A carbon brush holder for an electric machine

Abstract

The utility model relates to carbon brush holder technical field, specifically disclose a motor carbon brush holder, include: motor carbon brush holder body, still include: connecting ring, connecting ring is located motor carbon brush holder body lower part, and the lower part fixed connection of connecting ring inner chamber has the base plate, two damping components, damping component symmetry sets up in the both sides of base plate, and damping component is used for the damping of motor carbon brush holder body, two buffer components, buffer component sets up in the installation groove inner chamber, and buffer component is used for the buffering of motor carbon brush holder body. Through being provided with damping component, thereby can utilize the periodic vibration energy that damping component effectively absorbs the armature rotation of motor operation process generates, prevents vibration and directly passes to motor carbon brush holder body, thereby reduces the jumping of carbon brush because of high frequency flutter, reduces spark grade, promotes the commutation performance, through being provided with buffer component, can provide elastic buffer when mechanical impact occurs, alleviates rigid impact damage to carbon brush and commutator.

Description

Technical Field

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

[0002] The carbon brush holder is a key component in DC motors or some AC commutator motors. It is mainly used to fix the carbon brushes and press them stably against the commutator surface of the motor, so as to realize the current conduction between the rotating armature and the external static power source. It is usually composed of brush holders, spring clamping mechanisms, conductive brush braids, insulating parts and mounting bases. Its structural design directly affects the contact pressure, sliding stability and heat dissipation performance between the carbon brush and the commutator. A good carbon brush holder structure can ensure smooth current transmission, reduce spark generation, and extend the service life of carbon brushes and commutators. It is an important link to ensure the reliable operation of the motor.

[0003] During motor operation, especially under conditions of high speed, heavy load, or large load fluctuation, armature vibration and electromagnetic shock are unavoidable. If the carbon brush holder is a rigid fixed structure, these vibrations will be directly transmitted to the carbon brush, causing the carbon brush and commutator to jump, contact pressure fluctuation, or even momentary separation, thereby causing problems such as increased sparking, poor commutation, and carbon brush breakage. In severe cases, it can cause a fire-fighting accident. To address this, we propose a motor carbon brush holder. Utility Model Content

[0004] The purpose of this utility model is to provide a motor carbon brush holder to solve the problem mentioned in the background art that existing rigid carbon brush holders are prone to carbon brush jumping and poor contact when the motor vibrates.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a motor carbon brush holder, comprising: a motor carbon brush holder body, wherein the lower part of the motor carbon brush holder body is symmetrically provided with mounting grooves, and the inner cavity of each mounting groove is symmetrically provided with connecting grooves, and the inner cavity of the connecting grooves communicates with the inner cavity of the mounting grooves; It also includes: a connecting ring, which is located at the lower part of the motor brush holder body, and a base plate is fixedly connected to the lower part of the inner cavity of the connecting ring; Two vibration damping components are symmetrically arranged on both sides of the base plate. The vibration damping components are used to dampen the vibration of the motor carbon brush holder body. Two buffer components are set in the inner cavity of the mounting slot. The buffer components are used to buffer the motor carbon brush holder body. Several limiting components are disposed in the inner cavity of the connecting groove, and the limiting components are used to limit the position of the buffer component in the inner cavity of the mounting groove.

[0006] The vibration damping component includes a first outer shell fixedly connected to the substrate, a first sliding plate slidably connected to the inner cavity of the first outer shell, a first connecting rod fixedly connected to the upper end of the first sliding plate, the substrate slidably connected to the first connecting rod, the inner cavity of the first outer shell being filled with silicone oil, the first sliding plate having symmetrically opened commutation holes, a second spring wound around the outer surface of the first connecting rod, the two sides of the second spring being fixedly connected to the upper end of the first outer shell and the lower end of the motor carbon brush holder body respectively, and the upper end of the first connecting rod being fixedly connected to the lower end of the motor carbon brush holder body.

[0007] The connecting ring has symmetrically arranged grooves in its inner cavity. Each groove has a first guide rod fixedly connected to it, and each groove has a slider slidably connected to it. The first guide rod is slidably connected to the slider, and a first spring is wound around the lower part of the outer surface of the first guide rod. The two sides of the first spring are fixedly connected to the lower end of the slider and the bottom wall of the groove, respectively.

[0008] The slider is T-shaped, and the two opposing surfaces of the slider are fixedly connected to the outer surface of the motor brush holder.

[0009] The buffer assembly includes a second connecting block fixedly connected to the upper end of the substrate. A second outer shell is fixedly connected to the upper end of the second connecting block. Two air holes are symmetrically opened on one side of the second outer shell, and the inner cavity of the air holes communicates with the inner cavity of the second outer shell. A second sliding plate is slidably connected to the inner cavity of the second outer shell. A second connecting rod is fixedly connected to the upper end of the second sliding plate. The second connecting rod is slidably connected to the second outer shell. A first connecting block is fixedly connected to the upper end of the second connecting rod.

