CN215890816U - Sealing assembly of hub bearing - Google Patents
Sealing assembly of hub bearing Download PDFInfo
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- CN215890816U CN215890816U CN202121959746.7U CN202121959746U CN215890816U CN 215890816 U CN215890816 U CN 215890816U CN 202121959746 U CN202121959746 U CN 202121959746U CN 215890816 U CN215890816 U CN 215890816U
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- hub bearing
- lip
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- seal
- sealing lip
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Abstract
The utility model discloses a sealing assembly of a hub bearing, which comprises a sealing ring, an outer framework and an inner framework, wherein the outer framework and the inner framework are mutually buckled to form a cavity, the outer framework comprises a first outer framework and a second outer framework, the sealing ring comprises a connecting part coated on the inner framework, a first sealing lip abutted against the first outer framework and a second sealing lip abutted against the second outer framework, the second sealing lip is provided with an air hole, and the air hole is formed in one end, far away from the connecting part, of the second sealing lip. A gap exists between the first sealing lip and the second sealing lip, the gap can be used as a buffer space, when the hub bearing runs at a high speed, the air holes can balance the pressure inside the gap and the hub bearing to a certain extent, the pressure inside the hub bearing is prevented from being too high, meanwhile, lubricating grease overflowing from the inside of the hub bearing due to the fact that the pressure of the hub bearing is too high can be collected in the gap, and the overflowing lubricating grease can flow back to the inside of the hub bearing through the air holes.
Description
Technical Field
The utility model belongs to the technical field of bearings, and particularly relates to a sealing assembly of a hub bearing.
Background
The hub bearing is one of key parts of an automobile, generally comprises an inner ring, an outer ring, a rolling body and a sealing assembly, is mainly used for bearing weight and providing accurate guide for the rotation of a hub, is a very important part on an axle, and has higher requirements on the hub bearing in the market along with the development of the automobile industry, the performance of the hub bearing is closely related to the sealing assembly, and the sealing failure can cause the bearing failure and finally cause the automobile failure.
The automobile needs to cope with various weather when actually driving, especially in humid weather, muddy water can be splashed when the automobile drives, the service life of the hub bearing can be seriously influenced if the muddy water enters the interior of the hub bearing, the existing sealing assembly is usually in contact sealing, the contact sealing enables the existing hub bearing to have good waterproof performance, air tightness and the like, but when the hub bearing runs at a high speed, the internal pressure of the hub bearing is increased, lubricating grease in the hub bearing is easily extruded, the early failure of the hub bearing due to lack of the lubricating grease is caused, the problems of abnormal sound, unsmooth running and the like of the automobile are caused, and the service life of the hub bearing is also seriously influenced.
Disclosure of Invention
To overcome the disadvantages of the prior art, the present invention provides a seal assembly that reduces grease extrusion from the interior of a hub bearing.
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a sealing assembly of wheel hub bearing, includes sealing washer, outer skeleton and inner frame, the mutual lock vacuole formation of outer skeleton and inner frame, outer skeleton include along the radial first outer skeleton of extending of inner circle and with the interior second outer skeleton of fixed of following of first outer skeleton, the second outer skeleton along the axial extension of inner circle and with inner circle interference fit, the sealing washer includes the connecting portion of cladding on the inner frame and sets up the seal lip in the cavity, the seal lip includes the first seal lip of butt on first outer skeleton and the second seal lip of butt on the second outer skeleton, be equipped with the bleeder vent on the second seal lip, the one end of connecting portion is kept away from at the second seal lip to the bleeder vent setting.
By adopting the scheme, the gap exists between the first sealing lip and the second sealing lip, the gap can be used as a buffer space, when the hub bearing runs at a high speed, the air holes can balance the pressure inside the gap and the hub bearing to a certain extent, the pressure inside the hub bearing is prevented from being too high, meanwhile, lubricating grease overflowing from the inside of the hub bearing due to the fact that the pressure of the hub bearing is too high can be collected in the gap, and the overflowing lubricating grease can flow back to the inside of the hub bearing through the air holes.
