Wheel hub inner cavity wading oil seal structure
By designing a water-walled oil seal structure in the inner cavity of the wheel hub, using multiple sealing positions and oil barrier plates to match rubber seals, the problems of oil seal oil leakage and early failure are solved, the sealing performance and service life are improved, and the maintenance frequency is reduced.
Patent Information
- Application Number
- CN202323562559.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-26
AI Technical Summary
Existing hub oil seals are prone to damage under complex road conditions, poor sealing performance, resulting in oil leakage of oil seals, early failure of bearings, and poor disassembly and assembly properties, resulting in frequent replacement and premature aging of rubber under high temperature environments.
A water-wafer oil seal structure in the inner cavity of the wheel hub is designed, including a first support frame and a second support frame, and an oil barrier plate and a rubber seal are provided. The sealing performance is improved through the coordination of multiple sealing positions and the fastening spring. Reduce the temperature of the rubber seal under high temperature environments, and supports repeated disassembly and is not prone to damage.
Effectively protect the inner cavity of the wheel hub, improve oil sealing and service life, reduce spare parts replacement, reduce failure rate, and extend service life.
Smart Images
Figure CN222277249U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wheel hub assembly, and particularly relates to a wheel hub inner cavity wading oil seal structure. Background Art
[0002] New energy buses have to withstand various extreme road conditions, such as driving on icy and snowy roads, gravel roads, muddy roads, potholes, undulating roads, slippery gravel roads, slippery bumpy roads, off-road roads, etc. When facing such complex road conditions, the existing drive rear axle will suffer from impurities damage, abnormal wear and failure of the oil seal lip, oil leakage of the wheel hub oil seal, and early failure of the bearing. Since the oil seal seat is directly exposed to the air side without a dust cover, it cannot block the brake powder, mud, gravel, impurities and other dirt brought by the outside world, resulting in a large amount of impurities gathering in the wheel hub oil seal, and the continuous friction and wear when the wheel end rotates. Brake powder is corrosive to the oil seal. The wheel hub oil seal is a conventional skeleton oil seal with poor sealing performance. The grease in the inner cavity of the wheel hub is easy to leak, and the lack of lubrication and external impurities will eventually lead to bearing damage. The oil seal has poor disassembly and assembly performance and will be deformed when it is removed. Every time it is removed, a new oil seal has to be replaced, causing wear and tear. When the vehicle is running for a long time, the temperature of the inner cavity of the wheel hub will rise sharply and remain at a high temperature for a long time. The rubber and tension spring parts in the oil seal are often in this environment, which is prone to premature aging, causing the rubber to crack and the tension spring to lose its preload function, ultimately causing the oil seal to leak and fail. Utility Model Content
[0003] The purpose of the utility model is to solve the above technical problems and provide a wheel hub inner cavity wading oil seal structure, so that the oil seal is not easily damaged after repeated disassembly, the sealing performance of the oil seal is improved, and the service life of the oil seal is increased. In order to achieve the above purpose, the technical solution of the utility model is as follows:
[0004] The wheel hub inner cavity water-wading oil seal structure includes a first support frame and a second support frame, an oil baffle plate is arranged at the end of the first support frame, an inner cavity for accommodating the second support frame is formed between the oil baffle plate and the first support frame, a first rubber seal is arranged on the outer wall of the first support frame, a second rubber seal is arranged on the side wall of the second support frame, the second rubber seal extends from the end of the second support frame to the position between the oil baffle plate and the first support frame, a tightening tension spring for limiting the position of the second rubber seal to the inner wall of the first support frame is arranged in the inner cavity, an oil seal inlet is formed between the second rubber seal and the end of the first support frame, and an oil seal outlet is formed between the second rubber seal and the end of the oil baffle plate.
[0005] Specifically, the cross-section of the first support frame is a U-shaped structure, the outer side of the first support frame is an air space, and the inner side of the first support frame is an inner cavity of the wheel hub.
[0006] Specifically, the second support frame includes a connecting portion located above the upper portion of the first support frame, and a turning portion connected to an end of the connecting portion and extending around to the inner cavity.
[0007] Specifically, the second rubber seal is arranged along the outer wall of the connecting portion and extends to the outside of the turning portion, and the second rubber seal is positioned on the inner wall of the first supporting frame by tightening the tension spring.
[0008] Specifically, the cross-section of the oil baffle is an L-shaped structure, the tightening tension spring is located on the inner side of the oil baffle, one end of the oil baffle is connected to the longer end of the first support frame, and the other end of the oil baffle is adjacent to the side of the turning part.
[0009] Specifically, the oil baffle plate and the side edge of the turning portion are located at the oil seal outlet, and the turning portion and the shorter end of the first support frame are located at the oil seal inlet.
[0010] Specifically, the second rubber seal includes a first sealing protrusion arranged on the outer wall of the connecting part, a second sealing protrusion arranged on the end of the turning part close to the first support frame, a third sealing protrusion arranged on the side wall of the turning part and abutting against the inner wall of the first support frame, a fourth sealing protrusion, a fifth sealing protrusion, a sixth sealing protrusion arranged between the tightening tension spring and the first support frame, and a seventh sealing protrusion arranged on the turning part close to the oil baffle plate.
