Small high-speed motor with active heat dissipation

Abstract

The utility model discloses a motor heat dissipation technical field's a kind of small high-speed motor with active heat dissipation, including backplate, stator, rotor and shell, and the rotor and shell are all provided with several annular array distribution's heat dissipation port, the side of the rotor away from backplate is equipped with side plate and the center of side plate is equipped with the output shaft coaxial with rotor, side plate penetrates shell and is rotatably connected with shell, and the output shaft is sleeved with air intake mechanism by connecting sleeve, air intake mechanism is used to ventilate from center to the space inside the rotor, and the air intake mechanism is communicated with the air vent in the side plate. The small high-speed motor with active heat dissipation, through the cooperation of air intake turbine fan, air guide seat and exhaust turbine fan, the effect that guiding airflow diffuses from inside to outside through the stator and rotor of motor is realized, so that each part on the stator and rotor can be evenly contacted with airflow, and the degree of ventilation and heat dissipation condition is obtained, which is conducive to improving the overall heat dissipation efficiency of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor heat dissipation technology, specifically to a small high-speed motor with active heat dissipation. Background Technology

[0002] Existing brushless motors mainly consist of a stator, rotor, housing, and output shaft. During continuous operation, heat is generated and gradually accumulates on the stator and rotor, causing the internal temperature of the motor to rise. Excessive temperature not only increases the resistance of the motor windings, leading to reduced motor efficiency and increased energy consumption, but may also cause demagnetization of the permanent magnets inside the motor, resulting in decreased stability of the motor's output torque and speed, and even causing permanent damage to the motor.

[0003] Existing small and medium-sized brushless motors primarily rely on through-holes in the casing to provide ventilation, thereby enhancing air-cooling performance. Some higher-performance motors are equipped with additional ventilation mechanisms to further improve airflow efficiency. However, existing motor designs for air-cooling only consider how to provide entry and exit pathways for airflow, neglecting the internal flow of airflow and the uniformity of contact between the airflow and various parts of the stator and rotor. While sufficient ventilation can fill the motor's internal space to ensure uniform heat dissipation, insufficient ventilation prevents complete coverage, leading to uneven heat dissipation and localized heat buildup. This phenomenon also degrades and damages motor performance. Therefore, this invention proposes a small high-speed motor with active cooling. Utility Model Content

[0004] The purpose of this invention is to provide a small high-speed motor with active heat dissipation in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions: This utility model provides a small high-speed motor with active heat dissipation, including a back plate, a stator disposed on the back plate, a rotor sleeved on the outside of the stator, and a housing sleeved on the outside of the rotor and fixed to the back plate. Both the rotor and the housing have a number of heat dissipation vents arranged in a ring array. A side plate is provided on the side of the rotor away from the back plate, and an output shaft coaxial with the rotor is provided at the center of the side plate. The side plate is rotatably connected to the housing. An air intake mechanism is sleeved on the output shaft through a connecting sleeve. The air intake mechanism is used to ventilate the space inside the rotor.

[0006] As a further optimization of this utility model, the air intake mechanism includes an air guide seat and an air intake turbine fan disposed inside the air guide seat.

[0007] As a further optimization of this utility model, the air guide seat includes a flat plate portion and an annular cover portion sleeved on the flat plate portion. The air inlet turbine fan is located inside the annular cover portion and in front of the flat plate portion. Several L-shaped air guide grooves are opened inside the air guide seat. An air inlet communicating with the air guide grooves is opened on the inner side wall of the annular cover portion. An air outlet communicating with the air guide grooves is opened on the back side of the flat plate portion. A ventilation port cooperating with the air outlet is opened inside the side plate.

[0008] As a further optimization of this utility model, the fan blades of the air intake turbine fan have a trapezoidal structure and the front end of the fan blades protrudes from the air guide seat.

[0009] As a further optimization of this utility model, an exhaust turbine fan is provided on the outside of the rotor.

[0010] As a further optimization of this utility model, filters are provided at the heat dissipation vents on the outer shell and the air inlets on the air guide seat.

[0011] The beneficial effects of this utility model are as follows: 1. The small high-speed motor with active heat dissipation provided by this utility model, through the cooperation of the air intake mechanism, back plate and rotor, achieves the effect of providing a directional path for the airflow entering the space where the stator and rotor are located. This allows the airflow to concentrate first at the center of the stator and rotor, then diffuse outward, and finally be discharged from the outer edge. Compared with the scheme of airflow flowing in and out over a wide range, it can avoid the phenomenon that the airflow fails to make full contact with the stator and rotor and passes through quickly along a short path. It expands the coverage of the airflow, so that all parts of the stator and rotor can make uniform contact with the airflow, improve the uniformity of heat dissipation, and avoid the problem of local heat accumulation. 2. By installing an exhaust turbine fan outside the rotor, an enveloping and evenly distributed external suction force is applied to the airflow entering the rotor, which improves the consistency of the probability of airflow being discharged from all directions. This helps to guide the airflow to flow to various parts of the stator and rotor, and can further improve the uniformity of heat dissipation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall appearance of the present utility model; Figure 2 This is a schematic diagram showing the structural breakdown of this utility model; Figure 3 A schematic diagram showing the separation of the air guide seat and the air intake turbine fan; Figure 4 This is a side sectional view of the air guide seat.

