Brush motor

Abstract

The utility model discloses a brush motor, which comprises a shell, a stator and a rotor, the stator is fixedly arranged in the shell, the rotor is rotatably arranged in the stator, a rotating shaft is arranged on the rotor, the output end of the rotating shaft is connected with a reduction gearbox, one end of the rotating shaft far away from the reduction gearbox is provided with a commutator, and the bottom of the shell is provided with a rear cover assembly. The rear cover assembly comprises a carbon brush holder and an outer cover covering the outside of the carbon brush holder, a carbon brush is detachably arranged on the carbon brush holder and electrically connected with the commutator, an insertion sheet baffle covers the outside of the carbon brush and abuts against the carbon brush in a matched mode in the radial direction, and an installation notch correspondingly matched with the carbon brush is formed in the outer cover. The insertion sheet baffle is detachably arranged in the installation notch, the insertion sheet baffle is provided with a limiting protruding block, the carbon brush holder is provided with a limiting groove matched with the limiting protruding block in a limiting mode, the carbon brush is arranged in the rear cover assembly, when the carbon brush needs to be replaced, the outer cover, the PCB and the insertion sheet baffle only need to be disassembled in sequence, the carbon brush can be replaced, the replacement process is simplified, and time is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a brush motor. BACKGROUND

[0002] The brush motor is mainly composed of a stator, a rotor, a carbon brush and a commutator, the stator generates a fixed magnetic field, the rotor rotates in the magnetic field generated by the stator, the carbon brush and the commutator are used for conducting electricity and commutation in rotation to maintain the continuous rotation of the motor, when the brush motor works, the commutator rotates, but the carbon brush does not rotate, the alternating change of the current direction is completed by the commutator and the carbon brush, the carbon brush and the commutator are in constant contact and friction, and they play the role of conducting electricity and commutation in rotation. The carbon brush is an indispensable part of the brush motor, which is usually installed on the commutator of the motor, and the carbon brush will gradually wear out due to friction during the operation of the motor, so it needs to be replaced regularly. However, when the carbon brush needs to be replaced, the entire motor often needs to be disassembled, so that the carbon brush can be replaced, this process involves the disassembly of many parts, which is not only cumbersome to operate, but also significantly increases the complexity and time cost of maintenance work, therefore, it is necessary to improve. SUMMARY

[0003] The utility model discloses a brush motor, its simple and reasonable structure, convenient operation, carbon brush is arranged in the rear cover assembly, when needing to replace carbon brush, only need to take off the cover, PCB board and the insert piece baffle in proper order, can replace carbon brush, simplify the replacement process, save time.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model discloses a brush motor, including the casing, the stator and the rotor, the stator is fixedly arranged in the casing, the rotor is rotationally arranged in the stator, be provided with the pivot on the rotor, the output end of the pivot is connected with the reduction gearbox, and the one end of the pivot away from the reduction gearbox is equipped with the commutator, the bottom of the casing is provided with the rear cover assembly, the rear cover assembly includes the carbon brush holder and the cover of the carbon brush holder outside, the carbon brush holder is detachably provided with the carbon brush, the carbon brush is electrically connected with the commutator, the outside cover of the carbon brush is equipped with the insert piece baffle, the insert piece baffle and the carbon brush are matched with the radial resistance, the casing is provided with the installation gap that corresponds with the carbon brush cooperation, the insert piece baffle is detachably arranged in the installation gap, the insert piece baffle is provided with the limit lug, and the carbon brush holder is provided with the limit slot that is limited with the limit lug cooperation.

[0006] Further, the PCB board is also arranged in the cover, the PCB board is electrically connected with the stator, the copper sheet is integrally connected on the carbon brush, and the copper sheet is electrically connected with the PCB board.

[0007] Further, a signal interface is arranged on the outer cover and electrically connected with the PCB.

[0008] Further, a power interface is further arranged on the outer cover and electrically connected with the PCB.

[0009] Further, an installation slot hole for mounting the carbon brush is arranged on the carbon brush holder, and an insertion slot is arranged on both sides of the installation slot hole, and the insertion piece baffle is inserted and matched with the insertion slot.

[0010] Further, an elastic insertion part is arranged on both ends of the insertion piece baffle and extended inwardly, the insertion part is inserted and matched with the insertion slot, and the free end of the insertion part is provided with the limiting block, and the limiting slot is arranged in the insertion slot.

[0011] Further, the insertion part is matched with the insertion piece baffle and arranged in a " " shape.

[0012] Further, the carbon brush comprises a carbon brush body and a connecting piece, the carbon brush body is connected to the connecting piece, and the insertion piece baffle is matched with the connecting piece in the radial direction.

[0013] Further, the speed reducer comprises a speed reducer shell, and the speed reducer shell is further used as the front cover of the shell and fixedly connected with the shell.

[0014] Further, a bearing is further arranged on one end of the rotating shaft close to the speed reducer, and the speed reducer shell is provided with an installation slot for mounting the bearing.

[0015] The brush motor simplifies the process of replacing the carbon brush, saves the time for replacing the carbon brush, and improves the operation efficiency and convenience.

