CN211202608U - Wheel hub bearing and car - Google Patents

Abstract

The application provides a wheel hub bearing and car relates to car technical field. The application provides a hub bearing includes: a drive shaft and a bearing; the driving shaft is provided with an external spline; the bearing is provided with an internal spline connected with the external spline: the bearing comprises a bearing body, a driving shaft is arranged on the bearing body, the driving shaft comprises a first end face, a plurality of first bulges are arranged on the first end face and distributed in an annular mode, the bearing body comprises a second end face, a plurality of second bulges are arranged on the second end face and distributed in an annular mode, grooves are formed between every two adjacent second bulges, and the first bulges are matched with the grooves. The automobile that this application provided includes the wheel hub bearing that this application provided to send out the technical problem of abnormal sound when alleviating the gear shift that exists among the prior art.

Description

Wheel hub bearing and car

Technical Field

The application relates to the technical field of automobiles, in particular to a hub bearing and an automobile.

Background

With the popularization of new energy automobiles, the new energy automobiles mainly comprise motors, speed reducers and driving shafts, but the pulsation value of the torque output by the motor driving is large, the instantaneous dynamic torque is high, the driving structure which is the same as that of a fuel oil automobile is adopted in the driving process of the automobiles, namely, the internal and external splines between the driving shafts and the hub shafts transmit torque, the internal and external splines are in clearance fit, the matching length of the internal and external splines is long, when the torque of the motor speed reducer is transmitted, the driving shafts and one end of the hub shafts have relative torsion trend or angle, so that the problems of 'rattling' abnormal sound, reduced mechanical efficiency, slow starting response and the like during starting and gear shifting.

SUMMERY OF THE UTILITY MODEL

The application provides a wheel hub bearing and car to send out the technical problem of abnormal sound when alleviating the gear shift that exists among the prior art.

The present application provides in a first aspect a hub bearing comprising:

a drive shaft provided with an external spline;

the bearing, be equipped with the internal spline that external spline connects:

the bearing comprises a bearing body, a driving shaft is arranged on the bearing body, the driving shaft comprises a first end face, a plurality of first bulges are arranged on the first end face and distributed in an annular mode, the bearing body comprises a second end face, a plurality of second bulges are arranged on the second end face and distributed in an annular mode, grooves are formed between every two adjacent second bulges, and the first bulges are matched with the grooves.

In one possible design, a plurality of the first protrusions are arranged in central symmetry with respect to a central axis of the drive shaft;

the plurality of grooves are arranged in a central symmetry with respect to a central axis of the bearing.

In one possible design, the peaks of the first projection conform to the valleys of the groove.

In one possible design, the number of first protrusions and grooves is equal.

In one possible design, the first protrusions have the same shape and size, the grooves have the same shape and size, and the second protrusions have the same shape and size.

In one possible design, the first projection and the second projection are each wedge-shaped.

In one possible design, the internal spline has a zero clearance fit with the external spline.

In one possible embodiment, the bearing is fixed to the drive shaft by a fixing pin.

In one possible design, the hub bearing further comprises a hub, which is an interference fit with the bearing.

In a second aspect, the present application provides an automobile comprising any one of the hub bearings.

The technical scheme provided by the application can achieve the following beneficial effects:

the application provides a hub bearing includes: a drive shaft and a bearing; the driving shaft is provided with an external spline; the bearing is equipped with the internal spline with external spline connection: the torque transmission between the driving shaft and the bearing adopts an internal spline structure and an external spline structure, so that the energy loss can be reduced, and the transmission efficiency is improved. The drive shaft includes first terminal surface, is equipped with a plurality of first archs on the first terminal surface, and a plurality of first protruding annular distribute, and the bearing includes the second terminal surface, is equipped with a plurality of second archs on the second terminal surface, and a plurality of second protruding annular distribute forms the recess between two adjacent second archs, first protruding and recess cooperation. The end face of the driving shaft, which is contacted with the bearing, forms an axial jaw structure through the first protrusion and the groove. When the vehicle starts and shifts gears, the bearing and the internal and external spline structure of the driving shaft transmit driving torque; the axial line jaw type structure formed by the first protrusion and the groove prevents the relative twisting trend or rotation of the first protrusion and the groove, so that the rattling abnormal sound during starting and gear shifting is eliminated.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as provided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an isometric view of a hub bearing provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a bearing in a hub bearing according to an embodiment of the present application

FIG. 3 is a sectional view taken along line B-B of FIG. 2;

FIG. 4 is an enlarged view at c of FIG. 3;

FIG. 5 is a schematic structural diagram of a driving shaft in a hub bearing according to an embodiment of the present disclosure

FIG. 6 is a sectional view taken along line D-D of FIG. 5;

fig. 7 is an enlarged view at E in fig. 6.

