CN212063720U

CN212063720U - Electric brush assembly and electric brush thereof

Info

Publication number: CN212063720U
Application number: CN202020706919.3U
Authority: CN
Inventors: 胡真
Original assignee: Derock Linear Actuator Technology Co ltd
Current assignee: Derock Linear Actuator Technology Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-30
Publication date: 2020-12-01
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a brush subassembly and brush thereof belongs to motor technical field. The brush includes brush shell, brush body, brush lead wire, and spring: the tail part of the electric brush shell is provided with a wire clamping groove, the bottom part of the electric brush shell is provided with an electric brush frame mounting structure, and the top part of the electric brush shell is provided with an elongated slot; the spring is arranged in the electric brush shell; the tail of the electric brush body is in contact with the spring and is arranged in the electric brush shell in a sliding mode, the head of the electric brush body extends out of the electric brush shell, and the electric brush lead penetrates through the long groove in the top of the electric brush shell to be electrically connected with the electric brush body. The utility model discloses a motor element's brush shell is equipped with the card wire casing, can block the brush lead wire when installing the brush component, with the brush body compression spring under the drawing of brush lead wire to in the indentation brush shell, thereby make things convenient for the assembly between brush component and the motor.

Description

Electric brush assembly and electric brush thereof

Technical Field

The utility model relates to the technical field of electric machine, especially, relate to a brush subassembly and brush thereof.

Background

The brush assembly is an important component of the electrical machine, which is responsible for conducting the electrical current between the rotating and stationary parts, and is often made of graphite, also called a carbon brush. The brush is usually mounted on a commutator or a slip ring of the motor and is a sliding contact.

Among the prior art, the brush subassembly includes brush yoke and brush, and the brush then includes brush shell, brush body and spring, and in order to make brush body and commutator or sliding ring contact, the brush body stretches out the brush shell under the effect of spring, supports on commutator or sliding ring, but, the brush shell is stretched out to the brush body, can influence the assembly between brush subassembly and the motor, causes the inconvenient problem of assembly.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a brush subassembly and brush thereof aims at solving and assembles inconvenient problem between brush subassembly and the motor among the prior art.

In order to achieve the above object, the utility model provides an electric brush, the electric brush includes brush shell, brush body, brush lead wire, and spring:

the tail part of the electric brush shell is provided with a wire clamping groove, the bottom part of the electric brush shell is provided with an electric brush frame mounting structure, and the top part of the electric brush shell is provided with an elongated slot;

the spring is arranged in the electric brush shell;

the tail of the electric brush body is in contact with the spring and is arranged in the electric brush shell in a sliding mode, the head of the electric brush body extends out of the electric brush shell, and the electric brush lead penetrates through the long groove in the top of the electric brush shell to be electrically connected with the electric brush body.

Preferably, the brush holder mounting structure comprises two guide rail grooves, and a positioning hole or a salient point is arranged between the two guide rail grooves.

In order to achieve the above object, the present invention also provides a brush assembly, which comprises the brush holder and at least two brushes as described above:

the electric brush frame comprises a PCB and a power line, wherein the PCB is provided with an electromagnetic interference circuit and at least two electric brush mounting structures, one end of the power line is electrically connected with the PCB, and the other end of the power line is provided with a wiring terminal;

the electric brush is arranged on the front surface of the electric brush frame, the electric brush frame mounting structure of the electric brush frame is matched with the electric brush mounting structure, and an electric brush lead is electrically connected with the power line.

Preferably, the brush holder is further provided with a circuit filter and a circuit protector:

the circuit filter and the circuit protector are arranged on the front surface of the PCB and are respectively electrically connected with the PCB.

Preferably, the electric brush mounting structure comprises two open slots which are arranged in parallel, and a salient point or a positioning hole is arranged between the two open slots;

two guide rail grooves of the electric brush shell are respectively arranged in the two open grooves of the electric brush frame and are matched with the side edges of the open grooves of the electric brush frame, and the salient points or the positioning holes of the electric brush shell are matched with the positioning holes or the salient points of the electric brush frame.

Preferably, a plurality of grounding wires are further arranged on the brush holder.

Preferably, the brush assembly is further provided with a first positioning piece and a second positioning piece, and the first positioning piece and the second positioning piece are symmetrical in position and wrap the outer edge of the brush holder.

Preferably, the power line passes through the first positioning member and is electrically connected with the PCB board.

