Carbon brush for micro motor

Abstract

The utility model discloses a miniature motor carbon brush relates to motor carbon brush technical field, including end cover, the inside fixedly connected with commutator of end cover, one side of end cover is equipped with carbon brush mechanism, carbon brush mechanism includes carbon brush subassembly and stabilizing component, carbon brush subassembly and stabilizing component mutually cooperate and use, carbon brush subassembly includes carbon brush holder, carbon brush holder is fixedly connected in the outside of end cover in the circumferential array, the inside of carbon brush holder is equipped with the accommodation groove, the inside sliding connection of accommodation groove has installation shell, one end of installation shell is fixedly connected with carbon brush head. The utility model discloses a miniature motor carbon brush, greatly facilitates the replacement work of carbon brush head through the carbon brush mechanism set up, reduces the operation process, and the step is simple, avoids the influence of complicated operation step to the assembly accuracy of motor, and the structure is simple, and the practicality is stronger.

Description

Technical Field

[0001] This utility model relates to the field of carbon brush technology for motors, and in particular to a carbon brush for a micro motor. Background Technology

[0002] A miniature DC motor is a rotating electric motor whose output or input is DC power. Carbon brushes, also called electrical brushes, are sliding contact components widely used in many electrical devices. The main materials used for carbon brushes are graphite, polyester graphite, and metallic (including copper and silver) graphite. Carbon brushes are devices that transmit energy or signals between the stationary and rotating parts of electric motors, generators, or other rotating machinery.

[0003] Carbon brushes are a key component in micro motors, primarily used to conduct current between the rotating commutator and the stationary circuit, ensuring stable motor operation. Because carbon brushes continuously rub against the high-speed rotating commutator during operation, their material gradually wears down, making them consumable parts. With increased use, carbon brush wear leads to increased contact resistance, increased sparking, and can even affect motor performance and lifespan. Therefore, carbon brushes need to be inspected and replaced regularly to ensure the normal operation of the motor.

[0004] Based on the aforementioned technologies, the applicant believes that most micro motors currently use a fixed carbon brush structure. Although this structure is simple, replacing the carbon brush often requires disassembling the motor housing or other components, which is cumbersome and can easily affect the assembly accuracy of the motor. In response to the above problems, we have introduced a micro motor carbon brush. Utility Model Content

[0005] This utility model discloses a carbon brush for a micro motor, aiming to solve the technical problem that most micro motors use a fixed installation method for their carbon brush structure. Although this structure is simple, replacing the carbon brush often requires disassembling the motor housing or other components, which is cumbersome and can easily affect the assembly accuracy of the motor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A micro motor carbon brush includes an end cap, a commutator fixedly connected inside the end cap, and a carbon brush mechanism on one side of the end cap. The carbon brush mechanism includes a carbon brush assembly and a stabilizing assembly, which cooperate with each other. The carbon brush assembly includes a carbon brush holder, which is fixedly connected to the outside of the end cap in a circumferential array. The carbon brush holder has a mounting groove inside, and a mounting shell is slidably connected inside the mounting groove. A carbon brush head is fixedly connected to one end of the mounting shell. The carbon brush holder has a telescopic groove inside, and a sliding plate is slidably connected inside the telescopic groove. A stabilizing post is fixedly connected to the end of the mounting shell away from the carbon brush head. The stabilizing post and the sliding plate are fixedly connected. A spring is sleeved on the outside of the stabilizing post, and a limit groove is formed at the end of the stabilizing post away from the sliding plate.

[0008] The carbon brush mechanism greatly facilitates the replacement of carbon brush heads, reduces the operation process, simplifies the steps, and avoids the impact of cumbersome operation steps on the assembly accuracy of the motor. The structure is simple and highly practical.

[0009] In a preferred embodiment, the stabilizing component includes a mounting base fixedly connected to the outside of the carbon brush holder. The mounting base has a threaded rod internally threadedly connected to it, and a limiting block is rotatably connected to the bottom of the threaded rod. The limiting block has a slot on its outer side.

[0010] The stabilizing component's mounting base is fixedly connected to the carbon brush holder. The threaded rod adjusts the position of the limiting block via the thread, allowing the card slot to precisely engage with the limiting groove. This enables quick locking and unlocking of the carbon brush head, facilitating maintenance and replacement while ensuring stability during operation.

