CN101641225B - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
CN101641225B
CN101641225B CN2008800094425A CN200880009442A CN101641225B CN 101641225 B CN101641225 B CN 101641225B CN 2008800094425 A CN2008800094425 A CN 2008800094425A CN 200880009442 A CN200880009442 A CN 200880009442A CN 101641225 B CN101641225 B CN 101641225B
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CN
China
Prior art keywords
protuberance
wheel hub
hub ring
wheel
axial region
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CN2008800094425A
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Chinese (zh)
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CN101641225A (en
Inventor
鸟居晃
河村浩志
山内清茂
小泽仁博
中川亮
浅野祐一
梅木田光
藏久昭
友上真
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NTN Corp
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NTN Corp
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Priority claimed from JP2007131815A external-priority patent/JP2008285000A/en
Priority claimed from JP2007131813A external-priority patent/JP4294704B2/en
Priority claimed from JP2007142492A external-priority patent/JP5301114B2/en
Priority claimed from JP2007150736A external-priority patent/JP2008303943A/en
Application filed by NTN Corp filed Critical NTN Corp
Priority claimed from PCT/JP2008/054660 external-priority patent/WO2008114698A1/en
Publication of CN101641225A publication Critical patent/CN101641225A/en
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Publication of CN101641225B publication Critical patent/CN101641225B/en
Expired - Fee Related legal-status Critical Current
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Abstract

A bearing device for a wheel, in which circumferential play is suppressed, which facilitates connection between a hub ring and an outer coupling member, in which a reduction in NVH characteristics due to play at a joint between the hub ring and the constant velocity universal joint and by play between a bearing outer member and a knuckle is prevented, and which performs highly accurate transmission of rotational torque. The bearing device has a groove-ridge fitting structure (M) by which the hub ring (1) and a shaft section (12) of the outer coupling member of the constant velocity universal joint (3) are integrated together, and the shaft section (12) is fitted in a hole (22) of the hub ring (1). In the groove-ridge fitting structure (M), ridges (35) on the outer diameter surface of the shaft section (12) and grooves (36) in the inner diameter surface (37) of the hub ring (1) are fitted to each other in a fitting contact portion (38), and the ridges (35) and the grooves (36) are in intimate contact with each other in the entire fitting contact portion (38).

Description

Bearing apparatus for wheel
Technical field
The present invention relates to a kind ofly on the vehicles such as automobile, rotation of wheel is supported on the bearing apparatus for wheel that car body is used freely.
Background technology
Bearing apparatus for wheel is called as the structure of many rows antifriction-bearing box of the first generation from independent use, developing into outside, the side component one has the second generation of car body mounting flange, and then develop into the third generations that the periphery that has a wheel hub ring of wheel mounting flange in one is formed with an inner track face of many row's antifriction-bearing boxs, finally develop until at the integrated Constant velocity joint of wheel hub ring, and be formed with the 4th generations of another inner track face of many row's antifriction-bearing boxs in the periphery of the lateral joint parts that consist of this constant speed Hooke's coupling.
For example, put down in writing the bearing apparatus for wheel that is called as the third generation in the patent documentation 1.As shown in figure 22, the bearing apparatus for wheel that is called as the third generation possesses: have the flange 101 that extends along the external diameter direction wheel hub ring 102, with lateral joint parts 103 be fixed in this wheel hub ring 102 Constant velocity joint 104, have the antifriction-bearing box of the outside parts 105 of the outer circumferential side that is disposed at wheel hub ring 102.
Constant velocity joint 104 possesses: above-mentioned lateral joint parts 103, be disposed at inner contact parts 108 in the cup-shaped portion 107 of these lateral joint parts 103, be disposed at ball 109 between these inner contact parts 108 and the lateral joint parts 103, keep the retainer 110 of this ball 109.In addition, be formed with spline part 111 at the inner peripheral surface of the centre hole of inner contact parts 108, be inserted with the end spline part of not shown axle at this centre hole, and make the spline part 111 of inner contact parts 108 sides and the spline part engaging of axle side.
In addition, wheel hub ring 102 has a section 113 and above-mentioned flange 101, at the outstanding control part 115 that is provided with the short tubular that not shown wheel and brake disc are installed of the outer face 114 (end face of joint opposition side) of flange 101.In addition, control part 115 is made of the First 115a in large footpath and second 115b of path, at the upper outside brake disc that is embedded with of First 115a, at second upper outside wheel that is embedded with of 115b.
And, be provided with notch 116 at the outer peripheral face of cup-shaped portion 107 side ends of cylinder section 113, inner ring 117 is embedded in this notch 116.Near the flange of the outer peripheral face of the cylinder section 113 of wheel hub ring 102, be provided with the first inner track face 118, be provided with the second inner track face 119 at the outer peripheral face of inner ring 117.In addition, be provided with bolt mounting holes 112 at the flange 101 of wheel hub ring 102, will be installed on this bolt mounting holes 112 be used to the boss bolt that makes wheel and brake disc be fixed in this flange 101.
The two exclusive siding track faces 120,121 that are provided with in interior week at the outside of antifriction-bearing box parts 105 simultaneously, are provided with flange (car body mounting flange) 132 in its periphery.And the first outer side track face 120 of outside parts 105 and the first inner track face 118 of wheel hub ring 102 are opposite, and the second outer side track face 121 of outside parts 105 and the orbital plane 119 of inner ring 117 are opposite, have clamped rolling body 122 between them.That is, the inner part of antifriction-bearing box is made of the part of the outer diametric plane of this inner ring 117 and wheel hub ring 102.
In the cylinder section 113 of wheel hub ring 102, be inserted with the axial region 123 of lateral joint parts 103.End in the anti-cup-shaped portion of axial region 123 is formed with threaded portion 124, is formed with spline part 125 between this threaded portion 124 and cup-shaped portion 107.In addition, be formed with spline part 126 at the inner peripheral surface (aperture surface) of the cylinder section 113 of wheel hub ring 102, when this axial region 123 was inserted the cylinder section 113 of wheel hub rings 102, the spline part 126 of the spline part 125 of axial region 123 sides and wheel hub ring 102 sides engaged.
And, be combined with nut part 127 in the threaded portion 124 from the outstanding axial region 123 of cylinder section 113, wheel hub ring 102 is connected connection with the lateral joint parts.At this moment, outer face 129 butts of the inner end surface of nut part 127 (the inside) 128 and cylinder section 113, simultaneously, the end face 130 of the axial region side of cup-shaped portion 107 and the outer face butt of inner ring 117.That is, by fastening nut parts 127 and via inner ring 117 usefulness nut parts 127 and cup-shaped portion 107 clamping wheel hub rings 102.
Patent documentation 1: TOHKEMY 2004-340311 communique
As mentioned above, in the past, be that the spline part 125 of axial region 123 sides and the spline part 126 of wheel hub ring 102 sides engage.Therefore, need to implement spline processing and cause expensive axial region 123 sides and wheel hub ring 102 side both sides, simultaneously, when being pressed into, the spline part 125 of axial region 123 sides and the concavo-convex of spline part 126 of wheel hub ring 102 sides are matched, at this moment, if be pressed into by the flank of tooth is matched, then might damage (scribing) this shaggy tooth.In addition, just the large footpath by shaggy tooth coincide and is not pressed into if the flank of tooth is coincide, and then easily occurs circumferential loosening.Like this, if there be circumferential becoming flexible, then can make the transitivity of torque deteriorated, also might produce abnormal noise simultaneously.Therefore, carrying out in the chimeric situation of spline like that to prior art, be difficult to make the damage of shaggy tooth and circumferential loosening satisfactory to both parties.
In addition, nut part 127 need to be screwed together in from the threaded portion 124 of the outstanding axial region 123 of cylinder section 113.Therefore, there is the thread connection operation and makes the operating efficiency variation in when assembling, simultaneously, cause also that not only the part number is many and part management is poor.
So, in recent years, as the lateral joint parts 103 of Constant velocity joint 104 and the coupling method of wheel hub ring 102, there is motion to propose, with the protuberance that is arranged at either party in the aperture surface of hole section of the outer diametric plane of axial region 123 of lateral joint parts 103 and wheel hub ring 102 and extends vertically, be pressed into vertically the opposing party, and form by protuberance this opposing party and to connect airtight chimeric recess with protuberance and consist of concavo-convex embedded structure and form one.By adopting this formation, can omit be used to making wheel hub ring 102 and Constant velocity joint 104 shape all-in-one-piece nuts connect operation.
In above-mentioned connecting airtight in the chimeric method, in order to be that parts were wheel hub ring 102 outside axial region 123 was pressed into inner part, wheel hub ring 102 and inner ring 117 expand.This expansion will be between the raceway groove (bearing track face) 118,119 of each parts, inner ring shoulder 117a, both sides raceway groove 133, inner ring path outer diameter part 134 produces hoop-stresss.At this, so-called hoop-stress refers to want the power that produces to the hole enlargement of external diameter direction.Therefore, if this hoop-stress is excessive, then become the reason that bearing produces trouble.Occur in the situation of hoop-stress at bearing track face 118,119, might cause the reduction of rolling bearing fatigue life and crackle occurs.In addition, even in the stage that is pressed into wheel hub ring 102 with the magnitude of interference, inner ring 117 also can produce hoop-stress, thus inner race track face 119, inner ring shoulder 117a occur hoop-stress large especially.The impact of the rust of the end face portion that is exposed on the external produces at inner ring 117 in the situation of hoop-stresss, because might cause stress corrosion cracking.
As mentioned above, in the joint portion of wheel hub ring and Constant velocity joint and the inside of Constant velocity joint so-called " becoming flexible " of occuring when large, will reduce NVH (three large key elements " noise ", " vibration ", " the uneven compliance " of the traveling comfort of the expression car) characteristic of car.Therefore, more require there be not such becoming flexible for improving the NVH characteristic in recent years.
In addition, in this bearing apparatus for wheel, the outside parts with antifriction-bearing box when vehicle is assembled are embedded in steering swivel.At this moment, usually by Bolt Connection and outside parts and steering swivel are integrated.Therefore, the point of attachment at this bolt easily occurs loosening.
Summary of the invention
In view of above-mentioned problem, the first purpose of the present invention is, provide a kind of and realize suppressing circumferential loosening, and wheel hub ring is connected the high bearing apparatus for wheel of connection operating efficiency of lateral joint parts with Constant velocity joint.Another object of the present invention is to, a kind of Bolt Connection operation of omitting is provided, can reduce cost, simultaneously, can reduce again the generation of hoop-stress and then can prevent that bearing from producing the bearing apparatus for wheel of trouble.Other purpose of the present invention be to provide a kind of prevent because of the joint portion of wheel hub ring and Constant velocity joint and and steering swivel between the loosening NVH characteristic that causes so that can carry out the bearing apparatus for wheel of high-precision transmission of torque.
