Motor structure for magnetic shoe improved assembly type fitness equipment

Abstract

The utility model relates to the technical field of motors, and particularly discloses a magnetic shoe improved motor structure for assembly type fitness equipment, which comprises a cylinder and a magnetic shoe assembly accommodated in the cylinder. The magnetic shoe assembly comprises a frame body and a plurality of magnetic shoe parts arranged in the frame body, the plurality of magnetic shoe parts are arranged around the central axis of the cylinder, the frame body is provided with a plurality of accommodating grooves for accommodating the plurality of magnetic shoe parts, and the magnetic shoe parts are in one-to-one correspondence with the accommodating grooves. A plurality of accommodating grooves for accommodating a plurality of magnetic shoe parts are arranged in the frame body, so that efficient assembly and accurate positioning are realized, the design not only simplifies the assembly process and improves the production efficiency, but also ensures the uniformity of magnetic field distribution and optimizes the overall performance of the motor, and the front cover, the magnetic shoe assembly and the rear cover are rotationally connected with the shaft body parts after being fixed through the fasteners, so that the assembly efficiency of the motor is improved. And an efficient and stable motor system is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular discloses a motor structure for magnetic tile improved assembled fitness equipment. Background Art

[0002] Most of the existing outboard motors have designs that attach magnetic tiles to the inside of the steel pipe (rotor). This design has unique advantages, such as improving torque density, power density, and stability under certain working conditions. However, this design also has some shortcomings. Precisely attaching the magnetic tiles to the inside of the steel pipe requires high process requirements, including precise magnetic tile positioning, fixation stability, and durability, which increases the complexity and difficulty of manufacturing. In addition, the fixing method between the magnetic tiles and the steel pipe may be affected by various factors such as temperature and vibration, and there is a risk of loosening or falling off. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a motor structure for assembled fitness equipment with improved magnetic tiles.

[0004] To achieve the above-mentioned purpose, the utility model provides a motor structure for improving assembled fitness equipment with a magnetic tile, comprising a cylinder and a magnetic tile assembly accommodated in the cylinder; the magnetic tile assembly comprises a frame and a plurality of magnetic tile parts arranged in the frame, the plurality of magnetic tile parts are arranged around the central axis of the cylinder, the frame is provided with a plurality of accommodating grooves for accommodating the plurality of magnetic tiles, and the magnetic tiles correspond to the accommodating grooves one by one.

[0005] By designing the magnetic tiles to correspond exactly with the housing slots, the assembly process is greatly simplified and efficiency is improved. Workers simply place the tiles directly into their corresponding slots, eliminating the need for complex adjustments and positioning. Precise tile arrangement and slot design ensure uniform magnetic field distribution and efficient utilization, improving overall motor performance. This design also helps reduce vibration and noise issues caused by improper tile installation.

[0006] The motor structure also includes a shaft part that cooperates with the cylinder, a coil unit arranged on the shaft part and cooperating with the magnetic tile assembly, and a front cover and a rear cover rotatably arranged on the shaft part; the cylinder is clamped between the front cover and the rear cover, the magnetic tile assembly, the front cover, the rear cover, and the cylinder are fixed together to form an outer rotor, and the magnetic tile assembly is rotatably set on the shaft part via the front cover and the rear cover.

[0007] When current passes through the coil unit, a varying magnetic field is generated. This magnetic field interacts with the magnetic field of the permanent magnets in the magnetic tile assembly, generating a rotational force. Because the magnetic tile assembly is fixed between the front and rear covers and forms the outer rotor together with the cylinder, the interaction of the magnetic fields causes the outer rotor to rotate around the shaft. This rotational motion is transmitted to the output portion of the motor via the shaft, thereby driving the corresponding components of the fitness equipment. The cylinder, serving as the motor's primary support structure, closely mates with the front and rear covers and the magnetic tile assembly to form a stable whole. This design enhances the motor's structural strength and improves its stability and reliability during high-speed rotation and long-term operation.