[0011] In a preferred embodiment, one end of the carbon brush holder is symmetrically provided with cross grooves, and cross slide bars are slidably connected inside both cross grooves, and both cross slide bars are fixedly connected to the mounting shell.

[0012] The symmetrically arranged cross grooves on the carbon brush holder work in conjunction with the cross slide bars on the mounting housing to keep the carbon brush head moving in a straight line during installation and removal, preventing misalignment and improving assembly accuracy and operational reliability.

[0013] In a preferred embodiment, an L-shaped fixing plate is symmetrically fixed to the outer side of the carbon brush holder, and screws are threaded into the inner side of the L-shaped fixing plate.

[0014] The L-shaped fixing plate on the outside of the carbon brush holder is fixed with screws, which makes the connection between the entire carbon brush mechanism and the end cap more secure, prevents loosening due to vibration, and improves the stability of the overall structure.

[0015] In a preferred embodiment, the size of the cross groove matches the size of the cross slide bar, and the cross groove and the cross slide bar are used in conjunction with each other.

[0016] The cross groove and cross strip are precisely matched in size, ensuring that the mounting housing will not wobble during sliding, further optimizing the alignment accuracy of the carbon brush head and reducing wear and spark generation.

[0017] In a preferred embodiment, a rotating block is fixedly connected to the top of the threaded rod, and a rubber pad for anti-slip is fixedly connected to the outer side of the rotating block.

[0018] The rotating block at the top of the threaded rod is equipped with an anti-slip rubber pad on the outside, which provides a good grip during manual adjustment, prevents slippage, and makes the installation and adjustment of carbon brushes more convenient.

[0019] The micro motor carbon brush provided by this utility model has the following advantages:

[0020] Firstly, the carbon brush mechanism greatly facilitates the replacement of carbon brush heads, reduces the operation process, simplifies the steps, and avoids the impact of cumbersome operation steps on the assembly accuracy of the motor. The structure is simple and highly practical.

[0021] Secondly, the symmetrically arranged cross-shaped grooves on the carbon brush holder work in conjunction with the cross-shaped slide bars on the mounting housing to ensure the carbon brush head maintains linear movement during installation and removal, preventing misalignment and improving assembly accuracy and operational reliability. The L-shaped fixing plate on the outer side of the carbon brush holder is secured with screws, making the connection between the entire carbon brush mechanism and the end cap more robust, preventing loosening due to vibration and enhancing the overall structural stability. The precise matching of the dimensions of the cross-shaped grooves and slide bars ensures the mounting housing does not wobble during sliding, further optimizing the alignment accuracy of the carbon brush head and reducing wear and sparking. The rotating block at the top of the threaded rod has an anti-slip rubber pad on its outer side, providing a good grip during manual adjustment and preventing slippage, making carbon brush installation and adjustment more convenient. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a micro motor carbon brush proposed in this utility model.

[0023] Figure 2 This is a three-dimensional schematic diagram of a micro motor carbon brush proposed in this utility model.

[0024] Figure 3 This is a three-dimensional rear view schematic diagram of a micro motor carbon brush proposed in this utility model.

[0025] Figure 4 This is a three-dimensional cross-sectional schematic diagram of a micro motor carbon brush proposed in this utility model.

[0026] Figure 5 This is a three-dimensional, thick schematic diagram of a carbon brush assembly for a micro motor carbon brush proposed in this utility model.

[0027] Figure 6 This utility model proposes a micro motor carbon brush. Figure 4 A magnified diagram of point A.

[0028] In the attached diagram: 1. End cap; 2. Commutator; 3. Brush holder; 4. Mounting slot; 5. Mounting housing; 6. Brush head; 7. Stabilizing column; 8. Spring; 9. Sliding plate; 10. Limiting slot; 11. Limiting block; 12. Slot; 13. Fixing base; 14. Threaded rod; 15. Rotating block; 16. Telescopic groove; 17. Cross slide groove; 18. Cross slide bar; 19. L-shaped fixing plate; 20. Screw. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] The micro motor carbon brush disclosed in this utility model is mainly used in the application scenarios of motor carbon brushes.