The bearing apparatus for wheel of a first aspect of the present invention, with wheel hub ring, arrange antifriction-bearing box and Constant velocity joint carries out modularization, described many row's antifriction-bearing boxs have more: outside parts, it is being formed with how exclusive siding track face interior week; Inner part, its by have at outer peripheral face with the wheel hub ring of the opposed inner track face of described how exclusive siding track face and outside be embedded in this wheel hub ring and the inner ring that is formed with opposed another inner track face of described how exclusive siding track face in periphery consists of; Many row's balls, its rolling is contained between two orbital planes of this inner part and described outside parts freely, it is characterized in that, has the concavo-convex embedded structure of axial region shape all-in-one-piece with the lateral joint parts of wheel hub ring and Constant velocity joint, with the protuberance that is arranged at either party in the aperture surface of hole section of the outer diametric plane of axial region of lateral joint parts and wheel hub ring and extends vertically along axially being pressed into the opposing party, connect airtight chimeric recess in the opposing party's formation by protuberance and protuberance, the described concavo-convex embedded structure that formation is connected airtight the chimeric contact site integral body of protuberance and recess, and the inner ring in the scope corresponding with outside diameter of concavo-convex embedded structure and the cooperation of path stage portion are made non-interference fit, simultaneously interference fit is made in the cooperation of the inner ring in other scopes and path stage portion.At this, so-called interference fit refers to usually can have the cooperation of the magnitude of interference when making up.In addition, so-called non-interference fit refers to transition fit and free-running fit.In addition, so-called transition fit refers to can be gapped because of the actual size of hole, axle or the cooperation of the magnitude of interference in when assembling, the cooperating of hole or part superposition whole with the tolerance band of axle.So-called free-running fit refers to usually can gappedly cooperate when assembling.
According to the bearing apparatus for wheel of first aspect present invention, because concavo-convex embedded structure connects airtight the integral body of the chimeric contact site of protuberance and recess, thereby in this embedded structure, can not produce loosening gap in footpath direction and circumferential formation.
In addition, because the inner ring in the scope corresponding with outside diameter of concavo-convex embedded structure and the cooperation of path stage portion are made non-interference fit, thereby can be with the Min. that is suppressed at of the hoop-stress of the inner ring in the scope corresponding with outside diameter of concavo-convex embedded structure.Owing to the inner ring in other scopes of the scope corresponding with outside diameter of concavo-convex embedded structure and the cooperation of path stage portion are made interference fit, thereby can prevent the creep of inner ring.At this, so-called creep refer to because of the working accuracy of magnitude of interference deficiency and chimeric surface bad etc. at bearing along the phenomenon that fine motion occurs circumferentially and the relative changing of the relative positions occurs bearing when the fitting surface of bearing produces the gap between fitting surface.
Can form circumferential cut section and consist of non-interference fit by the inner ring aperture surface in the scope corresponding with outside diameter of concavo-convex embedded structure, perhaps can outside the path stage portion, form circumferential cut section and consist of non-interference fit by diametric plane.
As bearing apparatus for wheel, also can be with wheel hub ring, many row's antifriction-bearing boxs and Constant velocity joint carry out the Componentized bearing apparatus for wheel, wherein, has the concavo-convex embedded structure of axial region shape all-in-one-piece with wheel hub ring and Constant velocity joint, with the protuberance that is arranged at either party in the aperture surface of hole section of the outer diametric plane of axial region of lateral joint parts and wheel hub ring and extends vertically along axially being pressed into the opposing party, connect airtight chimeric recess in the opposing party's formation by protuberance and protuberance, the above-mentioned concavo-convex embedded structure that formation is connected airtight the chimeric contact site integral body of protuberance and recess, and above-mentioned antifriction-bearing box has the outside parts that have orbital plane at aperture surface, connects and composes the steering swivel of suspension gear on these outside parts via the integrated connection structure of Nonseparation.
According to such bearing apparatus for wheel, because same with above-mentioned the first bearing apparatus for wheel, concavo-convex embedded structure connects airtight the integral body of the chimeric contact site of protuberance and recess, thus this embedded structure the footpath direction and circumferential on can not form and produce loosening gap.In addition, owing to connect and compose the steering swivel of suspension gear via the integrated connection structure of Nonseparation on the side component outside, thereby between these outside parts and steering swivel, do not produce loosening.Integrated connection structure both can be made of the riveted joint of steering swivel and/or outside parts, also can be made of the riveted joint by the riveted joint parts that is clipped between steering swivel and the outside parts, can also be made of the welding between steering swivel and the outside parts.
Also can be, be arranged at the axial region of the lateral joint parts of Constant velocity joint by the protuberance with above-mentioned concavo-convex embedded structure, and the hardness that makes at least the axial end portion of this protuberance is higher than the hole section inside diameter of wheel hub ring, and above-mentioned axial region is pressed into the hole section of wheel hub ring from the axial end portion side of protuberance, thus, utilize this protuberance to form with protuberance at the hole of wheel hub ring section aperture surface and connect airtight the recess of driving fit, and consist of above-mentioned concavo-convex embedded structure.At this moment, by the recess formation face (the hole section aperture surface of wheel hub ring) that protuberance is squeezed into the other side's side hole section is become and carried out a little state of hole enlargement, to allow protuberance in axial movement, if stop axial movement, then hole section carries out undergauge to revert to original bore.Thus, the chimeric contact site of the recess of protuberance integral body is connected airtight the recess corresponding with it.
In addition, also can be, be arranged at the aperture surface of the hole section of wheel hub ring by the protuberance with above-mentioned concavo-convex embedded structure, while makes the hardness of the axial end portion of this protuberance be higher than the axial region outer diameter part of the lateral joint parts of Constant velocity joint at least, and the protuberance of above-mentioned wheel hub ring side is pressed into the axial region of lateral joint parts from its axial end portion side, thus, utilize this protuberance to connect airtight chimeric recess in the outer diametric plane formation of the axial region of lateral joint parts with protuberance, consist of above-mentioned concavo-convex embedded structure.By protuberance being squeezed into the outer diametric plane of axial region, and being become, the hole section of wheel hub ring carried out a little state of hole enlargement, to allow protuberance in axial movement, if stop axial movement, then hole section carries out undergauge to revert to original bore.Thus, protuberance connects airtight with the chimeric contact site integral body that is embedded in the recess (the outer diametric plane of axle) of the other side's parts of this protuberance.
The bearing apparatus for wheel of second aspect present invention, with wheel hub ring, many row's antifriction-bearing boxs and Constant velocity joint carry out modularization, wherein, the axial region that has wheel hub ring and the lateral joint parts of the Constant velocity joint of the hole section that is intercalated in wheel hub ring forms integrated concavo-convex embedded structure, above-mentioned concavo-convex embedded structure is, the protuberance of outer diametric plane of axial region of lateral joint parts and the chimeric contact site integral body of recess of aperture surface that is embedded in the wheel hub ring of this protuberance are connected airtight, and the outside diameter at wheel hub ring forms the hardened layer that utilizes high-frequency induction quenching to generate, and simultaneously the internal side diameter of wheel hub ring is made not as-quenched.
Bearing apparatus for wheel according to second aspect present invention, because identical with above-mentioned the first bearing device for vehicle, concavo-convex embedded structure is that the integral body of the chimeric contact site of protuberance and recess is connected airtight, thereby this embedded structure in footpath direction and circumferential can formation loosening gap occurs.In addition, because the internal side diameter of wheel hub ring is made not as-quenched, thereby the internal side diameter of wheel hub ring is soft.The raising of the mosaic in the time of therefore, can realizing that protuberance with the outer diametric plane of the axial region of lateral joint parts is embedded in the recess of hole section aperture surface of wheel hub ring.
The hardened layer of the outer diametric plane of wheel hub ring for example can form by high-frequency induction quenching.At this, so-called high-frequency induction quenching refers to, adds the required part of quenching in the coil that high-frequency currents flows through, and produces the process for quenching that joule heat is also used the principle that the conductance object is heated by the electromagnetic induction effect.That is, if carry out this high-frequency induction quenching, then can make surperficial hardening and the hardness of inner material is maintained the original state, thereby make the internal side diameter of wheel hub ring remain on not as-quenched.Relative therewith, if when the cure process at each position of Constant velocity joint, use carburizing and quenching commonly used, then might also internal side diameter be hardened.That is, because so-called carburizing and quenching refers to, make carbon infiltrate/spread from the raw-material surface of low-carbon (LC), quench thereafter, even thereby adopt and prevent that carbon also can contain carbon to a certain degree and hardens to about HV400 at internal side diameter.
In addition, as bearing device for vehicle also can for, with wheel hub ring, many row's antifriction-bearing boxs and Constant velocity joint carry out modularization, wherein, have wheel hub ring, form integrated concavo-convex embedded structure with the axial region of the lateral joint parts of the Constant velocity joint of inserting the hole section be embedded in wheel hub ring, be pushed down into the axial region of lateral joint parts by the state that has carried out adding thermal expansion in the hole section to wheel hub ring, consist of the protuberance of outer diametric plane of axial region of lateral joint parts and the chimeric contact site integral body of recess of aperture surface that is embedded in the wheel hub ring of this protuberance and connect airtight the above-mentioned concavo-convex embedded structure that forms.
According to such bearing apparatus for wheel, because identical with above-mentioned the first bearing apparatus for wheel, concavo-convex embedded structure is, the integral body of the chimeric contact site that makes protuberance and recess is connected airtight, thereby this chimeric concaveconvex structure produces loosening gap in footpath direction and circumferential can formation.In addition, because the state that has carried out adding thermal expansion in the hole section to wheel hub ring is pushed down into the axial region of lateral joint parts, thereby by making drop in temperature make the hole section of wheel hub ring carry out undergauge.At this moment, can carry out at the aperture surface of wheel hub ring the transfer printing of protuberance shape of the outer diametric plane of axial region.That is, remove this heated condition by the aperture surface that protuberance is squeezed into wheel hub ring, just can make hole section carry out undergauge and revert to original bore.Thus, the chimeric contact site integral body of protuberance and recess is connected airtight.
Preferably add the thermal expansion temperature less than the assurance temperature of bearing apparatus for wheel component parts.At this, the so-called temperature that guarantees (for example refers to bring into play the employed component parts of bearing device for vehicle, packing seal, grease, retainer, coder etc.) the temperature of function, less than this assurance temperature the time, can not damage the function of each component parts.
