CN212775569U

CN212775569U - Sealing structure of hub bearing

Info

Publication number: CN212775569U
Application number: CN202020903146.8U
Authority: CN
Inventors: 戴煜; 林春明; 史延平
Original assignee: Jiaxing Taite Rubber Co ltd
Current assignee: Jiamusi Jiti Agricultural Machinery Manufacturing Co.,Ltd.
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-03-23
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a seal structure of wheel hub bearing, include: the wheel hub bearing is arranged in a bearing seat, one side of the bearing seat is fixedly connected with a bearing cover, and the bearing cover is provided with an installation groove; an oil seal is arranged in the mounting groove and can be abutted against the outer peripheral wall of the wheel shaft; the bearing cover is fixedly connected with the bearing seat after being fixed with the oil seal. The oil seal can be installed in the bearing cover without a special jig, the assembly is simple, the assembly time can be shortened, and the cost is reduced.

Description

Sealing structure of hub bearing

Technical Field

The utility model relates to a seal structure of wheel hub bearing.

Background

The role of the oil seal in the hub bearing is generally to isolate the components of the transmission that require lubrication from the external environment so that the lubricating oil does not leak. At present, an oil seal is generally directly arranged in an inner hole of a bearing seat to ensure the sealing of the bearing seat and a wheel shaft. However, when the oil is injected into the inner cavity of the hub bearing, the inner cavity of the hub bearing is subjected to the pressure of the oil, which may cause the oil seal to be separated from the bearing seat of the hub bearing, thereby causing leakage of the lubricating oil. In addition, the oil blanket sets up in the hole of bearing frame, needs dedicated tool just can put the oil blanket in place with the bearing frame installation for the assembly is more difficult. When needing to maintain or dismantling the wheel hub bearing, the bearing can be touch to the oil blanket, leads to the oil blanket damaged for the oil blanket can not used repeatedly.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect in the prior art, the embodiment of the utility model provides a sealing structure of wheel hub bearing can solve above-mentioned technical problem. This seal structure of wheel hub bearing includes:

the wheel shaft is arranged on the wheel body,

and the hub bearing is sleeved on the wheel shaft and is arranged in the bearing seat, one side of the bearing seat is fixedly connected with a bearing cover, the bearing cover is provided with an installation groove, an oil seal is arranged in the installation groove, and the oil seal is inconsistent with the peripheral wall of the wheel shaft.

Further, the oil seal comprises a body portion, an inner lip and an outer lip, the inner lip extends from the body portion to the bearing seat and abuts against the wheel shaft, and the outer lip extends from the body portion to the direction away from the inner lip and abuts against the wheel shaft.

Further, the inner lip has a thickness greater than the outer lip.

Further, the bearing cover is provided with a through hole for the wheel shaft to penetrate through, and the mounting groove is connected with the through hole.

Furthermore, an annular groove is formed in the periphery of the bearing cover to form a step portion, the bearing cover is abutted to the bearing seat through the step portion, the step portion comprises a side wall for limiting the bearing seat to move along the radial direction and a step surface for limiting the bearing seat to move along the axial direction, and the side wall extends into an inner hole of the bearing seat.

Further, a gasket is arranged between the hub bearing and the bearing cover.

Further, there is a gap between the washer and the oil seal, which can prevent the washer from rubbing against the inner end face of the bearing cap, thereby causing unnecessary wear.

Furthermore, the end face of the bearing seat is provided with an O-shaped sealing ring, and the O-shaped sealing ring is abutted to the step face of the bearing cover.

Further, the step surface of the bearing cover is fixedly connected with the bearing seat through bolts.

Further, the hub bearing adopts a conical bearing.

The utility model has the advantages as follows:

1. the oil seal can be installed in the bearing cover without other tools, so that the installation is more convenient and quicker, the assembly time can be shortened, and the cost is reduced.

2. Through will the oil blanket sets up in the mounting groove of bearing cap, the bearing cap with bearing frame fixed connection can effectively prevent the oil blanket side is moved when the oiling, thereby avoids the oil blanket deviates from thereby cause the oil leak of the cavity of bearing frame.

3. The oil seal is prevented from being pressed by the bearing cap by a gasket to cause damage to the oil seal.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of a seal structure in an embodiment of the present invention;

fig. 2 is a cross-sectional view of a sealing structure in an embodiment of the present invention;

fig. 3 is a schematic diagram of an oil seal in an embodiment of the present invention.

Reference numerals of the above figures: a wheel shaft-1; a first end-11; a second end-12; a bearing seat-2; an inner hole-21; a bearing cover-3; a through-hole-31; mounting groove-32; a step-33; a sidewall-331; a step surface-332; oil seal-4; a body portion-41; an inner lip-42; an outer lip-43; a hub bearing-5; a washer-6; o-shaped sealing ring-7; screw-8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

To achieve the above object, the present invention provides a sealing structure of a hub bearing, including as shown in fig. 1:

a wheel axle 1, said wheel axle 1 having opposite first and

second ends

11, 12;

the bearing seat 2 is sleeved at the first end 11 of the wheel shaft 1;

a bearing cover 3, wherein the bearing cover 3 is provided with a through hole 31 for the wheel shaft 1 to pass through and an installation groove 32 which is coaxial with the through hole 31;

an oil seal 4, wherein the oil seal 4 is installed in the installation groove 32 of the bearing cover 3, and the oil seal 4 can be abutted against the outer peripheral wall of the wheel shaft 1;

and the wheel hub bearing 5 is sleeved on the wheel shaft 1 and is arranged in the bearing seat 2.

The bearing cover 3 is fixedly connected with the bearing seat 2 after being fixed with the oil seal 4.

