Low-sparking motor carbon brush
By using a modular design for motor carbon brushes and combining conductive and insulating materials, the stability problem of motor carbon brushes under vibration and wear is solved, thereby achieving stable motor operation and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUALIAN MECHANICAL & ELECTRICAL CO LTD
- Filing Date
- 2025-04-16
- Publication Date
- 2026-06-05
Smart Images
Figure CN224329038U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of low-sparking-characteristic motor carbon brush technology, and more particularly to low-sparking-characteristic motor carbon brushes. Background Technology
[0002] Motor carbon brushes are a general term for carbon brushes in electric motors and generators. They look a bit like erasers used to erase pencils, with wires leading out from the top, and they come in various sizes.
[0003] Motor carbon brushes are typically mounted on the rotor shaft of a motor, located between the stationary and rotating parts of the motor. Specifically, the carbon brushes are installed near the commutator or slip ring of the motor and make contact with the commutator or slip ring through spring pressure to transmit current.
[0004] Existing low-sparking motor carbon brushes are generally a single piece, lacking a buffer structure. Motor carbon brushes are consumable parts, and are easily damaged by long-term wear or vibration, which can affect stability. Furthermore, when damaged, the entire motor carbon brush needs to be replaced, increasing the long-term maintenance cost of the motor carbon brush.
[0005] Therefore, it is necessary to provide low-sparking motor carbon brushes to solve the above-mentioned technical problems. Utility Model Content
[0006] This invention provides a low-sparking motor carbon brush, which solves the problem that a single motor carbon brush is easily damaged by vibration or use, requiring complete replacement and increasing subsequent maintenance costs.
[0007] To solve the above-mentioned technical problems, the low-sparking characteristic motor carbon brush provided by this utility model includes: a carbon brush fixing bracket;
[0008] Multiple mounting buckles are installed at one end of the carbon brush holder. Each mounting buckle has an adjustment component installed inside via a limiting component. Each adjustment component has a mounting rail on one side. A first mounting strip is installed inside the mounting rail near one end via a fixing plate. A support block is installed on the other side of the first mounting strip. A connecting wire is installed on the top of the support block.
[0009] Multiple second mounting strips are installed inside multiple mounting rails near one end. Each second mounting strip has a fixing block installed on the other side. Each fixing block has a conductive block fixedly connected to its bottom. Each conductive block has a lubricating block fixedly connected to its bottom end. Two arc-shaped elastic plates are installed between the fixing block and the support block through two sets of fixing discs.
[0010] The support block, lubrication block, conductive block, and fixing block are all made of conductive materials, while the mounting strip and mounting clip are made of insulating materials. During motor operation, the lubrication block effectively reduces the friction coefficient between the carbon brush and the commutator, reducing frictional heat generation and thus lowering the possibility of spark generation. The conductive block uses high-purity, fine-grained graphite or graphite-based composite materials with added metal powders such as copper and silver to ensure good conductivity, promptly conduct current out, and reduce arcing caused by poor conductivity. The support block and fixing block use high-strength carbon fiber reinforced resin material to provide sufficient mechanical strength for the carbon brush as a whole, preventing the carbon brush from breaking or deforming under high-speed operation or large current impact, ensuring stable motor operation. The fixing plate and arc-shaped elastic sheet are both made of conductive materials.
[0011] Preferably, a protective spring is installed at the top of each of the support blocks, and heat dissipation holes are provided on both sides of the fixing block and the conductive block.
[0012] The heat dissipation holes penetrate through the fixing block and the conductive block, and the protective spring is sleeved on the outer surface of the connecting wire.
[0013] Preferably, a commutator is provided inside the carbon brush holder, and a rotating shaft is installed on the inner surface of the commutator.
[0014] Preferably, the adjustment component includes a movable block and two rows of fixing holes, with the two rows of fixing holes located on both sides of the movable block;
[0015] The movable block is inserted into the inside of the mounting buckle, and the fixing hole and the bolt are connected.
[0016] Preferably, the limiting component includes a retaining ring, an elastic component, and a locking bolt, wherein the elastic component is used to provide tension to the locking bolt;
[0017] The retaining ring uses an original elastic component, which is located on the outer surface of the retainer.
[0018] Preferably, the lubricating block can be made of a composite material containing molybdenum disulfide and graphite powder, and both the first mounting strip and the second mounting strip are T-shaped.
