CN213125701U

CN213125701U - Electric brush structure of direct current motor

Info

Publication number: CN213125701U
Application number: CN202021861601.9U
Authority: CN
Inventors: 苏天祺; 黄丽益; 赵阳
Original assignee: Shaanxi Hongning Railway Co ltd
Current assignee: Shaanxi Hongning Railway Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-05-04
Anticipated expiration: 2030-08-31

Abstract

The utility model discloses a direct current motor brush structure, including the motor end cover, set up the motor armature on the motor end cover, install a plurality of brush holders on the motor armature, set up the brush box on the brush holder, the inside pressure spring that sets up of brush box, the current conducting plate is connected to the pressure spring bottom, and the carbon brush is connected to the current conducting plate bottom, is provided with the copper sheet on the carbon brush, is equipped with carbon brush braid line an and carbon brush braid line b on the carbon brush, and binding post is connected to carbon brush braid line an and carbon brush braid line b bottom. The utility model discloses a carry out the cross arrangement setting to motor brush braid, effectively solved the emergence of motor carbon brush break-away phenomenon, guaranteed the normal work of motor, solved the mutual wear of motor brush braid and motor armature that exists among the prior art, the easy problem of break-away of brush braid.

Description

Electric brush structure of direct current motor

Technical Field

The utility model belongs to the technical field of electrical equipment, a DC motor brush structure is related to.

Background

The railway locomotive air compressor machine of section attachement of engineering, its brush braid receives factors such as locomotive vibration in the motor operation, appears the phenomenon that motor brush braid and motor armature rubbed and decreases each other near motor bearing end cover one side, and the motor is in high-speed operation, and brush braid rubs off very fast, causes the motor power supply to receive the influence, probably leads to burning loss motor when serious.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a direct current motor brush structure has solved the mutual wearing and tearing of the motor brush braid and the motor armature that exist among the prior art, and the problem that the brush braid easily ground off.

The utility model provides a technical scheme, a DC motor brush structure, including the motor end cover, set up the motor armature on the motor end cover, install a plurality of brush holders on the motor armature, set up the brush box on the brush holder, the inside pressure spring that sets up of brush box, the current conducting plate is connected to the pressure spring bottom, and the carbon brush is connected to the current conducting plate bottom, is provided with the copper sheet on the carbon brush, is equipped with carbon brush braid line an and carbon brush braid line b on the carbon brush, and binding post is connected to carbon brush braid line an and carbon brush braid line b bottom.

The utility model is also characterized in that,

the carbon brush braid line a and the carbon brush braid line b are twisted into a twist shape.

The brush box is in a long strip shape, and the middle cavity is provided with a rectangular groove.

The inside level of brush box is blocked and is established the pressure spring, and pressure spring one end is fixed inside the brush box, and the current conducting plate is fixed to the pressure spring other end welding.

The bottom of the brush box is provided with an opening, the conducting plate extends out of the opening of the brush box, and the top of the brush body of the carbon brush is matched with the inner cavity of the brush box.

The inner cavity of the electric brush box is provided with a mounting hole, the carbon brush is placed in the mounting hole, the bottom of the carbon brush is provided with a threaded hole, the threaded hole is fixedly connected with one end of a carbon brush braid line a and one end of a carbon brush braid line b respectively, the bottom of the carbon brush is connected with a copper sheet, and the carbon brush braid line a and the carbon brush braid line b penetrate through the copper sheet.

The motor end cover is matched with a bolt.

The beneficial effects of the utility model are that, a direct current motor brush structure, through carrying out the cross arrangement setting to motor brush braid, effectively solved the emergence of motor carbon brush break-away phenomenon, guaranteed the normal work of motor. The motor operation is reliable and stable, and the motor brush can be applied to the similar motor trouble of locomotive, can reduce the emergence of the similar trouble of motor, and motor carbon brush braid simple structure, and the practicality is high, improves the operation stability of motor.

Drawings

Fig. 1 is a schematic structural diagram of an electric brush of a direct current motor according to the present invention.

In the figure, 1, a motor end cover, 2, a motor armature, 3, a brush holder, 4, a brush box, 5, a pressure spring, 6, a current conducting plate, 7, a carbon brush, 8, a copper sheet, 9, a carbon brush braid wire a, 10, a carbon brush braid wire b and 11 are wiring terminals.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model relates to a dc motor brush structure, as shown in fig. 1, including motor end cover 1, set up motor armature 2 on the motor end cover 1, install a plurality of brush holders 3 on the motor armature 2, set up brush box 4 on the brush holder 3, brush box 4 is inside to be set up pressure spring 5, current conducting plate 6 is connected to pressure spring 5 bottom, carbon brush 7 is connected to current conducting plate 6 bottom, be provided with copper sheet 8 on the carbon brush 7, be equipped with carbon brush pigtail a9 and carbon brush pigtail b10 on the carbon brush 7, binding post 11 is connected to carbon brush pigtail a9 and carbon brush pigtail b10 bottom. The carbon brush braid a9 and the carbon brush braid b10 are twisted into a twisted shape, so that the carbon brush braid lead is prevented from contacting other objects and causing abrasion.

