Double-air-duct heat dissipation structure of brush motor

Abstract

The utility model discloses a brush motor double air duct heat radiation structure, comprising a brush motor, the brush motor comprises a stator, a rotor and a brush plate, the rotor is provided with a commutator, two carbon brushes are symmetrically arranged at two sides of the commutator, the brush motor is arranged in a flange plate, the flange plate is provided with an air inlet, and the brush plate is provided with a plurality of air ducts. Two cooling air channels are arranged in the flange plate, the air inlet ends of the two cooling air channels are communicated with the air inlet, and the air outlet ends of the cooling air channels are opposite to the positions where the carbon brushes are arranged. According to the double-air-channel heat dissipation structure of the brush motor, the two cooling air channels are directly arranged on the flange plate, and the air inlet and the carbon brush are directly communicated through the cooling air channels, so that cooling air entering from the air inlet can be directly guided to the carbon brush to dissipate heat of the carbon brush, and a better cooling effect on the carbon brush can be achieved; therefore, the carbon brush can stably work for a long time, and the service life of the motor is prolonged.

Description

Technical Field

[0001] This utility model relates to a brushed motor, and more particularly to a brushed motor heat dissipation structure employing a dual-airflow design. Background Technology

[0002] A brushed motor is a rotating electric machine that converts electrical energy into mechanical energy (electric motor) or mechanical energy into electrical energy (generator) by incorporating brushes. It has advantages such as fast starting, timely braking, smooth speed regulation over a wide range, and relatively simple control circuitry, and is widely used in many fields. The structure of a brushed motor mainly includes a stator, rotor, and brush plate. Carbon brushes are mounted on the brush plate, and a commutator is installed on the rotor. During operation, the contact between the carbon brushes and the commutator continuously changes the direction of the current, enabling the rotor to rotate continuously.

[0003] During operation, the carbon brushes in a brushed motor experience continuous friction with the commutator, causing their temperature to rise steadily. Prolonged use can easily damage the carbon brushes, affecting the motor's lifespan. Therefore, heat dissipation is necessary for brushed motors. For example, a utility model patent (patent number CN202420762620.8) discloses a micro brushed motor structure, including a housing, stator, rotor, carbon brushes, and end caps. The carbon brushes are connected to a brush plate, which has a through-hole in the center that allows the rotor shaft to pass through. The brush plate is connected to the housing near the rotor fan blades, and ventilation holes are provided on the outer wall of the housing corresponding to the rotor fan blades to dissipate heat from the motor. However, this heat dissipation structure for brushed motors still has relatively poor cooling performance, thus requiring further improvement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a dual-airflow heat dissipation structure for brushed motors with good heat dissipation effect, which addresses the shortcomings of the prior art.

[0005] A dual-channel cooling structure for a brushed motor includes a brushed motor comprising a stator, a rotor, and a brush plate. The brush plate has two carbon brushes positioned opposite each other. A commutator is mounted on the rotor. The two carbon brushes are symmetrically arranged on both sides of the commutator and contact the commutator. The brushed motor is housed within a flange, which includes an upper end cover and a lower end cover. An air inlet is provided on the flange. Two cooling air channels are located within the flange. The air inlets of the two cooling air channels communicate with the air inlet, and the air outlets of the cooling air channels are positioned opposite to the carbon brushes.

[0006] Preferably, the two cooling air channels are arranged symmetrically.

[0007] Preferably, an adjustable air regulating plate is provided at the connection between the cooling air duct and the air inlet.

[0008] Preferably, a compression spring is provided on the side of the carbon brush away from the commutator.

[0009] Preferably, the brush plate is connected to the lower end cover of the flange via the motor housing.

[0010] Preferably, the motor housing is provided with a cooling air outlet that is positioned opposite to the air outlet of the cooling air channel.

[0011] The above technical solution has the following beneficial effects: The dual-airflow heat dissipation structure of the brushed motor has two cooling air channels directly set on the flange. The air inlet and carbon brush are directly connected through the cooling air channels. In this way, the cooling gas entering from the air inlet can be directly guided to the carbon brush to dissipate heat from the carbon brush, thereby achieving a better cooling effect on the carbon brush. This ensures that the carbon brush can work stably for a long time and extends the service life of the motor.

[0012] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external structure of an embodiment of the present utility model.

[0014] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model.

[0015] Figure 3 This is a schematic diagram of the cooling airflow in an embodiment of the present invention.

