Oil seal rotating structure

Abstract

The utility model provides an oil seal rotating structure, and belongs to the field of oil seals. The oil seal solves the problem that an existing oil seal is fast in abrasion and prone to generating abrasion gaps. The oil seal rotating structure comprises an inner sealing assembly, an outer sealing assembly and a dustproof assembly, the inner sealing assembly comprises a sealing base body, a sealing framework extending in the radial direction is arranged on the outer edge of the sealing base body, at least two sets of symmetrically-arranged elastic sealing lips are arranged outside the sealing framework, and the outer sealing assembly comprises an installation base fixedly connected with a hub. An installation groove with an opening facing the inner sealing assembly is formed in the inner side of the installation base, a detachable sealing gasket is arranged in the installation groove, the sealing gasket and the side wall of the installation groove form an axially symmetrical friction fit clearance, the dustproof assembly comprises a conical dustproof cover integrally formed with the outer sealing assembly, and the matched surface of the sealing framework is subjected to mirror polishing treatment. The free end of the elastic sealing lip and the matching surface of the sealing framework form dynamic contact sealing. The utility model has the advantage that the abrasion can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of oil seals and relates to an oil seal rotating structure. Background Technology

[0002] A hub motor integrates the power unit, transmission unit, and braking unit into the hub. Hub motors are usually installed on electric motorcycles. Their rotor housing is directly fixed to the hub, eliminating the need for transmission components. This results in a more compact structure and is commonly found in light vehicles.

[0003] To protect the components inside the hub motor, the hub motor needs to be sealed. Most traditional hub motor oil seals use a single-layer sealing lip structure, which wears quickly under high-speed rotation, easily creating wear gaps that lead to leakage. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an oil seal rotation structure to solve these problems.

[0005] The purpose of this utility model can be achieved through the following technical solution: an oil seal rotating structure, characterized in that it includes an inner sealing component, an outer sealing component and a dustproof component, the inner sealing component includes a sealing base coaxially sleeved on the hub motor drive shaft, the outer edge of the sealing base is provided with a radially extending sealing skeleton, and the outer side of the sealing skeleton is provided with at least two sets of symmetrically arranged elastic sealing lips.

[0006] The outer sealing assembly includes a mounting base fixedly connected to the hub. The inner side of the mounting base has a mounting groove with an opening facing the inner sealing assembly. A removable sealing gasket is provided in the mounting groove, and the sealing gasket forms an axially symmetrical friction fit clearance with the side wall of the mounting groove.

[0007] The dustproof assembly includes a conical dustproof cover integrally formed with the outer sealing assembly;

[0008] The mating surface of the sealing skeleton is mirror polished, and the free end of the elastic sealing lip forms a dynamic contact seal with the mating surface of the sealing skeleton.

[0009] In the above-mentioned oil seal rotation structure, the elastic sealing lip adopts a double-lip sealing structure, the elastic sealing lip includes a first sealing lip and a second sealing lip, wherein the first sealing lip is integrally connected with the side wall of the mounting groove, and the second sealing lip is integrally connected with the end of the sealing gasket.

[0010] In the above-mentioned oil seal rotation structure, the working end faces of the first sealing lip and the second sealing lip respectively form a dynamic sealing fit with the corresponding end faces of the sealing skeleton, and achieve a bidirectional sealing effect by generating contact pressure through elastic deformation.

[0011] In one of the above-mentioned oil seal rotating structures, the sealing gasket is made of fluororubber material.

[0012] In the aforementioned oil seal rotation structure, the axial cross-section of the dust cover has a figure-eight symmetrical structure, and its outer edge is integrally connected with the mounting base.

[0013] Compared with existing technologies, this oil seal rotation structure significantly reduces friction and wear through the dynamic contact between the mirror-polished sealing skeleton and the elastic sealing lip, ensuring a long-term stable sealing effect during rotation. The double-lip structure generates bidirectional contact pressure through elastic deformation, achieving bidirectional sealing, preventing both internal oil leakage and the infiltration of external contaminants. Attached Figure Description

[0014] Figure 1 This is a simplified half-section diagram of the rotating structure of this oil seal.

[0015] In the figure, 1 is the sealing substrate; 2 is the sealing skeleton; 3 is the mounting base; 4 is the mounting groove; 5 is the sealing gasket; 6 is the friction fit clearance; 7 is the first sealing lip; 8 is the second sealing lip; and 9 is the dust cover. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figure 1 As shown, this oil seal rotating structure includes an inner sealing assembly, an outer sealing assembly, and a dustproof assembly. The inner sealing assembly includes a sealing base 1 coaxially sleeved on the hub motor drive shaft. The outer edge of the sealing base 1 is provided with a radially extending sealing skeleton 2. The outer side of the sealing skeleton 2 is provided with at least two sets of symmetrically arranged elastic sealing lips. The outer sealing assembly includes a mounting seat 3 fixedly connected to the hub. The inner side of the mounting seat 3 forms a mounting groove 4 with an opening facing the inner sealing assembly. The mounting groove 4 is provided with a removable sealing gasket 5. The sealing gasket 5 and the side wall of the mounting groove 4 form an axially symmetrical friction fit gap 6. The dustproof assembly includes a conical dustproof cover 9 integrally formed with the outer sealing assembly. The mating surface of the sealing skeleton 2 is mirror polished, and the free end of the elastic sealing lip forms a dynamic contact seal with the mating surface of the sealing skeleton 2.

