阅读说明：本技术 一种径向碳刷装置 (Radial carbon brush device ) 是由 窦国平 郭齐江 于 2020-07-03 设计创作，主要内容包括：本发明涉及一种径向碳刷装置,包括电机和安装在电机内腔中的转子和定子铁芯,转子的转轴外侧安装有刷架、碳刷组件和保护电路安装座,碳刷组件包括碳刷,碳刷组件安装在刷架的内部,电机壳上通过开设安装孔安装有防护盖,电机壳内壁靠近防护盖的位置开设有滑槽,滑槽内安装有与滑槽滑动连接的换向器,换向器的内壁与碳刷的外壁相接触实现电导通,并与碳刷滑动连接,换向器与保护电路安装座中的电路电性连接。碳刷组件将碳刷与线圈接线头之间通断交替产生的电火花或产生电弧从转子,由内到外引导至电机的保护电路中,消除电机工作时产生的换向电弧,实现无弧换向作用,保障碳刷有一个良好的导电性能,延长电机的使用寿命。(The invention relates to a radial carbon brush device, which comprises a motor, a rotor and a stator core, wherein the rotor and the stator core are arranged in an inner cavity of the motor, a brush holder, a carbon brush assembly and a protective circuit mounting seat are arranged outside a rotating shaft of the rotor, the carbon brush assembly comprises a carbon brush, the carbon brush assembly is arranged inside the brush holder, a protective cover is arranged on a motor shell through an installation hole, a sliding groove is formed in the position, close to the protective cover, of the inner wall of the motor shell, a commutator in sliding connection with the sliding groove is arranged in the sliding groove, the inner wall of the commutator is in contact with the outer wall of the carbon brush to realize electric conduction and is in sliding connection with the carbon brush, and the commutator is electrically connected with a circuit in the protective circuit mounting seat. The carbon brush assembly guides electric sparks or electric arcs generated by the alternate on-off of the carbon brush and the coil connector lug from the rotor to a protection circuit of the motor from inside to outside, eliminates the commutation electric arcs generated when the motor works, realizes the arc-free commutation effect, ensures that the carbon brush has good conductive performance, and prolongs the service life of the motor.)

1. The utility model provides a radial carbon brush device, includes motor (1) and installs rotor (11) and stator core (12) in motor (1) inner chamber, rotor (11) rotate through the bearing and connect on motor (1) center axis, stator core (12) are fixed on motor casing (13) inner wall of motor (1), its characterized in that: brush yoke (2), carbon brush subassembly (3) and protection circuit mount pad (4) are installed in the pivot outside of rotor (11), carbon brush subassembly (3) include carbon brush (31), the inside at brush yoke (2) is installed in carbon brush subassembly (3), protective cover (14) are installed through seting up the mounting hole on motor casing (13), spout (16) have been seted up to the position that motor casing (13) inner wall is close to protective cover (14), install commutator (15) with spout (16) sliding connection in spout (16), the inner wall of commutator (15) with the outer wall of carbon brush (31) contacts, and with carbon brush (31) sliding connection, the one end of commutator (15) and the circuit electric connection in protection circuit mount pad (4).

2. A radial carbon brush system according to claim 1, characterized in that: the shaft sleeve (17) is installed through the cotter in the pivot outside of rotor (11), brush yoke (2) and carbon brush subassembly (3) fixed mounting are in the outside of shaft sleeve (17).

3. A radial carbon brush system according to claim 2, characterized in that: brush yoke (2) are including brush holder (21) and brush sleeve (22), brush sleeve (22) suit is in the inside of brush holder (21), the top of brush sleeve (22) is fixed with brush holder (21) through fixed pin (24), the bottom of brush holder (21) is equipped with spacing groove (23), carbon brush subassembly (3) still include spring (32) and copper (33), carbon brush (31), spring (32), copper (33) set gradually from the outside in the footpath of pivot, carbon brush (31) are through spring (32) and copper (33) electric connection, copper (33) clamp in spacing groove (23).

