A new brush structure

Abstract

The utility model relates to motor brush technical field, and disclose a novel brush structure, including motor and mounting panel, the motor output fixedly installed with output shaft, the motor is close to the end cap of output shaft one end joint, the end cap is close to the fixed mounting of motor one end and has the mounting seat, the mounting panel is close to the one end screw thread connection of mounting seat and has the mounting bolt, the mounting panel is close to the fixed mounting of motor one end and has the sliding block, the mounting panel is connected with the limiting frame through the sliding block sliding, the limiting frame is close to the inside along and is equipped with the locating groove, the limiting frame is close to the inside along and is connected with the brush body sliding, the brush body is close to the fixed mounting of locating groove one end and has the spring. The novel brush structure, through spring one end fixed brush body, the other end connects the limiting frame, can provide the sustained elasticity for the brush, the elastic deformation of spring makes brush body always closely adhere to output shaft, when the brush wears, through spring force can also compensate the gap, ensure that the electric contact does not interrupt.

Description

Technical Field

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

[0002] Motor brushes are devices that transmit energy or signals between the stationary and rotating parts of rotating machinery such as electric motors or generators. Also known as carbon brushes, they are found inside DC motors in electric shavers, small kitchen appliances, electric bicycles, and are widely used in DC motors, automobile starters, industrial drive motors, and slip ring systems for wind turbines.

[0003] Its core function is to introduce external current into rotating components such as armature windings or to extract current generated by rotating components through sliding contact with the surface of rotating commutators or slip rings. It is a core component that ensures the continuity and stability of power transmission in equipment.

[0004] Chinese Utility Model Patent Publication No. CN208316476U discloses a wear-resistant commutating brush for a motor that is easy to install. The specification describes an insulating layer that effectively prevents discharge between the brush and the motor cover. A mounting base is used to install and fix the brush box, which houses the brush body. The brush body transmits signals, and a spring provides a forward force to keep the brush body in contact with the commutating ring. Ball bearings convert sliding friction into rolling friction, ensuring effective contact between the brush body and the commutating ring while reducing friction, decreasing motor energy consumption, and extending the brush body's lifespan. However, this easy-to-install commutating brush lacks a quick-installation structure. With prolonged use, the brush wears significantly, making quick brush replacement difficult and affecting the overall motor operation, resulting in poor practicality. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a novel brush structure, which can effectively solve the problem in the prior art that the brush is not designed with a quick installation structure, and when the brush is used for a long time, its wear is large, making it inconvenient for the staff to quickly replace the brush, affecting the normal use of the overall motor and resulting in poor practicality.

[0006] The technical solution adopted by this utility model is as follows: a novel brush structure, including a motor and a mounting plate. An output shaft is fixedly installed at the output end of the motor. An end cover is snapped onto the end of the motor near the output shaft. A mounting base is fixedly installed at the end of the end cover near the motor. A mounting bolt is threaded onto the end of the mounting plate near the mounting base. A slider is fixedly installed at the end of the mounting plate near the motor. A limit frame is slidably connected to the mounting plate via the slider. A positioning groove is provided along the inner edge of the limit frame. A brush body is slidably connected along the inner edge of the limit frame. A spring is fixedly installed at the end of the brush body near the positioning groove.

[0007] Preferably, a positioning seat is fixedly installed at the end of the end cover near the motor. The positioning seat has a slot at the end near the motor and a positioning hole through the end near the motor. The positioning seat and the positioning hole are provided in multiple identical quantities and are distributed in a ring around the end cover.

[0008] With the above technical solution, when installing the end cover, it can be aligned with the motor through the slot on the positioning seat, and then fasteners such as bolts can be passed through the positioning hole to achieve quick installation of the end cover and the motor, which facilitates quick replacement of the entire end cover and makes subsequent maintenance and replacement easier.

[0009] Preferably, the mounting base has a mounting groove along its inner edge, and the mounting bolt passes through the mounting plate and is threadedly connected to the mounting groove, with the mounting groove and the mounting bolt corresponding one-to-one.

[0010] With the above technical solution and the design of the mounting slot, when replacing the mounting plate and the upper brush body, the mounting plate can be placed on top of the mounting base, and then the mounting bolt can be passed through the mounting plate so that the mounting bolt is connected to the mounting slot, which can realize quick replacement and facilitate replacement.

[0011] Preferably, a through groove one is provided at the center of the end cover, and a through groove two is provided at the center of the mounting plate. The through groove one and the through groove two have the same diameter, and the output shaft passes through the through groove one and the through groove two and extends to the end of the end cover away from the motor.

[0012] With the above technical solution, by designing that the diameter of the through groove one of the end cover and the through groove two of the mounting plate are the same, and the output shaft passes through both and extends to the outside of the end cover, the normal use of the motor can be ensured when the end cover is installed on the outer edge of the motor, thereby ensuring the normal rotation of the output shaft.