As a further arrangement of the utility model, the air holes are semi-circular holes, and the radius of the air holes is greater than or equal to 0.5 mm.
By adopting the scheme, the deformation degree of the air holes in the process of balancing the internal and external air pressure can be reduced due to the shape of the air holes, so that the service life of the sealing assembly is longer, and the radius of the air holes ensures the ventilation effect of the air holes.
As a further arrangement of the utility model, the number of the air holes is at least two, and the air holes are rotationally symmetrical along the axis of the sealing ring.
By adopting the scheme, the ventilation effect can be better realized.
As a further arrangement of the utility model, an inclined plane is arranged at the joint of the first outer framework and the second outer framework, and the inclined plane is arranged in the cavity.
By adopting the scheme, the lubricating grease between the first sealing lip and the second sealing lip can conveniently flow back to the inside of the hub bearing through the air holes on the inclined surface.
As a further provision of the utility model, the thickness of the first sealing lip at the end close to the connecting portion is greater than the thickness at the end remote from the connecting portion.
By adopting the scheme, the first sealing lip keeps the shape.
As a further arrangement of the present invention, the first seal lip includes a primary seal lip and a secondary seal lip disposed at an end remote from the connection portion, and an included angle between the primary seal lip and the secondary seal lip is less than 90 °.
Adopt above-mentioned scheme, make the better butt of first lip seal on first exoskeleton, prevent that the wheel hub bearing when high-speed operation, the lubricating grease between first lip seal and the second lip seal is extruded from first lip seal.
In a further aspect of the present invention, a third seal lip having a shape corresponding to the first seal lip is disposed on a side of the first seal lip away from the second seal lip, one end of the third seal lip is fixedly connected to the connecting portion, and the other end of the third seal lip abuts against the first outer frame, and at least one third seal lip is disposed.
By adopting the scheme, the sealing effect of the sealing assembly is ensured.
The utility model is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an actual implementation of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention;
FIG. 3 is a schematic view of a vent according to an embodiment of the present invention.
The sealing ring comprises a sealing ring 1, a connecting part 11, a first sealing lip 12, a main sealing lip 121, an auxiliary sealing lip 122, a second sealing lip 13, an air vent 131, a third sealing lip 14, an outer framework 2, a first outer framework 21, a second outer framework 22, an inclined surface 23 and an inner framework 3.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In the description of the present invention, it should be noted that, unless otherwise specified, the orientations or positional relationships indicated in the description as terms of "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are 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 referred devices or elements 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," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Specific embodiments of the utility model are shown in the drawings.
The utility model provides a sealing assembly of wheel hub bearing, including sealing washer 1, outer skeleton 2 and inner frame 3, outer skeleton 2 and the mutual lock vacuole formation of inner frame 3, outer skeleton 2 includes the first outer skeleton 212 of the radial extension of edge inner circle and the second outer skeleton 222 of interior edge fixed with first outer skeleton 212, second outer skeleton 222 along the axial extension of inner circle and with inner circle interference fit, sealing washer 1 is including the cladding connecting portion 11 on inner frame 3, the first seal lip 12 of butt on first outer skeleton 212 and the second seal lip 13 of butt on second outer skeleton 222, be equipped with bleeder vent 131 on the second seal lip 13, bleeder vent 131 sets up the one end of keeping away from connecting portion 11 at second seal lip 13. A gap exists between the first sealing lip 12 and the second sealing lip 13, the gap can be used as a buffer space, when the hub bearing runs at a high speed, the air holes 131 can balance the pressure inside the gap and the hub bearing to a certain extent, the pressure inside the hub bearing is prevented from being too high, meanwhile, lubricating grease overflowing from the inside of the hub bearing due to the fact that the pressure of the hub bearing is too high can be collected in the gap, and the overflowing lubricating grease can flow back to the inside of the hub bearing through the air holes 131.
The air holes 131 are semicircular holes, and the radius of the air holes 131 is larger than or equal to 0.5 mm. The shape of the air holes 131 can reduce the deformation degree of the air holes 131 when balancing the internal and external air pressure, so that the service life of the sealing assembly is longer, and the radius of the air holes 131 ensures the ventilation effect of the air holes 131.
