Carbon brush holder assembly capable of preventing carbon brush from falling off

Abstract

The utility model discloses a carbon brush holder assembly capable of preventing a carbon brush from falling off, which relates to the technical field of carbon brush holders and comprises a brush holder body, the brush holder body is of a circular cover structure, a plurality of groups of limiting frames are circumferentially arranged at the top of the brush holder body at equal intervals, and carbon brush assemblies are movably arranged in the limiting frames. The middle part of the brush carrier body is provided with a receding hole used for accommodating a motor commutator. The rotatable hollow pipe is arranged in the middle of the brush carrier body through the adjusting mechanism, the pushing piece is arranged at the top of the outer side of the hollow pipe, the adjusting mechanism is used for driving the hollow pipe to rotate, then the multiple sets of carbon brush assemblies are pushed to move synchronously, and it can be guaranteed that the positions of the multiple sets of metal plates change synchronously in the adjusting process; and the consistency of position adjustment of multiple groups of metal plates is effectively ensured, so that the consistency of the positions of the carbon brushes is accurately controlled, and a more reliable guarantee is provided for stable operation of the motor.

Description

Technical Field

[0001] This utility model relates to the field of carbon brush holder technology, and in particular to a carbon brush holder assembly that can prevent carbon brushes from falling off. Background Technology

[0002] During motor operation, carbon brushes, as key conductive components, are crucial for stable motor operation due to their good contact with the motor commutator. The main function of the carbon brush holder assembly is to fix the carbon brushes and ensure that they maintain a stable position and pressure during contact with the commutator, preventing the carbon brushes from falling off and thus ensuring the continuous and reliable operation of the motor. Currently, there are various types of carbon brush holder assemblies on the market. Among them, CN219802027U discloses a carbon brush holder with adjustable baffle position. This carbon brush holder attempts to adjust the position of the carbon brushes by setting adjustable baffles to meet the requirements of carbon brush position under different operating conditions.

[0003] However, this type of brush holder has significant shortcomings in practical applications. Its adjustment method requires independent operation of each baffle, meaning that when adjusting the position of multiple sets of carbon brushes, each baffle needs to be adjusted individually. Due to unavoidable errors in manual operation, the adjustment range and precision of different baffles are difficult to maintain completely consistently. This results in the carbon brushes not achieving an ideal, consistent position after adjustment. Uneven contact pressure between the carbon brushes in different positions and the commutator can cause some brushes to wear faster due to excessive contact pressure, shortening their lifespan. This not only affects motor performance but may also damage the commutator surface. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a carbon brush holder assembly that can prevent carbon brushes from falling off, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a carbon brush holder assembly that prevents carbon brushes from falling off, comprising a brush holder body, the brush holder body being configured as a circular cover structure, the top of the brush holder body having multiple sets of limiting frames equidistantly arranged around its circumference, carbon brush assemblies being movably arranged within the limiting frames, a clearance hole for accommodating a motor commutator being provided in the middle of the brush holder body, a hollow tube rotatably arranged in the middle of the inner side of the brush holder body and located around the clearance hole, a pushing member for synchronously moving multiple sets of carbon brush assemblies being provided at the top of the outer side of the hollow tube, and an adjustment mechanism for driving its rotation being provided in the middle of the hollow tube.

[0006] As a further technical solution of this utility model, the carbon brush assembly includes a metal plate, a spring, a wire, and a carbon brush. The metal plate is slidably disposed at one end of the inner side of the limiting frame, and the carbon brush is slidably passed through the other end of the limiting frame away from the metal plate. The carbon brush and the metal plate are electrically connected by a wire, and a spring is coaxially disposed outside the wire.

[0007] As a further technical solution of this utility model, the pushing component includes a rotating disk and a connecting pin. The rotating disk is connected to the top of the outer side of the hollow tube. Multiple sets of oblique slots are equidistantly opened on the rotating disk. A connecting pin is vertically arranged at the bottom of the metal plate. The bottom end of the connecting pin extends to the inner side of the corresponding oblique slot.

[0008] As a further technical solution of this utility model, the top of the brush holder body and the bottom of the limiting frame are both provided with guide slots for the movement of the connecting pin.

[0009] As a further technical solution of this utility model, the adjustment mechanism includes a worm gear, a worm, and a handle. The worm gear is connected to the middle of the outer side of the hollow tube, and the worm is rotatably arranged on the inner side of the brush holder body. The worm is meshed with the worm gear, and one end of the worm passes through the brush holder body and is connected to the handle.

[0010] As a further technical solution of this utility model, the metal plate is connected to a lead wire on the side away from the spring, and one end of the lead wire passes through the limiting frame and is electrically connected to the external device.

