WO2014073828A1

WO2014073828A1 - Current feeding device

Info

Publication number: WO2014073828A1
Application number: PCT/KR2013/009918
Authority: WO
Inventors: 이춘우
Original assignee: Lee Chun-Woo
Priority date: 2012-11-09
Filing date: 2013-11-05
Publication date: 2014-05-15

Abstract

A current feeding device according to the present invention reduces contact sound, lowers a frictional resistance, and increases a lifespan of a brush by enabling current feeding through a rolling motion while making line contact or point contact with a surface of a rotor or a rotating body.

Description

Energizing device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energizing device, and more particularly, to an energizing device for transmitting a current or an electric signal to a rotor or a rotating body in a stator or a fixed body.

As is known, in an industrial robot, an automatic packaging machine, a medical machine, a generator, and a motor, a current-carrying device is used to supply electric current or transfer electric signals between a stator or a stationary body and a rotor or a rotating body.

One example of the energizing apparatus is configured as shown in Fig.

That is, a brush 32 having a cubic shape is attached to the tip end of the brush spring 31 fixed to the terminal 30, and the current is converted by sliding contact with the commutator element 33, and rectification is performed. 34 is a rotor, 35 is a coil, 36 is an iron core, 37 is a stator case, and 38 is a magnet.

However, when friction occurs between the brush 32 and the commutator element 33 at the time of sliding contact, both of them cause a cutting phenomenon, so that the contact noise is increased, wear is generated, noise is increased, There is a problem.

SUMMARY OF THE INVENTION The present invention has a problem of providing a current-carrying device having a small noise and reduced wear of brushes and commutator elements and having a long life.

The present invention can solve the above problems by interposing a conductive brush rolling between the stator or the fixed body and the rotor or the rotating body in a resilient or linear manner.

According to the above-mentioned problem, since the conductive brush rolls in line or point contact with the stator or the fixed body and the rotor or the rotating body, the contact sound is reduced and the frictional resistance is lowered, .

1 is a view showing a motor having a conventional energizing device,

2 is a view showing a motor provided with a power supply apparatus according to the first embodiment of the present invention,

Fig. 3 is a detailed view of the motor-powered device of Fig. 2,

4 is a view showing a power supply device according to another embodiment of the first embodiment,

FIG. 5 is a detailed view of a motor current applying device according to a second embodiment of the present invention,

6 is a view showing a power supply device according to another embodiment of the second embodiment,

7 is a view showing a power supply apparatus according to a modification of the second embodiment,

FIG. 8 is a detailed view of a motor current applying apparatus according to a third embodiment of the present invention,

9 is a view showing a power supply device according to another embodiment of the third embodiment,

10 is a view showing an energizing device of a modified embodiment of the third embodiment, and Fig.

11 is a view showing a power supply device of another modified embodiment of the third embodiment;

The energizing apparatus according to the present invention includes: a rotor that circumscribes a commutator base on a rotating shaft; And a stator disposed with a predetermined gap with respect to the rotor, wherein the plurality of conductive commutator elements embedded in the outer circumferential surface of the commutator base; A plurality of conductive brushes each having a cylindrical shape and in which a plurality of conductive brushes come into line contact with each other in a circumferential direction of the rotary shaft in a state of rolling contact with the commutator element; A plurality of ball-like conductive members that are stacked in a plurality of layers in the radial direction of the rotating shaft, are adjacent to each other in a circumferential direction of the rotating shaft and are in point contact with each other, and are in point contact with a plurality of cylindrical conductive brushes brush; A conductive brush bracket rotatably mounting a plurality of cylindrical conductive brushes in point contact with a plurality of ball-shaped conductive brushes; And a terminal connected to the brush bracket via a conductive elastic piece supported by the stator and passing through the stator, wherein the plurality of conductive brushes in the form of a cylinder has a rotation center in a direction parallel to the rotation center axis of the rotation axis , And both ends of the plurality of conductive brushes are rotatably supported by the brush bracket (4).

(Example 1)

Hereinafter, a first embodiment according to the present invention will be described in detail with reference to FIG. 2 and FIG.

The energizing apparatus of the first embodiment will be described below as an example of a motor for convenience, and the energizing apparatus of the present invention can be applied not only to a motor but also to an industrial robot, an automatic packaging machine, and a medical machine.

In Fig. 2 the motor is indicated as 100.