The brush box 4 is strip-shaped, and the middle cavity is provided with a rectangular groove; the inside level of brush box 4 is blocked and is established pressure spring 5, and 5 one end of pressure spring are fixed inside brush box 4, and 5 other ends of pressure spring weld fixation current conducting plate 6. The bottom of the brush box 4 is provided with an opening, the conducting plate 6 extends out of the opening of the brush box 4, the top of the brush body of the carbon brush 7 is matched with the inner cavity of the brush box 4, and the brush head of the carbon brush 7 extends out of the opening of the brush box 4; the carbon brush 7 core is made of conductive materials, so that the carbon brush is good in electric conduction and lubricating.

The inner cavity of the electric brush box 4 is provided with a mounting hole, the carbon brush 7 is placed in the mounting hole, the bottom of the carbon brush 7 is provided with a threaded hole, the threaded hole is fixedly connected with one end of a carbon brush braid a9 and one end of a carbon brush braid b10 respectively, the bottom of the carbon brush 7 is connected with the copper sheet 8, the carbon brush braid a9 and the carbon brush braid b10 penetrate through the copper sheet 8, the copper sheet 8 improves the connection stability of a wire and a carbon brush body, the possibility of separation of the wire and the carbon brush body is reduced, the maintenance rate is reduced, and the service life is.

The bolt is used in the cooperation of motor end cover 1, tears down motor end cover 1, can take out electric carbon brush 7 and change, conveniently dismantles for electric carbon brush 7 sticiss on brush box 4, has improved accuracy, the security of operation.

The utility model relates to an operating principle of DC motor brush structure, motor armature 2 supplies power through carbon brush 7, and carbon brush 7 dress is in brush box 4, and binding post 11 is linked through carbon brush braid a9 and carbon brush braid b10, has avoided because the motor work leads to the junction emergence fracture of wire and carbon brush and copper sheet, can guarantee effective contact when reducing the two frictional force, prolongs the life cycle of brush simultaneously, has saved the cost, has improved the practicality.

When the motor works, the brush braid of the carbon brush of the motor is in contact abrasion with the armature of the motor, and the brush braid of the carbon brush is abraded and broken when the motor works, so that the current distribution of the motor is uneven, and the normal work of the motor is influenced. The utility model can effectively ensure the quality of the product; meanwhile, the production efficiency is improved, and the personnel cost is saved. When the carbon brush is worn and changed, the carbon brush is timely changed through point inspection, and the carbon brush has the advantages of being simple in structure, convenient to assemble and design and good in effect.

In this embodiment, motor end cover 1 has 3 brush boxes 4, every brush box 4 is fixed on brush seat 3, 7 cores of carbon brush adopt graphite, connect two sets of carbon brush pigtail a9 and carbon brush pigtail b10, brush pigtail and adjacent brush pigtail cross mount in the brush box 4, it is effectual to prevent splitting, avoid brush pigtail and 2 contact wear of motor armature, it is spacing to carry out the carbon brush when can produce with other components and collide with to prevent that the carbon brush, make things convenient for the installation of brush. The brush braid of the motor brush is installed by using a cross method for 3 years, so that the abrasion and fracture phenomena of the brush braid are effectively avoided, and the normal work of the motor is ensured. After the motor brush installation process is improved, the operation of the motor is stable and reliable by application observation, the motor can be applied to the faults of the same type of motor of a locomotive, and the occurrence of the same type of faults of the motor can be reduced. The carbon brush braid crossing method of the motor is convenient and simple to operate and high in practicability, the running stability of the motor is improved, and the fault rate of the motor is reduced.

Claims

1. The utility model provides a direct current motor brush structure, a serial communication port, including motor end cover (1), set up motor armature (2) on motor end cover (1), install a plurality of brush holders (3) on motor armature (2), set up brush box (4) on brush holder (3), brush box (4) inside pressure spring (5) that set up, current conducting plate (6) are connected to pressure spring (5) bottom, carbon brush (7) are connected in current conducting plate (6), be provided with copper sheet (8) on carbon brush (7), be equipped with carbon brush braid a (9) and carbon brush braid b (10) on carbon brush (7), binding post (11) are connected to carbon brush braid a (9) and carbon brush braid b (10) bottom.

2. The brush structure of a direct current motor according to claim 1, wherein the carbon brush braid a (9) and the carbon brush braid b (10) are twisted in a twist shape.

3. A dc motor brush structure according to claim 1, characterized in that the brush box (4) is elongated and the intermediate chamber is slotted rectangular.

4. The brush structure of a direct current motor according to claim 1, wherein a compression spring (5) is horizontally clamped inside the brush box (4), one end of the compression spring (5) is fixed inside the brush box (4), and the other end of the compression spring (5) is welded to the fixed conductive plate (6).

5. A dc motor brush structure according to claim 1, characterized in that the brush box (4) is open at the bottom, the conducting plate (6) extends from the opening of the brush box (4), and the top of the brush body of the carbon brush (7) fits into the inner cavity of the brush box (4).

6. The direct current motor brush structure according to claim 1, characterized in that an inner cavity of the brush box (4) is provided with a mounting hole, the carbon brush (7) is placed in the mounting hole, the bottom of the carbon brush (7) is provided with a threaded hole, the threaded hole is fixedly connected with one end of a carbon brush braid line a (9) and one end of a carbon brush braid line b (10) respectively, the bottom of the carbon brush (7) is connected with the copper sheet (8), and the carbon brush braid line a (9) and the carbon brush braid line b (10) penetrate through the copper sheet (8).

7. A dc motor brush arrangement according to claim 1, characterized in that the motor end cover (1) is fitted with bolts.