KR20150066940A

KR20150066940A - An assembly of wheel bearing and constant velocity joint

Info

Publication number: KR20150066940A
Application number: KR1020130152600A
Authority: KR
Inventors: 유충희
Original assignee: 지엠 글로벌 테크놀러지 오퍼레이션스 엘엘씨
Priority date: 2013-12-09
Filing date: 2013-12-09
Publication date: 2015-06-17
Also published as: KR101530444B1

Abstract

The present invention relates to a wheel bearing and a constant velocity joint assembly which can be fastened with a simple structure using a spline plate, and a wheel bearing and a constant velocity joint structure according to an embodiment of the present invention includes a hub having a spline formed on the vehicle body side, A wheel bearing having an inner ring surrounding an outer peripheral surface of the hub, an outer ring surrounding the outer peripheral surface of the inner ring, and a bearing positioned between the inner and outer rings; And a spline plate disposed on an inner side of the coupling portion, wherein the coupling portion includes a coupling portion located on a wheel side and a housing opening portion formed by opening a part of the coupling portion, The stem portion used in the conventional fastening structure can be eliminated, and the effect of reducing the weight of the vehicle can be effectively obtained. Accordingly, by improving the fuel economy and by combining the hub and the constant velocity joint housing with the screw structure, The adjustment of the tightening torque of the bearing allows a more precise adjustment of the bearing preload.

Description

Wheel bearings and constant velocity joints [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel bearing and constant velocity joint assembly of a vehicle, and more particularly to an assembly of a wheel bearing and a constant velocity joint which can be fastened with a simpler structure using a spline plate

A constant velocity joint (CVJ) is a device that is installed on a drive shaft of a vehicle and transmits driving force to the wheels of the vehicle.

Vehicle constant velocity joints and wheel bearing assemblies have undergone a series of improvements and have been used for the first and second generations and most of the third generation assemblies in recent years.

FIG. 1 shows a general example of a third generation wheel bearing and constant velocity joint assembly used in recent years. As shown in FIG. 1, a general wheel bearing and constant velocity joint assembly includes a hub 11 to which a wheel (not shown) A wheel bearing 10 constituted by an outer ring 13 disposed on the outer side and an inner ring 12 and a bearing 14 and a stem 24 passing through one side of the hub 11 and fastened as a nut 25 on the other side And a spline having a shape corresponding to each other is formed on the inner circumferential surface of the hollow portion formed on the hub 11 and coupled to the wheel so that the driving force is transmitted to the wheel. The stem 24 must be made of a high strength material, and a high strength material generally has a high weight, so that it can not meet the recent demand for a light weight vehicle.

In the wheel bearing and the constant velocity joint assembly, it is necessary to adjust the preload of the bearing 14 positioned between the hub 11 and the outer ring 13 and the inner ring 12. In the conventional assembly, Although the preload is applied by adjusting the tightening torque of the nut 24, since the process of adjusting the tightening force of the stem 24 and the preload amount of the bearing is difficult and the nut 25 is loosened, The manufactured bearing may be used.

The orbital forming process is a process of applying a permanent preload to the bearing material by applying a certain preload of the bearing at the time of manufacture, which may cause internal deformation of the wheel bearing when a high load is applied during manufacture.

Korean Patent No. 801632 proposes a structure in which a wheel bearing is manufactured using an orbital forming process and a stem is attached to a stem end so that the stem is not installed through the hub but is fixed in the hub. In this case, since the stem can not be completely removed, there is still a problem with the preload adjustment of the bearing as well as the above-mentioned body weight problem.

(Patent Literature) Korea Patent No. KR 0801632 B1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wheel bearing and constant velocity joint assembly having a stamper which is more lightweight than the prior art.

It is also an object of the present invention to provide a wheel bearing and a constant velocity joint assembly that can perform the bearing preload adjustment process easily and precisely.

In order to attain the above object, a wheel bearing and constant velocity joint assembly according to the present invention includes a hub having a spline formed on a side surface of a vehicle body, an inner ring surrounding the outer circumferential surface of the hub, an outer ring surrounding the outer circumferential surface of the inner ring, A wheel bearing having a bearing positioned between the wheel bearing and the bearing; And a spline plate disposed on an inner side of the coupling portion, wherein the coupling portion includes a coupling portion located on a wheel side and a housing opening portion formed by opening a part of the coupling portion, Wherein the hub-side surface of the hub is inserted into the vehicle body side of the housing opening portion, and the hub and the housing are fastened by the spline plate.

