Conductive brush for preventing electric leakage of micro motor

Abstract

The invention provides an anti-creeping conductive brush for a micro motor, and relates to the technical field of motor power supply, and the anti-creeping conductive brush comprises a middle frame, the main body of the middle frame is of a U-shaped structure, and the top of the middle frame is fixedly provided with an assembly plate; the two sides of the middle frame are each provided with three sets of electric brush rotating frames in a hinged mode. Assembling frames are fixedly arranged at the outer ends of the electric brush rotating stands; the middle of the upper portion of each assembling frame is in threaded connection with a threaded top cylinder. The pressure-adjustable carbon brushes are installed in a hinged mode, the contact angle can be adjusted to adapt to different motors, the lead screw is rotated through the internal hexagonal wrench to drive the sliding hinged support to move, the control connecting rod is driven to move to be matched with the universal joint to push the adjusting connecting rod outwards, and the angle of the adjusting connecting rod is adjusted to change the angle of the middle assembling frame on the two sides. The assembling frames on the two sides are rotated at the same time to adjust the angle, adjustment of the angle of the voltage-adjustable carbon brush is achieved, adaptability is high, work can be adapted according to different models of motors and slip rings, and the problem that an existing conductive brush is inconvenient to adjust the angle is solved.

Description

Technical Field

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

[0002] The conductive brush in the electrode is different from the electrostatic brush used in the circuit board. It is a sliding contact part used to power the rotor during the rotation of the motor. It mainly powers the electromagnet in the rotor through the principle of continuous contact with the slip ring to ensure that the rotor can rotate. Carbon brushes made of graphite are generally used to achieve power supply.

[0003] The conductive brushes currently used have the following disadvantages: 1. The conventional conductive brush assembly adopts a fixed layout structure, which makes it inconvenient to adjust the contact angle as needed to adapt to different motors and achieve adaptive installation; 2. It is inconvenient to adjust the elastic stress of each adjustable pressure carbon brush and to detect and monitor the stress; 3. Lack of corresponding structure for convenient assembly, disassembly and control. Summary of the invention

[0004] In view of this, the present invention aims at the deficiencies in the above-mentioned prior art and provides a conductive brush for preventing leakage of a micro motor.

[0005] The present invention provides a conductive brush for preventing leakage of a micro motor, which specifically comprises: an intermediate frame, wherein the main body of the intermediate frame is a U-shaped structure, and an assembly plate is fixedly arranged on the top of the intermediate frame; three groups of brush rotating frames are hingedly arranged on both sides of the intermediate frame; an assembly frame is fixedly arranged on the outer ends of the brush rotating frames; a threaded top cylinder is threadedly connected in the middle of the upper part of the assembly frame; a pressure sensor is rotatably arranged in the middle of the threaded top cylinder through a tapered roller bearing; a square hole is provided at the bottom of the assembly frame, and an adjustable pressure carbon brush is slidably arranged in the square hole of the assembly frame, a circular groove is provided in the middle of the top of the adjustable pressure carbon brush, and a flange structure is integrally arranged on the side of the top of the adjustable pressure carbon brush; an adjusting connecting rod is hingedly arranged on the top of the two groups of brush rotating frames in the middle of both sides of the intermediate frame, and a universal joint is hingedly arranged on the other end of the adjusting connecting rod, and a control connecting rod is hingedly arranged on the other end of the universal joint.

[0006] Optionally, the middle of the brush rotating frame is a square frame structure, a brush rod is passed through the square frame structure of the brush rotating frame on the same side, and a line connection is set 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 by a top screw.

[0007] Optionally, a groove is provided in the middle of the top of the intermediate frame, and a guide rod is fixedly arranged in the groove; the front end of the guide rod is a hexagonal rod head structure for easy control, and the rear end of the guide rod is a threaded structure.

[0008] Optionally, a lead screw is rotatably arranged in the middle of the intermediate frame, and the front end of the lead screw is a hexagonal rod head structure for easy control.

[0009] Optionally, a sliding hinge seat is provided on the outside of the guide rod for sliding movement, and the sliding hinge seat is threadedly connected to the lead screw; both sides of the sliding hinge seat are hingedly connected to a group of control connecting rods.

[0010] Optionally, the bottom surfaces of the pressure sensors in the threaded top barrel all extend beyond the threaded top barrel; and the outer upper edges of the threaded top barrel all have hexagonal flange structures adapted for small wrenches.

[0011] Optionally, a clamping piece is slidably arranged in the assembly frame, a cylindrical structure is integrally arranged at the bottom of the clamping piece, a spring is sleeved on the cylindrical structure and is slidably connected to a circular groove provided in the middle of the adjustable pressure carbon brush.

[0012] Optionally, the intermediate frame, the tightening piece, the adjusting connecting rod, the universal joint and the control connecting rod are all made of insulating materials; and the outside of the assembly frame is wrapped with a leakage-proof silicone layer.