4. A radial carbon brush system according to claim 2, characterized in that: brush yoke (2) are including brush holder (21) and brush sleeve (22), draw-in groove (27) have been seted up to the bottom of brush holder (21), the intercommunication has been seted up to one side inner wall of brush holder (21) slot (26) of draw-in groove (27), brush sleeve (22) suit is in the inside of brush holder (21), brush sleeve (22) one side bottom is fixed with fixture block (25), fixture block (25) with draw-in groove (27) joint, the bottom of brush holder (21) is equipped with spacing groove (23), carbon brush subassembly (3) still include spring (32) and copper (33), carbon brush (31), spring (32), copper (33) set gradually from the extroversion in the footpath of pivot, carbon brush (31) pass through spring (32) and copper (33) electric connection, copper (33) clamp in spacing groove (23).

5. A radial carbon brush system according to claim 2 or 3, characterized in that: the carbon brush (31) is in any one of a square block-shaped structure and a cylindrical structure.

6. A radial carbon brush system according to claim 1, characterized in that: the protective cover (14) is made of rubber, and at least two protective covers (14) are arranged on the motor shell (13).

7. A radial carbon brush system according to claim 1, characterized in that: and a circuit in the protection circuit mounting seat (4) is a follow current circuit.

Technical Field

The invention relates to the technical field of motor carbon brushes, in particular to a radial carbon brush device with a carbon brush assembly arranged on a motor rotor and a commutator immovable.

Background

The carbon brush is a device for transmitting energy or signals between a fixed part and a rotating part of a motor or a generator or other rotating machinery, is generally made of pure carbon and a coagulant, is generally square in shape, is clamped on a metal support, is tightly pressed on a rotating shaft by a spring inside, and transmits electric energy to a coil through a commutator when the motor rotates.

The carbon brush can rub due to mutual sliding of the carbon brush and the conductive electrode on the motor shell in the using process of the motor, so that loss is caused, and the carbon brush needs to be replaced periodically. However, the carbon brush and the coil connector lug are alternately switched on and off, an electric arc is generated, electromagnetic waves are generated to interfere electronic equipment, and the electric arc easily causes an oxide layer to be formed on the surface of the electrode, so that the conductivity of the electrode is poor.

Disclosure of Invention

The present invention is directed to a radial carbon brush apparatus to solve the above-mentioned problems encountered in the background art.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a radial carbon brush device, includes the motor and installs rotor and stator core in motor cavity, the rotor passes through the bearing and rotates the connection on the motor center axis, stator core fixes on the motor casing inner wall of motor, brush yoke, carbon brush subassembly and protection circuit mount pad are installed to the pivot outside of rotor, the carbon brush subassembly includes the carbon brush, the carbon brush unit mount is in the inside of brush yoke, install the protective cover through seting up the mounting hole on the motor casing, the spout has been seted up to the position that the motor casing inner wall is close to the protective cover, install the commutator with spout sliding connection in the spout, the inner wall of commutator with the outer wall of carbon brush contacts, and with carbon brush sliding connection, circuit electric connection in commutator and the protection circuit mount pad.

In the above scheme, the axle sleeve is installed through the cotter key in the pivot outside of rotor, brush yoke and carbon brush subassembly fixed mounting are in the outside of axle sleeve.

In the above scheme, the brush yoke includes brush holder and brush sleeve, the brush sleeve suit is in the inside of brush holder, the top of brush sleeve is fixed with the brush holder through the fixed pin, the bottom of brush holder is equipped with the spacing groove, the carbon brush subassembly still includes spring and copper, carbon brush, spring, copper radially set gradually from the outside to the inside in the pivot, the carbon brush passes through spring and copper electric connection, the copper clamps in the spacing groove.

In the above scheme, the brush yoke includes brush holder and brush sleeve, the draw-in groove has been seted up to the bottom of brush holder, the intercommunication has been seted up to one side inner wall of brush holder the slot of draw-in groove, the brush sleeve suit is in the inside of brush holder, brush sleeve one side bottom is fixed with the fixture block, the fixture block with the draw-in groove joint, the bottom of brush holder is equipped with the spacing groove, the carbon brush subassembly still includes spring and copper, carbon brush, spring, copper set gradually from the extroversion in the footpath of pivot, the carbon brush passes through spring and copper electric connection, the copper clamps the spacing inslot.