[0019] Compared with related technologies, the low-sparking characteristic motor carbon brush provided by this utility model has the following beneficial effects:
[0020] This invention provides a low-sparking-characteristic motor carbon brush. To increase the stability of the motor carbon brush and reduce the difficulty and cost of later maintenance, a conductive support block is first fixed to the top of the mounting rail on the front of the adjusting assembly via a first mounting strip and a fixing plate, preventing the first mounting strip from moving up and down inside the mounting rail. Then, a conductive fixing block and a conductive block with conductive lubrication are installed inside the mounting rail near the bottom via a second mounting strip, allowing the second mounting strip to move up and down inside the mounting rail. The conductive support block and fixing block are then connected by two arc-shaped elastic pieces to allow circuit flow. During use, the two arc-shaped elastic pieces filter out some vibrations, increasing stability. When the motor carbon brush needs to be replaced, simply loosen the connection between the two arc-shaped elastic pieces, then remove the second mounting strip from inside the mounting rail for replacement; the rest of the carbon brush does not need to be replaced. This design increases the stability of the low-sparking-characteristic motor carbon brush, and the use of a quick-installation mounting strip combined with a modular carbon brush reduces the difficulty and cost of later maintenance. Attached Figure Description
[0021] Figure 1 A schematic diagram of a preferred embodiment of the low-sparking characteristic motor carbon brush provided by this utility model;
[0022] Figure 2 This utility model provides a structural schematic diagram of the mounting buckle;
[0023] Figure 3 A schematic diagram of the commutator structure is provided for this utility model;
[0024] Figure 4 A schematic diagram of the lubricating block is provided for this utility model;
[0025] Figure 5 Provided for this utility model Figure 3 An enlarged view of point A shown.
[0026] The following are the labels in the diagram: 1. Carbon brush holder, 2. Rotor, 3. Support block, 4. Protective spring, 5. Connecting wire, 6. Adjustment component, 601. Movable block, 602. Fixing hole, 7. Mounting buckle, 8. Commutator, 9. Limiting component, 901. Fixing ring, 902. Elastic component, 903. Clamp, 10. Fixing plate, 11. First mounting strip, 12. Second mounting strip, 13. Lubricating block, 14. Conductive block, 15. Fixing block, 16. Fixing disc, 17. Arc-shaped elastic sheet, 18. Heat dissipation hole, 19. Mounting rail. Detailed Implementation
[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0028] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic diagram of a preferred embodiment of the low-sparking characteristic motor carbon brush provided by this utility model; Figure 2 This utility model provides a structural schematic diagram of the mounting buckle; Figure 3 A schematic diagram of the commutator structure is provided for this utility model; Figure 4 A schematic diagram of the lubricating block is provided for this utility model; Figure 5 Provided for this utility model Figure 3 The enlarged view at point A is shown. The low-sparking characteristic motor carbon brush includes: a carbon brush holder 1;
[0029] Multiple mounting buckles 7 are installed at one end of the carbon brush holder 1. Each mounting buckle 7 has an adjustment component 6 installed inside it via a limiting component 9. Each adjustment component 6 has a mounting rail 19 on one side. A first mounting strip 11 is installed inside the mounting rail 19 near one end via a fixing plate 10. A support block 3 is installed on the other side of the first mounting strip 11. A connecting line 5 is installed on the top of the support block 3.
[0030] Multiple second mounting strips 12 are respectively installed inside multiple mounting rails 19 near one end. Each second mounting strip 12 has a fixing block 15 installed on the other side. Each fixing block 15 has a conductive block 14 fixedly connected to its bottom. Each conductive block 14 has a lubricating block 13 fixedly connected to its bottom end. Two arc-shaped elastic pieces 17 are installed between the fixing block 15 and the support block 3 through two sets of fixing discs 16.
[0031] The support block 3, lubrication block 13, conductive block 14, and fixing block 15 are all made of conductive materials, while the mounting strip and mounting buckle 7 are made of insulating materials. When the motor is running, the lubrication block 13 can effectively reduce the friction coefficient between the carbon brush and the commutator, reduce frictional heat generation, and thus reduce the possibility of spark generation. The conductive block 14 uses high-purity, fine-grained graphite or graphite-based composite materials with added metal powders such as copper and silver to ensure good conductivity, conduct current out in a timely manner, and reduce arcing caused by poor conductivity. The support block 3 and fixing block 15 use high-strength carbon fiber reinforced resin materials to provide sufficient mechanical strength for the carbon brush as a whole, preventing the carbon brush from breaking or deforming under high-speed operation or large current impact, and ensuring stable operation of the motor. The fixing plate 16 and the arc-shaped elastic piece 17 are both made of conductive materials. Two fixing plates 16 are equipped with one arc-shaped elastic piece 17, and the contact position of the two arc-shaped elastic pieces 17 is fixed by bolts.
[0032] The top of each support block 3 is equipped with a protective spring 4, and heat dissipation holes 18 are provided on both sides of the fixing block 15 and the conductive block 14.
[0033] The heat dissipation hole 18 penetrates the fixing block 15 and the conductive block 14, and the protective spring 4 is sleeved on the outer surface of the connecting wire 5.
[0034] The carbon brush holder 1 is equipped with a commutator 8 inside, and a rotating shaft 2 is installed on the inner surface of the commutator 8.
[0035] The shaft of rotating shaft 2 is mounted on the inner surface of commutator 8.
