CN211222888U

CN211222888U - Wheel hub unit for four-wheel drive vehicle

Info

Publication number: CN211222888U
Application number: CN201922040009.6U
Authority: CN
Inventors: 周均
Original assignee: Taizhou Chuanghao Wheel Hub And Bearing Co ltd
Current assignee: Taizhou Chuanghao Wheel Hub And Bearing Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-08-11
Anticipated expiration: 2029-11-21

Abstract

The utility model discloses a wheel hub unit for four-wheel drive vehicle, including flange axle and the double-row tapered roller bearing of suit on the flange axle, the inner circle outer end of double-row tapered roller bearing sets up a spline dish, flange axle head turns up and forms the ring flange and realizes riveting with the spline dish, the spline dish hole sets up the internal spline, the position of installing the spline dish on the flange axle sets up the external spline; the internal spline and the external spline are correspondingly connected in a matching way. The utility model relates to a, through inside and outside splined connection between its spline dish and the flange axle, this connection structure can not influence the self quality of spline dish, can effectively promote its and flange axle's joint strength simultaneously, and its phenomenon that can fundamentally stop the spline dish rotation takes place, has the characteristics that simple structure is practical.

Description

Wheel hub unit for four-wheel drive vehicle

Technical Field

The utility model relates to a four-wheel drive vehicle specifically is a wheel hub unit for four-wheel drive vehicle.

Background

As shown in fig. 1 and 2, a double-row tapered roller bearing 2 'is sleeved on a flange shaft 1', the inner end of an inner ring 21 'of the double-row tapered roller bearing 2' is abutted against a stop protrusion 11 'on the inner side of the flange shaft 1', a spline disc 3 'is arranged at the outer end of the inner ring 21', the inner hole of the spline disc 3 'is connected with the flange shaft 1' by interference, and after the two are assembled, a flange plate is formed by turning up a flange head 12 'and riveted with the spline disc 3', so that the flange shaft 1 'and the spline disc 3' are fixed into a whole to transmit torque.

In addition, in order to realize the circumferential limit of the spline disc 3 ', the upper surface of the flange shaft 1' is provided with an anti-loosening groove 13 'which is distributed along the axial direction, and after the spline disc 3' is assembled and riveted, the spline disc 3 'is deformed by using external extrusion pressure and enters the anti-loosening groove 13' to realize clamping, so that the circumferential anti-loosening effect is achieved.

However, in the above structure, the magnitude of interference between the spline disc 3 'and the flange shaft 1' is ensured by the machining precision of the machine tool, the value of the interference directly affects the magnitude of the torque, and if the magnitude of the interference is too small, the spline disc 3 'and the flange shaft 1' can rotate to cause the product to fail.

Moreover, the method of utilizing outer extrusion pressure to make the spline dish 3 ' warp and enter into the anti-loosening groove 13 ' has very big not enough, and it not only can influence the quality of spline dish 3 ' itself, and the reliability of processing is very little simultaneously, often can appear that the spline dish 3 ' warp not enough effectively to enter into the anti-loosening groove 13 ', and its result also can lead to the circumference of spline dish 3 ' and flange axle 1 ' to restrain inadequately, produces the rotation, makes the product inefficacy.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model discloses a wheel hub unit for four-wheel drive, through inside and outside splined connection between its spline dish and the flange axle, this connection structure can not influence the self quality of spline dish, can effectively promote its and flange axle's joint strength simultaneously, and its phenomenon that can fundamentally stop the spline dish rotation takes place, has the characteristics that simple structure is practical.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a wheel hub unit for four-wheel drive, includes flange axle and the epaxial double-row tapered roller bearing of suit at the flange, and double-row tapered roller bearing's inner circle outer end sets up a spline dish, and flange axle head turns up and forms the ring flange and realizes riveting its characterized in that with the spline dish: the inner hole of the spline disc is provided with an internal spline, and the position of the flange shaft for mounting the spline disc is provided with an external spline; the internal spline and the external spline are correspondingly connected in a matching way.

