Direct-current brush motor

Abstract

The utility model discloses a direct-current brush motor, which comprises a motor shell, a front end cover arranged at the front end of the motor shell, a rear end cover arranged at the rear end of the motor shell, a second assembly sealing ring arranged at the matching position of the motor shell and the front end cover, and a first assembly sealing ring arranged at the matching position of the rear end cover and the motor shell. A rotating shaft is installed at the center position between the front end cover and the rear end cover. According to the utility model, the direct-current brush motor and the gearbox are simple and convenient to assemble. The assembly sealing ring II and the assembly sealing ring I are respectively arranged at the assembly positions of the motor shell, the front end cover and the rear end cover of the direct-current brush motor, so that the installation sealing performance of the front end cover and the rear end cover can be effectively ensured, the overall sealing performance in the motor shell is further ensured, and a good dustproof effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to direct current motors, and specifically relates to a brushed direct current motor. Background Art

[0002] A brushed DC motor is a rotating motor that contains a brush device that converts DC power into mechanical energy (DC motor) or mechanical energy into DC power (DC generator). Different from a brushless DC motor, the brush device is used to introduce or extract DC voltage and DC current. The brushed DC motor is the basis of all motors. It has the characteristics of fast starting, timely braking, smooth speed regulation over a wide range, and relatively simple control circuit. The motor spindle of a DC brushed motor is mostly a smooth axis structure, with a keyway machined on the outer diameter near the shaft end for torque transmission. When it is matched with a gearbox, a gear is added to the motor spindle for matching, resulting in the need to unpack the gearbox when assembling the DC brushed motor and the gearbox, which is inconvenient to operate. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a DC brushless motor. To solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0004] A brushless DC motor comprises a motor housing, a front end cover installed at the front end of the motor housing, a rear end cover installed at the rear end of the motor housing, a second assembly seal ring is provided at the matching position between the motor housing and the front end cover, a first assembly seal ring is provided at the matching position between the rear end cover and the motor housing, and a rotating shaft is provided at the center position between the front end cover and the rear end cover;

[0005] A stator is arranged on the inner wall of the motor housing, a rotor assembly is arranged on the rotating shaft inside the stator, rotor windings are arranged at both ends of the rotor assembly, and the stator is used to provide a stable magnetic field;

[0006] A gear shaft end is provided at the output end of the rotating shaft after passing through the front end cover, and a shaft tooth protection sleeve is provided at the gear shaft end. A protective coil is provided on the outside of the rear end cover, and a wire is connected to the outside of the protective coil. A PVC sleeve is provided on the outside of the wire, and a connector is provided at the end of the wire for connecting to an external power supply.

[0007] Furthermore, a support bearing 1 is provided at the matching position between the rotating shaft and the front end cover, an oil seal is provided on the outside of the support bearing 1, and a matching sealing ring is provided at the matching position between the rotating shaft and the front end cover, located on the outside of the oil seal, to ensure the sealing of the matching between the rotating shaft and the front end cover.

[0008] Furthermore, a support bearing 2 is provided at the matching position between the rotating shaft and the rear end cover, an open retaining ring is provided on the rotating shaft on the side of the support bearing 2 close to the rotor winding, and a corrugated washer is provided on the other side of the support bearing 2 for installation and positioning of the support bearing 2.

[0009] Support bearing 1 and support bearing 2 are both made of deep groove ball bearings.

[0010] Furthermore, a commutator is installed on the rotating shaft between the open retaining ring and the rotor assembly, a brush body is arranged on the outer side of the commutator, the brush body is installed on a brush holder, and the brush holder is fixedly installed on the rear end cover for fixing the position of the brush body.

[0011] The DC brushed motor is installed in conjunction with the gearbox, which is equipped with a gear transmission assembly. When the gear shaft end is not assembled, the gear shaft end is protected by a shaft tooth protection sleeve; the gear shaft end on the rotating shaft meshes with the gear transmission assembly in the gearbox, and the gearbox is equipped with an output shaft, which is not concentric with the rotating shaft, and the gear shaft end can be directly plugged and installed in the reserved assembly hole of the gearbox.

[0012] The output end of the rotating shaft of the DC brush motor of the utility model is provided with a gear shaft end, which can directly cooperate with the gear assembly in the gearbox. When the DC brush motor and the gearbox are assembled, there is no need to open the gearbox. The gear shaft end can be directly plugged and installed in the reserved assembly hole, and the meshing between the gear shaft end and the gear is achieved by rotating the angle. After that, the assembly position can be sealed and connected, making the assembly of the DC brush motor and the gearbox simple and convenient.

