Direct-current brushless motor with fan heat dissipation structure

Abstract

The utility model discloses a direct-current brushless motor with a fan heat dissipation structure, which comprises a motor shell, a stator assembly and a fan heat dissipation structure, and is characterized in that the motor shell is internally provided with the stator assembly; the rotor assembly is arranged between the magnetic shoes of the stator assembly, and the two ends of the rotor assembly are fixed to the motor shell through bearings; the cooling fan is arranged at one end of the rotor assembly and is arranged in the motor shell; and the heat dissipation surface of the heat dissipation fan corresponds to the positions of the rotating ends of the positioning assembly and the rotor assembly. According to the utility model, the heat dissipation fan is arranged in the motor, and the heat dissipation surface of the heat dissipation fan corresponds to the position of the rotating end of the rotor assembly, so that heat generated in the motor can be effectively taken away, the working temperature of the motor is kept within a reasonable range, and the heat dissipation efficiency of the motor is improved; through effective heat dissipation, the internal temperature of the motor can be reduced, thermal aging of internal elements of the motor is reduced, and thus the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to a direct current brushless motor, in particular to a direct current brushless motor with a fan heat dissipation structure. Background Art

[0002] In the existing direct current brushless motor technology, certain heat will be generated during the operation of the motor. If the heat cannot be effectively dissipated, it will cause the internal temperature of the motor to rise, thereby affecting the efficiency and service life of the motor. Traditional direct current brushless motors usually rely on the natural heat dissipation of the motor housing. However, due to the limited heat dissipation area of the motor housing, the heat dissipation effect is not ideal. Traditional direct current brushless motors usually adopt a closed structure, and it is difficult for the heat generated inside the motor to be conducted to the external environment through the housing, resulting in an increase in the internal temperature of the motor and affecting the stable operation and service life of the motor.

[0003] External fans are used for heat dissipation, but such a design increases the external dimensions of the motor, and the connection structure between the fan and the motor is complex, which easily leads to an increase in installation and maintenance costs.

[0004] Regarding the thermal efficiency, some motors are provided with heat sinks or heat dissipation holes on the housing, but these designs still have certain limitations and cannot fully meet the heat dissipation requirements of the motor during high-load operation. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a direct current brushless motor with a fan heat dissipation structure to solve the problems existing in the background art.

[0006] The direct current brushless motor with a fan heat dissipation structure of the utility model is realized through the following technical solutions, including:

[0007] A motor housing, in which a stator assembly is arranged inside the motor housing;

[0008] A rotor assembly, which is placed between the magnetic tiles of the stator assembly, and both ends of the rotor assembly are fixed to the motor housing through bearings;

[0009] A heat dissipation fan, which is installed at one end of the rotor assembly and is placed inside the motor housing; the heat dissipation surface of the heat dissipation fan corresponds to the positions of the positioning assembly and the rotating end of the rotor assembly.

[0010] As a preferred technical solution, the motor housing includes an upper shell and a bottom shell;

[0011] The stator assembly is sleeved inside the upper shell, and the rotor assembly is also connected to the upper shell through the bearing at the upper end; the bottom shell is fixedly arranged below the upper shell, and the rotor assembly is connected to the bottom shell through the bearing at the lower end.

[0012] As a preferred technical solution, an air inlet is provided on the side below the upper shell, and the cooling fan draws air in from the air inlet; an air outlet is provided above the upper shell, and the heat of the rotor assembly and the stator assembly is dissipated through the air outlet.

[0013] As a preferred technical solution, a terminal block is provided on the side of the upper shell, and three-phase wires are connected to the terminal block.

[0014] As a preferred technical solution, the blades of the cooling fan are arranged in a trapezoidal structure.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. By arranging a cooling fan inside the motor in the present utility model, the heat dissipation surface of the cooling fan corresponds to the rotating end position of the rotor assembly, which can effectively take away the heat generated inside the motor, keep the working temperature of the motor within a reasonable range, and improve the heat dissipation efficiency of the motor; through effective heat dissipation, the internal temperature of the motor can be reduced, the thermal aging of the internal components of the motor can be reduced, and thus the service life of the motor can be extended.

[0017] 2. The motor housing of the present utility model includes an upper shell and a bottom shell. The stator assembly and the rotor assembly are respectively fixed on the upper shell and the bottom shell, and through the built-in cooling fan, the entire motor structure is more compact and space is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model;

[0020] Figure 2 It is an exploded structure schematic diagram of the present utility model;

[0021] Figure 3 It is a schematic diagram of the fan installation of the present utility model.

