Structure for preventing oil seal from inclining

Abstract

The utility model provides an oil seal inclination prevention structure which comprises a shell, a shaft body and an oil seal matched with the shaft body, a mounting hole is formed in the shell, one end of the mounting hole is provided with the oil seal in a pressing mode, and the other end of the mounting hole extends inwards in the radial direction to form a blocking part. The oil seal comprises a first abutting ring and a second abutting ring connected with the first abutting ring, the circumferential surface of the first abutting ring abuts against the inner wall of the mounting hole, the second abutting ring abuts against the circumferential surface of the shaft body, a gap space is formed between the first abutting ring and the blocking part, and the second abutting ring abuts against the inner wall of the mounting hole. And one end, far away from the inner wall of the mounting hole, of the blocking part exceeds the first abutting ring, so that the oil seal is limited. The oil seal inclination prevention structure can avoid the oil leakage problem caused by the inclination phenomenon after the oil seal is abraded, the sealing reliability of the oil seal is improved, and normal use of a vehicle speed reducer is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to an anti-oil seal tilting structure. Background Art

[0002] With the rapid development of electric vehicles, the reducers used in electric vehicles have increasingly higher requirements for the dustproof and sealing performance of the oil seals.

[0003] The input and output ends of the reducer used in electric vehicles are equipped with oil seals. During the use of the reducer, the oil seals can protect the bearings of the reducer and prevent oil leakage, thereby ensuring the normal use of the reducer oil. However, after long-term use, the oil seals at the input and output ends of the reducer will wear due to the rotation coordination with the input shaft and output shaft. If the worn oil seals continue to be used, they will tilt, and the dustproof and sealing properties of the oil seals will be greatly reduced, and even cause oil leakage, seriously affecting the normal use of the reducer. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide an anti-oil seal tilting structure, which aims to solve the problem that the existing oil seal tilts due to wear after long-term use, the dustproof and sealing properties of the oil seal are greatly reduced, and even oil leakage may occur, seriously affecting the normal use of the reducer.

[0005] The utility model aims to provide an anti-oil seal tilting structure, comprising a housing, a shaft and an oil seal adapted to the shaft, wherein the housing is provided with a mounting hole, one end of the mounting hole is press-fitted with the oil seal, and the other end of the mounting hole extends a blocking portion radially inward;

[0006] The oil seal includes a first abutment ring and a second abutment ring connected to the first abutment ring, the circumferential surface of the first abutment ring abuts against the inner wall of the mounting hole, the second abutment ring abuts against the circumferential surface of the shaft body, a gap space is provided between the first abutment ring and the blocking portion, and one end of the blocking portion away from the inner wall of the mounting hole exceeds the first abutment ring to limit the oil seal.

[0007] Compared with the prior art, the beneficial effect of the anti-oil seal tilting structure of the utility model is that a blocking part is provided at one end of the mounting hole of the shell, and the first abutment ring in the oil seal is limited by the blocking part, so as to limit the oil seal, avoid oil leakage caused by tilting of the oil seal after wear, improve the sealing reliability of the oil seal, and thus ensure the normal use of the vehicle reducer.

[0008] In addition, the above-mentioned oil-proof seal tilting structure of the utility model can also have the following additional technical features:

[0009] Furthermore, in the axial direction of the mounting hole, the length of the gap space ranges from 0.5 mm to 1 mm.

[0010] Furthermore, the blocking portion has a rounded edge on a side away from the first abutting ring.

[0011] Furthermore, the diameter of the mounting hole is consistent with the outer diameter of the first abutment ring.

[0012] Furthermore, the second abutment ring is provided with a first dustproof lip at one end away from the blocking portion, and the second abutment ring is provided with a sealing lip at one end close to the blocking portion, and the second abutment ring abuts against the circumferential surface of the shaft body through the first dustproof lip and the sealing lip.

[0013] Furthermore, a second dustproof lip is provided on the second abutting ring, and the second dustproof lip is located between the first dustproof lip and the sealing lip.

[0014] Furthermore, the first dustproof lip and the second dustproof lip are both arranged to be inclined toward a side away from the sealing lip.

[0015] Furthermore, a spring ring is sleeved on a side of the second abutting ring away from the sealing lip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of the oil-proof seal tilting structure of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of the structure at center.

[0018] Among them, the above-mentioned drawings include the following figure marks: 1-housing; 11-mounting hole; 12-blocking part; 2-shaft body; 3-oil seal; 31-first abutment ring; 32-second abutment ring; 321-first dustproof lip; 322-sealing lip; 323-second dustproof lip; 33-spring ring.

[0019] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] See also Figure 1 to Figure 2 The anti-oil seal tilting structure of the utility model comprises a housing 1, a shaft body 2 and an oil seal 3 adapted to the shaft body 2, wherein the housing 1 is a gearbox housing, a mounting hole 11 is provided on the housing 1, the aperture of the mounting hole 11 is consistent with the outer diameter of the oil seal 3, the shaft body 2 is a connecting shaft on the differential housing, the connecting shaft is inserted into the mounting hole 11, and the sealing between the mounting hole 11 and the peripheral surface of the shaft body 2 is realized by the oil seal 3.

[0024] Furthermore, an oil seal 3 is pressed into one end of the mounting hole 11, and a blocking portion 12 is provided at the other end of the mounting hole 11. Specifically, an oil seal 3 is provided at one end of the mounting hole 11 close to the port of the shaft body 2, and a blocking portion 12 is radially extended inward from the inner wall of the end of the mounting hole 11 away from the port of the shaft body 2. The cross-section of the blocking portion 12 is a circular ring, and the blocking portion 12 is provided to limit the oil seal 3.