2, the motor 100 includes a rotor iron core 6, a coil 7, a commutator base 8, and a rotor (not shown) that circumscribes the bush 9 One); A stator 10 including a permanent magnet 14 fixedly inscribed on the inner surface of the case 13 and having a predetermined gap with respect to the rotor 1; A pair of bearings (11, 12) of the stator (10) rotatably supporting the rotor (1) at both ends; Shaft bases (15, 16) for supporting the bearings (11, 12) at both ends of the stator (10); And an energizing device (50).

The electrification device (50) includes a plurality of conductive commutator segments (2) embedded in the outer circumferential surface of the commutator base (8); A ball-shaped conductive brush (3) in rolling contact with the commutator element (2) of the rotor (1); A conductive brush bracket (4) rotatably mounting the conductive brush (3); And a terminal 17 connected to the brush bracket 4 through the conductive elastic piece 18 supported on the shaft base 16 of the stator 10 and passing through the shaft base 16 .

3, three pieces of the commutator element 2 are embedded in the commutator base 8 so that the conductive brush 3 is partly inserted and linearly contacted with the commutator element 2, A recessed portion 31 is formed along the outer circumferential surface so as to prevent a step between the commutator elements 2 so that a recess 81 is formed in a part of the outer circumferential surface of the commutator element 8, Is formed.

The conductive brushes (3) are arranged in pairs and opposed to each other with the commutator base (8) interposed therebetween.

The brush bracket 4 is shaped so as to surround the upper half of the ball-shaped conductive brush 3. Between the brush bracket 4 and the conductive brush 3, the brush bracket 4, A plurality of conductive balls 41 interposed between the conductive brush 3 and the commutator element 3 so as to be in point contact with the conductive brush 3 so that when the conductive brush 3 rolls on the commutator element 2, So that the brush brackets 4 are energized.

The commutator element 2, the conductive brush 3, the plurality of conductive balls 41, the resilient piece 18 and the brush bracket 4 are made of bronze carbon or the like having conductivity.

The conductive brush 3 is in the form of a ball and is mounted on the brush bracket 4 via a plurality of balls 41 so as to be rotatable. And is in rolling contact with the brush bracket 4 in point contact. As a result, the contact sound is reduced, the noise is lowered, the frictional resistance is lowered and the wear is suppressed, so that the service life of the conductive brush 3 and the commutator element 2 is prolonged.

(Example 2)

In the power supply apparatus of the first embodiment, a concave portion is formed along the outer circumferential surface of the rotor so that the conductive brush can be partially inserted and rotated in line contact with the rotor, and the brush bracket has an upper half of the conductive brush And a plurality of conductive balls are interposed between the brush bracket and the conductive brush. However, in a state where a plurality of conductive balls are arranged in one layer, the conductive ball is brought into sliding contact with the rotor However, since the plurality of conductive balls are pressed only inward in the radial direction by the elastic piece, the point contact pressure is still large, so that noise reduction and reduction of wear between the conductive brush and the commutator element may not be conspicuous.

Theoretically, in view of increasing the cross-sectional area of the conductor or increasing the number of strands as the magnitude of the current is larger or the frequency is higher, the energizing apparatus of the first embodiment has only one ball-shaped conductive brush So that there is a limit in increasing the magnitude of the current given to the rotor in the stator.

The energizing apparatus of the second embodiment according to the present invention in consideration of this point will be described in detail below with reference to Figs. 2 and 5.

The electrification device (50) includes a plurality of conductive commutator segments (2) embedded in the outer circumferential surface of the commutator base (8); A plurality of ball-shaped conductive brushes (3) rolling on the commutator segments (2) of the rotor (1); A conductive brush bracket (4) rotatably mounting the plurality of conductive brushes (3); The stator 10 is connected to the brush bracket 4 via the conductive elastic piece 18 supported on the shaft base 16 of the stator 10, (17).

As shown in Fig. 5, three of the commutator segments 2 are embedded in the commutator base 8 so as to prevent the step between the commutator segments 2 from occurring.

The plurality of conductive brushes (3) are formed as a pair and arranged so as to face each other with the commutator base (8) interposed therebetween.

Wherein the brush bracket 4 is configured to surround the plurality of conductive brushes 3 and the plurality of conductive brushes 3 are stacked in the brush bracket 4 in the radial direction of the rotary shaft 5, The plurality of conductive brushes 3 are in point contact between a plurality of conductive brushes 3 and point contact is made between a plurality of conductive brushes 3 adjacent to the brush bracket 4 and the brush bracket 4, The brush bristles 4 and the plurality of conductive brushes 3 are brought into sliding contact with each other at the time of rolling motion on the commutator element 2. [

The plurality of conductive brushes 3 are arranged such that the diameter of the plurality of conductive brushes 3 disposed radially outward of the rotary shaft 5 is smaller than the diameter of the plurality of conductive brushes 3 disposed radially inwardly of the rotary shaft 5 .

