Novel carbon brush holder with quick release carbon brush
Patent Information
- Application Number
- CN202522536630.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-28
AI Technical Summary
[0003]在电机运行系统中，碳刷作为连接静止电路与旋转换向器或集电环的关键导电部件，长期工作后不可避免地发生磨损，需定期检查与更换，传统碳刷架多采用螺钉压板、弹簧卡扣或整体封闭式结构固定碳刷，更换时往往需要拆卸多个紧固件、取出压缩弹簧，操作繁琐、耗时长，且易因装配不到位导致接触不良或振动松动，影响电机运行稳定性
该快速装卸碳刷的新型碳刷架，操作人员仅需握住矩形板外侧的拉杆，向外同步施加拉力，该拉力通过侧边支架传递至环形槽，使两侧的挤压组件沿滑动槽向外滑动，从而克服弹力带的弹性张力，使矩形板脱离对碳刷的夹持区域，此时碳刷失去侧向约束，可轻松从滑套支架前端或后端直接抽出，更换新碳刷后，将其重新插入滑套支架至预定位置，随后松开拉杆，在弹力带的回缩力作用下，两侧的挤压组件自动沿滑动槽向内复位，矩形板再次贴合碳刷两侧，并通过端面的减震垫实现柔性压紧，该过程不仅完成快速定位，还通过弹力带提供恒定夹持力，确保碳刷在后续运行中稳定接触换向器，整个装卸过程无需工具、无需断电拆解整机，仅需数秒即可完成，显著提升维护效率。
Smart Images
Figure CN224923155U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of carbon brush holder technology, specifically a novel carbon brush holder for quick loading and unloading of carbon brushes. Background Technology
[0002] A carbon brush holder is an electrical connection device typically used to transfer current from an electric motor to the carbon brushes on the rotor. A carbon brush is a conductive component used to carry current and is commonly found in DC motors. The main function of the carbon brush holder structure is to stabilize the position of the carbon brushes and provide a reliable electrical connection. Carbon brush holders are usually made of metal and have slots or grooves to hold the carbon brushes in place. They are typically fixed to the stator of the motor and held in contact with the rotor by mechanisms such as springs. When the motor runs, the rotation of the rotor generates friction, creating electrical contact between the carbon brushes and the brush holder. Simultaneously, the brush holder transfers current to the carbon brushes via connecting wires, thus supplying power to the rotor.
[0003] In motor operating systems, carbon brushes are key conductive components that connect stationary circuits to rotary commutators or slip rings. After long-term operation, they inevitably wear out and need to be inspected and replaced regularly. Traditional carbon brush holders often use screw plates, spring clips, or an overall enclosed structure to fix the carbon brushes. When replacing them, it is often necessary to remove multiple fasteners and take out the compression springs. The operation is cumbersome and time-consuming. Furthermore, improper assembly can easily lead to poor contact or vibration loosening, affecting the stability of motor operation.
[0004] Therefore, we propose a new type of carbon brush holder for quick loading and unloading of carbon brushes. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a novel carbon brush holder for quick loading and unloading of carbon brushes, which can effectively solve the problems in the background technology.
[0006] To achieve the above objectives, this utility model provides the following technical solution: To achieve the above objectives, the technical solution adopted by this utility model is as follows: a novel carbon brush holder for quick loading and unloading of carbon brushes, comprising a connecting base, a plurality of sliding sleeve brackets being provided on the top of the connecting base, the sliding sleeve brackets being used to accommodate carbon brushes, a fixed bracket being fixedly connected to the outer surface of the sliding sleeve brackets, the fixed brackets being fixedly connected to the connecting base, sliding grooves being respectively provided at both ends of the fixed brackets and the sliding sleeve brackets, and extrusion components being provided on the inner walls of the sliding sleeve brackets and the sliding grooves, with elastic members being provided between adjacent extrusion components.
[0007] Furthermore, the extrusion assembly includes a rectangular plate, the outer wall of which is fitted against the inner wall of the sliding sleeve bracket, and connecting members are fixedly connected to both ends of the rectangular plate, the connecting members being fitted against the inner wall of the sliding groove.
[0008] Furthermore, a tie rod is fixedly connected to the outer surface of the rectangular plate, and a shock-absorbing pad is fixedly connected to one end of the rectangular plate near the carbon brush.
[0009] Furthermore, the connector includes a side bracket, which is fixedly connected to the side wall of the rectangular plate. An annular groove is provided through both ends of one side of the side bracket, and a protective bracket is fixedly connected to the outside of the annular groove.
[0010] Furthermore, the elastic element includes an elastic band, which is disposed in an annular groove of an adjacent side support.
