A carbon brush mounting structure for an electric motor

Abstract

The utility model relates to motor carbon brush technical field especially is a kind of motor carbon brush installation structure, including installation support, brush grip subassembly and carbon brush subassembly, and brush grip subassembly is fixedly connected with carbon brush subassembly in installation support top end through bolt, carbon brush subassembly one side is fixedly connected with elastic cylinder subassembly, and elastic cylinder subassembly inside is equipped with anti -drop subassembly, carbon brush subassembly includes electric contact block, and electric contact block one side is fixedly connected with external wire, and the positioning clamping hole is set up in external wire inside, and the electric contact block side close to elastic cylinder subassembly is fixedly connected with electric contact wire, and electric contact wire inside is electrically connected with carbon brush body, and elastic cylinder subassembly includes spring shell, and spring shell inside is equipped with movable post groove, in the utility model, device can effectively reduce the carbon brush position change and the abrasion inconsistent problem caused by vibration, to improve the performance and reliability of motor, to improve the performance and reliability of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor carbon brush technology, specifically to a motor carbon brush mounting structure. Background Technology

[0002] Motor carbon brushes are sliding contact components used for conducting electricity in motors. They are usually made of graphite or other carbon materials and are installed on the commutator or slip ring of the motor to realize the current transmission between the internal rotating parts of the motor and the external circuit, while reducing arcing and wear, and ensuring the efficient and stable operation of the motor.

[0003] The motor carbon brush mounting structure refers to the mechanical device that fixes the carbon brushes on the motor rotor or stator. It usually includes components such as carbon brush holder, carbon brush spring, carbon brush and insulating sleeve, which are used to ensure that the carbon brushes maintain stable electrical contact with the motor commutator or slip ring, while allowing the carbon brushes to move freely along the slip ring surface after wear, so as to maintain the normal operation of the motor.

[0004] When using brushed motors in equipment subjected to high-frequency vibration, the brushes may exert pressure on the springs due to the vibration. This pressure alters the friction between the brushes and the commutator, affecting the contact quality. Since motors typically have multiple brushes, vibration can cause uneven wear on each brush. Over long-term operation, this uneven wear may reduce the contact effect between the brushes and the commutator, thus affecting the motor's performance and reliability. Therefore, a motor brush mounting structure is proposed to address these issues. Utility Model Content

[0005] The purpose of this utility model is to provide a motor carbon brush mounting structure to solve the problem that, since motors usually have multiple carbon brushes installed, vibration may cause uneven wear on each carbon brush. Under long-term operation, this uneven wear may reduce the contact effect between the carbon brush and the commutator, thereby affecting the performance and reliability of the motor.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A motor carbon brush mounting structure includes a mounting bracket, a brush holder assembly, and a carbon brush assembly. The top of the mounting bracket is bolted to the brush holder assembly, and the carbon brush assembly is bolted to the inner side of the brush holder assembly. A flexible cylinder assembly is bolted to one side of the carbon brush assembly, and an anti-detachment component is installed inside the flexible cylinder assembly. The carbon brush assembly includes an electrical contact block, with an external wire bolted to one side of the contact block. A positioning hole is provided inside the external wire. An electrical wire is bolted to the side of the contact block near the flexible cylinder assembly, and the inner side of the electrical wire is electrically connected to the carbon brush body. The flexible cylinder assembly includes a spring housing, and the spring housing contains... The spring housing has a movable slot on its side. A first spring is fixedly connected to one side of the movable slot. A first sliding opening and a second sliding opening are provided at the end of the spring housing away from the first spring. The anti-detachment component includes an external post. An internal post block is fixedly connected to one side of the external post. A first rubber ring is fixedly connected to the inner side of the internal post block. An anti-rotation rod is slidably connected to the inner side of the internal post block. An inner hollow plate is fixedly connected to one side of the anti-rotation rod. A second spring is fixedly connected to one side of the inner hollow plate. A rubber cone is fixedly connected to one side of the second spring. A second rubber ring is fixedly connected to the inner side of the internal post block. An external through hole is provided on the inner side of the external post near the rubber cone.

[0008] As a further optimization of this utility model, the brush grip assembly includes a frame shell, a block groove at the upper end of the frame shell, a positioning groove at one end of the frame shell, an internally threaded block fixedly connected to the inner side of the block groove of the frame shell by bolts, a locking post fixedly connected to the bottom end of the internally threaded block, and ear seats fixed on both sides of the frame shell, the ear seats of the frame shell being fixed to the mounting bracket by bolts.