The air holes 131 are at least two and are rotationally symmetrical along the axis of the sealing ring 1. In this embodiment, the number of the air holes 131 is two, so that the air permeation effect can be better achieved.
The connection part of the first outer framework 212 and the second outer framework 222 is provided with an inclined surface 23, and the inclined surface 23 is arranged in the cavity. The inclined surface 23 facilitates the grease between the first seal lip 12 and the second seal lip 13 to flow back to the inside of the hub bearing through the breather holes 131.
The first seal lip 12 has a thickness larger at an end close to the connection portion 11 than at an end remote from the connection portion 11. The first seal lip 12 is kept in shape.
The first seal lip 12 includes a primary seal lip 121 and a secondary seal lip 122 disposed at an end away from the connecting portion 11, and an included angle between the primary seal lip 121 and the secondary seal lip 122 is less than 90 °. The first seal lip 12 is better abutted against the first outer framework 212, so that the lubricating grease between the first seal lip 12 and the second seal lip 13 is prevented from being extruded out of the first seal lip 12 when the hub bearing runs at a high speed.
One side of the first sealing lip 12, which is far away from the second sealing lip 13, is provided with a third sealing lip 14, the shape of which is consistent with that of the first sealing lip 12, one end of the third sealing lip 14 is fixedly connected with the connecting part 11, the other end of the third sealing lip is abutted against the first outer framework 212, and at least one third sealing lip 14 is arranged. The sealing effect of the sealing assembly is ensured.
The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention.
Claims (7)
1. The utility model provides a sealing assembly of wheel hub bearing, includes sealing washer, outer skeleton and inner frame, the mutual lock vacuole formation of outer skeleton and inner frame, outer skeleton include along the radial first outer skeleton of extending of inner circle and with the interior fixed second outer skeleton of following of first outer skeleton, the second outer skeleton along the axial extension of inner circle and with inner circle interference fit, the sealing washer includes the connecting portion of cladding on the inner frame and sets up the seal lip in the cavity, the seal lip includes first seal lip of butt on first outer skeleton and the second seal lip of butt on the second outer skeleton, its characterized in that: and the second sealing lip is provided with an air hole, and the air hole is formed in one end, far away from the connecting part, of the second sealing lip.
2. A seal assembly for a hub bearing according to claim 1, wherein: the air holes are semicircular holes, and the radius of the air holes is larger than or equal to 0.5 mm.
3. A seal assembly for a hub bearing according to claim 2, wherein: the bleeder vent is two at least and along the axis rotational symmetry of sealing washer.
4. A seal assembly for a hub bearing according to claim 3, wherein: the junction of first exoskeleton and second exoskeleton is equipped with the inclined plane, the inclined plane sets up in the cavity.
5. The seal assembly of a hub bearing according to claim 4, wherein: the thickness of the end, close to the connecting portion, of the first sealing lip is larger than that of the end, far away from the connecting portion, of the first sealing lip.
6. The seal assembly of a hub bearing according to claim 5, wherein: the first sealing lip comprises a main sealing lip and an auxiliary sealing lip which are arranged at one end far away from the connecting part, and an included angle between the main sealing lip and the auxiliary sealing lip is smaller than 90 degrees.
7. The seal assembly of a hub bearing according to claim 6, wherein: one side that the second seal lip was kept away from to first seal lip is equipped with the third seal lip unanimous with first seal lip form, the one end and the connecting portion fixed connection of third seal lip, other end butt are on first exoskeleton, the third seal lip is one at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121959746.7U CN215890816U (en) | 2021-08-19 | 2021-08-19 | Sealing assembly of hub bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121959746.7U CN215890816U (en) | 2021-08-19 | 2021-08-19 | Sealing assembly of hub bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890816U true CN215890816U (en) | 2022-02-22 |
Family
ID=80343035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121959746.7U Active CN215890816U (en) | 2021-08-19 | 2021-08-19 | Sealing assembly of hub bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890816U (en) |
-
2021
- 2021-08-19 CN CN202121959746.7U patent/CN215890816U/en active Active
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