A carbon brush fixing assembly of a direct current brush motor and a direct current brush motor

Abstract

A carbon brush fixing assembly of a direct current brush motor, comprising a wiring terminal, a carbon brush, a carbon brush fixing seat and a carbon brush lead wire; the wiring terminal comprises a mounting plate, a wiring piece and a wire clamping piece, one end of the wiring piece is connected with the mounting plate, the other end of the wiring piece extends downwards from the mounting plate, one end of the wire clamping piece is connected with the mounting plate, the other end of the wire clamping piece extends upwards from the mounting plate, a U-shaped clamping groove is arranged on the wire clamping piece, the opening of the U-shaped clamping groove faces upwards and penetrates through both sides of the wire clamping piece; the carbon brush is fixed on the mounting plate through the carbon brush fixing seat; one end of the carbon brush lead wire is connected with the carbon brush, the other end of the carbon brush lead wire is clamped in the U-shaped clamping groove and is welded and fixed. The utility model also provides a direct current brush motor using the carbon brush fixing assembly. Compared with the prior art, the carbon brush fixing assembly of the utility model simplifies the assembly steps through the U-shaped clamping groove and improves the assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of carbon brush fixing components, specifically relating to a carbon brush fixing component for a DC brushed motor, and a DC brushed motor using the carbon brush fixing component. Background Technology

[0002] In existing brushed DC motors, the carbon brush leads are fixed to the terminals by welding. To facilitate welding and improve the reliability of the connection between the carbon brush leads and the terminals, the terminals are equipped with structures to fix the carbon brush leads, such as the brushed DC motor disclosed in application number CN200910107247.2, where the terminals have through holes through which the carbon brush leads pass and are fixed to the terminals. In actual assembly, the carbon brush leads need to be aligned with the through holes of the terminals, then passed through the through holes, and then pulled to extend the leads to the other side. The entire process is cumbersome and inefficient. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a carbon brush fixing assembly for a DC brushed motor.

[0004] To achieve the above objectives, this utility model discloses a carbon brush fixing assembly for a DC brushed motor, including a terminal block, a carbon brush, a carbon brush fixing base, and a carbon brush wire.

[0005] The terminal block includes a mounting plate, a connector, and a wire clamp. One end of the connector is connected to the mounting plate, and the other end of the connector extends downward from the mounting plate. One end of the wire clamp is connected to the mounting plate, and the other end of the wire clamp extends upward from the mounting plate. The wire clamp has a U-shaped groove with the opening facing upward and extending through both sides of the wire clamp.

[0006] The carbon brush is fixed to the mounting plate by the carbon brush holder;

[0007] One end of the carbon brush wire is connected to the carbon brush, and the other end of the carbon brush wire is inserted into the U-shaped slot and welded in place.

[0008] In one embodiment, the wire clip is L-shaped and includes a horizontally arranged first connecting part and a wire-clamping part erected on the first connecting part. The first connecting part is connected to the mounting plate, and the wire-clamping part is provided with a U-shaped groove. The length direction of the U-shaped groove is the same as the length direction of the carbon brush.

[0009] In another embodiment, the opening width of the U-shaped slot gradually increases.

[0010] In another embodiment, the width of the U-shaped slot does not exceed the width of the carbon brush wire.

[0011] In another embodiment, the carbon brush holder is inverted U-shaped and includes a pressing block and a first limiting block and a second limiting block respectively disposed on both sides of the pressing block. The bottom surface of the pressing block abuts against the top surface of the carbon brush, and the two opposite surfaces of the first limiting block and the second limiting block respectively limit the two sides of the carbon brush.

[0012] The bottom of both the first limiting block and the second limiting block is provided with a second connecting part, and the carbon brush fixing seat is fixed to the mounting plate through the second connecting part.

[0013] In another embodiment, the mounting plate is provided with through holes, which are arranged opposite to the second connecting parts. The second connecting parts are all bendable connecting strips, which are bent and flat after passing through the corresponding through holes.

[0014] In another embodiment, both the first limiting block and the second limiting block are provided with threading holes.

[0015] In another embodiment, the threading hole extends through one side of the corresponding limiting block along the length direction of the carbon brush.

[0016] This invention also provides a DC brushed motor using the above-mentioned carbon brush fixing assembly.

[0017] A DC brushed motor includes a housing, an end cover covering the end of the housing, a shaft, a commutator disposed on the shaft, and a carbon brush fixing assembly mounted on the end cover. The end of the carbon brush contacts the commutator, and the carbon brush fixing assembly is the carbon brush fixing assembly of any of the above-described DC brushed motors.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The wire clip has a U-shaped slot with the opening of the U-shaped slot facing upwards. When connecting the carbon brush wire to the terminal block, simply clip the carbon brush wire into the U-shaped slot and then solder it to fix the carbon brush wire. The assembly steps are simple and improve assembly efficiency.

