A conductive brush for preventing electric leakage of a micro motor

Abstract

The present invention provides a conductive brush for preventing electric leakage of a micro motor, which relates to the technical field of motor power supply, and includes: an intermediate frame, the main body of the intermediate frame is of a U-shaped structure, and an assembly plate is fixedly arranged at the top of the intermediate frame; three brush rotators are hinged on both sides of the intermediate frame; assembly frames are fixedly arranged at the outer ends of the brush rotators; threaded top cylinders are threadedly connected in the middle above the assembly frames; the present invention adopts a hinge connection to install an adjustable voltage carbon brush, which can adjust the contact angle to adapt to different motors. By using an internal hexagonal wrench to rotate the lead screw to drive the sliding hinge seat to move, the control link is driven to move and cooperate with the universal joint to push the adjusting link outwards, so as to adjust the angle of the adjusting link and change the angles of the intermediate assembly frames on both sides, and rotate and adjust the angles of the two assembly frames at the same time, so as to realize the adjustment of the angle of the adjustable voltage carbon brush, with strong adaptability, and can adapt to work according to different models of motors and slip rings, solving the problem that the existing conductive brush is inconvenient to adjust the angle.

Description

Technical Field

[0001] The present invention relates to the technical field of motor power supply, and particularly relates to a conductive brush for preventing electric leakage of a micro motor. Background Art

[0002] The conductive brush in the electrode is different from the static brush used for the circuit board. It is a sliding contact part used to supply power to the rotor during the rotation of the motor. It mainly supplies power to the electromagnet in the rotor by the principle of continuous contact with the slip ring to ensure that the rotor can rotate. Generally, a carbon brush made of graphite is used to achieve power supply.

[0003] The currently used conductive brushes have the following disadvantages:

[0004] 1. The overall assembly of the conventional conductive brush adopts a fixed layout structure, which is inconvenient to adjust the contact angle as needed to adapt to different motors and achieve fitting installation;

[0005] 2. It is inconvenient to adjust the elastic stress of each adjustable voltage carbon brush and detect and monitor the stress;

[0006] 3. Lack of corresponding structures for convenient assembly, disassembly, and control. Summary of the Invention

[0007] In view of this, in order to solve the above-mentioned deficiencies existing in the prior art, the present invention provides a conductive brush for preventing electric leakage of a micro motor.

[0008] The present invention provides a conductive brush for preventing electric leakage of a micro motor, which specifically includes: a middle frame, the main body of the middle frame is a U-shaped structure, and an assembly plate is fixedly arranged on the top of the middle frame; three groups of brush rotating frames are hinged on both sides of the middle frame; assembly frames are fixedly arranged at the outer ends of the brush rotating frames; threaded top cylinders are threadedly connected in the middle above the assembly frames; pressure sensors are rotatably arranged in the middle of the threaded top cylinders through tapered roller bearings; square holes are opened at the bottoms of the assembly frames, and adjustable voltage carbon brushes are slidably arranged in the square holes of the assembly frames. Round grooves are opened in the middle of the tops of the adjustable voltage carbon brushes, and flange structures are integrally arranged on the side edges of the tops of the adjustable voltage carbon brushes; adjusting link rods are hinged on the tops of the middle two groups of brush rotating frames on both sides of the middle frame, universal joints are hinged at the other ends of the adjusting link rods, and control link rods are hinged at the other ends of the universal joints.

[0009] Optionally, the middle of each of the brush rotating frames is a square frame structure, a brush rod is passed through the square frame structures of the brush rotating frames on the same side, and a circuit connection is arranged at the tail end of the brush rod; the brush rod is fixedly connected to the middle of the square frame structure of the brush rotating frame through a set screw.

[0010] Optionally, a groove is opened in the middle of the top of the middle frame, and a guide rod is fixedly arranged in the groove; the front end of the guide rod is an internal hexagonal rod head structure for convenient control, and the rear end of the guide rod is a threaded structure.