[0008] The frame is made of plastic, and the magnetic tiles are integrally molded into the frame through injection molding. This one-piece molding process significantly simplifies the manufacturing process of the magnetic tile assembly. Traditionally, the magnetic tiles may have to be manufactured separately and then assembled with the frame. Injection molding technology, however, allows the magnetic tiles to be embedded into the plastic frame during its formation, reducing the number of assembly steps and potential assembly errors. The plastic material fills every nook and cranny of the frame during the injection molding process, forming a sturdy structure. This structural strength is crucial for resisting vibration and shock, helping to protect the magnetic tiles from damage and extending the life of the motor.

[0009] Connection holes are located between adjacent magnetic tiles on the frame, accommodating external screws that connect the front and rear covers. These screws securely connect the front and rear covers to the magnetic tile assembly on the frame, forming a stable, integrated structure. This connection not only enhances the motor's stability during rotation but also helps resist external shock and vibration, ensuring long-term operational reliability. When maintenance or component replacement is required, the external screws allow for easy removal and reinstallation of the front and rear covers.

[0010] The frame includes a circular portion with multiple sets of vertical mounting bars evenly distributed around the circumference of the circular portion. A slot for accommodating a magnetic tile is formed between two adjacent sets of vertical mounting bars, and the connection holes are provided in the vertical mounting bars. Both the front and rear covers are provided with through holes, and the external screws are sequentially passed through the through holes in the front cover, the connection holes in the frame's vertical mounting bars, and the through holes in the rear cover.

[0011] External screws connect the front cover, magnetic tile assembly, and rear cover into a single unit, significantly enhancing the motor's structural strength. This fastening method is more reliable than traditional snap-on or adhesive fastening methods and can withstand greater mechanical stress and vibration. The external screws are relatively simple and quick to install and remove, requiring no special tools or complex procedures, making motor assembly and maintenance much easier.

[0012] The bottom surfaces of the cylinder are removably attached to the front and rear covers via fasteners. The front and rear covers jointly clamp the cylinder, which is rotatably mounted on the shaft member via the front and rear covers. The clamping action of the front and rear covers on the cylinder enhances the overall stability of the motor structure. This clamping method prevents the cylinder from shifting or shaking during rotation, ensuring smooth operation of the motor. The bottom surfaces of the cylinder are removably attached to the front and rear covers via fasteners. When the motor is running, the front and rear covers rotate on the shaft member via bearings, driving the cylinder fixed to the front and rear covers to rotate together.

[0013] The cylinder has multiple sets of threaded holes on the bottom surfaces of both sides, and circular holes on the front and rear covers. External screws penetrate the circular holes on the front and rear covers to secure the front and rear covers to the threaded holes on the bottom surfaces of the cylinder. This is the first connection method between the cylinder and the front and rear covers. Threaded holes are designed on the bottom surfaces of the cylinder to connect the front and rear covers. The threaded holes allow for a secure connection using fasteners such as screws, while facilitating removal and reinstallation. This design allows for easy removal and reinstallation of the front and rear covers, facilitating cleaning, maintenance, and component replacement within the cylinder.

[0014] There are multiple sets of limiting protrusions on the bottom surfaces of both sides of the cylinder, and grooves are provided on the front cover and the rear cover. The front cover and the rear cover are riveted to the cylinder via the limiting protrusions and grooves. The above is the second connection method between the cylinder and the front cover and the rear cover. The limiting protrusions are provided on the bottom surfaces of both sides of the cylinder. These protrusions usually have specific shapes and sizes to match the grooves on the front cover and the rear cover. The grooves on the front cover and the rear cover are designed to receive the limiting protrusions on the cylinder. When the two are matched, the relative position of the front cover and the rear cover on the cylinder can be limited to prevent them from rotating or sliding. The combination of the limiting protrusions and the grooves and the application of riveting technology together ensure a stable connection between the front cover and the rear cover and the cylinder, thereby improving the stability of the entire structure.

[0015] The annular portion is provided in two groups, one at each end of the vertical mounting bar. The side of the annular portion facing away from the vertical mounting bar protrudes to form a boss, which is provided with an opening that connects to the connection hole in the vertical mounting bar. The bosses protrude from the surface of the annular portion. These bosses not only increase the contact area between the annular portion and the vertical mounting bar but also provide additional connection points. The bosses are provided with openings that connect to the connection holes in the vertical mounting bar, forming a through-hole. This design allows bolts, pins, or other fasteners to be inserted through the openings in the bosses and the connection holes in the vertical mounting bar, securely connecting the annular portion to the vertical mounting bar or other components, thereby enhancing the stability of the structure.

