Ultrahigh-eccentricity-resistant bidirectional oil seal for rotating shaft

Abstract

The utility model discloses an ultrahigh-eccentricity-resistant oil seal for a bidirectional rotating shaft. The ultrahigh-eccentricity-resistant oil seal comprises a metal framework and an ultrahigh rubber elastic body, the metal framework is bonded to the ultrahigh rubber elastic body through vulcanization, a lip piece is arranged on the ultrahigh rubber elastic body, a spring groove is formed in the ultrahigh rubber elastic body, meanwhile, a metal spring is assembled in the spring groove, and due to the external structural design of the ultrahigh rubber elastic body and the rigid supporting effect of the metal framework, the rigidity of the ultrahigh rubber elastic body is improved. The lip piece is bonded on the ultrahigh rubber elastic body in a vulcanization mode, the lip piece is made of polytetrafluoroethylene materials, and the ultrahigh rubber elastic body is made of rubber materials. According to the ultrahigh-eccentricity-resistant bidirectional oil seal for the rotating shaft, the ultrahigh rubber elastic body and the metal framework are connected through vulcanization, the problem of damage caused by abrasion during later use is solved, the overall connection sealing performance is greatly improved through the arranged lip piece, the problem that sealing force is insufficient easily caused by single-point sealing is solved, and the problem of oil seal leakage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field related to oil seals, in particular to an oil seal for a bidirectional rotating shaft resistant to ultra-high eccentricity. Background Art

[0002] Automobile half shafts are common parts of motor vehicles, and the dynamic and static sealing performance of half shaft oil seals play a vital role in the service life of shock absorbers. However, the existing ultra-high eccentricity-resistant bidirectional rotating shaft oil seals still have certain defects when used, such as;

[0003] For example, an ultra-high pressure, high-speed, bidirectional rotating shaft oil seal with publication number CN221120908U comprises: a first supporting skeleton, the inner side of which is coated with a sealing structure; a second supporting skeleton is sleeved on the bottom of the sealing structure, the first supporting skeleton and the second supporting skeleton cooperate with each other, an annular spring is sleeved on the inner side of the sealing structure, and the annular spring is sleeved on the sealing structure to facilitate elastic extrusion of the sealing structure so that the sealing lip can be tightly sealed against the shaft body, a plurality of anti-falling structures are arranged in an annular array on the outside of the annular spring, the anti-falling structure is installed inside the sealing structure, and the anti-falling structure is used to limit the position of the annular spring, and a single-point sealing of the shaft body is achieved by the fitting sealing between a single sealing lip and the shaft body by utilizing the setting mode in which the first supporting skeleton and the sealing structure cooperate. This sealing mode has a low friction coefficient, low heat generation, is not easy to cause early hardening of the lip, and has a longer service life.

[0004] However, the ultra-high pressure, high speed, bidirectional rotating shaft oil seal still has the following disadvantages in actual use:

[0005] Through the fit seal between a single sealing lip and the shaft body, in actual use, the single-point sealing of the shaft body is prone to insufficient sealing force, which will cause leakage of the oil seal. After high-speed operation, the oil seal is prone to fall out, and the sealing lip of the oil seal is easily worn, which leads to a reduction in the overall service life.

[0006] In view of the above problems, it is urgent to carry out innovative design based on the original oil seal for bidirectional rotating shaft resistant to ultra-high eccentricity. Therefore, we proposed an oil seal for bidirectional rotating shaft resistant to ultra-high eccentricity that can solve the above problems well. Utility Model Content

[0007] The purpose of the utility model is to provide an oil seal for a bidirectional rotating shaft that is resistant to ultra-high eccentricity, so as to solve the problem raised by the above-mentioned background technology that in the current market, a single sealing lip and a shaft body are used for fitting sealing. During actual use, the single-point sealing of the shaft body is prone to insufficient sealing force, thereby causing leakage of the oil seal. After high-speed operation, the oil seal is prone to fall out, and the sealing lip of the oil seal is easily subject to wear, thereby reducing the overall service life.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil seal for a bidirectional rotating shaft resistant to ultra-high eccentricity, comprising a metal skeleton and an ultra-high rubber elastic body;

[0009] The metal skeleton is bonded to the ultra-high rubber elastomer by vulcanization. A lip is arranged on the ultra-high rubber elastomer. The ultra-high rubber elastomer is made of rubber. The ultra-high rubber elastomer and the metal skeleton are connected by vulcanization, so that the structure has excellent anti-deviation performance and reduces the damage caused by wear and tear during later use.

[0010] Preferably, a spring groove is provided on the ultra-high rubber elastomer, and a metal spring is installed in the spring groove. The metal spring is convenient for installation and use, and the overall sealing performance is greatly improved. After 1008 hours of bench durability test at a rotation speed of 6000rpm and an eccentricity of 1.2mm, the sealing is good, and no obvious wear is found on the oil seal lip after the test, so the overall sealing performance is excellent.

[0011] Preferably, the external structural design of the ultra-high rubber elastomer is connected with the rigid support of the metal skeleton to achieve a durable outer diameter static sealing effect.

[0012] Preferably, the lip is vulcanized and bonded to the ultra-high rubber elastomer to extend the service life of the oil seal.

