Brushless suction motor with cooling structure

Abstract

The utility model discloses a brushless suction motor with a cooling structure, and the motor comprises a housing assembly which is internally provided with an accommodation chamber; the rotor assembly is installed in the containing chamber and comprises an integrated rotor, the integrated rotor comprises a rotating shaft, and the rotating shaft is sleeved with a plurality of bearings; the stator assembly is installed on the shell assembly, and the rotating shaft penetrates through the stator assembly; the cooling assembly comprises a cooling fan installed on the rotating shaft, and the cooling fan is located between the bearings. The utility model has the beneficial effects that the cooling effect is improved, the service life is prolonged, the assembly is convenient, and the noise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a brushless suction motor with a cooling structure. Background Technology

[0002] A brushless motor is an electromechanical integrated product. Compared to traditional brushed motors, brushless motors have advantages such as low noise, high energy efficiency, and durability. Because the motor rotates at high speeds during operation, it generates heat, and excessive heat can affect the motor's lifespan. Conventional brushless suction motors on the market typically have a fan at the top or bottom for cooling. For example, invention patent application number 2013101225915 discloses a brushless motor with a fan located on the underside of the cover. The fan exhausts air through the gap between the stator and rotor. This cooling method is inefficient, increases the difficulty of motor installation, generates noise, and shortens the motor's lifespan. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a brushless suction motor with a cooling structure, which is easy to install, has a good cooling effect, low noise, and effectively extends the service life of the motor.

[0004] Specifically, this utility model discloses a brushless suction motor with a cooling structure, comprising:

[0005] The housing assembly has an internal receiving chamber;

[0006] A rotor assembly, installed in a housing, includes an integral rotor, the integral rotor including a shaft on which multiple bearings are fitted;

[0007] A stator assembly is mounted on the housing assembly, and the rotating shaft passes through the stator assembly;

[0008] A cooling assembly includes a cooling fan mounted on the shaft, the cooling fan being located between the bearings.

[0009] The advantages of adopting the above technical solution are that it improves cooling effect, extends service life, facilitates assembly, and reduces noise.

[0010] Furthermore, there are two bearings, with a spring between the two bearings, the cooling fan is installed inside the spring, and pressure rings are provided on the upper and lower sides of the bearings.

[0011] The advantage of adopting the above technical solution is that the arrangement of two bearings can ensure that the rotor assembly does not wobble after installation, reduce maintenance, and extend the service life of the motor.

[0012] Furthermore, the side of the accommodating chamber is provided with multiple air outlets.

[0013] The advantage of adopting the above technical solution is that the cooling fan rotates with the shaft, and the multiple air outlets deliver cool air, carrying away the heat inside the motor, ensuring the cooling effect, effectively reducing the temperature of the motor during operation, and extending its service life.

[0014] Furthermore, the integrated rotor also includes a magnet, and a balance ring is mounted on the upper side of the magnet.

[0015] The advantages of adopting the above technical solution are that the magnet is used to cooperate with the stator assembly to drive the shaft to rotate, and the setting of the balance ring balances the axial force of the shaft, effectively extending its service life.

[0016] Furthermore, a fan assembly is installed on the lower side of the housing assembly, including: a fan shroud, a moving impeller, and a fixed impeller. The moving impeller is located inside the fan shroud and connected to the rotating shaft. The fixed impeller is connected to the housing assembly, and the fan shroud is fixed to the housing assembly.

[0017] The advantage of adopting the above technical solution is that the fan assembly is set up to provide a blowing function, which can be applied to hair dryers and provides smooth airflow.

[0018] Furthermore, the stator assembly includes: a stator frame and an iron core, with coils wound on the iron core, a mounting base provided on the stator frame, and terminals inserted into the mounting base.

[0019] The advantage of adopting the above technical solution is that the mounting base is used to fix the terminals, and the terminals are used to fix and connect the two protruding ends of the coil. When the coil is energized, it forms a magnetic field and drives the rotating shaft to rotate.