[0016] The boss protrudes 10-20mm above the surface of the ring. This design increases the contact area between the ring and the vertical mounting bar, thereby improving the structural stability. When subjected to external forces, the boss effectively disperses and transfers the load, reducing stress concentration and preventing deformation or damage to the structure.

[0017] Both the front and rear covers are equipped with ventilation holes, with blades formed between adjacent ventilation holes. These holes create heat dissipation channels when the motor rotates. When the motor rotates, the front cover's ventilation holes bring in outside air, while the rear cover's ventilation holes remove internal hot air, creating a continuous airflow cycle. When the motor rotates, the front cover's ventilation holes draw relatively cool air in, while the rear cover's ventilation holes expel the hot air generated inside. This creates a continuous airflow cycle that continuously removes heat from the motor, keeping it operating within a suitable temperature range.

[0018] Beneficial effects of the present invention: The magnetic tile of the present invention improves the motor structure for assembled fitness equipment. The core principle is to form an efficient and stable motor system by optimizing the design of the magnetic tile assembly, especially adopting a structure in which the magnetic tile and the plastic frame are integrally molded, and fixing the front cover, the magnetic tile assembly, and the rear cover with fasteners and then rotatably connecting them with the shaft. The precise installation and fixation of the magnetic tile improves the efficiency of the magnetic field energy utilization, while the use of the plastic frame simplifies the assembly process and enhances the overall strength of the magnetic tile assembly. The integral molding of the magnetic tile and the plastic frame simplifies the assembly process, and no separate magnetic tile installation step is required. At the same time, the design of the fasteners makes it more convenient to replace the magnetic tile or perform other maintenance at a later time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the magnetic tile assembly, front cover, rear cover and shaft member of the present invention;

[0021] Figure 3 It is a cross-sectional view of the magnetic tile assembly of the present invention;

[0022] Figure 4 This is a structural diagram of the first embodiment of the front cover, rear cover and cylinder of the utility model;

[0023] Figure 5 This is a structural schematic diagram of a second embodiment of the front cover, rear cover and cylinder of the present invention;

[0024] Reference numerals include:

[0025] 1. Cylinder; 2. Magnetic tile assembly; 3. Shaft; 4. Front cover; 5. Rear cover; 6. Frame; 7. Magnetic tile; 8. Connecting hole; 9. Circular ring; 11. Vertical mounting strip; 12. Through hole; 13. Bottom; 14. Threaded hole; 15. Circular hole; 16. Limiting point; 17. Groove; 18. Boss; 19. Opening; 21. Ventilation hole; 22. Blade. DETAILED DESCRIPTION

[0026] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0027] See also Figures 1 to 5 As shown, the utility model is a motor structure for magnetic tile improved assembled fitness equipment, including a cylinder 1 and a magnetic tile assembly 2 accommodated in the cylinder 1; the magnetic tile assembly 2 includes a frame 6 and a plurality of magnetic tile parts 7 arranged in the frame 6, the plurality of magnetic tile parts 7 are arranged around the central axis of the cylinder 1, the frame 6 is provided with a plurality of accommodating grooves for accommodating the plurality of magnetic tile parts 7, and the magnetic tile parts 7 correspond to the accommodating grooves one by one.

[0028] By designing the magnetic tiles 7 to correspond exactly with the slots in the frame 6, the assembly process is greatly simplified and efficiency is improved. Workers simply place the tiles 7 directly into their corresponding slots to complete installation, eliminating the need for complex adjustments and positioning. Precise arrangement of the tiles 7 and slot design ensures uniform distribution and efficient utilization of the magnetic field, thereby improving the overall performance of the motor. This design also helps reduce vibration and noise issues caused by improper installation of the tiles 7.

[0029] The motor structure also includes a shaft part 3 that cooperates with the cylinder 1, a coil unit arranged on the shaft part 3 and cooperating with the magnetic tile assembly 2, and a front cover 4 and a rear cover 5 that are rotatably arranged on the shaft part 3; the cylinder 1 is clamped between the front cover 4 and the rear cover 5, and the magnetic tile assembly 2, the front cover 4, the rear cover 5, and the cylinder 1 are fixed together to form an outer rotor, and the magnetic tile assembly 2 is rotatably set on the shaft part 3 via the front cover 4 and the rear cover 5.