Reference numerals:

1-a drive shaft;

11-a first end face;

111-a first projection;

2-a bearing;

21-a second end face;

211-a second protrusion;

212-a groove;

22-internal spline.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

Example one

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, and fig. 7, a hub bearing provided in an embodiment of the present application includes: a drive shaft 1 and a bearing 2; the driving shaft 1 is provided with an external spline; the bearing 2 is provided with an internal spline 22 connected with an external spline: the torque transmission between the driving shaft 1 and the bearing 2 adopts an internal spline 22 and an external spline structure, so that the energy loss can be reduced, and the transmission efficiency can be improved. The drive shaft 1 comprises a first end face 11, a plurality of first protrusions 111 are arranged on the first end face 11, the first protrusions 111 are distributed annularly, the bearing 2 comprises a second end face 21, a plurality of second protrusions 211 are arranged on the second end face 21, the second protrusions 211 are distributed annularly, a groove 212 is formed between every two adjacent second protrusions 211, and the first protrusions 111 are matched with the groove 212. The end surface of the drive shaft 1 contacting the bearing 2 is formed into an axial jaw structure by the first protrusion 111 and the groove 212. When the vehicle starts and shifts gears, the bearing 2 and the internal and external spline structure of the driving shaft 1 transmit driving torque; the axial jaw type structure formed by the first protrusion 111 and the groove 212 prevents the relative twisting trend or rotation of the first protrusion, so that the 'rattle' abnormal sound is eliminated during starting and gear shifting.

As shown in fig. 2 and 5, the plurality of first protrusions 111 are arranged centrosymmetrically with respect to the central axis of the drive shaft 1; the plurality of grooves 212 are arranged in central symmetry with respect to the central axis of the bearing 2. The axis jaw structure formed by the first protrusions 111 and the grooves 212 prevents the bearing 2 and the driving shaft 1 from twisting or rotating relatively, so that 'rattling' abnormal sound during starting and gear shifting is eliminated.

In a specific embodiment, the peak of the first protrusion 111 and the valley of the groove 212 are in the same shape, so that the bearing 2 and the drive shaft 1 are prevented from relative twisting tendency or rotation, and the rattling noise is eliminated during starting and gear shifting.

In a specific embodiment, the number of the first protrusions 111 and the number of the grooves 212 are equal. The first protrusion 111 is fitted with the groove 212. The end face of the drive shaft 1, which is contacted with the bearing 2, forms an axial line jaw structure through the first bulge 111 and the groove 212, and when the vehicle starts and shifts gears, the bearing 2 and the drive shaft 1 transmit driving torque through an internal spline structure and an external spline structure; the axial jaw type structure formed by the first protrusion 111 and the groove 212 prevents the relative twisting trend or rotation of the first protrusion, so that the 'rattle' abnormal sound is eliminated during starting and gear shifting.

In a specific embodiment, the shape and size of the first protrusions 111 are the same, the shape and size of the grooves 212 are the same, and the shape and size of the second protrusions 211 are the same, so that the bearing 2 and the driving shaft 1 are prevented from twisting or rotating relatively, and therefore 'rattling' noise during starting and gear shifting is eliminated.

In a specific embodiment, the first protrusion 111 and the second protrusion 211 are wedge-shaped, so as to prevent the bearing 2 and the driving shaft 1 from twisting or rotating relatively, thereby eliminating the rattling noise during starting and gear shifting.

In a specific embodiment, the inner spline 22 and the outer spline are in gapless fit, so that the bearing 2 and the driving shaft 1 are prevented from being twisted or rotated relatively, and the rattling noise during starting and gear shifting is eliminated.

In a specific embodiment, the bearing 2 is fixed with the driving shaft 1 by a fixing pin, so that the reliability of the connection between the driving shaft 1 and the bearing 2 can be improved, and the assembly is simple.

In a specific implementation mode, the wheel hub bearing still includes wheel hub, and wheel hub and 2 interference fit of bearing, it is concrete, wheel hub and the cooperation of the outer lane of bearing 2, drive shaft 1 drives the inner circle of bearing 2 and rotates, drive shaft 1 and the fixed structure of bearing 2 inner circle through the spline to can reduce the energy loss in spline fit clearance, promote transmission efficiency, subtract heavy oil consumption that falls, practice thrift the arrangement space.

Example two

The automobile provided by the second embodiment of the application comprises the hub bearing in any one technical scheme of the second embodiment of the application. The automobile provided by the second embodiment of the present application and the hub bearing in the first embodiment have the same advantages as the prior art, and are not described herein again.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A hub bearing, comprising:

a drive shaft provided with an external spline;

the bearing, be equipped with the internal spline that external spline connects:

the bearing comprises a bearing body, a driving shaft is arranged on the bearing body, the driving shaft comprises a first end face, a plurality of first bulges are arranged on the first end face and distributed in an annular mode, the bearing body comprises a second end face, a plurality of second bulges are arranged on the second end face and distributed in an annular mode, grooves are formed between every two adjacent second bulges, and the first bulges are matched with the grooves.

2. The hub bearing of claim 1, wherein the plurality of first protrusions are arranged centrosymmetrically with respect to a central axis of the drive shaft;

the plurality of grooves are arranged in a central symmetry with respect to a central axis of the bearing.

3. The hub bearing of claim 1, wherein the peaks of the first projection conform to the valleys of the groove.

4. The hub bearing of claim 1, wherein the first protrusions are equal in number to the recesses.

5. The hub bearing of claim 1, wherein the first plurality of protrusions are identical in shape and size, the plurality of recesses are identical in shape and size, and the second plurality of protrusions are identical in shape and size.

6. The hub bearing of claim 1, wherein the first and second projections are each wedge-shaped.

7. The hub bearing of claim 1, wherein the internal spline has a zero-clearance fit with the external spline.

8. The hub bearing of claim 1, wherein the bearing is secured to the drive shaft by a retaining pin.

9. The hub bearing according to any one of claims 1 to 8, further comprising a hub having an interference fit with the bearing.

10. An automobile comprising the hub bearing according to any one of claims 1 to 9.

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