[0009] As a further optimization of this utility model, the inner side of the frame shell is hollow, the positioning groove penetrates one end of the frame shell, the lower end of the block groove is connected to the positioning groove, the locking pin is inserted into the lower end of the block groove, the shape of the internal thread block is rectangular, and the outer side of the internal thread block is in contact with the inner side of the upper end of the block groove.

[0010] As a further optimization of this utility model, the following features are provided: the electrical contact block is embedded in the inner side of the positioning groove, the locking pin is inserted into the positioning locking hole opened in the electrical contact block, the number of positioning locking holes is the same as the number of locking pins, and the outer side of the carbon brush body is clearance-fitted with the inner side of the frame shell.

[0011] As a further optimization of this utility model, the spring shell is fixedly connected to the electrical contact block on one side, the spring shell is a hollow cylinder, the movable groove passes through one end of the spring shell, the movable groove is shaped as a cylinder at both ends, the second sliding opening is distributed at the upper and lower ends of the first sliding opening, and both the first and second sliding openings pass through one end of the spring shell.

[0012] As a further optimization of this utility model, the inner side of the movable column groove of the spring shell fits against the outer side of the built-in column block, the inner side of the inner hollow plate is hollow, the first spring is embedded in the inner side of the inner hollow plate, one end of the first spring is fixedly connected to one side of the built-in column block, the outer side of the external column slides inside the first sliding opening of the spring shell, the diameter of the external column is 0.9 times the diameter of the first sliding opening, and an anti-rotation rod is slidably connected to the inner side of the second sliding opening of the spring shell.

[0013] As a further optimization of this utility model, the following features are provided: the external column is cylindrical; the inner side of the built-in column block near the anti-rotation rod has a cylindrical through hole; the second rubber ring is fixed inside the cylindrical through hole of the built-in column block; the inner side of the second rubber ring is in contact with the outer side of the anti-rotation rod; the end of the second spring away from the inner hollow plate is fixedly connected to the built-in column block; the rubber cone is conical; the outer side of the rubber cone is in contact with the inner side of the external through hole of the external column.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the device automatically adjusts the carbon brush position to adapt to carbon brush wear through the provided brush holder assembly, carbon brush assembly, elastic cylinder assembly, and anti-detachment assembly, ensuring that the contact between multiple carbon brushes and the commutator remains consistent. This design effectively reduces carbon brush position changes and inconsistent wear caused by vibration, thereby improving the performance and reliability of the motor. Through the combined action of springs, seals, and limiting structures, even in high-frequency vibration environments, good contact between the carbon brushes and the commutator can be maintained, reducing arcing and wear, and ensuring the efficient and stable operation of the motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the brush grip assembly structure of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the frame shell of this utility model;

[0019] Figure 4 This is a schematic diagram of the card post structure of this utility model;

[0020] Figure 5 This is a cross-sectional structural diagram of the spring shell of this utility model;

[0021] Figure 6 This is a schematic diagram of the first spring structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the external column structure of this utility model;

[0023] Figure 8 This utility model Figure 7 A schematic diagram of the structure at point A.

[0024] In the diagram: 1. Install the support;

[0025] 2. Brush grip assembly; 21. Frame housing; 22. Block groove; 23. Positioning groove; 24. Internal threaded block; 25. Locking post;

[0026] 3. Carbon brush assembly; 31. Electrical contact block; 32. External wiring; 33. Positioning clip; 34. Electrical contact wire; 35. Carbon brush body;

[0027] 4. Elastic cylinder assembly; 41. Spring housing; 42. Movable column groove; 43. First spring; 44. First sliding port; 45. Second sliding port;

[0028] 5. Anti-detachment component; 51. External post; 52. Internal post block; 53. First rubber ring; 54. Anti-rotation rod; 55. Inner hollow plate; 56. Second spring; 57. Rubber cone; 58. Second rubber ring; 59. External through hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Please see Figure 1-8 This utility model provides a technical solution:

