Oil seal assembly and transmission system

Abstract

The utility model discloses an oil seal assembly and a transmission system. The oil seal assembly comprises a framework piece and a sealing piece, the oil seal main body piece is connected with the framework piece, a main lip opening part is arranged on the side, away from the framework piece, of the oil seal main body piece in the radial direction in a protruding mode, and the main lip opening part is suitable for abutting against the transmission shaft for sealing; and the inner protection lips are arranged on the oil seal main body piece and arranged on the side, facing the inner side, of the opening portion of the main lip at intervals, and the inner protection lips are arranged in a protruding mode in the radial direction towards the side away from the framework piece and are suitable for being in clearance fit with a transmission shaft so as to prevent foreign matter in inner side oil from flowing to the opening portion of the main lip. Therefore, the inner protection lip is arranged on the side, facing the inner side, of the opening portion of the main lip, the inner protection lip is matched with the transmission shaft, foreign matter in oil liquid on the inner side can be prevented from flowing to the opening portion of the main lip, the opening portion of the main lip of the oil seal body piece can be protected, damage of the foreign matter in the oil liquid to the opening portion of the main lip can be reduced, oil leakage can be effectively prevented, and the service life of the oil seal body piece is prolonged. The service life of the transmission system is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission systems, in particular to an oil seal component and a transmission system. Background Art

[0002] The oil seal assembly is a mechanical element used to seal oil. It is one of the main components in the transmission system. It mainly plays an isolation role to prevent internal oil leakage and prevent external impurities from invading the internal oil.

[0003] In the prior art, the component of the oil seal assembly that abuts against the transmission shaft and is used to seal the oil inside the assembly cavity is easily scratched by foreign matter inside the oil, thereby causing the seal between the oil seal assembly and the transmission shaft to fail, causing oil leakage from the oil seal, and shortening the service life of the oil seal assembly and the transmission system. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an oil seal assembly, which has a longer service life and a better sealing effect on oil.

[0005] The utility model further proposes a transmission system.

[0006] According to the utility model, the oil seal assembly comprises: a skeleton member; an oil seal main body member, the oil seal main body member is connected to the skeleton member, the inner ring of the oil seal main body member is suitable for being sleeved on the transmission shaft, the oil seal main body member is radially protruding toward a side away from the skeleton member to set a main lip portion, the main lip portion is suitable for abutting and sealing with the transmission shaft to prevent the oil on the inside from flowing to the outside; an inner protective lip, the inner protective lip is arranged on the oil seal main body member and is spaced apart at the side of the main lip portion facing the inside, the inner protective lip is radially protruding toward a side away from the skeleton member and is suitable for matching with the transmission shaft clearance to block foreign matter in the inner oil from flowing to the main lip portion.

[0007] Therefore, by arranging an inner protective lip on the inner side of the main lip, the cooperation between the inner protective lip and the transmission shaft can block foreign matter in the inner oil from flowing to the main lip, thereby protecting the main lip of the oil seal body, reducing the damage to the main lip caused by foreign matter in the oil, effectively preventing oil leakage, and extending the service life of the transmission system.

[0008] In some examples of the present invention, the inner protective lip is disposed on an end portion of the oil seal body adjacent to the inner side.

[0009] In some examples of the present invention, a cross-sectional area of ​​the inner protective lip gradually decreases toward a side away from the frame member in a radial direction.

[0010] In some examples of the present invention, the inner protective lip is provided with oil return lines, and the oil return lines are multiple and are arranged at intervals in the circumferential direction of the inner protective lip.

[0011] In some examples of the present invention, the inner protective lip and the oil seal main body are integrally formed structural parts.

[0012] In some examples of the present invention, a dustproof lip is provided at one end of the oil seal body adjacent to the outer side, and the dustproof lip is protruded radially toward a side away from the skeleton member and is suitable for abutting and sealing with the transmission shaft.

[0013] In some examples of the present invention, an elastic member is provided on one side of the oil seal body radially adjacent to the skeleton member, and the center of the radial projection of the elastic member is located on the side where the radial projection of the main lip portion is away from the radial projection of the inner protective lip.

[0014] According to the transmission system of the embodiment of the utility model, it includes: a transmission shaft; the oil seal assembly mentioned above, wherein the oil seal assembly is sleeved on the outside of the transmission shaft, the main lip portion is in sealing contact with the transmission shaft, and the inner protective lip is in clearance contact with the transmission shaft.