[0030] When current passes through the coil unit, a changing magnetic field is generated. This magnetic field interacts with the magnetic field of the permanent magnet in the magnetic tile assembly 2, generating a rotational force. Since the magnetic tile assembly 2 is fixed between the front cover 4 and the rear cover 5, and together with the cylinder 1 forms an outer rotor, when the magnetic fields interact, the outer rotor rotates around the shaft member 3. This rotational motion is transmitted to the output part of the motor through the shaft member 3, thereby driving the corresponding parts of the fitness equipment to move. The cylinder 1 serves as the main supporting structure of the motor, and it fits tightly with the front cover 4, the rear cover 5 and the magnetic tile assembly 2 to form a stable whole. This design enhances the structural strength of the motor and improves the stability and reliability of the motor during high-speed rotation and long-term operation.

[0031] The frame 6 is made of plastic, and the magnetic tile 7 is integrally formed into the frame 6 by injection molding the plastic into a mold to form the magnetic tile assembly 2. The one-piece molding production process greatly simplifies the manufacturing process of the magnetic tile assembly 2. Traditionally, the magnetic tile 7 may need to be manufactured separately and then assembled with the frame 6, but injection molding technology allows the magnetic tile 7 to be embedded in it at the same time as the plastic frame 6 is formed, reducing the number of assembly steps and potential assembly errors. During the injection molding process, the plastic material can fill the corners and gaps of the frame 6 to form a sturdy structure. This structural strength is crucial for resisting vibration and impact, helping to protect the magnetic tile 7 from damage and extending the service life of the motor.

[0032] Connecting holes 8 are located between adjacent magnetic tiles 7 on the frame 6. These holes accommodate external screws that connect the front and rear covers 4 and 5. These screws securely connect the front and rear covers 4 and 5 to the magnetic tile assembly 2 on the frame 6, forming a stable, integrated structure. This connection not only enhances the stability of the motor during rotation but also helps resist external shock and vibration, ensuring long-term operational reliability. When maintenance or component replacement is required, the external screws allow for easy removal and reinstallation of the front and rear covers 4 and 5.

[0033] The frame 6 includes a circular portion 9 and multiple groups of vertical mounting bars 11 evenly distributed around the circumference of the circular portion 9. A slot for accommodating a magnetic tile 7 is formed between two adjacent groups of vertical mounting bars 11. The connection holes 8 are disposed within the vertical mounting bars 11. Both the front cover 4 and the rear cover 5 are provided with through holes 12. External screws pass sequentially through the through holes 12 of the front cover 4, the connection holes 8 within the vertical mounting bars 11 of the frame 6, and the through holes 12 of the rear cover 5.

[0034] External screws connect the front cover 4, magnetic tile assembly 2, and rear cover 5 into a single unit, significantly enhancing the motor's structural strength. This fastening method is more reliable than traditional snap-on or adhesive fastening methods and can withstand greater mechanical stress and vibration. The external screws are relatively simple and quick to install and remove, requiring no special tools or complex procedures, making motor assembly and maintenance much easier.

[0035] The bottom surfaces 13 on both sides of the cylinder 1 are detachably mounted to the front cover 4 and the rear cover 5 via fasteners. The front cover 4 and the rear cover 5 jointly clamp the cylinder 1, and the cylinder 1 is rotatably mounted on the shaft member 3 via the front cover 4 and the rear cover 5. The clamping action of the front cover 4 and the rear cover 5 on the cylinder 1 enhances the overall stability of the motor structure. This clamping method makes it difficult for the cylinder 1 to deviate or shake during rotation, thereby ensuring the smooth operation of the motor. The bottom surfaces 13 on both sides of the cylinder 1 are detachably mounted to the front cover 4 and the rear cover 5 via fasteners. When the motor is running, the front cover 4 and the rear cover 5 are rotatably mounted on the shaft member 3 via the bearing member, while driving the cylinder 1 fixedly mounted on the front cover 4 and the rear cover 5 to rotate together.