[0032] A motor carbon brush mounting structure includes a mounting bracket 1, a brush holder assembly 2, and a carbon brush assembly 3. The top of the mounting bracket 1 is fixedly connected to the brush holder assembly 2 by bolts. The carbon brush assembly 3 is fixedly connected to the inside of the brush holder assembly 2 by bolts. An elastic cylinder assembly 4 is fixedly connected to one side of the carbon brush assembly 3. An anti-detachment component 5 is installed inside the elastic cylinder assembly 4. The carbon brush assembly 3 includes an electrical contact block 31. An external wire 32 is fixedly connected to one side of the electrical contact block 31. A positioning hole 33 is provided inside the external wire 32. An electrical wire 34 is fixedly connected to the side of the electrical contact block 31 near the elastic cylinder assembly 4. The inside of the electrical wire 34 is electrically connected to the carbon brush body 35. The elastic cylinder assembly 4 includes a spring shell 41. A movable groove 4 is provided inside the spring shell 41. 2. A first spring 43 is fixedly connected to one side of the movable column groove 42 of the spring shell 41. A first sliding opening 44 and a second sliding opening 45 are provided at the end of the spring shell 41 away from the first spring 43. The anti-detachment component 5 includes an external column 51. An internal column block 52 is fixedly connected to one side of the external column 51. A first rubber ring 53 is fixedly connected to the inside of the internal column block 52. An anti-rotation rod 54 is slidably connected to the inside of the internal column block 52. An inner hollow plate 55 is fixedly connected to one side of the anti-rotation rod 54. A second spring 56 is fixedly connected to one side of the inner hollow plate 55. A rubber cone 57 is fixedly connected to one side of the second spring 56. A second rubber ring 58 is fixedly connected to the inside of the internal column block 52. An external through hole 59 is provided on the inner side of the external column 51 near the rubber cone 57.

[0033] As a further implementation of this solution, the brush grip assembly 2 includes a frame shell 21. A block groove 22 is formed at the upper end of the frame shell 21, and a positioning groove 23 is formed at one end of the frame shell 21. An internally threaded block 24 is fixedly connected to the inner side of the block groove 22 by bolts. A locking post 25 is fixedly connected to the bottom end of the internally threaded block 24. Ear seats are fixed on both sides of the frame shell 21, and the ear seats of the frame shell 21 are fixed to the mounting bracket 1 by bolts. The inner side of the frame shell 21 is hollow. The positioning groove 23 penetrates one end of the frame shell 21, and the lower end of the block groove 22 communicates with the positioning groove 23. The locking post 25 is inserted into the lower end of the block groove 22. The internal thread block 24 is rectangular in shape. The outer side of the internal thread block 24 fits against the inner side of the upper end of the block groove 22. The electrical contact block 31 is embedded in the inner side of the positioning groove 23. The locking pin 25 is inserted into the positioning locking hole 33 opened in the electrical contact block 31. The number of positioning locking holes 33 is the same as the number of locking pins 25. The outer side of the carbon brush body 35 is fitted with the inner side of the frame shell 21 with a clearance. This improves the reasonable installation process of the device and makes it easy to fix the carbon brush assembly 3 stably inside the brush holder assembly 2, greatly reducing the installation deviation of the carbon brush assembly 3. This installation method allows the carbon brush assembly 3 to be disassembled and maintained later.

[0034] As a further implementation of this solution, one side of the spring shell 41 is fixedly connected to one side of the electrical contact block 31. The spring shell 41 is a hollow cylinder. The movable groove 42 passes through one end of the spring shell 41. The movable groove 42 is a cylinder with two ends. The second sliding opening 45 is distributed at the upper and lower ends of the first sliding opening 44. Both the first sliding opening 44 and the second sliding opening 45 pass through one end of the spring shell 41, which facilitates the anti-detachment component 5 to slide inside the elastic cylinder component 4, and at the same time prevents the anti-detachment component 5 from deflecting inside the spring shell 41.

[0035] As a further implementation of this solution, the inner side of the movable column groove 42 opened in the spring housing 41 is fitted with the outer side of the built-in column block 52. The inner side of the inner hollow plate 55 is hollow. The first spring 43 is embedded in the inner side of the inner hollow plate 55. One end of the first spring 43 is fixedly connected to one side of the built-in column block 52. The outer side of the external column 51 slides inside the first sliding opening 44 opened in the spring housing 41. The diameter of the external column 51 is 0.9 times the diameter of the first sliding opening 44. The inner side of the second sliding opening 45 opened in the spring housing 41 is slidably connected to the anti-rotation rod 54, which facilitates the first spring 43 to pass through the interior of the inner hollow plate 55 and be fixed with the built-in column block 52. Under the action of the elastic force of the first spring 43, the anti-detachment assembly 5 is kept moving towards the carbon brush body 35, so that the carbon brush body 35 remains in contact with the outer side of the commutator after wear.

[0036] As a further implementation of this solution, the external post 51 is cylindrical in shape, and the inner side of the internal post block 52 near the anti-rotation rod 54 has a cylindrical through hole. The second rubber ring 58 is fixed inside the cylindrical through hole of the internal post block 52, and the inner side of the second rubber ring 58 is in contact with the outer side of the anti-rotation rod 54. The end of the second spring 56 away from the inner hollow plate 55 is fixedly connected to the internal post block 52. The rubber cone 57 is conical in shape, and the outer side of the rubber cone 57 is in contact with the inner side of the external through hole 59 of the external post 51. This can prevent the carbon brush body 35 from moving when it is vibrated, prevent multiple carbon brush bodies 35 from colliding with the commutator due to vibration, thereby avoiding the problem of inconsistent wear of multiple carbon brush bodies 35, maintaining good contact between the carbon brush and the commutator, reducing arcing and wear, and ensuring the efficient and stable operation of the motor.