[0015] According to the transmission system of an embodiment of the utility model, an oil passage is formed between the inner protective lip and the transmission shaft, and the oil passage is suitable for blocking foreign matter in the inner oil from flowing to the main lip. The diameter of the oil passage is R, and R satisfies the relationship: 0.3mm<R<1mm.

[0016] According to the transmission system of the embodiment of the utility model, R satisfies the relationship: 0.5mm<R<0.8mm.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of an oil seal assembly according to the prior art;

[0020] Figure 2 is a schematic diagram of an oil seal assembly according to an embodiment of the utility model;

[0021] Figure 3 It is a partial schematic diagram of a transmission system according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 100. Oil seal assembly;

[0024] 10. Frame parts;

[0025] 20. Oil seal main body; 21. Main lip; 22. Dustproof lip; 23. Elastic part;

[0026] 30. Inner protective lip;

[0027] 200. Transmission system;

[0028] 40. Transmission shaft;

[0029] 50. Oil outlet. DETAILED DESCRIPTION

[0030] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0031] Reference below Figure 2-Figure 3 The oil seal assembly 100 according to the embodiment of the present invention is described. The oil seal assembly 100 can be applied to a transmission system 200 .

[0032] Combination Figure 2-Figure 3 As shown, the oil seal assembly 100 according to the utility model can mainly include: a skeleton member 10, an oil seal main body member 20 and an inner protective lip 30. Among them, the skeleton member 10 is connected to the oil seal main body member 20 at one end close to the transmission shaft 40 in the radial direction. The skeleton member 10 mainly plays the role of connection and support. It can not only connect and fix the oil seal main body member 20, but also connect and fix other components. Moreover, it can also provide a strong supporting force, so that the oil seal assembly 100 has a certain strength and rigidity.

[0033] The oil seal body 20 may mainly include: a main lip portion 21. The oil seal body 20 is suitable for being sleeved on the transmission shaft 40, and is tightly fitted with the transmission shaft 40 to ensure a certain sealing effect. Further, the oil seal body 20 is provided with a main lip portion 21 protruding toward the side away from the frame member 10 in the radial direction. The main lip portion 21 is suitable for abutting and sealing with the transmission shaft 40, and mainly plays an isolation role, which can prevent the oil inside from flowing to the outside, and can also prevent external impurities from invading the oil inside, thereby ensuring the normal operation of the transmission system 200.

[0034] The inner protective lip 30 is arranged at intervals on one end portion of the oil seal main body 20 adjacent to the inner side. The inner protective lip 30 is radially protruding toward the side away from the frame member 10 and is suitable for clearance fit with the transmission shaft 40 to block foreign matter in the inner oil from flowing to the main lip portion 21. Specifically, when the oil flows from the internal chamber to the main lip portion 21, the oil will first pass through. Through the clearance fit between the inner protective lip 30 and the transmission shaft 40, it can ensure that the oil flows from the gap to the main lip, so that foreign matter with a larger volume in the oil cannot pass through the gap, that is, it can block foreign matter with a larger volume in the oil, prevent foreign matter with a larger volume in the oil from flowing to the main lip portion 21 and scratching the main lip portion 21, so that the damage of foreign matter in the oil to the main lip portion 21 can be reduced, and the service life of the oil seal assembly 100 and the sealing effect of the oil can be improved, so that the service life of the transmission system 200 can be improved.

[0035] Combination Figure 2 and Figure 3 As shown, the inner protective lip 30 is disposed on one end portion of the oil seal main body 20 adjacent to the inner side. Specifically, the inner protective lip 30 needs to protect the main lip, and needs to face the inner side and contact the oil like the main lip 21. Therefore, the inner protective lip 30 is disposed on one end portion of the oil seal main body 20 adjacent to the inner side, which not only ensures the rationality of the structure of the oil seal assembly 100, but also meets subsequent requirements.

[0036] Combination Figure 2 and Figure 3 As shown, the cross-sectional area of ​​the inner protective lip 30 gradually decreases in the radial direction toward the side away from the frame member 10. Specifically, gradually decreasing the cross-sectional area of ​​the inner protective lip 30 in the radial direction toward the side away from the frame member 10 can guide the flow of the oil, and can facilitate the oil to be guided to the gap between the inner protective lip 30 and the transmission shaft 40, so that the setting of the inner protective lip 30 can be prevented from affecting the flow of the oil and reducing the lubricating effect of the oil, while ensuring the barrier effect of the gap between the inner protective lip 30 and the transmission shaft 40 on larger foreign objects in the oil, thereby ensuring the flow and lubrication effect of the oil.

