Pressure-resistant sealing ring for gear shifting shaft

Abstract

The utility model relates to a pressure-resistant sealing ring for a gear shifting shaft, which comprises a rubber body, a supporting framework is embedded and fixed on the rubber body, the section of the supporting framework is Z-shaped, an outer sealing lip is arranged on the upper portion of the rubber body, an inner sealing lip is arranged on the lower portion of the rubber body, and the bottom of the outer sealing lip is supported by the upper end of the supporting framework. The outer sealing lip extends upwards in an inclined mode, and the connecting position of the outer sealing lip and the rubber body is arranged to be an arc face so that an outer reserved space can be formed between the outer sealing lip and the rubber body. The inner sealing lip extends upwards in an inclined mode, and the connecting position of the inner sealing lip and the rubber body is arranged to be an arc face so that an inner reserved space can be formed between the inner sealing lip and the rubber body. By the adoption of the technical scheme, the requirement that the internal pressure of a cavity where the gear shifting shaft is located reaches 1.25 MPa can be met, meanwhile, the axial and reciprocating sealing effect can be achieved, the sealing effect is good, assembling is convenient, friction resistance between the sealing ring and other accessories can be effectively reduced in the working process, and the service life of the gear shifting shaft is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the field of sealing rings, in particular to a pressure-resistant sealing ring for a shift shaft. Background Art

[0002] The sealing ring for a shift shaft is one of the components in a gearbox. It needs to meet a large pressure (usually the pressure will reach 1.25 MPa) and at the same time seal compressed air to achieve axial and reciprocating sealing effects. The existing shift shafts have problems of insufficient sealing performance and durability under high-pressure working conditions, and there are also problems of inconvenient assembly. Summary of the Invention

[0003] The purpose of the utility model is to provide a pressure-resistant sealing ring for a shift shaft, aiming to solve the existing problems.

[0004] The technical solution adopted by the utility model is: a pressure-resistant sealing ring for a shift shaft, including a rubber body, with a support skeleton embedded in the rubber body. The cross-section of the support skeleton is in a "Z" shape. An outer sealing lip is arranged on the upper part of the rubber body, and an inner sealing lip is arranged on the lower part of the rubber body. The bottom of the outer sealing lip is supported by the upper end of the support skeleton. The outer sealing lip extends obliquely upward, and the connection between the outer sealing lip and the rubber body is set as an arc surface, so that an outer reserved space is formed between the outer sealing lip and the rubber body. The inner sealing lip extends obliquely upward, and the connection between the inner sealing lip and the rubber body is set as an arc surface, so that an inner reserved space is formed between the inner sealing lip and the rubber body.

[0005] A further technical solution of the utility model is: the support skeleton is made of stainless steel, which can play a role in demagnetization and avoid affecting the magnetic signal of the shift shaft.

[0006] A further technical solution of the utility model is: a plurality of arc-shaped protrusions are arranged on the outer side wall of the outer sealing lip to reduce the frictional resistance with the outer sealing body.

[0007] A further technical solution of the utility model is: a plurality of arc-shaped protrusions are arranged on the outer side wall of the inner sealing lip to reduce the frictional resistance with the inner shaft.

[0008] The beneficial effect of the utility model is: due to adopting the above technical solution, the pressure-resistant sealing ring for a shift shaft of the utility model can meet the requirement that the internal pressure of the cavity where the shift shaft is located reaches 1.25 MPa, and at the same time can achieve axial and reciprocating sealing effects, with good sealing performance and convenient assembly. It can effectively reduce the frictional resistance between the sealing ring and other accessories during work and effectively improve its service life. Brief Description of the Drawings

[0009] Figure 1 It is a schematic cross-sectional structure diagram of the pressure-resistant sealing ring for a shift shaft described in the utility model. Detailed implementation manners

[0010] The following further describes the present utility model in conjunction with the accompanying drawings and specific implementation manners.

[0011] Embodiment:

[0012] As Figure 1 shown, a pressure-resistant sealing ring for a shift shaft includes a rubber body 2, and a support skeleton 1 is embedded in the rubber body. The cross-section of the support skeleton is in a "Z" shape. An outer sealing lip 3 is provided on the upper part of the rubber body, and an inner sealing lip 4 is provided on the lower part of the rubber body. The bottom of the outer sealing lip is supported by the upper end of the support skeleton. The outer sealing lip extends obliquely upward, and the connection between the outer sealing lip and the rubber body is set as an arc surface, so that an outer reserved space 31 is formed between the outer sealing lip and the rubber body. The inner sealing lip extends obliquely upward, and the connection between the inner sealing lip and the rubber body is set as an arc surface, so that an inner reserved space 32 is formed between the inner sealing lip and the rubber body. The outer reserved space and the inner reserved space can provide sufficient reserved space for the rubber body after deformation during assembly.

[0013] Further, the support skeleton is made of stainless steel. During the manufacturing process, stainless steel material is used for deep stamping forming, and demagnetization is carried out during secondary treatment, which can play a role in demagnetization and avoid affecting the magnetic signal of the shift shaft.

[0014] Further, a plurality of arc-shaped protrusions are provided on the outer side wall of the outer sealing lip to reduce the frictional resistance with the outer sealing body.

[0015] Further, a plurality of arc-shaped protrusions are provided on the outer side wall of the inner sealing lip to reduce the frictional resistance with the inner shaft.

[0016] In this solution, both the inner sealing lip and the outer sealing lip are designed in the shape of a sealing conical surface and are in interference fit with the sealing shaft and the outer sealing body respectively to achieve a good sealing effect.

[0017] In this solution, the pressure-resistant sealing ring for the shift shaft realizes axial and reciprocating sealing effects while meeting the pressure, and is convenient for installation and disassembly.

[0018] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pressure-resistant sealing ring for a shift shaft, characterized in that: A pressure-resistant seal ring for a shift shaft comprises a rubber body, a support frame is embedded in the rubber body, the cross section of the support frame is in a "Z" shape, an outer sealing lip is arranged on the upper part of the rubber body, an inner sealing lip is arranged on the lower part of the rubber body, the bottom of the outer sealing lip is supported by the upper end of the support frame, the outer sealing lip extends obliquely upward, and the connection between the outer sealing lip and the rubber body is set as an arc surface so that an outer reserved space is formed between the outer sealing lip and the rubber body, and the inner sealing lip extends obliquely upward, and the connection between the inner sealing lip and the rubber body is set as an arc surface so that an inner reserved space is formed between the inner sealing lip and the rubber body.

2. The pressure-resistant sealing ring for a shift shaft according to claim 1, characterized in that: The supporting frame is made of stainless steel.

3. A pressure-resistant sealing ring for a shift shaft according to claim 1 or 2, characterized in that: A plurality of arc-shaped protrusions are arranged on the outer side wall of the outer sealing lip.

4. A pressure-resistant sealing ring for a shift shaft according to claim 1 or 2, characterized in that: A plurality of arc-shaped protrusions are arranged on the outer side wall of the inner sealing lip.

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