Carbon brush and brush holder device for generator

Abstract

The utility model relates to the technical field of power equipment, in particular to a carbon brush and a brush holder device for a generator. A carbon brush and brush holder device for a generator comprises a brush holder and at least one carbon brush, the brush holder comprises a brush box and a connecting plate, the outer wall of the brush box is fixedly connected with the bottom of one side of the connecting plate, the brush box is provided with a fixing groove, the groove bottom of the fixing groove is communicated with the bottom surface of the brush box, and the connecting plate is fixedly connected with the fixing groove. A plurality of uniformly spaced partition plates are arranged in the fixing groove, the partition plates divide the fixing groove into a plurality of placement grooves, the tops of the carbon brushes are matched with the placement grooves, hooks are fixedly connected to the sides, away from the connecting plate, of the top surfaces of the carbon brushes, and elastic pieces are arranged on the top surfaces of the carbon brushes. According to the utility model, the carbon brush can be prevented from moving excessively towards the collector ring of the motor through the hook arranged on the carbon brush, the carbon brush can be replaced more safely, and the bottom of the carbon brush is arranged to be the arc-shaped groove in advance, so that the carbon brush can be in full contact with the collector ring.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a carbon brush and brush holder device for a generator. Background Technology

[0002] Carbon brushes are devices that transmit energy or signals between the stationary and rotating parts of an electric motor, generator, or other rotating machinery. They are generally made of pure carbon with a coagulant, and are typically square in shape, held in place by a metal bracket. A spring inside presses them firmly against the slip rings on the shaft. When the motor rotates, it transmits electrical energy to the coils through the commutator. Because their main component is carbon, they are called carbon brushes, and they are prone to wear. Replacing carbon brushes requires pulling the brush braid with one hand and installing the brush holder with the other. However, regulations strictly prohibit using both hands simultaneously when replacing generator carbon brushes to prevent short circuits or grounding. Replacing carbon brushes with both hands increases the operational risk.

[0003] The contact surfaces between the generator carbon brushes and slip rings are flat and curved. Considering the size of the contact surface and current distribution after replacement, only a small number of carbon brushes are replaced each time, and after a short break-in period, the remaining brushes are gradually replaced. This requires workers to frequently replace generator carbon brushes, increasing both workload and safety. Utility Model Content

[0004] The purpose of this invention is to provide a carbon brush and brush holder device for a generator, which solves the problem of danger in the replacement of carbon brushes.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A carbon brush and brush holder device for a generator includes a brush holder and at least one carbon brush. The brush holder includes a brush box and a connecting plate. The outer wall of the brush box is fixedly connected to the bottom of one side of the connecting plate. A fixing groove is provided on the brush box, and the bottom of the fixing groove communicates with the bottom surface of the brush box. A plurality of evenly spaced partitions are provided inside the fixing groove, dividing the fixing groove into a plurality of placement slots. The top of the carbon brush mates with a placement slot. A hook is fixedly connected to the top surface of the carbon brush on the side away from the connecting plate. An elastic element is provided on the top surface of the carbon brush.

[0007] A further technical solution is to provide an arc-shaped groove on the bottom surface of the carbon brush.

[0008] A further technical solution is that the elastic element is a spiral spring, the fixed end of the spiral spring is fixedly connected to the connecting plate, and the bottom of the spiral spring contacts the top surface of the carbon brush.

[0009] A further technical solution is to fix a wear-resistant pad adapted to a spiral spring to the top surface of the carbon brush.

[0010] A further technical solution is to provide a handle on the top of the connecting plate, the handle including a grip and a connecting rod, a fixing hole on the top surface of the connecting plate, and a mounting block that seals the opening of the fixing hole fixedly connected inside the fixing hole, a mating groove on the top surface of the mounting block, the bottom of the mating groove communicating with the bottom surface of the mounting block, a limiting groove on the bottom surface of the mounting block, the axis of the limiting groove intersecting the axis of the mating groove, a limiting rod fitting in the limiting groove, and the bottom end of the connecting rod passing through the mating groove and being fixedly connected to the middle part of the limiting rod.

