Electric brush with long service life for motor

Abstract

The utility model provides a long-service-life electric brush for a motor, which comprises a brush carrier, the brush carrier comprises a plurality of brush boxes, and the brush boxes are internally used for placing electric brush mechanisms; a cavity is formed in the center of the brush carrier and used for containing a rotating component, and the outer side of the brush carrier is fixedly connected with a machine cover. The brush device comprises a brush head, the bottom of the brush head is fixedly connected with a metal wire, and a spring is fixedly connected outside the metal wire; the head part of the brush head exceeds the edge of the central cavity of the machine cover; the tail end of the spring is fixedly connected with a contact piece; the brush carrier comprises six same brush boxes, and the six brush boxes are uniformly distributed on the circumference; the brush head is made of graphite; the brush head of the electric brush head is arranged to be arc-shaped, the number of the electric brushes is increased, the electric brushes are fixedly installed in a specific arc-shaped brush box, the size of the arc-shaped electric brushes is large under the same length space, the size of the electric brushes is increased on the whole, the abrasion period of the electric brushes is prolonged, and therefore the service life of the electric brushes is prolonged.

Description

TECHNICAL FIELD

[0001] The one or more embodiments of the specification relate to the technical field of electric machines, and particularly relate to a long-life electric brush for electric machines. BACKGROUND

[0002] The brush is an important component of an electric machine, responsible for conducting current between rotating and stationary parts.

[0003] In the prior art, the Chinese utility model patent with the application number 202121681023 and the patent name "brush assembly and electric machine" describes "a brush assembly, the adjusting groove on the carbon head is provided with two openings, and the conductive wire can be stretched out from different openings, so that the carbon head can realize different installation modes and improve the universality. In some specific embodiments of the utility model, as shown in the figure, the carbon head is provided with a slope, and the slope is arranged on the side of the carbon head away from the adjusting groove. The slope extends outwardly of the carbon head, when the size of the carbon head does not match the installation space of the electric machine, the carbon head cannot be placed in the installation space of the electric machine, the outward protruding side of the slope can be appropriately ground to reduce the size of the carbon head in the length direction, so that the carbon head can be placed in the installation space of the electric machine, thereby improving the universality of the carbon head", however, the carbon head described therein is easy to wear during use, which may cause the service life to be short. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the utility model is to provide a long-life electric brush for electric machines to solve the problem of prolonging the service life of the electric brush in the prior art.

[0005] In order to achieve the above purpose, the utility model provides a long-life electric brush for electric machines, which comprises a brush holder, the brush holder comprises a plurality of brush boxes, and the inside of the brush box is used for placing an electric brush mechanism;

[0006] A cavity is formed in the center of the brush holder for placing a rotating part, and the outer side of the brush holder is fixedly connected with a machine cover;

[0007] The electric brush device comprises a brush head, a metal wire is fixedly connected to the bottom of the brush head, a spring is fixedly connected to the outside of the metal wire for applying a certain pressure to the electric brush;

[0008] The brush head is arc-shaped to increase the contact area of the electric brush;

[0009] The head of the brush head exceeds the edge of the central cavity of the machine cover to maintain contact with the rotating part;

[0010] The end of the spring is fixedly connected with a contact sheet for conducting current.

[0011] Preferably, the brush holder comprises six identical brush boxes, and the six brush boxes are uniformly distributed in a circle.

[0012] Preferably, the front end of the brush box is provided with an outlet for extending the brush head;

[0013] The rear end of the brush box is fixedly connected with limiting plates on both sides for fixing the springs.

[0014] The limiting plates are centrally provided with slits for connecting the wires.

[0015] Preferably, the bottom of the limiting plate is fixedly connected with a junction box.

[0016] The junction box comprises junction tubes which are arranged on both sides in an arc shape, and the junction box is provided with a communication port at the end for centrally arranging the wires.

[0017] Preferably, the communication port is in communication with a junction ring.

[0018] The junction ring is arranged outside the brush holder and is in communication with the junction box through the communication ports.

[0019] Preferably, the brush head is made of graphite and has good conductivity and wear resistance.

[0020] As can be seen from the above, the electric brush with long service life for electric machines provided by the utility model has the advantages that the brush head of the electric brush is arranged in an arc shape, the number of the electric brushes is increased, the electric brushes are fixedly installed in the arc-shaped brush box, the volume of the arc-shaped electric brush is large under the same length space, the volume of the electric brush is increased as a whole, the wear period of the electric brush is prolonged, and the service life of the electric brush is increased. DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the one or more embodiments of the present specification or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only one or more embodiments of the present specification, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a front view of the overall structure of the utility model;

[0023] Figure 2 It is an enlarged view of a part of the utility model;

[0024] Figure 3 It is a front view of the overall structure of the utility model;

[0025] Figure 4 It is a sectional view of the utility model.

[0026] In the figure: 1, brush head; 2, spring; 3, metal wire; 4, terminal box; 5, brush holder; 6, contact sheet; 7, brush box; 8, cavity; 9, machine cover; 10, terminal ring; 11, communication port; 12, terminal tube; 13, limiting plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be combined with specific embodiments, and referring to the drawings, the utility model is further explained in detail.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the utility model should be the usual meaning understood by those skilled in the art to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] Embodiment one:

[0030] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , a long-life electric brush for motor is provided, which comprises a brush holder 5, the brush holder 5 comprises a plurality of brush boxes 7, and the inside of the brush box 7 is used for placing the electric brush mechanism;

[0031] The brush holder 5 is centrally provided with a cavity 8 for placing a rotating part, and the outer side of the brush holder 5 is fixedly connected with a machine cover 9;

[0032] The electric brush device comprises a brush head 1, the bottom of the brush head 1 is fixedly connected with a metal wire 3, the outside of the metal wire 3 is fixedly connected with a spring 2, which is used for applying a certain pressure to the electric brush and always maintaining good contact pressure;

[0033] Among them, the brush head 1 is arc-shaped, which is used for increasing the contact area of the electric brush, thereby increasing the overall service life of the electric brush;

[0034] The head of the brush head 1 exceeds the edge of the central cavity 8 of the machine cover 9, which is used for maintaining contact with the rotating part;

[0035] The spring 2 is fixedly connected with the contact piece 6 at the end, for conducting current and realizing the electric energy conversion of the motor.

