A heat dissipation structure of an in-wheel motor

Abstract

The utility model discloses a kind of heat dissipation structures of in-wheel motor, including in-wheel motor, the in-wheel motor includes rotor shell, stator and motor shaft, the stator is arranged in the rotor shell, the motor shaft sequentially passes through the rotor shell and stator from one side and is worn from the other side, characterized by: it further includes heat dissipation component, the heat dissipation component is arranged in the outside of the in-wheel motor, and part is along motor shaft and enters in-wheel motor and stator connection.This application is added by heat dissipation component on in-wheel motor, in-wheel motor can be quickly heat dissipated in working process on one hand, on the other hand, due to the effect of heat dissipation component can be further improved since heat dissipation component leaks in rotor shell.

Description

Technical Field

[0001] This utility model relates to hub motors, and more particularly to a heat dissipation structure for hub motors. Background Technology

[0002] Hub motors, as a key drive component for electric two-wheelers, offer advantages such as compact structure, high transmission efficiency, and rapid response. However, due to their highly integrated design, the heat generated during operation is difficult to dissipate effectively. Prolonged high-temperature operation not only reduces the motor's performance and efficiency but also necessitates improvements. Summary of the Invention

[0003] This invention addresses the shortcomings of existing hub motors, such as poor heat dissipation, by providing a new heat dissipation structure for hub motors.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] A heat dissipation structure for a hub motor includes a hub motor, the hub motor comprising a rotor housing, a stator and a motor shaft, the stator being disposed within the rotor housing, and the motor shaft passing sequentially through the rotor housing and the stator from one side and exiting from the other side, characterized in that: it further includes a heat dissipation assembly disposed on the outside of the hub motor, and a portion of the heat dissipation assembly extending along the motor shaft into the hub motor and connecting to the stator.

[0006] This application adds a heat dissipation component to the hub motor, which enables the hub motor to dissipate heat quickly during operation. Furthermore, since the heat dissipation component is exposed to the rotor housing, its effectiveness is further enhanced.

[0007] Preferably, in the heat dissipation structure of the hub motor described above, the heat dissipation component includes a heat-conducting bracket and a heat sink, the heat-conducting bracket is disposed between the stator and the motor shaft, and the heat sink is connected to the heat-conducting bracket.

[0008] Preferably, in the heat dissipation structure of the hub motor described above, the heat-conducting bracket extends a fixed end into the rotor housing, and the heat sink is connected to the fixed end.

[0009] As a preferred embodiment, the heat dissipation structure of the hub motor described above further includes a motor wire, and a heat dissipation groove is provided on the heat-conducting bracket, with the motor wire disposed within the heat dissipation groove.

[0010] Preferably, in the heat dissipation structure of the hub motor described above, the hub motor further includes a drying tube, which is also disposed within the heat dissipation groove.

[0011] Preferably, in the heat dissipation structure of the hub motor described above, the heat-conducting bracket is further provided with an adhesive potting area.

[0012] The present invention has the following advantages through the above structural improvements:

[0013] Compared with the prior art, this application can achieve rapid heat dissipation. By adding a heat dissipation component to the hub motor, the heat generated by the stator and motor wires can be dissipated on the one hand, and the heat dissipation effect of the heat dissipation component can be further improved since part of the heat dissipation component is exposed to the hub motor. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram of the hub motor of this utility model;

[0015] Figure 2 This is a longitudinal section diagram of the hub motor of this utility model.

[0016] Reference numerals: 1. Hub motor; 11. Rotor housing; 12. Stator; 13. Motor shaft; 2. Heat dissipation assembly; 21. Heat conduction bracket; 22. Heat sink; 14. Motor wire; 211. Heat dissipation groove; 15. Drying tube; 212. Glue potting area. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-2 The present invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the present invention:

[0018] Example 1

[0019] like Figure 1 , Figure 2 As shown, a heat dissipation structure for a hub motor includes a hub motor 1. The hub motor 1 includes a rotor housing 11, a stator 12, and a motor shaft 13. The stator 12 is disposed inside the rotor housing 11. The motor shaft 13 passes through the rotor housing 11 and the stator 12 sequentially from one side and exits from the other side. The characteristic feature is that it further includes a heat dissipation component 2, which is disposed on the outside of the hub motor 1 and partially extends along the motor shaft 13 into the hub motor 1 and connects with the stator 12.