[0013] In the diagram: 1. Back plate; 2. Outer shell; 3. Stator; 4. Rotor; 5. Side plate; 6. Output shaft; 7. Air guide seat; 701. Ring cover; 702. Flat plate; 703. Air guide groove; 8. Inlet turbine fan; 9. Air inlet; 10. Exhaust outlet; 11. Connecting sleeve; 12. Ventilation port; 13. Exhaust turbine fan. Detailed Implementation

[0014] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0015] Example 1 like Figure 1-4 As shown, the small high-speed motor with active heat dissipation in this embodiment includes a back plate 1, a stator 3 disposed on the back plate 1, a rotor 4 sleeved on the outside of the stator 3, and a housing 2 sleeved on the outside of the rotor 4 and fixed to the back plate 1. The terminal block of the stator 3 is fixed on the back plate 1. Both the rotor 4 and the housing 2 are provided with a plurality of heat dissipation vents arranged in a ring array. The side of the rotor 4 away from the back plate 1 is provided with a side plate 5 and an output shaft 6 coaxial with the rotor 4 is provided at the center of the side plate 5. The side plate 5 is rotatably connected to the housing 2. An air intake mechanism is sleeved on the output shaft 6 through a connecting sleeve 11. The air intake mechanism is used to ventilate the space inside the rotor 4.

[0016] The air intake mechanism includes an air guide seat 7 and an air intake turbine fan 8 located inside the air guide seat 7.

[0017] After the high-speed motor is turned on, the air intake mechanism, which is formed by connecting the air guide seat 7 and the air intake turbine fan 8, rotates synchronously with the rotor 4. The airflow caused by the rotation of the air intake turbine fan 8 is injected into the air guide seat 7, and then enters the rotor 4 through the ventilation port 12. It then diffuses from the center to the periphery within the rotor 4. During this process, all parts of the stator 3 and the rotor 4 can come into uniform contact with the airflow, which can effectively avoid the problem of local heat accumulation and enhance the heat dissipation effect by improving the uniformity of heat dissipation.

[0018] Preferably, the air guide seat 7 includes a flat plate portion 702 and an annular cover portion 701 sleeved on the flat plate portion 702. The air inlet turbine fan 8 is located inside the annular cover portion 701 and in front of the flat plate portion 702. The air guide seat 7 has a plurality of L-shaped air guide grooves 703. The inner side wall of the annular cover portion 701 has an air inlet 9 communicating with the air guide grooves 703. The back side of the flat plate portion 702 has an exhaust port 10 communicating with the air guide grooves 703. The side plate 5 has a ventilation opening 12 that cooperates with the exhaust port 10. When the intake turbine fan 8 rotates, centrifugal force injects airflow into the air guide slot 703. The airflow gathers from the outside to the inside along the air guide slot 703 and then passes through the exhaust slot 10 and the ventilation vent 12 in sequence before entering the space inside the rotor 4. Through the cooperation of the intake turbine fan 8 and the air guide slot 703, a large amount of directional airflow can be formed, achieving efficient ventilation in the space where the stator 3 and rotor 4 are located.

[0019] Preferably, the blades of the intake turbine fan 8 are trapezoidal and the front end of the blades protrudes from the air guide seat 7. The trapezoidal mechanism has a larger contact area between the blades and the air, resulting in higher air guiding efficiency.

[0020] Preferably, an exhaust turbine fan 13 is provided on the outside of the rotor 4. The exhaust turbine fan 13 on the outside of the rotor 4 rotates synchronously with the rotor 4, which can improve the exhaust efficiency of the airflow inside the rotor 4, further accelerate the heat dissipation efficiency, and the external suction force on the airflow in each part is evenly distributed, so that the airflow input from the center can be evenly diffused to the outside and discharged, which can ensure that the airflow is evenly distributed in the space where the stator 3 and the rotor 4 are located. The fan blades of the exhaust turbine fan 13 are preferably made of heat-conducting plates, which helps the heat on the stator 3 and rotor 4 to quickly accumulate on the fan blades, thereby accelerating the heat dissipation efficiency.

[0021] Preferably, filters are provided at the heat dissipation vent on the outer casing 2 and the air inlet 9 on the air guide seat 7. The filters can block external dust and impurities.

[0022] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A small high-speed motor with active heat dissipation, comprising a back plate (1), a stator (3) disposed on the back plate (1), a rotor (4) sleeved on the outside of the stator (3), and a housing (2) sleeved on the outside of the rotor (4) and fixed to the back plate (1), characterized in that: Both the rotor (4) and the outer shell (2) are provided with a number of heat dissipation vents arranged in a ring array. The rotor (4) is provided with a side plate (5) on the side away from the back plate (1), and an output shaft (6) coaxial with the rotor (4) is provided at the center of the side plate (5). The side plate (5) is rotatably connected to the outer shell (2). An air intake mechanism is sleeved on the output shaft (6) through a connecting sleeve (11). The air intake mechanism is used to ventilate the space inside the rotor (4). The air intake mechanism includes an air guide seat (7) and an air intake turbine fan (8) located inside the air guide seat (7). The air guide seat (7) includes a flat plate (702) and an annular cover (701) sleeved on the flat plate (702). The air intake turbine fan (8) is located inside the annular cover (701) and in front of the flat plate (702). The air guide seat (7) has several L-shaped air guide grooves (703). The inner wall of the annular cover (701) has an air inlet (9) communicating with the air guide grooves (703). The back side of the flat plate (702) has an exhaust port (10) communicating with the air guide grooves (703). The side plate (5) has a ventilation port (12) that cooperates with the exhaust port (10).

2. The small high-speed motor with active heat dissipation according to claim 1, characterized in that: The blades of the intake turbine fan (8) are trapezoidal and the front end of the blades protrudes from the air guide seat (7).

3. A small high-speed motor with active heat dissipation according to claim 1, characterized in that: The rotor (4) is provided with an exhaust turbine fan (13) on its outer side.

4. A small high-speed motor with active heat dissipation according to claim 1, characterized in that: The heat dissipation vent on the outer shell (2) and the air inlet (9) on the air guide seat (7) are both equipped with filters.

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