[0020] The carbon brush is fixed to the terminal block mounting plate via a carbon brush holder, making the entire assembly compact. However, the carbon brush holder on the terminal block mounting plate can hinder the soldering of the carbon brush leads. This application addresses this by designing the wire clips to be vertically upwards, effectively increasing the height of the soldering position, reducing the interference space of the carbon brush holder on the soldering operation, and making the soldering of the carbon brush leads more convenient. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the carbon brush fixing assembly of the DC brushed motor in Example 1.

[0022] Figure 2 for Figure 1 A three-dimensional exploded view of the carbon brush fixing assembly of a DC brushed motor.

[0023] Figure 3 This is a three-dimensional structural diagram of the DC brushed motor in Example 2;

[0024] Figure 4 for Figure 3 A cross-sectional view of a DC brushed motor;

[0025] Terminal block 100; mounting plate 110; through hole 111; connector 120; wire clamping piece 130; first connecting part 131; wire clamping part 132; U-shaped slot 133; guide slope 134;

[0026] Carbon brush 200;

[0027] Carbon brush holder 300; pressing block 310; first limiting block 320; second limiting block 330; second connecting part 340; wire hole 350;

[0028] 400 carbon brush wire;

[0029] Housing 500; End cover 600; Shaft 700; Commutator 800. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] A carbon brush fixing assembly for a DC brushed motor includes a terminal block 100, a carbon brush 200, a carbon brush fixing seat 300, and carbon brush leads 400. The terminal block 100 includes a mounting plate 110, a connecting piece 120, and a wire clamping piece 130. One end of the connecting piece 120 is connected to the mounting plate 110, and the other end extends downwards from the mounting plate 110. One end of the wire clamping piece 130 is connected to the mounting plate 110, and the other end extends upwards from the mounting plate 110. The wire clamping piece 130 has a U-shaped groove 133, the opening of which faces upwards and extends through both sides of the wire clamping piece 130. The carbon brush 200 is fixed to the mounting plate 110 by the carbon brush fixing seat 300, wherein the carbon brush fixing seat 300 is used to fix the carbon brush 200 and is made of insulating material. One end of the carbon brush lead wire 400 is connected to the carbon brush 200 by soldering, and the other end of the carbon brush lead wire 400 is locked in the U-shaped slot 133 and fixed by soldering.

[0033] The wire clip 130 has a U-shaped slot 133 with its opening facing upwards. When connecting the carbon brush lead 400 to the terminal block 100, the carbon brush lead 400 is simply clipped into the U-shaped slot 133, and then soldered to fix it. The assembly steps are simple and improve assembly efficiency. The carbon brush 200 is fixed to the mounting plate 110 of the terminal block 100 by the carbon brush holder 300, making the entire assembly structure compact. The carbon brush holder 300 is fixed on the mounting plate 110 of the terminal block 100, which may hinder the soldering of the carbon brush lead 400. This application effectively increases the height of the soldering position by designing the wire clip 130 with a vertical upward structure, reducing the interference space of the carbon brush holder 300 on the soldering operation, and making the soldering of the carbon brush lead 400 more convenient.

[0034] In this embodiment, the wire clamping piece 130 is L-shaped and includes a horizontally arranged first connecting part 131 and a wire clamping part 132 erected on the first connecting part 131. The first connecting part 131 is connected to the mounting plate 110. The wire clamping part 132 is provided with the aforementioned U-shaped groove 133. The length direction of the U-shaped groove 133 is in the same direction as the length direction of the carbon brush. In this way, the two sides of the U-shaped groove 133 are not obstructed by the carbon brush fixing seat 300, which facilitates the soldering of the carbon brush wire 400.

[0035] In this embodiment, the opening width of the U-shaped slot 133 gradually increases, specifically forming a guide slope 134. The guide slope 134 can guide the carbon brush wire 400 to be inserted into the U-shaped slot 133, making assembly convenient.

[0036] In this embodiment, the width of the U-shaped slot 133 does not exceed the width of the carbon brush wire 400, so that the carbon brush wire 400 can be firmly secured in the U-shaped slot 133, thereby improving the connection reliability of the carbon brush wire 400.