[0025] Furthermore, the oil seal 3 includes a first abutment ring 31 and a second abutment ring 32 connected to the first abutment ring 31, the outer diameter of the first abutment ring 31 is consistent with the aperture of the mounting hole 11, the circumferential surface of the first abutment ring 31 abuts against the inner wall of the mounting hole 11, the second abutment ring 32 abuts against the circumferential surface of the shaft body 2, and a gap space is provided between the first abutment ring 31 and the blocking portion 12 to avoid affecting the lubrication of the oil seal by the lubricating oil. In the axial direction of the mounting hole, the length d of the gap space ranges from 0.5 mm to 1 mm. In a preferred embodiment, the length d of the gap space between the first abutment ring 31 and the blocking portion 12 is 0.7 mm.

[0026] Furthermore, one end of the blocking portion 12 away from the inner wall of the mounting hole 11 exceeds the first abutting ring 31. In other words, in the radial direction of the mounting hole 11, the length of the blocking portion 12 is greater than the thickness of the first abutting ring 31, so that the blocking portion 12 can limit the oil seal 3. The blocking portion 12 is provided with a rounded edge on one side away from the first abutting ring 31.

[0027] It can be understood that the setting of the blocking portion 12 can also form an oil dripping path between the first abutment ring 31 and the second abutment ring 32 on the oil seal 3. During actual use, the lubricating oil flows from the end of the second abutment ring 32 close to the blocking portion 12, along the ring wall of the second abutment ring 32 and the first abutment ring 31, and gradually flows back to the end of the first abutment ring 31 close to the blocking portion 12, and finally gathers and drips onto the shaft body 2 under the blocking action of the blocking portion 12, thereby achieving lubrication of the shaft body 2.

[0028] In this embodiment, the second abutment ring 32 is provided with a first dustproof lip 321 at the end away from the blocking portion 12, and the second abutment ring 32 is provided with a sealing lip 322 at the end close to the blocking portion 12. The end of the sealing lip 322 away from the first abutment ring 31 is set as a pointed end, and the second abutment ring 32 abuts against the circumferential surface of the shaft body 2 through the first dustproof lip 321 and the sealing lip 322.

[0029] Furthermore, a second dustproof lip 323 is provided on the second abutting ring 32, and the second dustproof lip 323 is located between the first dustproof lip 321 and the sealing lip 322 to further provide dustproof effect for the oil seal 3. The first dustproof lip 321 and the second dustproof lip 323 are both inclined toward the side away from the sealing lip 322, and the end of the first dustproof lip 321 away from the first abutting ring 31 is longer than the end of the second dustproof lip 323 away from the first abutting ring 13. In actual use, the first dustproof lip 321 blocks external dust. When the surface of the first dustproof lip 321 is worn and causes external dust to fall, the second dustproof lip 323 can block again to reduce the probability of the sealing lip 322 contacting external dust, thereby increasing the service life of the oil seal 3.

[0030] Furthermore, the second abutment ring 32 is sleeved with a spring ring 33 on the side away from the sealing lip 322. In the present embodiment, an annular groove is provided on the side of the second abutment ring 32 away from the sealing lip 322 and at one end close to the blocking portion 12. The spring ring 33 is embedded in the annular groove to ensure the self-tightening force of the oil seal 3, thereby improving the sealing performance of the oil seal 3.

[0031] In summary, the beneficial effect of the oil seal tilting prevention structure of the utility model is that by setting a blocking portion at one end of the mounting hole of the housing, the blocking portion limits the first abutment ring in the oil seal, thereby limiting the oil seal, avoiding oil leakage caused by tilting after the oil seal is worn, improving the sealing reliability of the oil seal, and ensuring the normal use of the reducer. Furthermore, by adding a second dustproof lip between the first dustproof lip and the sealing lip on the oil seal, the dustproofness and service life of the oil seal are improved.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", 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 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.

[0033] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An anti-oil seal tilting structure, comprising a housing, a shaft and an oil seal adapted to the shaft, characterized in that: The housing is provided with a mounting hole, one end of which is press-fitted with the oil seal, and the other end of which is radially inwardly extending a blocking portion; The oil seal includes a first abutment ring and a second abutment ring connected to the first abutment ring, the circumferential surface of the first abutment ring abuts against the inner wall of the mounting hole, the second abutment ring abuts against the circumferential surface of the shaft body, a gap space is provided between the first abutment ring and the blocking portion, and one end of the blocking portion away from the inner wall of the mounting hole exceeds the first abutment ring to limit the oil seal.

2. The oil seal anti-tilting structure according to claim 1, characterized in that: In the axial direction of the mounting hole, the length of the gap space ranges from 0.5 mm to 1 mm.

3. The oil seal anti-tilting structure according to claim 1, characterized in that: The blocking portion has a rounded edge at a side away from the first abutting ring.

4. The oil seal anti-tilting structure according to claim 1, characterized in that: The diameter of the mounting hole is consistent with the outer diameter of the first abutment ring.

5. The oil seal anti-tilting structure according to claim 1, characterized in that: The second abutment ring is provided with a first dustproof lip at one end away from the blocking portion, and a sealing lip at one end close to the blocking portion. The second abutment ring abuts against the circumferential surface of the shaft body through the first dustproof lip and the sealing lip.

6. The oil seal anti-tilting structure according to claim 5, characterized in that: The second abutting ring is also provided with a second dustproof lip, and the second dustproof lip is located between the first dustproof lip and the sealing lip.

7. The oil seal anti-tilting structure according to claim 6, characterized in that: The first dustproof lip and the second dustproof lip are both arranged to be inclined toward a side away from the sealing lip.

8. The oil seal anti-tilting structure according to claim 5, characterized in that: The second abutting ring is sleeved with a spring ring on a side away from the sealing lip.

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