Furthermore, the inner end of the inner ring of the double-row tapered roller bearing is connected with a stop bulge on the inner side of the flange shaft in an abutting mode.

Furthermore, the surface and the stop bulge of the flange shaft are provided with reinforced parts which are processed by induction quenching and tempering.

The spline disc and the flange shaft in the technical scheme are correspondingly connected through the matching of the internal spline and the external spline. This structural arrangement has the following advantages:

1. interference fit is not needed, the requirement on the machining precision of the patterned keyboard and the flange shaft can be reduced to a certain extent, and the assembly is simplified;

2. the spline disc does not need to be extruded in the assembling process, and the quality of the spline keyboard cannot be damaged;

3. the internal and external splines are assembled and connected, circumferential constraint is realized through the ratchets which are clamped with each other, the constraint size is not affected by assembly errors, and the phenomenon of constraint failure can be fundamentally avoided.

Drawings

FIG. 1 is a schematic structural view of a hub unit for a conventional four-wheel drive vehicle;

FIG. 2 is a sectional view taken along the line A-A in FIG. 1;

FIG. 3 is a schematic structural view of the present invention;

fig. 4 and 3 are sectional views taken along the direction B-B.

Detailed Description

As shown in figures 3 and 4, the hub unit for the four-wheel drive vehicle comprises a flange shaft 1 and a double-row tapered roller bearing 2 sleeved on the flange shaft 1, wherein the inner end of an inner ring 21 of the double-row tapered roller bearing 2 is connected with a stop protrusion 11 on the inner side of the flange shaft 1 in an abutting mode, a spline disc 3 is arranged on the outer end of the inner ring 21 of the double-row tapered roller bearing 2, and a flange plate is formed by outwards turning a flange head 12 of the flange shaft to be riveted with the spline disc 3.

The inner hole of the spline disc 3 is set as an inner spline 31, and the position of the flange shaft 1 where the spline disc 3 is installed is set as an outer spline 13; the internal spline 31 and the external spline 13 are matched and correspond to each other to realize the clamping connection.

Spline disc 3 among the above technical scheme and flange axle 1 correspond through the cooperation of inside and outside spline and realize connecting, and it can make spline disc 3 and flange axle 1's transmission more stable, more reliable, and this structural setting compares current structure and has following advantage:

1. interference fit is not needed between the spline disc 3 and the flange shaft 1, the requirement on the machining precision of the spline keyboard 3 and the flange shaft 3 can be reduced to a certain extent, and assembly is simplified;

2. the spline disc 3 does not need to be extruded by external force in the assembling process, the patterned keyboard 3 cannot be damaged, and the assembling quality of the spline disc 3 can be ensured;

The flange shaft 1 is provided with the enhanced part 1a which is processed by induction quenching and tempering on the shaft diameter surface and the stop bulge 11, thereby not only reducing the use abrasion, but also mainly effectively enhancing the self strength of the flange shaft 1 and avoiding the shaft breakage phenomenon in use.

The above, it is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical principles of the present invention to any simple modification, equivalent change or decoration of the above embodiments, still belong to the technical solution of the present invention.

Claims

1. The utility model provides a wheel hub unit for four-wheel drive, includes flange axle and the epaxial double-row tapered roller bearing of suit at the flange, and double-row tapered roller bearing's inner circle outer end sets up a spline dish, and flange axle head turns up and forms the ring flange and realizes riveting its characterized in that with the spline dish: the inner hole of the spline disc is provided with an internal spline, and the position of the flange shaft for mounting the spline disc is provided with an external spline; the internal spline and the external spline are correspondingly connected in a matching way.

2. A hub unit for a four-wheel drive vehicle according to claim 1, wherein: the inner end of the inner ring of the double-row tapered roller bearing is connected with the stop bulge on the inner side of the flange shaft in an abutting mode.

3. A hub unit for a four-wheel drive vehicle according to claim 2, wherein: and the surface and the stop bulge of the flange shaft are provided with reinforced parts which are processed by induction quenching and tempering.