In addition, as bearing apparatus for wheel also can be, with wheel hub ring, many row's antifriction-bearing boxs and Constant velocity joint carry out modularization, wherein, have wheel hub and be intercalated in the concavo-convex embedded structure that the axial region of lateral joint parts of Constant velocity joint of the hole section of wheel hub ring is made of one, formation is used the tapering along the centering that is pressed into the direction undergauge in the hole of above-mentioned wheel hub ring section, via the tapering axial region of lateral joint parts is pressed into the hole section of above-mentioned wheel hub ring, consists of the protuberance of outer diametric plane of axial region of lateral joint parts and the chimeric contact site integral body of recess of aperture surface that is embedded in the wheel hub ring of this protuberance and connect airtight the above-mentioned concavo-convex embedded structure that forms.
According to such bearing apparatus for wheel, because identical with above-mentioned the first bearing apparatus for wheel, concaveconvex structure is for to connect airtight the chimeric contact site integral body of protuberance and recess, thereby this embedded structure produces loosening gap in footpath direction and circumferential can formation.In addition, use the tapering owing to being formed with along the centering that is pressed into the direction undergauge in the hole of wheel hub ring section, thereby when the axial region with the lateral joint parts is pressed into the hole section of wheel hub ring, the guide piece in the time of can making this centering be pressed into beginning with the tapering formation.
Preferred or the convex shoulder (centering is facial with cylinder) of only having the aligning of the path of small quantity to use identical with the aperture of the hole section of wheel hub ring in the front end setting of the axial region of lateral joint parts.When being provided with the convex shoulder, not only can preventing off-centre but also axial region can be pressed into wheel hub ring.
Preferably will take in the pit part that forms the section that extrudes that produces because of the above-mentioned recess that is pressed into formation and be arranged at axial region.At this, the so-called section of extruding refers to the chimeric position of the recess of protuberance is embedded the material part of capacity of the recess of (chimeric), by the material of extruding from formed recess, cut the material that gets off for forming recess, perhaps consisted of by the material that squeezes out and the material that cuts etc.
In addition, the projected direction middle part of protuberance is corresponding with the position that the recess of the hole section of wheel hub ring forms front recess formation face.At this moment, the internal diameter size of the aperture surface of the hole section of wheel hub ring is set as, less than the greatest diametrical dimension of the circle that links the raised part summit, and greater than the greatest diametrical dimension of the recess of the outer diametric plane of the axial region between the protuberance.
Preferably the circumferential thickness of the projected direction middle part of protuberance is made less than in the circumferential size along the position corresponding with above-mentioned middle part between the circumferentially adjacent protuberance.By setting like this, the summation of the circumferential thickness of the projected direction middle part of protuberance is made less than being embedded in along the summation of the circumferential thickness of the position corresponding with above-mentioned middle part of the protuberance of the other side's side between the circumferentially adjacent protuberance.
Along axial jog, and this jog can be formed zig-zag in axial at least a portion setting of raised part side.
The lateral joint parts of above-mentioned Constant velocity joint have: in the oral area of inner contact parts is housed and the outstanding above-mentioned axial region that arranges from the bottom of this oral area, with the riveted joint of the end of wheel hub ring and via the inner ring of the antifriction-bearing box that is embedded in wheel hub ring outward antifriction-bearing box is applied prefilling force, make described oral area and wheel hub ring end formation contactless state.
In the present invention, because concavo-convex embedded structure produces loosening gap in footpath direction and circumferential can formation, thereby whole chimeric position helps transmitting torque, and then can transmit stable torque and not produce abnormal noise.In addition, owing to carried out zero-lash connecting airtight, thereby improved the intensity at transmission of torque position.Therefore, can make bearing apparatus for wheel light weight, compactness.
In addition, owing to the inner ring in the scope corresponding with outside diameter of concavo-convex embedded structure and the cooperation of path stage portion are made non-interference fit, thereby the hoop-stress that the inner ring in the scope corresponding with outside diameter of concavo-convex embedded structure can be produced is suppressed at Min..Thus, can prevent that bearing from producing the troubles such as the reduction of rolling fatigue life, crackle generation and stress corrosion cracking, and then high-quality bearing apparatus for wheel can be provided.
Owing to the inner ring in other scopes of the scope corresponding with outside diameter of concavo-convex embedded structure and the cooperation of path stage portion are made interference fit, thereby can prevent creep.That is, can prevent that the phenomenon at the fitting surface relativity shift from being creep, and can make inner ring guarantee stable cooperation, and then high-quality bearing apparatus for wheel can be provided.In addition, form axial cut-outs section by the inner ring aperture surface in the scope corresponding with outside diameter of concavo-convex embedded structure and consist of non-interference fit, perhaps diametric plane forms circumferential cut section and consists of non-interference fit outside the path stage portion, can between the inner ring of this scope and path stage portion, form the gap, and then can suppress more reliably the generation of hoop-stress.In addition, when the inner ring aperture surface forms circumferential cut section, do not need the wheel hub ring side is carried out be used to the processing that consists of non-interference fit, and have the advantage of using existing apparatus.When diametric plane forms circumferential cut section outside the path stage portion, do not need the inner ring side is carried out be used to the processing that consists of non-interference fit, and have the advantage of using existing apparatus.
Because the integrated connection structure via Nonseparation connects steering swivel, thereby do not produce outside loosening between side component and the steering swivel.And, because with outside parts and being made of one of steering swivel, thereby can be implemented in the simplification (facilitation) of the assembling operation of vehicle maquila.Like this, can reduce joint portion loosening of wheel hub ring and Constant velocity joint, simultaneously, can eliminate loosening between outside parts and the steering swivel, and then can realize having used the raising of NVH characteristic of the vehicle of this bearing device for vehicle.
Do the internal side diameter of wheel hub ring soft.Therefore, can realize the raising of the mosaic (adhesion) when protuberance with the outer diametric plane of the axial region of lateral joint parts is embedded in the recess of hole section aperture surface of wheel hub ring, it is loosening to be suppressed at accurately footpath direction and circumferential generation.In addition, owing to form hardened layer at the outside diameter of wheel hub ring, thereby can realize the intensity of wheel hub ring and the raising of durability.Particularly by utilizing high-frequency induction quenching to form hardened layer, can prevent the sclerosis of internal side diameter, stably guarantee the not as-quenched of internal side diameter.
Be pushed down into the axial region of lateral joint parts by the state that has carried out adding thermal expansion in the hole section to wheel hub ring, can form reliably concavo-convex embedded structure.Owing to will add the assurance temperature that the thermal expansion temperature setting is not enough bearing apparatus for wheel component parts, effectively their function of performance such as the employed packing seal of this bearing apparatus for wheel and grease can be made, and then the quality as bearing apparatus for wheel can be guaranteed.
Guide piece in the time of can making centering be pressed into beginning with the tapering formation, the axial region with respect to the hole section of wheel hub ring is pressed into the lateral joint parts with can not producing skew can carry out stable transmission of torque.Particularly, being provided with the convex shoulder that aligning uses (when centering is facial with cylinder), not only can prevent off-centre but also wheel hub ring can be pressed into wheel hub ring, and then carry out more stable being pressed into.
In addition, the protuberance of above-mentioned concavo-convex embedded structure is set at the axial region of the lateral joint parts of Constant velocity joint, simultaneously, make the hardness of the axial end portion of this protuberance be higher than the hardness of the hole section inside diameter of wheel hub ring, if in the hole section that above-mentioned axial region is pressed into wheel hub ring from the axial end portion side of protuberance, then can improve by heat treatment the hardness of axial region side, can improve the rigidity of axial region.In addition, the protuberance of above-mentioned concaveconvex structure is set at the aperture surface of the hole of wheel hub ring section, make simultaneously the hardness of the axial end portion of this protuberance be higher than the hardness of outer diameter part of axial region of the lateral joint parts of Constant velocity joint, when the protuberance with above-mentioned wheel hub ring side is pressed into the axial region of lateral joint parts from its axial end portion side, the hardness that does not need to carry out the axial region side is processed (heat treatment), so the capacity rating of the lateral joint parts of Constant velocity joint is good.
Take in the pit part that forms the section that extrudes that produces because of the above-mentioned protuberance that is pressed into by setting, can keep (keeping) in this pit part the section of extruding, and it be interior etc. to be unlikely to make the section of extruding to press to the outer vehicle of device.That is, the section of extruding directly can be contained in pit part, not need the processing of removing of the section of extruding, can realize the assembling operation minimizing in man-hour, and can realize raising and the cost of assembling operation efficient.
In addition, by the convex shoulder of using at the hole section aligning of the opposition side setting of the axial protuberance of pit part and wheel hub ring, can not make the section of extruding in the pit part convex shoulder side that flies out, and make taking in of the section of extruding more stable.And, because the convex shoulder is aligning usefulness, thereby can prevent that off-centre can be pressed into wheel hub ring with axial region.Therefore, can connect accurately lateral joint parts and wheel hub ring, make stable transmission of torque become possibility.
In addition, on the recess formation face before being disposed at recess and forming by the arbitrary position with the projected direction of protuberance, can make protuberance when being pressed into, get into recess and form face, can form reliably recess.
The circumferential thickness of the projected direction middle part by making protuberance can increase the circumferential thickness of the projected direction middle part of the protuberance (protuberance between formed recess) that forms the recess side less than the size of the position corresponding with above-mentioned middle part between circumferentially adjacent protuberance.Therefore, the shearing section of the protuberance (because forming the low protuberance of hardness between the recess that recess forms) of the other side's side can be increased, torsional strength can be guaranteed.And, because the transverse tooth thickness of the protuberance of the high side of hardness is little, thereby can makes and being pressed into load and diminishing, thereby can realize the raising of embedability.
By at projection jog being set, when being pressed into, can make jog along axially clamp-oning the little side of hardness (be formed with and make protuberance carry out a side of chimeric recess).Clamp-on by this, can consist of the axial anticreep of the lateral joint parts of the Constant velocity joint relative with wheel hub ring.Therefore, stable coupled condition can be kept, and then high-qualityization of bearing device for vehicle can be realized.And, owing to can consist of anticreep by jog, thereby can omit existing thread connection.Therefore, need to not form from the outstanding threaded portion of the hole section of wheel hub ring at axial region, and can realize lightweight, simultaneously, can omit the thread connection operation, and then can realize the raising of assembling operation efficient.
Because oral area and wheel hub ring end form contactless state, thereby can prevent the generation that contacts the abnormal noise that causes because of oral area and wheel hub ring.In addition, as long as can suppress the generation of abnormal noise, the caulking part of oral area and wheel hub ring is contacted.In addition, because the end of wheel hub ring riveted and antifriction-bearing box is applied prefilling force, thereby needn't apply prefilling force to antifriction-bearing box by the oral area of lateral joint parts.Therefore, can not consider the prefilling force of antifriction-bearing box and be pressed into the axial region of lateral joint parts, and then can realize the raising of the connectivity (assembleability) of wheel hub ring and lateral joint parts.