Preferably, the first positioning piece and the second positioning piece are made of rubber materials.

The utility model provides an electric brush subassembly has following advantage:

1. the electric brush shell is provided with a wire clamping groove which can clamp an electric brush lead when the electric brush assembly is installed, and the electric brush body compresses the spring under the traction of the electric brush lead and retracts into the electric brush shell, so that the electric brush assembly and the motor can be conveniently assembled;

2. the electric brush frame and the electric brush can be separated, so that the structure of the electric brush frame is simplified, the electric brush is easy to replace, and the production and maintenance cost is reduced;

3. the brush holder and the brush shell are matched in a guide rail groove mode, so that the assembly and the replacement of the brush are convenient, and the positioning holes and the salient points are respectively arranged on the brush holder and the brush shell, so that the dislocation between the brush and the brush holder can be effectively prevented;

4. the edge of the electric brush frame is wrapped with the positioning block, so that a certain space is reserved between the electric brush assembly and the motor shell, and the electric brush frame and the electric brush lead are protected;

5. the electric brush frame adopts the PCB, reduces the quantity of various electronic components on the electric brush frame, can be combined with a circuit filter and a circuit protector arranged on the electric brush frame to realize the EMC anti-interference function, can effectively reduce the electromagnetic interference and reaches the EMC standard;

6. set up the spring between brush body and the brush shell, can effectively prevent the wearing and tearing of brush body, improve the life of brush body.

Drawings

Fig. 1 is a perspective view of an electric brush according to a first embodiment of the present invention;

FIG. 2 is an exploded view of the brush of FIG. 1;

fig. 3 is a perspective view of a brush assembly provided in an embodiment of the present invention;

FIG. 4 is a front exploded view of the brush assembly of FIG. 3;

fig. 5 is an exploded view of the back of the brush assembly shown in fig. 3.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Various embodiments for implementing the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "assembly", "structure", "module", "part", or "unit" used to denote elements are used only for the convenience of description of the present invention, and have no specific meaning in themselves.

In an embodiment of the present invention, referring to fig. 1 and 2, the brush 200 includes a brush case 210, a brush body 220, a brush lead 230, and a spring 240.

The bottom of the brush housing 210 is provided with a PCB board mounting structure that mates with the brush mounting structure. The PCB board mounting structure includes two guide rail grooves 211, and a bump is disposed between the two guide rail grooves 211 corresponding to the positioning hole 114. The two guide rail grooves 211 are respectively arranged in the two open grooves 113 and are matched with the side edges of the open grooves 113; the bumps mate with the locating holes 114. The tail of the brush housing 210 is provided with a snap groove 212 that is higher than the body of the brush housing 210.

The spring 240 is disposed inside the brush case 210, the brush body 220 contacts the spring 240, and the head portion protrudes from the brush case 210. The top of the brush case 210 is further provided with a long groove 213, and the brush lead 230 is electrically connected to the brush body 220 through the long groove 213 and electrically connected to the power line 300 through the PCB 110.

In practical applications, positioning posts can be disposed in the brush casing 210 and on the brush body 220 to position the two ends of the spring 240.

In this embodiment, the spring 240 is disposed between the brush body 220 and the brush casing 210, so that the brush body 220 can be effectively prevented from being worn, the service life of the brush body 220 can be prolonged, and the contact between the carbon brush and the commutator of the motor can be maintained.

In the brush of the present embodiment, the tail of the brush housing 210 is provided with a wire-locking groove 212 higher than the main body of the brush housing 210. The wire clamping groove 212 is used for clamping the brush lead 230 when the brush assembly is installed, so that the brush body 220 is pressed against the spring 240 under the traction of the brush lead 230, and the commutator of the motor can be smoothly installed. When the installation is complete, the brush lead 230 is removed from the snap groove 212 and the brush body 220 is contacted by the commutator under the action of the spring 240.

The second embodiment of the present invention provides a brush assembly, please refer to fig. 3 to 5, the brush assembly includes: a brush holder and a brush 200 as shown in the first embodiment.

The brush holder in this embodiment includes a circular PCB 110, a power line 300, a circuit filter 120, a first positioning member 410 and a second positioning member 420. The PCB 110 is provided with an anti-electromagnetic interference circuit. The edge of the PCB 110 is provided with a plug board 111, and two sides of the plug board 111 are respectively provided with a plug slot for receiving and electrically connecting two power leads 310, 320 of the power cord 300. The PCB 110 is provided with a slot at a position symmetrical to the board 111, and two ends of the slot are provided with a clamping block 112. The PCB 110 is further provided with two brush mounting structures, each brush mounting structure includes two parallel slots 113, and a positioning hole 114 is formed between the two slots 113. A plurality of ground wires 115 are also provided on the brush holder.

