CN219035341U

CN219035341U - Sealing structure of hub bearing

Info

Publication number: CN219035341U
Application number: CN202222555195.9U
Authority: CN
Inventors: 刘筷筷
Original assignee: Shanghai C&U Group Co Ltd; C&U Co Ltd
Current assignee: Shanghai C&U Group Co Ltd; C&U Co Ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2023-05-16
Anticipated expiration: 2032-09-22

Abstract

The utility model provides a sealing structure of a hub bearing, wherein a first sealing part is arranged at a position, corresponding to an opening, of an outer side channel of the hub bearing, a second sealing part is arranged at a position, corresponding to an opening, of an inner side channel of the hub bearing, and sealing mechanisms for sealing gaps between an inner flange and an outer flange of the bearing are respectively arranged at the first sealing part and the second sealing part, the sealing mechanisms comprise a first framework, corresponding to the inner wall of the outer flange of the bearing, in close fit, and a second framework, corresponding to the inner flange of the bearing, a sealing part is arranged between the first framework and the second framework, a labyrinth channel is formed by the sealing part, a spring ring is arranged in fit with the sealing part, corresponding to the second framework, and the sealing part corresponding to the second framework is tightly pressed on the second framework by the spring ring through the spring ring in a ring-shaped tightening manner, so that the sealing part can still be tightly pressed after the sealing part is used for a long time, the deformation of the spring ring can be continuously pressed, the service life is prolonged, and the sealing performance is optimized.

Description

Sealing structure of hub bearing

Technical Field

The utility model relates to a sealing structure of a hub bearing.

Background

The existing pick-up hub bearing sealing mechanism is similar to a hub bearing structure of a passenger car, but has the following problems: compared with a passenger car, the pickup truck has higher bearing capacity requirement and often gets out of road conditions such as muddy roads; for both aspects, there are problems as follows:

1) The bearing capacity is high, the internal temperature of the hub bearing is high when the hub bearing is operated, and grease leakage in the hub bearing is easy to occur;

2) When the wheel hub runs on a muddy road, the wheel hub bearing is soaked in muddy water, so that muddy water is easy to enter in the running process of the wheel hub bearing;

therefore, the pick-up hub bearing has the problem of poor sealing structure and poor sealing performance of the sealing structure.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a sealing structure of a hub bearing.

In order to achieve the above-mentioned purpose, the utility model provides a sealing structure of a hub bearing, comprising a hub bearing, the hub bearing comprises a bearing inner flange, a bearing outer flange, two rows of balls arranged between the bearing inner flange and the bearing outer flange, an outer channel and an inner channel are arranged between the bearing outer flange and the two rows of balls, the outer channel and the inner channel are mutually communicated, the hub bearing is provided with a first sealing part at the corresponding opening of the outer channel, the hub bearing is provided with a second sealing part at the corresponding opening of the inner channel, the first sealing part and the second sealing part are respectively provided with a sealing mechanism for sealing the gap between the bearing inner flange and the bearing outer flange, the sealing mechanism comprises a first framework corresponding to the inner wall of the bearing outer flange and a second framework corresponding to the bearing inner flange, sealing pieces are arranged between the first framework and the second framework, the sealing pieces form a labyrinth channel, the sealing pieces corresponding to the second framework are matched with spring rings, and the sealing pieces are pressed on the second framework towards the axial lead direction of the hub bearing.

The beneficial effects of the utility model are as follows: according to the utility model, the gap processes at the two ends of the hub bearing are respectively sealed through the first sealing part and the second sealing part, impurities can be effectively prevented from entering the hub bearing by the first sealing part and the second sealing part, so that the sealing performance of the combined sealing mechanism is optimized, the sealing mechanism arranged on the first sealing part and the second sealing part comprises the labyrinth channel, the labyrinth channel enables impurities in the labyrinth channel to be discharged under the action of centrifugal force in the rotating process of the hub bearing, so that water or impurities can be effectively prevented from entering the hub bearing, the sealing performance is improved, and the sealing piece corresponding to the second framework is pressed on the second framework by the spring ring by the annular tightening of the sealing piece by the spring ring, so that the abrasion after the service time of the sealing piece is long, the deformation of the spring ring can be still pressed, the service life is prolonged, and the sealing performance is optimized.

Further, one end of the first framework corresponding to the first sealing part extends to a position close to the outer peripheral wall of the bearing outer flange, a sealing piece arranged on the first framework is provided with a first sealing lip which is abutted against the bearing inner flange, and the first sealing lip forms sealing between the bearing outer flange and the bearing inner flange.