[0011] Specifically, the second sealing protrusion is located at an oil seal inlet position, and the seventh sealing protrusion is located at an oil seal outlet position.
[0012] Compared with the prior art, the beneficial effects of the wheel hub inner cavity wading oil seal structure of the utility model are mainly reflected in:
[0013] When the wheel hub wades through water or passes through a muddy road, the oil seal inlet to the oil seal outlet needs to pass through multiple sealing positions, thereby effectively protecting the inner cavity of the wheel hub; an oil baffle is set at the end of the first support frame, and the oil baffle cooperates with the second rubber seal to isolate the high temperature of the inner cavity of the wheel hub, reduce the temperature of the second rubber seal and the first rubber seal, and obtain the best sealing performance with a smaller radial force, thereby improving the sealing and durability of the entire oil seal assembly. During daily inspection or maintenance, the wheel end needs to be disassembled. This type of oil seal supports repeated disassembly and is not easily damaged. During the service life, it can significantly reduce the frequent replacement of spare parts. The ability of the entire axle wheel end assembly to resist complex external environments is enhanced, the failure rate is greatly reduced, daily maintenance of the wheel end is reduced, and the service life is significantly improved compared to traditional structures. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a cross-sectional schematic diagram of the installation position of the oil seal in an embodiment of the utility model;
[0015] Figure 2This is a schematic cross-sectional view of the oil seal in this embodiment;
[0016] The numbers in the figure represent:
[0017] 1 first support frame, 2 second support frame, 21 connecting portion, 22 turning portion, 3 oil baffle, 4 first rubber seal, 5 second rubber seal, 51 first sealing convex portion, 52 second sealing convex portion, 53 third sealing convex portion, 54 fourth sealing convex portion, 55 fifth sealing convex portion, 56 sixth sealing convex portion, 57 seventh sealing convex portion, 6 tightening tension spring, 7 oil seal inlet, 8 oil seal outlet, 9 shaft tube, 91 wheel hub, 92 oil seal seat ring assembly. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present utility model are clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0019] Example:
[0020] Reference Figure 1-2 As shown, this embodiment is a wheel hub inner cavity wading oil seal structure, including a first support frame 1 and a second support frame 2, an oil baffle plate 3 is arranged at the end of the first support frame 1, an inner cavity for accommodating the second support frame 2 is formed between the oil baffle plate 3 and the first support frame 1, a first rubber seal 4 is arranged on the outer wall of the first support frame 1, a second rubber seal 5 is arranged on the side wall of the second support frame 2, the second rubber seal 5 extends from the end of the second support frame 2 to the position between the oil baffle plate 3 and the first support frame 1, a tightening tension spring 6 for limiting the second rubber seal 5 to the inner wall of the first support frame 1 is arranged in the inner cavity, an oil seal inlet 7 is formed between the second rubber seal 5 and the end of the first support frame 1, and an oil seal outlet 8 is formed between the second rubber seal 5 and the end of the oil baffle plate 3.
[0021] The shaft tube 9 connected to the middle section of the bridge housing is fitted and rotated with the wheel hub 91, and an oil seal seat ring assembly 92 and an oil seal structure are arranged between the shaft tube 9 and the wheel hub 91. The oil seal seat ring assembly 92 is set on the outer periphery of the shaft tube 9 by interference fit, and the oil seal structure is fitted on the outer periphery of the oil seal seat ring assembly 92 and is located on the inner periphery of the wheel hub 91 near the end surface of the wheel hub 91.
[0022] The cross section of the first support frame 1 is a U-shaped structure, the outer side of the first support frame 1 is an air space, and the inner side of the first support frame 1 is a wheel hub inner cavity. The upper part of the first rubber seal 4 seals against the inner periphery of the wheel hub 91, and the lower part of the first rubber seal 4 seals against the outer periphery of the oil seal seat ring assembly 92.
[0023] The second support frame 2 includes a connection portion 21 located above the upper portion of the first support frame 1, and a turning portion 22 connected to the end of the connection portion 21 and extending to the inner cavity, and the cross section of the turning portion 22 is a Z-shaped structure. The second rubber seal 5 is arranged along the outer wall of the connection portion 21 and extends to the outside of the turning portion 22. The second rubber seal 5 is positioned on the inner wall of the first support frame 1 by tightening the tension spring 6, thereby realizing the connection between the second support frame 2 and the first support frame 1.
[0024] The cross section of the oil baffle plate 3 is an L-shaped structure, and the tightening tension spring 6 is located at the inner side of the oil baffle plate 3. One end of the oil baffle plate 3 is connected to the longer end of the first support frame 1, and the other end of the oil baffle plate 3 is adjacent to the side of the turning portion 22. The side of the oil baffle plate 3 and the turning portion 22 are at the oil seal outlet 8. The shorter end of the turning portion 22 and the first support frame 1 is at the oil seal inlet 7.