[0011] A further technical solution is to provide a movable plate inside the fixing hole, with the top surface of the movable plate in contact with the bottom surface of the mounting block, and the bottom surface of the movable plate connected to the bottom of the fixing hole by a spring.

[0012] A further technical solution is that the grip is made of a non-metallic material.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention prevents the carbon brush from moving excessively toward the slip ring of the motor by setting a hook on the carbon brush, making the carbon brush replacement work safer. The bottom of the carbon brush is pre-set as an arc-shaped groove, which allows the carbon brush to make full contact with the slip ring, and the current transmission efficiency will not be significantly reduced. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a side sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the top structure of the connecting plate in this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the mounting block in this utility model;

[0019] Figure 5 This is a side sectional view of the connecting plate in this utility model.

[0020] Icons: 1-Brush box, 2-Connecting plate, 3-Carbon brush, 4-Divider, 5-Placement slot, 6-Hook, 7-Elastic element, 8-Brush handle, 9-Wear pad, 10-Arc groove, 11-Grip, 12-Connecting rod, 13-Limiting rod, 14-Mounting block, 15-Fixing hole, 16-Matching groove, 17-Limiting groove, 18-Moving plate, 19-Spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Figures 1 to 5 This is an embodiment of the present utility model.

[0023] Example 1

[0024] A carbon brush and brush holder device for a generator includes a brush holder and at least one carbon brush 3. The brush holder includes a brush box 1 and a connecting plate 2. The outer wall of the brush box 1 is fixedly connected to the bottom of one side of the connecting plate 2. A fixing groove is provided on the brush box 1, and the bottom of the fixing groove communicates with the bottom surface of the brush box 1. Multiple evenly spaced partitions 4 are provided inside the fixing groove, dividing the fixing groove into multiple placement slots 5. The top of the carbon brush 3 engages with a placement slot 5. A hook 6 is fixedly connected to the top surface of the carbon brush 3 on the side away from the connecting plate 2. An elastic element 7 is provided on the top surface of the carbon brush 3. During wear, the carbon brush 3 gradually moves towards the slip ring on the generator until the hook 6 on the carbon brush 3 engages with the top of the brush box 1, preventing further movement. There is a sufficient safety distance between the brush tip 8 at the top of the carbon brush 3 and the slip ring, making it safer to replace the carbon brush 3 by holding the brush tip 8.

[0025] Example 2

[0026] Based on Embodiment 1, an arc-shaped groove 10 is provided on the bottom surface of the carbon brush 3. By pre-setting the bottom of the carbon brush 3 as an arc-shaped groove 10, the contact surface can be expanded, allowing the carbon brush 3 to make full contact with the slip ring on the motor.

[0027] Example 3

[0028] Based on Embodiment 2, the elastic element 7 is a spiral spring, the fixed end of which is fixedly connected to the connecting plate 2, and the bottom of the spiral spring contacts the top surface of the carbon brush 3. The spiral spring enables the carbon brush 3 to always move towards the slip ring of the motor at any angle.

[0029] Example 4

[0030] Based on Example 3, a wear-resistant pad 9 adapted to the spiral spring is fixedly connected to the top surface of the carbon brush 3. The wear-resistant pad 9 can reduce the wear caused by the friction between the spiral spring and the carbon brush 3.

[0031] Example 5

[0032] Based on embodiment 4, a handle is provided on the top of the connecting plate 2. The handle includes a grip 11 and a connecting rod 12. A fixing hole 15 is provided on the top surface of the connecting plate 2. A mounting block 14, which closes the opening of the fixing hole 15, is fixedly connected inside the fixing hole 15. A mating groove 16 is provided on the top surface of the mounting block 14. The bottom of the mating groove 16 communicates with the bottom surface of the mounting block 14. A limiting groove 17 is provided on the bottom surface of the mounting block 14. The axis of the limiting groove 17 intersects the axis of the mating groove 16. A limiting rod 13 fits in the limiting groove 17. The bottom end of the connecting rod 12 passes through the mating groove 16 and is fixedly connected to the middle of the limiting rod 13. During the process of installing the brush holder onto the motor, the brush holder and carbon brush 3 can be easily moved and transported by controlling the handle. Moreover, the handle can be removed from the brush holder to avoid affecting the normal operation of the motor.