[0022] Description of the reference numerals:

[0023] 1. Stator assembly; 2. Rotor assembly; 3. Cooling fan; 4. Upper shell; 5. Bottom shell; 6. Air inlet; 7. Air outlet; 8. Terminal block; 9. Three-phase wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] All the features disclosed in this specification, or all the steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any manner.

[0025] As Figure 1 - Figure 2 shown, a brushless DC motor with a fan heat dissipation structure of the present utility model includes:

[0026] A motor housing, wherein a stator assembly 1 is arranged inside the motor housing;

[0027] A rotor assembly 2, which is placed between the magnetic tiles of the stator assembly 1, and both ends of the rotor assembly 2 are fixed to the motor housing through bearings;

[0028] A cooling fan 3, which is installed at one end of the rotor assembly 2 and is placed inside the motor housing; the heat dissipation surface of the cooling fan 3 corresponds to the position of the positioning assembly and the rotating end of the rotor assembly 2 to optimize the heat dissipation effect.

[0029] Among them, the motor housing includes an upper shell 4 and a bottom shell 5;

[0030] The stator assembly 1 is sleeved inside the upper shell 4, and the rotor assembly 2 is also connected to the upper shell 4 through the bearing at the upper end; the bottom shell 5 is fixedly arranged below the upper shell 4, and the rotor assembly 2 is connected to the bottom shell 5 through the bearing at the lower end.

[0031] Among them, an air inlet 6 is arranged on the side below the upper shell 4, and the cooling fan 3 sucks air from the air inlet 6; an air outlet 7 is arranged above the upper shell 4, and the heat generated by the rotor assembly 2 and the stator assembly 1 is dissipated through the air outlet 7 to maintain the working temperature of the motor.

[0032] In addition, a wiring seat 8 is arranged on the side of the upper shell 4, and a three-phase wire 9 is connected to the wiring seat 8 for power access and output of the motor; it is beneficial to the electrical connection of the motor, and at the same time, it is also convenient for the installation and maintenance of the motor.

[0033] As Figure 3 shown, the blades of the cooling fan 3 are arranged in a trapezoidal structure, which is beneficial to improving the air volume and air pressure of the cooling fan 3, thereby improving the heat dissipation effect.

[0034] By arranging a cooling fan inside the motor, and the heat dissipation surface of the cooling fan corresponds to the rotating end of the rotor assembly, the present utility model can effectively take away the heat generated inside the motor, keep the working temperature of the motor within a reasonable range, and improve the heat dissipation efficiency of the motor; through effective heat dissipation, the internal temperature of the motor can be reduced, the thermal aging of the internal components of the motor can be reduced, and thus the service life of the motor can be extended.

[0035] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be thought of without creative work should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

Claims

1. A brushless DC motor with a fan heat dissipation structure, characterized in that: include: A motor housing, wherein a stator assembly (1) is arranged inside the motor housing; A rotor assembly (2), wherein the rotor assembly (2) is disposed between the magnetic tiles of the stator assembly (1), and both ends of the rotor assembly (2) are fixed to the motor housing via bearings; A cooling fan (3) is installed at one end of the rotor assembly (2) and is placed in the motor housing; the cooling surface of the cooling fan (3) corresponds to the position of the rotation end of the positioning assembly and the rotor assembly (2).

2. The brushless DC motor with a fan heat dissipation structure according to claim 1, characterized in that: The motor housing comprises an upper housing (4) and a bottom housing (5); The stator assembly (1) is sleeved in the upper shell (4), and the rotor assembly (2) is also connected to the upper shell (4) via a bearing at the upper end; the bottom shell (5) is fixedly arranged below the upper shell (4), and the rotor assembly (2) is connected to the bottom shell (5) via a bearing at the lower end.

3. The brushless DC motor with a fan heat dissipation structure according to claim 2, characterized in that: An air inlet (6) is provided on the lower side of the upper shell (4), and the heat dissipation fan (3) takes in air from the air inlet (6); an air outlet (7) is provided on the upper side of the upper shell (4), and the heat of the rotor assembly (2) and the stator assembly (1) is dissipated through the air outlet (7).

4. The brushless DC motor with a fan heat dissipation structure according to claim 1, characterized in that: A wiring seat (8) is provided on the side of the upper shell (4), and a three-phase line (9) is connected to the wiring seat (8).

5. The brushless DC motor with a fan heat dissipation structure according to claim 1, characterized in that: The blades of the heat dissipation fan (3) are arranged in a trapezoidal structure.

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