[0037] In this embodiment, the carbon brush holder 300 is inverted U-shaped and includes a pressing block 310 and a first limiting block 320 and a second limiting block 330 respectively disposed on both sides of the pressing block 310. The bottom surface of the pressing block 310 presses against the top surface of the carbon brush, pressing the carbon brush onto the mounting plate 110; the two opposite surfaces of the first limiting block 320 and the second limiting block 330 respectively limit the two sides of the carbon brush. The bottom of both the first limiting block 320 and the second limiting block 330 is provided with a second connecting part 340, and the carbon brush holder 300 is fixed to the mounting plate 110 through the second connecting part 340, thus fixing the carbon brush.

[0038] The mounting plate 110 is provided with a through hole 111, which is opposite to the second connecting part 340. The second connecting part 340 is a bendable connecting strip. After the connecting strip passes through the corresponding through hole 111, it is bent and flat. The flat position can be on the bottom surface of the mounting plate 110, or the connecting strip passes through the through hole 111 and then through the end cover of the motor, and then bends and flat on the outer end surface of the end cover (this connection method is adopted in this embodiment), so as to finally fix the carbon brush holder 300.

[0039] The diagram only shows the state of the connecting strip before bending; the state after bending is not shown.

[0040] In this embodiment, both the first limiting block 320 and the second limiting block 330 are provided with a wire hole 350, through which the carbon brush wire can be connected to the carbon brush.

[0041] The wire hole passes through one side of the corresponding limiting block along the length of the carbon brush. This allows the carbon brush wire to be soldered onto the carbon brush first, and then the parts can be assembled, reducing the difficulty of soldering.

[0042] Example 2

[0043] A DC brushed motor includes a housing 500, an end cover 600 covering the end of the housing, a shaft 700, a commutator 800 disposed on the shaft, and a carbon brush fixing assembly mounted on the end cover. The end of the carbon brush 200 contacts the commutator. The carbon brush fixing assembly adopts the carbon brush fixing assembly of the DC brushed motor of Embodiment 1.

[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A carbon brush fixing assembly for a DC brushed motor, characterized in that: Includes terminal blocks, carbon brushes, carbon brush holders, and carbon brush leads; The terminal block includes a mounting plate, a connector, and a wire clamp. One end of the connector is connected to the mounting plate, and the other end of the connector extends downward from the mounting plate. One end of the wire clamp is connected to the mounting plate, and the other end of the wire clamp extends upward from the mounting plate. The wire clamp has a U-shaped groove with the opening facing upward and extending through both sides of the wire clamp. The carbon brush is fixed to the mounting plate by the carbon brush holder; One end of the carbon brush wire is connected to the carbon brush, and the other end of the carbon brush wire is inserted into the U-shaped slot and welded in place.

2. The carbon brush fixing assembly for a DC brushed motor according to claim 1, characterized in that: The wire clip is L-shaped and includes a horizontally arranged first connecting part and a wire-clamping part erected on the first connecting part. The first connecting part is connected to the mounting plate, and the wire-clamping part is provided with a U-shaped groove. The length direction of the U-shaped groove is the same as the length direction of the carbon brush.

3. The carbon brush fixing assembly for a DC brushed motor according to claim 1, characterized in that: The opening width of the U-shaped slot gradually increases.

4. The carbon brush fixing assembly for a DC brushed motor according to claim 1, characterized in that: The width of the U-shaped slot shall not exceed the width of the carbon brush wire.

5. The carbon brush fixing assembly for a DC brushed motor according to claim 1, characterized in that: The carbon brush holder is inverted U-shaped and includes a pressing block and a first limiting block and a second limiting block respectively disposed on both sides of the pressing block. The bottom surface of the pressing block abuts against the top surface of the carbon brush, and the two opposite surfaces of the first limiting block and the second limiting block respectively limit the two sides of the carbon brush. The bottom of both the first limiting block and the second limiting block is provided with a second connecting part, and the carbon brush fixing seat is fixed to the mounting plate through the second connecting part.

6. The carbon brush fixing assembly for a DC brushed motor according to claim 5, characterized in that: The mounting plate is provided with through holes, which are positioned opposite to the second connecting parts. The second connecting parts are all bendable connecting strips, which are bent and flattened after passing through the corresponding through holes.

7. The carbon brush fixing assembly for a DC brushed motor according to claim 5, characterized in that: Both the first and second limit blocks are provided with threading holes.

8. The carbon brush fixing assembly for a DC brushed motor according to claim 7, characterized in that: The threading hole extends along the length of the carbon brush through one side of the corresponding limiting block.

9. A DC brushed motor, comprising a housing, an end cover covering one end of the housing, a shaft, a commutator disposed on the shaft, and a carbon brush fixing assembly mounted on the end cover, wherein the ends of the carbon brushes are in contact with the commutator, characterized in that: The carbon brush fixing assembly is the carbon brush fixing assembly of the DC brushed motor according to any one of claims 1-8.

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