[0013] The motor housing of the DC brushed motor of the utility model is respectively provided with an assembly sealing ring 2 and an assembly sealing ring 1 at the assembly positions of the front end cover and the rear end cover, which can effectively ensure the sealing of the installation of the front end cover and the rear end cover, and then ensure the overall sealing of the motor housing, and has a good dustproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the internal structure of the motor of the utility model;

[0015] Figure 2 This is a schematic diagram of the assembly of the motor and the gearbox of the utility model;

[0016] Figure 3 It is a schematic diagram of the cooperation between the motor main shaft and the gear structure inside the gearbox of the utility model.

[0017] In the figure: 1. Matching sealing ring; 2. Oil seal; 3. Front cover; 4. Rotor assembly; 5. Motor housing; 6. Stator; 7. Rotor winding; 8. Commutator; 9. Brush body; 10. Rear cover; 11. Brush holder; 12. Support bearing 1; 13. Rotating shaft; 14. Open retaining ring; 15. Support bearing 2; 16. Wave washer; 17. Protective coil; 18. PVC sleeve; 19. Wire; 20. Connector; 21. Assembly sealing ring 1; 22. Shaft gear protection sleeve; 23. Assembly sealing ring 2; 24. Gearbox; 25. Output shaft; 26. Gear shaft end; 27. Output protection sleeve. DETAILED DESCRIPTION

[0018] like Figures 1 to 3 As shown, the DC brush motor includes a motor housing 5, a front end cover 3 is installed at the front end of the motor housing 5, a rear end cover 10 is installed at the rear end of the motor housing 5, an assembly seal ring 23 is provided at the matching position of the motor housing 5 and the front end cover 3, an assembly seal ring 1 21 is provided at the matching position of the rear end cover 10 and the motor housing 5, and a rotating shaft 13 is installed at the center position between the front end cover 3 and the rear end cover 10;

[0019] A stator 6 is disposed on the inner wall of the motor housing 5, a rotor assembly 4 is disposed on the rotating shaft 13 inside the stator 6, and rotor windings 7 are disposed at both ends of the rotor assembly 4. The stator 6 is used to provide a stable magnetic field;

[0020] The output end of the rotating shaft 13 is provided with a gear shaft end 26 after passing through the front end cover 3, and the gear shaft end 26 is equipped with a shaft tooth protection sleeve 22. A protective coil 17 is provided on the outside of the rear end cover 10, and a wire 19 is connected to the outside of the protective coil 17. A PVC sleeve 18 is provided on the outside of the wire 19, and a connector 20 is provided at the end of the wire 19 for connecting to an external power supply.

[0021] Among them, a support bearing 12 is arranged at the matching position between the rotating shaft 13 and the front end cover 3, an oil seal 2 is arranged on the outside of the support bearing 12, and a matching sealing ring 1 is arranged at the matching position between the rotating shaft 13 and the front end cover 3, which is located on the outside of the oil seal 2 to ensure the sealing of the matching between the rotating shaft 13 and the front end cover 3.

[0022] Among them, a support bearing 2 15 is provided at the matching position between the rotating shaft 13 and the rear end cover 10, an open retaining ring 14 is provided on the rotating shaft 13 on the side of the support bearing close to the rotor winding 7, and a corrugated washer 16 is provided on the other side of the support bearing for installation and positioning of the support bearing 2 15.

[0023] The supporting bearing 12 and the supporting bearing 2 15 are both deep groove ball bearings.

[0024] Among them, a commutator 8 is installed on the rotating shaft 13 between the open retaining ring 14 and the rotor assembly 4, and a brush body 9 is arranged on the outside of the commutator 8. The brush body 9 is installed on the brush holder 11, and the brush holder 11 is fixedly installed on the rear end cover 10 for fixing the position of the brush body 9.

[0025] When in use, the DC brush motor is installed in conjunction with the gearbox 24, and a gear transmission assembly is provided in the gearbox 24. When the gear shaft end 26 is not assembled, the shaft tooth protection sleeve 22 is used to protect the gear shaft end 26; the gear shaft end 26 on the rotating shaft 13 meshes with the gear transmission assembly in the gearbox 24, and the gearbox 24 is provided with an output shaft 25, which is not concentric with the rotating shaft 13, and the gear shaft end 26 can be directly plugged and installed in the assembly reserved hole of the gearbox 24.