Through adopting above-mentioned technical scheme, the clearance between the outer flange of bearing and the bearing inner flange of first sealing portion position is shielded to the first lip that first sealing portion corresponds first skeleton setting, has increased the sealed space of first sealing portion position, can seal the bearing inside in the more outside position of first sealing portion, further improves the sealed scope of wheel hub bearing.

Further, an embedded groove for installing a spring ring is formed in the position, close to the second framework, of the sealing piece, the spring ring is partially arranged in the embedded groove and provides a holding force towards the axis of the hub bearing for the sealing piece, support legs are arranged on one side, close to the rolling bodies, of the sealing piece in an extending mode, and one ends of the support legs are abutted to the second framework.

Through adopting above-mentioned technical scheme, the embedding groove that the sealing member is close to second skeleton department setting can stabilize the mounted position of spring ring to improve the spring ring and to the effect of hugging closely of sealing member, and the stabilizer blade that one side that is close to the rolling element of sealing member set up can prevent that the spring ring can not slide towards the rolling element direction in compressing tightly the in-process to the sealing member, thereby guarantees the sealing member to the inside leakproofness of wheel hub bearing.

Further, the sealing piece is sleeved on the first framework and is provided with a second sealing lip and a third sealing lip which are protruding towards the direction of the second framework, the second sealing lip is close to the embedded groove compared with the third sealing lip and is in interference fit with the second framework, the third sealing lip is in clearance fit with the second framework, one end, close to the outer flange of the bearing, of the second framework is bent to form a first labyrinth channel in cooperation with the second sealing lip and the third sealing lip, and the second sealing lip and the sealing piece at the position of the embedded groove form a first sealing space.

Through adopting above-mentioned technical scheme, second seal lip and second skeleton interference fit are fixed firm, and second seal lip one side is first labyrinth passageway, and the opposite side is first sealed space, improves sealed effect, has simplified the structure that constitutes the labyrinth passageway for second seal lip, the cooperation of third seal lip form first labyrinth passageway, has reduced manufacturing cost.

Further, an interference groove for installing the first sealing lip is formed in the bearing inner flange, one end of the first sealing lip is in interference fit with the interference groove to form a second sealing space, and the second sealing space seals the first sealing portion with the outside.

Through adopting above-mentioned technical scheme, the setting of interference groove can make sealing member convenient at installation in-process assembly to interference groove and first seal lip interference fit are less likely to break away from in first seal lip and plane interference fit, thereby improve assembly effect and sealed effect, in first sealing position, the second seal space is closer to the opening than first seal space, thereby has carried out secondary seal, has carried out the sealed guarantee in first seal space, has improved the leakproofness.

Further, the first sealing lip and the bent end of the second framework form a second labyrinth passage, and the second labyrinth passage is communicated with the first labyrinth passage.

By adopting the technical scheme, the length of the labyrinth sealing channel is increased by the arrangement that the second labyrinth channel is communicated with the first labyrinth channel, and the performance of the sealing mechanism is optimized.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present utility model;

FIG. 2 is an enlarged partial view of portion A of FIG. 1;

fig. 3 is a schematic structural view of a second sealing portion according to an embodiment of the present utility model.

Detailed Description

Embodiments of the utility model are further described below with reference to the accompanying drawings: as shown in fig. 1-3, the sealing structure of the hub bearing comprises a hub bearing, the hub bearing comprises a bearing inner flange 1, a bearing outer flange 2 and two rows of balls arranged between the bearing inner flange 1 and the bearing outer flange 2, an outer channel 3 and an inner channel 4 are arranged between the bearing outer flange 2 and the two rows of balls, the outer channel 3 and the inner channel 4 are mutually communicated, a first sealing part 5 is arranged at a position, corresponding to an opening, of the outer channel 3, a second sealing part 6 is arranged at a position, corresponding to the opening, of the inner channel 4, of the hub bearing, the first sealing part 5 and the second sealing part 6 are respectively provided with a sealing mechanism 7 for sealing a gap between the bearing inner flange 1 and the bearing outer flange 2, the sealing mechanism 7 comprises a first framework 8 corresponding to the inner wall of the bearing outer flange 2 and a second framework 9 corresponding to be arranged on the bearing inner flange 1, sealing parts 10 are arranged between the first framework 8 and the second framework 9, the sealing parts 10 form a labyrinth channel, sealing parts 10 corresponding to the sealing parts 10 are arranged at the positions corresponding to the opening positions of the outer channel 3, sealing parts 11 are correspondingly arranged at the sealing parts 10, and the sealing parts are correspondingly arranged at the sealing parts 11 and are correspondingly arranged at the sealing parts and are correspondingly arranged at the sealing mechanism 7, and pressing rings 11 faces the sealing parts and the sealing parts towards the spring axis direction of the second framework.

