Double-side multi-angle automatic locking brush holder with multi-union box and replaceable plug-in spring

Abstract

The utility model provides a double-side multi-angle automatic locking brush holder with a multi-union box and a replaceable plug-in type spring, and relates to the field of electromechanical manufacturing. Comprising a brush holder body, the brush holder body comprises a brush box, a fixing plate and a handle, a plurality of carbon brush placement holes are formed in one side of the brush box, and constant-pressure springs are fixedly inserted into the carbon brush placement holes; the fixing plate is arranged on one side, back to the carbon brush placement hole, of the brush box, and two opposite side walls of the fixing plate are in a multi-angle relative inclined shape; the handle is arranged at the top of the fixing plate; a plurality of mounting grooves are formed in one side of the brush holder seat at intervals, the two opposite inner walls of the mounting grooves are in a multi-angle relative inclined shape and are matched with the two opposite side walls of the fixing plate, and the side walls of the mounting grooves are integrally formed. Uniform pressure can be provided for the carbon brush, the spring or the carbon brush can be replaced conveniently, and the carbon brush placement hole can be cleaned conveniently; the good contact between the brush holder and the brush holder seat can be improved, and the installation stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical manufacturing, and more specifically, to a double-sided, multi-angle automatic locking brush holder with replaceable pluggable springs for multi-compartment boxes. Background Technology

[0002] I. During the operation of a large steam turbine generator unit,

[0003] 1. Power Transmission: Slip rings are key components in steam turbine generators used to transmit electrical energy. When the rotor rotates, the slip rings contact the carbon brushes, transmitting electrical energy to the external circuitry via the brushes. The operational stability and performance of the slip rings directly affect the quality and efficiency of the generator's output power.

[0004] 2. Current Collection: The main function of the slip ring is to collect the current generated when a conductor passes through a magnetic field. When a conductor moves in a magnetic field, it generates an electromotive force, forming a current. The slip ring collects this electromotive force, forming a concentrated current, which is then delivered to other equipment or loads. Driving the Generator: The slip ring transfers the magnetic field energy generated by the stator windings to the rotor, causing the rotor to generate a rotating magnetic field, thereby driving the synchronous generator.

[0005] II. The function of carbon brushes

[0006] 1. Conducting and transmitting current: The carbon brush is responsible for conducting the externally supplied excitation current to the rotating rotor, providing the rotor with the required current. In addition, the carbon brush also introduces the static charge on the shaft to the ground, ensuring the stability of the output current.

[0007] 2. Commutation Function: In DC motors, carbon brushes also serve a commutation function, changing the direction of the current. The carbon brushes contact the connecting plates on the slip rings, directing the required current to the rotor coils.

[0008] 3. Protection and Measurement: The carbon brushes ground the main shaft, facilitating rotor grounding protection and measurement of the rotor's positive and negative voltages to ground.

[0009] III. Main functions of brush holders in steam turbine generators:

[0010] Pressure is applied to the brushes, which slide in contact with the commutator or slip ring surface, by a spring, ensuring stable current conduction between the stationary and rotating bodies.

[0011] Specifically, the functions of a brush grip include the following:

[0012] Stable current conduction: The brush holder applies pressure to the brush through a spring, making it make stable contact with the commutator or slip ring surface, thereby ensuring smooth current conduction between the stationary and rotating bodies.

[0013] 2. Protect the brush: The brush grip design helps protect the brush, preventing it from excessive wear or damage during operation, thereby extending the brush's lifespan.

[0014] Reduced sparks and noise: Through proper pressure and structural design, brush holders can reduce friction between the brushes and the commutator or slip rings, thereby reducing the generation of sparks and noise.

[0015] These functions together ensure the stability and reliability of the steam turbine generator during operation.

[0016] Original device flashing:

[0017] 1. Excessive spring pressure and severe carbon brush wear leading to frequent replacements result in excessively high slip ring temperatures. Uneven spring pressure over time causes unevenness, pitting, and poor parallelism on the slip ring surface. This uneven current distribution can easily cause arcing and sparking accidents.

[0018] 2. Insufficient spring pressure prevents the constant pressure spring from properly compressing the carbon brush. Over time, uneven spring pressure leads to poor contact between the carbon brush and the slip ring, resulting in uneven current. This can also cause the carbon brush and slip ring to overheat. Uneven current can easily cause arcing.