[0031] Reference Figures 1-6A micro motor carbon brush includes an end cover 1. A commutator 2 is fixedly connected inside the end cover 1. A carbon brush mechanism is provided on one side of the end cover 1. The carbon brush mechanism includes a carbon brush assembly and a stabilizing assembly. The carbon brush assembly and the stabilizing assembly cooperate with each other. The carbon brush assembly includes a carbon brush holder 3. The carbon brush holder 3 is fixedly connected to the outside of the end cover 1 in a circumferential array. A mounting groove 4 is opened inside the carbon brush holder 3. A mounting shell 5 is slidably connected inside the mounting groove 4. A carbon brush head 6 is fixedly connected to one end of the mounting shell 5. A telescopic groove 16 is opened inside the carbon brush holder 3. A sliding plate 9 is slidably connected inside the telescopic groove 16. A stabilizing post 7 is fixedly connected to the end of the mounting shell 5 away from the carbon brush head 6. The stabilizing post 7 and the sliding plate 9 are fixedly connected. A spring 8 is sleeved on the outside of the stabilizing post 7. A limit groove 10 is opened at the end of the stabilizing post 7 away from the sliding plate 9. The stabilizing component includes a mounting base 13, which is fixedly connected to the outside of the carbon brush holder 3. A threaded rod 14 is threadedly connected inside the mounting base 13. A limiting block 11 is rotatably connected to the bottom of the threaded rod 14. A slot 12 is provided on the outside of the limiting block 11.

[0032] In this embodiment, the commutator 2 rotates at high speed with the motor rotor, and the carbon brush head 6 maintains close contact with the surface of the commutator 2 under the elastic pressure of the spring 8, ensuring stable current conduction. When the carbon brush head 6 needs to be replaced due to long-term friction and wear, the operator only needs to rotate the rotating block 15 to drive the threaded rod 14 to rotate, so that the retaining block 11's slot 12 disengages from the retaining groove 10 of the stabilizing column 7. At this time, the mounting shell 5 can slide freely in the mounting groove 4. Guided by the precise fit between the cross slide bar 18 and the cross slide groove 17, the mounting shell 5, together with the carbon brush head 6, can be smoothly removed in a straight line. After replacing the new carbon brush head 6, the installation can be completed by reversing the operation. The carbon brush mechanism greatly facilitates the replacement of the carbon brush head 6, reduces the operation process, simplifies the steps, and avoids the impact of cumbersome operation steps on the assembly accuracy of the motor. The structure is simple and highly practical.

[0033] In the above technical solution, considering that most micro motors use a fixed carbon brush structure, although this structure is simple, replacing the carbon brush often requires disassembling the motor housing or other components, which is cumbersome and can easily affect the assembly accuracy of the motor. To solve this problem, the specific operation is as follows:

[0034] Reference Figures 1-6In a preferred embodiment, the carbon brush holder 3 has symmetrically formed cross-shaped grooves 17 at one end, and cross-shaped slide bars 18 are slidably connected inside each of the two cross-shaped grooves 17. Both cross-shaped slide bars 18 are fixedly connected to the mounting housing 5. An L-shaped fixing plate 19 is symmetrically fixedly connected to the outer side of the carbon brush holder 3, and a screw 20 is threaded inside the L-shaped fixing plate 19. The size of the cross-shaped grooves 17 matches the size of the cross-shaped slide bars 18, and the cross-shaped grooves 17 and cross-shaped slide bars 18 cooperate with each other. A rotating block 15 is fixedly connected to the top of the threaded rod 14, and a rubber pad for anti-slip is fixedly connected to the outer side of the rotating block 15.

[0035] In this embodiment, the symmetrically arranged cross grooves 17 on the carbon brush holder 3 cooperate with the cross slide bars 18 on the mounting housing 5 to maintain the linear movement of the carbon brush head 6 during installation and removal, preventing misalignment and improving assembly accuracy and operational reliability. The L-shaped fixing plate 19 on the outer side of the carbon brush holder 3 is fixed by screws 20, making the connection between the entire carbon brush mechanism and the end cap 1 more secure, preventing loosening due to vibration, and improving the overall structural stability. The precise matching of the dimensions of the cross grooves 17 and the cross slide bars 18 ensures that the mounting housing 5 will not wobble during sliding, further optimizing the alignment accuracy of the carbon brush head 6 and reducing wear and spark generation. The rotating block 15 at the top of the threaded rod 14 is provided with an anti-slip rubber pad on its outer side, providing a good grip during manual adjustment, preventing slippage, and making the installation and adjustment of the carbon brush more convenient.