Description of drawings
Fig. 1 is the longitudinal diagram of the bearing apparatus for wheel of expression first embodiment of the invention;
Fig. 2 A represents the concavo-convex embedded structure of above-mentioned bearing apparatus for wheel, is amplification profile;
Fig. 2 B represents the concavo-convex embedded structure of above-mentioned bearing apparatus for wheel, is the X section enlarged drawing of Fig. 2 A;
Fig. 3 is the section-drawing of the decomposing state of the above-mentioned bearing apparatus for wheel of expression;
Fig. 4 is the main portion amplification profile of the variation of the concavo-convex embedded structure of expression;
Fig. 5 is the longitudinal diagram of the bearing apparatus for wheel of expression second embodiment of the invention;
Fig. 6 is the main portion amplification profile of above-mentioned Fig. 5;
Fig. 7 is the main portion enlarged drawing of the wheel hub ring of bearing apparatus for wheel as shown in Figure 1 above;
Fig. 8 is the schematic drawing of variation of axial region of the outer ring of expression Constant velocity joint;
Fig. 9 is the schematic drawing that the axial region with as shown in Figure 8 above Constant velocity joint is pressed into the state behind the wheel hub ring;
Figure 10 is the main portion amplification profile of above-mentioned Fig. 9;
Figure 11 is the main portion enlarged drawing of the comparative example of expression wheel hub ring;
Figure 12 is the main portion amplification profile of the bearing apparatus for wheel of expression third embodiment of the invention;
Figure 13 is the main portion amplification profile of the bearing apparatus for wheel of expression variation of the present invention;
Figure 14 is the main portion amplification profile of the bearing apparatus for wheel of another variation of expression the present invention;
Figure 15 is the main portion amplification profile of the bearing apparatus for wheel of expression four embodiment of the invention;
Figure 16 A represents integrated connection structure, is the front amplification profile of riveted joint of fixed parts;
Figure 16 B represents integrated connection structure, is the amplification profile after the riveted joint of fixed parts;
Figure 17 is the section-drawing of the decomposing state of expression as above-mentioned bearing apparatus for wheel shown in Figure 15;
Figure 18 A represents the variation of integrated connection structure, is the section-drawing when having used welding;
Figure 18 B represents the variation of integrated connection structure, is the section-drawing when not using fixed parts;
Figure 19 is the section-drawing of variation of the hole section of expression wheel hub ring;
Figure 20 is the amplification profile of another variation of the hole section of expression wheel hub ring;
Figure 21 A is the main portion amplification profile of the bearing apparatus for wheel of expression fifth embodiment of the invention;
Figure 21 B is the Y section enlarged drawing of Figure 21 A;
Figure 22 is the section-drawing of existing bearing apparatus for wheel.
Nomenclature
1: wheel hub ring
2: antifriction-bearing box
3: Constant velocity joint
11: oral area
12: axial region
22: hole section
22a: axial region embedded hole
24: inner ring
31: caulking part
35: protuberance
36: recess
38: chimeric contact site
45: extrude section
50: pit part
55: jog (sawtooth section)
H: hardened layer
H1: hardened layer
M: concavo-convex embedded structure
The specific embodiment
Below, with reference to Fig. 1～Figure 21 embodiments of the present invention are described.Fig. 1 represents the bearing apparatus for wheel of the first embodiment, this bearing apparatus for wheel for wheel hub ring 1, arrange antifriction-bearing box 2 and Constant velocity joint 3 more and form one and form.
Constant velocity joint 3 take as the outer ring 5 of lateral joint parts, be disposed at the inboard of outer ring 5 the inner ring 6 as the inner contact parts, be clipped between outer ring 5 and the inner ring 6 and a plurality of balls 7 of transmitting torque, be clipped between outer ring 5 and the inner ring 6 and the retainer 8 that keeps ball 7 consists of as main parts.It is chimeric that inner ring 6 carries out spline by the end 10a that is pressed into axle 10 at its shaft hole diameter 6a, but with axle 10 transmitting torque ground combinations.In addition, the come off back-up ring 9 of usefulness of anti-axle arranged in that the end of axle 10 10a is chimeric.
Outer ring 5 is made of oral area 11 and axle portion (axial region) 12, and oral area 11 is at one end forming the cup-shaped of opening, and sphere 13 is along the circumferential a plurality of raceway grooves 14 that extend vertically that uniformly-spaced are formed with within it.This raceway groove 14 extends to the open end of oral area 11.Inner ring 6 at its spherical outside surface 15 along the circumferential a plurality of raceway grooves 16 that extend that uniformly-spaced are formed with vertically.
It is right that the raceway groove 14 of outer ring 5 and the raceway groove of inner ring 6 16 consist of, and rollably organizes the ball 7 that enters to have as the transmission of torque key element in by each each ball road that raceway groove 14,16 is consisted of.Ball 7 is clipped between the raceway groove 16 of the raceway groove 14 of outer ring 5 and inner ring 6 with transmitting torque.Retainer 8 is clipped between outer ring 5 and the inner ring 6 slidably, and its Internal Spherical Surface 13 in spherical outside surface 8a and outer ring 5 is joined, and joins at the spherical outside surface 15 of Internal Spherical Surface 8b and inner ring 6.In addition, the Constant velocity joint of this situation is illustrated in each raceway groove 14,16 bottom land has the unrooted cut type of the smooth department of linearity, but also can be other Constant velocity joints such as ball cage (Star ェ パ one) type.
Wheel hub ring 1 has a section 20 and is arranged at the flange 21 of end of the joint opposition side of a section 20.The hole section 22 of cylinder section 20 possesses: axial region embedded hole 22a, the taper hole 22b of joint opposition side, the large footpath hole 22c of joint side of axial pars intermedia.That is, at axial region embedded hole 22a, via axial region 12 and wheel hub ring 1 combination of concavo-convex embedded structure M described later with the outer ring 5 of Constant velocity joint 3.In addition, between axial region embedded hole 22a and large footpath hole 22c, be provided with tapering (taper hole) 22d.The be pressed into direction of this tapering 22d along in conjunction with the axial region 12 of wheel hub ring 1 and outer ring 5 time carried out undergauge.The coning angle θ (with reference to Fig. 7) of tapering 22d for example is made as 15 °～75 °.
Antifriction-bearing box 2 possesses: be embedded in the cylinder section 20 that is arranged on wheel hub ring 1 joint side path stage portion 23 inner ring 24 and be disposed at the outside parts 25 of outer circumferential side of the cylinder section 20 of wheel hub ring 1.The two exclusive siding track faces (outer ring) 26,27 that are provided with in interior week of side component 25 outside, the first outer side track face 26 is opposite with the first inner track face (inner ring) 28 of cylinder section 20 peripheries that are arranged at wheel hub ring 1, the second outer side track face 27 is opposite with the second inner track face (inner ring) 29 of the outer peripheral face that is arranged at inner ring 24, clamps the ball as rolling body 30 between them.In addition, two peristomes of side component 25 are equipped with sealing element S1, S2 outside.
In this situation, the end of the joint side of wheel hub ring 1 is riveted, apply prefilling force by 31 pairs of antifriction-bearing boxs 2 of its caulking part.Thus, inner ring 24 can be connected with wheel hub ring 1.In addition, be provided with bolt mounting holes 32 at the flange 21 of wheel hub ring 1, will be installed on this bolt mounting holes 32 be used to the boss bolt 33 that makes wheel and brake disc be fixed in this flange 21.
Shown in Fig. 2 A, concavo-convex embedded structure M is for example by the end that is arranged at axial region 12 and the protuberance 35 that extends vertically and the aperture surface of hole section 22 that is formed at wheel hub ring 1 (in this situation, aperture surface 37 for axial region embedded hole 22a) recess 36 consists of, and protuberance 35 connects airtight with chimeric contact site 38 integral body of the recess 36 of the wheel hub ring 1 that is embedded in this protuberance 35.That is, the outer peripheral face of the oral area opposition side of axial region 12 along circumferentially and the as prescribed spacing dispose a plurality of protuberances 35, and along circumferentially being formed with a plurality of recesses 36 of aperture surface 37 of axial region embedded hole 22a that protuberance 35 are embedded in the hole section 22 of wheel hub ring 1.That is, on circumferential all-round, protuberance 35 and the recess 36 that is embedded in it are closely cooperated.
In this situation, the section of each protuberance 35 is the triangle (chevron shape) with summit of protruding R shape, and the chimeric position of the recess of so-called each protuberance 35 is the scope 75 shown in Fig. 2 B, is the scope from the midriff of the chevron of section to the mountain top.In addition, between circumferentially adjacent protuberance 35, more be formed with gap 40 by internal side diameter at the aperture surface 37 of wheel hub ring 1.
The axial region 12 of the outer ring 5 that can wheel hub ring 1 be connected with Constant velocity joint via concavo-convex embedded structure M like this, connects.At this moment, because rivet the end to the joint side of wheel hub ring 1, and apply prefilling force by 31 pairs of antifriction-bearing boxs 2 of this caulking part, thereby do not need to apply prefilling force by 11 pairs of antifriction-bearing boxs of oral area of outer ring 5, and become and make oral area 11 with respect to the discontiguous contactless state in end (in this situation, being caulking part 31) of wheel hub ring 1.
In the present invention, for concavo-convex embedded structure M, the integral body of the chimeric contact site 38 of protuberance 35 and recess 36 is connected airtight, and therefore, this embedded structure M produces loosening gap in footpath direction and circumferential formation.Therefore, chimeric position integral body helps transmission of torque, and can carry out stable transmission of torque, and can not produce abnormal noise.
Because oral area 11 be and wheel hub ring 1 contactless state, namely between the outside face of the diapire outside 11a of oral area 11 and caulking part 31, be provided with clearance t 1 (with reference to Fig. 1), so can prevent the generation of the abnormal noise that causes because of oral area 11 and contacting of wheel hub ring 1.In the present invention, as long as can suppress the generation of abnormal noise, the caulking part 31 of oral area 11 and wheel hub ring 1 is contacted.In addition, because to riveting and antifriction-bearing box 2 is applied prefilling force in the end of wheel hub ring 1, thereby do not need to apply prefilling force by 11 pairs of antifriction-bearing boxs 2 of oral area of lateral joint parts.Therefore, can not consider the prefilling force of antifriction-bearing box 2 and be pressed into the axial region 12 of lateral joint parts, thereby can realize the raising of the connectivity (assembleability) of wheel hub ring 1 and lateral joint parts.
