CN213117174U

CN213117174U - Rear axle semi-axis bearing seal structure

Info

Publication number: CN213117174U
Application number: CN202021855699.7U
Authority: CN
Inventors: 张书健
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-05-04
Anticipated expiration: 2030-08-31

Abstract

The utility model relates to a rear axle semi-axis bearing seal structure, which comprises an axle housing flange plate, a semi-axis bearing, a dust cover and a semi-axis; the right end of the axle housing flange plate is connected with a half shaft bearing seat through a bolt, a half shaft bearing is pressed in the half shaft bearing seat, the half shaft is fixed through the half shaft bearing, the end part of the half shaft bearing is connected with a half shaft flange, and a dust cover is pressed on the inner side surface of the half shaft flange through a wheel bolt; the outer end of the half shaft bearing seat is provided with an outer sealing ring in a pressing mode, the outer sealing ring is in interference fit with the half shaft, the outer sealing ring extends outwards and forms a sealing fit relation with the dust cover, and sealing of the half shaft bearing is achieved. The outer seal circle can effectively avoid muddy water to get into bearing installation die cavity, and the dust cover can avoid the stone to get into the sealing washer working face, and in addition, the dust cover can rotate along with the rotation of semi-axis flange, gets rid of the dirt (like the stone) and takes off, prevents to pile up, protects the outer seal circle.

Description

Rear axle semi-axis bearing seal structure

Technical Field

The utility model relates to an automobile chassis transmission system, concretely relates to semi-axis bearing seal structure.

Background

As shown in fig. 8, the existing rear axle half shaft bearing sealing structure comprises an axle housing connecting disc 1, a dust cover 4, a half shaft 5 and a half shaft bearing 7, wherein the half shaft bearing 7 is installed in the axle housing connecting disc 1, the dust cover 4 is connected with the axle housing connecting disc 1, the half shaft 5 is fixed through the half shaft bearing 7 and penetrates out of the dust cover 4, and a gap exists between the dust cover 4 and the half shaft 5. The prior structure has the following problems: the half shaft bearing 7 is only dustproof and sealed by the dust cover 4, a gap is reserved between the dust cover 4 and the half shaft 5, large stones can only be prevented from entering a working channel of the half shaft bearing 7, silt, dust, oil stains and the like are directly in direct contact with the half shaft bearing 7 through the gap between the dust cover 4 and the half shaft 5 in the long-term running process of a vehicle, the half shaft bearing 7 is damaged or even destroyed, and the service life is greatly reduced.

Disclosure of Invention

The utility model aims at providing a rear axle semi-axis bearing seal structure, the technical problem of solution: the existing rear axle half shaft bearing sealing structure is dustproof and poor in sealing effect.

In order to solve the technical problem, the utility model discloses a following technical scheme: a rear axle half shaft bearing sealing structure comprises an axle housing flange plate, a half shaft bearing, a dust cover and a half shaft; the right end of the axle housing flange plate is connected with a half shaft bearing seat through a bolt, a half shaft bearing is pressed in the half shaft bearing seat, the half shaft is fixed through the half shaft bearing, the end part of the half shaft bearing is connected with a half shaft flange, and the dust cover is pressed on the inner side surface of the half shaft flange through a wheel bolt; the outer end of the half shaft bearing seat is provided with an outer sealing ring in a pressing mode, the outer sealing ring is in interference fit with the half shaft, the outer sealing ring extends outwards and forms a sealing fit relation with the dust cover, and sealing of the half shaft bearing is achieved.

As a further improvement of the utility model, the outer sealing ring is provided with an inner sealing lip and an outer sealing lip, the inner sealing lip is designed into a double lip shape and is in interference fit with the half shaft to form double protection; the outer side sealing lip extends upwards after extending outwards to form a dust blocking channel structure, and forms a sealing matching relation with the dust cover.

As right the utility model discloses a further improvement, the dust cover is extended by the inside parcel arch of junction to downwardly extending forms a sealed cooperation relation in the dust channel structure of outer seal ring.