[0013] The beneficial effects are as follows: 1. The present invention adopts a hinge connection to install the adjustable pressure carbon brush, and can adjust the contact angle to adapt to different motors. The hexagonal wrench is used to rotate the screw to drive the sliding hinge seat to move, and the control connecting rod is driven to move to cooperate with the universal joint to push the adjusting connecting rod outward. The angle of the adjusting connecting rod is adjusted to change the angle of the middle assembly frame on both sides. The assembly frames on both sides are rotated to adjust the angle at the same time to achieve the adjustment of the angle of the adjustable pressure carbon brush. It has strong adaptability and can adapt to work according to different models of motors and slip rings.

[0014] 2. The present invention can adjust the elastic stress of each adjustable pressure carbon brush. If the spring stress is insufficient, it will affect the contact. Therefore, after adjusting the adjustable pressure carbon brush, the threaded top cylinder can be further rotated and tightened with a wrench. When the threaded top cylinder is rotated, the pressure sensor will be pushed toward the tightening piece. The sensing end of the pressure sensor fits the tightening piece and tightens the spring, increasing the elastic force of the spring to ensure that the adjustable pressure carbon brush is close to the slip ring. At the same time, detection and subsequent monitoring can be achieved, providing convenience for adjusting the spring stress.

[0015] 3. The various components of the present application are easy to replace and use. For example, the hinge shafts of the intermediate frame and the brush rotating frame adopt threaded head hinge shafts, which are easy to install and disassemble. The brush rotating frame and the brush rod are fixed by top screws, which are also convenient for disassembly and assembly. The pressure sensor and the threaded top cylinder are installed simultaneously. When repairing, the pressure sensor can be removed by removing the threaded top cylinder, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a three-dimensional structure according to an embodiment of the present invention is shown; Figure 2A schematic diagram of a side tilt structure according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of a disassembled structure according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the internal structure of the frame according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the three-dimensional structure of a frame according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the three-dimensional structure of an assembly frame according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the disassembled structure of an assembly frame according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of the assembly structure of a brush rotating bracket according to an embodiment of the present invention is shown.

[0017] List of reference numerals: 1. Intermediate frame; 101. Assembly plate; 102. Guide rod; 103. Lead screw; 104. Sliding hinge seat; 2. Brush turret; 3. Assembly frame; 4. Threaded top cylinder; 5. Pressure sensor; 6. Adjustable pressure carbon brush; 7. Clamping piece; 8. Adjusting connecting rod; 9. Universal joint; 10. Control connecting rod; 11. Brush rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0019] Example 1: Please refer to Figures 1 to 8 As shown: 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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 .

[0024] 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.

[0025] 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.

[0026] Among them, the intermediate frame 1, the tightening piece 7, the adjusting connecting rod 8, the universal joint 9 and the control connecting rod 10 are all made of insulating materials; the outside of the assembly frame 3 is wrapped with an anti-leakage silicone layer to provide an anti-leakage function, which is not easy to spark and arc inside the motor.

[0027] like Figure 1-8 As shown, the assembly plate 101 is fixedly installed inside the motor with bolts, and the lead screw 103 is rotated by the hexagonal wrench to drive the sliding hinge seat 104 to move, and the sliding hinge seat 104 drives the control link 10 to move and cooperate with the universal joint 9 to push the adjustment link 8 outward, and the angle of the middle assembly frame 3 on both sides is changed by adjusting the angle of the adjustment link 8. The assembly frames 3 on the same side are uniformly connected through the brush rod 11, and then the assembly frames 3 on both sides are rotated to adjust the angle at the same time; according to Figure 1-4The adjustable voltage carbon brush 6 is rotated and fitted to the outside of the rotor slip ring to achieve fitting power supply.

[0028] Embodiment 2: On the basis of Embodiment 1, the adjustable pressure carbon brush 6 will automatically adapt after being fitted to the slip ring. The stress of the adjustable pressure carbon brush 6 will be increased through the spring between the clamping piece 7 and the adjustable pressure carbon brush 6 to keep the adjustable pressure carbon brush 6 fitted to the slip ring. However, if the spring stress is insufficient, the contact will be affected. Therefore, after adjusting the adjustable pressure carbon brush 6, the threaded top cylinder 4 can be further tightened with a wrench. When the threaded top cylinder 4 is rotated, the pressure sensor 5 will be pushed toward the clamping piece 7. The sensing end of the pressure sensor 5 will fit the clamping piece 7 and tighten the spring, increasing the elastic force of the spring to ensure that the adjustable pressure carbon brush 6 is tightly fitted to the slip ring. At the same time, detection and subsequent monitoring can be achieved, providing convenience for adjusting the spring stress.