[0010] The limiting component includes a third outer shell that is fixedly connected to the inner cavity of the adjacent connecting groove. A second guide rod is fixedly connected to the middle of the inner cavity of the third outer shell. A locking block is slidably connected to the middle of the third outer shell. The second guide rod is slidably connected to the locking block. A third spring is wound around the outer surface of the second guide rod. The two sides of the third spring are fixedly connected to the side of the locking block away from the first connecting block and the side of the inner wall of the third outer shell away from the locking block, respectively.

[0011] The first connecting block is located in the inner cavity of the adjacent mounting slot. The first connecting block has symmetrical slots, and the slots are used in conjunction with the adjacent slots.

[0012] This utility model has at least the following beneficial effects: By incorporating vibration damping components, the system effectively absorbs the periodic vibration energy generated by the armature rotation during motor operation, preventing the vibration from being directly transmitted to the motor brush holder. This reduces brush jumping due to high-frequency flutter, lowers the spark level, and improves commutation performance. The inclusion of buffer components provides elastic cushioning during mechanical impacts, mitigating damage to the brushes and commutator from rigid impacts and improving system stability and reliability. Furthermore, the presence of limit components restricts the position of the buffer components within the connecting slot, ensuring both the effective working stroke of the buffer components under normal operating conditions and preventing displacement during severe vibrations, thus guaranteeing the long-term stability and reliability of the vibration damping and buffering functions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram of the vibration damping component of this utility model; Figure 4 This is a schematic diagram of the buffer component of this utility model; Figure 5 This is a schematic diagram of the limiting component of this utility model.

[0014] In the diagram: 1. Motor brush holder body; 11. Connecting groove; 12. Mounting groove; 2. Connecting ring; 21. Base plate; 22. Slide groove; 221. First guide rod; 222. Slider; 223. First spring; 3. Vibration damping assembly; 31. First outer shell; 32. Second spring; 33. First connecting rod; 34. First sliding plate; 35. Exchanger hole; 4. Buffer assembly; 41. First connecting block; 411. Slot; 42. Second connecting rod; 43. Second sliding plate; 44. Second outer shell; 45. Air hole; 46. Second connecting block; 5. Limiting assembly; 51. Third outer shell; 52. Second guide rod; 53. Third spring; 54. Slot. Detailed Implementation

[0015] 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.

[0016] Example 1 Please see Figures 1 to 5This utility model provides a technical solution: a motor carbon brush holder, including: a motor carbon brush holder body 1, with symmetrically opened mounting grooves 12 on the lower part of the motor carbon brush holder body 1, and symmetrically opened connecting grooves 11 in the inner cavity of each mounting groove 12, and the inner cavity of the connecting groove 11 communicating with the inner cavity of the mounting groove 12. It also includes: a connecting ring 2, which is located at the lower part of the motor brush holder body 1, and a base plate 21 is fixedly connected to the lower part of the inner cavity of the connecting ring 2; Two vibration damping components 3 are symmetrically arranged on both sides of the base plate 21. The vibration damping components 3 are used to dampen the motor carbon brush holder body 1. Two buffer components 4 are provided, which are set in the inner cavity of the mounting slot 12. The buffer components 4 are used to buffer the motor carbon brush holder body 1. Several limiting components 5 are disposed in the inner cavity of the connecting groove 11. The limiting components 5 are used to limit the position of the buffer component 4 in the inner cavity of the mounting groove 12.

[0017] By incorporating vibration damping component 3, the periodic vibration energy generated by the armature rotation during motor operation can be effectively absorbed, preventing the vibration from being directly transmitted to the motor brush holder body 1. This reduces brush jumping due to high-frequency flutter, lowers the spark level, and improves commutation performance. By incorporating buffer component 4, elastic buffering can be provided when mechanical impact occurs, mitigating the damage to the brushes and commutator caused by rigid impact, and improving the system's operational stability and reliability. By incorporating limit component 5, the position of buffer component 4 in the connecting groove 11 can be limited, thus ensuring the effective working stroke of buffer component 4 under normal operating conditions and preventing displacement during severe vibration, ensuring the long-term stability and reliability of vibration damping and buffering functions.