[0019] The workload and difficulty for operation and maintenance personnel have increased.

[0020] 3. The original unit's brush holder material uses a casting process.

[0021] The brush holder is made using a casting process. Over time, this will cause the brush holder to shrink. Consequently, the carbon brushes will not maintain good contact with the current collector.

[0022] The brush holder opening is too small. The copper braid of the carbon brush is stuck in the brush holder opening. The carbon brush cannot be pushed down.

[0023] The brush holder and brush holder base have angular contact surfaces on both sides. They are machined separately using a casting process. Poor contact surfaces, even point contact, result in poor conductivity.

[0024] 4-brush grip spring insert plate, old-style structure:

[0025] The brush holder spring is of poor quality. The spring pressure is uneven. The brush holder and spring insert plate use a riveted structure; if the spring pressure becomes uneven after a period of operation, and the spring insert plate cannot be replaced immediately, the brush holder must be replaced, or the brush holder must be sent back for repair. This is very expensive.

[0026] In the existing technology, the brush holders that house carbon brush assemblies are mostly complex in structure, making it difficult to install and remove carbon brushes. Moreover, the springs used are uneven in elasticity, and the springs are prone to failure. The springs themselves are also relatively complex, making it inconvenient to install or replace them. In addition, the contact surface between the brush holder and the brush holder seat is generally a two-sided contact surface, which is processed separately and then assembled, all of which can easily lead to poor contact. Utility Model Content

[0027] The purpose of this utility model is to provide a double-sided, multi-angle automatic locking brush holder with replaceable pluggable springs in a multi-compartment box, which can provide uniform pressure to the carbon brush, facilitate the replacement of springs or carbon brushes, and facilitate the cleaning of carbon brush mounting holes; it can improve the contact between the brush holder and the brush holder seat, and improve installation stability.

[0028] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0029] The multi-unit cartridge features replaceable pluggable springs and dual-sided multi-angle automatic locking brush grips, including:

[0030] The brush holder body includes a brush box, a fixing plate, and a handle. The brush box has multiple carbon brush mounting holes on one side, and a constant pressure spring is inserted and fixed in each carbon brush mounting hole. The fixing plate is located on the side of the brush box opposite to the carbon brush mounting holes, and the opposite side walls of the fixing plate are inclined at multiple angles. The handle is located on the top of the fixing plate.

[0031] The brush holder has multiple mounting grooves spaced apart on one side. The two inner walls of the mounting grooves are inclined at multiple angles and are adapted to the two side walls of the fixing plate. The side walls of the mounting grooves are integrally formed.

[0032] Furthermore, in this invention, the end of the spring sheet away from the coil spring is provided with a bent portion that bends toward one side of the coil spring.

[0033] Furthermore, in this utility model, the inner wall of the carbon brush mounting hole is provided with a insertion groove, and the side wall of the spring sheet near the bent part is provided with an insertion part, which is adapted to engage with the insertion groove.

[0034] Furthermore, in this utility model, the insertion / extraction part is formed by pressing a circular point on the side wall of the spring sheet towards one side, so that one side of the insertion / extraction part is an arc-shaped protrusion; the insertion / extraction groove is an arc-shaped groove, and the arc-shaped protrusion is adapted to the arc-shaped groove.

[0035] Furthermore, in this invention, the brush grip body is made of 62 brass.

[0036] Furthermore, in this invention, the number of carbon brush mounting holes is 1-6.

[0037] Furthermore, in this invention, the diameter of the carbon brush mounting hole is 5cm-10cm.

[0038] Furthermore, in this utility model, the inner walls of the mounting groove respectively include a first contact surface, a second contact surface and a third contact surface that are integrally connected in sequence. The first contact surface is perpendicular to the bottom wall of the mounting groove, the second contact surface has an inclination angle of less than 90° relative to the bottom of the mounting groove, and the third contact surface has an inclination angle of less than the inclination angle of the second contact surface relative to the bottom of the mounting groove.

[0039] Furthermore, in this utility model, the brush holder body also includes a pressure plate, which is connected to the bottom of the fixed plate through an adjustment component, and the top of one side of the pressure plate is fixedly connected to the side wall of the brush box. A plurality of compression springs are provided at intervals on the bottom of one side of the pressure plate. A plurality of spring holes are provided on the side wall of the brush box opposite to the pressure plate, and the spring holes correspond one-to-one with the compression springs. The compression springs pass through the spring holes and press against the constant pressure springs.