[0011] Optionally, a lead screw is rotatably arranged in the middle of the middle frame, and the front end of the lead screw is a hexagonal rod head structure for convenient control.

[0012] Optionally, a sliding hinge seat is slidably arranged outside the guide rod, and the sliding hinge seat is in threaded connection with the lead screw; both sides of the sliding hinge seat are hinged to a group of control connecting rods.

[0013] Optionally, the bottom surfaces of the pressure sensors in the threaded top cylinder all exceed the threaded top cylinder; the upper edges of the outside of the threaded top cylinder are all hexagonal flange structures adapted to small wrenches.

[0014] Optionally, a pressing member is slidably arranged in the assembly frame, and a cylindrical structure is integrally arranged at the bottom of the pressing member. The cylindrical structure is sleeved with a spring and is slidably connected to a circular groove opened in the middle of the adjustable carbon brush.

[0015] Optionally, the middle frame, the pressing member, the adjusting connecting rod, the universal joint and the control connecting rod are all made of insulating materials; the outside of the assembly frame is all wrapped with a silicone layer for preventing electric leakage.

[0016] The beneficial effects are as follows:

[0017] 1. The present invention uses a hinge connection to install the adjustable carbon brush, which can adjust the contact angle to adapt to different motors. The lead screw is rotated by using an inner hexagonal wrench to drive the sliding hinge seat to move, drive the control connecting rod to move, cooperate with the universal joint to push the adjusting connecting rod outwards, adjust the angle of the adjusting connecting rod to change the angles of the two side middle assembly frames, and rotate and adjust the angles of the two side assembly frames simultaneously to realize the adjustment of the angle of the adjustable carbon brush. It has strong adaptability and can adapt to work according to different models of motors and slip rings.

[0018] 2. The present invention can adjust the elastic stress of each adjustable carbon brush. If the spring stress is insufficient, it will affect the contact. Therefore, after adjusting the adjustable carbon brush, the threaded top cylinder can be further rotated and tightened by using a wrench. When rotating the threaded top cylinder, the pressure sensor will be pushed towards the pressing member. The sensing end of the pressure sensor fits against the pressing member and compresses the spring, increasing the elastic force of the spring, ensuring that the adjustable carbon brush is closely attached to the slip ring, and at the same time, it can also realize detection and subsequent monitoring, providing convenience for adjusting the spring stress.

[0019] 3. The various components of the present application are convenient for replacement and use. For example, the hinge shaft of the middle frame and the brush rotating frame is a threaded head hinge shaft, which is convenient for installation and disassembly. The brush rotating frame and the brush rod are fixed by set screws, which is also convenient for disassembly and assembly. The pressure sensor and the threaded top cylinder are installed synchronously. During maintenance, the pressure sensor can be removed by disassembling the threaded top cylinder, which is convenient for maintenance. Description of the Drawings

[0020] Figure 1 Shows a three-dimensional structural schematic diagram according to an embodiment of the present invention;

[0021] Figure 2 Shows a schematic side elevation structure according to an embodiment of the present invention;

[0022] Figure 3 Shows a schematic disassembled structure according to an embodiment of the present invention;

[0023] Figure 4 Shows a schematic internal structure of an intermediate frame according to an embodiment of the present invention;

[0024] Figure 5 Shows a schematic three - dimensional structure of an intermediate frame according to an embodiment of the present invention;

[0025] Figure 6 Shows a schematic three - dimensional structure of an assembly frame according to an embodiment of the present invention;

[0026] Figure 7 Shows a schematic disassembled structure of an assembly frame according to an embodiment of the present invention;

[0027] Figure 8 Shows a schematic assembly structure of a brush carrier according to an embodiment of the present invention.