[0018] The vibration damping assembly 3 includes a first outer shell 31 fixedly connected to the substrate 21. A first sliding plate 34 is slidably connected to the inner cavity of the first outer shell 31. A first connecting rod 33 is fixedly connected to the upper end of the first sliding plate 34. The substrate 21 is slidably connected to the first connecting rod 33. The inner cavity of the first outer shell 31 is filled with silicone oil. The first sliding plate 34 has symmetrically opened commutation holes 35. A second spring 32 is wound around the outer surface of the first connecting rod 33. The two sides of the second spring 32 are fixedly connected to the upper end of the first outer shell 31 and the lower end of the motor brush holder body 1, respectively. The upper end of the first connecting rod 33 is connected to the motor brush holder body 1. The lower end of the carbon brush holder body 1 is fixedly connected. The buffer assembly 4 includes a second connecting block 46 fixedly connected to the upper end of the substrate 21. A second outer shell 44 is fixedly connected to the upper end of the second connecting block 46. Two air holes 45 are symmetrically opened on one side of the second outer shell 44, and the inner cavity of the air holes 45 communicates with the inner cavity of the second outer shell 44. A second sliding plate 43 is slidably connected to the inner cavity of the second outer shell 44. A second connecting rod 42 is fixedly connected to the upper end of the second sliding plate 43. The second connecting rod 42 is slidably connected to the second outer shell 44. A first connecting block 41 is fixedly connected to the upper end of the second connecting rod 42. The limiting component 5 includes a third outer shell 51 fixedly connected to the inner cavity of the adjacent connecting groove 11. A second guide rod 52 is fixedly connected to the middle of the inner cavity of the third outer shell 51. A locking block 54 is slidably connected to the middle of the third outer shell 51. The second guide rod 52 is slidably connected to the locking block 54. A third spring 53 is wound around the outer surface of the second guide rod 52. The two sides of the third spring 53 are fixedly connected to the side of the locking block 54 away from the first connecting block 41 and the side of the inner wall of the third outer shell 51 away from the locking block 54, respectively. The first connecting block 41 is located in the inner cavity of the adjacent mounting groove 12. The first connecting block 41 is symmetrically provided with locking grooves 411. The locking block 54 is used in conjunction with the adjacent locking grooves 411.

[0019] When the motor brush holder body 1 is subjected to vibration and impact, it will slide towards the side of the substrate 21 within the inner cavity of the connecting ring 2. Since the first connecting rod 33 is fixedly connected to the lower end of the motor brush holder body 1, when the motor brush holder body 1 slides, it will also slide away from the motor brush holder body 1. This will cause the first sliding plate 34 to slide within the inner cavity of the first outer shell 31. Since the inner cavity of the first outer shell 31 is filled with silicone oil, the silicone oil located at the lower part of the first sliding plate 34 will flow through the commutation hole. The flow inside the 35 cavity reaches the upper part of the first slide plate 34. When the motor carbon brush holder body 1 slides, it will apply a force to the second spring 32, which can drive the second spring 32 to contract. Then, under the elastic force of the second spring 32, it will drive the second spring 32 to extend. Then, through the silicone oil resistance in the inner cavity of the first outer shell 31, it can slow down the sliding speed of the first connecting rod 33 towards the side of the motor carbon brush holder body 1, absorb the energy generated by vibration, thereby reducing the jumping of the carbon brush due to high frequency chatter, resulting in a low spark level and improved commutation performance. Since the first connecting block 41 is located in the inner cavity of the mounting groove 12, it is fixedly connected to the inner cavity of the connecting groove 11 through the third outer shell 51. Then, the elastic force of the third spring 53 drives the third spring 53 to extend, which can push the locking block 54 to slide in the inner cavity of the third outer shell 51 towards the inner cavity of the locking slot 411. The locking block 54 can be pushed into the inner cavity of the locking slot 411. Then, the cooperation between the locking block 54 and the locking slot 411 can limit the position of the first connecting block 41 in the inner cavity of the mounting groove 12. When the motor carbon brush holder body 1 slides towards the side of the substrate 21, it can drive the first connecting block 41 to slide together towards the side of the substrate 21. Then, the second connecting rod 42 can slide towards the side of the second connecting block 46 in the inner cavity of the second housing 44. The second sliding plate 43 can discharge the gas in the inner cavity of the second housing 44 from the inner cavity of the air hole 45. When the second sliding plate 43 and the second connecting rod 42 slide towards the side of the motor carbon brush holder body 1, the external gas can be drawn into the inner cavity of the second housing 44 from the inner cavity of another air hole 45. When the second sliding plate 43 is reset, it can form resistance on the second sliding plate 43, reduce the sliding speed of the second sliding plate 43, thereby alleviating the damage of rigid impact to the carbon brush and commutator, and improving the stability and reliability of system operation.