[0037] Combination Figure 2 and Figure 3 As shown, the inner protective lip 30 is provided with oil return lines, and the oil return lines are multiple and are arranged at intervals in the circumferential direction of the inner protective lip 30. Specifically, by arranging multiple oil return lines at intervals in the circumferential direction of the inner protective lip 30, the oil return lines can be diagonal lines or protrusions, which can not only enhance the blocking effect on foreign matter in the oil, but also play a certain buffering role, which can reduce the pressure of the oil on the main lip portion 21, thereby better protecting the main lip portion 21.

[0038] Combination Figure 2 and Figure 3 As shown, the inner protective lip 30 and the oil seal body 20 are integrally formed structural members. Specifically, the inner protective lip 30 is provided at one end of the oil seal body 20 adjacent to the inner side, the inner protective lip 30 is connected to the oil seal body 20, and the inner protective lip 30 and the oil seal body 20 are integrally formed structural members, which can not only ensure the firmness and stability of the structure of the oil seal assembly 100, but also simplify the production process of the oil seal assembly 100.

[0039] Combination Figure 2 and Figure 3 As shown, a dustproof lip 22 is provided at one end of the oil seal main body 20 adjacent to the outside, and the dustproof lip 22 is protruded toward the side away from the frame member 10 in the radial direction and is suitable for abutting and sealing with the transmission shaft 40. Specifically, the dustproof lip 22 is provided at one end of the oil seal main body 20 adjacent to the outside, and forms an integrally formed structural member with the main lip portion 21 and the inner protective lip 30, and the dustproof lip 22 is protruded toward the side away from the frame member 10 in the radial direction, so that it is closely fitted with the transmission shaft 40 to play a sealing role, which can prevent external dust, impurities and pollutants from invading the oil, and can also prevent external foreign matter from contacting the main lip portion 21, so as to protect the main lip portion 21, and further, the service life of the oil seal assembly 100 can be extended.

[0040] Combination Figure 2 and Figure 3 As shown, an elastic member 23 is provided on one side of the oil seal main body 20 radially adjacent to the frame member 10, and the center of the radial projection of the elastic member 23 is located on the side where the radial projection of the main lip portion 21 is away from the radial projection of the inner protective lip 30. Specifically, by arranging the elastic member 23 on the side of the oil seal main body 20 radially adjacent to the frame member 10, the elastic member 23 can press the main lip portion 21 and the dustproof lip portion 22 of the oil seal main body 20 against the shaft wall of the transmission shaft 40, and can maintain the stability of the pressure of the main lip portion 21 and the dustproof lip portion 22 of the oil seal assembly 100 on the transmission shaft 40, which can improve the sealing performance of the oil seal assembly 100 and prevent oil leakage. In addition, the presence of the elastic member 23 can also balance the pressure on the oil seal assembly 100, maintain the stability of the oil seal assembly 100, and optimize the structure of the oil seal assembly 100.

[0041] Furthermore, the center of the radial projection of the elastic member 23 is located on the side of the radial projection of the main lip portion 21 away from the radial projection of the inner protective lip 30 , which can further enhance the abutment sealing effect between the main lip portion 21 and the transmission shaft 40 .

[0042] In some embodiments of the present invention, the surface of the elastic member 23 should also be specially treated to improve its corrosion resistance and wear resistance.

[0043] Combination Figure 3 As shown, the transmission system 200 according to the utility model can mainly include: a transmission shaft 40 and the above-mentioned oil seal assembly 100. The oil seal assembly 100 is sleeved on the outer side of the transmission shaft 40, the main lip portion 21 is in sealing contact with the transmission shaft 40, and the inner protective lip 30 is in clearance contact with the transmission shaft 40. Specifically, the oil seal assembly 100 is sleeved on the outer side of the transmission shaft 40, and together with the transmission shaft 40, it forms the transmission system 200. When the transmission system 200 is running, the oil seal assembly 100 can reduce the friction force on the transmission shaft 40 due to rotation, thereby reducing the wear of the transmission shaft 40. Furthermore, the main lip portion 21 of the oil seal assembly 100 fits tightly with the transmission shaft 40 to form a sealed environment, which can effectively prevent oil leakage.

[0044] In addition, in order to prevent foreign matter in the oil from damaging the main lip portion 21 when the oil flows toward the main lip portion 21, an inner protective lip 30 is provided on the inner side of the main lip portion 21. The inner protective lip 30 is clearance-matched with the transmission shaft 40 to block some foreign matter in the oil and provide a certain degree of protection for the main lip portion 21.