[0028] List of reference numerals:

[0029] 1, intermediate frame; 101, assembly plate; 102, guide rod; 103, lead screw; 104, sliding hinge seat; 2, brush carrier; 3, assembly frame; 4, threaded top cylinder; 5, pressure sensor; 6, adjustable pressure carbon brush; 7, fastening member; 8, adjusting link; 9, universal joint; 10, control link; 11, brush rod. Detailed implementation manners

[0030] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the specific embodiments of the present invention.

[0031] Embodiment 1: Please refer to Figures 1 to 8 as shown:

[0032] The present invention proposes a conductive brush for preventing leakage of a micro motor, comprising: an intermediate frame 1, the main body of the intermediate frame 1 is a U-shaped structure, and an assembly plate 101 is fixedly arranged on the top of the intermediate frame 1; three groups of brush rotating frames 2 are hingedly arranged on both sides of the intermediate frame 1; an assembly frame 3 is fixedly arranged on the outer end of the brush rotating frame 2; a threaded top cylinder 4 is threadedly connected in the middle of the upper part of the assembly frame 3; a pressure sensor 5 is rotatably arranged in the middle of the threaded top cylinder 4 through a tapered roller bearing; a square hole is opened at the bottom of the assembly frame 3, and an adjustable pressure carbon brush 6 is slidably arranged in the square hole of the assembly frame 3, a circular groove is opened in the middle of the top of the adjustable pressure carbon brush 6, and a flange structure is integrally arranged on the top side of the adjustable pressure carbon brush 6; an adjusting connecting rod 8 is hingedly arranged on the top of the two groups of brush rotating frames 2 in the middle of both sides of the intermediate frame 1, and a universal joint 9 is hingedly arranged on the other end of the adjusting connecting rod 8, and a control connecting rod 10 is hingedly arranged on the other end of the universal joint 9.

[0033] Among them, the middle of the brush rotating frame 2 is a square frame structure, and a brush rod 11 is inserted into the square structure of the brush rotating frame 2 on the same side, and a line connection is set at the tail end of the brush rod 11; the brush rod 11 is fixedly connected to the middle of the square structure of the brush rotating frame 2 by a top screw, and the positions of two groups of brush rotating frames 2 on one side can be fixed at the same time by one brush rod 11, so adjusting the angle of one group of brush rotating frames 2 can simultaneously adjust the angle of the adjacent brush rotating frames 2.

[0034] A groove is provided in the middle of the top of the intermediate frame 1, in which a guide rod 102 is fixedly arranged; the front end of the guide rod 102 is a hexagonal rod head structure for easy control, and the rear end of the guide rod 102 is a threaded structure.

[0035] A lead screw 103 is rotatably arranged in the middle of the intermediate frame 1, and the front end of the lead screw 103 is a hexagonal rod head structure for easy control.

[0036] A sliding hinge seat 104 is slidably provided outside the guide rod 102 , and the sliding hinge seat 104 is threadedly connected to the lead screw 103 ; both sides of the sliding hinge seat 104 are hingedly connected to a group of control connecting rods 10 .

[0037] The bottom surfaces of the pressure sensors 5 in the threaded top tube 4 are all beyond the threaded top tube 4 ; the outer upper edges of the threaded top tube 4 are all hexagonal flange structures adapted for small spanners.

[0038] Among them, a clamping piece 7 is slidably arranged in the assembly frame 3, and a cylindrical structure is integrally arranged at the bottom of the clamping piece 7. A spring is sleeved on the cylindrical structure and is slidably connected to a circular groove opened in the middle of the adjustable pressure carbon brush 6. Conventional carbon brushes only slide naturally through their external structure, and their own friction will cause reduction. They are stretched open by the force of the spring, but the stress is not maintained. The force provided by the spring will continue to decrease, resulting in loose contact. Therefore, a clamping piece 7 is often used for adjustment and control.

[0039] Among them, the middle frame 1, the pressing part 7, the adjusting link 8, the universal joint 9, and the control link 10 are all made of insulating materials; the outside of the assembly frame 3 is wrapped with a silicone layer that prevents electric leakage, providing the function of preventing electric leakage and not easily causing arcing inside the motor.

