A brush motor

Abstract

The utility model relates to a brush motor, including motor end cover and motor main body, the inside of motor main body is equipped with motor rotor, is equipped with respectively with motor rotor electric connection's anti -interference mechanism and brush assembly in motor end cover, and the anti -interference mechanism includes circuit board and rectifier assembly, and circuit board is electrically connected with rectifier assembly, and rectifier assembly and circuit board are respectively distributed in the outside position of brush assembly along the circumference, through setting apart rectifier assembly and circuit board, the overall thickness of circuit board can be relatively reduced, and rectifier assembly can utilize the space position of the outside periphery of brush assembly, thereby improving the space utilization efficiency inside motor end cover, relatively reduces the overall volume of brush motor.

Description

Technical Field

[0001] This utility model relates to the technical field of motor equipment, specifically to a brushed motor. Background Technology

[0002] A brushed motor is a DC motor that converts electrical energy into mechanical energy through mechanical commutation. To improve the stability of brushed motor operation, some brushed motors are equipped with an anti-interference mechanism. To relatively reduce the size of brushed motors, the anti-interference mechanism in some brushed motors is located inside the motor itself. However, the rectifier in the anti-interference mechanism is integrated onto the circuit board, resulting in a relatively large overall footprint, which is not conducive to further reducing the overall size of the brushed motor.

[0003] Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a brushed motor that can improve the space utilization efficiency inside the motor end cover, thereby relatively reducing the overall size of the brushed motor.

[0005] The purpose of this utility model is achieved as follows:

[0006] A brushed motor includes a motor end cover and a motor body. A motor rotor is provided inside the motor body. An anti-interference mechanism and a brush assembly are provided inside the motor end cover and are electrically connected to the motor rotor. The anti-interference mechanism includes a circuit board and a rectifier assembly. The circuit board and the rectifier assembly are electrically connected. The rectifier assembly and the circuit board are distributed circumferentially on the outer side of the brush assembly.

[0007] As a specific embodiment, the rectifier assembly includes a first rectifier and a second rectifier. The motor end cover is provided with positioning grooves for mounting the first rectifier and the second rectifier, respectively. The positioning grooves are recessed in the direction away from the motor body. The first rectifier and the second rectifier are respectively disposed in the two positioning grooves. The distance between the circuit board and the motor body is smaller than the distance between the first rectifier and the second rectifier and the motor body.

[0008] As a specific embodiment, the motor end cover has a mounting boss on the side facing away from the circuit board. The circuit board is connected and fixed to the end of the mounting boss facing the motor body. The mounting boss has a terminal positioning groove, and a terminal assembly is provided in the terminal positioning groove. The end of the terminal positioning groove facing the motor body is open and is blocked by the circuit board.

[0009] As a specific solution, the distance from the positioning groove to the opening end of the motor end cover is D1, 8cm≤D1≤8.5cm, and the distance from the mounting boss (12) to the opening end of the motor end cover (1) is D2, 0.8cm≤D2≤1cm.

[0010] As a specific embodiment, the terminal assembly includes a first terminal and a second terminal, the brush assembly includes a first brush and a second brush, the first and last ends of the first rectifier are electrically connected to the first terminal and the second brush respectively, and the first and last ends of the second rectifier are electrically connected to the second terminal and the second brush respectively.

[0011] As a specific embodiment, a grounding component is connected to the circuit board, and the grounding component extends at least partially outward from the outside of the motor end cover. The motor body is connected and cooperates with the motor end cover and the grounding component respectively.

[0012] The anti-interference mechanism also includes a varistor R, a first capacitor C1, a second capacitor C2 and a third capacitor C3 disposed on the circuit board, wherein the a terminal of the first capacitor C1, the b terminal of the third capacitor C3 and the i terminal of the first rectifier are electrically connected to the first terminal respectively.

[0013] The c-terminal of the second capacitor C2, the d-terminal of the third capacitor C3, and the j-terminal of the second rectifier are electrically connected to the second terminal, respectively.

[0014] The e terminal of the first capacitor C1, the f terminal of the second capacitor, and the g terminal of the grounding component are electrically connected. The h terminal of the grounding component is connected to the outer casing of the motor body and grounded through the outer casing of the motor body.

[0015] The k-terminal of the first rectifier is electrically connected to the l-terminal of the motor rotor and the m-terminal of the varistor R.

[0016] The n-terminal of the second rectifier is electrically connected to the o-terminal of the motor rotor and the p-terminal of the varistor R, respectively.