[0029] Embodiment 3: Based on Embodiment 1, the hinge shafts of the intermediate frame 1 and the brush rotating frame 2 are threaded hinge shafts, which are easy to install and disassemble; The brush rotating frame 2 and the brush rod 11 are fixed by means of a top screw, which is also convenient for disassembly and assembly; The pressure sensor 5 and the threaded top cylinder 4 are installed synchronously. During maintenance, the pressure sensor 5 can be removed by disassembling the threaded top cylinder 4.

[0030] Specific usage and function of this embodiment: In the present invention, when in use, the assembly plate 101 is fixedly installed inside the motor with bolts, and the sliding hinge seat 104 is driven to move by rotating the screw 103 with an inner hexagonal wrench, and the sliding hinge seat 104 drives the control link 10 to move and cooperate with the universal joint 9 to push the adjustment link 8 outward, and the angle of the middle assembly frame 3 on both sides is changed by adjusting the angle of the adjustment link 8. The assembly frames 3 on the same side are uniformly connected through the brush rod 11, and then the assembly frames 3 on both sides are rotated to adjust the angle at the same time, and the angle is adjusted by Figure 1-4 The adjustable voltage carbon brush 6 is rotated and fitted to the outside of the rotor slip ring to achieve fitting power supply; The adjustable pressure carbon brush 6 will automatically adapt after being fitted to the slip ring. The spring between the clamping piece 7 and the adjustable pressure carbon brush 6 will increase the stress of the adjustable pressure carbon brush 6 to keep the adjustable pressure 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 pressure carbon brush 6, a wrench can be used to further tighten the threaded top cylinder 4. When the threaded top cylinder 4 is rotated, the pressure sensor 5 will be pushed toward the clamping piece 7. The sensing end of the pressure sensor 5 will fit the clamping piece 7 and tighten the spring, increasing the elastic force of the spring to ensure that the adjustable pressure carbon brush 6 is in close contact with the slip ring. At the same time, detection and subsequent monitoring can be achieved, providing convenience for adjusting the spring stress. The hinge shafts of the intermediate frame 1 and the brush rotating frame 2 adopt threaded head hinge shafts, which are easy to install and disassemble. The brush rotating frame 2 and the brush rod 11 are fixed by top screws, which are also convenient for disassembly and assembly. The pressure sensor 5 and the threaded top cylinder 4 are installed simultaneously. When repairing, the pressure sensor 5 can be removed by removing the threaded top cylinder 4.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0032] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0033] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A conductive brush for preventing leakage of a micro motor, characterized in that: include: An intermediate frame (1), wherein the intermediate frame (1) has a main body of 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 to 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 inside the square hole of the assembly frame (3); 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 the other end of the adjusting connecting rod (8) is hingedly arranged with a universal joint (9), and the other end of the universal joint (9) is hingedly arranged with a control connecting rod (10).

2. A conductive brush for preventing leakage of a micro motor as claimed in claim 1, characterized in that: The middle of the brush rotating frame (2) is a square frame structure, a brush rod (11) is inserted into the square frame structure of the brush rotating frame (2) on the same side, and a line 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) by means of a top screw.

3. A conductive brush for preventing leakage of a micro motor as claimed in claim 1, characterized in that: A groove is provided in the middle of the top of the intermediate frame (1), and a guide rod (102) is fixedly arranged in the groove.

4. A conductive brush for preventing leakage of a micro motor as claimed in claim 3, characterized in that: 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.

5. A conductive brush for preventing leakage of a micro motor as claimed in claim 1, characterized in that: 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.

6. A conductive brush for preventing leakage of a micro motor as claimed in claim 1, characterized in that: The adjustable pressure carbon brush (6) is provided with a circular groove in the middle of the top, and a flange structure is integrally provided on the side of the top of the adjustable pressure carbon brush (6).

7. A conductive brush for preventing leakage of a micro motor as claimed in claim 5, characterized in that: The guide rod (102) is slidably provided with a sliding hinge seat (104) on the outside, and the sliding hinge seat (104) is threadedly connected to the lead screw (103); both sides of the sliding hinge seat (104) are hinge-connected to a group of control connecting rods (10).

8. A conductive brush for preventing leakage of a micro motor as claimed in claim 1, characterized in that: The bottom surface of the pressure sensor (5) in the threaded top cylinder (4) exceeds the threaded top cylinder (4); the outer upper edge of the threaded top cylinder (4) is a hexagonal flange structure suitable for a small spanner.

9. A conductive brush for preventing leakage of a micro motor as claimed in claim 7, characterized in that: 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 provided in the middle of the adjustable pressure carbon brush (6).

10. A conductive brush for preventing leakage of a micro motor as claimed in claim 9, characterized in that: The intermediate frame (1), the tightening piece (7), the adjusting connecting rod (8), the universal joint (9) and the control connecting rod (10) are all made of insulating materials; and the outside of the assembly frame (3) is wrapped with a leakage-proof silicone layer.

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