Through adopting above-mentioned technical scheme, the utility model discloses the beneficial technological effect that can reach states as follows: the outer sealing ring can effectively prevent muddy water splashed when a vehicle runs, external oil stain dust or particles generated by braking from entering the half shaft bearing installation cavity, and can realize sealing and effective protection on the half shaft bearing; the dust cover can effectively avoid entering outer seal ring working face such as the granule dust that stone, big mud gravel, braking produced, prolongs the outer seal ring life-span greatly, and in addition, the dust cover is installed at semi-axis flange medial surface, and through the centrifugal force when rotating together with the semi-axis, dirt such as muddy water that can be timely will block, stone get rid of and take off, prevent to pile up, protection outer seal ring.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a sectional view of the structure of the present invention;

FIG. 3 is an enlarged partial cross-sectional view of the outer seal ring and dust boot at the engagement position;

FIG. 4 is a front view of the dust cap structure;

FIG. 5 is a side view of a dust cover arrangement;

FIG. 6 is a front view of an outer seal ring structure;

FIG. 7 is a side view of the outer seal ring structure;

FIG. 8 is a cross-sectional view of a prior art rear axle half bearing seal structure;

in the figure: 1, an axle housing connecting plate; 2-half shaft bearing seat; 3, an outer sealing ring; 4, a dustproof cover; 5-half shaft; 6-wheel bolt; 7-half shaft bearings; 31-inner side sealing lip; 32-outer sealing lip; 51-axle flange.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 7, a rear axle half shaft bearing sealing structure comprises an axle housing flange plate 1, a half shaft bearing 7, a dust cover 4 and a half shaft 5; the right end of the axle housing flange plate 1 is connected with a half shaft bearing seat 2 through a bolt, a half shaft bearing 7 is pressed in the half shaft bearing seat 2, a half shaft 5 is fixed through the half shaft bearing 7, the end part of the half shaft bearing is connected with a half shaft flange 51, and a dust cover 4 is pressed on the inner side surface of the half shaft flange 51 through a wheel bolt 6; the outer end of the half shaft bearing seat 2 is provided with an outer sealing ring 3 in a pressing mode, the outer sealing ring 3 is in interference fit with the half shaft 5, the outer sealing ring 3 extends outwards and forms a sealing fit relation with the dust cover 4, and sealing of the half shaft bearing 7 is achieved.

In the embodiment, the outer sealing ring 3 has an inner sealing lip 31 and an outer sealing lip 32, the inner sealing lip 31 is designed to be a double lip shape, and is in interference fit with the half shaft 5 to form double protection; the outboard sealing lip 32 extends outwardly and then upwardly to form a dust retaining channel structure in sealing engagement with the dust cap 4.

In this embodiment, the dust cover 4 extends from the joint to the inner wrapping protrusion and extends downward into the dust blocking channel structure of the outer sealing ring 3 to form a sealing fit relationship.

The outer sealing ring 3 can effectively prevent muddy water splashed when a vehicle runs, external greasy dirt and dust or particles generated by braking from entering the installation cavity of the half shaft bearing 7, and can realize sealing and effective protection of the half shaft bearing 7; dust cover 4 can effectively avoid entering outer seal ring 3 working faces such as the granule dust that stone, big mud gravel, braking produced, prolongs outer seal ring 3 life-span greatly, and in addition, dust cover 4 is installed at semi-axis flange 51 medial surface, and through the centrifugal force when rotating together with semi-axis 5, dirt such as muddy water, stone that can be timely will block gets rid of and takes off, prevents to pile up, protection outer seal ring 3.

Claims

1. A rear axle half shaft bearing sealing structure comprises an axle housing flange plate (1), a half shaft bearing (7), a dust cover (4) and a half shaft (5); the right end of the axle housing flange plate (1) is connected with a half shaft bearing seat (2) through a bolt, a half shaft bearing (7) is pressed in the half shaft bearing seat (2), the half shaft (5) is fixed through the half shaft bearing (7), the end part of the half shaft bearing is connected with a half shaft flange (51), and the dust cover (4) is pressed on the inner side surface of the half shaft flange (51) through a wheel bolt (6); the sealing device is characterized in that an outer sealing ring (3) is arranged at the outer end of the half shaft bearing seat (2) in a pressing mode, the outer sealing ring (3) is in interference fit with a half shaft (5), the outer sealing ring (3) extends outwards and forms a sealing fit relation with a dust cover (4), and sealing of the half shaft bearing (7) is achieved.

2. The rear axle half shaft bearing seal structure according to claim 1, characterized in that the outer sealing ring (3) has an inner sealing lip (31) and an outer sealing lip (32), the inner sealing lip (31) is designed to be double-lip-shaped and is in interference fit with the half shaft (5) to form double protection; the outer side sealing lip (32) extends outwards and then extends upwards to form a dust blocking channel structure, and forms a sealing matching relation with the dust cover (4).

3. The rear axle half shaft bearing sealing structure according to claim 2, characterized in that the dust cover (4) extends from the joint to the inner wrapping projection and extends downwards to the dust blocking channel structure of the outer sealing ring (3) to form a sealing fit relationship.