[0017] As a specific embodiment, the grounding component is strip-shaped, and the motor end cover is provided with a relief groove corresponding to the grounding component. The grounding component is at least partially embedded in the relief groove and is connected and cooperated with the relief groove and the motor body respectively.

[0018] As a specific embodiment, the first terminal and the second terminal, the first brush and the second brush are symmetrically distributed on the left and right sides of the motor end cover.

[0019] As a specific embodiment, the circuit board is provided with a plug hole, and the first terminal and the second terminal are respectively provided with plug pins corresponding to the plug hole. The plug pins are plugged into the plug hole to position and electrically connect the circuit board with the first terminal and the second terminal respectively, and the circuit board abuts against the first terminal and the second terminal respectively.

[0020] As a specific embodiment, the length of the motor end cover and the motor body is L, 18cm≤L≤23cm, the width of the motor end cover and the motor body is W, 18cm≤W≤23cm, the height of the motor end cover is H1, 8cm≤H1≤10cm, and the height of the motor body is H2, 23cm≤H2≤28cm.

[0021] The beneficial effects of this utility model are:

[0022] By separating the rectifier assembly and the circuit board, the overall thickness of the circuit board can be reduced, while the rectifier assembly can utilize the space around the outer edge of the brush assembly, thereby improving the space utilization efficiency inside the motor end cover and relatively reducing the overall size of the brushed motor. Attached Figure Description

[0023] Figure 1 This is an exploded view of an embodiment of the present utility model. Figure 1 .

[0024] Figure 2 This is an exploded view of an embodiment of the present utility model. Figure 2 .

[0025] Figure 3 This is an exploded view of an embodiment of the present utility model. Figure 3 .

[0026] Figure 4 This is an exploded view of an embodiment of the present utility model. Figure 4 .

[0027] Figure 5 This is a schematic diagram of the structure of the motor body in an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of the motor end cover in an embodiment of the present utility model. Figure 1 .

[0029] Figure 7 This is a schematic diagram of the structure of the motor end cover in an embodiment of the present utility model. Figure 2 .

[0030] Figure 8 This is a circuit diagram of an embodiment of the present invention. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] See Figures 1-8This brushed motor includes a motor end cover 1 and a motor body 2. A motor rotor 3 is located inside the motor body 2. An anti-interference mechanism and a brush assembly are located inside the motor end cover 1 and are electrically connected to the motor rotor 3. The anti-interference mechanism includes a circuit board 4 and a rectifier assembly 5. The circuit board 4 and the rectifier assembly 5 are electrically connected. The rectifier assembly 5 and the circuit board 4 are distributed circumferentially on the outer side of the brush assembly. By separating the rectifier assembly 5 and the circuit board 4, compared to mounting the rectifier assembly 5 on the circuit board 4, the overall thickness of the circuit board 4 can be relatively reduced. The rectifier assembly 5 can utilize the space around the outer side of the brush assembly, thereby improving the space utilization efficiency inside the motor end cover 1, relatively reducing the overall volume of the brushed motor, and making it more conducive to the further miniaturization of small motors.

[0033] Furthermore, the rectifier assembly includes a first rectifier 51 and a second rectifier 52. The motor end cover 1 is provided with positioning grooves 11 for installing the first rectifier 51 and the second rectifier 52 respectively. The positioning grooves 11 are recessed in the direction away from the motor body 2. The first rectifier 51 and the second rectifier 52 are respectively disposed in the two positioning grooves 11. The distance between the circuit board 4 and the motor body 2 is smaller than the distance between the first rectifier 51 and the second rectifier 52 and the motor body 2. The positioning grooves 11 can further improve the installation accuracy and connection stability of the rectifier assembly 5 and the motor end cover 1. At the same time, since the positioning grooves 11 are located on the outside of the brush assembly, their setting will not affect the original layout of the motor end cover 1. Therefore, the internal space of the motor end cover 1 can be utilized more efficiently.

[0034] Furthermore, a mounting boss 12 is provided on the side of the motor end cover 1 facing away from the circuit board 4. The circuit board 4 is connected and fixed to the end of the mounting boss 12 facing the motor body 2. The mounting boss 12 is provided with a terminal positioning groove 121. A terminal assembly is provided in the terminal positioning groove 121. The end of the terminal positioning groove 121 facing the motor body 2 is open and is covered by the circuit board 4. During assembly, the terminal assembly can be installed and fixed in the mounting boss 12 through the terminal positioning groove 121 first, and then the circuit board 4 is fixed in the open end of the mounting boss 12. This allows the terminal assembly to be installed and fixed under the joint action of the circuit board 4 and the mounting boss 12. At the same time, the distance between the circuit board 4 and the terminal assembly is relatively short, making it easy to make electrical connections.