In order to stably accommodate the plurality of conductive brushes 3 that are in point contact with the commutator element 2 in the brush bracket 4, the brush bracket 4 is provided with a plurality of conductive brushes 3 radially inward of the rotary shaft 5 And a plurality of conductive brushes (41) are provided in the mesh net (41) so as to be in point contact with the commutator element (2) for each hole provided in the mesh net (41) (3) are in contact with the edge portions of the respective holes provided in the mesh net (41) in a state of being in point contact with the commutator segments (2) through the holes.

The commutator element 2, the plurality of conductive brushes 3, the resilient piece 18 and the brush bracket 4 are made of conductive phosphorus, copper, carbon, or the like.

The elastic piece 18 is connected to the brush bracket 4 to elastically press the brush bracket 4 in the second embodiment. However, the second embodiment is not limited to this, 7, the brush bracket 4 is connected to the terminal 17, and the brush bracket 4 is provided in the brush bracket 4 between the conductive pressure plate 42 and the mesh net 41, Wherein a plurality of conductive brushes (3) are interposed and an elastic piece (18) for pressing the pressing plate (42) radially inward of the rotary shaft (5) is interposed between the pressing plate (42) and the brush bracket .

At this time, the pressure plate 42 should also be made of a conductive material.

According to the above configuration, since the plurality of conductive brushes 3 are rotatably mounted on the brush bracket 4 in a point contact state, the conductive brushes 3 roll in point contact on the commutator element 2, The diameter of the plurality of conductive brushes 3 disposed on the radially outer side of the rotary shaft 5 is smaller than the diameter of the plurality of conductive brushes 3 arranged radially inward of the

rotary shaft

5, 18 are transmitted to a plurality of conductive brushes 3 having a small diameter and the plurality of conductive brushes 3 having a small diameter are caused to transmit the transmitted elastic force to a plurality of adjacent conductive brushes 3) and at least two points in contact with the plurality of conductive brushes (3) of large diameter in a direction not parallel to the radial direction of the rotary shaft (5) Since the contact brushes 3 are in point contact with each other with a small elastic force between the brushes 3, the contact noise is reduced, noise is lowered, friction resistance is lowered and wear is suppressed, The life of the commutator segment 2 becomes long.

(Example 3)

Hereinafter, a third embodiment according to the present invention will be described in detail with reference to FIG. 2 and FIG.

The energizing device (50) of the third embodiment includes a plurality of conductive commutator segments (2) embedded in the outer circumferential surface of the commutator base (8); A plurality of conductive brushes (3) in rolling contact with the commutator element (2) of the rotor (1); A conductive brush bracket (4) rotatably mounting the plurality of conductive brushes (3); And a terminal 17 connected to the brush bracket 4 through the conductive elastic piece 18 supported on the shaft base 16 of the stator 10 and passing through the shaft base 16 .

As shown in FIG. 8, the commutator segments 2 are embedded in the commutator base 8 so that no step is formed between the commutator segments 2.

The brush brackets 4 are arranged in a pair and opposed to each other with the commutator base 8 interposed therebetween.

Each of the plurality of conductive brushes (3) has a cylindrical shape and has a rotation center axis in a direction parallel to the rotation center axis of the rotation axis (5).

The brush bracket 4 is configured to surround the plurality of conductive brushes 3 and the plurality of conductive brushes 3 are arranged in the brush bracket 4 in a plurality of layers in the radial direction of the rotary shaft 5 And a plurality of conductive brushes (3) are brought into line contact with a plurality of conductive brushes (3) in a circumferential direction of the rotary shaft (5) so that both ends of the plurality of conductive brushes .

A plurality of conductive brushes (3) arranged radially outwardly of the rotary shaft (5) among the plurality of conductive brushes (3) are in line contact with the brush bracket (4) and radially inward of the rotary shaft The plurality of conductive brushes 3 disposed in line contact with the commutator element 2 so that when the conductive brushes 3 roll in rolling on the commutator element 2, the plurality of conductive brushes 3 are brought into sliding contact with each other So that the terminal 17 and the commutator element 2 are energized.