[0033] Example 6

[0034] Based on embodiment 5, a movable plate 18 is provided inside the fixing hole 15. The top surface of the movable plate 18 contacts the bottom surface of the mounting block 14, and the bottom surface of the movable plate 18 is connected to the bottom of the fixing hole 15 by a spring 19. After the handle is installed on the connecting plate 2, the movable plate 18 can restrict the position of the limiting rod 13 to prevent the handle from sliding relative to the connecting plate 2 and affecting the handling of the brush grip.

[0035] Example 7

[0036] Based on embodiment 6, the grip 11 is made of non-metallic material. Non-metallic material can insulate against current, effectively preventing short circuits or grounding when replacing carbon brush 3.

[0037] Working principle: When in use, insert the carbon brush 3 into the placement slot 5 on the brush box. The hook on the top of the carbon brush 3 engages with the top of the placement slot 5. Then, install the elastic element 7 onto the connecting plate 2. Finally, fix the brush holder to the components on the motor. The elastic element 7 applies force to the carbon brush 3 so that the carbon brush 3 can always be in contact with the slip ring on the motor. As the motor operates and the carbon brush 3 gradually wears down, the hook 6 can prevent the carbon brush 3 from moving excessively. There is a sufficient safety distance between the top of the carbon brush 3 and the slip ring, which makes it safer for the operator to hold the brush handle 8 on the top of the carbon brush 3 to replace the carbon brush 3.

[0038] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the drawings and claims disclosed herein. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A carbon brush and brush holder device for a generator, characterized in that: The device includes a brush holder and at least one carbon brush (3). The brush holder includes a brush box (1) and a connecting plate (2). The outer wall of the brush box (1) is fixedly connected to the bottom of one side of the connecting plate (2). A fixing groove is provided on the brush box (1). The bottom of the fixing groove is connected to the bottom surface of the brush box (1). Multiple evenly spaced partitions (4) are provided inside the fixing groove. The partitions (4) divide the fixing groove into multiple placement slots (5). The top of the carbon brush (3) is engaged with the placement slot (5). A hook (6) is fixedly connected to the top surface of the carbon brush (3) on the side away from the connecting plate (2). An elastic element (7) is provided on the top surface of the carbon brush (3).

2. The carbon brush and brush holder device for a generator according to claim 1, characterized in that: An arc-shaped groove (10) is provided on the bottom surface of the carbon brush (3).

3. The carbon brush and brush holder device for a generator according to claim 1, characterized in that: The elastic element (7) is a spiral spring. The fixed end of the spiral spring is fixedly connected to the connecting plate (2), and the bottom of the spiral spring is in contact with the top surface of the carbon brush (3).

4. A carbon brush and brush holder device for a generator according to claim 3, characterized in that: A wear-resistant pad (9) adapted to a spiral spring is fixedly connected to the top surface of the carbon brush (3).

5. A carbon brush and brush holder device for a generator according to claim 1, characterized in that: A handle is provided on the top of the connecting plate (2). The handle includes a grip (11) and a connecting rod (12). A fixing hole (15) is provided on the top surface of the connecting plate (2). An installation block (14) that closes the opening of the fixing hole (15) is fixedly connected inside the fixing hole (15). A mating groove (16) is provided on the top surface of the installation block (14). The bottom of the mating groove (16) is connected to the bottom surface of the installation block (14). A limiting groove (17) is provided on the bottom surface of the installation block (14). The axis of the limiting groove (17) intersects with the axis of the mating groove (16). A limiting rod (13) is fitted in the limiting groove (17). The bottom end of the connecting rod (12) passes through the mating groove (16) and is fixedly connected to the middle part of the limiting rod (13).

6. A carbon brush and brush holder device for a generator according to claim 5, characterized in that: A movable plate (18) is provided inside the fixed hole (15). The top surface of the movable plate (18) is in contact with the bottom surface of the mounting block (14). The bottom surface of the movable plate (18) is connected to the bottom of the fixed hole (15) by a spring (19).

7. A carbon brush and brush holder device for a generator according to claim 5, characterized in that: The grip (11) is made of non-metallic material.

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