[0040] Furthermore, in this utility model, the adjusting component includes a rotating shaft and a pressure rod. The rotating shaft is rotatably inserted through the fixed plate and connected to the handle. The pressure rod is transversely inserted through the bottom of the rotating shaft and is opposite to the pressure plate.

[0041] This utility model has at least the following advantages or beneficial effects:

[0042] This invention features multiple carbon brush mounting holes in the brush holder for installing carbon brushes, forming a multi-unit brush holder that allows for the simultaneous installation of multiple carbon brushes. A constant-pressure spring is inserted into each mounting hole to ensure uniform spring pressure. The spring plate of the constant-pressure spring engages with the mounting hole, while the coil spring abuts against the center of the carbon brush, providing a fixed pressure. This plug-in design allows for quick replacement of the constant-pressure spring or carbon brush, and the simple connection structure facilitates cleaning of the mounting holes. Furthermore, the mounting plate and the inner wall of the brush holder are both angled at multiple angles, ensuring a good contact and preventing the brush from detaching under the reaction force of the carbon brush. This invention provides uniform pressure to the carbon brushes, facilitates spring or carbon brush replacement, and makes cleaning of the mounting holes easier. It also improves the contact between the brush holder and the holder, enhancing installation stability.

[0043] The new brush grip features a multi-section box with replaceable insert springs and a double-sided, multi-angle locking mechanism.

[0044] 1. The springs are plug-in type, allowing for easy replacement during operation. This saves power generation companies maintenance costs. No brush holders need repair or replacement.

[0045] 2. Employs a pluggable, large-coil constant-pressure spring with a spring pressure of 1.45 kg. Carbon brushes only need replacing once a year or more, saving costs. It's also environmentally friendly, reducing slip ring temperature and ensuring a balanced and stable current. No sparking.

[0046] The brush holder features a double-sided, multi-angle locking mechanism on the brush holder contact surface. The contact area between the brush holder and the brush holder base is 100%.

[0047] Current conduction is stable.

[0048] 4. The brush holder is made entirely of 62 brass. It has good conductivity and high density. Attached Figure Description

[0049] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 A schematic diagram of the overall structure of the double-sided multi-angle automatic locking brush holder with replaceable pluggable springs for the multi-unit box provided in the embodiments of this application;

[0051] Figure 2 Rear view of the double-sided multi-angle automatic locking brush holder with replaceable pluggable springs for the multi-unit box provided in the embodiment of this application;

[0052] Figure 3 A side view of a double-sided, multi-angle, automatically locking brush holder with a replaceable pluggable spring in a multi-unit box provided in an embodiment of this application.

[0053] Figure 4 A schematic diagram of the partial structure of the double-sided multi-angle automatic locking brush holder with replaceable pluggable springs in the multi-unit box provided in the embodiments of this application;

[0054] Figure 5 This is a schematic diagram of the structure of the constant pressure spring provided in the embodiments of this application;

[0055] Figure 6 This is a schematic diagram of the structure of the brush holder provided in an embodiment of this application;

[0056] Figure 7 For this application Figure 6 Enlarged schematic diagram of the structure at point A in the middle.

[0057] Icons: 11-Brush box, 111-Carbon brush mounting hole, 112-Insertion slot, 12-Fixing plate, 13-Handle, 14-Constant pressure spring, 141-Spring plate, 142-Coil spring, 143-Bending part, 144-Insertion part, 15-Pressure plate, 16-Compression spring, 17-Rotating shaft, 18-Pressure rod, 2-Brush grip, 21-Mounting slot, 211-First contact surface, 212-Second contact surface, 213-Third contact surface. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0059] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0060] Example

[0061] Please refer to Figures 1-7 The diagram shown is a schematic diagram of the double-sided multi-angle automatic locking brush grip of the replaceable pluggable spring in the multi-unit box in an embodiment of this utility model.

[0062] This embodiment provides a dual-sided, multi-angle, automatic locking brush holder with replaceable pluggable springs in a multi-section cartridge, including:

[0063] The brush holder body includes a brush box 11, a fixing plate 12, and a handle 13. The brush box 11 has multiple carbon brush mounting holes 111 on one side, and a constant pressure spring 14 is inserted and fixed within each carbon brush mounting hole 111. The constant pressure spring 14 includes a spring plate 141 and a coil spring 142. The spring plate 141 is inserted into the carbon brush mounting hole 111, and the coil spring 142 is fixed to one end of the spring plate 141. The fixing plate 12 is located on the side of the brush box 11 facing away from the carbon brush mounting holes 111, and the opposite side walls of the fixing plate 12 are inclined at multiple angles. The handle 13 is located on the top of the fixing plate 12.

