Oil seal structure of electric vehicle

Abstract

The utility model relates to the technical field of electric vehicles, in particular to an oil seal structure of an electric vehicle, which comprises a motor side cover, a sealing convex part is arranged in the middle of the motor side cover, the sealing convex part is provided with a circular slot, an oil seal component is arranged in the circular slot, and the oil seal component comprises an inner oil seal structure and an outer oil seal structure. The inner oil seal structure and the outer oil seal structure are in butt joint with the two sides of the sealing convex part in a matched mode, the sealing convex part comprises a ring body fixedly connected with the middle of the motor side cover, and the two sides of the ring body are provided with an outer sealing butt joint structure and an inner sealing butt joint structure respectively. The outer oil seal structure and the inner oil seal structure are in matched butt joint with the sealing butt joint structure and the inner sealing butt joint structure on the sealing convex part respectively, the structure is simple, the overall sealing performance is good, and silt and dust can be effectively prevented from entering.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to an oil seal structure of an electric vehicle. Background Art

[0002] The hub motor is a motor designed by integrating the "power system, transmission system, and brake system" of the car. Its working principle is based on the law of electromagnetic induction, that is, electrical energy is directly converted into mechanical energy of wheel rotation to drive the vehicle. The hub motor skeleton oil seal is a sealing component, which is commonly used in the hub motor of electric bicycles. Its main function is to prevent water, dust, and debris from entering the hub motor, while ensuring that the lubricating oil does not leak inside the hub motor.

[0003] The existing hub motor skeleton oil seal usually has a complex structure. For example, the Chinese utility model patent with application number 201822240187. discloses an oil seal dustproof structure for an electric vehicle hub motor, including a motor shaft, a wheel hub and a cover body fixed to the side of the wheel hub, a first dust cover and a second dust cover located on the outside of the oil seal, the first dust cover is connected to the cover body by a tight fit, and the first dust cover has a sealing portion 1 folded inward; the second dust cover is sleeved on the motor shaft, and the second dust cover has a sealing portion 2 folded outward; the sealing portion 1 and the sealing portion 2 are arranged in relative positions, and a labyrinth sealing structure is provided between the sealing portion 1 and the sealing portion 2, which is easy to fall off after installation and has poor versatility. At the same time, some oil seal structures have poor sealing performance and cannot prevent mud, sand and dust from entering, and the protection effect is extremely limited.

[0004] Therefore, an oil seal structure for an electric vehicle is needed to improve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an oil seal structure for an electric vehicle to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An oil seal structure for an electric vehicle comprises a motor side cover, wherein a sealing convex portion is arranged in the middle of the motor side cover, the sealing convex portion has a circular groove, an oil seal assembly is arranged in the circular groove, the oil seal assembly comprises an inner oil seal structure and an outer oil seal structure, the inner oil seal structure and the outer oil seal structure are mated with two sides of the sealing convex portion.

[0008] As a preferred solution of the utility model, the sealing protrusion includes a ring body fixedly connected to the middle part of the motor side cover, and an outer sealing docking structure and an inner sealing docking structure are respectively provided on two sides of the ring body.

[0009] As a preferred solution of the utility model, a sealing groove is provided inside the circular groove in the middle of the ring body, and a sealing ring is provided inside the sealing groove.

[0010] As a preferred solution of the utility model, the inner oil seal structure includes an inner oil seal, a lining member is fixedly connected to the middle part of the inner oil seal, the outer oil seal structure includes an outer oil seal threadedly connected to the end of the inner lining member, a plurality of inner sealing rings are arranged on the side of the inner oil seal, and a plurality of outer sealing rings are arranged on the side of the outer oil seal.

[0011] As a preferred solution of the utility model, the inner sealing docking structure includes a plurality of inner sealing sliding grooves corresponding to the positions of the inner sealing rings, and the outer sealing docking structure includes a plurality of outer sealing ring grooves corresponding to the positions of the outer sealing rings.

[0012] As a preferred solution of the utility model, a sealing cover is fixedly connected to the middle portion of the outer side of the lining member.

[0013] As a preferred solution of the utility model, the motor side cover has a plurality of zigzag structures.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model cooperates and docks with the sealing docking structure on the sealing convex part and the inner sealing docking structure through the outer oil seal structure and the inner oil seal structure respectively. The utility model has a simple structure and good overall sealing performance, and can effectively prevent mud, sand and dust from entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0019] In the figure: motor side cover 1, inner oil seal 2, sealing cover 3, bearing 4, inner lining 5, sealing groove 6, sealing ring 7, outer sealing ring 8, outer oil seal 9, outer sealing ring groove 10, inner sealing ring 11. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant. Several embodiments of the utility model are given. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] See also Figure 1-3 , the utility model provides a technical solution:

[0025] For example, please refer to Figure 1 , 2 3. An oil seal structure of an electric vehicle comprises a motor side cover 1, the motor side cover 1 has a plurality of zigzag structures, a sealing convex portion is arranged in the middle of the motor side cover 1, the sealing convex portion has a circular groove, an oil seal assembly is arranged in the circular groove, the oil seal assembly comprises an inner oil seal structure and an outer oil seal structure, the inner oil seal structure and the outer oil seal structure are matched and docked with two sides of the sealing convex portion.