[0013] Preferably, the lip piece is made of polytetrafluoroethylene, and the ultra-high rubber elastomer is made of rubber. The lip piece is made of polytetrafluoroethylene. The polytetrafluoroethylene material can effectively reduce the wear caused by friction between the shaft and the oil seal during contact, and extend the service life of the oil seal. The polytetrafluoroethylene material has good corrosion resistance and sealing performance, and can effectively prevent lubricating oil or liquid from leaking from the shaft seal, maintaining the lubrication effect and operational safety inside the equipment. The ultra-high rubber elastomer is made of rubber. The rubber material is soft and has good elasticity, and can effectively adapt to the slight unevenness of the shaft surface, thereby providing excellent sealing effect, preventing lubricating oil or liquid leakage, and the overall cost is low, and maintenance is convenient.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the oil seal for the ultra-high eccentric bidirectional rotating shaft connects the ultra-high rubber elastic body and the metal frame by vulcanization, which reduces the damage caused by wear during later use, and the lip piece is provided to greatly improve the overall connection sealing, reduce the problem of insufficient sealing force caused by single-point sealing, and reduce the oil seal leakage problem. The specific contents are as follows:

[0015] (1) The ultra-high rubber elastomer and the metal frame are connected by vulcanization, which makes the structure extremely resistant to deviation, reducing the damage caused by wear during later use. The lip piece greatly improves the sealing of the overall connection, reducing the problem of insufficient sealing force caused by single-point sealing;

[0016] (2) The lip is made of polytetrafluoroethylene, which can effectively reduce the wear caused by friction between the shaft and the oil seal, reducing the problem of reduced service life of the oil seal due to wear. In addition, the lip made of polytetrafluoroethylene can effectively prevent lubricating oil or liquid from leaking from the shaft seal, thereby improving the overall safety of operation;

[0017] (3) The ultra-high rubber elastomer is made of rubber. Since the rubber material is soft and has good elasticity, it can provide excellent sealing effect to prevent leakage of lubricating oil or liquid, and the overall cost is low and maintenance is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] In the figure: 1. Metal frame; 2. Ultra-high rubber elastomer; 3. Lip; 4. Metal spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] In this embodiment, in order to improve the overall service life, the lip 3 is vulcanized and bonded to the ultra-high rubber elastic body 2, thereby reducing the problem of reduced service life due to wear. Figure 1The technical solution shown includes a metal skeleton 1 and an ultra-high rubber elastomer 2. The metal skeleton 1 is bonded to the ultra-high rubber elastomer 2 by vulcanization. A lip piece 3 is provided on the ultra-high rubber elastomer 2. A spring groove is provided on the ultra-high rubber elastomer 2. A metal spring 4 is installed in the spring groove. The external structural design of the ultra-high rubber elastomer 2 is connected with the rigid support of the metal skeleton 1 to achieve a durable outer diameter static sealing effect. The lip piece 3 is vulcanized and bonded to the ultra-high rubber elastomer 2 to extend the service life of the oil seal. The lip piece 3 is made of polytetrafluoroethylene, and the ultra-high rubber elastomer 2 is made of rubber. The ultra-high rubber elastomer 2 and the metal skeleton 1 are connected by vulcanization, so that the structure has excellent anti-bias performance, which reduces the damage caused by wear during later use. The lip piece 3 is also connected by vulcanization, which greatly improves the overall connection sealing, reduces the problem of insufficient sealing force easily caused by single-point sealing, and reduces the oil seal leakage problem. The metal spring 4 is convenient for installation After installation and use, the overall sealing is greatly improved, and after 1008 hours, a rotation speed of 6000rpm, and an eccentricity of 1.2mm bench durability test, the sealing is good, and there is no obvious wear on the oil seal lip 3 after the test, so the overall sealing performance is excellent. The lip 3 is made of polytetrafluoroethylene. The polytetrafluoroethylene material can effectively reduce the wear caused by the friction between the shaft and the oil seal, and extend the service life of the oil seal. The polytetrafluoroethylene material has good corrosion resistance and sealing performance, and can effectively prevent lubricating oil or liquid from leaking from the shaft seal, maintaining the lubrication effect and operational safety inside the equipment. The ultra-high rubber elastomer 2 is made of rubber. The rubber material is soft and has good elasticity, and can effectively adapt to the slight unevenness of the shaft surface, thereby providing excellent sealing effect, preventing lubricating oil or liquid leakage, and the overall cost is low, and maintenance is convenient. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil seal for a bidirectional rotating shaft resistant to ultra-high eccentricity, comprising a metal frame (1) and an ultra-high rubber elastic body (2); It is characterized in that Also includes: The metal skeleton (1) is bonded to the ultra-high rubber elastic body (2) by vulcanization, and the ultra-high rubber elastic body (2) is provided with a lip piece (3).

2. The oil seal for a bidirectional rotating shaft resistant to ultra-high eccentricity according to claim 1, characterized in that: The ultra-high rubber elastic body (2) is provided with a spring groove, and a metal spring (4) is installed in the spring groove.

3. The oil seal for a bidirectional rotating shaft resistant to ultra-high eccentricity according to claim 1, characterized in that: The external structural design of the ultra-high rubber elastic body (2) is connected to the rigid support of the metal skeleton (1).

4. The oil seal for a bidirectional rotating shaft resistant to ultra-high eccentricity according to claim 1, characterized in that: The lip piece (3) is vulcanized and bonded to the ultra-high rubber elastic body (2), thereby extending the service life of the oil seal.

5. The oil seal for a bidirectional rotating shaft resistant to ultra-high eccentricity according to claim 1, characterized in that: The lip piece (3) is made of polytetrafluoroethylene, and the ultra-high rubber elastic body (2) is made of rubber.

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