The brush bracket 4 is made of a conductive material only in the top end portion 4a that comes in line contact with the plurality of conductive brushes 3 disposed radially outwardly of the rotary shaft 5 and the top end portion 4a Is connected to the elastic piece (18) and extends in the radial direction of the rotating shaft (5) by the elastic piece (18) in a state of extending in a direction parallel to the circumference of the commutator element (2) .

The commutator element 2, the plurality of conductive brushes 3, the resilient piece 18 and the brush housing 4 are made of conductive phosphorus or copper carbon.

According to the above configuration, since the plurality of conductive brushes 3 are rotatably mounted on the brush bracket 4 in a state of being linearly contacted with the brush bracket 4, The elastic force of the elastic piece 18 in the radial direction of the rotary shaft 5 is dispersed in the non-radial direction, and the contact area where the electric current can flow can be increased in a state where the abrasion resistance is lowered The noise is reduced and the amount of electric current to be energized can be increased and the service life of the conductive brushes 3 and the commutator segments 2 is prolonged.

In the third embodiment, the elastic piece 18 is connected to the brush bracket 4 from the outside to elastically press the brush bracket 4. However, the present invention is not limited to this, As an alternate embodiment, the energizing device 50 can be configured as follows, as shown in Fig.

That is, the brush bracket 4 is connected to the terminal 17 and the brush bracket 4, which is opposite to the rotation axis axis of the rotation shaft 5, A plurality of rectangular slit-shaped through holes 4b are formed at regular intervals and a plurality of trunnions 3a formed at both ends of the plurality of conductive brushes 3 are formed in the rectangular slit-shaped through- (5a) of the rotary shaft (5) in a radial direction of the rotary shaft (5), and the upper part of the ceiling part (4a) of the brush bracket (4) and the plurality of conductive brushes The energizing device 50 may be configured by inserting the conductive pressure plate 42 with a plurality of elastic pieces 18 interposed between a plurality of conductive brushes 3 disposed on the conductive brushes 3.

The pressure plate 42 and the ceiling portion 4a of the brush bracket 4 should be parallel to the circumference of the commutator element 2 or the commutator base 8, Direction.

In the third embodiment and its modification, all of the plurality of conductive brushes 3 are described as having a cylindrical shape. However, the present invention is not limited to this, and as another modification example, , A plurality of conductive brushes (30) other than a plurality of conductive brushes (3) disposed radially inward of the rotary shaft (5) are ball-shaped, and a plurality of conductive brushes The cylindrical conductive brush 3 and the wall portion of the brush bracket 4 and the cylindrical conductive brush 3 are connected to the ceiling portion 4a of the brush bracket 4 and the cylindrical conductive brush 3, And the conductive pressure plate (42).

On the other hand, the energizing apparatus 50 of the first to third embodiments may be applied to devices other than the motor (industrial robots, automatic packaging machines, medical machines, generators).

As shown in Fig. 4, the energizing device 50 of the first embodiment is fixed to the fixed body 10-1 so as to supply electric current to the conductive rotating body in the fixed body, And is in contact with the rotating body 1-1.

The energizing device 50 of the first embodiment has the conductive rotating body 1-1 and the ball-shaped conductive brush (not shown) interposed between the fixed body 10-1 and rolling contact with the rotating body 1-1 3); A conductive brush bracket (4) rotatably mounting the conductive brush (3); And a terminal 17 connected to the brush bracket 4 via an elastic piece 18 supported by the fixing body 10-1.

A concave portion 81 is formed along the outer circumferential surface of the rotating body 1-1 so that the conductive brush 3 is partly inserted into the rotating body 1-1 so that the conductive brush 3 can roll while being in line contact with the rotating body 1-1.

The brush bracket 4 has a shape to surround the upper half of the conductive brush 3 and a plurality of conductive balls 41 are interposed between the brush bracket 4 and the conductive brush 3 .

According to the above configuration, since the conductive brush 3 is in the form of a ball and is mounted on the brush bracket 4 with a plurality of balls 41 interposed therebetween, And is in rolling contact with the brush bracket 4 in point contact. Therefore, the contact sound is reduced, noise is lowered, friction resistance is lowered, and wear is suppressed, so that the service life of the conductive brush 3 is prolonged.

The power supply device 50 of the second embodiment is fixed to the fixed body 10-1 as shown in Fig. 6 in order to supply electric current to the conductive rotating body or to transmit an electric signal from the fixed body And is in contact with the conductive rotating body 1-1.

According to the above-described configuration, since the contact sound is made smaller, the noise is lowered, the frictional resistance is lowered and the wear is suppressed, so that the life of the plurality of conductive brushes 3 becomes longer do.