[0037] Workflow: When installing the device, one end of the spring shell 41 is fixed to the electrical contact block 31 with bolts, and the external connection post 51 is fixed to one side of the carbon brush body 35 with bolts. At this time, the elastic cylinder assembly 4 and the anti-detachment assembly 5 are between the carbon brush body 35 and the electrical contact block 31. The external wire 32 is passed through the inside of the positioning groove 23, and then the electrical contact block 31 is embedded in the inside of the positioning groove 23, so that the positioning card hole 33 is aligned with the lower end of the block groove 22. The card post 25 is aligned with the positioning card hole 33 and inserted into the inside of the positioning card hole 33 from the block groove 22. The internal thread block 24 is fixed to the frame shell 21 with bolts. The limiting of the card post 25 can ensure the accuracy of the installation between the carbon brush assembly 3 and the brush holder assembly 2. The external wire 32 is passed through the through hole of the mounting bracket 1, and the frame shell 21 is fixed to the mounting bracket 1 with bolts. The external wire 32 is electrically connected to the motor controller. At this time, the multiple carbon brush bodies 35 are in contact with the outside of the commutator.

[0038] To prevent collisions between the carbon brush body 35 and the commutator due to vibration and to improve the uniformity of wear on multiple carbon brush bodies 35, the carbon brush bodies 35 will wear during use. When the carbon brush body 35 wears down, the first spring 43 pushes the inner post 52 and the outer post 51 towards the carbon brush body 35. The outer post 51 slides inside the first sliding opening 44, and the inner post 52 slides inside the movable groove 42 opened in the spring housing 41. The first rubber ring 53 acts to support the inner post 52. The inner column 52 and the spring housing 41 are sealed together. The second rubber ring 58 seals the inner column 52 and the anti-rotation rod 54. The movement of the outer column 51 moves the carbon brush body 35, keeping it in contact with the outside of the commutator. When the inner column 52 moves, due to the sealing effect, the gas inside the movable column groove 42 is under-pressurized. At this time, the external gas enters the outer through hole 59 through the gap between the first sliding port 44 and the outer column 51. Under the action of air pressure... With the rubber cone 57 away from the outer through hole 59, air enters the movable groove 42 near the first spring 43 from the outer through hole 59. After the outer column 51 moves, the inner hollow plate 55 is pulled towards the inner column block 52 by the elastic force of the second spring 56. The inner hollow plate 55 drives the rubber cone 57 to seal the outer through hole 59 again. At this time, the movable groove 42 near the first spring 43 is in a closed state. When vibration occurs, the inner column block 52 will not move towards the first spring 43 because the shape of the rubber cone 57 does not allow the gas near the movable groove 42 to flow out from the outer through hole 59. This achieves the effect of limiting the inner column block 52, thereby preventing the carbon brush body 35 from moving when it is vibrated. At this time, the first spring 43 will not be elastically compressed due to vibration, which can prevent multiple carbon brush bodies 35 from colliding with the commutator due to vibration, thus avoiding the problem of inconsistent wear of multiple carbon brush bodies 35.