One end of the first framework 8 corresponding to the first sealing part 5 extends to a position close to the outer peripheral wall of the bearing outer flange 2, a sealing piece 10 arranged on the first framework 8 is provided with a first sealing lip 12 abutted against the bearing inner flange 1, and the first sealing lip 12 forms a seal between the bearing outer flange 2 and the bearing inner flange 1.

The sealing element 10 is provided with an embedded groove 13 for installing a spring ring 11 near the second framework 9, the spring ring 11 is partially arranged in the embedded groove 13 and provides holding force for the sealing element 10 towards the axis of the hub bearing, one side of the sealing element 10 near the rolling body is provided with a supporting leg 14 in an extending mode, and one end of the supporting leg 14 is abutted to the second framework 9.

The sealing element 10 is sleeved on the first framework 8 and is provided with a second sealing lip 15 and a third sealing lip 16 which are protruded towards the direction of the second framework 9, the second sealing lip 15 is close to the embedded groove 13 and in interference fit with the second framework 9 compared with the third sealing lip 16, the third sealing lip 16 is in clearance fit with the second framework 9, one end, close to the bearing outer flange 2, of the second framework 9 is bent to be matched with the second sealing lip 15 and the third sealing lip 16 to form a first labyrinth channel 17, and the second sealing lip 15 and the sealing element 10 at the position of the embedded groove 13 form a first sealing space 18.

The bearing inner flange 1 is provided with an interference groove 19 for installing the first sealing lip 12, one end of the first sealing lip 12 is in interference fit with the interference groove 19 to form a second sealing space 20, and the second sealing space 20 seals the first sealing part 5 with the outside.

The first sealing lip 12 and the bent end of the second framework 9 form a second labyrinth passage 21, and the second labyrinth passage 21 is communicated with the first labyrinth passage 17.

The above embodiment is only one of the preferred embodiments of the present utility model, and common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are included in the scope of the present utility model.

Claims

1. The utility model provides a hub bearing's seal structure, includes hub bearing, hub bearing includes flange, bearing outer flange, sets up two rows of balls between flange and bearing outer flange in the bearing, be provided with outside channel, inboard channel between the bearing outer flange and the two rows of balls, communicate each other between outside channel and the inboard channel, its characterized in that: the hub bearing is provided with a first sealing part at the opening corresponding to the outer side channel, the hub bearing is provided with a second sealing part at the opening corresponding to the inner side channel, the first sealing part and the second sealing part are respectively provided with a sealing mechanism for sealing a gap between an inner flange of the bearing and an outer flange of the bearing, the sealing mechanism comprises a first framework which corresponds to the inner wall of the outer flange of the bearing and is tightly fitted, a second framework which corresponds to the inner flange of the bearing and is arranged on the inner flange of the bearing, a sealing element is arranged between the first framework and the second framework, the sealing element forms a labyrinth channel, a spring ring is correspondingly arranged on the second framework in a matched manner, and the spring ring tightly presses the sealing element on the second framework towards the axial lead direction of the hub bearing.

2. The hub bearing sealing structure according to claim 1, wherein: one end of the first framework corresponding to the first sealing part extends to a position close to the outer peripheral wall of the bearing outer flange, a sealing piece arranged on the first framework is provided with a first sealing lip which is abutted against the bearing inner flange, and the first sealing lip forms sealing between the bearing outer flange and the bearing inner flange.

3. The hub bearing sealing structure according to claim 2, wherein: the sealing element is provided with an embedded groove for installing a spring ring near the second framework, the spring ring is partially arranged in the embedded groove and provides holding force for the sealing element towards the axial lead of the hub bearing, one side of the sealing element near the rolling body is provided with supporting feet in an extending mode, and one end of each supporting foot is abutted to the second framework.

4. A hub bearing sealing arrangement according to claim 3, wherein: the sealing piece is sleeved on the first framework and is provided with a second sealing lip and a third sealing lip which are protruding towards the direction of the second framework, the second sealing lip is close to the embedded groove compared with the third sealing lip and is in interference fit with the second framework, the third sealing lip is in clearance fit with the second framework, one end, close to the outer flange of the bearing, of the second framework is bent to form a first labyrinth channel in cooperation with the second sealing lip and the third sealing lip, and the second sealing lip and the sealing piece at the position of the embedded groove form a first sealing space.

5. The hub bearing sealing structure according to claim 2, wherein: the bearing inner flange is provided with an interference groove for installing the first sealing lip corresponding to the first sealing lip, one end of the first sealing lip is in interference fit with the interference groove to form a second sealing space, and the second sealing space seals the first sealing part with the outside.

6. A hub bearing sealing arrangement according to claim 3, wherein: the first sealing lip and the bent end of the second framework form a second labyrinth passage, and the second labyrinth passage is communicated with the first labyrinth passage.