[0011] This invention provides a carbon brush holder assembly that prevents carbon brushes from falling off. Compared with the prior art, it has the following advantages: A rotatable hollow tube is set in the middle of the brush holder body through an adjustment mechanism, and a pushing member is set on the top of the outer side of the hollow tube. The adjustment mechanism drives the hollow tube to rotate, thereby driving multiple sets of carbon brush assemblies to move synchronously. This ensures that the positions of multiple sets of metal plates change synchronously during the adjustment process, effectively guaranteeing the consistency of the adjustment of the positions of multiple sets of metal plates, thereby precisely controlling the consistency of the carbon brush position. This not only avoids various problems caused by inconsistent carbon brush positions, but also greatly simplifies the adjustment process, improves adjustment efficiency and ease of operation, and better meets the precise requirements of the motor for carbon brush position under different operating conditions, providing a more reliable guarantee for the stable operation of the motor. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of a carbon brush holder assembly that can prevent carbon brushes from falling off.

[0013] Figure 2 A schematic diagram of the top section of a limiting frame structure for a carbon brush holder assembly that can prevent carbon brushes from falling off.

[0014] Figure 3A schematic diagram of a partial structure of a carbon brush holder assembly that can prevent carbon brushes from falling off.

[0015] Figure 4 A side sectional view of a limiting frame structure for a carbon brush holder assembly that can prevent carbon brushes from falling off.

[0016] Figure 5 This is a side cross-sectional view of a brush holder assembly that prevents carbon brushes from falling off.

[0017] In the diagram: 1. Brush holder body; 11. Clearance hole; 2. Limiting bracket; 3. Carbon brush assembly; 31. Metal plate; 32. Spring; 33. Wire; 34. Carbon brush; 4. Hollow tube; 5. Pushing component; 51. Rotating disk; 511. Angled groove; 52. Connecting pin; 6. Adjusting mechanism; 61. Worm gear; 62. Worm; 63. Handle; 7. Guide groove; 8. Lead wire. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5 This utility model provides a technical solution for a carbon brush holder assembly that can prevent carbon brushes from falling off: A carbon brush holder assembly that can prevent carbon brushes from falling off includes a brush holder body 1, which is configured as a circular cover structure. Multiple sets of limiting frames 2 are equidistantly arranged on the top of the brush holder body 1. Carbon brush assemblies 3 are movably arranged inside the limiting frames 2. A clearance hole 11 for accommodating a motor commutator is opened in the middle of the brush holder body 1. A hollow tube 4 located outside the clearance hole 11 is rotatably arranged in the middle of the inner side of the brush holder body 1. A pushing member 5 for pushing the multiple sets of carbon brush assemblies 3 to move synchronously is arranged on the top of the outer side of the hollow tube 4. An adjustment mechanism 6 for driving its rotation is arranged in the middle of the hollow tube 4.

[0020] like Figure 2 and Figure 4 As shown, the carbon brush assembly 3 includes a metal plate 31, a spring 32, a wire 33 and a carbon brush 34. The metal plate 31 is slidably disposed at one end of the inner side of the limiting frame 2, and the carbon brush 34 is slidably passed through the end of the limiting frame 2 away from the metal plate 31. The carbon brush 34 and the metal plate 31 are electrically connected by a wire 33, and the spring 32 is coaxially disposed outside the wire 33.

[0021] Specifically, the metal plate 31 provides a mounting base for each component and allows for movement; the spring 32 ensures that the carbon brush 34 fits tightly against the commutator to guarantee conductivity; the wire 33 stably conducts current; and the carbon brush 34 directly contacts the commutator to conduct current, all of which together ensure the stable operation of the carbon brush 34.

[0022] like Figure 3 and Figure 5 As shown, the pusher 5 includes a rotating disk 51 and a connecting pin 52. The rotating disk 51 is connected to the top of the outer side of the hollow tube 4. Multiple sets of oblique slots 511 are equidistantly arranged on the rotating disk 51. The connecting pin 52 is vertically arranged at the bottom of the metal plate 31. The bottom end of the connecting pin 52 extends to the inner side of the corresponding oblique slot 511.

[0023] Specifically, the rotating disk 51 rotates with the hollow tube 4, and its inclined slot 511, through cooperation with the connecting pin 52, pushes the metal plate 31 to drive multiple sets of carbon brush assemblies 3 to move radially in sync, thereby adjusting the contact position between the carbon brush 34 and the commutator, and indirectly ensuring that the contact pressure between the carbon brush 34 and the commutator is uniform.

[0024] like Figure 3 and Figure 4 As shown, the top of the brush holder body 1 and the bottom of the limiting frame 2 are both provided with guide slots 7 for the movement of the connecting pin 52.

[0025] Specifically, the guide slot 7 provides precise guidance for the radial movement of the connecting pin 52, ensuring stable and accurate movement of the carbon brush assembly 3 and preventing the carbon brush 34 from loosening and falling off due to lateral shaking.