[0013] Preferably, the limiting frame has a sliding groove at one end near the mounting plate, and the limiting frame is slidably connected to the slider through the sliding groove. The limiting frame is threadedly connected to a positioning bolt at the other end away from the mounting plate, and the positioning bolt passes through the limiting frame and extends to the inner edge of the mounting plate.

[0014] Through the above technical solution, by cooperating with the sliding groove and the slider, the sliding groove can be inserted into the slider when installing the limiting frame, so that displacement can be avoided when the limiting frame is installed with the mounting plate. Then, the design of the positioning bolt facilitates the quick installation of the limiting frame and the mounting plate.

[0015] Preferably, the other end of the spring away from the brush body is fixedly installed with the limiting frame, and a connecting wire is provided at one end of the brush body.

[0016] The above technical solution uses a spring to fix the brush body at one end and connects the other end to a limiting frame, which can provide continuous elastic force to the brush. The elastic deformation of the spring ensures that the brush body is always in close contact with the output shaft. When the brush wears, the spring force can also compensate for the gap, ensuring that the conductive contact is not interrupted.

[0017] Preferably, there are two identical limiting frames, brush bodies, and springs, and the two limiting frames, brush bodies, and springs are symmetrically distributed about the center line of the mounting plate.

[0018] The above technical solution ensures balanced force on both sides of the output shaft through symmetrical layout, avoiding uneven wear of the output shaft caused by excessive pressure on one side of the brush. Furthermore, the simultaneous operation of dual brushes can shunt the current and reduce the load on a single set of brushes.

[0019] Compared with the prior art, this utility model provides a novel brush structure, which has the following beneficial effects:

[0020] 1. This new type of brush structure can be aligned with the motor via the slot on the positioning seat, and then fasteners such as bolts can be passed through the positioning holes to achieve quick installation of the end cover and the motor. This facilitates quick replacement of the entire end cover and makes subsequent maintenance and replacement easier. When replacing the entire mounting plate, the sliding groove and the slider cooperate to prevent displacement of the limit frame during installation. Different parts can be selected for replacement according to the actual situation, preventing the brush from being worn down after long-term use and affecting its normal operation.

[0021] 2. This new type of brush structure uses a spring to fix the brush body at one end and connects the other end to a limiting frame, which can provide continuous elastic force to the brush. The elastic deformation of the spring ensures that the brush body is always in close contact with the output shaft. When the brush wears, the spring force can also compensate for the gap, ensuring that the conductive contact is not interrupted. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the end cap of this utility model. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the end cap of this utility model. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the disassembled end cap structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the disassembled structure of the mounting plate and limiting frame of this utility model. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of the disassembled structure of the mounting plate and limiting frame of this utility model. Figure 2 ;

[0028] Figure 7 This is a schematic diagram showing the disassembled structure of the limiting frame and the brush body of this utility model;

[0029] Figure 8 This is a schematic diagram of the cross-sectional structure of the limiting frame of this utility model.

[0030] The components are: 1. Motor; 2. Output shaft; 3. End cover; 4. Positioning seat; 5. Slot; 6. Positioning hole; 7. Through slot one; 8. Mounting seat; 9. Mounting slot; 10. Mounting bolt; 11. Mounting plate; 12. Through slot two; 13. Slider; 14. Limit frame; 15. Slide groove; 16. Positioning bolt; 17. Positioning slot; 18. Brush body; 19. Spring; 20. Connecting wire. Detailed Implementation

[0031] 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.

[0032] Example 1: As Figure 1-8 As shown, the present invention provides a novel brush structure, including a motor 1 and a mounting plate 11. An output shaft 2 is fixedly mounted on the output end of the motor 1. An end cover 3 is snapped onto the end of the motor 1 near the output shaft 2. A mounting base 8 is fixedly mounted on the end cover 3 near the motor 1. A mounting bolt 10 is threadedly connected to the end of the mounting plate 11 near the mounting base 8. A slider 13 is fixedly mounted on the end of the mounting plate 11 near the motor 1. A limit frame 14 is slidably connected to the mounting plate 11 through the slider 13. A positioning groove 17 is provided at the inner edge of the limit frame 14. A brush body 18 is slidably connected at the inner edge of the limit frame 14. A spring 19 is fixedly mounted on the end of the brush body 18 near the positioning groove 17.

[0033] Specifically, a positioning seat 4 is fixedly installed on the end of the end cover 3 near the motor 1. The end of the positioning seat 4 near the motor 1 has a slot 5 and a positioning hole 6. The positioning seat 4 and the positioning hole 6 are provided in multiple identical positions and are arranged in a ring around the end cover 3. The advantage is that when the end cover 3 is installed, it can be aligned with the motor 1 through the slot 5 on the positioning seat 4. Then, fasteners such as bolts can be passed through the positioning hole 6 to achieve quick installation of the end cover 3 and the motor 1. This facilitates quick replacement of the entire end cover 3 and makes subsequent maintenance and replacement easier.