In the present embodiment, the oil seal 4 is fixedly provided in the bearing cover 3, not in the bearing housing 2. Will oil blanket 4 sets up need special tool to install in place when in the bearing frame 2, and will oil blanket 4 sets up in the time of in the bearing cap 3, need not other instruments just can install in place for install convenient and fast more. During installation, the oil seal 4 is only required to be pressed into the bearing cover 3 in advance, and then the bearing cover 3 is inserted into the bearing seat 2 from the second end 12 of the wheel axle 1 to be fixedly connected with the bearing seat. Therefore, the time for assembling can be shortened, and the cost is reduced.

Specifically, as shown in fig. 2 and 3, the oil seal 4 includes a main body 41, an inner lip 42, and an outer lip 43, the inner lip 42 extends from the main body 41 toward the bearing housing 2 and contacts the wheel axle 1, and the outer lip 43 extends from the main body 41 away from the inner lip 42 and contacts the wheel axle 1. The inner lip 42 is used for preventing oil from leaking outwards, and the outer lip 43 is used for preventing external pollutants such as muddy water, dust and the like from entering the inner cavity of the hub bearing. The oil seal 4 in this embodiment has an inner and outer lip structure to seal the wheel axle 1, so that the sealing performance is more excellent.

Preferably, the inner lip 42 is thicker than the outer lip 43.

As shown in fig. 2, the mounting groove 32 is connected to the through hole 31, and the oil seal 4 is disposed in the mounting groove 32. The mounting groove 32 provides a receiving space for the oil seal 4, which facilitates the mounting of the oil seal 4.

When the oil seal 4 is installed in the bearing seat 2 and oil is injected into the inner cavity of the hub bearing 5, the pressure of lubricating oil on the inner cavity of the hub bearing 5 can cause the oil seal 4 to be separated from the bearing seat 2 of the hub bearing 5, so that the lubricating oil is leaked outwards. In this embodiment, the oil seal 4 is disposed in the mounting groove 32 of the bearing cap 3, and the bearing cap 3 is fixedly connected to the bearing seat 2, so that the oil seal 4 can be effectively prevented from moving laterally during oil injection, and the oil seal 4 is prevented from escaping from the cavity of the bearing seat 2, thereby preventing oil leakage.

In the present embodiment, the hub bearing 5 is a conical bearing. A gasket 6 is arranged between the conical bearing and the bearing cover 3. When the conical bearing is replaced, the bearing seat 2 and the bearing cover 3 need to be moved out of the wheel shaft 1 together for replacement, and the gasket 6 prevents the oil seal 4 from being damaged due to the fact that the oil seal 4 is pressed by the bearing cover 3.

A gap is formed between the washer 6 and the oil seal 4, and the washer 6 is prevented from rubbing against the inner end surface of the bearing cap 3, thereby causing unnecessary wear.

More preferably, in order to facilitate the positioning and installation of the bearing cap 3 and the bearing seat 2, an annular groove is formed on the outer periphery of the bearing cap 3 to form a step portion 33, and the bearing cap 3 abuts against the bearing seat 2 through the step portion 33. The step part 33 includes a side wall 331 for restricting movement of the bearing housing 2 in the radial direction, and a step surface 332 for restricting movement of the bearing housing 2 in the axial direction. The outer diameter of the side wall 331 is the same as the diameter of the inner hole 21 of the bearing seat 2, the side wall 331 extends into the inner hole 21 of the bearing seat 2, and the step surface 332 is fixedly connected with the bearing seat 2 through a bolt 8. The step 33 can position the bearing cap 3 more quickly and can restrict the movement of the bearing housing 2.

The end face of the bearing seat 2 is provided with an O-shaped sealing ring 7, and the O-shaped sealing ring 7 is abutted to the step surface 332 of the bearing cover 3. The O-ring 7 is disposed inside the screw 8. The O-shaped sealing ring 7 can play a good end face sealing role, and the sealing performance is greatly improved.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A seal structure of a hub bearing, comprising:

the wheel shaft is arranged on the wheel body,

2. The seal structure of a hub bearing according to claim 1, wherein the oil seal includes a body portion, an inner lip extending from the body portion in a direction toward the bearing seat and abutting the wheel shaft, and an outer lip extending from the body portion in a direction away from the inner lip and abutting the wheel shaft.

3. The seal structure of a hub bearing according to claim 2, wherein the inner lip has a thickness greater than the outer lip.

4. The seal structure of a hub bearing according to claim 3, wherein the bearing cover is provided with a through hole through which the wheel shaft passes, and the mounting groove is connected to the through hole.

5. The sealing structure of a hub bearing according to claim 4, wherein an annular groove is formed in an outer periphery of the bearing cap to form a step portion, the bearing cap abuts against the bearing seat through the step portion, the step portion includes a side wall that limits the bearing seat from moving in a radial direction and a step surface that limits the bearing seat from moving in an axial direction, and the side wall extends into an inner hole of the bearing seat.

6. The seal structure of a hub bearing according to claim 4, wherein a gasket is provided between the hub bearing and the bearing cap.

7. The seal structure of a hub bearing according to claim 6, wherein a clearance exists between the washer and the oil seal, the clearance being capable of preventing the washer from rubbing against the inner end face of the bearing cap, thereby causing unnecessary wear.

8. The sealing structure of a hub bearing according to claim 5, wherein an O-shaped sealing ring is arranged on the end face of the bearing seat, and the O-shaped sealing ring is abutted against the step face of the bearing cover.

9. The seal structure of a hub bearing according to claim 8, wherein the step surface of the bearing cover is fixedly connected to the bearing housing by a bolt.

10. The seal structure of a hub bearing according to claim 6, wherein the hub bearing is a conical bearing.