[0064] The brush holder 2 has multiple mounting grooves 21 spaced apart on one side. The two inner walls of the mounting grooves 21 are inclined at multiple angles and are adapted to the two side walls of the fixing plate 12. The side walls of the mounting grooves 21 are integrally formed.

[0065] The following will further describe the dual-sided multi-angle automatic locking brush grip with replaceable pluggable springs in the multi-unit box of this exemplary embodiment.

[0066] In some embodiments of this application, reference is made to Figures 1-4 The brush holder body includes a brush box 11, a fixing plate 12, and a handle 13. Multiple carbon brush mounting holes 111 are provided on one side of the brush box 11. These holes are used to install carbon brushes, which must maintain good contact with the slip ring after passing through them. A large-coil constant-pressure spring 14 is inserted and fixed within the carbon brush mounting holes 111. This spring directly presses against the center surface of the carbon brush, providing constant pressure without eccentricity. The constant-pressure spring 14 includes a spring plate 141 and a coil spring 142. The spring plate 141 is inserted into the carbon brush mounting hole 111, and the coil spring 142 is fixed to one end of the spring plate 141. The constant-pressure spring 14 is designed as a plug-in connection, allowing for quick installation and removal. The constant-pressure spring 14 or the brush holder body can be quickly replaced during brush holder operation.

[0067] The aforementioned fixing plate 12 is located on the side of the brush holder 11 facing away from the carbon brush mounting hole 111. The opposite side walls of the fixing plate 12 are inclined at multiple angles. The handle 13 is located on the top of the fixing plate 12. The fixing plate 12 is used to fix the brush holder body, and the handle 13 facilitates the installation or removal of the brush holder body. Multiple mounting slots 21 are spaced apart on one side of the aforementioned brush holder 2. The opposite inner walls of the mounting slots 21 are inclined at multiple angles and adapt to the opposite side walls of the fixing plate 12. The side walls of the mounting slots 21 are integrally formed. The mounting slots 21 are used to install the fixing plate 12. Multiple mounting slots 21 can simultaneously install multiple brush holder bodies on one brush holder 2. The opposite side walls of the fixing plate 12 and the mounting slots 21 are both inclined at multiple angles, so that after the fixing plate 12 passes through the mounting slot 21, the outer wall of the fixing plate 12 and the inner wall of the mounting slot 21 fit together at different angles to improve contact performance.

[0068] As a preferred implementation method, refer to Figures 6-7 The inner walls of the mounting groove 21 include a first contact surface 211, a second contact surface 212, and a third contact surface 213 that are integrally connected in sequence. The first contact surface 211 is perpendicular to the bottom wall of the mounting groove 21. The inclination angle of the second contact surface 212 relative to the bottom of the mounting groove 21 is less than 90°. The inclination angle of the third contact surface 213 relative to the bottom of the mounting groove 21 is less than the inclination angle of the second contact surface 212. That is, both the inner wall of the mounting groove 21 and the outer wall of the fixing plate 12 are set to be inclined at three angles. The three inclined surfaces with different inclination angles achieve close contact with the outer wall of the fixing plate 12, ensuring good contact. Moreover, both the inner and outer walls are integrally formed, which further improves the contact performance compared to traditional right-angle surfaces and two separate connecting surfaces.

[0069] As a preferred implementation method, refer to Figure 5 The spring sheet 141 is provided with a bent portion 143 at the end away from the coil spring 142, which bends toward the coil spring 142. The bent portion 143 makes it easy for the operator to hold the constant pressure spring 14 during disassembly and assembly, thereby realizing quick plug-in replacement and disassembly, and avoiding the constant pressure spring 14 from falling due to inconvenience in holding it during disassembly and assembly.

