Sealing structure of hub motor

Abstract

The utility model discloses a sealing structure of a wheel hub motor, which comprises a wheel hub motor main body, a first sealing assembly and a second sealing assembly, the wheel hub motor main body comprises a wheel hub, a motor shaft, an end cover and a hub cover, the motor shaft is arranged on the wheel hub, the end cover is arranged at the left end of the wheel hub, and the hub cover is arranged at the right end of the wheel hub. A first sealing groove is formed in the end cover, the first sealing assembly is arranged in the first sealing groove, a second sealing groove is formed in the inner side face of the hub cover, the second sealing assembly is arranged in the second sealing groove, and the motor shaft is sleeved with the end cover, the hub cover, the first sealing assembly and the second sealing assembly. The first sealing assembly performs sealing protection on the end cover end, and the second sealing assembly performs sealing protection on the hub cover end, so that through the arrangement of the structure, the waterproof and dustproof effects of the hub motor main body can be improved, and the sealing performance of the hub motor main body can also be improved; and the risk of abnormal faults of the hub motor main body is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a hub motor, in particular to a sealing structure of the hub motor. Background Art

[0002] Currently, most hub motors on the market use rotary oil. However, this sealing method has poor waterproof and dustproof effects on the one hand, and insufficient sealing can easily cause the lubricating oil inside the oil seal to dry up, causing various abnormal failures in the motor. Therefore, improvements are needed. Summary of the invention

[0003] The utility model aims at the defects of the oil seal in the prior art such as poor waterproof and dustproof properties and insufficient sealing performance, and provides a new sealing structure for a hub motor.

[0004] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0005] A sealing structure for a hub motor comprises a hub motor body, wherein the hub motor body comprises a wheel hub, a motor shaft, an end cover and a hub cover, wherein the motor shaft is arranged on the wheel hub, the end cover is arranged at the left end of the wheel hub, and the hub cover is arranged at the right end of the wheel hub, and further comprises a first sealing assembly and a second sealing assembly, wherein a first sealing groove is formed on the end cover, the first sealing assembly is arranged in the first sealing groove, a second sealing groove is formed on the inner side surface of the hub cover, the second sealing assembly is arranged in the second sealing groove, and the end cover, the hub cover, the first sealing assembly and the second sealing assembly are all sleeved on the motor shaft.

[0006] The first sealing component of the utility model seals and protects the end cover end, and the second sealing component seals and protects the hub cover end. Therefore, through the arrangement of the above-mentioned structure, on the one hand, the waterproof and dustproof effect of the hub motor body can be improved, and on the other hand, the sealing performance of the hub motor body can be improved, thereby effectively reducing the risk of abnormal failure of the hub motor body.

[0007] Preferably, in the sealing structure of the hub motor described above, the first sealing assembly includes an end cover outer oil seal and an end cover inner oil seal, the end cover outer oil seal is arranged on the left side of the first sealing groove, and the end cover inner oil seal is arranged on the right side of the first sealing groove.

[0008] Through the double protection of the end cover outer oil seal and the end cover inner oil seal, the waterproof and dustproof effect of the end cover end can be effectively improved, and the sealing performance of the end cover end can be improved.

[0009] Preferably, in the sealing structure of the hub motor described above, the hub motor body further comprises a retaining spring and a first bearing, and the retaining spring and the first bearing are arranged in sequence between the end cover outer oil seal and the end cover inner oil seal.

[0010] The setting of the retaining spring can prevent the motor shaft from moving up and down during movement, while the first bearing can improve the smoothness of the hub motor body during movement.

[0011] Preferably, in the sealing structure of the hub motor described above, the inner diameter of the end cover outer oil seal is larger than the outer diameter of the retaining spring.

[0012] The inner diameter of the end cover outer oil seal is larger than the outer diameter of the retaining ring, which can improve the sealing performance of the end cover end to prevent lubricating oil and other substances from flowing out of the end cover end.

[0013] Preferably, in the sealing structure of the hub motor described above, the hub motor body further comprises a dust cover, and the dust cover is arranged at the left end of the first sealing groove and covers the first sealing groove.

[0014] The provision of a dust cover can further enhance the waterproof and dustproof effect of the end cover.

[0015] Preferably, in the sealing structure of the hub motor described above, the second sealing assembly comprises a hub cover oil seal, and the hub cover oil seal is arranged in the second sealing groove.

[0016] The hub cover oil seal can further improve the sealing performance of the hub cover.

[0017] Preferably, in the sealing structure of the hub motor described above, the hub motor body further comprises a second bearing, and the second bearing is arranged between the hub cover oil seal and the wheel hub.