[0035] Furthermore, the distance from the positioning groove 11 to the opening end of the motor end cover 1 is D1, 8cm≤D1≤8.5cm, and the distance from the mounting boss 12 to the opening end of the motor end cover 1 is D2, 0.8cm≤D2≤1cm.

[0036] Furthermore, the terminal assembly includes a first terminal 61 and a second terminal 62, the brush assembly includes a first brush 71 and a second brush 72, the first rectifier 51 is electrically connected to the first terminal 61 and the second brush 72 at both ends, and the second rectifier 52 is electrically connected to the second terminal 62 and the second brush 72 at both ends.

[0037] Furthermore, a grounding component 8 is connected to the circuit board 4. The grounding component 8 extends at least partially out of the outside of the motor end cover 1. The motor body 2 is connected and cooperates with the motor end cover 1 and the grounding component 8 respectively. The grounding component 8 does not need to be additionally led out to the outside of the motor, which simplifies the installation structure of the grounding component 8 and improves the assembly efficiency of the equipment.

[0038] like Figure 8 As shown, the anti-interference mechanism also includes a varistor R, a first capacitor C1, a second capacitor C2 and a third capacitor C3 disposed on the circuit board 4, and the a end of the first capacitor C1, the b end of the third capacitor C3 and the i end of the first rectifier 51 are electrically connected to the first terminal 61 respectively.

[0039] The c terminal of the second capacitor C2, the d terminal of the third capacitor C3, and the j terminal of the second rectifier 52 are electrically connected to the second terminal 62, respectively.

[0040] The e terminal of the first capacitor C1, the f terminal of the second capacitor, and the g terminal of the grounding component 8 are electrically connected. The h terminal of the grounding component 8 is connected to the outer casing of the motor body 2 and grounded through the outer casing of the motor body 2.

[0041] The k-terminal of the first rectifier 51 is electrically connected to the l-terminal of the motor rotor 3 and the m-terminal of the varistor R, respectively.

[0042] The n-terminal of the second rectifier 52 is electrically connected to the o-terminal of the motor rotor 3 and the p-terminal of the varistor R, respectively.

[0043] Furthermore, the grounding component 8 is strip-shaped, and the motor end cover 1 is provided with a relief groove 13 corresponding to the grounding component 8. The grounding component 8 is at least partially embedded in the relief groove 13 and is connected and cooperated with the relief groove 13 and the motor body 2 respectively. The relief groove 13 can play the role of installation positioning for the grounding component 8. At the same time, during the installation and connection of the motor end cover 1 and the motor body 2, the resistance of the installation and connection between the motor end cover 1 and the motor body 2 can be reduced, and the chance of the grounding component 8 breaking can be reduced.

[0044] Furthermore, the first terminal 61 and the second terminal 62, and the first brush 71 and the second brush 72 are symmetrically distributed on the left and right sides of the motor end cover 1, making the left and right sides of the motor end cover 1 more symmetrical and relatively reducing the chance of the motor end cover 1 shaking due to uneven weight distribution.

[0045] Furthermore, the circuit board 4 is provided with a plug hole 41, and the first terminal 61 and the second terminal 62 are respectively provided with plug pins 611 corresponding to the plug hole 41. The plug pins 611 are plugged into the plug hole 41 to position and electrically connect the circuit board 4 with the first terminal 61 and the second terminal 62 respectively. The circuit board 4 abuts against the first terminal 61 and the second terminal 62 respectively, which simplifies the installation structure of the circuit board 4 and the terminal assembly and achieves the effect of quick installation, fixation and electrical connection of the two.

[0046] Furthermore, the length of the motor end cover 1 and the motor body 2 is L, 18cm≤L≤23cm, the width of the motor end cover 1 and the motor body 2 is W, 18cm≤W≤23cm, the height of the motor end cover 1 is H1, 8cm≤H1≤10cm, and the height of the motor body 2 is H2, 23cm≤H2≤28cm.

[0047] The above embodiments are merely preferred embodiments of this utility model, and other implementations are also possible. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model, and all such equivalent modifications or substitutions are included within the scope set forth in the claims of this application.

Claims

1. A brushed motor, comprising a motor end cover (1) and a motor body (2), wherein a motor rotor (3) is disposed inside the motor body (2), and an anti-interference mechanism and a brush assembly electrically connected to the motor rotor (3) are disposed inside the motor end cover (1), characterized in that, The anti-interference mechanism includes a circuit board (4) and a rectifier assembly (5). The circuit board (4) is electrically connected to the rectifier assembly (5). The rectifier assembly (5) and the circuit board (4) are respectively distributed on the outer side of the brush assembly along the circumferential direction.

