Speed reducer and vehicle
By using interval-set dust cover and oil seal in the reducer, and using interference fit and bending parts and other designs, the problem of poor sealing effect of half-axle oil seal is solved, the sealing effect and dust protection performance are improved, and the lubricating oil is reduced Risk of leakage.
Patent Information
- Application Number
- CN202421332117.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The sealing effect of the half-shaft oil seal in existing reducers is poor, resulting in lubricating oil leakage and external dirt entering.
The dustproof cover and oil seal are arranged at intervals. The first sealing lip is interfered with the dustproof cover, and the second sealing lip is interfered with the half-axis to enhance the sealing effect, and the dustproof performance is improved through the bending part and the insertion part. .
It effectively reduces the risk of external impurities entering, improves the sealing effect, protects the sealing lip, reduces the risk of lubricant leakage, and enhances the dustproof performance of the reducer.
Smart Images
Figure CN222296924U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of reducers, and in particular to a reducer and a vehicle. Background Art
[0002] The automobile main reducer is an assembly component that can achieve deceleration and torque increase, inter-wheel differential, and change the direction of power transmission. The half-shaft oil seal is an important component in the main reducer. Its main functions include preventing the lubricating oil inside the main reducer from leaking from the half-shaft area, and preventing dirt, moisture, impurities and dust outside the main reducer from entering the main reducer. In the related art, the half-shaft oil seal usually includes a main sealing lip and a secondary sealing lip, and the sealing is achieved by the cooperation of the sealing lip and the half-shaft. Sealing only by the cooperation of the sealing lip and the half-shaft results in poor sealing effect. Utility Model Content
[0003] The embodiment of the present application provides a base station data detection system to solve the problem of low base station data detection efficiency in the prior art.
[0004] In order to solve the above technical problems, the present application is implemented as follows;
[0005] In a first aspect, an embodiment of the present application provides a reducer, comprising a dust cover and an oil seal arranged at intervals;
[0006] The dust cover comprises a first through hole, and the dust cover is sleeved on the half shaft of the reducer through the first through hole;
[0007] The oil seal includes a second through hole, a first sealing lip and a second sealing lip. The oil seal is sleeved on the half shaft through the second through hole. The first sealing lip is arranged on the end surface of the oil seal facing the dust cover, and the first sealing lip extends in the direction of the dust cover and has an interference fit with the dust cover. The second sealing lip protrudes relative to the inner wall of the second through hole and has an interference fit with the half shaft of the reducer.
[0008] In a second aspect, an embodiment of the present application provides a vehicle, comprising the reducer described in the first aspect.
[0009] In the embodiment of the present application, the first sealing lip of the oil seal is arranged on the end face of the oil seal facing the dust cover, and extends in the direction of the dust cover and has an interference fit with the dust cover, and the second sealing lip of the oil seal has an interference fit with the half shaft. By setting the first sealing lip and the dust cover to have an interference fit, the risk of impurities and mud in the external environment entering the second sealing lip through the gap between the dust cover and the oil seal can be effectively reduced, which is beneficial to improving the sealing effect of the reducer, reducing the risk of the second sealing lip being damaged by the outside, and achieving a reliable protection effect for the second sealing lip. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0011] Figure 1 A schematic diagram of the structure of a reducer provided in an embodiment of the present application;
[0012] Figure 2 Provided for the embodiments of this application Figure 1 A partial enlarged view of
[0013] Figure 3 A schematic diagram of the structure of a dust cover provided in an embodiment of the present application;
[0014] Figure 4 A schematic diagram of the structure of an oil seal provided in an embodiment of the present application. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0016] like Figures 1 to 4 As shown, an embodiment of the present application provides a reducer, comprising a dust cover 1 and an oil seal 2 arranged at intervals;
[0017] The dust cover comprises a first through hole, and the dust cover is sleeved on the half shaft 3 of the reducer through the first through hole;
[0018] The oil seal 2 includes a second through hole, a first sealing lip 21 and a second sealing lip 22. The oil seal 2 is sleeved on the half shaft 3 through the second through hole. The first sealing lip 21 is arranged on the end surface of the oil seal 2 facing the dust cover 1, and the first sealing lip 21 extends in the direction of the dust cover 1 and has an interference fit with the dust cover 1. The second sealing lip 22 protrudes relative to the inner wall of the second through hole and has an interference fit with the half shaft 3 of the reducer.
