Stator bracket of hub motor with cooling structure

Abstract

The utility model relates to a stator support of a hub motor with a cooling structure. The stator support comprises a stator mounting part, a connecting part, a shaft hole for arranging a motor shaft and a cooling pipeline, the stator mounting part is arranged on a circumferential surface taking the shaft hole as the center, and a connecting part is arranged in a space between the shaft hole and the stator mounting part; a cooling pipeline is arranged on the circumferential surface with the shaft hole as the center, the cooling pipeline and the stator mounting part are arranged in parallel, and a main water inlet and a main water outlet of the cooling pipeline are formed in the same side of the connecting part; and the cooling pipeline takes the main water inlet as a starting end and the main water outlet as a tail end, and is arranged in a snakelike shape along the left end and the right end of the stator mounting part on the circumferential surface taking the shaft hole as the center. According to the utility model, the cooling pipeline is arranged at the stator mounting part, the heat dissipation efficiency is high, the cooling pipeline cannot be damaged, the defects of complex cooling structure and difficult mounting in the prior art are overcome, the motor is simple and convenient to maintain, and the strength of the motor shaft is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hub motors, in particular to a stator bracket of a hub motor with a cooling structure. Background Art

[0002] In the existing outer rotor hub motor, the stator is installed on the stator bracket, and the stator bracket is fixed on the motor shaft. During the operation of the hub motor, the current passes through the stator coil to generate a large amount of heat. Part of the heat is transferred to the stator bracket through the stator, and the stator bracket then transfers it to the motor shaft to dissipate the heat into the air of the motor casing; the other part of the heat is the air in the motor cavity as a heat conduction medium, and the air in the cavity then transfers the heat to the left and right end covers, which absorb the heat in the cavity and dissipate it into the outside air. This heat dissipation method of the existing hub motor has poor overall heat dissipation effect due to the low thermal conductivity of the air and the small contact area between the stator bracket and the motor shaft, which makes the hub motor unable to work continuously at high power for a long time, reducing the riding experience. At the same time, the high temperature of the motor coil will also increase the coil resistance, reduce the motor efficiency, and shorten the vehicle's cruising range.

[0003] Chinese utility model patent CN 215871090 U discloses a hub motor cooling structure, in which a cooling pipe is provided inside the motor body, both ends of the cooling pipe extend outside the motor body, and are respectively connected to an external air filter and a vacuum pump, and the cooling pipe is arranged in a ring shape along the stator contour inside the motor body; or is spirally distributed on both sides of the stator, and two groups of spiral cooling pipes fall within two parallel planes.

[0004] This technical solution provides a solution for motor heat dissipation, but the structure of this solution is too complicated. It is not easy to coil the cooling pipes on two parallel surfaces on both sides of the stator. The operation is troublesome and difficult to assemble. The lead-out part of the cooling pipe is mixed with the stator lead-out wire. Once the motor fails, it is difficult to check and inconvenient to disassemble and assemble. Generally, the whole motor is scrapped and the cost of use is too high. Utility Model Content

[0005] The utility model aims to provide a stator bracket of a hub motor with a cooling structure, which solves the defects of the prior art that the cooling structure is complicated and difficult to install, and also eliminates the safety hazard that the motor shaft strength is weakened and easy to break due to the outlet wire of the prior art motor shaft.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] A stator bracket of a hub motor with a cooling structure, comprising a stator mounting portion, a connecting portion, an axial hole for arranging a motor shaft, and a cooling pipeline;

[0008] The stator mounting portion is arranged on a circumferential surface centered on the shaft hole, and a connecting portion is arranged in the space between the shaft hole and the stator mounting portion;

[0009] A cooling pipe is arranged on a circumferential surface centered on the shaft hole. The cooling pipe is arranged parallel to the stator mounting portion. A total water inlet and a total water outlet of the cooling pipe are arranged on the same side of the connecting portion. The cooling pipe has the total water inlet as a starting end and the total water outlet as an end. The cooling pipe is arranged in a serpentine shape on the left and right ends of the stator mounting portion on a circumferential surface centered on the shaft hole.

[0010] The cooling pipeline is arranged at the stator installation part, and the cooling pipeline is composed of pipeline units interconnected from the main water inlet to the main water outlet. The pipeline unit is a pipeline that passes through the left and right ends of the stator installation part.

[0011] Each pipeline unit includes a sub-water inlet and a sub-water outlet; the sub-water outlet of any pipeline unit and the sub-water inlet of the previous pipeline unit are respectively arranged at the two ends of the stator bracket and are interconnected; the sub-water inlet of any pipeline unit and the sub-water outlet of the next pipeline unit are respectively arranged at the two ends of the stator bracket and are interconnected.

[0012] A sink recessed in the end surface of the stator mounting portion is arranged between the sub-water inlet and the sub-water outlet of each pipeline unit.

[0013] Waterway cover plates covering the sink grooves are arranged on both end surfaces of the stator mounting portion.

[0014] The connection part is provided with a terminal; the stator lead wire is connected to the terminal.

