Motor heat dissipation structure

Abstract

A motor heat dissipation structure is characterized in that a front end cover and a rear end cover of a motor are respectively provided with an air outlet hole and an air inlet hole, a stator core is provided with a first ventilation hole penetrating through the stator core along the axial direction, and a rotor core is provided with a second ventilation hole penetrating through the rotor core along the axial direction. And a third ventilation hole penetrating through the shaft body in the axial direction is formed in the shaft body of the rotor shaft. The rotor shaft is designed to be hollow and ventilated, so that the ventilation area in the motor is greatly increased, the position, close to the shaft core, in the motor can be effectively ventilated and cooled, and the overall cooling effect of the motor is further improved.

Description

Technical Field

[0001] The utility model relates to a motor, in particular to a motor heat dissipation structure. Background Art

[0002] Motors primarily consist of a housing, rotor, and stator. They are widely used in numerous fields, including industry, transportation, and household appliances. As the power source for various devices, the heat dissipation capacity of motors is a key quality parameter. This is especially true for motors with high power or those operating under high load for extended periods.

[0003] The technical solution disclosed in the patent document entitled "Heat dissipation structure of motor stator coil" (document number CN102664476A, hereinafter referred to as document 1) includes a stator assembly, a rotor assembly, an end cover and a machine base. The rotor assembly is connected to the stator assembly, the stator assembly is connected to the machine base, the end cover is fixedly connected to the machine base, the stator assembly includes a stator coil and a stator lamination, the stator coil is fixedly connected to the stator lamination, and the stator lamination has ventilation holes to increase the ventilation and heat dissipation capacity of the motor.

[0004] The technical solution disclosed in the patent document entitled "Motor Rotor Punching Sheet Structure" (document number CN202798204U, hereinafter referred to as Document 2) includes a punching sheet body, which has a mounting hole, and a plurality of T-shaped radial teeth on the outer periphery of the punching sheet body. Two adjacent radial teeth constitute a tooth groove. The punching sheet body is also provided with a plurality of ventilation holes, and the ventilation holes are waist-shaped.

[0005] In the prior art, a fan is typically installed at the rear of the motor. The rotation of the fan draws cool air from the outside through the rear cover of the motor into the housing and then out through the air holes in the front cover, thereby achieving ventilation and heat dissipation within the motor. To this end, Document 1 incorporates ventilation holes in the stator assembly to improve heat dissipation, while Document 2 achieves this by incorporating ventilation holes in the rotor punchings. While the solutions disclosed in the aforementioned documents can improve the heat dissipation capacity of the motor, the heat dissipation capacity at the center decreases as the position closer to the motor shaft core approaches, and the overall heat dissipation solution still needs to be improved. Summary of the Invention

[0006] The utility model provides a motor heat dissipation structure, which increases the ventilation and heat dissipation capacity of the motor shaft core and improves the overall heat dissipation effect.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted is: a motor heat dissipation structure, in which air outlet holes and air inlet holes are respectively provided on the front and rear end covers of the motor, a first ventilation hole is provided on the stator core and passes through the stator core in the axial direction, a second ventilation hole is provided on the rotor core and passes through the rotor core in the axial direction, and a third ventilation hole is provided in the shaft body of the rotor shaft and passes through the shaft body in the axial direction.

[0008] Compared with the existing technology, the technical effect of the present invention is: on the basis of opening a first ventilation hole on the stator iron core and a second ventilation hole on the rotor iron core, a third ventilation hole is provided in the shaft body of the rotor shaft, which penetrates the shaft body in the axial direction. The rotor shaft is hollow and ventilated, which greatly increases the ventilation area inside the motor. At the same time, the position close to the shaft core in the motor can also be effectively ventilated and dissipated, and the overall heat dissipation effect of the motor is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0010] The following is combined with Figure 1 And related content, the utility model is further described in detail:

[0011] A motor heat dissipation structure is provided, wherein an air outlet 111 and an air inlet 121 are respectively provided on the front and rear end covers 11 and 12 of the motor 10, a first ventilation hole 21 is provided on the stator core 20 and extends through the stator core 20 in an axial direction, a second ventilation hole 31 is provided on the rotor core 30 and extends through the rotor core 30 in an axial direction, and a third ventilation hole 41 is provided in the body of the rotor shaft 40 and extends through the body in an axial direction.

[0012] In the above scheme, a first ventilation hole 21 is provided in the stator core 20 along the axial direction of the motor, which can ventilate and dissipate heat in the area where the stator core 20 is located and its body. A second ventilation hole 31 is provided in the rotor core 30, which can ventilate and dissipate heat in the area where the rotor core 30 is located and its body. At the same time, a third ventilation hole 41 is provided in the body of the rotor shaft 40, which extends axially through the shaft body. The rotor shaft 40 is designed to be hollow and ventilated. The provision of the first, second, and third ventilation holes 21, 31, and 41 greatly increases the ventilation area within the motor 10. At the same time, the provision of the third ventilation hole 41 allows for effective ventilation and heat dissipation in the area near the shaft core of the motor 10, further improving the overall heat dissipation effect of the motor 10.