[0016] Original component numbering description: 1. Lower end cover; 2. Upper end cover; 3. Air inlet; 4. Cooling air channel; 5. Brush plate; 6. Carbon brush; 7. Commutator; 8. Air regulating plate; 9. Compression spring; 10. Motor housing. Detailed Implementation

[0017] The following specific embodiments illustrate the implementation methods disclosed in this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0018] like Figure 1 , 2 As shown, this utility model discloses a dual-channel heat dissipation structure for a brushed motor. The brushed motor includes a stator (not shown), a rotor, and brush plates. A commutator 7 is mounted on the rotor and can rotate with the rotor. The brushed motor is fixed inside a flange, which includes a lower end cover 1 and an upper end cover 2, forming a sealed cavity. The brush plate 5 is disposed inside the lower end cover 1, and a through hole for the commutator 7 to pass through is provided in the middle of the brush plate 5. Two carbon brushes 6 are provided on the brush plate 5, positioned opposite each other. The two carbon brushes 6 are symmetrically arranged on both sides of the commutator and contact the commutator 7. The carbon brushes 6 cooperate with the commutator 7 to conduct electricity and perform commutation, obtaining rotational torque through the rotating magnetic field to output kinetic energy. To improve the contact between the carbon brushes 6 and the commutator 7, a compression spring 9 is provided on the side of the carbon brush away from the commutator 7. The compression spring 9 provides pressure to the carbon brushes 6, ensuring better contact between them.

[0019] The flange 1 has an air inlet 3, and two cooling air channels 4 are also provided inside the flange 1. The cooling air channels 4 are separated by a partition set on the lower end cover 1, and the two cooling air channels 4 are symmetrically arranged. The air inlet end of the cooling air channel 4 is connected to the air inlet 1, and the air outlet end of the cooling air channel 4 corresponds to the position of the carbon brush 6. Figure 3 As shown, the dual-airflow cooling structure of the brushed motor has two cooling air channels directly set on the flange. When the cooling air enters the flange through the air inlet 3, the cooling air will reach the carbon brush along the two cooling air channels (in the direction shown by the arrow in the figure) to cool and dissipate heat. This can achieve a better cooling effect on the carbon brush.

[0020] In one specific implementation, the brush plate 5 can be fixedly connected to the lower end cover 1 of the flange via the motor housing 10. The motor housing 10 is provided with a cooling air outlet that is opposite to the air outlet of the cooling air channel. In this way, the gas flowing out of the cooling air channel will directly act on the brush plate 5 through the cooling air outlet to cool the brush plate 5.

[0021] In a preferred embodiment, an adjustable air regulating plate 8 is provided at the connection between the cooling air channel and the air inlet. By adjusting the height of the air regulating plate 8, the air intake of the two cooling air channels 4 can be controlled. In this way, the cooling airflow can be distributed according to the temperature of the positive and negative carbon brushes, thereby achieving a better cooling effect on the carbon brushes.

[0022] The dual-airflow cooling structure of this brushed motor features two cooling air channels directly installed on the flange. These channels connect the air inlet to the carbon brushes, allowing the cooling air entering through the air inlet to be directly guided to the carbon brushes for heat dissipation. This results in better cooling of the carbon brushes, ensuring stable operation for extended periods and extending the motor's lifespan.

[0023] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

Claims

1. A dual-channel heat dissipation structure for a brushed motor, comprising a brushed motor, the brushed motor including a stator, a rotor, and a brush plate, wherein the brush plate is provided with two carbon brushes positioned opposite each other, the rotor is provided with a commutator, and the two carbon brushes are symmetrically arranged on both sides of the commutator and in contact with the commutator, characterized in that, The brushed motor is housed in a flange, which includes an upper end cover and a lower end cover. The flange has an air inlet and two cooling air channels inside. The air inlets of the two cooling air channels are connected to the air inlet, and the air outlets of the cooling air channels are opposite to the positions where the carbon brushes are arranged.

2. The brushed motor dual-channel heat dissipation structure according to claim 1, characterized in that: The two cooling air channels are arranged symmetrically.

3. The brushed motor dual-channel heat dissipation structure according to claim 1, characterized in that: An adjustable air regulating plate is provided at the connection between the cooling air duct and the air inlet.

4. The brushed motor dual-channel heat dissipation structure according to claim 1, characterized in that: A compression spring is provided on the side of the carbon brush away from the commutator.

5. The brushed motor dual-channel heat dissipation structure according to claim 1, characterized in that: The brush plate is connected to the lower end cover of the flange via the motor housing.

6. The brushed motor dual-channel heat dissipation structure according to claim 5, characterized in that: The motor housing is provided with a cooling air outlet that is positioned opposite to the air outlet of the cooling air channel.

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