Rear output oil seal of transfer case

Abstract

The utility model discloses a transfer case rear output oil seal, and belongs to the technical field of rear output oil seals. Comprising a dust cover, a metal framework and a lip structure, the dustproof cover, the lip structure and the metal framework are vulcanized into a whole through the vulcanization mold, the outer diameter portion of the metal framework is in interference fit with the rear output shell, metal and metal are in direct interference assembly, and the rebound problem occurring when an oil seal with the outer diameter of a rubber body structure and the shell are installed on the market at present can be avoided. The inner diameter of the dustproof cover is in clearance fit with the rear output shaft, so that most dust can be effectively prevented from entering the sealing part of the oil seal. The auxiliary lip part of the lip structure is in interference fit with the rear output shaft, so that dust entering from the inner wall of the dust cover is prevented from being isolated outside the oil seal, and the sealing performance of the oil seal is ensured; and the main lip part of the lip structure is in interference fit with the rear output shaft, so that the sealing of variable speed oil in the rear output chamber can be ensured.

Description

Technical Field

[0001] This utility model belongs to the field of rear output oil seal technology, specifically relating to a transfer case rear output oil seal. Background Technology

[0002] Rear output oil seals are now widely used in transmissions, but many problems have arisen as a result, such as oil seal rebound after installation, improper installation, and poor dust protection. These problems affect the performance of both the oil seal and the transmission. Utility Model Content

[0003] This utility model is a new type of rear output oil seal structure that improves upon the series of problems that have appeared on the market, solving the problems of assembly rebound and poor dust prevention effect of the original oil seal structure.

[0004] The technical solution adopted by this utility model is:

[0005] A transfer case rear output oil seal includes a dust cover, a metal frame, and a lip structure; the dust cover and the lip structure are connected to the metal frame; the outer diameter of the metal frame is interference-fitted with the rear output housing, the inner diameter of the dust cover is clearance-fitted with the rear output shaft, the secondary lip of the lip structure is interference-fitted with the rear output shaft, and the primary lip of the lip structure is interference-fitted with the rear output shaft.

[0006] Compared with the prior art, the present invention has the following advantages:

[0007] 1. This utility model integrates the dust cover, lip structure and metal frame into one piece by vulcanizing mold. The outer diameter of the metal frame is interference-fitted with the rear output housing. The metal is directly interference-fitted with the metal, which can avoid the rebound problem that occurs when installing oil seals with rubber outer diameter structures and housings on the market.

[0008] 2. The inner diameter of the dust cover of this utility model is clearance-fitted with the rear output shaft, which can effectively prevent most dust from entering the oil seal sealing part.

[0009] 3. The secondary lip of the lip structure of this utility model forms an interference fit with the rear output shaft to prevent dust entering from the inner wall of the dust cover from entering outside the oil seal, thereby ensuring the sealing performance of the oil seal.

[0010] The main lip of the lip structure forms an interference fit with the rear output shaft, which can ensure the sealing of the transmission oil in the rear output chamber.

[0011] 4. This utility model achieves a dual dustproof effect through the dust cover and the secondary lip.

[0012] 5. The oil seal of this utility model does not require positioning during assembly; it can be self-positioned by the retaining edge of the outer diameter of the oil seal. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is an assembly diagram of the present invention;

[0015] The components include: 1. Dust cover; 2. Metal frame; 201. Edge guard; 202. Connecting part; 3. Lip structure; 301. Secondary lip; 302. Main lip; 4. Rear output housing; 5. Rear output shaft. Detailed Implementation

[0016] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model will be provided below with reference to the accompanying drawings.

[0017] like Figure 1 , Figure 2 As shown, this utility model provides a transfer case rear output oil seal, including a dust cover 1, a metal frame 2, and a lip structure 3; the dust cover 1 and the lip structure 3 are connected to the metal frame 2; the dust cover 1, the lip structure 3, and the metal frame 2 are vulcanized into one piece using a vulcanization mold.

[0018] The outer diameter of the metal frame 2 is press-fitted with the rear output housing 4. The direct press-fitting of metal to metal avoids the rebound problem that occurs when installing oil seals with rubber body structures on the market with housings.

[0019] The inner diameter of the dust cover 1 is clearance-fitted with the rear output shaft 5 (the clearance is 0-0.3), which can effectively prevent most dust from entering the oil seal sealing part.

[0020] The secondary lip 301 of the lip structure 3 forms an interference fit with the rear output shaft 5 to prevent dust entering from the inner wall of the dust cover from being isolated outside the oil seal, thereby ensuring the sealing performance of the oil seal.

[0021] The main lip 302 of the lip structure 3 forms an interference fit with the rear output shaft 5 to ensure the sealing of the transmission oil in the rear output chamber.

[0022] Both the dust cover 1 and the lip structure 3 are made of rubber.

[0023] The metal frame 2 has a ring structure and a U-shaped main body. The metal frame 2 is fitted between the rear output housing 4 and the rear output shaft 5. The dust cover 1 is plugged into the U-shaped port of the metal frame 2.

[0024] The outer end of the metal frame 2 is bent outward to form a retaining edge 201. The retaining edge 201 cooperates with the rear output housing 4 to ensure the oil seal is self-positioned during installation.

[0025] The inner end of the metal frame 2 is bent inward to form a connecting part 202, which is inserted into the lip structure 3.

[0026] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A transfer case rear output oil seal, characterized in that: It includes a dust cover (1), a metal frame (2), and a lip structure (3); the dust cover (1) and the lip structure (3) are connected to the metal frame (2); the outer diameter of the metal frame (2) is interference-fitted with the rear output housing (4), the inner diameter of the dust cover (1) is clearance-fitted with the rear output shaft (5), the secondary lip (301) of the lip structure (3) is interference-fitted with the rear output shaft (5), and the main lip (302) of the lip structure (3) is interference-fitted with the rear output shaft (5).

2. The transfer case output oil seal according to claim 1, characterized in that: Both the dust cover (1) and the lip structure (3) are made of rubber.

3. The transfer case output oil seal according to claim 2, characterized in that: The clearance between the dust cover (1) and the rear output shaft (5) is 0-0.3mm.

4. The transfer case output oil seal according to claim 2, characterized in that: The metal frame (2) is a ring structure and the main body is U-shaped. The metal frame (2) is fitted between the rear output housing (4) and the rear output shaft (5). The dust cover (1) is inserted into the U-port of the metal frame (2).

5. The transfer case output oil seal according to claim 4, characterized in that: The outer end of the metal frame (2) is bent outward to form a retaining edge (201), which cooperates with the rear output housing (4).

6. The transfer case rear output oil seal according to claim 4, characterized in that: The inner end of the metal frame (2) is bent inward to form a connecting part (202), and the connecting part (202) is inserted into the lip structure (3).

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