CN219432438U - Sealing structure for hub bearing - Google Patents
Sealing structure for hub bearing Download PDFInfo
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- CN219432438U CN219432438U CN202223439498.0U CN202223439498U CN219432438U CN 219432438 U CN219432438 U CN 219432438U CN 202223439498 U CN202223439498 U CN 202223439498U CN 219432438 U CN219432438 U CN 219432438U
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- Prior art keywords
- rubber
- lip
- dust cover
- grease
- space
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Sealing Of Bearings (AREA)
Abstract
The utility model discloses a sealing structure for a hub bearing, which comprises a rubber layer, an outer framework, a dust cover, grease a and grease b, wherein the rubber layer is coated on the outer framework, the rubber layer and the outer framework are fixed through rubber vulcanization and adhesion, the rubber layer comprises a rubber labyrinth lip, a rubber outer lip and a rubber grease sealing lip, and the dust cover is arranged on the rubber layer. According to the utility model, the surface of the dust cover is subjected to magnetic polishing to form an uneven surface, so that a friction surface between the dust cover and rubber can store a trace amount of grease, the rubber wear surface can be fully lubricated with grease, the rubber wear is reduced, and the service life is prolonged; the labyrinth structure with multiple turning forms a clearance seal, does not increase torque, can fully lubricate the rubber lip wearing surface by grease, reduces rubber wearing and prolongs the service life; and the surface sand blasting of the rubber outer lip and the rubber oil sealing lip is matched to form an uneven surface, so that the thickness of an oil film contacted between the rubber outer lip and the rubber oil sealing lip and the dust cover is increased, and the torque is reduced.
Description
Technical Field
The utility model relates to the field of sealing of hub bearings, in particular to a sealing structure for a hub bearing.
Background
The box-type rubber sealing ring consists of two parts which can rotate relatively, at present, the bearing is sealed, a rubber lip contact type sealing structure is used mostly, the bearing sealing ring is required to prevent muddy water outside the bearing from entering the bearing, meanwhile, grease inside the bearing is prevented from flowing out of the bearing, the service life of the sealing ring is prolonged as much as possible, the torque is reduced, and low energy consumption and less maintenance are realized;
the rubber lip is adhered to the metal surface to rub so as to achieve the sealing effect, the rotary friction rubber can generate abrasion, and the abrasion is required to be reduced so as to prolong the service life of the rubber lip;
the abrasion is reduced by the following three methods: 1. low-friction grease can be replaced; 2. the contact force of the rubber lip can be reduced; 3. surface roughness and the like of the contact with each other can be improved;
the prior method for improving the metal surface roughness of the dust cover is to coarsen the metal surface by utilizing a sand blasting technology, and only a single operation can be carried out on the workpiece due to the fact that the workpiece is thin and easy to deform, so that the mass production efficiency is low, a low friction moment sealing ring with the application number of 202122350873.3 is disclosed in the prior art, three rubber lip surfaces are disclosed in the prior art, but are directly contacted with the end surface of the sealing cover, and the torque is larger due to the fact that the three rubber lip surfaces are contacted with the end surface of the sealing cover, the surface abrasion of the rubber lip surfaces is accelerated, and the service life of the rubber abrasion surface is reduced.
In order to solve the problems, on the premise of ensuring the sealing performance, a novel bearing sealing ring is designed.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a sealing structure for a hub bearing.
The utility model provides the following technical scheme:
the utility model provides a sealing structure for a hub bearing, which comprises a rubber layer, an outer framework, a dust cover, grease a and grease b, wherein the rubber layer is coated on the outer framework, the rubber layer and the outer framework are fixed through rubber vulcanization and adhesion, the rubber layer comprises a rubber labyrinth lip, a rubber outer lip and a rubber grease sealing lip, and the dust cover is arranged on the rubber layer;
the dust cover is of a -shaped structure; a U-shaped cavity is formed between the dust cover and the rubber layer, and comprises an a space, a b space, a c space and a d space from left to right;
the rubber outer lip is in inclined surface contact with the inner top surface of the dust cover to form a rubber outer lip wear surface A, the rubber outer lip is in inclined surface contact with the right inner wall of the dust cover to form a rubber seal grease lip wear surface B, grease a is coated on the contact surface between the rubber outer lip wear surface A and the dust cover, and grease B is coated on the contact surface between the rubber seal grease lip wear surface B and the inner wall of the dust cover; the surface of the dust cover is polished by a magnetic grinder to form an uneven surface, and the surface roughness of the dust cover is Ra0.3-0.6;
the d space is positioned between the rubber labyrinth lip and a gap at the included angle of the top surface of the left inner wall of the dust cover.
As a preferable technical scheme of the utility model, the gap between the rubber labyrinth lip and the included angle of the top surface of the left inner wall of the dust cover is 0.3mm.
As a preferable technical scheme of the utility model, the surface roughness of the abrasion surface A of the rubber outer lip is Ra0.3-0.6 formed by a rubber mold sand blasting technology.