[0036] In the first set of embodiments, multiple sets of threaded holes 14 are provided on the bottom surfaces 13 on both sides of the cylinder 1. Round holes 15 are provided on the front cover 4 and the rear cover 5. External screws penetrate the round holes 15 on the front cover 4 and the round holes 15 on the rear cover 5 to secure the front cover 4 and the rear cover 5 to the threaded holes 14 on the bottom surfaces 13 on both sides of the cylinder 1. This is the first method of connecting the cylinder 1 to the front cover 4 and the rear cover 5. The threaded holes 14 are designed on the bottom surfaces 13 on both sides of the cylinder 1 for connection with the front cover 4 and the rear cover 5. The threaded holes 14 allow for a secure connection using fasteners such as screws, while facilitating removal and reinstallation. This design allows for easy removal and reinstallation of the front cover 4 and the rear cover 5, facilitating cleaning, maintenance, and component replacement within the cylinder 1.

[0037] In the second embodiment, the cylinder 1 is connected to the front and rear covers 4 and 5 by riveting. Multiple sets of retaining bumps 16 are provided on the bottom surface 13 of the cylinder 1, and grooves 17 are provided on the front and rear covers 4 and 5. The front and rear covers 4 and 5 are riveted to the cylinder 1 via the retaining bumps 16 and grooves 17. This is the second method of connecting the cylinder 1 to the front and rear covers 4 and 5. The retaining bumps 16 are provided on the bottom surface 13 of the cylinder 1. These bumps typically have a specific shape and size to mate with the grooves 17 on the front and rear covers 4 and 5. The grooves 17 on the front and rear covers 4 and 5 are designed to receive the retaining bumps on the cylinder 1. When engaged, they restrict the relative position of the front and rear covers 4 and 5 on the cylinder 1, preventing them from rotating or sliding. The combination of the retaining bumps 16 and grooves 17, along with the application of riveting technology, ensures a secure connection between the front and rear covers 4 and 5 and the cylinder 1, enhancing the overall structural stability.

[0038] The annular portion 9 is provided in two groups, one at each end of the vertical mounting bar 11. The side of the annular portion 9 facing away from the vertical mounting bar 11 protrudes to form a boss 18, which is provided with an opening 19. The opening 19 on the boss 18 communicates with the connection hole 8 in the vertical mounting bar 11. The bosses 18 protrude from the surface of the annular portion 9. These bosses 18 not only increase the contact area between the annular portion 9 and the vertical mounting bar 11 but also provide additional connection points. The openings 19 on the boss 18 communicate with the connection hole 8 in the vertical mounting bar 11, forming a continuous passage. This design allows bolts, pins, or other fasteners to be inserted through the openings 19 on the boss 18 and the connection hole 8 in the vertical mounting bar 11, securely connecting the annular portion 9 to the vertical mounting bar 11 or other components, thereby enhancing the stability of the structure.

[0039] Boss 18 protrudes 10-20 mm from the surface of annular portion 9. This design increases the contact area between annular portion 9 and vertical mounting bar 11, thereby enhancing structural stability. When subjected to external forces, boss 18 effectively disperses and transfers loads, reducing stress concentration and preventing deformation or damage.

[0040] Both the front cover 4 and the rear cover 5 are provided with ventilation holes 21, with blades 22 formed between adjacent ventilation holes 21. The ventilation holes 21 are used to form a heat dissipation channel when the motor rotates. When the motor rotates, the ventilation holes 21 on the front cover 4 bring in external air, while the ventilation holes 21 on the rear cover 5 remove the internal hot air, achieving an air circulation. When the motor rotates, the ventilation holes 21 on the front cover 4 bring relatively cool air from the outside into the motor, while the ventilation holes 21 on the rear cover 5 are responsible for exhausting the hot air generated inside the motor. In this way, a continuous air circulation is formed, which continuously removes heat from the interior of the motor and keeps the motor operating within a suitable temperature range.

[0041] The rest of this embodiment is the same as that of the first embodiment. The features not explained in this embodiment are all based on the explanations of the first embodiment and will not be described in detail here.