[0070] As a preferred implementation method, refer to Figure 4 The inner wall of the carbon brush mounting hole 111 is provided with a insertion groove 112, and the side wall of the spring sheet 141 near the bent portion 143 is provided with an insertion portion 144, which is adapted to engage with the insertion groove 112. By setting the insertion groove 112 and the insertion portion 144 to engage with each other, when installing the spring sheet 141, simply pinch the bent portion 143 and insert it into the carbon brush mounting hole 111, so that the insertion portion 144 is engaged in the insertion groove 112. When disassembling, simply pinch the bent portion 143 and gently pull it away from the insertion groove 112, and then pull it out. The disassembly and assembly are convenient and quick.

[0071] As a preferred implementation method, refer to Figure 5 The aforementioned insertion / extraction portion 144 is formed by pressing a circular point on the side wall of the spring sheet 141 towards one side, so that one side of the insertion / extraction portion 144 is an arc-shaped protrusion; the insertion / extraction groove 112 is an arc-shaped groove, and the arc-shaped protrusion is adapted to the arc-shaped groove.

[0072] As a preferred embodiment, the brush holder body is made of 62 brass, which has high density and good electrical conductivity. It is manufactured directly using a CNC machine tool, achieving much higher precision compared to traditional casting processes, thus preventing the carbon brush from getting stuck on the inner wall of the brush holder 11.

[0073] As a preferred embodiment, the number of carbon brush mounting holes 111 is 1-6. The brush box 11 can be set as a two-piece box, a three-piece box, a four-piece box, a five-piece box or a six-piece box according to actual needs. Setting it as a multi-piece box can increase the conductivity efficiency of a single brush box 11.

[0074] In a preferred embodiment, the diameter of the carbon brush mounting hole 111 is 5cm-10cm, and the brush box 11 has a large opening so that the carbon brush can slide down after it wears out, thus saving carbon brushes.

[0075] As a preferred implementation method, refer to Figures 2-3The brush holder body also includes a pressure plate 15, which is connected to the bottom of the fixed plate 12 via an adjustment assembly. One top side of the pressure plate 15 is fixedly connected to the side wall of the brush holder 11, and multiple compression springs 16 are spaced apart on one bottom side of the pressure plate 15. Multiple spring holes are provided on the side wall of the brush holder 11 opposite to the pressure plate 15, with each spring hole corresponding to a compression spring 16. The compression springs 16 pass through the spring holes and press against the constant pressure spring 14. By setting the pressure plate 15 and multiple compression springs 16, and adjusting the insertion depth of the compression springs 16, the position and pressure of the constant pressure spring 14 within the carbon brush mounting hole 111 can be adjusted.

[0076] In a preferred embodiment, the adjustment assembly includes a rotating shaft 17 and a pressure rod 18. The rotating shaft 17 rotatably passes through the fixed plate 12 and is connected to the handle 13. The pressure rod 18 is laterally inserted through the bottom of the rotating shaft 17 and is opposite to the pressure plate 15. Specifically, the rotating shaft 17 and the fixed plate 12 can be threaded together to adjust the rotation angle of the rotating shaft 17. The rotation of the rotating shaft 17 drives the pressure rod 18 below the rotating shaft 17 to rotate, and the pressure rod 18 presses against the pressure plate 15, causing it to move closer to the brush box 11, thereby adjusting the position and pressure of the constant pressure spring 14.

[0077] In a preferred embodiment, the brush holder 11 has heat dissipation holes on the end face of each carbon brush mounting hole 111 perpendicular to the constant pressure spring 14. This design allows for the rapid dissipation of heat generated within the constant pressure spring 14 and the carbon brush mounting holes 111, preventing the constant pressure spring 14 from operating in a harsh environment and improving the heat dissipation effect of the brush holder 11.

[0078] Beneficial effects of the embodiments in this application:

[0079] The brush holder features a multi-unit, replaceable, pluggable spring with multiple locking angles. If the spring pressure is uneven, the spring can be replaced at any time. This eliminates the need to replace the brush holder, saving costs.

[0080] A large-coil single-pressure straight spring is used to directly press against the center surface of the carbon brush spring. The spring pressure is 1.25-1.45 kg. The carbon brush needs to be replaced once a year or more. The temperature of the slip ring is reduced. The current is stable and average, reducing slip ring wear.

[0081] The brush holder is made of H62 forged copper, which has high density and good conductivity. The brush holder and holder base must utilize a multi-joint, replaceable, pluggable spring for multi-angle locking. The contact surfaces of the brush holder and holder base are cut using a wire EDM machine and then machined on a CNC machining center. The brush holder and holder base are formed in one piece, with 100% contact surface coverage and excellent precision.