In the above scheme, the carbon brush is in any one of a square block-shaped structure and a cylindrical structure.

In the above scheme, the protective cover is made for rubber, the protective cover is equipped with two at least on the motor casing.

In the above scheme, the circuit in the protection circuit mounting base is a freewheeling circuit.

Compared with the prior art, the invention has the beneficial effects that: the carbon brush assembly guides electric arcs generated by alternate on-off between the carbon brush and the coil connector lug to a protection circuit of the motor from inside to outside from the rotor, eliminates the commutation electric arcs generated when the motor works, realizes the arc-free commutation effect, ensures that the carbon brush has good conductive performance, and prolongs the service life of the motor. After the carbon brush is worn after long-time use, when the carbon brush needs to be replaced, the protective cover is opened, and then the commutator is moved away for a certain distance into the sliding groove by using a tool, so that the carbon brush is convenient to take out and replace.

Drawings

The disclosure of the present invention is illustrated with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:

FIG. 1 is a schematic view of the internal structure of the motor of the present invention;

FIG. 2 is a schematic structural view of a brush holder and a carbon brush assembly according to an embodiment of the invention;

FIG. 3 is a schematic view of a brush holder and a carbon brush assembly according to another embodiment of the present invention;

FIG. 4 is a schematic top view of the structure of FIG. 3;

FIG. 5 is a schematic view of the mounting position of the protective cover on the motor casing according to the present invention;

reference numbers in the figures: 1-a motor; 11-a rotor; 12-a stator core; 13-motor housing; 14-a protective cover; 15-a commutator; 16-a chute; 17-a shaft sleeve; 2-brush holder; 21-a brush holder; 22-brush sleeve; 23-a limiting groove; 24-a fixed pin; 25-a fixture block; 26-a slot; 27-a card slot; 3-a carbon brush assembly; 31-a carbon brush; 32-a spring; 33-copper plate; 4-protective circuit mounting seat.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described in detail with reference to the attached drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution to which the present invention relates.

According to the technical scheme of the invention, a plurality of alternative structural modes and implementation modes can be provided by a person with ordinary skill in the art without changing the essential spirit of the invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.

The technical solution of the present invention is further described in detail with reference to the accompanying drawings and examples.

Embodiment 1, as shown in fig. 1, a radial carbon brush apparatus includes a motor 1, and a rotor 11 and a stator core 12 installed in an inner cavity of the motor 1, wherein the rotor 11 is rotatably connected to a central axis of the motor 1 through a bearing, and the stator core 12 is fixed on an inner wall of a motor casing 13 of the motor 1. The bars of the rotor 11 rotate in the magnetic field of the stator core 12, the coils of the rotor 11 also cut the magnetic flux of the stator core 12 to generate current, and further to generate the magnetic field of the rotor 11, and the rotor 11 and the stator core 12 attract each other to rotate the output shaft of the motor 1. The brush holder 2, the carbon brush assembly 3 and the protective circuit mounting seat 4 are mounted on the outer side of the rotating shaft of the rotor 11. The method specifically comprises the following steps: the shaft sleeve 17 is installed on the outer side of the rotating shaft of the rotor 11 through a pin key, the shaft sleeve 17 is sleeved on the rotating shaft of the rotor 11, and the brush holder 2 and the carbon brush assembly 3 are fixedly installed on the outer side of the shaft sleeve 17.

The carbon brush assembly 3 includes a carbon brush 31, and this scheme can be realized if the carbon brush 31 is any one of a square block-shaped structure and a cylindrical structure in this embodiment.

