CN219282424U

CN219282424U - Gearbox piston assembled oil seal

Info

Publication number: CN219282424U
Application number: CN202223204119.XU
Authority: CN
Inventors: 朱代贵; 刘小锐; 崔富贵
Original assignee: Kaco Anhui Sealing Technology Co ltd
Current assignee: Kaco Anhui Sealing Technology Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-06-30
Anticipated expiration: 2032-12-01

Abstract

The utility model provides a transmission piston assembly type oil seal which comprises a rubber sealing body, wherein the rubber sealing body is of an annular structure, a framework is embedded in the rubber sealing body, the inner peripheral surface of the rubber sealing body forms a static sealing surface, and the outer peripheral surface of the rubber sealing body is positioned at one axial end of the rubber sealing body and extends outwards to form a dynamic sealing lip. The skeleton ring provides effective support for the rubber sealing body, so that the static sealing surface and the dynamic sealing lip can still keep good working posture under high pressure; the dynamic sealing lip on the outer side moves along with the main body (reciprocates on the running surface), the static sealing surface on the inner side is designed to be wavy, and the static sealing is ensured by the interference of rubber and the main body.

Description

Gearbox piston assembled oil seal

Technical Field

The utility model relates to the technical field of oil seals, in particular to a transmission case piston assembly type oil seal.

Background

The piston oil seal of the automobile gearbox is formed by mutually bonding and covering a rubber coating body and a metal framework, the piston oil seal is matched with a clutch shell, the piston moves along the shell or a main shaft in the axial direction through hydraulic fluid pressure, and the piston oil seal is used for preventing the hydraulic fluid from leaking through bidirectional movement, so that the piston seal is realized.

Along with the continuous improvement of the requirements of light weight, energy conservation and emission reduction, the weight and the volume of the automobile gearbox are smaller and smaller. As the space of the transmission becomes more compact, the existing transmission piston oil seal as shown in fig. 1 requires a complex skeleton structure (shown at a in fig. 1) and has strict requirements on the assembly space (shown at B in fig. 1), which has not been applicable to the transmission with more and more compact space.

Disclosure of Invention

Based on the technical problems in the background art, the utility model provides a transmission case piston assembly type oil seal.

The utility model provides a transmission piston assembly type oil seal, which comprises a rubber sealing body, wherein the rubber sealing body is of an annular structure, a framework is embedded in the rubber sealing body, the inner peripheral surface of the rubber sealing body forms a static sealing surface, and the outer peripheral surface of the rubber sealing body is positioned at one axial end of the rubber sealing body and extends outwards to form a dynamic sealing lip.

In a preferred embodiment of the present utility model, the skeleton has a circular ring-shaped structure.

In a preferred embodiment of the utility model, the static seal is wavy.

In a preferred embodiment of the present utility model, the rubber seal is integrally vulcanization molded with the carcass.

In a preferred embodiment of the utility model, the dynamic sealing lip comprises a large lip and a small lip.

The utility model provides a transmission piston assembly type oil seal, which comprises a framework ring and a rubber sealing body wrapped outside the framework, wherein the framework ring provides effective support for the rubber sealing body, so that a static sealing surface and a dynamic sealing lip can still keep a good working posture under high pressure; the dynamic sealing lip on the outer side moves along with the main body (reciprocates on the running surface), the static sealing surface on the inner side is designed to be wavy, and the static sealing is ensured by the interference of rubber and the main body;

the utility model integrates the static sealing surface and the assembly characteristic of the traditional oil seal, not only ensures the function of static sealing, but also meets the assembly requirement, has simpler structure, lower space requirement and effectively reduces the cost

Compared with the traditional piston oil seal which does not need a complex framework structure and space requirements, the piston oil seal has the advantages that the space requirements are very low, the space with 2mm on one side between the main body and the running surface can be assembled and arranged, the space can be effectively saved, and meanwhile, the waste of materials is reduced.

The utility model can be arranged and used in a narrow space, and can ensure the functions of static sealing and dynamic sealing.

Drawings

FIG. 1 is a diagram of a state of use of a prior art medium speed gearbox piston oil seal;

fig. 2 is a usage state diagram of a piston assembly type oil seal of a gearbox provided by the utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

Referring to fig. 2, the present utility model proposes a transmission piston assembly type oil seal comprising a rubber seal body 1, wherein:

the rubber sealing body 1 is of an annular structure, the rubber sealing body 1 is internally embedded with the framework 2, the rubber sealing body 1 and the framework 2 are integrally vulcanized and formed, and the framework 2 is of an annular structure;

in the embodiment, the inner peripheral surface of the rubber sealing body 1 forms a static sealing surface 11, and the static sealing surface 11 is wavy;

in this embodiment, the outer peripheral surface of the rubber seal body 1 is formed with a dynamic seal lip 12 extending outwardly at one axial end position thereof, and the dynamic seal lip 12 includes a large lip 121 and a small lip 122.

The utility model comprises a framework circular ring and a rubber sealing body 1 wrapped outside a framework 2, wherein the framework 2 circular ring provides effective support for the rubber sealing body 1, so that a static sealing surface 11 and a dynamic sealing lip 12 can still keep a good working posture under high pressure; the dynamic sealing lip 12 on the outer side moves along with the main body (reciprocates on the running surface), the static sealing surface 11 on the inner side is designed to be wavy, and the static sealing is ensured by the interference of rubber and the main body;

the utility model integrates the static sealing surface and the assembly characteristic of the traditional oil seal, not only ensures the function of static sealing, but also meets the assembly requirement, has simpler structure, lower space requirement and effectively reduces the cost.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The transmission piston assembly type oil seal is characterized by comprising a rubber sealing body (1), wherein the rubber sealing body (1) is of an annular structure, a framework (2) is embedded in the rubber sealing body (1), a static sealing surface (11) is formed on the inner peripheral surface of the rubber sealing body (1), and a dynamic sealing lip (12) is formed by extending outwards from the outer peripheral surface of the rubber sealing body at one axial end of the rubber sealing body;

the framework (2) is in a circular ring structure.

2. Gearbox piston-fitted oil seal according to claim 1, characterised in that the static sealing surface (11) is wavy.

3. Gearbox piston-fitted oil seal according to any of claims 1-2, characterised in that the rubber seal (1) is integrally vulcanization moulded with the skeleton (2).

4. Gearbox piston-fitted oil seal according to any of claims 1-2, characterized in that the dynamic sealing lip (12) comprises a large lip (121) and a small lip (122).