Below, the chimeric method of concavo-convex embedded structure M is described.In this situation, as shown in Figure 3, the outer diameter part of axial region 12 is implemented heat curing process, form the spline 41 that is consisted of by vertically protuberance 41a and recess 41b at this hardened layer H.Therefore, can carry out cure process to the protuberance 41a of spline 41 and make this protuberance 41a become the protuberance 35 of concavo-convex embedded structure M.In addition, the scope of the hardened layer H in this embodiment as with shown in the cross hatch section like that, be the part from the diapire of the external end edge of spline 41 5 the oral area 11 to the outer ring.Can adopt the various heat treatments such as high-frequency induction quenching and carburizing and quenching as this heat curing processing.At this, so-called high-frequency induction quenching refers to use the process for quenching of following principle, that is, the coil that high-frequency currents is flow through adds needed part when quenching, and produces joule heat by the electromagnetic induction effect, and the heat conductivity object is heated.In addition, so-called carburizing and quenching is to instigate carbon to infiltrate/spread from the surface of low carbon materials, the method for then quenching.The modulus of the spline 41 of axial region 12 is made little tooth below 0.5.At this, so-called modulus refers to the parameter by number of teeth segmented section circular diameter.
In addition, also the outside diameter at wheel hub ring 1 forms the hardened layer H1 that forms by high-frequency induction quenching, simultaneously, makes the internal side diameter of wheel hub ring 1 keep not as-quenched.The scope of hardened layer H1 in this embodiment as with shown in the cross hatch section like that, near the caulking part by the 24 chimeric stage portion 23 from the root of flange 21 to inner ring.When carrying out high-frequency induction quenching, can make surface sclerosis and make the inner raw-material hardness that keeps, the internal side diameter of wheel hub ring 1 is maintained not as-quenched.Therefore, aperture surface 37 sides of the hole section 22 of wheel hub ring 1 become and do not carry out unhardened (the not as-quenched) that heat curing is processed.The difference of hardness of the hardened layer H of the axial region 12 of outer ring 5 and the unhardened section of wheel hub ring 1 remains on more than 30% by HRC.
At this moment, it is corresponding that the projected direction middle part of protuberance 35 and the recess recess before forming forms the position of face (in this situation, being the aperture surface 37 of the hole section 22 of wheel hub ring 1).Namely, the internal diameter size D of the aperture surface 37 of the axle embedded hole 22a of hole section 22 is set as, maximum outside diameter less than protuberance 35, namely be greatest diametrical dimension (circumcircle diameter) D1 of circle on the summit of raised part 35 less than the protuberance 41a that links spline 41, and greater than the outside dimension of the outer diametric plane of the axial region between the protuberance, namely link the greatest diametrical dimension D2 of circle of bottom of the recess 41b of spline 41.That is, be made as D2＜D＜D1.
Spline 41 can be that the various job operations such as rolling processing, cutting, punch process, stretch process form by in the past public method.In addition, process as heat curing, can adopt the various heat treatments such as high-frequency induction quenching, carburizing and quenching.
In addition, as shown in Figure 3, under the state that matches in the axle center of the outer ring 5 of the axle center of wheel hub ring 1 and Constant velocity joint 3, wheel hub ring 1 is inserted the axial region 12 of (being pressed into) outer ring 5.At this moment, because the minimum outer diameter dimension D 2 of the recess of the diameter dimension D of the aperture surface 37 of hole section 22, the maximum outside diameter dimension D 1 of protuberance 35 and spline 41 is relation as described above, and the hardness of the aperture surface 37 of the hardness ratio hole section 22 of protuberance 35 is high more than 30%, thereby as long as axial region 12 is pressed into the hole section 22 of wheel hub ring 1, just can make this protuberance 35 clamp-on aperture surface 37, make protuberance 35 form vertically the recess 36 that this protuberance 35 is chimeric.
Thus, shown in Fig. 2 A, 2B, the protuberance 35 of the end of axial region 12 and connect airtight with the integral body of the chimeric contact site 38 of the chimeric recess 36 of this protuberance 35.That is, can form the transfer printing of carrying out the shape of protuberance 35 on the face (in this situation, being the aperture surface 37 of hole section 22) at the recess of the other side's side.At this moment, clamp-on the aperture surface 37 of hole section 22 by protuberance 35, hole section 22 is become carried out a little state of hole enlargement, to allow protuberance 35 in axial movement, when axial movement stopped, hole section 22 carried out undergauge to revert to original bore.In other words, when protuberance 35 was pressed into, wheel hub ring 1 put on the prefilling force of this elastic deformation composition the flank of tooth (surface at the chimeric position of recess) of protuberance 35 in footpath direction generation elastic deformation.Therefore, can form reliably the concavo-convex embedded structure M that the chimeric position of the recess that makes protuberance 35 integral body is connected airtight its corresponding recess 36.And, needn't form spline part etc. at the parts (being wheel hub ring 1 in this situation) that form recess 36, capacity rating is good, and needn't make spline phase place each other consistent, can realize the raising of assembleability, and the damage of the flank of tooth can avoid being pressed into the time, stable chimerism can be kept.
As described in above-mentioned embodiment, to use moduluses be little tooth below 0.5 owing to be formed at the spline 41 of axial region 12, thereby can realize the raising of the formability of this spline 41, simultaneously, can realize the reduction of loading of pressing in.In addition, consist of protuberance 35 owing to having common formed spline at this axle, thereby can form simply this protuberance 35 with low cost.
In addition, by axial region 12 is pressed into wheel hub ring 1, when forming recess 36, these recess 36 side generation work hardening.At this, so-called work hardening refers to that when object generation plastic deformation (plastic working) resistance relative with distortion along with the increase of the degree of being out of shape also increases, and the material that hardness ratio is out of shape is high.Therefore, by elastic deformation occurs when being pressed into, aperture surface 37 sclerosis of the wheel hub ring 1 of recess 36 sides can realize the raising of transmission of torque.
The internal side diameter of wheel hub ring 1 is soft.Therefore, the raising of the mosaic (adhesion) in the time of can realizing making the protuberance 35 of outer diametric plane of the axial region 12 of outer ring 5 to be embedded in the recess 36 of hole section aperture surface of wheel hub ring 1, and can high precision suppress the loosening of footpath direction and circumferential upper generation.Moreover, owing to be formed with hardened layer H1 at the outside diameter of wheel hub ring 1, thereby can realize the intensity of wheel hub ring 1 and the raising of durability.Particularly, form hardened layer H1 by utilizing high-frequency induction quenching, can prevent the sclerosis of internal side diameter, stable with the not as-quenched of guaranteeing internal side diameter.
In addition, in above-mentioned spline shown in Figure 3 41, the spacing of setting protuberance 41a is identical with the spacing of recess 41b.Therefore, in the above-described embodiment, shown in Fig. 2 B, the circumferential size L0 of the circumferential thickness L of the projected direction middle part of protuberance 35 and the position corresponding with above-mentioned middle part between circumferentially adjacent protuberance 35 is roughly the same.
Relative therewith, as shown in Figure 4, also can make the circumferential thickness L2 of projected direction middle part of protuberance 35 less than the circumferential size L1 of the position corresponding with above-mentioned middle part between circumferentially adjacent protuberance 35.That is, in the spline 41 that is formed at axial region 12, make circumferential thickness (transverse tooth thickness) L2 of projected direction middle part of protuberance 35 less than circumferential thickness (transverse tooth thickness) L1 of the projected direction middle part of the protuberance 43 that is embedded in wheel hub ring 1 side between the protuberance 35.
Therefore, with the summation ∑ (B1+B2+B3+ of the transverse tooth thickness of the all-round protuberance 35 of axial region 12 sides ...) be set as the summation ∑ (A1+A2+A3+ less than the transverse tooth thickness of the protuberance 43 (double wedge) of wheel hub ring 1 side ...).Thus, can increase the shearing section of the protuberance 43 of wheel hub ring 1 side, and then can guarantee torsional strength.And, because the transverse tooth thickness of protuberance 35 is little, thereby make that to be pressed into loading little and then can realize the raising of embedability.In the situation of summation less than the summation of the circumferential thickness of the protuberance 43 of the other side's side of the circumferential thickness of protuberance 35, needn't make the circumferential thickness L2 of all protuberances 35 less than the circumferential size L1 between the circumferentially adjacent protuberance 35.That is, in a plurality of protuberances 35, no matter be the circumferential thickness of any protuberance 35 and circumferential circumferential measure-alike between the adjacent protuberance, or large than this circumferential size, need only that to press summation meter little.In addition, the protuberance 35 of Fig. 4 is made section and be trapezoidal.
In addition, when the axial region 12 with outer ring 5 is pressed into the hole section 22 of wheel hub ring 1, the guide piece in the time of can making this centering be pressed into beginning with tapering 22d formation.Thus, be not pressed into the axial region 12 of outer ring 5 with can not producing with respect to the hole section 22 of wheel hub ring 1 skew, and then make stable transmission of torque become possibility.
In contrast to this, as shown in figure 11, in the hole of wheel hub ring 1 one 22, forming in the situation of stage portion 22e in the mode that tapering 22d is formed between embedded hole 22a and the large footpath hole 22c, can not carry out the centering when being pressed into the hole section 22 of wheel hub ring 1 of axial region 12 with outer ring 5, and might make the outer ring 5 of wheel hub ring 1 and Constant velocity joint 3 occur eccentric.Therefore, as mentioned above, preferably be made as 15 °～75 ° as the tilt angle theta (with reference to Fig. 7) of tapering 22d.That is, if less than 15 °, then can not bring into play the function as guide piece, if but the axial length that increases tapering 22d then to be pressed into operating efficiency poor, simultaneously, also might make the axial length of wheel hub ring 1 become large.In addition, if surpass 75 °, then can not become and form as shown in Figure 11 stage portion 22e, and off-centre might occur.
In addition, if the axial region 12 of outer ring 5 is pressed into wheel hub ring 1, then material is extruded from the recess 36 that is formed by protuberance 35 and is formed the section that extrudes 45 as shown in Figure 5 of the second embodiment.Extrude section 45 and be the material part of the volume of the recess 36 of the chimeric position embedding of the recess that makes protuberance 35 (chimeric), namely by the part that extrudes from formed recess 36, the part of cutting for forming recess 36, perhaps consisted of by the part that extrudes and the part of cutting etc.
Therefore, in above-mentioned bearing apparatus for wheel shown in Figure 1, Constant velocity joint is installed on after the wheel hub ring 1, must takes this to extrude the operation of removing of section 45.But, in this embodiment, as mentioned above, be provided with the pit part 50 of taking in the section of extruding 45 at axial region 12.
By the axle head edge at the spline 41 of axial region 12 circumferential slot 51 is set and forms pit part 50.As shown in Figure 6, the sidewall 51a of spline 41 sides of circumferential slot 51 is orthogonal to axial plane, the conical surface of the side 51b of spline opposition side for carrying out hole enlargement to the spline opposition side from bottom land 51c.