[0019] The reducer is an important component of a vehicle, and the reducer in the embodiment of the present application may be an independent main reducer.
[0020] The dust cover 1 and the oil seal 2 are arranged at intervals and are respectively sleeved on the half shaft 3 of the main reducer through corresponding through holes. The dust cover 1 is used to prevent dirt, moisture, impurities and dust in the external environment of the reducer from entering the interior of the reducer. In the embodiment of the present application, the inner ring of the dust cover 1 (the inner ring forms the above-mentioned first through hole) can be pressed onto the half shaft 3 through interference fit and assembled as a whole with the half shaft 3 to improve the sealing performance between the dust cover 1 and the half shaft 3. During the driving of the vehicle, the dust cover 1 rotates with the half shaft 3.
[0021] The oil seal 2 is used to prevent the lubricating oil inside the reducer from leaking from the half-shaft 3 area, and to prevent dirt, moisture, impurities and dust in the external environment of the reducer from entering the reducer. The outer ring of the oil seal 2 can be pressed into the oil seal mounting hole of the reducer housing 4 by interference fit. During the driving process of the vehicle, the oil seal 2 does not rotate with the reducer housing 4, and the half-shaft 3 and the sealing lip provided on the inner wall of the second through hole of the oil seal 2 are operated by relative friction. The inner wall of the inner ring of the oil seal 2 (or the inner wall of the second through hole) is convexly provided with a second sealing lip 22, which is interference fit with the half-shaft 3 to prevent the lubricating oil inside the reducer from leaking from the half-shaft 3 area. The second sealing lip 22 can also be called the main sealing lip of the oil seal 2. A first sealing lip 21 is provided on the end face of the oil seal 2 facing the dust cover 1. The first sealing lip 21 is interference fit with the dust cover 1, thereby effectively reducing the risk of external impurities and the like invading the second sealing lip 22 from the gap between the dust cover 1 and the oil seal 2 and scratching the second sealing lip 22, thereby achieving a reliable protection effect on the second sealing lip 22 and reducing the risk of leakage of the reducer lubricating oil.
[0022] The embodiment of the present application provides an interference fit between the first sealing lip 21 and the dust cover 1, which can effectively reduce the risk of impurities and mud in the external environment entering the second sealing lip 22 through the gap between the dust cover 1 and the oil seal 2, which is beneficial to improving the sealing effect of the reducer, reducing the risk of the second sealing lip 22 being damaged by the outside, and achieving a reliable protection effect for the second sealing lip 22.
[0023] Optionally, the dust cover 1 includes an outer ring and an inner ring forming the first through hole, and the dust cover 1 also includes a bending portion arranged between the outer ring and the inner ring, the bending portion includes a first bending circle 11, a second bending circle 12, and a straight circle 13 between the first bending circle 11 and the second bending circle 12, the axis of the straight circle 13 is parallel to the axis of the half shaft 3, and the first sealing lip 21 is interference fit with the inner wall of the straight circle 13.
[0024] In this embodiment, the bending parts provided on the inner ring and the outer ring are used to contact and cooperate with the first sealing lip 21 to achieve sealing protection. Specifically, the bending parts include a first bending ring 11, a second bending ring 12, and a straight ring 13 between the first bending ring 11 and the second bending ring 12, and the axis of the straight ring 13 is parallel to the axis of the semi-shaft 3. The first bending ring 11 and the second bending ring 12 refer to the rings with bent inner walls, such as Figure 1 to Figure 2 As shown, the opening directions of the first bending circle 11 and the second bending circle 12 can be opposite. The first sealing lip 21 has an interference fit with the inner wall of the straight circle 13. The straight circle 13 refers to a circle without a bend in the inner wall. The inner wall length of the straight circle 13 can be set longer. The main reducer related parts will have dimensional tolerances and assembly tolerances in the axial direction of the half shaft 3. Setting the inner wall length of the straight circle 13 longer can ensure that under the extreme tolerance, the first sealing lip 21 can still have an interference fit with the inner wall of the straight circle 13, rather than an interference fit with the inner wall of the first bending circle 11 or the second bending circle 12.