[0045] Combination Figure 3 As shown, according to the transmission system 200 of the utility model, an oil passage 50 is formed between the inner protective lip 30 and the transmission shaft 40. The oil passage 50 is suitable for blocking foreign matter in the inner oil from flowing to the main lip. The diameter of the oil passage 50 is R, and R satisfies the relationship: 0.3mm<R<1mm. Specifically, a gap is provided between the inner protective lip 30 and the transmission shaft 40 to form the oil passage 50, which can prevent the main lip portion 21 from directly contacting the oil. The oil passage 50 mainly plays a blocking role, which can block some foreign matter in the oil to reduce the damage to the main lip caused by foreign matter in the oil. It can also play a certain buffering role, which can reduce the pressure on the main lip, thereby playing a more effective protective role for the main lip portion 21.

[0046] In addition, the diameter of the oil port 50 should be neither too large nor too small. If the diameter of the oil port 50 is too large, it will affect the blocking effect of foreign matter. If the diameter of the oil port 50 is too small, it will affect the speed of oil passing through, causing the inner protective lip 30 to be severely compressed, and then destroying the overall structure of the transmission system 200. Therefore, the diameter of the oil port 50 should be controlled between 0.3mm and 1mm. This setting can make the structure of the transmission system 200 more reasonable.

[0047] Combination Figure 3As shown, according to the transmission system 200 of the present invention, R satisfies the relationship: 0.5mm<R<0.8mm. Specifically, the diameter of the oil port 50 in the transmission system 200 can be further accurately and optimally designed, that is, the diameter of the oil port 50 is set to be controlled between 0.5mm and 0.8mm, so that the structure of the transmission system 200 can be further optimized.

[0048] The transmission system 200 of the utility model has a stable structure and good working performance and running state, which is better than the application Figure 1 The transmission system 200 with a medium oil seal structure has better sealing performance, longer service life, and better meets industry needs.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and the description of Simple 7, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 expressions of the above terms do not necessarily refer to the same embodiment or example.

[0051] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An oil seal assembly, characterized in that: include: Frame parts; An oil seal main body, the oil seal main body is connected to the frame member, the oil seal main body is suitable for being sleeved on the transmission shaft, the oil seal main body is radially protruding toward a side away from the frame member to provide a main lip portion, the main lip portion is suitable for abutting and sealing with the transmission shaft to prevent the oil inside from flowing to the outside; An inner protective lip, the inner protective lip is arranged on the oil seal main body and is spaced apart on the inner side of the main lip portion, the inner protective lip is protruded in the radial direction toward the side away from the frame member and is suitable for matching with the transmission shaft clearance to prevent foreign matter in the inner oil from flowing to the main lip portion; A plurality of oil return lines are arranged at intervals in the circumferential direction of the inner protective lip, and the oil return lines are diagonal lines or protrusions.

2. The oil seal assembly according to claim 1, characterized in that: The inner protective lip is arranged on an end portion of the oil seal main body adjacent to the inner side.

3. The oil seal assembly according to claim 1, characterized in that: The cross-sectional area of ​​the inner protective lip gradually decreases toward a side away from the frame member in the radial direction.

4. The oil seal assembly according to claim 1, characterized in that: The inner protective lip and the oil seal main body are integrally formed structural parts.

5. The oil seal assembly according to claim 1, characterized in that: A dustproof lip is arranged at one end of the oil seal main body adjacent to the outer side. The dustproof lip is protruded radially toward a side away from the frame member and is suitable for abutting and sealing with the transmission shaft.

6. The oil seal assembly according to claim 1, characterized in that: An elastic member is disposed on one side of the oil seal body member radially adjacent to the framework member, and a center of a radial projection of the elastic member is located on a side where a radial projection of the main lip portion is away from a radial projection of the inner protective lip.

7. A transmission system, characterized in that: include: transmission shaft; The oil seal assembly according to any one of claims 1 to 6, wherein the oil seal assembly is sleeved on the outer side of the transmission shaft, the main lip portion is in abutment and sealing cooperation with the transmission shaft, and the inner protective lip is in clearance cooperation with the transmission shaft.

8. The transmission system according to claim 7, characterized in that: An oil passage is formed between the inner protective lip and the transmission shaft, and the oil passage is suitable for blocking foreign matter in the inner oil from flowing toward the main lip. The diameter of the oil passage is R, and R satisfies the relationship: 0.3mm<R<1mm.

9. The transmission system according to claim 8, characterized in that: R satisfies the relationship: 0.5mm<R<0.8mm.

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