The energizing device 50 of the third embodiment is fixed to the fixed body 10-1 as shown in Fig. 9 in order to supply electric current to the conductive rotating body or to transmit an electric signal in the fixed body And is in contact with the conductive rotating body 1-1.

According to the above-described configuration, since the contact sound is made smaller and the noise is lowered, the current passing amount can be increased, and the number of the conductive brushes 3 and the commutator element 2 can be increased, The lifetime of the battery pack becomes longer.

Claims

A rotor (1) circumscribing the commutator base (8) to the rotary shaft (5); And

A power supply device (50) provided in a motor including a stator (10) having a certain gap with respect to the rotor (1)

A plurality of conductive commutator segments (2) embedded in an outer peripheral surface of the commutator base (8);

A ball-shaped conductive brush 3 in rolling contact with the commutator element 2;

A conductive brush bracket (4) rotatably mounting the conductive brush (3); And

And a terminal (17) connected to the brush bracket (4) via a conductive elastic piece (18) supported by the stator (10) and passing through the stator (10)

A plurality of the commutator segments 2 are embedded in the commutator base 8 so that the conductive brushes 3 are partly inserted into the commutator segments 2 so that they are in line contact with the commutator segments 2, A concave portion 81 is formed in a part of the outer circumferential surface of the commutator element 8 positioned between the commutator elements 2 so as not to cause a step between the commutator elements 2, ,

The brush bracket 4 has a shape that surrounds the upper half of the ball-shaped conductive brush 3. A plurality of conductive balls 41 are interposed between the brush bracket 4 and the conductive brush 3 And the power supply unit is connected to the power supply unit.
The method according to claim 1,

Wherein the conductive brushes (3) are arranged in a pair and are arranged so as to face each other with the commutator base (8) interposed therebetween.
In the power supply device (50) fixed to the fixed body (10-1) in contact with the conductive rotating body (1-1)

A ball-shaped conductive brush (3) in rolling contact with the rotating body (1-1);

A conductive brush bracket (4) rotatably mounting the conductive brush (3); And

And a terminal (17) connected to the brush bracket (4) via a conductive elastic piece (18) supported by the fixing body (10-1)

A concave portion 81 is formed along the outer circumferential surface of the rotating body 1-1 so that the conductive brush 3 is partly inserted and is allowed to roll while being in line contact with the rotating body 1-1,

The brush bracket 4 has a shape that surrounds the upper half of the conductive brush 3 and a plurality of conductive balls 41 are interposed between the brush bracket 4 and the conductive brush 3 .
A rotor (1) circumscribing the commutator base (8) to the rotary shaft (5); And

A power supply device (50) provided in a motor including a stator (10) having a certain gap with respect to the rotor (1)

A plurality of conductive commutator segments (2) embedded in an outer peripheral surface of the commutator base (8);

A plurality of ball-shaped conductive brushes (3) in rolling contact with the commutator element (2);

A conductive brush bracket (4) mounted rotatably on the conductive brush (3) and in point contact with the plurality of conductive brushes (3); And

And a terminal (17) connected to the brush bracket (4) via a conductive elastic piece (18) supported by the stator (10) and passing through the stator (10)

A plurality of the commutator segments (2) are embedded in the commutator base (8) so that no step is present between the commutator segments (2)

Wherein the plurality of conductive brushes (3) are stacked in the radial direction of the rotary shaft (5) so as to be in point contact with the plurality of conductive brushes (3), and the brush bristles Is also in point contact with a plurality of conductive brushes (3) and the brush bracket (4)

Wherein a plurality of conductive brushes (3) arranged radially outward of the rotary shaft (5) have a diameter larger than a diameter of the plurality of conductive brushes (3) arranged radially inward of the rotary shaft (5) Is smaller than the diameter of the power supply.
A rotor (1) circumscribing the commutator base (8) to the rotary shaft (5); And

A power supply device (50) provided in a motor including a stator (10) having a certain gap with respect to the rotor (1)

A plurality of conductive commutator segments (2) embedded in an outer peripheral surface of the commutator base (8);

A plurality of ball-shaped conductive brushes (3) in rolling contact with the commutator element (2);

A conductive brush bracket (4) mounted rotatably on the conductive brush (3) and in point contact with the plurality of conductive balls (3); And

And a terminal (17) supported by the stator (10) and connected to the brush bracket (4) and passing through the stator (10)

A plurality of the commutator segments (2) are embedded in the commutator base (8) so that no step is present between the commutator segments (2)