[0013] It should be noted that the fan at the rear of the motor 10 and its installation method are common technical knowledge in the motor field, and the fan will not be elaborated on here.

[0014] Furthermore, the rotor core 30 is sleeved onto the rotor shaft 40. The rotor shaft 40 has an elongated groove 42 formed along its axial direction. The ends of the groove 42 extend to the exterior of the rotor core 30. In this embodiment, air entering the motor 10 through the air inlet 121 on the rear end cover 12 of the motor 10 can enter the groove 42 through one open end, flow along its length, and then be discharged through the other open end. The provision of the groove 42 allows for ventilation and heat dissipation at the mating surface between the rotor core 30 and the rotor shaft 40, enhancing heat dissipation at the center of the motor 10.

[0015] As a preferred embodiment, the end surface of the front end cover 11 of the motor 10 is provided with a first air hole 111a extending axially through the cover body, and the circumferential surface of the front end cover 11 is provided with a second air hole 111b extending radially through the cover body. The first air hole 111a and the second air hole 111b together form the air outlet 111, which effectively improves the exhaust capacity of the front end cover 11, facilitates the rapid exhaust of air and heat dissipation within the motor 10, and also avoids the problem of excessive air holes on the end surface of the front end cover 11, which would affect its structural strength.

[0016] In order to ensure ventilation capacity in all directions on the front cover 11 , the first air holes 111 a and the second air holes 111 b are arranged at a circumferential interval on the front cover 11 , which is conducive to rapid exhaust and heat dissipation inside the motor 10 .

[0017] In addition, combined Figure 1 As shown, a partition 50 is provided on the inner circumferential surface of the front end cover 11 at the position of the second air hole 111b, and the plate surface of the partition 50 is opposite to the outlet of the first ventilation hole 21 and arranged at intervals. The side plate edge of the partition 50 adjacent to the second air hole 111b is connected to the middle position of the second air hole 111b, and the opposite side plate edge is in a free state. The plate surface of the partition 50 is staggered with the air outlet of the second ventilation hole 31 and the groove 42 in the radial direction of the motor 10.

[0018] In this embodiment, the purpose of the partition 50 is to guide the airflow discharged from the first ventilation hole 21 so that the airflow discharged from the first ventilation hole 21 is discharged through the second air hole 111b. At the same time, this airflow is separated from the airflow discharged from the second ventilation hole 31 and the groove 42. In this way, the airflow discharged from the second ventilation hole 31 and the groove 42 is radially guided by the inner end surface of the front end cover 11 and then directly discharged through the first air hole 111a and / or the second air hole 111b. The airflow discharged from the second ventilation hole 31 and the groove 42 will not flow back axially along the inner wall of the motor 10 housing and form an obstruction to the normal ventilation of the first ventilation hole 21, thereby ensuring the normal ventilation capacity of each ventilation hole.

Claims

1. A motor heat dissipation structure, wherein an air outlet (111) and an air inlet (121) are respectively provided on the front and rear end covers (11, 12) of the motor (10), a first ventilation hole (21) is provided on the stator core (20) and passes through the stator core (20) in an axial direction, and a second ventilation hole (31) is provided on the rotor core (30) and passes through the rotor core (30) in an axial direction, characterized in that: A third ventilation hole (41) is provided in the shaft body of the rotor shaft (40) and passes through the shaft body in the axial direction.

2. The motor heat dissipation structure according to claim 1, characterized in that: The rotor core (30) is sleeved on the rotor shaft (40). A long strip-shaped groove (42) is provided on the shaft wall of the rotor shaft (40) along the axial direction. Both ends of the groove (42) extend to the outside of both ends of the rotor core (30).

3. The motor heat dissipation structure according to claim 1, characterized in that: A first air hole (111a) penetrating the cover body in the axial direction is provided on the end surface of the front end cover (11) of the motor (10), and a second air hole (111b) penetrating the cover body in the radial direction is provided on the peripheral surface of the front end cover (11).

4. The motor heat dissipation structure according to claim 3, characterized in that: The first air hole (111a) and the second air hole (111b) are arranged at a circumferential interval on the front end cover (11).

5. The motor heat dissipation structure according to claim 3 or 4, characterized in that: A partition (50) is provided on the inner circumferential surface of the front end cover (11) at the location of the second air hole (111b); the plate surface of the partition (50) is opposite to the outlet of the first ventilation hole (21) and is arranged at intervals; a plate edge of the partition (50) adjacent to the second air hole (111b) is connected to the middle position of the second air hole (111b); and the plate surface of the partition (50) is staggered with the air outlet of the second ventilation hole (31) and the groove (42) in the radial direction of the motor (10).

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