[0015] The motor shaft is integrally formed with the stator mounting portion and the connecting portion.

[0016] The utility model has the following advantages: 1. The stator is installed on the outside of the stator mounting part, which increases the contact surface between the stator and the stator bracket and improves the heat dissipation efficiency; 2. The cooling water cooling pipeline is arranged on the stator bracket. After the stator is damaged, the cooling pipeline does not hinder the disassembly and assembly of the stator, and the maintenance is convenient; 3. The cooling pipeline is a pipeline that is arranged in the stator mounting part and passes through it. As long as the stator mounting part is not damaged, the cooling pipeline will not be damaged, and the heat generated by the stator will be more directly and quickly taken away by the cooling water, and the heat dissipation effect is extremely high; 4. The connecting part is provided with a terminal, and the stator lead wire is led out through the terminal, and there is no need to set a wire hole for leading out the lead wire on the motor shaft, so that the strength of the motor shaft is greatly increased; 5. The terminal arrangement of the connecting part enables the motor shaft and the stator bracket to be formed in one piece, so that the strength of the stator assembly is further increased; 6. The terminal arrangement of the connecting part enables the stator of the motor to be disassembled and replaced. When the motor stator is damaged, the motor is no longer scrapped as a whole, but can be restored by replacing the stator, thereby reducing user costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the outer rotor hub motor of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the left end surface of the stator bracket of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the right end surface of the stator bracket of the utility model.

[0020] Figure 4 It is a schematic diagram of the plane development of the cooling pipeline of the utility model.

[0021] Figure 5 It is an exploded view of the stator assembly structure of the utility model.

[0022] In the figure: 1- stator bracket; 11- stator mounting portion; 12-connecting portion; 13-shaft hole; 14-terminal; 141-terminal mounting hole; 2-stator; 21-stator cover; 3-motor shaft; 4-cooling pipe; 41-main water inlet; 411-sub-water inlet; 42-main water outlet; 421-sub-water outlet; 43-pipe unit; 44-sink; 5-water channel cover. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings. The accompanying drawings are only used for exemplary description and cannot be understood as limiting the present patent.

[0024] In order to more concisely describe the present embodiment, some parts known to those skilled in the art but not related to the main content of the present invention are omitted in the drawings or descriptions. In addition, for the convenience of description, some parts in the drawings are omitted, enlarged or reduced, but they do not represent the size or entire structure of the actual product.

[0025] The utility model provides a stator bracket of a hub motor with a cooling structure, such as Figure 1 As shown, the stator bracket 1 includes an axial hole 13, a connecting portion 12 and a stator mounting portion 11. The axial hole 13 is arranged at the center of the stator bracket 1, and the stator mounting portion 11 is arranged on a circumferential surface centered on the axial hole 13. The connecting portion 12 is arranged in the space between the stator mounting portion 11 and the axial hole 13. The motor shaft 3 is arranged in the axial hole 13, and the stator 2 is arranged on the stator mounting portion 11. The stator 2 is sleeved on the outside of the stator mounting portion 11 and fixed by the stator cover 22.

[0026] Preferably, if Figure 1As shown, the cross section of the stator bracket 1 is wide outside and narrow inside, the width of the stator mounting portion 11 is greater than the connecting portion 12, and the width of the stator 2 is adapted to the width of the stator mounting portion 11. The stator mounting portion 11 is relatively wide, and the stator 2 is sleeved on the outer surface of the stator mounting portion 11 and fixed by the stator cover 22, so that the contact area between the stator 2 and the stator mounting portion 11 is large, and the heat dissipation efficiency through the stator bracket 1 is greatly improved.

[0027] like Figure 2-4 As shown, a cooling pipe 4 is arranged on a circumferential surface centered on the shaft hole 13, and the cooling pipe 4 is arranged parallel to the stator mounting portion 11; the cooling pipe 4 is provided with a total water inlet 41 and a total water outlet 42, and the total water inlet 41 and the total water outlet 42 are arranged on the same side of the connecting portion 12. The total water inlet 41 and the total water outlet 42 are connected to the water tank outside the motor, and the water tank outside the motor and the cooling pipe 4 form a circulating cooling mechanism, which takes away the heat generated by the stator 2 through the circulating cooling mechanism of the cooling pipe 4 and the water tank.

[0028] The cooling pipe 4 starts at the main water inlet 41 and ends at the main water outlet 42. On the circumferential surface centered on the shaft hole 13, it is arranged in a serpentine shape along the left and right ends of the stator mounting part 11. That is, the left and right ends of the stator mounting part 11 are used as turning points, and the main water inlet 41 is used as the starting point. It is arranged in a serpentine shape from left to right and then from left to right of the stator mounting part 11, and finally reaches the main water outlet 42, forming a complete serpentine cooling pipe 4 on the circumferential surface.