[0016] The speed reducer comprises a speed reducer shell, and the speed reducer shell is further used as the front cover of the shell and fixedly connected with the shell. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the utility model;

[0018] Figure 2 is a sectional structure schematic view of the utility model;

[0019] Figure 3is the exploded schematic view of the utility model under the first visual angle;

[0020] Figure 4 is the exploded schematic view of the utility model under the second visual angle;

[0021] Figure 5 is the structural schematic view of carbon brush;

[0022] Figure 6 is the structural schematic view of insert piece baffle;

[0023] Figure 7 is the structural schematic view of carbon brush holder.

[0024] Figures 1-7 In the middle: 1, shell;11, installation gap;2, stator;3, rotating shaft;31, commutator;32, bearing;4, reduction box;41, reduction box shell;42, reduction box upper cover;43, worm wheel;44, worm;5, rear cover assembly;51, carbon brush holder;511, carbon brush;5111, copper sheet;5112, carbon brush body;5113, connecting piece;512, limiting groove;513, installation slot hole;514, insertion slot;52, cover;521, signal interface;522, power supply interface;53, insert piece baffle;531, plug-in part;5311, limiting lug;54, PCB board;6, adapter plate. Specific implementation

[0025] The utility model will be further described below in combination with the drawings.

[0026] As Figures 1-7 The utility model discloses a brush motor, including shell 1, stator 2 and rotor, stator 2 is fixedly arranged in shell 1, the rotor rotation is arranged in stator 2, be provided with rotating shaft 3 on the rotor, the output end of rotating shaft 3 is connected with reduction box 4, to reduce the rotation speed and improve the torque, the one end of rotating shaft 3 away from reduction box 4 is equipped with commutator 31, for changing the current direction, to guarantee the normal operation of motor, the bottom of shell 1 is provided with rear cover assembly 5, and rear cover assembly 5 includes carbon brush holder 51 and cover and is arranged outside carbon brush holder 51 cover 52, the detachable carbon brush 511 of being provided with on carbon brush holder 51 is convenient for maintenance and replacement, carbon brush 511 is electrically connected with commutator 31, and the outside cover of carbon brush 511 is equipped with insert piece baffle 53, refer to Figure 5The carbon brush 511 includes a carbon brush body 5112 and a connecting piece 5113, the carbon brush body 5112 is connected to the connecting piece 5113, the insert piece baffle 53 is in radial abutment with the connecting piece 5113, the carbon brush 511 is protected and is prevented from accidental movement, the shell 1 is provided with a mounting gap 11 corresponding to the carbon brush 511, the insert piece baffle 53 is detachably arranged in the mounting gap 11, so as to facilitate maintenance and replacement, the insert piece baffle 53 is provided with a limiting protrusion 5311, the carbon brush holder 51 is provided with a limiting groove 512 limiting cooperation with the limiting protrusion 5311, the limiting protrusion 5311 and the limiting groove 512 limiting cooperation, so that the insert piece baffle 53 is not easy to be separated from the carbon brush holder 51, and the stability and reliability of the connection are ensured.

[0027] Preferably, in the embodiment, in order to improve the performance and reliability of the motor, referring to Figure 2 The carbon brush 511 is provided with two, the two carbon brushes 511 are symmetrically arranged along the axis of the commutator 31, which can uniformly distribute the current and improve the service life and operating efficiency of the motor.

[0028] Preferably, in the embodiment, referring to Figure 7 The carbon brush holder 51 is provided with a mounting groove hole 513 for mounting the carbon brush 511, and the two sides of the mounting groove hole 513 are provided with an insertion groove 514, and the insert piece baffle 53 is inserted and matched with the insertion groove 514, which makes the installation and replacement of the carbon brush 511 more convenient.

[0029] Preferably, in the embodiment, referring to Figure 6 The two ends of the insert piece baffle 53 extend inwardly and are provided with an elastic insertion part 531, the insertion part 531 is inserted and matched with the insertion groove 514, which ensures that the insert piece baffle 53 will not easily fall off during use, the free end of the insertion part 531 is provided with the limiting protrusion 5311, the insertion groove 514 is provided with the limiting groove 512, and the limiting protrusion 5311 is limited and matched with the limiting groove 512, so as to fix the position of the insert piece baffle 53 in the insertion groove 514 and prevent unnecessary movement.

[0030] Preferably, in the embodiment, the insertion part 531 is matched with the insert piece baffle 53 and is arranged in a " " shape, which is beautiful and can better be inserted and matched with the carbon brush holder 51.

[0031] Preferably, in the embodiment, referring to Figures 3-4The outer cover 52 is further provided with a PCB 54, which is electrically connected with the stator 2 and used for controlling the motor, and the copper sheet 5111 is integrally connected with the carbon brush 511, the carbon brush body 5112, the connecting sheet 5113 and the copper sheet 5111 are integrally arranged, and the copper sheet 5111 is electrically connected with the PCB 54. Specifically, the carbon brush 511 is installed in the rear cover assembly 5, when the carbon brush 511 needs to be replaced, the user only needs to first remove the outer cover 52, then remove the PCB 54, and then remove the plug-in sheet baffle 53, so that the carbon brush 511 can be easily replaced. The design simplifies the process of replacing the carbon brush 511, saves the time of replacing the carbon brush 511, and improves the operation efficiency and convenience.