[0018] The dynamic contact between the mirror-polished sealing skeleton 2 and the elastic sealing lip significantly reduces friction and wear, ensuring a long-term stable sealing effect during rotation. The double-lip structure generates bidirectional contact pressure through elastic deformation, achieving bidirectional sealing, preventing both internal oil leakage and the infiltration of external contaminants.

[0019] The elastic sealing lip adopts a double-lip sealing structure, which includes a first sealing lip 7 and a second sealing lip 8. The first sealing lip 7 is integrally connected with the side wall of the mounting groove 4, and the second sealing lip 8 is integrally connected with the end of the sealing gasket 5. The working end faces of the first sealing lip 7 and the second sealing lip 8 respectively form a dynamic sealing fit with the corresponding end faces of the sealing skeleton 2. The contact pressure generated by elastic deformation achieves a bidirectional sealing effect. The sealing gasket 5 is made of fluororubber material. The axial section of the dust cover 9 has an symmetrical V-shaped structure, and its outer edge is integrally connected with the mounting base 3.

[0020] The sealing substrate 1 is fitted onto the hub motor drive shaft, and its outer edge sealing skeleton 2 is mirror-polished to form a smooth contact surface. Multiple sets of symmetrical elastic sealing lips (double lip structure) are in dynamic contact with the sealing skeleton 2, generating contact pressure through elastic deformation, forming a dynamic seal during rotation to prevent lubricating oil leakage.

[0021] Mounting base 3 is fixed to the wheel hub. The removable fluororubber sealing gasket 5 in its mounting groove 4 forms a friction fit gap 6 with the side wall of the groove, which allows for axial fine adjustment and also achieves static sealing through friction. In the double-lip structure, the first sealing lip 7 is integrally connected to the side wall of the mounting groove 4, and the second sealing lip 8 is integrally connected to the end of the sealing gasket 5, forming a bidirectional seal to further prevent the penetration of internal and external media.

[0022] The conical dust cover 9 is integrally molded with the outer sealing component. Its figure-eight symmetrical cross-section structure can guide external dust and impurities away from the sealing area, preventing contaminants from entering.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0024] Although this document uses a lot of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any kind of additional limitation would contradict the spirit of this invention.

Claims

1. An oil seal rotating structure characterized by, The inner sealing assembly, the outer sealing assembly and the dustproof assembly are included, the inner sealing assembly includes a sealing base (1) coaxially sleeved on the wheel hub motor transmission shaft, the outer edge of the sealing base (1) is provided with a radially extending sealing framework (2), and the outer part of the sealing framework (2) is provided with at least two groups of symmetrically arranged elastic sealing lips; The outer sealing assembly includes a mounting seat (3) fixedly connected with the wheel hub, an installation groove (4) with an opening towards the inner sealing assembly is formed in the inner side of the mounting seat (3), a detachable sealing gasket (5) is arranged in the installation groove (4), and the sealing gasket (5) and the side wall of the installation groove (4) form an axially symmetric friction fit gap (6). The dustproof assembly includes a conical dustproof cover (9) integrally formed with the outer sealing assembly. The matching surface of the sealing framework (2) is mirror-polished, and the free end of the elastic sealing lip forms a dynamic contact seal with the matching surface of the sealing framework (2).

2. A rotary seal structure according to claim 1, wherein The elastic sealing lip adopts a double-lip sealing structure, and the elastic sealing lip includes a first sealing lip (7) and a second sealing lip (8), wherein the first sealing lip (7) is integrally connected with the side wall of the installation groove (4), and the second sealing lip (8) is integrally connected with the end part of the sealing gasket (5).

3. A rotary oil seal structure according to claim 2, wherein The working end faces of the first sealing lip (7) and the second sealing lip (8) respectively form dynamic sealing cooperation with the corresponding end faces of the sealing framework (2), and the contact pressure is generated by elastic deformation to realize the bidirectional sealing effect.

4. A rotary seal structure according to claim 1, wherein The sealing gasket (5) is made of fluorine rubber material.

5. A rotary seal structure according to claim 1, wherein The axial section of the dustproof cover (9) is in an eight-shaped symmetrical structure, and the outer edge of the dustproof cover (9) is integrally connected with the mounting seat (3).

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