In addition, more be provided with the discoid convex shoulder 52 that aligning is used by the spline opposition side than this side 51b.The outside dimension D4 of convex shoulder 52 is set as identical or more smaller than the aperture of embedded hole 22a with the aperture of the embedded hole 22a of hole section 22.In this situation, between the aperture surface of the embedded hole 22a of the outer diametric plane 52a of convex shoulder 52 and hole section 22, be provided with minim gap t.
If axial region 12 is pressed into the hole section 22 of wheel hub ring 1, then the formed section 45 that extrudes will be as shown in FIG. 6, and the limit curled selvage is incorporated in the pit part 50.That is, make from the aperture surface of hole section 22 or the part of the material that scrapes or extrude enters in the pit part 50.
Like this, take in the pit part 50 that forms the section that extrudes 45 that produces because of the above-mentioned recess that is pressed into by setting, can keep (keeping) in this pit part 50 section of extruding 45, and can not extrude the situation of interior grade of vehicle section's 45 accesss to plant outside and so on.That is, the section of extruding 45 can be accommodated in pit part 50 always, and not need the processing of removing of the section of extruding 45, and then can realize the assembling operation minimizing in man-hour, and can realize the raising of assembling operation efficient and the reduction of cost.
In addition, by the convex shoulder 52 of using at hole section 22 alignings of the axial protuberance opposition side setting of pit part 50 and wheel hub ring 1, and make the sections that extrude 45 in the pit part 50 can not fly to convex shoulder 52 sides, thereby make taking in of the section of extruding 45 more stable.And, because convex shoulder 52 is aligning usefulness, thereby can when preventing off-centre, axial region 12 be pressed into wheel hub ring 1.Therefore, can high precision connect lateral joint parts 5 and wheel hub ring 1, and then make stable transmission of torque become possibility.
Because the convex shoulder 52 aligning usefulness when being pressed into, thereby preferably its outside dimension is set as the smaller degree in aperture than the embedded hole 22a of the hole section 22 of wheel hub ring 1.That is, if the outside dimension of convex shoulder 52 is identical with the aperture of embedded hole 22a and when larger than the aperture of embedded hole 22a, then convex shoulder 52 self is pressed into embedded hole 22a.At this moment, if occur eccentricly, then as-is condition is pressed into the protuberance 35 of concavo-convex embedded structure M, becomes with the inconsistent state in axle center of the axle center of axial region 12 and wheel hub ring 1 axial region 12 and wheel hub ring 1 are linked together.In addition, when 52 outside dimension is more too small than the aperture of embedded hole 22a in the convex shoulder, can not use and the performance function as aligning.Therefore, the minim gap t as between the aperture surface of the embedded hole 22a of the outer diametric plane 52a of convex shoulder 52 and hole section 22 is preferably set to about 0.01mm～0.2mm.
As concavo-convex embedded structure M, also can be that the protuberance 41a of spline 41 forms jagged jog 55 at the protuberance 35 of axial region 12.So-called jog 55 refers to along the little jog of the length direction formation at the top of protuberance 41a.In this situation, make the cross section of protuberance (double wedge) 55a be the right angle trigonometry shape take the groove side as the dip plane.The jog 55 of this legend is arranged on pit part 55 sides.
As shown in Figure 8, when the axial region 12 that will possess jog 55 is pressed into the hole section 22 of wheel hub ring 1, on one side by convex shoulder 52 carry out aligning on one side as shown in FIG. 9 the protuberance 35 by axial region 12 sides form recess 36 and then form the section 45 that extrudes in wheel hub ring 1 side.And, while make this extrude that section 45 is curling to be accommodated in it in pit part 50.
In addition, carry out this when being pressed into, jog 55 is being clamp-oned be formed at the bottom of the recess 36 of wheel hub ring 1 side.That is, when being pressed into, make the hole section 22 of the wheel hub ring 1 that has carried out hole enlargement carry out hole enlargement, and carry out undergauge when being pressed into and make it revert to original state finishing.Therefore, make squeese pressure (undergauge power) act on jog 55 from the aperture surface side of the hole section 22 of wheel hub ring 1 in the mode shown in the arrow of Figure 10, and then make the protuberance 55a of jog 55 clamp-on the aperture surface of the hole section 22 of wheel hub ring 1.
Like this, by jog (sawtooth section) 55 is set in protuberance 35 sides, when being pressed into, can make the protuberance 55a of sawtooth section 55 along axially clamp-oning.Clamp-on by this, can consist of the axial anti-loose structure to the lateral joint parts 5 of the Constant velocity joint of wheel hub ring 1.Thus, stable coupled condition can be kept, and high-qualityization of bearing apparatus for wheel can be realized.And, owing to consist of anti-loose structure by sawtooth section 55, thereby can omit the such thread connection of prior art.Therefore, needn't can realize lightweight from the hole section 22 outstanding threaded portions of wheel hub ring 1 in axial region 12 formation, simultaneously, can omit the thread connection operation, and then can realize the raising of assembling operation efficient.
In such bearing apparatus for wheel, shown in Figure 12 such as the 3rd embodiment, preferably non-interference fit is made in the cooperation of the scope 78 of the inner ring 24 in the scope corresponding with outside diameter of concavo-convex embedded structure M and path stage portion 23, simultaneously, the inner ring 24 in other scopes 79 and the cooperation of path stage portion 23 are made interference fit.At this, so-called interference fit refers to usually can have the cooperation of the magnitude of interference when assembling.In addition, so-called non-interference fit refers to transition fit and free-running fit.In addition, so-called transition fit refers to can be gapped because of the actual size (external diameter of the aperture of wheel hub ring 1 and axostylus axostyle 12) of hole, axle or the cooperation of the magnitude of interference in when assembling, be the tolerance band (tolerance band of the external diameter of the aperture of wheel hub ring 1 and axostylus axostyle 12) of finger-hole and axle all or the cooperation of part superposition.So-called free-running fit refers to usually can gappedly cooperate when assembling.
Because the inner ring 24 in the scope corresponding with outside diameter of concavo-convex embedded structure M and the cooperation of path stage portion 23 are made non-interference fit, thereby can be with the Min. that is suppressed at of the hoop-stress of the inner ring in the scope corresponding with outside diameter of concavo-convex embedded structure M.Thus, can prevent that bearing from producing the reduction of rolling fatigue life, crack, and the trouble such as stress corrosion cracking, and then high-quality bearing apparatus for wheel can be provided.In addition, because the inner ring 24 in other scopes of the scope corresponding with outside diameter of concavo-convex embedded structure M and the cooperation of path stage portion 23 are made interference fit, thereby the phenomenon that can prevent the relativity shift between fitting surface is creep, simultaneously, can guarantee to make the stable cooperation of inner ring 24, and then high-quality bearing apparatus for wheel can more stably be provided.
As shown in figure 13, also can form circumferential cut section 80 and consist of non-interference fit (being free-running fit in this situation) by the inner ring aperture surface in the scope 78 corresponding with outside diameter of concavo-convex embedded structure M.
Because other of as shown in figure 13 bearing apparatus for wheel consists of identical with as shown in Figures 1 and 2 bearing arrangement, thus for identical formation mark with as shown in Figures 1 and 2 bearing arrangement with identical symbol and its explanation is omitted.
Therefore, this bearing arrangement shown in Figure 13 has also been realized the action effect same with the bearing arrangement of Figure 1 and Figure 2.Particularly, consist of non-interference fit by form circumferential cut section 80 at the inner ring aperture surface, form the gap between inner ring 24 that can be in this scope and the path stage portion 23, can suppress more reliably the generation of hoop-stress.In addition, do not need the wheel hub ring side is consisted of the processing of non-interference fit, thereby have the advantage that to use existing manufacturing installation.
In addition, as shown in figure 14, the outer diametric plane of the path stage portion 23 of wheel hub ring 1 that also can be in the scope 78 corresponding with outside diameter of concavo-convex embedded structure M forms circumferential cut section 81 and consists of non-interference fit (being free-running fit in this situation).
Because other formations of as shown in figure 14 bearing apparatus for wheel is identical with the bearing arrangement of above-mentioned Figure 1 and Figure 2, thus for identical formation mark with as shown in Figures 1 and 2 bearing arrangement with identical symbol and its explanation is omitted.
Therefore, this bearing arrangement shown in Figure 14 has also been realized the action effect same with the bearing arrangement of Figure 1 and Figure 2.Particularly consist of non-interference fit by forming circumferential cut section 81 at the outer diametric planes of path stage portion 23, form the gap between inner ring 24 that can be in this scope and the path stage portion 23, can suppress more reliably the generation of hoop-stress.In addition, do not need inner ring 24 sides are consisted of the processing of non-interference fit, thereby have the advantage that to use existing manufacturing installation.
In addition, this bearing apparatus for wheel as the 4th embodiment be shown in Figure 15 and Figure 16 A, the 16B like that, the integrated connection structure 85 by non-divergence type is connected steering swivel N with the outside parts 25 of antifriction-bearing box 2.The quilt riveted joint parts that integrated connection structure 85 in this situation possesses the outer diametric plane that is fixed in outside parts 25 are fixed parts 86, at this fixed parts 86 upper outside steering swivel N that are embedded with.Fixed parts 86 possesses: be embedded in outward the short cylinder shape of outside parts 25 main part 87, be arranged at outer convex shoulder 88a, the 88b of the axial end portion of this main part 87.
In this situation, the axial midway location of the outer diametric plane of side component 25 is provided with circumferential recess 89 outside, is provided with internal diameter protrusion 93 at the axial midway location of the aperture surface of the main part 87 of fixed parts 86.And, be embedded at this internal diameter protrusion 93 and make outside parts 25 and fixed parts 86 form one under the state of circumferential recess 89, outside steering swivel N, be embedded under the state of main part 87, make outer convex shoulder 88a, 88b be limited to end face 90a, the 90b (with reference to Figure 16 A and Figure 16 B) of the shaft sleeve part 90 of the embedded hole 92 with steering swivel N.
That is, before steering swivel was installed, axial end portion 86a, the 86b of fixed parts 86 was outstanding to the axial outside from the axial end edge of outside parts 25.And, when steering swivel is installed, so that axial end portion 86a, the 86b of fixed parts 86 carry out plastic deformation processing (riveted joint processing) to the outstanding mode of external diameter direction.At this moment, riveted joint processing also can be that circumference is all-round or local.Thus, by fixed parts 86 steering swivel N is fixed in outside parts 25.
In this situation, as shown in figure 17, under the state that matches in the axle center of the outer ring 5 of the axle center of wheel hub ring 1 and Constant velocity joint 3 axial region 12 is pressed into the hole section 22 of wheel hub ring 1.