[0018] The provision of the second bearing can further improve the smoothness of the movement of the hub motor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the exploded structure of the hub motor body of the utility model;

[0020] Figure 2 It is a schematic diagram of the longitudinal section structure of the hub motor body of the utility model. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-2 The present invention is further described in detail with the following specific embodiments, but they are not intended to limit the present invention:

[0022] Example 1

[0023] like Figure 1 , Figure 2 As shown, a sealing structure of a hub motor includes a hub motor body 1, wherein the hub motor body 1 includes a wheel hub 11, a motor shaft 12, an end cover 13 and a hub cover 14, wherein the motor shaft 12 is arranged on the wheel hub 11, the end cover 13 is arranged at the left end of the wheel hub 11, and the hub cover 14 is arranged at the right end of the wheel hub 11, and further includes a first sealing component 2 and a second sealing component 3, wherein a first sealing groove 131 is formed on the end cover 13, the first sealing component 2 is arranged in the first sealing groove 131, a second sealing groove 141 is formed on the inner side surface of the hub cover 14, and the second sealing component 3 is arranged in the second sealing groove 141, and the end cover 13, the hub cover 14, the first sealing component 2 and the second sealing component 3 are all sleeved on the motor shaft 12.

[0024] Preferably, the first sealing assembly 2 includes an end cover outer oil seal 21 and an end cover inner oil seal 22 , wherein the end cover outer oil seal 21 is arranged on the left side of the first sealing groove 131 , and the end cover inner oil seal 22 is arranged on the right side of the first sealing groove 131 .

[0025] Specifically, a first oil storage tank 211 is provided on a side of the end cover outer oil seal 21 facing the wheel hub 11 , and a second oil storage tank 221 is provided on a side of the end cover inner oil seal 22 facing the wheel hub 11 .

[0026] Preferably, the hub motor body 1 further includes a retaining spring 15 and a first bearing 16 , and the retaining spring 15 and the first bearing 16 are sequentially arranged between the end cover outer oil seal 21 and the end cover inner oil seal 22 .

[0027] Preferably, the inner diameter of the end cover outer oil seal 21 is larger than the outer diameter of the retaining ring 15 .

[0028] Preferably, the hub motor body 1 further includes a dust cover 17 , which is disposed at the left end of the first sealing groove 131 and covers the first sealing groove 131 .

[0029] Preferably, the second sealing assembly 3 includes a hub cover oil seal 31 , and the hub cover oil seal 31 is disposed in the second sealing groove 141 .

[0030] Specifically, a third oil storage groove 311 is further provided on the side of the hub cover oil seal 31 facing the wheel hub 11 .

[0031] Preferably, the hub motor body 1 further includes a second bearing 18 , and the second bearing 18 is disposed between the hub cover oil seal 31 and the wheel hub 11 .

[0032] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application for the present invention should fall within the scope of the present invention.

Claims

1. A sealing structure for a hub motor, comprising a hub motor body (1), wherein the hub motor body (1) comprises a wheel hub (11), a motor shaft (12), an end cover (13) and a hub cover (14), wherein the motor shaft (12) is arranged on the wheel hub (11), the end cover (13) is arranged at the left end of the wheel hub (11), and the hub cover (14) is arranged at the right end of the wheel hub (11), characterized in that: The motor further comprises a first sealing component (2) and a second sealing component (3); the end cover (13) is provided with a first sealing groove (131); the first sealing component (2) is arranged in the first sealing groove (131); the inner side surface of the hub cover (14) is provided with a second sealing groove (141); the second sealing component (3) is arranged in the second sealing groove (141); the end cover (13), the hub cover (14), the first sealing component (2) and the second sealing component (3) are all sleeved onto the motor shaft (12).

2. The sealing structure of a hub motor according to claim 1, characterized in that: The first sealing assembly (2) comprises an end cover outer oil seal (21) and an end cover inner oil seal (22), wherein the end cover outer oil seal (21) is arranged on the left side of the first sealing groove (131), and the end cover inner oil seal (22) is arranged on the right side of the first sealing groove (131).

3. The sealing structure of a hub motor according to claim 2, characterized in that: The hub motor body (1) further comprises a retaining spring (15) and a first bearing (16), wherein the retaining spring (15) and the first bearing (16) are arranged in sequence between the end cover outer oil seal (21) and the end cover inner oil seal (22).

4. The sealing structure of a hub motor according to claim 3, characterized in that: The inner diameter of the end cover outer oil seal (21) is greater than the outer diameter of the retaining ring (15).

5. The sealing structure of a hub motor according to claim 1, characterized in that: The hub motor body (1) further comprises a dust cover (17), wherein the dust cover (17) is arranged at the left end of the first sealing groove (131) and covers the first sealing groove (131).

6. The sealing structure of a hub motor according to claim 1, characterized in that: The second sealing assembly (3) comprises a hub cover oil seal (31), and the hub cover oil seal (31) is arranged in the second sealing groove (141).

7. The sealing structure of a hub motor according to claim 6, characterized in that: The wheel hub motor body (1) further comprises a second bearing (18), wherein the second bearing (18) is arranged between the hub cover oil seal (31) and the wheel hub (11).

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