[0020] Furthermore, the stator assembly is also provided with a circuit board and a top cover on its upper side. The circuit board is connected to the stator frame, the top cover presses against the circuit board, and is provided with through holes for connecting wires.

[0021] The advantage of adopting the above technical solution is that the top cover provides protection, improving safety and extending service life.

[0022] Furthermore, the cooling fan includes a main body and a plurality of blades arranged on the circumference of the main body, the blades being vertically arranged.

[0023] The advantage of adopting the above technical solution is that the vertically arranged blades blow air to the side, and the cold air directly carries away the heat inside the motor, which plays a very good role in heat dissipation.

[0024] Furthermore, a through hole is provided at the bottom of the shroud, and a sealing ring is provided on the side of the through hole.

[0025] The advantages of adopting the above technical solution are that the through hole is designed for air intake, and the sealing ring can prevent air leakage and effectively reduce noise.

[0026] Furthermore, the stator frame includes an upper frame and a lower frame, the upper frame being provided with a boss, and the boss being connected to the circuit board.

[0027] The advantages of adopting the above technical solution are that the upper and lower frames are used to fix the iron core, the boss is convenient to connect with the circuit board, and the upper and lower frames are convenient to install and maintain. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0029] Figure 1 This is a cross-sectional schematic diagram of the overall structure of the brushless suction motor with cooling structure of this utility model.

[0030] Figure 2 This is an exploded view of the brushless suction motor with a cooling structure of this utility model.

[0031] Figure 3 This is a schematic diagram of the shell assembly structure of this utility model.

[0032] Figure 4 This is a schematic diagram of the cooling fan structure of this utility model.

[0033] Figure 5 This is a schematic diagram of the upper skeleton structure of this utility model.

[0034] Figure 6 This is a schematic diagram of the terminal structure of this utility model.

[0035] The reference numerals used in the attached figures are as follows:

[0036] Housing assembly 1; receiving chamber 11; air outlet 111; rotor assembly 2; rotating shaft 21; bearing 22; spring 23; pressure ring 24; stator assembly 3; stator frame 31; upper frame 311; lower frame 312; boss 313; iron core 32; mounting base 33; fixing part 331; terminal 34; receiving groove 341; circuit board 35; upper cover 36; cooling fan 4; main body 41; blades 42; magnet 5; balance ring 51; fan cover 6; moving impeller 61; fixed impeller 62; sealing ring 63. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings.

[0038] like Figure 1-2As shown, this utility model discloses a brushless suction motor with a cooling structure, comprising:

[0039] The housing assembly 1 has an internal receiving chamber 11;

[0040] Rotor assembly 2, installed in housing 11, includes an integral rotor, the integral rotor including a rotating shaft 21, on which a plurality of bearings 22 are sleeved;

[0041] Stator assembly 3 is mounted on housing assembly 1, and the rotating shaft 21 passes through stator assembly 3;

[0042] The cooling assembly includes a cooling fan 4 mounted on the shaft 21, the cooling fan 4 being located between the bearings 22.

[0043] The advantages of adopting the above technical solution are that it improves cooling effect, extends service life, facilitates assembly, and reduces noise.

[0044] Furthermore, there are two bearings 22, arranged one above the other. The inner ring of the bearing 22 is interference-fitted with the shaft 21, and the outer side of the bearing 22 is glued to the receiving chamber 11. A spring 23 is arranged between the two bearings 22. The spring 23 applies preload to the bearing, improving axial and radial positioning accuracy and bearing rigidity, and preventing abnormal noise caused by vibration or resonance during operation. Pressure rings 24 are arranged on the upper and lower sides of the bearing 22. The cooling fan 4 is fixedly sleeved on the shaft 21, located inside the spring 23. Due to the gap in the spring 23, the air generated by the cooling fan 4 blows out through the gap in the spring 23, carrying away the heat inside the rotor. The arrangement of two bearings 22 can ensure that the rotor assembly 2 does not wobble after installation, reduce maintenance, and extend the service life of the motor.