[0082] The new brush holder is precisely machined, ensuring the carbon brush and slip ring remain perpendicular. The distance between the carbon brush and slip ring is 3-5 mm, reducing the risk of damage to the carbon brush angle and simplifying operation and maintenance for personnel. Safe operation is also guaranteed.

[0083] The following table compares the cost and performance of brush holders with traditional brush grips:

[0084]

[0085]

[0086] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-sided multi-angle automatic locking brush holder with replaceable plug-in spring for multi-assembly box, characterized in that, Include: Brush handle body, the brush handle body includes brush box, fixed plate and handle, the brush box is equipped with a plurality of carbon brush installation hole on one side, the constant pressure spring is inserted and fixed in the carbon brush installation hole;The constant pressure spring includes spring sheet and coil spring, the spring sheet is inserted into the carbon brush installation hole, and the coil spring is fixed to the side wall of one end of the spring sheet;The fixed plate is arranged on the side of the brush box away from the carbon brush installation hole, and the opposite two side walls of the fixed plate are relatively inclined at multiple angles;The handle is arranged on the top of the fixed plate; The brush handle seat is equipped with a plurality of installation grooves on one side, the opposite two inner walls of the installation groove are relatively inclined at multiple angles and are matched with the opposite two side walls of the fixed plate, and the side wall of the installation groove is integrally formed.

2. The double-sided multi-angle auto-locking brush holder with replaceable plug-in spring of the cassette according to claim 1, characterized in that, The end of the spring sheet away from the coil spring is provided with a bending part bent towards the side of the coil spring.

3. The double-sided multi-angle auto-locking brush grip with replaceable plug-in spring of the magazine according to claim 2, characterized in that, The inner wall of the carbon brush installation hole is provided with a plug-in groove, the side wall of the spring sheet close to the bending part is provided with a plug-in part, and the plug-in part is matched with the plug-in groove.

4. The double-sided multi-angle auto-locking brush holder with replaceable and pluggable spring of the magazine according to claim 3, characterized in that, The plug-in part is extruded on the side of the spring sheet to form a circular point, so that one side of the plug-in part is circularly arc-shaped convex;The plug-in groove is circular arc-shaped groove, and the circular arc-shaped convex is matched with the circular arc-shaped groove.

5. The dual-sided multi-angle auto-locking brush holder with replaceable plug-in spring of the cassette according to claim 1, characterized in that, The material of the brush handle body is 62 brass.

6. The dual-sided multi-angle auto-locking brush holder with replaceable plug-in spring of the cassette according to claim 1, characterized in that, The number of carbon brush installation holes is 1-6.

7. The dual-sided multi-angle auto-locking brush grip with replaceable and pluggable spring of the magazine according to claim 1, characterized in that, The aperture width of the carbon brush installation hole is 5cm-10cm.

8. The dual-sided multi-angle auto-locking brush grip with replaceable and pluggable spring of the magazine according to claim 1, characterized in that, The opposite inner walls of the installation groove respectively include first contact surface, second contact surface and third contact surface which are integrally connected in sequence, the first contact surface is perpendicular to the bottom wall of the installation groove, the inclination angle of the second contact surface relative to the bottom of the installation groove is less than 90°, and the inclination angle of the third contact surface relative to the bottom of the installation groove is less than the inclination angle of the second contact surface.

9. The dual-sided multi-angle auto-locking brush grip with replaceable and pluggable spring of the magazine according to claim 1, characterized in that, The brush handle body further includes a pressing plate connected to the bottom of the fixed plate through an adjusting assembly, and one side of the top of the pressing plate is fixedly connected to the side wall of the brush box, and the bottom of one side of the pressing plate is equipped with a plurality of compression springs;The brush box and the opposite side wall of the pressing plate are equipped with a plurality of spring holes, the spring holes are one-to-one corresponding to the compression springs, and the compression springs are pressed in the constant pressure spring through the spring holes.

10. The double-sided multi-angle auto-locking brush grip with replaceable and pluggable spring of the magazine according to claim 9, characterized in that, The adjusting assembly includes a rotating shaft and a pressing rod, the rotating shaft is rotatably arranged in the fixed plate and connected with the handle, and the pressing rod is transversely arranged in the bottom of the rotating shaft and opposite to the pressing plate.

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