External rotor motor with dustproof function

Abstract

The utility model relates to the field of rotor motors, and discloses an external rotor motor with a dustproof function, which comprises a shell, a plurality of protection rings are arranged in the shell, a stator is fixedly arranged in the shell, a rotor body is rotatably arranged in the stator, a sleeve is fixedly inserted in the rotor body, and the protection rings are arranged in the sleeve. A rotating shaft is rotatably arranged in the sleeve, a first bearing is fixedly inserted into the rotating shaft, a second bearing is fixedly inserted into the rotating shaft, a clamping groove is formed in the inner wall face of the sleeve, a closed groove is formed in the inner bottom face of the clamping groove, and a fixing groove is formed in the surface of the rotating shaft. And a connecting groove is formed in the inner bottom surface of the fixing groove. According to the utility model, the sealing groove and the connecting groove are respectively formed in the clamping groove and the fixing groove, so that the clamping groove and the fixing groove form a barb type, a damping shape of air and dust is formed, the dust is more difficult to enter, and the safety of the first bearing and the second bearing during working is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor motors, and specifically relates to an outer rotor motor with a dust-proof function. Background Technique

[0002] An outer rotor motor is a motor with a special structure. Its stator is located inside, and the rotor is wrapped on the outer layer. This layout enables the outer rotor motor to have a larger rotor diameter under the same volume, thereby generating a larger torque at low speeds. Since the rotor diameter increases, the moment of inertia also increases, which is beneficial to the stable speed operation of the motor. At the same time, this structure also saves space, making the motor design more compact and beautiful, and suitable for installation in components such as impellers.

[0003] According to the Chinese patent with the publication number: CN216904436U, an outer rotor motor includes: providing an outer rotor motor, including a stator and an outer rotor rotatably connected to the stator, and further including a first bearing provided on the stator. The outer rotor includes a rotating shaft, a housing, a wire snap ring, and a gasket. The housing is provided outside the stator. The first end of the rotating shaft is fitted with the first bearing. An axial positioning portion is provided on the rotating shaft. The axial positioning portion is located on one axial side of the first bearing and is fitted with the inner ring of the first bearing. The wire snap ring and the gasket are located on the other axial side of the first rotating shaft. The gasket is fitted with the inner ring of the first bearing. A groove is provided on the rotating shaft. The wire snap ring is fitted into the groove and sleeved on the rotating shaft. The gasket is located between the wire snap ring and the first bearing. The wire snap ring presses the gasket against the inner ring of the first bearing to axially position the rotating shaft.

[0004] In the above solution, through the cooperation of the wire snap ring, the gasket, and the axial positioning portion, the axial positioning of the rotating shaft is achieved. However, it still has the following disadvantages: the bearing on the rotating shaft is directly exposed to the external environment, and dust will enter the interior of the bearing, which may cause the bearing to be stuck due to dust, reducing the safety of the bearing during operation. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an outer rotor motor with a dust-proof function to solve the problem that the bearing on the rotating shaft is directly exposed to the external environment, dust will enter the interior of the bearing, which may cause the bearing to be stuck due to dust, reducing the safety of the bearing during operation.

[0006] To achieve the above-mentioned utility model purpose, the present utility model adopts the following technical solutions: An outer rotor motor with a dust-proof function, including a housing, wherein a plurality of protective rings are arranged inside the housing, a stator is fixedly arranged inside the housing, the stator is fixed to the inner wall surface of the protective ring, a rotor body is rotatably arranged inside the stator, a sleeve is fixedly inserted inside the rotor body, a rotating shaft is rotatably arranged inside the sleeve, a first bearing is fixedly inserted on the rotating shaft, a second bearing is fixedly inserted on the rotating shaft, a clamping groove is formed on the inner wall surface of the sleeve, a closed groove is formed on the inner bottom surface of the clamping groove, a fixing groove is formed on the surface of the rotating shaft, a connecting groove is formed on the inner bottom surface of the fixing groove, the inner wall surface of the inner ring of the first bearing is fixedly inserted into the fixing groove, the first bearing is clamped on one side inside the fixing groove, and the second bearing is clamped on one side inside the clamping groove and the closed groove.

[0007] Preferably, a exhaust fan is rotatably arranged inside the housing, a fitting groove is formed on one side of the exhaust fan, a through hole is formed on one side inside the fitting groove, the through hole is rotatably inserted with the rotating shaft, and a nut is threadedly connected to the rotating shaft.

[0008] Preferably, a switch is arranged inside the housing, a fixing hole is formed on the surface of the housing, and the switch is fixedly inserted into the fixing hole.

[0009] Preferably, a storage groove is formed on the inner wall surface of the sleeve, and a blocking arc plate is slidably arranged inside the storage groove.