[0045] Furthermore, the side of the containment chamber 11 is provided with multiple air outlets 111 (such as... Figure 3 As shown, the air outlets 111 are evenly arranged on the outside of the housing 11. The cooling fan 4 rotates with the shaft 21. The arrangement of multiple air outlets 111 directs the airflow to cool the entire motor from the inside, ensuring the cooling effect. At the same time, it carries the heat from the stator assembly 3 and the mover assembly, which will effectively reduce the temperature of the motor during operation and extend its service life.

[0046] In some implementations, the integrated rotor also includes a magnet 5, on the upper side of which a balance ring 51 is mounted. The balance ring 51 is interference-fitted with the shaft 21. The magnet 5 is fixed to the shaft 21 by applying adhesive, which drives the shaft 21 to rotate. The balance ring 51 balances the axial force of the shaft 21, effectively extending its service life.

[0047] In some implementations, a fan assembly is mounted on the lower side of the housing assembly 1, including: a fan shroud 6, a moving impeller 61, and a fixed impeller 62. The moving impeller 61 is located inside the fan shroud 6 and connected to the rotating shaft 21. The fixed impeller 62 is connected to the housing assembly 1 by screws. Multiple inclined blades are arranged around the fixed impeller 62, forming air guide channels between them for air guidance. The fan shroud 6 is fixed to the housing assembly 1. The moving impeller 61 has an air inlet at its bottom and multiple arc-shaped blades on its side. The fan shroud 6 has a through hole at its bottom, which communicates with the air inlet at the bottom of the moving impeller 61. The fan shroud 6 has a sealing groove at its bottom, and a sealing ring 63 is installed in the sealing groove. The moving impeller 61 has a downward-facing annular protrusion at its bottom, which contacts the sealing ring 63 to ensure good sealing performance, smooth airflow, reduced airflow disturbance, and reduced noise. This fan assembly provides a blowing function and can be applied to a hair dryer, ensuring smooth airflow.

[0048] In some embodiments, the stator assembly 3 includes: a stator frame 31 and an iron core 32, with coils wound on the iron core 32. A mounting base 33 is provided on the stator frame 31, and terminals 34 (e.g., ...) are inserted into the mounting base 33. Figure 6 As shown, the stator frame 31 is connected to the housing by long screws. There are multiple coils, each with a protruding end that extends into the mounting base 33. Terminals 34 are then inserted to connect the terminals 34 to the coil. The mounting base 33 has a fixing part 331 to fix the coil protruding end. Terminals 34 have receiving grooves 341 that cooperate with the fixing part 311 to fix the coil protruding end when inserted into the mounting base 33. The mounting base 33 is used to fix the terminals 34, and the terminals 34 are used to fix and connect the coil protruding end. When the coil is energized, it forms a magnetic field, driving the rotating shaft 21 to rotate.

[0049] Furthermore, the stator assembly 3 is also provided with a circuit board 35 and a top cover 36 on its upper side. The circuit board 35 is welded to the upper end of the terminal 34, and the top cover 36 presses the circuit board 35 and is provided with a through hole for the connection wire. The top cover 36 is provided to protect the circuit board and improve the safety and service life.

[0050] In some embodiments, the cooling fan 4 includes a main body 41 and a plurality of blades 42 disposed on the outer circumference of the main body 41 (e.g., Figure 4 As shown), the blades 42 are vertically arranged, and the cooling fan 4 has a connection port in the middle. It is connected by an interference fit. The vertically arranged blades 42 blow air to the side, and the cold air directly carries away the heat inside the motor, which plays a good role in heat dissipation.

[0051] In some embodiments, the stator frame 31 includes an upper frame 311 and a lower frame 312, and the upper frame 311 is provided with a boss 313 (e.g., Figure 5As shown, the limiting step on the boss 313 is used to fix the position of the circuit board 35. The top of the boss 313 is provided with a threaded hole. The upper cover is connected to the boss 313 by screws to press the circuit board 35.

[0052] The advantages of adopting the above technical solution are that the upper frame 311 and the lower frame 312 are used to fix the iron core 32, the boss 313 is convenient to connect with the upper cover, and the upper and lower frames 312 are convenient for installation and maintenance.