[0026] like Figure 5 As shown, the adjustment mechanism 6 includes a worm gear 61, a worm 62, and a handle 63. The worm gear 61 is connected to the middle of the outer side of the hollow tube 4. The worm 62 is rotatably arranged on the inner side of the brush holder body 1. The worm 62 is meshed with the worm gear 61. One end of the worm 62 passes through the brush holder body 1 and is connected to the handle 63.

[0027] Specifically, by rotating the handle 63, the worm 62 is driven to rotate. The worm 62 meshes with the worm wheel 61, causing the hollow tube 4 to rotate. The self-locking characteristics of the worm wheel 61 and the worm 62 can keep the hollow tube 4 stable after adjustment, preventing unexpected changes in the position of the carbon brush 34 under external force.

[0028] like Figure 4 As shown, a lead wire 8 is connected to the side of the metal plate 31 away from the spring 32. One end of the lead wire 8 passes through the limit frame 2 and is electrically connected to the external device.

[0029] Specifically, lead 8 ensures stable current conduction to external devices, maintaining normal motor operation.

[0030] The working principle of this utility model is as follows: When working, by rotating the handle 63, the worm 62 connected to it is driven to rotate. Since the worm 62 meshes with the worm wheel 61 on the hollow tube 4, it drives the hollow tube 4 to rotate. When the hollow tube 4 rotates, the rotating disk 51 connected to its top rotates synchronously. The circumferentially distributed oblique slots 511 on the rotating disk 51 cooperate with the connecting pins 52 extending to its inner side. Under the precise guidance of the guide slots 7 of the brush holder body 1 and the limiting frame 2, the connecting pins 52 are pushed to drive the metal plate 31 to slide within the limiting frame 2, thereby realizing the synchronous radial movement of multiple carbon brush assemblies 3 toward or away from the motor commutator. During the movement of the carbon brush assembly 3, the spring 32 always applies pressure to the carbon brush 34 in the direction of the commutator, so that the carbon brush 34 fits tightly against the commutator, ensuring good conductive contact and buffering vibration. At the same time, the lead wire 8 connected to the side of the metal plate 31 away from the spring 32 passes through the limiting frame 2 and is electrically connected to the external device, continuously and stably conducting current to ensure the normal operation of the motor. The entire structure works together to effectively prevent the carbon brush 34 from falling off.

[0031] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A carbon brush holder assembly for preventing carbon brushes from falling off, characterized in that, Includes a brush holder body (1), the brush holder body (1) is configured as a circular cover structure, the top of the brush holder body (1) is provided with multiple sets of limiting frames (2) at equal intervals around the circumference, and a carbon brush assembly (3) is movably arranged inside the limiting frame (2). The brush holder body (1) has a clearance hole (11) in the middle for accommodating the motor commutator. The brush holder body (1) has a hollow tube (4) rotatably mounted on the inner side of the middle, which is located around the clearance hole (11). The top of the outer side of the hollow tube (4) is provided with a pusher (5) for pushing multiple carbon brush assemblies (3) to move synchronously. The middle of the hollow tube (4) is provided with an adjustment mechanism (6) for driving it to rotate.

2. A carbon brush holder assembly for preventing carbon brush detachment according to claim 1, characterized in that, The carbon brush assembly (3) includes a metal plate (31), a spring (32), a wire (33) and a carbon brush (34). The metal plate (31) is slidably disposed at one end of the inner side of the limiting frame (2), and the carbon brush (34) is slidably passed through the end of the limiting frame (2) away from the metal plate (31). The carbon brush (34) and the metal plate (31) are electrically connected by a wire (33), and a spring (32) is coaxially disposed outside the wire (33).

3. A carbon brush holder assembly for preventing carbon brush detachment according to claim 2, characterized in that, The pusher (5) includes a rotating disk (51) and a connecting pin (52). The rotating disk (51) is connected to the top of the outer side of the hollow tube (4). Multiple sets of oblique slots (511) are equidistantly arranged on the rotating disk (51). The connecting pin (52) is vertically arranged at the bottom of the metal plate (31). The bottom end of the connecting pin (52) extends to the inner side of the corresponding oblique slot (511).

4. A carbon brush holder assembly for preventing carbon brush detachment according to claim 3, characterized in that, The top of the brush holder body (1) and the bottom of the limiting frame (2) are both provided with guide slots (7) for the movement of the connecting pin (52).

5. A carbon brush holder assembly for preventing carbon brush detachment according to claim 3, characterized in that, The adjustment mechanism (6) includes a worm gear (61), a worm (62) and a handle (63). The worm gear (61) is connected to the middle of the outer side of the hollow tube (4). The worm (62) is rotatably provided on the inner side of the brush holder body (1). The worm (62) is meshed with the worm gear (61). One end of the worm (62) passes through the brush holder body (1) and is connected to the handle (63).

6. A carbon brush holder assembly for preventing carbon brush detachment according to claim 2, characterized in that, The metal plate (31) is connected to a lead wire (8) on the side away from the spring (32), and one end of the lead wire (8) passes through the limiting frame (2) and is electrically connected to an external device.

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