[0011] Furthermore, a connecting wire is provided on one side of the carbon brush, and the connecting wire is located inside the elastic band.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: Compared with the prior art, this utility model provides a novel carbon brush holder for quick loading and unloading of carbon brushes, which has the following beneficial effects: This new type of carbon brush holder allows for quick carbon brush installation and removal. Operators simply need to grasp the pull rod on the outside of the rectangular plate and apply a pulling force outwards. This force is transmitted to the annular groove through the side bracket, causing the pressing components on both sides to slide outwards along the sliding groove. This overcomes the elastic tension of the elastic band, allowing the rectangular plate to disengage from the carbon brush clamping area. At this point, the carbon brush loses lateral restraint and can be easily pulled out directly from the front or rear end of the sliding sleeve bracket. After replacing the carbon brush, it is reinserted into the sliding sleeve bracket to the predetermined position. Then, the pull rod is released, and under the recoil force of the elastic band, the pressing components on both sides automatically reset inwards along the sliding groove. The rectangular plate then re-fits the carbon brush on both sides, and the end-face damping pads achieve flexible clamping. This process not only achieves rapid positioning but also provides a constant clamping force through the elastic band, ensuring stable contact between the carbon brush and the commutator during subsequent operation. The entire installation and removal process requires no tools and no power interruption or disassembly of the entire machine, taking only a few seconds, significantly improving maintenance efficiency. Attached Figure Description
[0013] Figure 1 A schematic diagram of the overall structure of the novel carbon brush holder for quick loading and unloading of carbon brushes provided by this utility model; Figure 2 A schematic diagram of the state structure of the novel carbon brush holder for quick loading and unloading of carbon brushes provided by this utility model; Figure 3 A schematic diagram showing the disassembled structure of the sliding sleeve bracket and the extrusion assembly provided by this utility model.
[0014] The following are labeled in the diagram: 1. Connecting base; 2. Sliding sleeve bracket; 3. Fixed bracket; 4. Sliding groove; 5. Rectangular plate; 6. Pull rod; 7. Shock-absorbing pad; 8. Side bracket; 9. Annular groove; 10. Protective bracket; 11. Elastic band; 12. Carbon brush; 13. Connecting wire. Detailed Implementation
[0015] To make the technical means, creative features, and achieved objectives and effects of this utility model readily understandable, the present utility model will be further described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0016] To address the shortcomings of existing technologies, such as Figure 1-3 As shown, this utility model provides a novel carbon brush 12 holder for quick loading and unloading of carbon brushes 12. The specific implementation includes a connecting base 1 with an integral plate-like structure, which is used to fix and connect to the motor end cover or bracket by bolts or buckles. On the top of the connecting base 1, multiple sliding sleeve brackets 2 are arranged at intervals along the axial or circumferential direction. Each sliding sleeve bracket 2 is a hollow square tube structure, and its interior forms a sliding chamber for accommodating the carbon brush 12. The carbon brush 12 can slide freely along the axial direction of the sliding sleeve bracket 2 and always presses against the surface of the motor commutator or slip ring under the action of elasticity to achieve stable current conduction.
[0017] To enhance the structural rigidity of the sliding sleeve bracket 2 and achieve a reliable connection with the connecting base 1, a fixed bracket 3 is fixedly connected to the outer surface of the sliding sleeve bracket 2. The fixed bracket 3 is U-shaped, with one end welded, riveted or integrally formed to the outer wall of the sliding sleeve bracket 2, and the other end firmly connected to the connecting base 1 by screws, pins or embedded structures, to ensure that the overall assembly does not shift or loosen under motor vibration.
[0018] At both ends of the fixed bracket 3 and the sliding sleeve bracket 2, there are mutually aligned sliding grooves 4. The sliding grooves 4 extend radially or laterally along the sliding sleeve bracket 2 to form a motion guide channel for the extrusion assembly. In the space enclosed by the inner wall of the sliding sleeve bracket 2 and the sliding grooves 4, an extrusion assembly is provided to clamp the carbon brush 12 from both sides to prevent it from shaking or falling off during operation. An elastic element is provided between two adjacent extrusion assemblies to provide continuous clamping force.
[0019] When it is necessary to replace carbon brush 12, the operator manually pulls the extrusion assembly to make it move outward against the tension of the elastic element, thereby detaching it from the clamping state of carbon brush 12. At this time, carbon brush 12 loses lateral restraint and can be easily pulled out from the front or rear end of the sliding sleeve bracket 2. After replacing the new carbon brush 12, carbon brush 12 is inserted back into the sliding sleeve bracket 2, the extrusion assembly is released, the elastic element automatically retracts, driving the extrusion assembly to reset and re-tighten the carbon brush 12, completing the quick filling.
[0020] The extrusion assembly includes a rectangular plate 5, the outline of which matches the cross-section of the inner cavity of the sliding sleeve bracket 2. The outer side wall is tightly fitted with the inner wall of the sliding sleeve bracket 2 to ensure that the clamping surface is flat and the force is uniform. Connectors are fixedly connected to both ends of the rectangular plate 5. The connectors pass through the openings on the side wall of the sliding sleeve bracket 2 and slide in cooperation with the inner wall of the sliding groove 4 to guide and limit, preventing the rectangular plate 5 from deflecting or getting stuck during the clamping process.