[0053] In the assembly process, firstly, the pressure ring 24 is pressed into the rotating shaft 21, a bearing 22 is installed into the rotating shaft 21, and two cooling fans 4 are pressed in. Then, the spring 23 is installed, and the upper bearing 22 and pressure ring 24 are pressed into the rotating shaft 21, while controlling the span. Finally, the magnet 5 is installed, the balance ring 51 is pressed in, and the outer side of the bearing 22 is glued to the housing accommodating chamber 11. Then, the stator assembly 3 is fixed to the housing with locking screws. The fan assembly follows the conventional double-bearing 22 brushless suction motor assembly method. The circuit board 35 is positioned by the boss 313 of the upper frame 311 in the stator assembly 3, and the terminals 34 are soldered to the pads of the circuit board 35. The upper cover 36 presses the circuit board 35 and is fixed to the upper frame 311 with locking screws. This application's brushless suction motor is equipped with cooling fans 4. The fans rotate with the rotating shaft 21, providing cooling and removing the heat generated by the motor. This also reduces the need for bracket positioning, resulting in better concentricity and higher precision. This extends the service life of the brushless suction motor. Reducing the individual balancing process for rotor assembly 2 improves assembly efficiency. Furthermore, fewer parts result in lower costs, fewer processes, smoother airflow, reduced noise, and superior performance.

[0054] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A brushless suction motor with a cooling structure, characterized in that, include: The housing assembly (1) has an internal receiving chamber (11); The rotor assembly (2) is installed in the housing (11) and includes an integral rotor, the integral rotor including a shaft (21) on which a plurality of bearings (22) are fitted. A stator assembly (3) is mounted on the housing assembly (1), and the rotating shaft (21) passes through the stator assembly (3); The cooling assembly includes a cooling fan (4) mounted on the shaft (21) and located between the bearings (22).

2. The brushless suction motor with a cooling structure according to claim 1, characterized in that, There are two bearings (22), and a spring (23) is provided between the two bearings (22). The cooling fan (4) is installed inside the spring (23), and pressure rings (24) are provided on the upper and lower sides of the bearings (22).

3. The brushless suction motor with a cooling structure according to claim 1, characterized in that, The side of the accommodating chamber (11) is provided with multiple air outlets (111).

4. The brushless suction motor with a cooling structure according to claim 1, characterized in that, The integrated rotor also includes a magnet (5), and a balance ring (51) is installed on the upper side of the magnet (5).

5. The brushless suction motor with a cooling structure according to claim 1, characterized in that, A fan assembly is installed on the lower side of the housing assembly (1), including: a fan cover (6), a moving impeller (61), and a fixed impeller (62). The moving impeller (61) is located inside the fan cover (6) and connected to the rotating shaft (21). The fixed impeller (62) is connected to the housing assembly (1). The fan cover (6) is fixed to the housing assembly (1).

6. The brushless suction motor with a cooling structure according to claim 1, characterized in that, The stator assembly (3) includes: a stator frame (31) and an iron core (32). A coil is wound on the iron core (32). A mounting base (33) is provided on the stator frame (31). A terminal (34) is inserted into the mounting base (33).

7. The brushless suction motor with a cooling structure according to claim 6, characterized in that, The stator assembly (3) is also provided with a circuit board (35) and a top cover (36) on its upper side. The circuit board (35) is connected to the stator frame (31). The top cover (36) presses the circuit board (35) together and is provided with a through hole for connecting wires.

8. The brushless suction motor with a cooling structure according to claim 2, characterized in that, The cooling fan (4) includes a main body (41) and a plurality of blades (42) arranged around the circumference of the main body (41), the blades (42) being arranged vertically.

9. The brushless suction motor with a cooling structure according to claim 5, characterized in that, The bottom of the hood (6) is provided with a through hole, and a sealing ring (63) is provided on the side of the through hole.

10. The brushless suction motor with a cooling structure according to claim 6, characterized in that, The stator frame (31) includes an upper frame (311) and a lower frame (312). The upper frame (311) is provided with a boss (313), which is connected to the circuit board (35).

Images