As a preferable technical scheme of the utility model, the surface roughness of the abrasion surface B of the rubber seal grease lip is Ra0.3-0.6 formed by a rubber mold sand blasting technology.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the surface of the dust cover is subjected to magnetic polishing by the magnetic grinder to form an uneven surface, and the surface roughness of the dust cover is Ra0.3-0.6, so that the friction surface of the dust cover and rubber can store trace grease, the rubber wear surface can be fully lubricated by grease, the rubber wear is reduced, and the service life is prolonged;
the labyrinth structure with the multiple turning parts comprises a labyrinth cavity formed between the dustproof cover and the rubber layer, wherein the labyrinth cavity comprises an a space, a b space, a c space and a d space from left to right, so that the abrasion surface of the rubber lip can be lubricated by sufficient grease, the rubber abrasion is reduced, and the service life is prolonged;
there is d space in the rubber labyrinth lip for the rubber labyrinth lip 11 and shield form clearance seal, do not direct contact shield, only have the contact terminal surface of two rubber lips and sealed lid, in radial and axial and shield little clearance 0.3mm design, form radial and axial two-way maze when not increasing the moment of torsion, increase sealing performance, and cooperate the surface sand blasting of rubber outside lip, rubber seal grease lip to form unsmooth surface, realize increasing the oil film thickness of contact between two and the shield, reduce the effect of moment of torsion.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a block diagram of the present utility model;
in the figure: 1. a rubber layer; 2. an outer skeleton; 3. a dust cover; 4. grease a; 5. grease b;
11. a rubber labyrinth lip; 22. a rubber outer lip; 33. rubber seals the oil lip.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model. Wherein like reference numerals refer to like elements throughout.
Further, if detailed description of the known art is not necessary to illustrate the features of the present utility model, it will be omitted. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
Example 1
As shown in fig. 1, the utility model provides a sealing structure for a hub bearing, which comprises a rubber layer 1, an outer framework 2, a dust cover 3, grease a4 and grease b5, wherein the rubber layer 1 is coated on the outer framework 2, the rubber layer 1 and the outer framework 2 are fixed through rubber vulcanization and adhesion, the rubber layer 1 comprises a rubber labyrinth lip 11, a rubber outer lip 22 and a rubber grease sealing lip 33, and the dust cover 3 is arranged on the rubber layer 1;
the dust cover 3 is of a -shaped structure; a U-shaped labyrinth cavity is formed between the dust cover 3 and the rubber layer 1, and comprises an a space, a b space, a c space and a d space from left to right;
the inclined surface contact between the rubber outer lip 22 and the inner top surface of the dust cover 3 forms a rubber outer lip wear surface A, the inclined surface contact between the rubber grease sealing lip 33 and the right inner wall of the dust cover 3 forms a rubber grease sealing lip wear surface B, grease a4 is coated on the contact surface between the rubber outer lip wear surface A and the dust cover 3, and grease B5 is coated on the contact surface between the rubber grease sealing lip wear surface B and the inner wall of the dust cover 3; the surface of the dust cover 3 is polished by a magnetic grinder to form an uneven surface, and the surface roughness of the dust cover 3 is Ra0.3-0.6
The space d is positioned between the rubber labyrinth lip 11 and the gap at the included angle of the left side inner wall top surface of the dust cover 3, namely, the rubber labyrinth lip 11 and the dust cover 3 are not contacted.
The gap between the rubber labyrinth lip 11 and the included angle of the top surface of the left inner wall of the dust cover 3 is 0.3mm, and the small gap between the radial and axial directions and the dust cover 3 is 0.3mm, so that the torque is not increased, and meanwhile, a radial and axial two-way labyrinth is formed, and the sealing performance is improved.
The surface of the dust cover 3 is polished by magnetic force to form an uneven surface, the surface roughness of the dust cover 3 is Ra0.3-0.6, the magnetic force polishing technology is adopted to destroy the bright surface of the original steel plate, the frequency and time are adjusted, the grinding fluid and the steel needle are used for controlling the surface quality, the surface roughness is verified to be Ra0.3-0.6, and the oil film thickness of the rubber outer lip 22 and the rubber sealing grease lip 33 contacted with the dust cover 3 can be increased, so that the rubber abrasion is reduced; meanwhile, oil stains, burrs, scratches and the like on the surface of the dust cover 3 can be removed, and the yield of the dust cover 3 is improved.
The magnetic polishing technology is characterized in that a magnetic polishing machine drives a steel needle to rotate and vibrate at a high speed by utilizing a strong magnetic field, the steel needle is scratched on the inner surface and the outer surface of the metal dust cover 3, the surface roughness is controlled by adjusting the frequency and the time of the grinding fluid and the steel needle, and meanwhile, oil stains, burrs, scratches and the like on the surface of the dust cover 3 are removed.
The surface roughness of the abrasion surface A of the outer side lip of the rubber is Ra0.3-0.6 formed by a rubber mold sand blasting technology, the turning lines on the surface of the original outer side lip 22 are damaged, the thickness of an oil film contacting the outer side lip 22 of the rubber and the dust cover 3 is increased, and the torque is reduced.