[0026] Before assembling the motor, all parts should be cleaned to prevent debris from entering the motor and causing malfunctions. The specific assembly process of the motor is as follows:

[0027] First, press the support bearing 12 of the rotor assembly 4, install the open retaining ring 14, then put the brush body 9 into the brush holder 11 component and insert it into the rear end of the rotating shaft 13, so that the brush body 9 is in good contact with the commutator 8, and then press the support bearing 2 15; then put the corrugated washer 16 into the bearing chamber of the rear end cover 10, and then put the rotor rear bearing into the bearing chamber; when putting it in, please note that the lead-out end of the brush holder 11 component corresponds to the lead-out end of the rear end cover 10, fix the brush holder 11 component on the rear end cover 10 with screws, and arrange the brush braids in the brush holder 11 component. The brush braids cannot contact the commutator 8, the motor housing 5, and the rear end cover 10;

[0028] When assembling the housing components, the N pole of the magnetic tile should be aligned and perpendicular to the black lead-out wire end of the brush holder 11. The two lead-out wires should be able to withstand a pulling force of 5Kg, and the black lead-out wire should be welded at the welding position of the brush holder 11 close to the lead-out hole. The motor nameplate is attached between the two motor fixing screws, on the back of the lead-out sheath, and the distance from the mating surface of the front cover 3 is 3mm. The motor runs smoothly without noise and has a clean appearance when it is not loaded. When the red lead is connected to the positive pole and the black lead is connected to the negative pole, the motor rotates clockwise when viewed from the extended end of the shaft. The motor lead is UL1015, AWG20, and the exposed length is 500±10mm. The motor can be used for forward and reverse rotation.

[0029] When it is transferred to the gearbox 24, it can be directly matched with the assembled gearbox 24. The gearbox 24 is provided with an assembly hole for installing the gear shaft end 26. The gear shaft end 26 is directly plugged and installed in the assembly hole. The gear shaft end 26 is directly plugged and installed, which is easy to operate.

Claims

1. A brushless DC motor, comprising a motor housing (5), a front end cover (3) mounted on the front end of the motor housing (5), and a rear end cover (10) mounted on the rear end of the motor housing (5), It is characterized in that A second assembly seal ring (23) is provided at the matching position between the motor housing (5) and the front end cover (3), a first assembly seal ring (21) is provided at the matching position between the rear end cover (10) and the motor housing (5), and a rotating shaft (13) is installed at the center position between the front end cover (3) and the rear end cover (10); A stator (6) is arranged on the inner wall of the motor housing (5), a rotor assembly (4) is arranged on the rotating shaft (13) inside the stator (6), and rotor windings (7) are arranged at both ends of the rotor assembly (4); The output end of the rotating shaft (13) is provided with a gear shaft end (26) after passing through the front end cover (3), and a shaft gear protection sleeve (22) is provided at the gear shaft end (26). A protective coil (17) is provided on the outside of the rear end cover (10), and a wire (19) is connected to the outside of the protective coil (17). A PVC sleeve (18) is provided on the outside of the wire (19), and a connector (20) is provided at the end of the wire (19).

2. The brushed DC motor according to claim 1, It is characterized in that A support bearing 1 (12) is provided at the matching position between the rotating shaft (13) and the front end cover (3), an oil seal (2) is provided on the outside of the support bearing 1 (12), and a matching sealing ring (1) is provided at the matching position between the rotating shaft (13) and the front end cover (3) and located on the outside of the oil seal (2).

3. The brushed DC motor according to claim 1, It is characterized in that A second support bearing (15) is provided at the matching position between the rotating shaft (13) and the rear end cover (10); an open retaining ring (14) is provided on the rotating shaft (13) on the side of the second support bearing (15) close to the rotor winding (7); and a wave washer (16) is provided on the other side of the second support bearing (15).

4. The brushed DC motor according to claim 3, It is characterized in that A commutator (8) is mounted on the rotating shaft (13) between the open retaining ring (14) and the rotor assembly (4), a brush body (9) is arranged outside the commutator (8), the brush body (9) is mounted on a brush holder (11), and the brush holder (11) is fixedly mounted on the rear end cover (10).

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