[0025] The second rubber seal 5 includes a first sealing protrusion 51 provided on the outer wall of the connecting portion 21, a second sealing protrusion 52 provided on the end of the turning portion 22 close to the first support frame 1, a third sealing protrusion 53, a fourth sealing protrusion 54, a fifth sealing protrusion 55 provided on the side wall of the turning portion 22 and against the inner wall of the first support frame 1, a sixth sealing protrusion 56 provided between the tightening tension spring 6 and the first support frame 1, and a seventh sealing protrusion 57 provided on the turning portion 22 close to the oil baffle 3. The second sealing protrusion 52 is located at the oil seal inlet 7, and the seventh sealing protrusion 57 is located at the oil seal outlet 8.
[0026] When this embodiment is applied, when the wheel hub 91 is wading through water or passing through a muddy road, the oil seal inlet 7 to the oil seal outlet 8 needs to pass through multiple sealing positions, thereby effectively protecting the inner cavity of the wheel hub 91; an oil baffle plate 3 is provided at the end of the first support frame 1, and the oil baffle plate 3 cooperates with the second rubber seal 5 to isolate the high temperature of the inner cavity of the wheel hub 91, reduce the temperature of the second rubber seal 5 and the first rubber seal 4, and obtain the best sealing performance with a smaller radial force, thereby improving the sealing and durability of the entire oil seal assembly. During daily inspection or maintenance, the wheel end needs to be disassembled. This type of oil seal supports repeated disassembly and is not easily damaged. During the service life, the frequent replacement of spare parts can be significantly reduced. The ability of the entire axle wheel end assembly to resist complex external environments is enhanced, the failure rate is greatly reduced, the daily maintenance of the wheel end is reduced, and the service life is significantly improved compared to the traditional structure.
[0027] In the description of this specification, the term "specific embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0028] Although the implementation methods disclosed in the utility model are as above, the above contents are only implementation methods adopted to facilitate the understanding of the utility model, and are not used to limit the utility model. Any technician in the field to which the utility model belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the utility model, but the scope of patent protection of the utility model shall still be based on the scope defined in the attached claims.
Claims
1. The wheel hub inner cavity wading oil seal structure is characterized by: The invention comprises a first support frame and a second support frame, wherein an oil baffle plate is arranged at the end of the first support frame, an inner cavity for accommodating the second support frame is formed between the oil baffle plate and the first support frame, a first rubber seal is arranged on the outer wall of the first support frame, a second rubber seal is arranged on the side wall of the second support frame, the second rubber seal extends from the end of the second support frame to the position between the oil baffle plate and the first support frame, a tightening tension spring for limiting the position of the second rubber seal to the inner wall of the first support frame is arranged in the inner cavity, an oil seal inlet is formed between the second rubber seal and the end of the first support frame, and an oil seal outlet is formed between the second rubber seal and the end of the oil baffle plate.
2. The wheel hub inner cavity water-wading oil seal structure according to claim 1, characterized in that: The cross section of the first support frame is a U-shaped structure, the outer side of the first support frame is an air space, and the inner side of the first support frame is a wheel hub inner cavity.
3. The wheel hub inner cavity water-wading oil seal structure according to claim 1, characterized in that: The second support frame includes a connecting portion located above the upper portion of the first support frame, and a turning portion connected to an end of the connecting portion and extending around to the inner cavity.
4. The wheel hub inner cavity water-wading oil seal structure according to claim 3, characterized in that: The second rubber seal is arranged along the outer wall of the connecting portion and extends to the outside of the turning portion. The second rubber seal is positioned on the inner wall of the first supporting frame by tightening the tension spring.
5. The wheel hub inner cavity water-wading oil seal structure according to claim 3, characterized in that: The cross section of the oil baffle is an L-shaped structure, the tightening tension spring is located on the inner side of the oil baffle, one end of the oil baffle is connected to the longer end of the first support frame, and the other end of the oil baffle is adjacent to the side of the turning part.
6. The wheel hub inner cavity water-wading oil seal structure according to claim 3, characterized in that: The oil baffle plate and the side edge of the turning portion are located at the oil seal outlet, and the turning portion and the shorter end of the first support frame are located at the oil seal inlet.
7. The wheel hub inner cavity water-wading oil seal structure according to claim 3, characterized in that: The second rubber seal includes a first sealing protrusion arranged on the outer wall of the connecting part, a second sealing protrusion arranged on the end of the turning part close to the first support frame, a third sealing protrusion arranged on the side wall of the turning part and abutting against the inner wall of the first support frame, a fourth sealing protrusion, a fifth sealing protrusion, a sixth sealing protrusion arranged between the tightening tension spring and the first support frame, and a seventh sealing protrusion arranged on the turning part close to the oil baffle plate.
8. The wheel hub inner cavity water-wading oil seal structure according to claim 7, characterized in that: The second sealing protrusion is located at an oil seal inlet position, and the seventh sealing protrusion is located at an oil seal outlet position.