The surface roughness of the abrasion surface B of the rubber seal grease lip is Ra0.3-0.6 formed by a rubber mold sand blasting technology, original turning lines are damaged, the thickness of an oil film contacted by the rubber seal grease lip 33 and the dust cover 3 is increased, and the torque is reduced.
Further, the working principle of the device structure is as follows:
the bearing sealing ring is required to prevent muddy water outside the bearing from entering the bearing, and meanwhile prevents grease inside the bearing from flowing outside the bearing, so that the service life of the sealing ring is prolonged as much as possible, the torque is reduced, and low energy consumption and less maintenance are realized.
The dust cover 3 is of a -shaped structure; a U-shaped cavity is formed between the dust cover 3 and the rubber layer 1, and comprises an a space, a b space, a c space and a d space from left to right, wherein the four spaces are communicated to form a labyrinth structure;
mud water enters from the space a, passes through the space b of the small-clearance labyrinth, passes through the space c of the labyrinth, and finally passes through the space d of the labyrinth which is small in clearance in the radial direction and the axial direction, and the interference rubber outside lip 22 blocks the mud water from entering the bearing.
Grease flows outwards from the bearing interior and is blocked by the interference rubber grease sealing lip 33;
according to the utility model, the surface of the dust cover 3 is polished by magnetic force through the magnetic grinder to form an uneven surface, so that the friction surface between the dust cover and rubber can store trace grease, the rubber wear surface can be fully lubricated by grease, the rubber wear is reduced, and the service life is prolonged;
the labyrinth cavity formed between the dustproof cover 3 and the rubber layer 1 in the whole structure comprises an a space, a b space, a c space and a d space from left to right, and the labyrinth structure with multiple turns forms a runner space with multiple turns, and the end part of the rubber labyrinth lip 11 in the d space is not in direct contact with the dustproof cover 3, so that the end part is in clearance fit, the torque is not increased, the abrasion surface of the rubber lip can be fully lubricated by grease, the rubber abrasion is reduced, and the service life is prolonged;
the rubber labyrinth lip 11 is not in contact with the dust cover 3, and is designed to have a small clearance of 0.3mm between the radial direction and the axial direction and the dust cover 3, so that the radial direction and the axial direction are formed in a two-way labyrinth without increasing torque, the sealing performance is improved, the uneven surface is formed by matching with the surface sand blasting of the rubber outer lip 22 and the rubber oil sealing lip 33, the thickness of an oil film in contact between the rubber outer lip 22 and the dust cover 3 is increased, and the torque is reduced.
Finally, it should be noted that: the above is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that the present utility model is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (4)
1. The utility model provides a hub bearing seal structure, includes rubber layer (1), exoskeleton (2), shield (3), grease a (4), grease b (5), its characterized in that, rubber layer (1) cladding is on exoskeleton (2), rubber layer (1) and exoskeleton (2) are fixed through rubber vulcanization bonding, rubber layer (1) includes rubber labyrinth lip (11), rubber outside lip (22) and rubber seal grease lip (33), shield (3) set up on rubber layer (1);
the dustproof cover (3) is of a -shaped structure; a U-shaped cavity is formed between the dust cover (3) and the rubber layer (1), and comprises an a space, a b space, a c space and a d space from left to right;
the rubber outside lip (22) and the inner top surface of the dust cover (3) are in inclined surface contact to form a rubber outside lip abrasion surface A, the rubber outside lip abrasion surface B is formed by inclined surface contact between the rubber outside lip (33) and the right inner wall of the dust cover (3), grease a (4) is coated on the contact surface between the rubber outside lip abrasion surface A and the dust cover (3), and grease B (5) is coated on the contact surface between the rubber outside lip abrasion surface B and the inner wall of the dust cover (3); the surface of the dust cover (3) is polished by a magnetic grinder to form an uneven surface, and the surface roughness of the dust cover (3) is Ra0.3-0.6;
the d space is positioned between the rubber labyrinth lip (11) and a gap at the included angle of the top surface of the left inner wall of the dust cover (3).
2. A sealing structure for a hub bearing according to claim 1, wherein the clearance between the rubber labyrinth lip (11) and the angle of the top surface of the left inner wall of the dust cover (3) is 0.3mm.
3. The sealing structure for a hub bearing according to claim 1, wherein the surface roughness of the worn surface of the rubber outside lip a is ra 0.3-0.6 by a rubber die blasting technique.
4. The sealing structure for hub bearings according to claim 1, wherein the surface roughness of the worn surface of the rubber seal grease lip B is ra 0.3-0.6 by a rubber die blasting technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223439498.0U CN219432438U (en) | 2022-12-21 | 2022-12-21 | Sealing structure for hub bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223439498.0U CN219432438U (en) | 2022-12-21 | 2022-12-21 | Sealing structure for hub bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219432438U true CN219432438U (en) | 2023-07-28 |
Family
ID=87338629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223439498.0U Active CN219432438U (en) | 2022-12-21 | 2022-12-21 | Sealing structure for hub bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219432438U (en) |
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2022
- 2022-12-21 CN CN202223439498.0U patent/CN219432438U/en active Active
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