[0025] The embodiment of the present application arranges the first sealing lip 21 to cooperate with the straight circle 13 of the bending portion instead of the bending circle, which is beneficial to ensure that the contact interference between the dust cover 1 and the first sealing lip 21 meets the design requirements, thereby ensuring the consistency and stability of the fitting state.
[0026] Optionally, the straight ring 13 is a straight ring 13 with a constant inner diameter.
[0027] The straight ring 13 is a straight ring 13 of equal inner diameter, that is, the inner diameter size of the straight ring 13 is the same in the axial direction. By such an arrangement, during the relative friction operation between the dust cover 1 and the oil seal 2, the interference fit can be always maintained to maintain the sealing performance.
[0028] Optionally, an outer ring of the dust cover 1 is surrounded by an inserting portion 14 protruding toward the oil seal 2 , and a housing 4 of the reducer is surrounded by a groove 41 adapted to the inserting portion 14 , and the inserting portion 14 is inserted into the groove 41 .
[0029] In this embodiment, after the half shaft 3 is assembled, the inserting portion 14 of the outer ring of the dust cover 1 is inserted into the groove 41 of the housing 4 of the reducer, and cooperates with the groove 41 for protection to form a maze-like passage. The above arrangement is conducive to improving the dustproof performance of the dust cover 1.
[0030] In some embodiments, the dust cover 1 may be a metal part to increase the service life of the dust cover 1. During the driving process of the vehicle, the outer ring of the dust cover 1 rotates in the above-mentioned groove 41. Since the dust cover 1 and the housing 4 of the reducer are both metal parts, a certain gap may be left between the dust cover 1 and the groove 41 to reduce friction. During configuration, the gap between the edge of the outer ring of the dust cover 1 and the edge of the groove 41 of the housing 4 of the reducer should be as small as possible to achieve better protection.
[0031] Optionally, a fitting portion 15 extending toward the oil seal 2 is provided around the inner ring of the dust cover 1 , and the fitting portion 15 fits with the half shaft 3 .
[0032] In this embodiment, the fitting portion 15 can increase the contact area between the dust cover 1 and the half shaft 3, which is beneficial to improving the stability of the dust cover 1 installed on the half shaft 3 and improving the sealing performance.
[0033] Optionally, the oil seal 2 further includes a third sealing lip 23 , the third sealing lip 23 protrudes relative to the inner wall of the second through hole, and the third sealing lip 23 is closer to the dust cover 1 relative to the second sealing lip 22 .
[0034] In this embodiment, the oil seal 2 further includes a third sealing lip 23, which is used to protect the impurities and sand in the external environment of the reducer, and prevent the impurities and sand in the external environment from scratching the first sealing lip 21 and causing the lubricating oil to leak. It can be seen that by providing the third sealing lip 23, the protection effect can be improved.
[0035] Optionally, the inner diameter of the third sealing lip 23 is smaller than the inner diameter of the second sealing lip 22 .
[0036] The second sealing lip 22 is a main sealing lip, used to prevent lubricating oil from leaking from the half shaft 3 area. The third sealing lip 23 is a secondary sealing lip, used to improve the protection effect. The inner diameter of the third sealing lip 23 is smaller than the inner diameter of the second sealing lip 22. The second sealing lip 22 and the half shaft 3 are interference fit, and the third sealing lip 23 and the half shaft 3 can be a small interference fit.