[0010] Preferably, a fitting plate is arranged inside the fitting groove, and a sticking plate is arranged on the other side of the housing.

[0011] Preferably, an indication mark is arranged on the surface of the housing.

[0012] Compared with the prior art, an outer rotor motor with a dust-proof function adopting the above technical solutions has the following beneficial effects:

[0013] First, during the rotation of the rotating shaft, the inner rings of the first bearing and the second bearing will be driven to rotate synchronously. During the rotation of the inner rings, since the first bearing and the second bearing are respectively clamped with the fixing groove, the connecting groove, the clamping groove and the closed groove, and since the clamping groove and the fixing groove are both in a stepped shape, using the centrifugal force during rotation to block dust particles from entering. In addition, a closed groove and a connecting groove are respectively formed in the clamping groove and the fixing groove, so a barb-like structure is formed between them, forming a damping shape for air and dust, making it more difficult for dust to enter, and increasing the safety of the first bearing and the second bearing during operation;

[0014] 2. According to the instructions of the sign, the staff can find the switch and use it to control the opening and closing of the motor. When the shaft rotates, the nut will increase the stability of the shaft rotating inside the shell. At the same time, since the bonding plate and the adhesive plate are respectively located at both ends of the shaft, and the bonding plate and the adhesive plate are sealed with high heat-resistant materials, they can prevent the return of the city and allow the shaft to rotate normally, thus extending the service life of the motor;

[0015] 3. The blocking arc plate can slide in the storage groove. Before the staff installs the rotating shaft equipped with the second bearing into the sleeve, the staff will first push the two ends of the blocking arc plate away from each other, so as to expand the diameter of the blocking arc plate and facilitate the staff to install the rotating shaft. After the rotating shaft is installed, the staff will remove the force applied to the blocking arc plate, so that the diameter of the blocking arc plate returns to its original state to prevent the rotating shaft from falling from the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of an embodiment.

[0017] Figure 2 It is an exploded perspective schematic diagram of an embodiment.

[0018] Figure 3 It is a schematic diagram of the explosion of the protective ring and the sleeve in the embodiment.

[0019] Figure 4 It is a schematic diagram of the explosion of the rotating shaft and the blocking arc plate in the embodiment.

[0020] In the figure: 1. outer shell; 2. protective ring; 3. rotating shaft; 4. stator; 5. rotor body; 6. sleeve; 7. first bearing; 8. second bearing; 9. snap-in groove; 10. closing groove; 11. fixing groove; 12. connecting groove; 13. exhaust fan; 14. fitting groove; 15. through hole; 16. switch; 17. fixing hole; 18. indicator mark; 19. storage groove; 20. arc blocking plate; 21. fitting plate; 22. adhesive plate; 23. nut. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figures 1 - 4As shown, an outer rotor motor with a dustproof function comprises a shell 1, a plurality of protective rings 2 are arranged inside the shell 1, a stator 4 is fixedly arranged inside the shell 1, the stator 4 is fixed to the inner wall of the protective ring 2, a rotor body 5 is rotatably arranged inside the stator 4, a sleeve 6 is fixedly inserted inside the rotor body 5, a rotating shaft 3 is rotatably arranged inside the sleeve 6, a first bearing 7 is fixedly inserted on the rotating shaft 3, a second bearing 8 is fixedly inserted on the rotating shaft 3, a clamping groove 9 is provided on the inner wall of the sleeve 6, a closed groove 10 is provided on the inner bottom surface of the clamping groove 9, a fixing groove 11 is provided on the surface of the rotating shaft 3, a connecting groove 12 is provided on the inner bottom surface of the fixing groove 11, the inner wall surface of the inner ring of the first bearing 7 is fixedly inserted with the fixing groove 11, the first bearing 7 is clamped with one side of the inner part of the fixing groove 11, and the second bearing 8 is clamped with the clamping groove 9 and one side of the inner part of the closed groove 10.

[0023] During use, the rotating shaft 3 will drive the inner rings of the first bearing 7 and the second bearing 8 to rotate synchronously during the rotation process. During the rotation process, the first bearing 7 and the second bearing 8 are respectively clamped with the fixed groove 11, the connecting groove 12, the clamping groove 9 and the closed groove 10. Since the clamping groove 9 and the fixed groove 11 are both step-shaped, the centrifugal force during rotation is used to prevent dust particles from entering. In addition, the closed groove 10 and the connecting groove 12 are respectively provided in the clamping groove 9 and the fixed groove 11, so that a hook-like shape is formed between each other, forming a damping shape for air and dust, and dust is more difficult to enter, which increases the safety of the first bearing 7 and the second bearing 8 during operation. The first bearing 7 is clamped with the inner side of the fixed groove 11, and the second bearing 8 is clamped with the inner side of the clamping groove 9 and the closed groove 10.

