PCB (Printed Circuit Board) high-efficiency heat dissipation structure of ground treasure hub motor

Abstract

The utility model discloses a PCB board high-efficiency heat radiation structure of a ground treasure wheel hub motor, comprising a housing, an outer rotor, a stator, a support, two bearings and a rotating shaft are successively arranged in the housing, the two bearings are respectively sleeved on the upper end and the lower end of the rotating shaft, and the lower end of the support is provided with a PCB board. The beneficial effects of the utility model are that the PCB is installed on the end face of the aluminum support in an embedded manner, so that the temperature rise of components of the PCB is reduced, the requirements are met, the aging speed of the motor is reduced and the service life of the motor is prolonged through the reduction of the temperature of the components, and in addition, the friction force and heat generation are also reduced through grease sealing, and the efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hub motors, in particular to a PCB board high-efficiency heat dissipation structure of a Deebao hub motor. Background Art

[0002] The existing assembly structure of the drive wheel hub motor PCB board is as follows Figure 5 As shown, the bracket is difficult to process and the assembly process is complicated. The inner hole of the bracket is coated with glue, and the drive end bearing is first slid into the bracket. After it is left to stand and the glue is fixed, glue is applied to the bracket again and the non-drive end bearing is slid into the bracket. The outer ring of the bracket is then coated with glue and installed into the inner ring of the stator (clearance fit). After it is left to stand and the glue is cured, the next assembly step is carried out. This assembly method has high requirements for parts, high dependence on glue, and many assembly processes. Since each part needs to stand and wait for the glue to cure, the production cycle is long, resulting in low production line efficiency and low production capacity. Utility Model Content

[0003] The purpose of the present invention is to provide a high-efficiency heat dissipation structure of a PCB board of a Deebao hub motor to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a high-efficiency heat dissipation structure for the PCB board of a Deebao hub motor, comprising a housing, wherein an outer rotor, a stator, a bracket, a bearing and a rotating shaft are sequentially arranged in the housing, wherein there are two bearings, which are respectively mounted on the upper and lower ends of the rotating shaft, and a PCB board is provided at the lower end of the bracket.

[0005] For further optimization, end covers are provided at the upper ends of the outer rotor, stator and bracket.

[0006] Further optimized, sealing grease is coated between the end cover and the bracket.

[0007] Further optimized, the other end of the bracket away from the end cover is coated with thermal grease.

[0008] Further optimized, the bracket is located in the middle of the stator, and a circular groove for mounting the PCB board is opened on its end surface.

[0009] Further optimized, the end surface of the circular groove is symmetrically provided with a plurality of threaded holes for mounting the PCB board.

[0010] Beneficial effects

[0011] The utility model provides a high-efficiency heat dissipation structure for the PCB board of the Deebao hub motor. By embedding the PCB board in the end face of the aluminum bracket, the temperature rise of the PCB components is reduced to meet the requirements. By reducing the temperature of the components, the aging rate of the motor is reduced and the service life of the motor is increased. In addition, the grease sealing also reduces the friction and heat generation, thereby improving the efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic cross-sectional view of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the assembly of the PCB board and the stator of the utility model;

[0014] Figure 3 This is a schematic diagram of the bracket and stator structure of the utility model;

[0015] Figure 4 This is a schematic diagram of the PCB board structure of the present utility model;

[0016] Figure 5 This is a schematic diagram of the assembly of a PCB board and a hub motor in the prior art. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] Example

[0019] like Figure 1-4 As shown, a high-efficiency heat dissipation structure of the PCB board of a Deebao hub motor includes a housing 1, in which an outer rotor 5, a stator 6, a bracket 7, a bearing 4 and a rotating shaft 10 are sequentially arranged. There are two bearings 4, which are respectively mounted on the upper and lower ends of the rotating shaft 10. A PCB board 9 is provided at the lower end of the bracket 7.

[0020] In this embodiment, an end cover 2 is provided at the upper ends of the outer rotor 5, the stator 6 and the bracket 7. The end cover 2 seals the motor to prevent dust and debris from entering, thereby increasing the service life of the hub motor.

[0021] Sealing grease 3 is coated between the end cover 2 and the bracket 7. The seal between the end cover 2 and the aluminum bracket 7 is changed from a rubber ring structure to a sealing grease 3 seal, which further reduces the heat generation in the aluminum bracket.

[0022] The other end of the bracket 7 away from the end cover 2 is coated with thermal grease 8 to achieve the conduction and dissipation of heat from high-temperature components.

[0023] The bracket 7 is located in the middle of the stator 6 , and a circular groove 11 for mounting the PCB board 9 is opened on its end surface. A plurality of threaded holes for mounting the PCB board 9 are symmetrically opened on the end surface of the circular groove 11 .

[0024] The aluminum bracket is embedded in the stator, and thermal grease is injected into the mounting surface of the aluminum bracket and the PCB. The side of the PCB with the high-temperature components MCU and MOS is then embedded with thermal grease, and the PCB and aluminum bracket are fixed with screws. At the same time, the seal between the end cap and the aluminum bracket is changed from a rubber ring structure to a grease-filled seal, further reducing heat generation in the aluminum bracket and achieving heat conduction and dissipation of high-temperature components.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A PCB board efficient heat dissipation structure of a Deebao hub motor, characterized by: The invention comprises a housing (1), wherein an outer rotor (5), a stator (6), a bracket (7), a bearing (4) and a rotating shaft (10) are arranged in sequence inside the housing (1), wherein two bearings (4) are respectively mounted on the upper end and the lower end of the rotating shaft (10), and a PCB board (9) is arranged at the lower end of the bracket (7).

2. The PCB board efficient heat dissipation structure of the Deebao hub motor according to claim 1 is characterized in that: The upper ends of the outer rotor (5), the stator (6) and the bracket (7) are provided with end covers (2).

3. The PCB board efficient heat dissipation structure of the Deebao hub motor according to claim 2 is characterized by: Sealing grease (3) is coated between the end cover (2) and the bracket (7).

4. The PCB board efficient heat dissipation structure of the Deebao hub motor according to claim 2 is characterized by: The other end of the bracket (7) away from the end cover (2) is coated with thermal conductive silicone grease (8).

5. The PCB board efficient heat dissipation structure of the Deebao hub motor according to claim 1 is characterized in that: The bracket (7) is located in the middle of the stator (6), and a circular groove (11) for mounting the PCB board (9) is provided on its end surface.

6. The PCB board efficient heat dissipation structure of the Deebao hub motor according to claim 5 is characterized in that: The end surface of the circular groove (11) is symmetrically provided with a plurality of threaded holes for mounting the PCB board (9).

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