[0036] The brush holder 5 comprises six identical brush boxes 7 which are uniformly distributed in the circumference.

[0037] The brush head 1 is made of graphite and has good electric conductivity and wear resistance.

[0038] Embodiment two:

[0039] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , a long-life brush for motor is provided, comprising a brush holder 5 which comprises a plurality of brush boxes 7 for placing the brush mechanism inside;

[0040] The brush holder 5 is centrally provided with a cavity 8 for placing the rotating part, and the brush holder 5 is fixedly connected with a cover 9 outside.

[0041] The brush device comprises a brush head 1 which is fixedly connected with a metal wire 3 at the bottom, and the metal wire 3 is fixedly connected with a spring 2 outside, for applying a certain pressure to the brush and always maintaining good contact pressure.

[0042] The brush head 1 is arc-shaped, for increasing the contact area of the brush and thus increasing the overall service life of the brush.

[0043] The head of the brush head 1 exceeds the edge of the central cavity 8 of the cover 9, for maintaining contact with the rotating part.

[0044] The spring 2 is fixedly connected with the contact piece 6 at the end, for conducting current and realizing the electric energy conversion of the motor.

[0045] The brush holder 5 comprises six identical brush boxes 7 which are uniformly distributed in the circumference.

[0046] The brush box 7 is provided with an outlet at the front end, for extending the brush head 1 and ensuring the continuity and stability of the current.

[0047] The brush box 7 is fixedly connected with a limiting plate 13 at the rear end on both sides, for fixing the spring 2 and fixing the brush at a proper position, preventing it from falling off or shifting during the operation of the motor.

[0048] The limiting plate 13 is centrally provided with a gap for connecting the wire.

[0049] The limiting plate 13 is fixedly connected with a junction box 4 at the bottom.

[0050] The wiring box 4 comprises wiring pipes 12, which are arranged on both sides in an arc shape, and the ends of the wiring box 4 are provided with communication openings 11 for centrally arranging the wires.

[0051] The communication openings 11 are communicated with the wiring rings 10.

[0052] The wiring rings 10 are arranged outside the brush holder 5 and communicated with the wiring box 4 through the communication openings 11.

[0053] The brush head 1 is made of graphite and has good conductivity and wear resistance.

[0054] Working principle: the electric brush is fixedly arranged in the brush box 7 on the brush holder 5, the brush head 1 is in contact with the rotating part, the contact piece 6 at the end of the electric brush is communicated with the wire, the wire is arranged in the wiring ring 10 through the wiring box 4, and the arc-shaped brush head 1 is continuously worn with the increase of the use time, and the pressure of the spring 2 makes the brush head 1 always contact with the rotating part.

[0055] It should be understood by those skilled in the art that the above discussion of any embodiment is only exemplary and is not intended to limit the scope of the disclosure (including the claims) to these examples; the above embodiments or technical features in different embodiments can also be combined under the idea of the utility model, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above, which are not provided in details for the sake of simplicity.

[0056] The embodiments of the utility model are intended to cover all such alternatives, modifications and variations falling within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement and the like made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A long-life brush for electric machines, comprising a brush holder (5), characterized in that: the brush holder (5) comprises several brush boxes (7), and the brush boxes (7) are internally used for placing brush mechanisms; a cavity (8) is formed in the center of the brush holder (5) for placing rotating parts, and the brush holder (5) is fixedly connected with a machine cover (9) outside; the brush mechanism comprises a brush head (1), the bottom of the brush head (1) is fixedly connected with a metal wire (3), the metal wire (3) is fixedly connected with a spring (2) outside, and the spring (2) is used for applying a certain pressure to the brush; wherein the brush head (1) is arc-shaped, and is used for increasing the contact area of the brush; the head of the brush head (1) exceeds the edge of the central cavity (8) of the machine cover (9), and is used for maintaining contact with the rotating parts; and the end of the spring (2) is fixedly connected with a contact sheet (6) for conducting current. The brush holder (5) comprises six identical brush boxes (7), and the six brush boxes (7) are uniformly distributed in a circle. An outlet is formed in the front end of the brush box (7) for extending the brush head (1); Limiting plates (13) are fixedly connected on both sides of the rear end of the brush box (7) for fixing the spring (2); wherein the limiting plates (13) are provided with gaps in the center for connecting wires. The limiting plates (13) are fixedly connected with terminal boxes (4) at the bottom; wherein the terminal boxes (4) comprise terminal tubes (12) which are arc-shaped and located on both sides, and the terminal boxes (4) are provided with communication openings (11) at the end for centrally installing wires.

2. The brush for a long-life electric machine according to claim 1, characterized by The communication openings (11) are in communication with terminal rings (10); 3. A brush for a long-life electric machine according to claim 2, characterized in that wherein the terminal rings (10) are located outside the brush holder (5) and are in communication with the terminal boxes (4) through the communication openings (11). The brush head (1) is made of graphite and has good conductivity and wear resistance. ​ 4. The brush for a long-life electric machine according to claim 3, wherein ​ ​ 5. A brush for a long-life electric machine according to claim 4, characterized in that ​ ​ 6. The brush of claim 1, wherein ​

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