Wherein the spline plate has an outer spline formed on an outer diameter surface and an inner spline formed on an inner diameter surface, a spline formed on the vehicle body side surface of the coupling portion is engaged with the outer spline, And is inserted into the housing opening portion and engaged with the inner spline.

It is preferable that the splines formed on the vehicle body side surfaces of the outer splines and the coupling portions are jaw-like splines corresponding to each other so that they can engage with each other.

The hub-side outer circumferential surface of the hub and the inner circumferential surface of the housing opening portion are coupled by a screw-engaging portion, and the inner ring is press-fitted according to the tightening torque of the screw-engaging portion to control the preload of the bearing.

Preferably, the wheel bearing and the constant velocity joint assembly further include a retainer disposed through a surface of the hub side of the hub and a center of the spline plate.

As described above, according to the wheel bearing and the constant velocity joint assembly of the present invention, since the wheel portion and the constant velocity joint are fastened using the spline plate, the stem portion used in the fastening structure can be eliminated, And the fuel efficiency can be improved.

In addition, the hub and the constant velocity joint housing are combined with the screw structure, so that it is possible to adjust the bearing preload more precisely by adjusting the tightening torque of the screw structure.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an axial sectional view of a conventional wheel bearing and constant velocity joint assembly generally applied to a vehicle; Fig.
2 is an axial cross-sectional view of a wheel bearing and constant velocity joint assembly according to an embodiment of the present invention.
Fig. 3 is a front view of the spline plate 220, which is a component of the wheel bearing and constant velocity joint assembly according to the present invention, seen from the wheel side.

The components constituting the wheel bearing and the constant velocity joint assembly according to the present invention can be used integrally or individually. In addition, some components may be omitted depending on the usage form.

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a wheel bearing and constant velocity joint assembly according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, the definitions of these terms should be described based on the contents throughout this specification.

Hereinafter, a wheel bearing and a constant velocity joint assembly according to an embodiment of the present invention will be described with reference to FIG.

The wheel bearing and constant velocity joint assembly according to one embodiment of the present invention includes a wheel bearing 100 and a constant velocity joint 200 that is fastened to the wheel bearing 100.

The wheel bearing 100 includes a hub 110, an inner ring 120, an outer ring 130, and a bearing 140.

The hub 110 is a hub bolt 111 located on the outer circumferential surface of the hub 110 and coupled to a wheel (not shown) to receive the driving force generated from the driving device of the vehicle from the constant velocity joint 200 to drive the wheel. A through hole 113 is formed at the center of the vehicle body side surface. A spline is formed around the through hole 113, and a thread is formed on the outer circumferential surface of the vehicle body side.

The inner ring 120 is disposed to surround the outer circumferential surface of the hub 110 on the vehicle body side, and is driven by interlocking with the driving of the hub 110.

The outer ring 130 surrounds the outer circumferential surfaces of the hub 110 and the inner ring 120 and is fixed to the vehicle body so as not to rotate in conjunction with the constant velocity joint 200.

The bearing 140 is positioned between the outer ring 130 and the hub 110 and the inner ring 120 to allow the hub 110 and the inner ring 120 to bear the load of the vehicle body and smoothly rotate, ) To adjust the preload of the bearing.

The constant velocity joint 200 includes a housing 210, a spline plate 220, and a retainer 230.

The housing 210 constitutes the outside of the constant velocity joint 200 and includes a coupling part 211 located on the vehicle body side of the housing 210 and a part of the coupling part 211 inserted and fastened to the vehicle body side of the hub 110 And a spline is formed on the side of the fastening portion 211 on the vehicle body side.

A screw thread corresponding to a screw thread formed on the outer circumferential surface of the hub 110 is formed on the inner circumferential surface of the opening of the housing 210 so that the hub 110 and the housing 210 form a screw coupling portion 212 and are fastened.

Accordingly, the inner ring 120, which is in contact with the outer side of the opening portion of the housing 210, can be press-fitted into the wheel side according to the tightening torque of the threaded portion 212 to adjust the preload of the bearing 140, Because the bearing preload can be adjusted more precisely than the preloaded bearing structure, it is possible to set the optimal bearing preload for each vehicle.

