Crankshaft oil seal assembly

Abstract

The utility model discloses a crankshaft oil seal assembly which comprises a main body module. The main body module comprises a framework, an oil seal main body fixedly connected to the outer side of the framework in a sleeving mode, a dustproof lip arranged on the inner side of the oil seal main body, a sealing lip arranged on the inner side of the oil seal main body, a partition lip arranged on the inner side of the oil seal main body and located between the dustproof lip and the sealing lip, and a first hoop spring and a second hoop spring which are arranged in the oil seal main body and surround the oil seal main body. The cross section of the framework is in an L shape, the framework is made of stainless steel materials and used for installing the oil seal body, the overall structural strength of the oil seal body is guaranteed, the oil seal body is fixedly connected to the outer side of the framework in a sleeving mode, the framework is made of fluororubber, and the oil seal body is made of fluororubber. The crankshaft oil seal assembly has the advantages of being high in sealing performance and practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, in particular to a crankshaft oil seal assembly. Background Art

[0002] Reducing the friction loss of engine components to improve the fuel economy of the vehicle is one of the main trends in the future development of the engine. The function of the crankshaft oil seal is to seal the lubricating oil inside the engine.

[0003] The existing crankshaft oil seal assembly has the following main drawbacks during use: as the engine runs, the lip of the oil seal and the matching journal are constantly worn, resulting in reduced sealing between the lip and the journal, and lubricating oil is easy to leak out. Therefore, there is room for improvement. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted by the utility model is: a crankshaft oil seal assembly, comprising: a main body module, the main body module comprising a skeleton, an oil seal body fixedly sleeved on the outside of the skeleton, a dust lip arranged on the inner side of the oil seal body, a sealing lip arranged on the inner side of the oil seal body, a partition lip arranged on the inner side of the oil seal body and located between the dust lip and the sealing lip, a first hoop spring and a second hoop spring arranged in the oil seal body and surrounding the oil seal body, a lubricating coating arranged on the outer sides of the sealing lip, the partition lip and the dust lip, and a scraper fixed in an annular array on one side of the dust lip.

[0006] In a preferred example, the present invention can be further configured as follows: the center of the first hoop spring and the center of the sealing lip are located on the same vertical plane.

[0007] In a preferred example, the present invention can be further configured as follows: the center of the second hoop spring and the center of the partition lip are located on the same vertical plane.

[0008] In a preferred example, the utility model can be further configured as follows: the frame is made of stainless steel.

[0009] In a preferred example, the utility model can be further configured as follows: the oil seal body, the sealing lip, the partition lip and the scraper are all made of fluororubber.

[0010] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0011] 1. In the utility model, a dustproof lip is arranged on one side of the sealing lip on the oil seal body to prevent dust and impurities from entering the fitting position of the sealing lip and the shaft neck. At the same time, a partition lip is arranged between the sealing lip and the dustproof lip, and a second hoop spring is sleeved above the partition lip in the oil seal body. The partition lip is made to be close to the surface of the shaft neck through the second hoop spring. At the same time, through the arrangement of the partition lip, when the sealing lip or the dustproof lip fails to seal, the partition lip can still play a sealing role, thereby preventing the leakage of lubricating oil after the sealing lip fails, thereby increasing the practical performance.

[0012] 2. In the utility model, a plurality of scrapers are arranged in a circular array on one side of the dust lip, and the scrapers are closely attached to the surface of the journal. Through the arrangement of the scrapers, dust and impurities attached to the journal near the dust lip can be scraped off, thereby ensuring the cleanliness of the dust lip and the journal, avoiding the increase of friction between the dust lip and the journal due to dust and impurities, and further improving the practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 This is a structural schematic diagram of another viewing angle of the utility model;

[0015] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.

[0017] Reference numerals:

[0018] 100. Main body module; 110. Frame; 120. Oil seal body; 130. Dustproof lip; 140. Sealing lip; 150. Partition lip; 160. First hoop spring; 170. Second hoop spring; 180. Lubricating coating; 190. Scraper. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0020] Some embodiments of the present invention are described below in conjunction with the accompanying drawings. Embodiment 1

[0021] Combination Figures 1-4 As shown, this embodiment provides a crankshaft oil seal assembly, including: a main body module 100.