[0024] like Figures 2 - 4 As shown, an exhaust fan 13 is rotatably provided inside the shell 1, a fitting groove 14 is provided on one side of the exhaust fan 13, a through hole 15 is provided on one side inside the fitting groove 14, the through hole 15 is rotatably inserted with the rotating shaft 3, a nut 23 is threadedly connected on the rotating shaft 3, a switch 16 is provided inside the shell 1, a fixing hole 17 is provided on the surface of the shell 1, the switch 16 is fixedly inserted with the fixing hole 17, a fitting plate 21 is provided inside the fitting groove 14, an adhesive plate 22 is provided on the other side of the shell 1, and an indicator mark 18 is provided on the surface of the shell 1.

[0025] During use, according to the instructions of the indicator mark 18, the staff can find the switch 16 and use the switch 16 to control the opening and closing of the motor. When the shaft 3 rotates, the nut 23 will increase the stability of the rotation of the shaft 3 inside the shell 1. At the same time, since the bonding plate 21 and the adhesive plate 22 are respectively located at the two ends of the shaft 3, and since the bonding plate 21 and the adhesive plate 22 are sealed with high heat-resistant materials, they can prevent the entry of the city and allow the shaft 3 to rotate normally, thereby extending the service life of the motor.

[0026] likeFigure 3 and Figure 4 As shown in Figure 4 , a storage groove 19 is formed in the inner wall surface of the sleeve 6, and a blocking arc plate 20 is slidably arranged inside the storage groove 19.

[0027] In use, the blocking arc plate 20 can slide in the storage groove 19. Before the staff installs the rotating shaft 3 equipped with the second bearing 8 into the sleeve 6, the staff will first push the two ends of the blocking arc plate 20 away from each other, so as to expand the diameter of the blocking arc plate 20, facilitating the installation of the rotating shaft 3 by the staff. After the installation of the rotating shaft 3 is completed, the staff will remove the acting force applied to the blocking arc plate 20, so that the diameter of the blocking arc plate 20 returns to its original state, preventing the rotating shaft 3 from falling out of the sleeve 6.

[0028] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An outer rotor motor with dustproof function, comprising a housing (1), characterized in that: A plurality of protective rings (2) are arranged inside the housing (1); a stator (4) is fixedly arranged inside the housing (1); the stator (4) is fixed to the inner wall surface of the protective ring (2); a rotor body (5) is rotatably arranged inside the stator (4); a sleeve (6) is fixedly inserted inside the rotor body (5); a rotating shaft (3) is rotatably arranged inside the sleeve (6); a first bearing (7) is fixedly inserted on the rotating shaft (3); a second bearing (8) is fixedly inserted on the rotating shaft (3); The inner wall surface of the sleeve (6) is provided with a snap-fit ​​groove (9), the inner bottom surface of the snap-fit ​​groove (9) is provided with a closed groove (10), the surface of the rotating shaft (3) is provided with a fixed groove (11), the inner bottom surface of the fixed groove (11) is provided with a connecting groove (12), the inner wall surface of the inner ring of the first bearing (7) is fixedly inserted in the fixed groove (11), the first bearing (7) is snap-fitted to one side of the inner part of the fixed groove (11), and the second bearing (8) is snap-fitted to one side of the inner part of the snap-fit ​​groove (9) and the closed groove (10).

2. The outer rotor motor with dustproof function according to claim 1, characterized in that: An exhaust fan (13) is rotatably arranged inside the housing (1), a fitting groove (14) is provided on one side of the exhaust fan (13), a through hole (15) is provided on one side inside the fitting groove (14), the through hole (15) is rotatably inserted with the rotating shaft (3), and a nut (23) is threadedly connected to the rotating shaft (3).

3. The outer rotor motor with dustproof function according to claim 1, characterized in that: A switch (16) is arranged inside the housing (1), a fixing hole (17) is provided on the surface of the housing (1), and the switch (16) is fixedly inserted into the fixing hole (17).

4. The outer rotor motor with dustproof function according to claim 1, characterized in that: The inner wall surface of the sleeve (6) is provided with a storage groove (19), and a blocking arc plate (20) is slidably arranged inside the storage groove (19).

5. The outer rotor motor with dustproof function according to claim 2, characterized in that: A bonding plate (21) is arranged inside the bonding groove (14), and an adhesive plate (22) is arranged on the other side of the housing (1).

6. The outer rotor motor with dustproof function according to claim 1, characterized in that: An indication mark (18) is provided on the surface of the housing (1).

Images