Referring to fig. 2, the brush holder 2 includes a brush holder 21 and a brush sleeve 22, the brush sleeve 22 is sleeved inside the brush holder 21, the top of the brush sleeve 22 is fixed to the brush holder 21 by a fixing pin 24, and a limiting groove 23 is formed at the bottom of the brush holder 21. The carbon brush assembly 3 further comprises a spring 32 and a copper plate 33, the carbon brush 31, the spring 32 and the copper plate 33 are sequentially arranged from outside to inside in the radial direction of the rotating shaft, the carbon brush 31 is electrically connected with the copper plate 33 through the spring 32, and the copper plate 33 is clamped in the limiting groove 23. The carbon brush assembly 3 alternately switches on and off the carbon brush 31 and the coil connector lug to generate electric arcs, the electric arcs are guided into a protection circuit of the motor 1 from inside to outside from the rotor 11, the commutation electric arcs generated when the motor works are eliminated, the arc-free commutation effect is realized, and the carbon brush 31 is ensured to have good electric conduction performance.

The motor casing 13 is provided with a protective cover 14 through being provided with mounting holes, the protective cover 14 is made of rubber, the number of the protective covers 14 on the motor casing 13 is at least two, correspondingly, the brush holder 2 and the carbon brush component 3 are also at least two. Referring to fig. 5, three protective covers 14 are mounted on the motor housing 13 along the radial direction of the motor 1 on the motor housing 13.

The position of the inner wall of the motor shell 13, which is close to the protective cover 14, is provided with a sliding groove 16, a commutator 15 which is in sliding connection with the sliding groove 16 is installed in the sliding groove 16, the section of the commutator 15 can be made into a T shape, the transverse edge of the top of the commutator 15 is in sliding connection with the sliding groove 16, and the inner wall of the commutator 15 is in contact with the outer wall of the carbon brush 31 to realize electric conduction and is in sliding connection with the carbon brush 31. After the carbon brush 31 is worn after a long time of use, when the carbon brush 31 needs to be replaced, the protective cover 14 is opened, and then the commutator 15 is moved away from the sliding groove 16 by a tool, so that the carbon brush 31 is convenient to take out and replace.

The commutator 15 is electrically connected with a circuit in the protection circuit mounting base 4, and transmits the current transmitted by the rotor 11 through the carbon brush assembly 3 to a protection circuit in the motor, the specific circuit in the protection circuit mounting base 4 is a follow current circuit in the existing circuit, and the follow current circuit is used for providing a discharge path for the electric energy led out by the electric brush 31, so that the normal operation of the motor 1 is protected.

Embodiment 2, please refer to fig. 3 and 4, which is different from embodiment 1 in that the brush holder 2 includes a brush holder 21 and a brush sleeve 22, a slot 27 is formed at the bottom of the brush holder 21, a slot 26 communicated with the slot 27 is formed on an inner wall of one side of the brush holder 21, and the brush sleeve 22 is sleeved inside the brush holder 21. The bottom of one side of the brush sleeve 22 is fixed with a clamping block 25, when the brush sleeve 22 is installed, the clamping block 25 of the brush sleeve 22 is firstly placed into the brush sleeve 22 along the slot 26, and then the part with the clamping block 25 is positioned in the clamping slot 27 by rotating the brush sleeve 22, so that the clamping block 25 is clamped and fixed with the clamping slot 27. The bottom of the brush holder 21 is provided with a limiting groove 23, the carbon brush assembly 3 further comprises a spring 32 and a copper plate 33, the carbon brush 31, the spring 32 and the copper plate 33 are sequentially arranged from outside to inside in the radial direction of the rotating shaft, the carbon brush 31 is electrically connected with the copper plate 33 through the spring 32, and the copper plate 33 is clamped in the limiting groove 23.

In summary, in the carbon brush assembly 3 of the present invention, the arc generated by the alternate on-off between the carbon brush 31 and the coil connector is guided from the inside to the outside of the rotor 11 to the protection circuit of the motor 1, so as to eliminate the commutation arc generated during the operation of the motor, achieve the arc-free commutation effect, ensure the carbon brush 31 to have a good conductive performance, and prolong the service life of the motor 1. After the carbon brush 31 is worn after a long time of use, when the carbon brush 31 needs to be replaced, the protective cover 14 is opened, and then the commutator 15 is moved away from the sliding groove 16 by a tool, so that the carbon brush 31 is convenient to take out and replace.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.