[0032] Preferably, in the embodiment, referring to Figure 1 The outer cover 52 is provided with a signal interface 521, which is electrically connected with the PCB 54, and the signal interface 521 is used for connecting a signal line.

[0033] Preferably, in the embodiment, referring to Figure 1 The outer cover 52 is further provided with a power supply interface 522, which is electrically connected with the PCB 54, and the power supply interface 522 is used for externally connecting a power supply line.

[0034] Preferably, in the embodiment, referring to Figures 3-4 The speed reducer 4 comprises a speed reducer shell 41, which is also used as the front cover of the shell 1 and fixedly connected with the shell 1. The speed reducer shell 41 is also used as the front cover of the shell 1, which saves the cost, and the integrated design makes the overall structure more compact. Preferably, in the embodiment, the speed reducer shell 41 is further fixedly connected with the adapter plate 6. The speed reducer 4 further comprises a speed reducer upper cover 42, a worm wheel 43 and a worm 44. The speed reducer upper cover 42 is detachably fixedly connected with the speed reducer shell 41. The worm 44 is fixedly connected with the rotating shaft 3. The worm wheel 43 is engaged with the worm 44.

[0035] Preferably, in the embodiment, referring to Figure 2 The rotating shaft 3 is further provided with a bearing 32 at one end close to the speed reducer 4. The speed reducer shell 41 is provided with a mounting groove for mounting the bearing 32, so as to ensure the stable and reliable mounting of the bearing 32.

[0036] The above only describes a preferred embodiment of the utility model, and equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application range are included in the utility model patent application range.

Claims

1. A brushed motor, comprising a housing (1), a stator (2), and a rotor, wherein the stator (2) is fixedly disposed within the housing (1), the rotor is rotatably disposed within the stator (2), a rotating shaft (3) is disposed on the rotor, a gearbox (4) is connected to the output end of the rotating shaft (3), a commutator (31) is disposed at the end of the rotating shaft (3) away from the gearbox (4), and a rear cover assembly (5) is disposed at the bottom of the housing (1), characterized in that: The rear cover assembly (5) includes a carbon brush holder (51) and an outer cover (52) covering the outside of the carbon brush holder (51). A carbon brush (511) is detachably arranged on the carbon brush holder (51). The carbon brush (511) is electrically connected to a commutator (31). An insertion piece baffle (53) is arranged outside the carbon brush (511). The insertion piece baffle (53) is in radial abutting fit with the carbon brush (511). An installation notch (11) corresponding to the carbon brush (511) is arranged on the housing (1). The insertion piece baffle (53) is detachably arranged in the installation notch (11). A limiting convex block (5311) is arranged on the insertion piece baffle (53). A limiting groove (512) for limiting cooperation with the limiting convex block (5311) is arranged on the carbon brush holder (51).

2. A brushed motor according to claim 1, characterized in that: A PCB board (54) is further arranged in the outer cover (52). The PCB board (54) is electrically connected to a stator (2). A copper piece (5111) is integrally connected to the carbon brush (511). The copper piece (5111) is electrically connected to the PCB board (54).

3. A brushed motor according to claim 2, characterized in that: A signal interface (521) is arranged on the outer cover (52). The signal interface (521) is electrically connected to the PCB board (54).

4. A brushed motor according to claim 2, characterized in that: A power supply interface (522) is further arranged on the outer cover (52). The power supply interface (522) is electrically connected to the PCB board (54).

5. A brushed motor according to claim 1, characterized in that: An installation slot hole (513) for installing the carbon brush (511) is arranged on the carbon brush holder (51). Slots (514) are arranged on both sides of the installation slot hole (513). The insertion piece baffle (53) is in plug-in fit with the slots (514).

6. A brushed motor according to claim 5, characterized in that: Elastic insertion parts (531) extending inwards are arranged at both ends of the insertion piece baffle (53). The insertion parts (531) are in plug-in fit with the slots (514). The free ends of the insertion parts (531) are provided with the limiting convex blocks (5311). The limiting grooves (512) are arranged in the slots (514).

7. A brushed motor according to claim 6, characterized in that: The insertion part (531) and the insertion piece baffle (53) are arranged in a "C" shape in cooperation.

8. A brushed motor according to claim 1, characterized in that: The carbon brush (511) includes a carbon brush body (5112) and a connecting piece (5113). The carbon brush body (5112) is connected to the connecting piece (5113). The insertion piece baffle (53) is in radial abutting fit with the connecting piece (5113).

9. A brushed motor according to claim 1, characterized in that: The reduction gearbox (4) includes a reduction gearbox housing (41). The reduction gearbox housing (41) also serves as the front cover of the housing (1) and is fixedly connected to the housing (1).

10. A brushed motor according to claim 9, characterized in that: A bearing (32) is further arranged at one end of the rotating shaft (3) close to the reduction gearbox (4). The reduction gearbox housing (41) is provided with an installation slot for installing the bearing (32).

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