Wherein the plurality of conductive brushes (3) are stacked in the radial direction of the rotary shaft (5) so as to be in point contact with the plurality of conductive brushes (3), and the brush bristles Is also in point contact with a plurality of conductive brushes (3) and the brush bracket (4)

A conductive pressure plate (42) is interposed between the brush bracket (4) and the plurality of conductive brushes (3)

A conductive elastic piece 18 for pressing the pressing plate 42 in a radially inward direction of the rotary shaft 5 is interposed between the pressing plate 42 and the brush bracket 4,

Wherein a diameter of a plurality of conductive brushes (3) arranged radially outwardly of a rotary shaft (5) is larger than a diameter of a plurality of conductive brushes (3) arranged radially inwardly of the rotary shaft (5) Is smaller than a predetermined value.
The method according to claim 4 or 5,

Wherein the plurality of conductive brushes (3) are formed as a pair and arranged so as to face each other with the commutator base (8) interposed therebetween.
The method according to claim 4 or 5,

The brush bracket 4 is provided with a plurality of conductive brushes 3 which are brought into point contact with the commutator element 2 in order to accommodate the conductive brushes 3 in the brush bracket 4. The bristles 4, A mesh net 41 is fixedly attached to the end of the bracket 4,

A plurality of conductive brushes 3 which are in point contact with the commutator element 2 are disposed for each hole provided in the mesh net 41 and a part of the conductive brushes 3 penetrate through the hole, And the end portions of the respective holes provided in the mesh net (41) are in point contact with each other in point contact.
In the power supply device (50) fixed to the fixed body (10-1) in contact with the conductive rotating body (1-1)

A plurality of conductive brushes (3) in a rolling contact with the rotating body (1-1) in a ball shape;

A conductive brush bracket (4) rotatably mounted on the plurality of conductive brushes (3) and in point contact with the plurality of conductive brushes (3); And

And a terminal (17) connected to the brush bracket (4) via a conductive elastic piece (18) supported by the fixing body (10-1)

The brush bracket (4) has a shape to surround a part of the outer peripheral surface of the rotating body (1-1)

The plurality of conductive brushes 3 are stacked in the radial direction of the rotating body 1-1 so as to be in point contact with the plurality of conductive brushes 3 and the brush brackets 4 (3) and the brush bracket (4) adjacent to each other,

In the plurality of conductive brushes (3), a plurality of conductive brushes (3) arranged radially outward of the rotating body (1-1) are arranged in a radial direction of the rotating body Is smaller than the diameter of the conductive brushes (3) And the stator and the rotor.
In the power supply device (50) fixed to the fixed body (10-1) in contact with the conductive rotating body (1-1)

A plurality of conductive brushes (3) in a rolling contact with the rotating body (1-1) in a ball shape;

A conductive brush bracket (4) rotatably mounted on the plurality of conductive brushes (3) and in point contact with the plurality of conductive brushes (3); And

And a terminal (17) supported by the fixing body (10-1) and connected to the brush bracket (4) and passing through the fixing body (10-1)

The plurality of conductive brushes 3 are stacked in the radial direction of the rotating body 1-1 so as to be in point contact with the plurality of conductive brushes 3 and the brush brackets 4 (3) and the brush bracket (4) adjacent to each other,

A conductive pressure plate (42) is interposed between the brush bracket (4) and the plurality of conductive brushes (3)

A conductive elastic piece 18 for pressing the pressing plate 42 in a radially inward direction of the rotating body 1-1 is interposed between the pressing plate 42 and the brush bracket 4,

A plurality of conductive brushes (3) arranged radially outward of the rotating body (1-1) have a diameter of a plurality of conductive brushes (3) arranged radially inward of the rotating body (1-1) Is smaller than the diameter of the conductive brush (3) And a power supply unit for supplying power to the power supply unit.
10. The method according to claim 8 or 9,

In order to accommodate a plurality of conductive brushes (3) to be in point contact with the rotating body (1-1) in the brush bracket (4), the brush bracket (4) A mesh net 41 is fixedly inserted into an end portion of the brush bracket 4 disposed inside,

A plurality of conductive brushes 3 which are in point contact with the rotating body 1-1 are disposed for each hole provided in the mesh net 41, And the end portions of the respective holes provided in the mesh net (41) are brought into point contact with each other.
A rotor (1) circumscribing the commutator base (8) to the rotary shaft (5); And

A power supply device (50) provided in a motor including a stator (10) having a certain gap with respect to the rotor (1)