[0036] The adjustment component 6 includes a movable block 601 and two rows of fixing holes 602, with the two rows of fixing holes 602 located on both sides of the movable block 601;
[0037] The movable block 601 is inserted into the interior of the mounting buckle 7, and the fixing hole 602 and the locking bolt 903 are connected to fix the movable block 601 in the corresponding position.
[0038] The limiting component 9 includes a retaining ring 901, an elastic component 902, and a bolt 903, wherein the elastic component 902 is used to provide tension to the bolt 903;
[0039] The retaining ring 901 uses the original elastic component 902, which is located on the outer surface of the bolt 903. The elastic component 902 is a spring.
[0040] The lubricating block 13 can be made of a composite material containing molybdenum disulfide and graphite powder, and both the first mounting strip 11 and the second mounting strip 12 are T-shaped;
[0041] The shapes of mounting rail 19 and mounting strip correspond to each other.
[0042] The working principle of the low-sparking characteristic motor carbon brush provided by this utility model is as follows:
[0043] First, the conductive support block 3 is fixed to the top of the mounting rail 19 on the front of the adjusting assembly 6 via the first mounting strip 11 and the fixing plate 10, ensuring that the first mounting strip 11 cannot move up and down inside the mounting rail 19. Then, the conductive fixing block 15 and the conductive block 14 with the conductive lubricating block 13 are installed inside the mounting rail 19 near the bottom via the second mounting strip 12, allowing the second mounting strip 12 to move up and down inside the mounting rail 19. After that, the conductive support block 3 and the fixing block 15 are connected by two arc-shaped elastic pieces 17 to achieve circuit flow. During use, the two arc-shaped elastic pieces 17 can filter out some vibrations and increase stability. When the motor carbon brush needs to be replaced, simply loosen the connection between the two arc-shaped elastic pieces 17, and then remove the second mounting strip 12 from inside the mounting rail 19 for replacement. The rest of the carbon brush does not need to be replaced.
[0044] Compared with related technologies, the low-sparking characteristic motor carbon brush provided by this utility model has the following beneficial effects:
[0045] To increase the stability of the motor carbon brushes and reduce the difficulty and cost of later maintenance, the conductive support block 3 is first fixed to the mounting rail 19 on the front of the adjusting assembly 6 near the top using the first mounting strip 11 and the fixing plate 10, ensuring that the first mounting strip 11 cannot move up and down inside the mounting rail 19. Then, the conductive fixing block 15 and the conductive block 14 with the conductive lubricating block 13 are installed inside the mounting rail 19 near the bottom using the second mounting strip 12, allowing the second mounting strip 12 to move up and down inside the mounting rail 19. Afterwards, only two arc-shaped... The elastic sheet 17 connects the conductive support block 3 and the fixing block 15, enabling circuit flow. During use, the two arc-shaped elastic sheets 17 can filter out some vibrations, increasing stability. When it is necessary to replace the motor carbon brush, simply loosen the connection between the two arc-shaped elastic sheets 17, and then remove the second mounting strip 12 from inside the mounting rail 19 for replacement. The rest of the carbon brush does not need to be replaced. This design increases the stability of the low-sparking characteristic motor carbon brush. At the same time, the use of a quick-installation mounting strip in conjunction with modular carbon brushes reduces the difficulty and cost of later maintenance.
[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A low-sparking characteristic motor carbon brush, characterized in that, include: Carbon brush holder; Multiple mounting buckles are installed at one end of the carbon brush holder. Each mounting buckle has an adjustment component installed inside via a limiting component. Each adjustment component has a mounting rail on one side. A first mounting strip is installed inside the mounting rail near one end via a fixing plate. A support block is installed on the other side of the first mounting strip. A connecting wire is installed on the top of the support block. Multiple second mounting strips are installed inside multiple mounting rails near one end. Each second mounting strip has a fixing block installed on the other side. Each fixing block has a conductive block fixedly connected to its bottom. Each conductive block has a lubricating block fixedly connected to its bottom end. Two arc-shaped elastic plates are installed between the fixing block and the support block through two sets of fixing discs.
2. The low-sparking-characteristic motor carbon brush according to claim 1, characterized in that, Each of the support blocks is equipped with a protective spring at its top, and both the fixing block and the conductive block have heat dissipation holes on their sides.
3. The low-sparking-characteristic motor carbon brush according to claim 1, characterized in that, The carbon brush holder is equipped with a commutator inside, and a rotating shaft is mounted on the inner surface of the commutator.
4. The low-sparking-characteristic motor carbon brush according to claim 1, characterized in that, The adjustment assembly includes a movable block and two rows of fixing holes, which are located on both sides of the movable block.
5. The low-sparking-characteristic motor carbon brush according to claim 1, characterized in that, The limiting assembly includes a retaining ring, an elastic component, and a locking bolt, wherein the elastic component is used to provide tension to the locking bolt.
6. The low-sparking-characteristic motor carbon brush according to claim 1, characterized in that, The lubricating block can be made of a composite material containing molybdenum disulfide and graphite powder, and both the first and second mounting strips are T-shaped.