[0040] As Figures 1 - 8 shown, the assembly plate 101 is fixedly installed inside the motor by bolts. By turning the lead screw 103 with an Allen wrench, the sliding hinge seat 104 is driven to move. The sliding hinge seat 104 drives the control link 10 to move and cooperate with the universal joint 9 to push the adjusting link 8 outwards. By adjusting the angle of the adjusting link 8, the angles of the two middle assembly frames 3 on both sides are changed. The assembly frames 3 on the same side are uniformly connected by the brush rods 11. Furthermore, the assembly frames 3 on both sides rotate and adjust the angle simultaneously;

[0041] According to Figures 1 - 4 the method, the adjustable carbon brush 6 is rotated and fitted to the outside of the rotor slip ring to achieve fitting power supply.

[0042] Embodiment 2: On the basis of Embodiment 1, after the adjustable carbon brush 6 is fitted to the slip ring, it will automatically adapt. The spring between the pressing part 7 and the adjustable carbon brush 6 will increase the stress of the adjustable carbon brush 6 to keep the adjustable carbon brush 6 in contact with the slip ring. However, if the spring stress is insufficient, it will affect the contact. Therefore, after adjusting the adjustable carbon brush 6, the wrench can be used to further rotate and tighten the threaded barrel 4. When the threaded barrel 4 is rotated, it will push the pressure sensor 5 towards the pressing part 7. The sensing end of the pressure sensor 5 fits against the pressing part 7 and compresses the spring, increasing the spring force to ensure that the adjustable carbon brush 6 is tightly attached to the slip ring. At the same time, it can also achieve detection and subsequent monitoring, providing convenience for adjusting the spring stress.

[0043] Embodiment 3: On the basis of Embodiment 1, the hinge shaft of the middle frame 1 and the brush rotating frame 2 is a threaded head hinge shaft, which is convenient for installation and disassembly;

[0044] The brush rotating frame 2 and the brush rod 11 are fixed by set screws, which is also convenient for disassembly and assembly;

[0045] The pressure sensor 5 and the threaded barrel 4 are installed synchronously. During repair, removing the threaded barrel 4 can remove the pressure sensor 5.

[0046] The specific usage method and function of this embodiment: In the present invention, when in use, the assembly plate 101 is fixedly installed inside the motor by bolts. By turning the lead screw 103 with an Allen wrench, the sliding hinge seat 104 is driven to move. The sliding hinge seat 104 drives the control link 10 to move and cooperate with the universal joint 9 to push the adjusting link 8 outwards. By adjusting the angle of the adjusting link 8, the angles of the two middle assembly frames 3 on both sides are changed. The assembly frames 3 on the same side are uniformly connected by the brush rods 11. Furthermore, the assembly frames 3 on both sides rotate and adjust the angle simultaneously. By Figures 1 - 4In this way, the adjustable carbon brush 6 is rotated and fitted to the outside of the rotor slip ring to achieve contact power supply;

[0047] After the adjustable carbon brush 6 is fitted to the slip ring, it will automatically adapt. The spring between the pressing member 7 and the adjustable carbon brush 6 will increase the stress of the adjustable carbon brush 6 to keep the adjustable carbon brush 6 in contact with the slip ring. However, if the spring stress is insufficient, it will affect the contact. Therefore, after adjusting the adjustable carbon brush 6, a wrench can be used to further rotate and tighten the threaded barrel 4. When the threaded barrel 4 is rotated, it will push the pressure sensor 5 to move towards the pressing member 7. The sensing end of the pressure sensor 5 will fit against the pressing member 7 and compress the spring, increasing the spring force to ensure that the adjustable carbon brush 6 is tightly attached to the slip ring. At the same time, it can also achieve detection and subsequent monitoring, providing convenience for adjusting the spring stress;

[0048] The hinge shaft between the middle frame 1 and the brush rotating frame 2 uses a threaded head hinge shaft, which is convenient for installation and disassembly. The brush rotating frame 2 and the brush rod 11 are fixed by set screws, which is also convenient for disassembly and assembly. The pressure sensor 5 and the threaded barrel 4 are installed synchronously. During repair, removing the threaded barrel 4 can remove the pressure sensor 5.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0050] The details not described in the present invention are all well-known technologies to those skilled in the art.