Therefore, it is possible to reduce noise and vibration of the bearing as well as to reduce the vibration of the bearing when the load is applied to the bearing, to increase the rigidity of the bearing, to improve the durability against high- And the fining phenomenon caused by vibration from the outside can be prevented by improving the positioning accuracy, reducing the smearing caused by the restriction of rotation, revolution, and sliding of the bearing, and vibrations transmitted from the outside.

Hereinafter, the spline plate 220, which is one of the main components of the present invention, will be described in detail with reference to FIG.

The spline plate 220 is located on the vehicle body side of the coupling portion 211 and has an outer spline 221 and an inner spline 222 and a through hole 223 formed at the center thereof.

The outer splines 221 are formed on the outer diameter surface of the spline plate 220 and are engaged with each other with a shape corresponding to the spline formed on the vehicle body side surface of the coupling portion 211.

The inner splines 222 are formed on the inner diameter surface of the spline plate 220 and are engaged with each other with a shape corresponding to the spline formed on the vehicle body side surface of the hub 110.

It is possible to eliminate the stem 24 used in the conventional fastening structure by fastening the wheel bearing 100 and the constant velocity joint 220 using the spline plate 220. [

Therefore, the effect of reducing the weight of the vehicle and improving the fuel economy can be obtained.

As shown, the outer splines 221 and the inner splines 222 may be formed in different shapes. For example, the outer splines 221 may be formed in the shape of a chin, which is used in a claw clutch for transmitting a large power, it is preferable that the spline of the coupling portion 211 coupled with the outer spline 221 has a shape corresponding to the spline.

It should be noted that the spline plate 220 according to the present invention must be fixed at all times, unlike the clutch structure which can be perturbed in the axial direction for use in gear shifting and the like.

Thus, even if the stem 24 is removed, the driving force can be smoothly transmitted from the constant velocity joint 200 to the wheel bearing 100.

The retainer 230 passes through the through hole 113 formed at the center of the vehicle body side of the hub 110 and the through hole 223 formed at the center of the spline plate 220 so that the clearance between the respective splines is adjusted, And prevents the threaded portion 212, to which the hub 110 and the housing 210 are coupled, from loosening.

As described above, according to the wheel bearing and constant velocity joint assembly according to the present invention, since the wheel bearing and the constant velocity joint are fastened using the spline plate, the weight problem of the vehicle body having the conventional fastening structure can be solved, The bearing preload can be adjusted more precisely as the housing is coupled with the screw structure.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that numerous modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims. And equivalents should also be considered to be within the scope of the present invention.

100: Wheel bearing
110: Hub
111: Hub bolt
120: inner ring
130: Outer ring
140: Bearings
200: constant velocity joint
210: Housing
211:
212:
220: Spline plate
221: Outer spline
222: inner spline
230: retainer
113, 223: through-hole

Claims

A wheel bearing having a hub on which a spline is formed on the vehicle body side, an inner ring surrounding the outer circumferential surface of the hub, an outer ring surrounding the outer circumferential surface of the inner ring, and a bearing positioned between the inner ring and the outer ring;
And a spline plate disposed on an inner side of the coupling portion, wherein the coupling portion includes a coupling portion located on a wheel side and a housing opening portion formed by opening a part of the coupling portion, &Lt; / RTI >
Characterized in that the vehicle body side surface of the hub is inserted into the vehicle body side of the housing opening portion and the hub and the housing are fastened by the spline plate.
Wheel bearings and constant velocity joint assemblies.

The method according to claim 1,
The spline plate has an outer spline 221 formed on an outer diameter surface and an inner spline 222 formed on an inner diameter surface,
A spline formed on the vehicle body side surface of the coupling portion is engaged with the outer spline 221 and a spline formed on the vehicle body side surface of the hub is inserted into the housing opening portion and engaged with the inner spline 222 ,
Wheel bearings and constant velocity joint assemblies.

3. The method of claim 2,
The splines formed on the outer spline 221 and the vehicle body side surface of the fastening portion,
Shaped spline corresponding to each other so as to be able to mesh with each other.
Wheel bearings and constant velocity joint assemblies.

The method according to claim 1,
The vehicle body side outer peripheral surface of the hub and the inner peripheral surface of the housing opening portion
And the inner ring is press-fitted in accordance with the tightening torque of the threaded portion to adjust a preload of the bearing.
Wheel bearings and constant velocity joint assemblies.

5. The method according to any one of claims 1 to 4,
And a retainer disposed through the hub-side surface of the hub and the center of the spline plate.
Wheel bearings and constant velocity joint assemblies.