Owing to connect steering swivel N via the integrated connection structure 85 of non-divergence type, thereby between these outside parts 25 and steering swivel N, can not become flexible.And, because outside parts 25 and steering swivel N are made of one, thereby can be implemented in the simplification (facilitation) of the assembling operation of vehicle maquila.
Like this, can reduce junction surface loosening of wheel hub ring 1 and Constant velocity joint 3, simultaneously, can eliminate loosening between outside parts 25 and the steering swivel N, can realize having used the raising of NVH characteristic of the vehicle of this bearing apparatus for wheel.
Secondly, Figure 18 A, 18B represent the variation of integrated connection structure 85, and Figure 18 A consists of by welding, and Figure 18 B is that the riveted joint by the outside parts 25 that omitted fixed parts 86 consists of.That is, axial end portion 86a, the 86b of the fixed parts 86 of Figure 18 A do not carried out plastic deformation processing but by end face 90a, the 90b joint of welding with this axial end portion 86a, 86b and steering swivel N.At this moment, weld part also can be that circumference is all-round or local.On Figure 18 A, 91 expression weld parts.
In Figure 18 B, make with the aperture of the embedded hole 92 of the shaft sleeve part 90 of steering swivel N the outside dimension of outside parts 25 roughly the same.And, outside parts 25 are embedded shaft sleeve part 90, externally the axial end portion of side component 25 is riveted, and makes its caulking part 94,94 be sticked in end face 90a, the 90b of the shaft sleeve part 90 of steering swivel N.
Like this, integrated connection structure 85 both can be that to rivet also can be welding, and it is good that it connects workability, and outside parts 25 and steering swivel N can be linked into an integrated entity securely.
But, as shown in figure 19, also can be along the little recess 95 that the configuration of as prescribed spacing circumferentially is set on the aperture surface 37 of the hole of wheel hub ring 1 one 22.Must be less than the volume of recess 36 as little recess 95.Like this, by little recess 95 is set, can realize the raising of the embedability of protuberance 35.That is, by little recess 95 is set, the formed capacity of extruding section 45 in the time of can reducing protuberance 35 and be pressed into, and then can realize the reduction of resistance of pressing in.In addition, because the section of extruding 45 is reduced, thereby the volume of pit part 50 can be reduced, the raising of the intensity of the processability of pit part 50 and axial region 12 can be realized.In addition, the shape of little recess 95 is the triangle of acute angle for its top in Figure 19, but can in addition, can also be the various shapes such as semiellipse shape, rectangle as shown in figure 20 for the top being made the triangle of R shape also, and quantity also can Set arbitrarily.
In the respective embodiments described above, in the time of also can inserting (being pressed into) to wheel hub ring 1 at the axial region 12 with outer ring 5, the cell cube that antifriction-bearing box 2 is installed on wheel hub ring 1 and even the wheel hub ring 1 is heated, and make the hole section 22 (being axial region embedded hole 22a at least) of wheel hub ring 1 carry out hole enlargement.That is, the aperture of the hole section 22 before the heating is above-mentioned D, makes the D ' larger than this D (with reference to Fig. 3).Make D ' less this moment than D1.
Like this, if axial region 12 is pressed into the hole section 22 of wheel hub ring 1, then because the hardness of the aperture surface 37 of the hardness ratio hole section 22 of protuberance 35 is large more than 30%, thereby can make this protuberance 35 clamp-on aperture surface 37, make protuberance 35 form vertically the chimeric recess 36 of this protuberance 35.
In this situation, the state that makes hole section 22 become hole enlargement by heating allows protuberance 35 in axial movement.In addition, make hole section carry out undergauge by the releasing heated condition and revert to original bore.In other words, when protuberance 35 is pressed into, makes wheel hub ring 1 add thermal deformation in the footpath direction, and this prefilling force that adds heat distortion amount is put on the flank of tooth (surface at the chimeric position of recess) of protuberance 35.Therefore, can realize the raising of adhesion of the chimeric contact site integral body of protuberance 35 and recess 36, lateral joint parts and wheel hub ring 1 are connected securely.And, needn't form the parts (be wheel hub ring 1 in this situation) of recess 36) the formation spline part etc., thereby high productivity, and do not need spline phase place each other consistent, can realize the raising of assembleability, and the damage of the flank of tooth can avoid being pressed into the time, stable chimerism can be kept.
Add the thermal expansion temperature and be the assurance temperature less than the bearing apparatus for wheel component parts.At this, the so-called temperature that guarantees (for example refers to bring into play the employed component parts of wheel bearing arrangement, packing seal, grease, retainer, coder etc.) the temperature of function, if guarantee temperature less than this, then can not damage the function of each component parts.
Like this, add the thermal expansion temperature less than the assurance temperature of bearing apparatus for wheel component parts by making, can make effectively their function of performance such as the employed packing seal of this bearing apparatus for wheel and grease, can guarantee the quality as bearing apparatus for wheel.
As the heating arrangement of the heating of before being pressed into, carrying out, as long as can make aperture 22 hole enlargements of wheel hub ring 1, and heat in the scope that is no more than above-mentioned assurance temperature and to get final product, therefore, can use the various heating arrangements such as heating furnace, heater.
But, in the respective embodiments described above, form the spline 41 that consists of protuberance 35 in axial region 12 sides, simultaneously, the spline 41 of this axial region 12 is implemented cure process, the aperture surface of wheel hub ring 1 is made unhardened (raw MAT'L).Relative therewith, also can be shown in Figure 21 A of the 5th embodiment, form the spline 61 (being consisted of by raised line 61a and recessed 61b) of having implemented cure process at the aperture surface of the hole of wheel hub ring 1 one 22, simultaneously, do not implement cure process at axial region 12.In addition, the various job operations such as processing, cutting, punch process, stretch process of namely broaching by public method also can form this spline 61.In addition, processing also can be adopted the various heat treatments such as high-frequency induction quenching, carburizing and quenching as heat curing.
In this situation, make the projected direction middle part of protuberance 35 corresponding with the position that recess forms front recess formation face (the outer diametric plane of axial region 12).Namely, be that circle diameter size (protuberance 35 the path size) D4 on the summit of protuberance 35 is set as the outside dimension D6 less than axial region 12 with the protuberance 61a that links spline 61, and circle diameter size (the chimeric internal diameter size with the hole aperture surface between the protuberance) D5 of bottom that will link the recess 61b of spline 61 is set as the outside dimension D6 greater than axial region 12.That is, be made as D4＜D6＜D5.
If axial region 12 is pressed into the hole section 22 of wheel hub ring 1, then can form by the protuberance 35 of wheel hub ring 1 side the recess 36 of chimeric this protuberance 35 at the outer peripheral face of axial region 12.Thus, make protuberance 35 and connect airtight with the integral body that protuberance 35 carries out the chimeric contact site 38 of chimeric recess.
Namely, be arranged at the protuberance 35 with concavo-convex embedded structure M in the situation of aperture surface 37 of hole section 22 of wheel hub ring 1, make the protuberance 35 of wheel hub ring 1 side clamp-on the outer diametric plane of axial region 12, thus, the hole section 22 of wheel hub ring 1 becomes and has carried out a little state of hole enlargement, to allow protuberance 35 in axial movement, if stop axial movement, then hole section 22 carries out undergauge to revert to original bore.Thus, protuberance 35 connects airtight with the chimeric contact site integral body that is embedded in the recess 36 (the outer diametric plane of axle) of the other side's parts of this protuberance 35.
At this, so-called chimeric contact site 38 is the scopes 76 shown in Figure 21 B, namely the midriff of the chevron from the cross section of protuberance 35 to the mountain top this scope.In addition, between axially adjacent protuberance 35, lean on the position of outside diameter to be formed with gap 62 at the outer peripheral face than axial region 12.
Like this, be arranged at the protuberance 35 with concavo-convex embedded structure M in the situation of aperture surface 37 of hole section 22 of wheel hub ring 1, process (heat treatment) owing to needn't carry out the hardness of axial region 12 sides, thereby the capacity rating of the outer ring 5 of Constant velocity joint 3 be excellent.
Owing to also be to form the section of extruding 45 by being pressed in this situation, thereby preferred the setting taken in this pit part of extruding section 45 50.Owing to make the section of extruding 45 be formed at the mouth side of axial region 12, thereby pit part can be arranged at wheel hub ring 1 side.
In addition, both can form so the protuberance 35 of concavo-convex embedded structure M in wheel hub ring 1 side, the axle extension of the aligning when its outside dimension being become be pressed into wheel hub ring 1 also can be set in the end of the mouth opposition side of axial region 12.
More than, embodiments of the present invention are illustrated, but, the invention is not restricted to above-mentioned embodiment but various distortion can be arranged, for example as the shape of the protuberance 35 of concavo-convex embedded structure M, be triangle in above-mentioned embodiment middle section shown in Figure 2, be trapezoidal (Fuji shape) in embodiment middle section shown in Figure 4, but also can adopt the various shapes such as semi-circular shape beyond these, half-oval shaped, rectangular shape, and the area of protuberance 35, quantity, circumferentially disposition interval etc. can change arbitrarily also.That is, needn't form spline 41,61, and have this spline 41,61 protuberance (double wedge) 41a, 61a and make the protuberance 35 of concavo-convex embedded structure M, but both can be the such structure of key, also can be the matching surface of the waveform of forming curves shape.Key is, as long as will be pressed into the other side's side along the protuberance 35 of axial arrangement, make by this protuberance 35 and to connect airtight chimeric recess 36 with protuberance 35 and be formed at the other side's side, protuberance 35 and the integral body of the chimeric contact site 38 of the recess that is embedded in protuberance 35 are connected airtight, and the transmission of carrying out torque between wheel hub ring 1 and Constant velocity joint 3 gets final product.
In addition, can be profile holes such as polygonal holes beyond the circular hole as the hole section 22 of wheel hub ring 1, the cross sectional shape of end that is intercalated in the axial region 12 of this hole section 22 also can be the odd-shaped cross sections such as polygon beyond the round section.In addition, owing to when axial region 12 is pressed into wheel hub ring 1, as long as only make the hardness ratio of the top section that is pressed into of protuberance 35 form the hardness height at the position of recess 36, thereby the hardness of protuberance 35 integral body is uprised.In Fig. 2 etc., be formed with gap 40, but also can be to clamp-on the aperture surface 37 of wheel hub ring 1 to the recess to 35 of protuberances.In addition, form the difference of hardness of face side as protuberance 35 sides with at the recess that protuberance 35 forms, preferably count more than 30% by HRC as mentioned above, as long as but protuberance 35 can be pressed into, then also can be less than 30%.