[0020] Example 2 The inner cavity of the connecting ring 2 is symmetrically provided with sliding grooves 22. Each sliding groove 22 is fixedly connected with a first guide rod 221. Each sliding groove 22 is slidably connected with a slider 222. The first guide rod 221 is slidably connected to the slider 222. The lower part of the outer surface of the first guide rod 221 is wound with a first spring 223. The two sides of the first spring 223 are fixedly connected to the lower end of the slider 222 and the bottom wall of the inner cavity of the sliding groove 22, respectively. The slider 222 is T-shaped. The opposite surfaces of the two sliders 222 are fixedly connected to the outer surface of the motor brush holder body 1.

[0021] The slider 222 is fixedly connected to the motor brush holder body 1, allowing the motor brush holder body 1 to slide towards the substrate 21. The slider 222 and the groove 22 cooperate to limit the displacement of the motor brush holder body 1. A first guide rod 221 is fixedly connected in the inner cavity of the groove 22, and the first guide rod 221 is slidably connected to the slider 222, thus connecting the slider 222. A first spring 223 is provided in the inner cavity of the groove 22, which supports the slider 222, forming resistance and slowing down the sliding speed of the slider 222, further consuming the energy generated by vibration.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] 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.

Claims

1. A motor carbon brush holder, comprising: The motor carbon brush holder body has symmetrically opened mounting grooves at the lower part of the motor carbon brush holder body, and each mounting groove has symmetrically opened connecting grooves in its inner cavity, and the inner cavity of the connecting groove communicates with the inner cavity of the mounting groove. Its characteristic is that it further includes: a connecting ring, the connecting ring being located at the lower part of the motor carbon brush holder body, and a base plate being fixedly connected to the lower part of the inner cavity of the connecting ring; Two vibration damping components are symmetrically arranged on both sides of the base plate, and the vibration damping components are used to dampen the motor carbon brush holder body; Two buffer components are disposed in the inner cavity of the mounting slot, and the buffer components are used to buffer the motor carbon brush holder body; A plurality of limiting components are disposed in the inner cavity of the connecting groove, and the limiting components are used to limit the position of the buffer component in the inner cavity of the mounting groove.

2. The motor carbon brush holder according to claim 1, characterized in that: The vibration damping assembly includes a first outer shell fixedly connected to a substrate, a first sliding plate slidably connected to the inner cavity of the first outer shell, a first connecting rod fixedly connected to the upper end of the first sliding plate, the substrate slidably connected to the first connecting rod, the inner cavity of the first outer shell being filled with silicone oil, the first sliding plate having symmetrically opened commutation holes, a second spring wound around the outer surface of the first connecting rod, the two sides of the second spring being fixedly connected to the upper end of the first outer shell and the lower end of the motor brush holder body respectively, and the upper end of the first connecting rod being fixedly connected to the lower end of the motor brush holder body.

3. The motor carbon brush holder according to claim 1, characterized in that: The inner cavity of the connecting ring is symmetrically provided with sliding grooves. Each sliding groove is fixedly connected with a first guide rod, and each sliding groove is slidably connected with a slider. The first guide rod is slidably connected to the slider. A first spring is wound around the lower part of the outer surface of the first guide rod. The two sides of the first spring are fixedly connected to the lower end of the slider and the bottom wall of the inner cavity of the sliding groove, respectively.

4. The motor carbon brush holder according to claim 3, characterized in that: The slider is T-shaped, and the two opposing surfaces of the slider are fixedly connected to the outer surface of the motor brush holder body.

5. The motor brush holder according to claim 1, characterized in that: The buffer assembly includes a second connecting block fixedly connected to the upper end of the substrate. A second outer shell is fixedly connected to the upper end of the second connecting block. Two air holes are symmetrically opened on one side of the second outer shell, and the inner cavity of the air holes communicates with the inner cavity of the second outer shell. A second sliding plate is slidably connected to the inner cavity of the second outer shell. A second connecting rod is fixedly connected to the upper end of the second sliding plate. The second connecting rod is slidably connected to the second outer shell. A first connecting block is fixedly connected to the upper end of the second connecting rod.

6. The motor carbon brush holder according to claim 5, characterized in that: The limiting assembly includes a third outer shell fixedly connected to the inner cavity of an adjacent connecting groove. A second guide rod is fixedly connected to the middle of the inner cavity of the third outer shell. A locking block is slidably connected to the middle of the third outer shell. The second guide rod is slidably connected to the locking block. A third spring is wound around the outer surface of the second guide rod. The two sides of the third spring are fixedly connected to the side of the locking block away from the first connecting block and the side of the inner wall of the third outer shell away from the locking block, respectively.

7. The motor carbon brush holder according to claim 6, characterized in that: The first connecting block is located in the inner cavity of the adjacent mounting slot. The first connecting block has symmetrical slots, and the slots are used in conjunction with the adjacent slots.

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