A plurality of conductive commutator segments (2) embedded in an outer peripheral surface of the commutator base (8);

(2) by rolling in a radial direction of the rotating shaft (5), and a plurality of adjacent layers are arranged in the circumferential direction of the rotating shaft (5) A plurality of conductive brushes (3) in a cylindrical shape to be brought into contact;

A conductive brush bracket (4) rotatably mounting the conductive brush (3); And

And a terminal (17) connected to the brush bracket (4) and passing through the stator (10)

The plurality of conductive brushes (3) have a rotation center axis in a direction parallel to the rotation center axis of the rotation axis (5)

A plurality of rectangular slit-shaped through holes 4b are formed in both side wall portions of the brush bracket 4 facing the axis of rotation axis 5 of the rotating shaft 5 at regular intervals in the circumferential direction of the rotating shaft 5 And,

A biaxial 3a formed at both ends of the plurality of conductive brushes 3 is rotatably passed through the rectangular slit-shaped through hole 4b so as to be movable in the radial direction of the rotor 1,

A plurality of elastic pieces 18 are provided between a ceiling portion 4a of the brush bracket 4 and a plurality of conductive brushes 3 arranged radially outwardly of the rotary shaft 5 among the plurality of conductive brushes 3. [ The conductive pressure plate 42 is inserted through the through-

Wherein a plurality of conductive brushes (3) arranged radially outwardly of the rotary shaft (5) among the plurality of conductive brushes (3) are in line contact with the conductive pressure plate (42).
A rotor (1) circumscribing the commutator base (8) to the rotary shaft (5); And

A power supply device (50) provided in a motor including a stator (10) having a certain gap with respect to the rotor (1)

A plurality of conductive commutator segments (2) embedded in an outer peripheral surface of the commutator base (8);

A plurality of conductive brushes (3) of a cylindrical shape, which are in line contact with each other while being adjacent to each other in a circumferential direction of the rotary shaft (5) in a state of rolling contact with the commutator element (2);

Wherein the plurality of conductive brushes (3) are stacked in a plurality of layers in the radial direction of the rotary shaft (5), and are adjacent to each other in a circumferential direction of the rotary shaft (5) A plurality of conductive brushes 30 in the form of a ball;

A conductive brush bracket (4) which rotatably mounts a plurality of cylindrical conductive brushes (3) and makes point contact with a plurality of ball - like conductive brushes (30); And

And a terminal (17) connected to the brush bracket (4) via a conductive elastic piece (18) supported by the stator (10) and passing through the stator (10)

The plurality of cylindrical conductive brushes (3) have a rotation center axis in a direction parallel to the rotation center axis of the rotation axis (5)

Wherein both ends of the plurality of conductive brushes (3) are rotatably supported by the brush bracket (4).
A rotor (1) circumscribing the commutator base (8) to the rotary shaft (5); And

A power supply device (50) provided in a motor including a stator (10) having a certain gap with respect to the rotor (1)

A plurality of conductive commutator segments (2) embedded in an outer peripheral surface of the commutator base (8);

A plurality of conductive brushes (3) of a cylindrical shape, which are in line contact with each other while being adjacent to each other in a circumferential direction of the rotary shaft (5) in a state of rolling contact with the commutator element (2);

Wherein the plurality of conductive brushes (3) are stacked in a plurality of layers in the radial direction of the rotary shaft (5), and are adjacent to each other in a circumferential direction of the rotary shaft (5) A plurality of conductive brushes 30 in the form of a ball;

A conductive brush bracket (4) which rotatably mounts a plurality of cylindrical conductive brushes (3) and makes point contact with a plurality of ball-shaped conductive brushes (3); And

And a terminal (17) connected to the brush bracket (4) and passing through the stator (10)

The plurality of cylindrical conductive brushes (3) have a rotation center axis in a direction parallel to the rotation center axis of the rotation axis (5)

A plurality of rectangular slit-shaped through holes 4b are formed in both side wall portions of the brush bracket 4 facing the axis of rotation axis 5 of the rotating shaft 5 at regular intervals in the circumferential direction of the rotating shaft 5 And,

A diaphragm 3a formed at both ends of the cylindrical plurality of conductive brushes 3 is rotatably inserted into the rectangular slit-shaped through hole 4b so as to be movable in the radial direction of the rotor 1 ,

Characterized in that a conductive presser plate (42) is inserted between a ceiling portion (4a) of the brush bracket (4) and a plurality of ball-like conductive brushes (30) via a plurality of elastic pieces (18) .
14. The method according to any one of claims 11 to 13,