[0021] To further enhance the human-machine interface experience, a pull rod 6 is fixedly connected to the outer surface of the rectangular plate 5. The pull rod 6 protrudes outward, making it easy for fingers to grip or tools to hook and pull. At the same time, a shock-absorbing pad 7 is fixedly connected to one end of the rectangular plate 5 near the carbon brush 12. The shock-absorbing pad 7 is made of silicone, polyurethane or elastic rubber material, which can not only buffer the impact vibration of the carbon brush 12 during operation, but also avoid the risk of wear or arcing caused by direct metal contact with the carbon brush 12.
[0022] The connector specifically includes a side bracket 8, one end of which is welded to or integrally formed with the side wall of the rectangular plate 5, and the other end extends laterally into the sliding groove 4. At both ends of one side of the side bracket 8, annular grooves 9 are provided through. The annular groove 9 is a semi-closed circular groove used to accommodate the elastic component. A protective bracket 10 is also fixedly connected to the outside of the annular groove 9. The bracket is in the shape of an arc-shaped cover, covering the outer perimeter of the annular groove 9 to protect the elastic component.
[0023] The elastic component is preferably an elastic band 11, made of highly elastic rubber, silicone or thermoplastic polyurethane, which has excellent fatigue resistance and long-term resilience. The elastic band 11 is arranged around the annular groove 9 of the two adjacent side supports 8 to form a closed-loop tensioning structure. When the extrusion components on both sides are stretched, the elastic band 11 is stretched and stores energy. After release, it drives the extrusion components to reset by its own elastic contraction force, thereby achieving automatic clamping.
[0024] In addition, to ensure the electrical connection is safe and reliable, a connecting wire 13 is provided on one side of the carbon brush 12. The connecting wire 13 is a braided copper wire or a flexible conductor, which is used to lead the current to the external circuit. During installation, the connecting wire 13 is arranged inside the elastic band 11, that is, on the side close to the center of the carbon brush 12, to prevent the elastic band 11 from rubbing or pulling the connecting wire 13 during the extension and contraction process.
[0025] The working principle of the carbon brush holder for quick loading and unloading carbon brush 12 is as follows: When the carbon brush 12 needs to be replaced due to long-term wear, the operator only needs to hold the pull rod 6 on the outside of the rectangular plate 5 and apply a pulling force outward simultaneously. This pulling force is transmitted to the annular groove 9 through the side bracket 8, causing the pressing components on both sides to slide outward along the sliding groove 4, thereby overcoming the elastic tension of the elastic band 11 and causing the rectangular plate 5 to be released from the clamping area of the carbon brush 12. At this time, the carbon brush 12 loses its lateral constraint and can be easily pulled out directly from the front or rear end of the sliding sleeve bracket 2 without disassembling screws, springs or other auxiliary parts. After replacing the carbon brush 12, reinsert it into the sliding sleeve bracket 2 to the predetermined position. Then, release the pull rod 6. Under the retraction force of the elastic band 11, the pressing components on both sides automatically reset inward along the sliding groove 4. The rectangular plate 5 once again fits against both sides of the carbon brush 12 and achieves flexible clamping through the shock-absorbing pad 7 on the end face. This process not only completes rapid positioning but also provides a constant clamping force through the elastic band 11, ensuring that the carbon brush 12 stably contacts the commutator during subsequent operation.
[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A novel carbon brush holder for quick loading and unloading of carbon brushes, characterized in that: The system includes a connecting base (1), the top of which is provided with multiple sliding brackets (2), the sliding brackets (2) are used to accommodate carbon brushes (12), the outer surface of the sliding brackets (2) is fixedly connected with a fixed bracket (3), the fixed brackets (3) are fixedly connected to the connecting base (1), the fixed brackets (3) and the two ends of the sliding brackets (2) are respectively provided with sliding grooves (4), the inner walls of the sliding brackets (2) and the sliding grooves (4) are provided with extrusion components, and elastic members are provided between adjacent extrusion components.
2. The novel carbon brush holder for quick loading and unloading of carbon brushes according to claim 1, characterized in that: The extrusion assembly includes a rectangular plate (5), the outer wall of which is in contact with the inner wall of the sliding sleeve bracket (2), and connecting pieces are fixedly connected to both ends of the rectangular plate (5), and the connecting pieces are in contact with the inner wall of the sliding groove (4).
3. The novel carbon brush holder for quick loading and unloading of carbon brushes according to claim 2, characterized in that: A pull rod (6) is fixedly connected to the outer surface of the rectangular plate (5), and a shock-absorbing pad (7) is fixedly connected to one end of the rectangular plate (5) near the carbon brush (12).
4. The novel carbon brush holder for quick loading and unloading of carbon brushes according to claim 3, characterized in that: The connector includes a side bracket (8), which is fixedly connected to the side wall of the rectangular plate (5). An annular groove (9) is provided through both ends of one side of the side bracket (8), and a protective bracket (10) is fixedly connected to the outside of the annular groove (9).
5. The novel carbon brush holder for quick loading and unloading of carbon brushes according to claim 4, characterized in that: The elastic element includes an elastic band (11), which is disposed in the annular groove (9) of the adjacent side support (8).
6. The novel carbon brush holder for quick loading and unloading of carbon brushes according to claim 5, characterized in that: A connecting line (13) is provided on one side of the carbon brush (12), and the connecting line (13) is located inside the elastic band (11).