[0020] Preferably, the heat dissipation assembly 2 includes a heat-conducting bracket 21 and a heat sink 22. The heat-conducting bracket 21 is disposed between the stator 12 and the motor shaft 13, and the heat sink 22 is connected to the heat-conducting bracket 21.

[0021] Specifically, the heat sink 22 is equipped with heat dissipation fins, and the direction of the heat dissipation fin stripes is parallel to the ground. This design has the effect of low wind resistance and strong heat dissipation capacity.

[0022] More specifically, thermal grease is applied to the gap between the thermally conductive bracket 21 and the heat sink 22 to ensure the heat dissipation effect of the heat dissipation component 2.

[0023] Preferably, the heat-conducting bracket 21 extends a fixed end to the rotor housing 11, and the heat sink 22 is connected to the fixed end.

[0024] More specifically, the heat sink 22 is detachably connected to the fixed end with bolts, so it is easy to replace when the heat sink 22 is damaged.

[0025] Preferably, the hub motor 1 further includes a motor wire 14, and the heat-conducting bracket 21 has a heat dissipation groove 211, with the motor wire 14 disposed in the heat dissipation groove 211.

[0026] Specifically, the heat sink 211 can improve the heat dissipation effect of the heat conduction bracket 21, and is also used for heat dissipation of the motor wire 14.

[0027] Preferably, the hub motor 1 further includes a drying tube 15, which is also disposed within the heat dissipation groove 211.

[0028] Specifically, the drying tube 15 is used to exchange gases between the inside and outside of the hub motor 1 to ensure the dryness of the inside of the hub motor 1.

[0029] Preferably, the heat-conducting bracket 21 is also provided with a glue-filling area 212.

[0030] Specifically, after the motor wire 14 and the drying tube 15 are inserted into the hub motor 1, glue is injected into the glue injection area 212 for fixation, which also improves the waterproofness of the hub motor 1.

[0031] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A heat dissipation structure for a hub motor, comprising a hub motor (1), the hub motor (1) comprising a rotor housing (11), a stator (12) and a motor shaft (13), the stator (12) being disposed within the rotor housing (11), the motor shaft (13) passing sequentially through the rotor housing (11) and the stator (12) from one side and exiting from the other side, characterized in that: It also includes a heat dissipation component (2), which is disposed on the outside of the hub motor (1) and extends partly along the motor shaft (13) into the hub motor (1) and connects to the stator (12).

2. The heat dissipation structure for a hub motor according to claim 1, characterized in that: The heat dissipation assembly (2) includes a heat-conducting bracket (21) and a heat sink (22). The heat-conducting bracket (21) is disposed between the stator (12) and the motor shaft (13), and the heat sink (22) is connected to the heat-conducting bracket (21).

3. The heat dissipation structure for a hub motor according to claim 2, characterized in that: The heat-conducting bracket (21) extends a fixed end toward the rotor housing (11), and the heat sink (22) is connected to the fixed end.

4. The heat dissipation structure for a hub motor according to claim 2, characterized in that: The hub motor (1) also includes a motor wire (14), and a heat dissipation groove (211) is provided on the heat conduction bracket (21), and the motor wire (14) is disposed in the heat dissipation groove (211).

5. The heat dissipation structure for a hub motor according to claim 4, characterized in that: The hub motor (1) also includes a drying tube (15), which is also disposed in the heat dissipation groove (211).

6. The heat dissipation structure for a hub motor according to claim 2, characterized in that: The heat-conducting bracket (21) is also provided with a glue-filling area (212).

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