[0036] Working Principle: During motor operation, the commutator 2 rotates at high speed with the motor rotor. Under the elastic pressure of the spring 8, the carbon brush head 6 maintains close contact with the surface of the commutator 2, ensuring stable current conduction. When the carbon brush head 6 needs to be replaced due to long-term friction and wear, the operator only needs to rotate the rotating block 15 to drive the threaded rod 14 to rotate, causing the retaining block 11's slot 12 to disengage from the stabilizing column 7's retaining groove 10. At this time, the mounting shell 5 can slide freely within the mounting groove 4. Guided by the precise fit between the cross slide bar 18 and the cross slide groove 17, the mounting shell 5, along with the carbon brush head 6, can be smoothly removed in a straight line. After replacing the new carbon brush head 6, the installation can be completed by reversing the operation. During this process, the spring 8 continuously provides stable contact pressure, the L-shaped fixing plate 19 ensures the secure installation of the entire carbon brush mechanism through the screws 20, and the adjustment function of the threaded rod 14 can precisely control the clamping force of the carbon brush head 6. This design not only enables rapid replacement of carbon brushes, but also ensures reliable contact between the carbon brushes and commutator 2 through multiple stabilizing structures, effectively reducing spark generation and abnormal wear, and significantly improving the working stability and service life of the motor.

[0037] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A carbon brush for a miniature motor, comprising an end cap (1), characterized in that: A commutator (2) is fixedly connected inside the end cap (1). A carbon brush mechanism is provided on one side of the end cap (1). The carbon brush mechanism includes a carbon brush assembly and a stabilizing assembly, which work together. The carbon brush assembly includes a carbon brush holder (3), which is fixedly connected to the outside of the end cap (1) in a circumferential array. The carbon brush holder (3) has a mounting groove (4) inside, and a mounting shell (5) is slidably connected inside the mounting groove (4). A carbon brush head (6) is fixedly connected to one end of the mounting shell (5). The carbon brush holder (3) has a telescopic groove (16) inside, and a sliding plate (9) is slidably connected inside the telescopic groove (16). A stabilizing column (7) is fixedly connected to the end of the mounting shell (5) away from the carbon brush head (6). The stabilizing column (7) and the sliding plate (9) are fixedly connected. A spring (8) is sleeved on the outside of the stabilizing column (7). A limiting groove (10) is opened at the end of the stabilizing column (7) away from the sliding plate (9).

2. The micro motor carbon brush according to claim 1, characterized in that: The stabilizing component includes a fixing seat (13), which is fixedly connected to the outside of the carbon brush holder (3). The fixing seat (13) is internally threaded with a threaded rod (14), and the bottom of the threaded rod (14) is rotatably connected to a limiting block (11). The limiting block (11) has a slot (12) on its outer side.

3. A micro motor carbon brush according to claim 1, characterized in that: The carbon brush holder (3) has symmetrically provided cross grooves (17) at one end, and cross slide bars (18) are slidably connected inside the two cross grooves (17). The two cross slide bars (18) are fixedly connected to the mounting shell (5).

4. A micro motor carbon brush according to claim 1, characterized in that: The carbon brush holder (3) is symmetrically fixed to an L-shaped fixing plate (19) on its outer side, and the L-shaped fixing plate (19) is internally threaded with screws (20).

5. A micro motor carbon brush according to claim 3, characterized in that: The size of the cross groove (17) matches the size of the cross slide bar (18), and the cross groove (17) and the cross slide bar (18) are used in conjunction with each other.

6. A micro motor carbon brush according to claim 2, characterized in that: A rotating block (15) is fixedly connected to the top of the threaded rod (14), and a rubber pad for anti-slip is fixedly connected to the outside of the rotating block (15).

Images