[0039] During device maintenance, when disassembling the device, remove the bolts between the internal threaded block 24 and the frame 21, then remove the bolts between the frame 21 and the mounting bracket 1, and disconnect the external wiring 32 from the motor controller. At this point, the carbon brush assembly 3 can be removed, the inner hollow plate 55 and the anti-rotation rod 54 can be fixed, and the external connecting post 51 can be moved away from the elastic cylinder assembly 4. At this point, the rubber cone 57 is away from the inside of the external through hole 59, and the external air is connected to the movable column groove 42 through the external through hole 59. At this point, the distance between the elastic cylinder assembly 4 and the anti-detachment assembly 5 can be adjusted at will.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor carbon brush mounting structure, comprising a mounting bracket (1), a brush holder assembly (2), and a carbon brush assembly (3), characterized in that: The top of the mounting bracket (1) is fixedly connected to a brush holder assembly (2) by bolts. The inner side of the brush holder assembly (2) is fixedly connected to a carbon brush assembly (3) by bolts. The carbon brush assembly (3) is fixedly connected to an elastic cylinder assembly (4) on one side. The inner side of the elastic cylinder assembly (4) is equipped with an anti-detachment assembly (5). The carbon brush assembly (3) includes an electrical contact block (31), an external wire (32) is fixedly connected to one side of the electrical contact block (31), a positioning hole (33) is provided on the inner side of the external wire (32), an electrical wire (34) is fixedly connected to the side of the electrical contact block (31) near the elastic cylinder assembly (4), and the inner side of the electrical wire (34) is electrically connected to the carbon brush body (35). The elastic cylinder assembly (4) includes a spring shell (41), a movable groove (42) is provided on the inner side of the spring shell (41), a first spring (43) is fixedly connected to one side of the movable groove (42) of the spring shell (41), and a first sliding opening (44) is provided at the end of the spring shell (41) away from the first spring (43). The second sliding port (45) includes an external post (51), an internal post block (52) is fixedly connected to one side of the external post (51), a first rubber ring (53) is fixedly connected to the inner side of the internal post block (52), an anti-rotation rod (54) is slidably connected to the inner side of the internal post block (52), an inner hollow plate (55) is fixedly connected to one side of the anti-rotation rod (54), a second spring (56) is fixedly connected to one side of the inner hollow plate (55), a rubber cone (57) is fixedly connected to one side of the second spring (56), a second rubber ring (58) is fixedly connected to the inner side of the internal post block (52), and an external through hole (59) is opened on the inner side of the external post (51) near the rubber cone (57).

2. The motor carbon brush mounting structure according to claim 1, characterized in that: The brush grip assembly (2) includes a frame shell (21), a block groove (22) is provided at the upper end of the frame shell (21), a positioning groove (23) is provided at one end of the frame shell (21), an internal thread block (24) is fixedly connected to the inner side of the block groove (22) of the frame shell (21) by bolts, a locking post (25) is fixedly connected to the bottom end of the internal thread block (24), and ear seats are fixed on both sides of the frame shell (21). The ear seats of the frame shell (21) are fixed to the mounting support (1) by bolts.

3. The motor carbon brush mounting structure according to claim 2, characterized in that: The inner side of the frame shell (21) is hollow. The positioning groove (23) passes through one end of the frame shell (21). The lower end of the block groove (22) is connected to the positioning groove (23). The locking post (25) is inserted into the lower end of the block groove (22). The internal thread block (24) is rectangular. The outer side of the internal thread block (24) is in contact with the inner side of the upper end of the block groove (22).

4. The motor carbon brush mounting structure according to claim 2, characterized in that: The electrical contact block (31) is embedded in the inner side of the positioning groove (23), and the locking pin (25) is inserted into the positioning locking hole (33) opened in the electrical contact block (31). The number of positioning locking holes (33) is the same as the number of locking pins (25). The outer side of the carbon brush body (35) is fitted with the inner side of the frame shell (21) with a clearance.

5. The motor carbon brush mounting structure according to claim 1, characterized in that: One side of the spring shell (41) is fixedly connected to one side of the electrical contact block (31). The spring shell (41) is a hollow cylinder. The movable groove (42) passes through one end of the spring shell (41). The movable groove (42) is a cylinder with two ends. The second sliding opening (45) is distributed at the upper and lower ends of the first sliding opening (44). Both the first sliding opening (44) and the second sliding opening (45) pass through one end of the spring shell (41).

6. The motor carbon brush mounting structure according to claim 1, characterized in that: The inner side of the movable column groove (42) of the spring shell (41) fits against the outer side of the built-in column block (52). The inner side of the inner hollow plate (55) is hollow. The first spring (43) is embedded in the inner side of the inner hollow plate (55). One end of the first spring (43) is fixedly connected to one side of the built-in column block (52). The outer side of the external column (51) slides inside the first sliding opening (44) of the spring shell (41). The diameter of the external column (51) is 0.9 times the diameter of the first sliding opening (44). The inner side of the second sliding opening (45) of the spring shell (41) is slidably connected to an anti-rotation rod (54).

7. The motor carbon brush mounting structure according to claim 1, characterized in that: The external post (51) is cylindrical in shape. The inner side of the internal post block (52) near the anti-rotation rod (54) has a cylindrical through hole. The second rubber ring (58) is fixed inside the cylindrical through hole of the internal post block (52). The inner side of the second rubber ring (58) is in contact with the outer side of the anti-rotation rod (54). The end of the second spring (56) away from the inner hollow plate (55) is fixedly connected to the internal post block (52). The rubber cone (57) is conical in shape. The outer side of the rubber cone (57) is in contact with the inner side of the external through hole (59) of the external post (51).

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