[0022] The main body module 100 includes a skeleton 110, an oil seal body 120 fixedly sleeved on the outside of the skeleton 110, a dust lip 130 arranged on the inner side of the oil seal body 120, a sealing lip 140 arranged on the inner side of the oil seal body 120, a partition lip 150 arranged on the inner side of the oil seal body 120 and located between the dust lip 130 and the sealing lip 140, a first hoop spring 160 and a second hoop spring 170 arranged in the oil seal body 120 and surrounding the oil seal body 120, a lubricating coating 180 arranged on the outer sides of the sealing lip 140, the partition lip 150, and the dust lip 130, and a scraper 190 fixed integrally on one side of the dust lip 130 in a ring array.

[0023] The skeleton 110 has an L-shaped cross section and is made of stainless steel. It is used to install the oil seal body 120 to ensure the overall structural strength of the oil seal body 120. The oil seal body 120 is fixedly sleeved on the outside of the skeleton 110 and is made of fluororubber.

[0024] The sealing lip 140 is integrally arranged on the inner side of the oil seal body 120, and is made of the same material as the oil seal body 120, and has an interference fit with the shaft neck to ensure the sealing performance between the shaft neck. The center of the first hoop spring 160 and the center of the sealing lip 140 are located on the same vertical plane, so that the sealing lip 140 can be tightly attached to the outer surface of the shaft neck to ensure the sealing performance.

[0025] The dustproof lip 130 is arranged and has an interference fit with the shaft neck to prevent external dust and impurities from entering the connection between the sealing lip 140 and the shaft neck. The scraper 190 is arranged in a ring array on one side of the dustproof lip 130. Through the arrangement of the scraper 190, when the shaft neck rotates, the scraper 190 can scrape off the dust and impurities attached to the dustproof lip 130 on the shaft neck, thereby ensuring that the dustproof lip 130 and the area near the shaft neck are clean.

[0026] The partition lip 150 is arranged between the sealing lip 140 and the dustproof lip 130 as a reserve seal. When the sealing lip 140 or the dustproof lip 130 fails, the partition lip 150 can still play a sealing role to avoid the leakage of lubricating oil after the sealing lip 140 fails. At the same time, the center of the second hoop spring 170 and the center of the partition lip 150 are located on the same vertical plane to ensure that the partition lip 150 can be tightly attached to the surface of the shaft neck.

[0027] The lubricating coating 180 is applied on the outer surfaces of the sealing lip 140 , the partition lip 150 and the dustproof lip 130 , which can reduce the friction coefficient between them and the journal, thereby reducing the wear of the sealing lip 140 , the partition lip 150 and the dustproof lip 130 and extending their service life.

[0028] The working principle and use process of the utility model are as follows: when in use, the oil seal assembly is installed, and the sealing lip 140, the partition lip 150, and the dustproof lip 130 are evenly interference-fitted with the shaft neck. The sealing lip 140 can ensure that the lubricating oil will not leak out, and the dustproof lip 130 can effectively prevent dust and prevent dust from entering the vicinity of the sealing lip 140, thereby ensuring the service life of the sealing lip 140. In addition, when the shaft neck rotates, the scraper 190 on the dustproof lip 130 can scrape off the dust and impurities attached to the vicinity of the dustproof lip 130 on the shaft neck, thereby ensuring that the dustproof lip 130 and the vicinity of the shaft neck are clean. In addition, when the sealing lip 140 or the dustproof lip 130 fails, the partition lip 150 can still ensure the sealing performance.

[0029] 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 purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A crankshaft oil seal assembly, comprising: The main body module (100) is characterized in that the main body module (100) comprises a frame (110), an oil seal body (120) fixedly sleeved on the outside of the frame (110), a dust lip (130) arranged on the inside of the oil seal body (120), a sealing lip (140) arranged on the inside of the oil seal body (120), a partition lip (150) arranged on the inside of the oil seal body (120) and located between the dust lip (130) and the sealing lip (140), a first hoop spring (160) and a second hoop spring (170) arranged in the oil seal body (120) and surrounding the oil seal body (120), a lubricating coating (180) arranged on the outside of the sealing lip (140), the partition lip (150) and the dust lip (130), and a scraper (190) fixed in an annular array on one side of the dust lip (130).

2. A crankshaft oil seal assembly according to claim 1, characterized in that: The center of the first hoop spring (160) and the center of the sealing lip (140) are located on the same vertical plane.

3. The crankshaft oil seal assembly according to claim 1, characterized in that: The center of the second hoop spring (170) and the center of the partition lip (150) are located on the same vertical plane.

4. The crankshaft oil seal assembly according to claim 1, characterized in that: The frame (110) is made of stainless steel.

5. The crankshaft oil seal assembly according to claim 1, characterized in that: The oil seal body (120), the sealing lip (140), the partition lip (150), and the scraper (190) are all made of fluororubber.

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