[0042] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A motor structure for an improved assembled fitness equipment with magnetic tiles, characterized by: The invention comprises a cylinder (1) and a magnetic tile assembly (2) accommodated in the cylinder (1); the magnetic tile assembly (2) comprises a frame (6) and a plurality of magnetic tile members (7) arranged in the frame (6); the plurality of magnetic tile members (7) are arranged around the central axis of the cylinder (1); the frame (6) is provided with a plurality of receiving grooves for receiving the plurality of magnetic tile members (7); the magnetic tile members (7) correspond to the receiving grooves one by one.

2. The motor structure for an assembled fitness equipment improved with magnetic tiles according to claim 1, characterized in that: The motor structure further comprises a shaft member (3) matched with the cylinder (1), a coil unit arranged on the shaft member (3) and matched with the magnetic tile assembly (2), and a front cover (4) and a rear cover (5) rotatably arranged on the shaft member (3); the cylinder (1) is clamped between the front cover (4) and the rear cover (5); the magnetic tile assembly (2), the front cover (4), the rear cover (5) and the cylinder (1) are fixed together to form an outer rotor; the magnetic tile assembly (2) is rotatably arranged on the shaft member (3) via the front cover (4) and the rear cover (5).

3. The motor structure for magnetic tile-improved assembled fitness equipment according to claim 1, characterized in that: The frame (6) is made of plastic, and the magnetic tile component (7) is integrally formed into the magnetic tile assembly (2) by injecting the plastic into the frame (6) through a mold.

4. The motor structure for magnetic tile-improved assembled fitness equipment according to claim 1, characterized in that: A connecting hole (8) is provided between two adjacent magnetic tiles (7) on the frame (6), and the connecting hole (8) accommodates an external screw connected to the front cover (4) and the rear cover (5).

5. The motor structure for magnetic tile improved assembled fitness equipment according to claim 4, characterized in that: The frame (6) includes a circular ring portion (9), and a plurality of groups of vertical mounting bars (11) uniformly distributed on the circular ring portion (9). A receiving groove for receiving a magnetic tile (7) is formed between two adjacent groups of vertical mounting bars (11), and the connecting hole (8) is arranged in the vertical mounting bar (11).

6. The motor structure for magnetic tile improved assembled fitness equipment according to claim 4, characterized in that: The front cover (4) and the rear cover (5) are both provided with through holes (12), and the external screw passes through the through hole (12) of the front cover (4), the connecting hole (8) of the frame (6), and the through hole (12) of the rear cover (5) in sequence.

7. The motor structure for magnetic tile improved assembled fitness equipment according to claim 2, characterized in that: A plurality of threaded holes (14) are provided on the bottom surfaces (13) on both sides of the cylinder (1), and circular holes (15) are provided on the front cover (4) and the rear cover (5). External screws penetrate the circular holes (15) on the front cover (4) and the circular holes (15) on the rear cover (5) to fix the front cover (4) and the rear cover (5) to the threaded holes (14) on the bottom surfaces (13) on both sides of the cylinder (1).

8. The motor structure for magnetic tile improved assembled fitness equipment according to claim 2, characterized in that: A plurality of groups of limiting convex points (16) are provided on the bottom surfaces (13) on both sides of the cylinder (1), and grooves (17) are provided on the front cover (4) and the rear cover (5). The front cover (4) and the rear cover (5) are riveted to the cylinder (1) via the limiting convex points (16) and the grooves (17).

9. The motor structure for magnetic tile improved assembled fitness equipment according to claim 5, characterized in that: The annular portion (9) is provided with two groups, and the two groups of annular portions (9) are respectively located at both ends of the vertical mounting bar (11). One end of the annular portion (9) away from the vertical mounting bar (11) protrudes to form a boss (18), and an opening (19) is provided on the boss (18). The opening (19) on the boss (18) is connected to the connecting hole (8) in the vertical mounting bar (11).

10. The motor structure for magnetic tile improved assembled fitness equipment according to claim 2, characterized in that: The front cover (4) and the rear cover (5) are both provided with a plurality of ventilation holes (21), and blades (22) are formed between two adjacent ventilation holes (21). The ventilation holes (21) are used to form heat dissipation channels when the motor rotates. When the motor rotates, the ventilation holes (21) of the front cover (4) bring in external air, and the ventilation holes (21) of the rear cover (5) bring out internal hot air to achieve air circulation.

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