[0029] like Figure 4 As shown in the planar unfolded view of the cooling pipe 4, each pipe unit 43 includes a sub-water inlet 411, a sub-water outlet 421 and a connected pipe; the sub-water outlet 421 of any pipe unit 43 and the sub-water inlet 411 of the connected previous pipe unit 43 are respectively arranged at both ends of the stator bracket 1 and are interconnected; similarly, the sub-water inlet 411 of any pipe unit 43 and the sub-water outlet 421 of the connected next pipe unit 43 are respectively arranged at both ends of the stator bracket 1 and are interconnected.

[0030] Preferably, if Figure 2 , Figure 3 As shown, the cooling pipe 4 is arranged at the stator installation part 11 , and the cooling pipe 4 is composed of a pipe unit 43 interconnected from a total water inlet 41 to a total water outlet 42 ; the pipe unit 43 is a pipe that passes through the left and right ends of the stator installation part 11 .

[0031] Furthermore, a sink 44 is provided between the sub-water inlet 411 and the sub-water outlet 421 of each pipe unit 43, and the sink 44 is provided at the bottom of the end surface of the stator mounting portion 11. In order to form a closed cooling pipe 4, a waterway cover plate 5 covering the sink 44 is provided on both end surfaces of the stator mounting portion 11. In this way, the motor external water tank is connected to the main water inlet 41 and the main water outlet 42, and together with the cooling pipe 4, a closed motor water cooling system is formed.

[0032] like Figure 2 , Figure 5 As shown, the connecting portion 12 is provided with a terminal mounting hole 141, and the terminal 14 is arranged on the connecting portion 12 through the terminal mounting hole 141. In this way, the stator lead wire does not need to be led out from the outlet hole on the motor shaft 3 as in the prior art, but is connected to the terminal 14 and connected to the battery outside the motor through the terminal 14. In this way, the motor shaft 3 does not need to be provided with a hollow outlet hole, and the strength is greatly enhanced.

[0033] In addition, the arrangement of the terminal 14 makes the installation of the motor stator 2 more convenient, and the stator 2 can be replaced after being damaged. Once the stator 2 of the motor is damaged, it will no longer cause the entire motor to be scrapped. The motor can be repaired by simply replacing the stator 2, which greatly reduces the user's use cost and greatly improves the use rate and service life of the motor.

[0034] Moreover, the motor shaft 3 can be integrally formed with the stator mounting portion 11 and the connecting portion 12 , that is, integrally formed with the stator bracket 1 , so that the strength of the entire stator bracket 1 is greatly increased.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application scope of the present invention should be within the technical scope of the present invention.

Claims

1. A stator bracket of a hub motor with a cooling structure, characterized in that: It comprises a stator mounting portion (11), a connecting portion (12), an axial hole for arranging a motor shaft (3), and a cooling pipeline (4); The stator mounting portion (11) is arranged on a circumferential surface centered on the shaft hole (13), and a connecting portion (12) is arranged in the space between the shaft hole (13) and the stator mounting portion (11); A cooling pipe (4) is arranged on a circumferential surface centered on the shaft hole (13); the cooling pipe (4) is arranged parallel to the stator mounting portion (11); a total water inlet (41) and a total water outlet (42) of the cooling pipe (4) are arranged on the same side of the connecting portion (12); the cooling pipe (4) has the total water inlet (41) as a starting end and the total water outlet (42) as an end, and is arranged in a serpentine shape at the left and right ends of the stator mounting portion (11) on a circumferential surface centered on the shaft hole (13).

2. The stator bracket of the hub motor with a cooling structure according to claim 1, characterized in that: The cooling pipeline (4) is arranged on the stator mounting portion (11), and the cooling pipeline (4) is composed of a pipeline unit (43) which is interconnected from the main water inlet (41) to the main water outlet (42), and the pipeline unit (43) is a pipeline which passes through the left and right ends of the stator mounting portion (11).

3. The stator bracket of the hub motor with a cooling structure according to claim 2, characterized in that: Each pipeline unit (43) comprises a sub-water inlet (411) and a sub-water outlet (421); the sub-water outlet (421) of any pipeline unit (43) and the sub-water inlet (411) of the previous pipeline unit (43) are respectively arranged at two ends of the stator support (1) and are interconnected; the sub-water inlet (411) of any pipeline unit (43) and the sub-water outlet (421) of the next pipeline unit (43) are respectively arranged at two ends of the stator support (1) and are interconnected.

4. The stator bracket of the hub motor with a cooling structure according to claim 3, characterized in that: A recessed groove (44) recessed into the end surface of the stator mounting portion (11) is provided between the sub-water inlet (411) and the sub-water outlet (421) of each pipeline unit (43).

5. The stator bracket of the hub motor with a cooling structure according to claim 4, characterized in that: Waterway cover plates (5) covering the sink grooves (44) are provided on both end surfaces of the stator mounting portion (11).

6. The stator bracket of the hub motor with cooling structure according to claim 1, characterized in that: The connecting portion (12) is provided with a terminal post (14); the stator lead wire is connected to the terminal post (14).

7. The stator bracket of the hub motor with cooling structure according to claim 1, characterized in that: The motor shaft (3) is integrally formed with the stator mounting portion (11) and the connecting portion (12).

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