[0034] Specifically, a mounting groove 9 is provided on the inner edge of the mounting base 8, and the mounting bolt 10 passes through the mounting plate 11 and is threadedly connected to the mounting groove 9. The mounting groove 9 and the mounting bolt 10 correspond one-to-one. The advantage is that, through the design of the mounting groove 9, when replacing the mounting plate 11 and the brush body 18 above it, the mounting plate 11 can be placed on top of the mounting base 8, and then the mounting bolt 10 can be passed through the mounting plate 11 so that the mounting bolt 10 is connected to the mounting groove 9, which can realize quick replacement and facilitate replacement.

[0035] Specifically, a through groove 7 is provided at the center of the end cover 3, and a through groove 12 is provided at the center of the mounting plate 11. The diameters of the through grooves 7 and 12 are the same. The output shaft 2 passes through the through grooves 7 and 12 and extends to the end of the end cover 3 away from the motor 1. The advantage is that by designing that the diameters of the through grooves 7 and 12 of the end cover 3 are the same as those of the through grooves 12 of the mounting plate 11, and that the output shaft 2 passes through both and extends to the outside of the end cover 3, the normal use of the end cover 3 is not affected when it is installed on the outer edge of the motor 1, thus ensuring the normal rotation of the output shaft 2.

[0036] Example 2: Figure 2-8 As shown, this is an improvement on the previous embodiment.

[0037] Specifically, the limiting frame 14 has a groove 15 at one end near the mounting plate 11. The limiting frame 14 is slidably connected to the slider 13 through the groove 15. The limiting frame 14 is threadedly connected to a positioning bolt 16 at the other end away from the mounting plate 11. The positioning bolt 16 passes through the limiting frame 14 and extends to the inner edge of the mounting plate 11. The advantage is that, through the cooperation of the groove 15 and the slider 13, when installing the limiting frame 14, the groove 15 can be inserted into the slider 13. This prevents displacement when the limiting frame 14 is installed with the mounting plate 11. Furthermore, the design of the positioning bolt 16 facilitates the quick installation of the limiting frame 14 and the mounting plate 11.

[0038] Specifically, the other end of the spring 19 away from the brush body 18 is fixedly installed with the limiting frame 14. One end of the brush body 18 is provided with a connecting wire 20. The advantage is that by fixing the brush body 18 with one end of the spring 19 and connecting the limiting frame 14 with the other end, a continuous elastic force can be provided to the brush. The elastic deformation of the spring 19 makes the brush body 18 always tightly fit the output shaft 2. When the brush wears, the force of the spring 19 can also compensate for the gap, ensuring that the conductive contact is not interrupted.

[0039] Specifically, two identical limit frames 14, brush bodies 18, and springs 19 are provided. The two limit frames 14, brush bodies 18, and springs 19 are symmetrically distributed about the center line of the mounting plate 11. The advantage is that the symmetrical layout makes the force on both sides of the output shaft 2 balanced, avoiding excessive pressure on one side of the brush and causing uneven wear of the output shaft 2. In addition, the simultaneous operation of the two brushes can shunt the current and reduce the load on a single set of brushes.

[0040] Working Principle: During use, when installing the end cover 3, it can be aligned with the motor 1 via the slot 5 on the positioning seat 4. Then, fasteners such as bolts pass through the positioning hole 6, allowing for quick installation of the end cover 3 and the motor 1. This facilitates rapid replacement of the entire end cover 3 and subsequent maintenance and replacement. Due to the design of the mounting slot 9, when replacing the mounting plate 11 and the upper brush body 18, the mounting plate 11 can be placed on top of the mounting seat 8. Then, the mounting bolt 10 passes through the mounting plate 11, connecting it to the mounting slot 9, enabling quick and easy replacement. The design of the through slot 7 of the end cover 3 and the through slot 12 of the mounting plate 11 having the same diameter, with the output shaft 2 passing through both and extending to the outside of the end cover 3, ensures that the end cover 3, when installed on the outer edge of the motor 1, does not affect its normal operation, thus guaranteeing the output shaft's stability. 2. During normal rotation, the sliding groove 15 and the slider 13 cooperate to allow the limit frame 14 to be inserted into the slider 13 during installation. This prevents displacement when the limit frame 14 is installed with the mounting plate 11. The positioning bolt 16 facilitates quick installation of the limit frame 14 and the mounting plate 11. One end of the spring 19 fixes the brush body 18, and the other end connects to the limit frame 14, providing continuous elastic force to the brush. The elastic deformation of the spring 19 ensures that the brush body 18 is always tightly fitted to the output shaft 2. When the brush wears, the force of the spring 19 can compensate for the gap, ensuring uninterrupted conductive contact. The symmetrical layout ensures that the force on both sides of the output shaft 2 is balanced, avoiding uneven wear of the output shaft 2 caused by excessive pressure on one side of the brush. Furthermore, the simultaneous operation of the two brushes can shunt the current, reducing the load on a single set of brushes.

[0041] 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.

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