2. The brushed motor according to claim 1, characterized in that: The rectifier assembly (5) includes a first rectifier (51) and a second rectifier (52). The motor end cover (1) is provided with positioning grooves (11) for installing the first rectifier (51) and the second rectifier (52) respectively. The positioning grooves (11) are recessed in the direction away from the motor body (2). The first rectifier (51) and the second rectifier (52) are respectively disposed in the two positioning grooves (11). The distance between the circuit board (4) and the motor body (2) is smaller than the distance between the first rectifier (51) and the second rectifier (52) and the motor body (2).

3. The brushed motor according to claim 2, characterized in that: The motor end cover (1) has a mounting boss (12) on the side facing away from the circuit board (4). The circuit board (4) is connected and fixed to the end of the mounting boss (12) facing the motor body (2). The mounting boss (12) has a terminal positioning groove (121). The terminal positioning groove (121) has a terminal assembly. The end of the terminal positioning groove (121) facing the motor body (2) is open and blocked by the circuit board (4).

4. The brushed motor according to claim 3, characterized in that: The distance from the positioning groove (11) to the opening end of the motor end cover (1) is D1, 8cm≤D1≤8.5cm, and the distance from the mounting boss (12) to the opening end of the motor end cover (1) is D2, 0.8cm≤D2≤1cm.

5. The brushed motor according to claim 3, characterized in that: The terminal assembly includes a first terminal (61) and a second terminal (62), and the brush assembly includes a first brush (71) and a second brush (72). The first rectifier (51) is electrically connected to the first terminal (61) and the second brush (72) at both ends, and the second rectifier (52) is electrically connected to the second terminal (62) and the second brush (72) at both ends, respectively.

6. The brushed motor according to claim 5, characterized in that: A grounding component (8) is connected to the circuit board (4). The grounding component (8) extends at least partially out of the outside of the motor end cover (1). The motor body (2) is connected and cooperates with the motor end cover (1) and the grounding component (8) respectively. The anti-interference mechanism also includes a varistor R, a first capacitor C1, a second capacitor C2 and a third capacitor C3 disposed on the circuit board (4), wherein the a end of the first capacitor C1, the b end of the third capacitor C3 and the i end of the first rectifier (51) are electrically connected to the first terminal (61). The c terminal of the second capacitor C2, the d terminal of the third capacitor C3, and the j terminal of the second rectifier (52) are electrically connected to the second terminal (62) respectively; The e terminal of the first capacitor C1, the f terminal of the second capacitor, and the g terminal of the grounding component (8) are electrically connected. The h terminal of the grounding component (8) is connected to the outer shell of the motor body (2) and grounded through the outer shell of the motor body (2). The k-end of the first rectifier (51) is electrically connected to the l-end of the motor rotor (3) and the m-end of the varistor R, respectively. The n-end of the second rectifier (52) is electrically connected to the o-end of the motor rotor (3) and the p-end of the varistor R.

7. The brushed motor according to claim 6, characterized in that: The grounding component (8) is strip-shaped, and the motor end cover (1) is provided with a relief groove (13) corresponding to the grounding component (8). The grounding component (8) is at least partially embedded in the relief groove (13) and is connected and cooperated with the relief groove (13) and the motor body (2) respectively.

8. The brushed motor according to claim 5, characterized in that: The first terminal (61) and the second terminal (62), the first brush (71) and the second brush (72) are symmetrically distributed on the left and right sides of the motor end cover (1).

9. The brushed motor according to claim 5, characterized in that: The circuit board (4) is provided with a plug hole (41), and the first terminal (61) and the second terminal (62) are respectively provided with plug pins (611) corresponding to the plug hole (41). The plug pins (611) are plugged into the plug hole (41) to make the circuit board (4) positioned and electrically connected to the first terminal (61) and the second terminal (62) respectively. The circuit board (4) abuts against the first terminal (61) and the second terminal (62) respectively.

10. The brushed motor according to any one of claims 1-9, characterized in that: The length of the motor end cap (1) and the motor body (2) is L, 18cm≤L≤23cm, the width of the motor end cap (1) and the motor body (2) is W, 18cm≤W≤23cm, the height of the motor end cap (1) is H1, 8cm≤H1≤10cm, and the height of the motor body (2) is H2, 23cm≤H2≤28cm.

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