[0037] The outer ring of the oil seal 2 is press-fitted into the oil seal mounting hole of the reducer housing 4 by interference fit. When the vehicle is running, the second sealing lip 22 and the third sealing lip 23 of the oil seal 2 are in relative frictional operation with the half shaft 3. By setting the inner diameter of the third sealing lip 23 to be smaller than the inner diameter of the second sealing lip 22, it is helpful to reduce the friction resistance encountered by the half shaft 3 when it rotates.
[0038] Optionally, the oil seal 2 further includes a fourth sealing lip 24 , which is disposed between the third sealing lip 23 and the second sealing lip 22 , and an inner diameter of the fourth sealing lip 24 is smaller than an inner diameter of the third sealing lip 23 .
[0039] In this embodiment, by the above arrangement, the protection effect can be further improved while preventing the half shaft 3 from being subjected to excessive frictional resistance when rotating.
[0040] Optionally, the third sealing lip 23 is in interference fit with the half shaft 3 , and the fourth sealing lip 24 is in transition fit with the half shaft 3 .
[0041] In this embodiment, the third sealing lip 23 and the half shaft 3 can be slightly interference fit. By setting the third sealing lip 23 and the half shaft 3 to have an interference fit, and the fourth sealing lip 24 and the half shaft 3 to have a transition fit, the protection effect can be further improved while avoiding excessive friction resistance when the half shaft 3 rotates.
[0042] The embodiment of the present application further provides a vehicle, comprising a reducer according to any of the above embodiments. The vehicle can be any vehicle that needs to be equipped with a reducer, such as an off-road vehicle and a passenger car.
[0043] It should be noted that any implementation of the above-mentioned reducer embodiments can be applied to the vehicle in this embodiment and can achieve the same technical effect. To avoid repetition, it will not be described here.
[0044] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.
Claims
1. A reducer, characterized in that: Including dust covers and oil seals arranged at intervals; The dust cover comprises a first through hole, and the dust cover is sleeved on the half shaft of the reducer through the first through hole; The oil seal includes a second through hole, a first sealing lip and a second sealing lip. The oil seal is sleeved on the half shaft through the second through hole. The first sealing lip is arranged on the end surface of the oil seal facing the dust cover, and the first sealing lip extends in the direction of the dust cover and has an interference fit with the dust cover. The second sealing lip protrudes relative to the inner wall of the second through hole and has an interference fit with the half shaft of the reducer.
2. The reducer according to claim 1, characterized in that: The dust cover includes an outer ring and an inner ring forming the first through hole, and the dust cover also includes a bending portion arranged between the outer ring and the inner ring, the bending portion includes a first bending circle, a second bending circle, and a straight circle between the first bending circle and the second bending circle, the axis of the straight circle is parallel to the axis of the half shaft, and the first sealing lip is interference fit with the inner wall of the straight circle.
3. The reducer according to claim 2, characterized in that: The straight rings are straight rings with equal inner diameters.
4. The reducer according to any one of claims 1 to 3, characterized in that: An inserting portion protruding toward the oil seal is disposed around the outer ring of the dust cover, and a groove adapted to the inserting portion is disposed around the housing of the reducer, and the inserting portion is inserted into the groove.
5. The reducer according to any one of claims 1 to 3, characterized in that: The inner ring of the dust cover is surrounded by a fitting portion extending toward the oil seal, and the fitting portion fits with the half shaft.
6. The reducer according to claim 1, characterized in that: The oil seal further includes a third sealing lip, the third sealing lip protrudes relative to the inner wall of the second through hole, and the third sealing lip is closer to the dust cover than the second sealing lip.
7. The reducer according to claim 6, characterized in that: An inner diameter of the third sealing lip is smaller than an inner diameter of the second sealing lip.
8. The reducer according to claim 6 or 7, characterized in that: The oil seal further includes a fourth sealing lip, which is disposed between the third sealing lip and the second sealing lip, and an inner diameter of the fourth sealing lip is smaller than an inner diameter of the third sealing lip.
9. The reducer according to claim 8, characterized in that: The third sealing lip is interference fit with the half shaft, and the fourth sealing lip is transition fit with the half shaft.
10. A vehicle, characterized in that: A reducer comprising the reducer according to any one of claims 1 to 9.