The circuit filter 120 and the circuit protector 130 are disposed on the front surface of the PCB 110 and electrically connected thereto.

In this embodiment, the anti-electromagnetic interference circuit is disposed on the PCB 110, and combined with the circuit filter 120 and the circuit protector 130, the anti-electromagnetic interference circuit can effectively reduce electromagnetic interference and achieve EMC standards.

In this embodiment, adopt the mode in guide rail groove to cooperate between PCB board 110 and the brush shell 210, make things convenient for the equipment and the change of brush to set up the locating hole on PCB board 110, set up the bump on brush shell 210, can prevent effectively that the brush from taking place the dislocation after the equipment is accomplished.

The power cord 300 has two power leads 310, 320 at one end and a terminal 330 at the other end. The power leads 310, 320 are respectively disposed in two insertion slots of the PCB 110.

The first positioning element 410 and the second positioning element 420 are made of rubber. The first positioning piece 410 is matched with the plug board 111 on the PCB 110, and the power line 300 passes through the first positioning piece 410 and is electrically connected with the PCB 110; the second positioning member 420 is engaged with the slot and the latch 112 at the symmetrical position of the board 111 on the PCB 110. First locating piece 410 and second locating piece 420 all wrap up in the edge of PCB board 110, and the adoption has elastic rubber material, on the one hand when assembling the brush subassembly to the motor, can play the positioning action of brush subassembly and motor housing, and on the other hand can make and reserve certain space between brush subassembly and the motor housing, plays the guard action to PCB board 110 and brush lead 230, can effectively prevent the short circuit problem because of brush lead 230 wearing and tearing arouse.

It should be noted that, in practical applications, the number of the brushes and the number of the second positioning elements may be set according to practical needs. The first positioning piece and the second positioning piece are made of rubber materials, and other materials with hardness and elasticity meeting requirements can be adopted. In addition, the structures of the salient points and the positioning holes on the electric brush frame and the electric brush shell can be interchanged. The shape of the brush holder is not limited to the ring shape, and can be designed according to actual requirements, such as square according to the shape of the motor shell.

The brush assembly of the present embodiment has the following advantages:

3. the brush holder and the brush shell are matched in a guide rail groove mode, so that the assembly and the replacement of the brush are convenient, and the brush holder is provided with the positioning hole and the brush shell is provided with the salient point, so that the brush can be effectively prevented from being misplaced on the brush holder;

4. the edge of the electric brush frame is wrapped with the first positioning block and the second positioning block, so that a certain space can be reserved between the electric brush assembly and the motor shell, and the electric brush frame and the electric brush lead are protected;

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electrical brush, comprising a brush housing, a brush body, a brush lead, and a spring:

the spring is arranged in the electric brush shell;

the tail of the brush body is in contact with the spring and is arranged in the brush shell in a sliding mode, the head of the brush body extends out of the brush shell, and the brush lead penetrates through the long groove in the top of the brush shell to be electrically connected with the brush body.

2. The brush of claim 1, wherein the brush holder mounting structure includes two rail grooves with locating holes or nubs disposed therebetween.

3. A brush assembly, characterized in that it comprises a brush and at least two brushes according to claim 1 or 2:

the electric brush is arranged on the front surface of the electric brush frame, the electric brush frame mounting structure of the electric brush is matched with the electric brush mounting structure, and an electric brush lead of the electric brush is electrically connected with the power line.

4. The brush assembly of claim 3, wherein the brush holder further includes a circuit filter and a circuit protector:

5. The brush assembly of claim 3, wherein the brush mounting structure includes two parallel slots with a boss or locating hole therebetween;

6. The brush assembly of claim 3, wherein the brush holder further includes a plurality of ground wires.

7. The brush assembly according to claim 3, further comprising a first positioning member and a second positioning member, wherein the first positioning member and the second positioning member are symmetrically positioned and wrapped around the outer edge of the brush holder.

8. The brush assembly of claim 7, wherein the power cord is electrically connected to the PCB board through the first locator.

9. The brush assembly according to claim 8, wherein the first and second positioning members are made of rubber.