[0026] The oil seal assembly includes an inner oil seal structure and an outer oil seal structure. The oil seal assembly is detachable. The outer oil seal structure is detachable and can be easily disassembled. The oil seal assembly cooperates with both sides of the sealing convex part to ensure the overall sealing effect and effectively prevent the entry of mud, sand and dust.

[0027] Please refer to Figure 1 , 2 3. The sealing protrusion includes a ring body fixedly connected to the middle part of the motor side cover 1, and an outer sealing docking structure and an inner sealing docking structure are respectively opened on both sides of the ring body.

[0028] The outer sealing butt joint structure and the inner sealing butt joint structure are respectively matched and butted with the outer oil sealing structure and the inner oil sealing structure to form an inner and outer sealing structure, thereby ensuring an overall sealing effect.

[0029] Please refer to Figure 1 , 2 3. A sealing groove 6 is provided inside the circular groove in the middle of the ring body, and a sealing ring 7 is provided inside the sealing groove 6.

[0030] The sealing ring 7 is arranged in close contact with the inner sealing docking structure to form a multi-channel sealing structure, thereby ensuring the sealing effect.

[0031] The inner oil seal structure includes an inner oil seal 2, a lining member 5 is fixedly connected to the middle of the inner oil seal 2, a sealing cover 3 is fixedly connected to the middle of the outer side of the inner lining member 5, the outer oil seal structure includes an outer oil seal 9 threadedly connected to the end of the inner lining member 5, a plurality of inner sealing rings 11 are arranged on the side of the inner oil seal 2, a plurality of outer sealing rings 8 are arranged on the side of the outer oil seal 9, the inner sealing docking structure includes a plurality of inner sealing grooves corresponding to the positions of the inner sealing rings 11, and the outer sealing docking structure includes a plurality of outer sealing ring grooves 10 corresponding to the positions of the outer sealing rings 8.

[0032] The outer sealing ring 8 is butted against the outer sealing ring groove 10 to form a plurality of outer sealing structures, and the inner sealing ring 11 is butted against the inner sealing groove to form a plurality of inner sealing structures.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil seal structure for an electric vehicle, comprising a motor side cover (1), characterized in that: A sealing convex portion is arranged in the middle of the motor side cover (1), the sealing convex portion has a circular groove, an oil seal assembly is arranged in the circular groove, the oil seal assembly comprises an inner oil seal structure and an outer oil seal structure, the inner oil seal structure and the outer oil seal structure are mated with two sides of the sealing convex portion.

2. The oil seal structure of the electric vehicle according to claim 1, characterized in that: The sealing protrusion comprises a ring body fixedly connected to the middle part of the motor side cover (1), and two sides of the ring body are respectively provided with an outer sealing docking structure and an inner sealing docking structure.

3. The oil seal structure of the electric vehicle according to claim 2, characterized in that: A sealing groove (6) is provided inside the circular groove in the middle of the ring body, and a sealing ring (7) is provided inside the sealing groove (6).

4. The oil seal structure of an electric vehicle according to any one of claims 2 to 3, characterized in that: The inner oil seal structure comprises an inner oil seal (2), the middle part of which is fixedly connected to an inner lining member (5), the outer oil seal structure comprises an outer oil seal (9) threadedly connected to the end of the inner lining member (5), a plurality of inner sealing rings (11) are arranged on the side of the inner oil seal (2), and a plurality of outer sealing rings (8) are arranged on the side of the outer oil seal (9).

5. The oil seal structure of the electric vehicle according to claim 2, characterized in that: The inner sealing docking structure comprises a plurality of inner sealing sliding grooves corresponding to the positions of the inner sealing rings (11), and the outer sealing docking structure comprises a plurality of outer sealing ring grooves (10) corresponding to the positions of the outer sealing rings (8).

6. The oil seal structure of the electric vehicle according to claim 4, characterized in that: A sealing cover (3) is fixedly connected to the middle portion of the outer side of the lining member (5).

7. The oil seal structure of the electric vehicle according to claim 4, characterized in that: The motor side cover (1) has a plurality of zigzag structures.

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