Wherein the brush brackets (4) are arranged in a pair and are disposed so as to face each other with the rotor (1) interposed therebetween.
In the power supply device (50) fixed to the fixed body (10-1) in contact with the conductive rotating body (1-1)

(1) are laminated in a radial direction of the rotating body (1 - 1) in a state of rolling contact with the rotating body (1 - 1) A plurality of conductive brushes (3) of a cylindrical shape adjacent to each other in a line to be in line contact with each other;

A conductive brush bracket (4) rotatably mounting the conductive brush (3); And

And a terminal (17) connected to the brush bracket (4)

The plurality of conductive brushes (3) have a rotation center axis in a direction parallel to the rotation center axis of the rotating body (1-1)

A plurality of rectangular slit-shaped through-holes (not shown) are formed in both side wall portions of the brush bracket 4 facing the rotational axis axis of the rotating body 1-1 at regular intervals in the circumferential direction of the rotating body 1-1. A hole 4b is formed,

A diaphragm 3a formed at both ends of the plurality of conductive brushes 3 is rotatably and slidably inserted into the rectangular slit-shaped through hole 4b so as to be movable in the radial direction of the rotary body 1-1 ,

A plurality of conductive brushes 3 are arranged between a ceiling portion 4a of the brush bracket 4 and a plurality of conductive brushes 3 arranged radially outwardly of the rotary body 1-1 among the plurality of conductive brushes 3. [ The conductive pressure plate 42 is inserted through the through hole 18,

Wherein a plurality of conductive brushes (3) arranged radially outwardly of the rotary body (1-1) among the plurality of conductive brushes (3) are in line contact with the conductive pressure plate (42).
In the power supply device (50) fixed to the fixed body (10-1) in contact with the conductive rotating body (1-1)

A plurality of conductive brushes (3) of a cylindrical shape, which are in line contact with each other while being adjacent to each other in a circumferential direction of the rotating body (1-1) in a state of rolling contact with the rotating body (1-1);

Are laminated in a plurality of layers in the radial direction of the rotating body (1-1), a plurality of the brushes are adjacent to each other in the circumferential direction of the rotating body (1-1) and are in point contact with each other, and the plurality of conductive brushes A plurality of ball-shaped conductive brushes 30 which are brought into point contact with the conductive brushes 3;

A conductive brush bracket (4) which rotatably mounts a plurality of cylindrical conductive brushes (3) and makes point contact with a plurality of ball - like conductive brushes (30); And

And a terminal 17 connected to the brush bracket 4 via a conductive elastic piece 18 supported by the fixture 10-1 and passing through the fixture 10-1,

The plurality of cylindrical conductive brushes (3) have a rotation center axis in a direction parallel to the rotation center axis of the rotating body (1-1)

Wherein both ends of the plurality of conductive brushes (3) are rotatably supported by the brush bracket (4).
In the power supply device (50) fixed to the fixed body (10-1) in contact with the conductive rotating body (1-1)

A plurality of conductive brushes (3) of a cylindrical shape, which are adjacent to each other in a circumferential direction of the rotating body (1-1) in a state of rolling contact with the rotating body (1-1) and in line contact with each other;

Wherein a plurality of conductive brushes are stacked in a plurality of layers in the radial direction of the rotating body and a plurality of the brushes are adjacent to each other in a circumferential direction of the rotating body and are in point contact with each other, A plurality of conductive brushes 30 in the form of a ball which are in point contact with the conductive brushes 3;

A conductive brush bracket (4) which rotatably mounts a plurality of cylindrical conductive brushes (3) and makes point contact with a plurality of ball-shaped conductive brushes (3); And

And a terminal (17) connected to the brush bracket (4)

The plurality of cylindrical conductive brushes (3) have a rotation center axis in a direction parallel to the rotation center axis of the rotating body (1-1)

A plurality of rectangular slit-shaped through-holes (not shown) are formed in both side wall portions of the brush bracket 4 facing the rotational axis axis of the rotating body 1-1 at regular intervals in the circumferential direction of the rotating body 1-1. A hole 4b is formed,

A pair of cylindrical brushes 3 are inserted into the rectangular slit-shaped through holes 4b so that the two shafts 3a formed at both ends of the cylindrical conductive brushes 3 can be rotated and moved in the radial direction of the rotating body 1-1 And,

Characterized in that a conductive presser plate (42) is inserted between a ceiling portion (4a) of the brush bracket (4) and a plurality of ball-like conductive brushes (30) via a plurality of elastic pieces (18) .