[0051] The embodiments of the present invention are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the present invention and its practical application, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A conductive brush for preventing electric leakage of a micro motor, characterized in that, Including: An intermediate frame (1), the main body of the intermediate frame (1) is of a U-shaped structure, and an assembly plate (101) is fixedly arranged at the top of the intermediate frame (1); three groups of brush rotating frames (2) are hinged on both sides of the intermediate frame (1); assembly frames (3) are fixedly arranged at the outer ends of the brush rotating frames (2); threaded top cylinders (4) are threadedly connected in the middle above the assembly frames (3); pressure sensors (5) are rotatably arranged in the middle of the threaded top cylinders (4) through tapered roller bearings; square holes are formed at the bottoms of the assembly frames (3), and adjustable pressure carbon brushes (6) are slidably arranged inside the square holes of the assembly frames (3); adjusting connecting rods (8) are hinged at the tops of the middle two groups of brush rotating frames (2) on both sides of the intermediate frame (1), universal joints (9) are hinged at the other ends of the adjusting connecting rods (8), and control connecting rods (10) are hinged at the other ends of the universal joints (9); The bottom surfaces of the pressure sensors (5) in the threaded top cylinders (4) all extend beyond the threaded top cylinders (4); the outer upper edges of the threaded top cylinders (4) are all of a hexagonal flange structure adapted to a small wrench; Tightening members (7) are slidably arranged in the assembly frames (3), a cylindrical structure is integrally arranged at the bottom of the tightening member (7), a spring is sleeved on the cylindrical structure and is slidably connected with a circular groove formed in the middle of the adjustable pressure carbon brush (6); A groove is formed in the middle of the top of the intermediate frame (1), and a guide rod (102) is fixedly arranged in the groove; a lead screw (103) is rotatably arranged in the middle of the intermediate frame (1); A sliding hinge seat (104) is slidably arranged outside the guide rod (102), and the sliding hinge seat (104) is threadedly connected with the lead screw (103); both sides of the sliding hinge seat (104) are hinged with a group of control connecting rods (10).

2. The conductive brush for preventing electric leakage of a micro-motor according to claim 1, characterized in that, The middle of each of the brush rotating frames (2) is of a square frame structure, a brush rod (11) is arranged through the square frame structure of the brush rotating frames (2) on the same side, and a circuit connection is arranged at the tail end of the brush rod (11); the brush rod (11) is fixedly connected to the middle of the square frame structure of the brush rotating frame (2) through a setscrew.

3. The electrically conductive brush for preventing electric leakage of a micro motor according to claim 1, characterized in that, The front end of the guide rod (102) is of an internal hexagonal rod head structure for convenient control, and the rear end of the guide rod (102) is of a threaded structure.

4. The conductive brush for preventing electric leakage of a micro motor according to claim 1, wherein, The front end of the lead screw (103) is of an internal hexagonal rod head structure for convenient control.

5. The electrically conductive brush for preventing electric leakage of a micro motor according to claim 1, characterized in that, Circular grooves are formed in the middle of the tops of the adjustable pressure carbon brushes (6), and flange structures are integrally arranged on the side edges of the tops of the adjustable pressure carbon brushes (6).

6. The electrically conductive brush for preventing electric leakage of a micro motor according to claim 1, wherein, The intermediate frame (1), the tightening member (7), the adjusting connecting rod (8), the universal joint (9) and the control connecting rod (10) are all made of insulating materials; the outsides of the assembly frames (3) are all wrapped with a silicone layer for preventing electric leakage.

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