The end face of protuberance 35 (being pressed into top) is in the above-described embodiment for to be orthogonal to axial face, but also can be the face that tilts with respect to axial as prescribed angle.In this situation, both can be from internal side diameter to outside diameter in the run-off the straight of protuberance opposition side, also can be in the projection run-off the straight.
In addition, shape as pit part 50, in the above-described embodiment its circumferential slot 51 is made the side 51b that makes the spline opposition side carries out hole enlargement to the spline opposition side from bottom land 51c the conical surface, but also can not make such conical surface, key is, gets final product so long as can take in the section that extrudes 45 of (accommodating) generation, therefore, as the capacity of pit part 50, get final product so long as can adapt to the section that extrudes 45 that produces.
In the situation that is provided with sawtooth section 55, it is the axial end portion (pit part side) that it is arranged at spline 41 in Fig. 8, but both it can be arranged at oral area 11 sides of opposition side, also it can be arranged at the axial pars intermedia of spline 41, in addition, also can be arranged at the entire axial length of spline 41.In addition, the number of the protuberance of each sawtooth section 55 (double wedge) 55a and shape etc. also can change arbitrarily, as sawtooth section 55, both can be arranged at circumferentially all-round protuberance 35, also can be arranged at arbitrarily protuberance 35 in circumferentially all-round protuberance 35.In addition, in embodiment, sawtooth section 55 is arranged at the protuberance 41a of the spline 41 that consists of protuberance 35, but also sawtooth section 55 can be arranged at the recess 41b of spline 41.
In addition, when protuberance 35 is pressed into, both can be fixed and make a side shifting that is formed with protuberance 35 to a side of formation recess 36, on the contrary, also can be fixed a side that forms protuberance 35 and make a side shifting that is formed with recess 36, also can make both and move.In addition, the rolling body 30 as antifriction-bearing box 2 also can use roller.In Constant velocity joint 3, also can inner ring 6 and axle 10 be formed one by the described concavo-convex embedded structure M of the respective embodiments described above.
Utilizability on the industry
Applicable to the integrally formed third generations of arranging an inner track face of antifriction-bearing boxs of the periphery of the wheel hub ring that has the wheel mounting flange in one more, in addition, also applicable to integrated Constant velocity joint on wheel hub ring and in the 4th generations of another inner track face of the integrally formed many row's antifriction-bearing boxs of the periphery of the lateral joint parts that consist of this constant speed Hooke's coupling.

Claims (23)

1. bearing apparatus for wheel, with wheel hub ring, arrange antifriction-bearing box and Constant velocity joint carries out modularization, described many row's antifriction-bearing boxs have more: outside parts, it is being formed with how exclusive siding track face interior week; Inner part, its by have in periphery with the wheel hub ring of the opposed inner track face of described how exclusive siding track face and outside be embedded in the path stage portion of this wheel hub ring and the inner ring that is formed with opposed another inner track face of described how exclusive siding track face in periphery consists of; Many row's balls, its rolling is contained between two orbital planes of this inner part and described outside parts freely, it is characterized in that,
Have axial region and the concavo-convex embedded structure of wheel hub ring shape all-in-one-piece with the lateral joint parts of Constant velocity joint, with the protuberance that is arranged at either party in the aperture surface of hole section of the outer diametric plane of axial region of lateral joint parts and wheel hub ring and extends vertically along axially being pressed into the opposing party, connect airtight chimeric recess by protuberance formation with protuberance the opposing party, the described concavo-convex embedded structure that formation is connected airtight the chimeric contact site integral body of protuberance and recess, and non-interference fit is made in the cooperation of the path stage portion of the described inner ring of the antifriction-bearing box in the scope corresponding with outside diameter of concavo-convex embedded structure and wheel hub ring, simultaneously interference fit is made in the cooperation of the path stage portion of the described inner ring of the antifriction-bearing box in other scopes and wheel hub ring.
2. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
On the parts of the described outside, connect and compose the steering swivel of suspension gear via the integrated connection structure of Nonseparation.
3. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
Be pushed down into the axial region of lateral joint parts by the state that has carried out adding thermal expansion in the hole section to wheel hub ring, consist of the protuberance of outer diametric plane of the axial region that makes the lateral joint parts and the chimeric contact site integral body of recess of aperture surface that is embedded in the wheel hub ring of this protuberance and connect airtight the described concavo-convex embedded structure that forms.
4. bearing device for vehicle as claimed in claim 1 is characterized in that,
Formation is used the tapering along the centering that is pressed into the direction undergauge in the hole of described wheel hub ring section, via the tapering axial region of lateral joint parts is pressed into the hole section of described wheel hub ring, consists of the protuberance of outer diametric plane of the axial region that makes the lateral joint parts and the chimeric contact site integral body of recess of aperture surface that is embedded in the wheel hub ring of this protuberance and connect airtight the described concavo-convex embedded structure that forms.
5. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
The described inner ring aperture surface of the antifriction-bearing box in the scope corresponding with outside diameter of described concavo-convex embedded structure forms circumferential cut section, to consist of described non-interference fit.
6. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
Diametric plane forms circumferential cut section outside the path stage portion of the wheel hub ring in the scope corresponding with outside diameter of described concavo-convex embedded structure, to consist of described non-interference fit.
7. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
The protuberance of described concavo-convex embedded structure is set at the axial region of the lateral joint parts of Constant velocity joint, and the inside diameter of the hole section of the hardness ratio wheel hub ring of the axial end portion of this protuberance is high at least, and by described axial region being pressed into the hole section of wheel hub ring from the axial end portion side of protuberance, utilize this protuberance, aperture surface formation is connected airtight chimeric recess with protuberance in the hole of wheel hub ring section, consists of described concavo-convex embedded structure.
8. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
The protuberance of described concavo-convex embedded structure is set at the aperture surface of the hole of wheel hub ring section, and the outer diameter part of the axial region of the lateral joint parts of the hardness ratio Constant velocity joint of the axial end portion of this protuberance is high at least, and by the protuberance of described wheel hub ring side being pressed into the axial region of lateral joint parts from its axial end portion side, utilize this protuberance, form with protuberance at the outer diametric plane of the axial region of lateral joint parts and to connect airtight chimeric recess, consist of described concavo-convex embedded structure.
9. bearing apparatus for wheel as claimed in claim 2 is characterized in that,
Integrated connection structure is made of the riveted joint of steering swivel and/or outside parts.
10. bearing apparatus for wheel as claimed in claim 2 is characterized in that,
Integrated connection structure is by being installed on being consisted of by the riveted joint of riveted joint parts between steering swivel and the outside parts.
11. bearing apparatus for wheel as claimed in claim 2 is characterized in that,
Integrated connection structure is made of the welding between steering swivel and the outside parts.
12. bearing apparatus for wheel as claimed in claim 3 is characterized in that,
Add the thermal expansion temperature less than the assurance temperature of bearing apparatus for wheel component parts.
13. bearing apparatus for wheel as claimed in claim 7 is characterized in that,
The axial region that is arranged at the lateral joint parts based on the described pit part that forms the section that extrudes of connecting airtight the formation of chimeric recess with described protuberance and generating at the hole of wheel hub ring section aperture surface will be taken in.
14. bearing apparatus for wheel as claimed in claim 8 is characterized in that,
The pit part of taking in outer diametric plane based on described axial region at the lateral joint parts and form the section that extrudes of connecting airtight the formation of chimeric recess with described protuberance and generating is arranged at the aperture surface of the hole section of wheel hub ring.
15. bearing apparatus for wheel as claimed in claim 13 is characterized in that,
With take in the described pit part of extruding section be arranged at the lateral joint parts axial region protuberance be pressed into the top side, simultaneously in convex shoulder that the hole section aligning of the opposition side setting of the axial upper convex portion of this pit part and wheel hub ring is used.
16. bearing apparatus for wheel as claimed in claim 7 is characterized in that,
The middle part of the projected direction of the protuberance of the axial region of lateral joint parts is corresponding with the position that the hole section recess of wheel hub ring forms front recess formation face.
17. bearing apparatus for wheel as claimed in claim 7 is characterized in that,
The internal diameter size of the aperture surface of the hole section of wheel hub ring is set as, less than the greatest diametrical dimension of the circle on the summit of the spline protuberance of the axial region that links the lateral joint parts, greater than the greatest diametrical dimension of the circle of the bottom of the spline recess of the outer diametric plane of the axial region between the spline protuberance of the axial region that links the lateral joint parts.
18. bearing apparatus for wheel as claimed in claim 8 is characterized in that,
Link the diameter dimension of circular arc on summit of a plurality of protuberances of hole section of wheel hub ring less than the outside dimension of the axial region of lateral joint parts,
The internal diameter size of the hole section aperture surface between the protuberance is greater than the outside dimension of the axial region of lateral joint parts.
19. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
The circumferential thickness of the projected direction middle part of protuberance is less than the circumferential size of the position corresponding with described middle part between the circumferential adjacent protuberance in edge.
20. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
The summation of the circumferential thickness of the projected direction middle part of protuberance is less than being embedded in along the summation of the circumferential thickness of the position corresponding with described middle part of the protuberance of the other side's side between the circumferentially adjacent protuberance.
21. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
In axial at least a portion setting of described protuberance along axial jog.
22. bearing apparatus for wheel as claimed in claim 21 is characterized in that,
Described jog forms zig-zag.
23. such as each described bearing apparatus for wheel in the claim 1～22, it is characterized in that,
The lateral joint parts of described Constant velocity joint have the oral area of in-built inner contact parts and give prominence to the described axial region that arranges from the bottom of this oral area, with the riveted joint of the end of wheel hub ring and via the described inner ring of the antifriction-bearing box that is embedded in wheel hub ring outward antifriction-bearing box is applied prefilling force, make described oral area and wheel hub ring end formation contactless state.
CN2008800094425A 2007-03-22 2008-03-13 Bearing device for wheel Expired - Fee Related CN101641225B (en)

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
JP2007075103A JP5143455B2 (en) 2007-03-22 2007-03-22 Drive wheel bearing device
JP075103/2007 2007-03-22
JP131813/2007 2007-05-17
JP2007131815A JP2008285000A (en) 2007-05-17 2007-05-17 Wheel bearing device
JP2007131813A JP4294704B2 (en) 2007-05-17 2007-05-17 Wheel bearing device
JP131815/2007 2007-05-17
JP2007142492A JP5301114B2 (en) 2007-05-29 2007-05-29 Wheel bearing device
JP142492/2007 2007-05-29
JP2007150736A JP2008303943A (en) 2007-06-06 2007-06-06 Bearing device for wheel
JP150736/2007 2007-06-06
PCT/JP2008/054660 WO2008114698A1 (en) 2007-03-22 2008-03-13 Bearing device for wheel

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