumferential direction. It is possible to reduce the noise generated from the surface and prevent the driving feeling from being lowered.

なお、本発明は、上述した実施の形態に限定されず、種々変形可能である。   In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible.

本発明の実施の形態に係る車両の駆動輪用ハブユニットの断面図である。It is sectional drawing of the hub unit for driving wheels of the vehicle which concerns on embodiment of this invention. 図１に示した雄スプラインの要部の断面図である。It is sectional drawing of the principal part of the male spline shown in FIG. 従来に係る駆動輪用ハブユニットの断面図である。It is sectional drawing of the hub unit for drive wheels which concerns on the past.

符号の説明Explanation of symbols

１ ハブユニット
２ 等速ジョイント
３ 外輪
４ ハブ
５ 内輪
６ 転動体
７ 取付部
８ ナックル
９ 外輪軌道
１０ 取付フランジ
１１ 第１内輪軌道
１２ 小径段部
１３ 第１内輪軌道
１４ 雌スプライン
１５ 等速ジョイント用外輪
１６ 等速ジョイント用内輪
１７ 雄スプライン軸
１８ 駆動軸部材
１９ 外側係合溝
２０ 雌スプライン
２１ 内側係合溝
２２ ボール
２３ 保持器
２４ 雄ネジ部
２５ ナット
３０ 加締め部
３１ 係止溝
３２ 止め輪
３３ キャップ
３４ 係止段部
Ｌ 樹脂のコーティング層（又は軟金属のメッキ層） Reference Signs List 1 hub unit 2 constant velocity joint 3 outer ring 4 hub 5 inner ring 6 rolling element 7 mounting portion 8 knuckle 9 outer ring raceway 10 mounting flange 11 first inner ring raceway 12 small diameter step portion 13 first inner ring raceway 14 female spline 15 outer ring for constant velocity joint 16 Inner ring for constant velocity joint 17 Male spline shaft 18 Drive shaft member 19 Outer engagement groove 20 Female spline 21 Inner engagement groove 22 Ball 23 Cage 24 Male thread portion 25 Nut 30 Fastening portion 31 Locking groove 32 Retaining ring 33 Cap 34 Locking step L Resin coating layer (or soft metal plating layer)

Claims (1)

車体側に取り付けられ、内周に、外軌道が形成された外輪と、
外端に、車輪を取り付けるためのフランジを、軸方向中央の外周面に、直接又は間接に軸受の内軌道を、内周に、雌スプラインを有するハブと、
外周に、軸受の内軌道を有し、ハブに外嵌してハブに固定される内輪と、
内輪及び外輪のそれぞれの軌道面間で転動自在に介在する複列の転動体と、
外端の外周面に、ハブの雌スプラインと嵌合する雄スプラインを有する等速ジョイントと、を具備する駆動輪用ハブユニットにおいて、
前記雌スプライン及び雄スプラインは、平行スプラインであって、両スプラインの少なくとも一方に、樹脂のコーティング、又は軟金属のメッキが施してあることを特徴とする駆動輪用ハブユニット。 An outer ring attached to the vehicle body and having an outer track formed on the inner periphery;
A hub for attaching a wheel to the outer end, an axially central outer peripheral surface, directly or indirectly an inner race of the bearing, and an inner peripheral hub, a female spline;
An inner ring which has an inner raceway of the bearing on the outer periphery and is fitted to the hub and fixed to the hub;
A double row rolling element interposed between the raceway surfaces of the inner ring and the outer ring so as to freely roll;
On the outer peripheral surface of the outer end, a constant velocity joint having a male spline that fits with the female spline of the hub, and a drive wheel hub unit comprising:
The female spline and the male spline are parallel splines, and at least one of the two splines is coated with a resin coating or a soft metal plating.
JP2003312963A 2003-09-04 2003-09-04 Drive wheel hub unit Pending JP2005081868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003312963A JP2005081868A (en) 2003-09-04 2003-09-04 Drive wheel hub unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003312963A JP2005081868A (en) 2003-09-04 2003-09-04 Drive wheel hub unit

Publications (1)

Publication Number Publication Date
JP2005081868A true JP2005081868A (en) 2005-03-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008078511A1 (en) * 2006-12-27 2008-07-03 Ntn Corporation Bearing device for wheel
EP2163402A1 (en) * 2007-06-01 2010-03-17 NTN Corporation Bearing device for wheel
JP2013189195A (en) * 2007-10-22 2013-09-26 Ntn Corp Bearing device for wheel, and manufacturing method therefor
WO2014069137A1 (en) * 2012-10-30 2014-05-08 Ntn株式会社 Bearing for wheel, and bearing device for wheel
US8801294B2 (en) 2007-09-18 2014-08-12 Ntn Corporation Bearing device for a wheel

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008078511A1 (en) * 2006-12-27 2008-07-03 Ntn Corporation Bearing device for wheel
US8382378B2 (en) 2006-12-27 2013-02-26 Ntn Corporation Wheel bearing device
EP2163402A1 (en) * 2007-06-01 2010-03-17 NTN Corporation Bearing device for wheel
EP2163402A4 (en) * 2007-06-01 2017-05-03 NTN Corporation Bearing device for wheel
US8801294B2 (en) 2007-09-18 2014-08-12 Ntn Corporation Bearing device for a wheel
US9308777B2 (en) 2007-09-18 2016-04-12 Ntn Corporation Bearing device for a wheel
JP2013189195A (en) * 2007-10-22 2013-09-26 Ntn Corp Bearing device for wheel, and manufacturing method therefor
WO2014069137A1 (en) * 2012-10-30 2014-05-08 Ntn株式会社 Bearing for wheel, and bearing device for wheel
JP2014111425A (en) * 2012-10-30 2014-06-19 Ntn Corp Bearing for wheel and bearing device
CN104755276A (en) * 2012-10-30 2015-07-01 Ntn株式会社 Bearing for wheel, and bearing device for wheel
US9393836B2 (en) 2012-10-30 2016-07-19 Ntn Corporation Bearing for wheel, and bearing device for wheel

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