KR920000200Y1 - Current collectors - Google Patents

Abstract

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Description

Current collector

1 is an exploded front view showing an embodiment of the present invention.

FIG. 2 is a cross sectional view along line II-II of the embodiment of FIG. 1. FIG.

3 is a cross-sectional view showing a state in which the embodiment of FIG. 1 is assembled.

4 is a cross-sectional view showing a state in which two embodiments of FIG. 1 are combined and connected.

5 is an exploded front view showing a second embodiment of the present invention.

6 is a perspective view showing a metal brush used in the third embodiment of the present invention.

FIG. 7 is a front view showing a state in which the metal brush shown in FIG. 6 is fixed to a holder. FIG.

8 is a front view showing a metal brush used in the fourth embodiment of the present invention.

9 is a sectional view of an example of a conventional current collector device.

FIG. 10 is a front view showing an exploded state of an example of the conventional current collector of FIG. 9; FIG.

* Explanation of symbols for main parts of drawing

1a, 1b: annular electrodes 2a, 2b, 22a,... 22d, 32,42: Metal Brush

3: annular electrode holder 4: metal brush holder

7,27,37,47: Null 16: Coil spring

The present invention relates to a current collector device for conducting a current between a rotating part and a stop part.

9 is a sectional view of an example of a conventional current collector device. In Fig. 9, the inner annular electrode 1a and the outer annular electrode 1b are provided in the annular electrode holder 3. An axial rod portion 3a is formed at the center of the annular electrode holder 3. The metal brush 2a is in contact with the inner annular electrode 1a, and the metal brush 2b is in contact with the outer annular electrode 1b. The metal brushes 2a and ab are fixed to the metal brush holder 4. The cylindrical part 4a is formed in the center part of this metal brush holder, and this cylindrical part 4a is fitted to the shaft rod part 3a of the annular electrode holder 3 so that rotation is possible. Four holes 3b are provided at the edge of the annular electrode holder 3.

The cover 5 is fixed on the metal brush holder 4, by which the metal brushes 2a and 2b are pressed against the corresponding annular electrodes 1a and 1b, respectively. have. The opening part is formed in the center part of this cover 5. At the outer periphery of the cover 5, a hole 5a is provided at a position corresponding to the hole 3b of the annular electrode holder 3. A fastener 6 is passed through the hole 3b and the hole 5a, and the cover 5 and the annular electrode holder 3 are fixed by the fastener 6.

FIG. 10 is a front view of the annular electrode holder 3 and the metal brush holder 4 constituting the conventional current collector of FIG. 9 viewed from the inside to the outside, respectively. In FIG. 10, each metal brush 2a, 2b fixed to the metal brush holder 4 has two tip parts, and this tip part protrudes in a hemispherical shape. These tips are arranged so as to be located when they are respectively superimposed on the corresponding annular electrodes 1a and 1b of the annular electrode holder 3. The metal brushes 2a and 2b are made of a metal having elasticity, and when the metal brushes 2a and 2b overlap with the annular electrodes 1a and 1b, they are in contact with the corresponding annular electrode by the elasticity.

Returning to FIG. 9, the operation when the conventional current collector device rotates will be described. The metal brush holder 4 rotates on the shaft rod part 3a of the annular electrode holder 3. In this rotation, the metal brushes 2a and 2b slide and slide while contacting the corresponding annular electrodes 1a and 1b, respectively. Contact between the annular electrodes 1a and 1b and the metal brushes 2a and 2b is maintained by the elasticity of the metal brushes 2a and 2b itself. By this contact, electric current can be conducted between the metal brush which is a rotating part and the annular electrode which is a stop part.

However, as described above, in the conventional and current collector devices, the metal brush is left on the annular electrode due to its elasticity. Therefore, when the elasticity of the metal brush itself weakens, there exists a problem that contact with an annular electrode will become bad. In addition, when the elasticity of the metal brush is weakened, the rotation of the metal brush holder holding the metal brush is wobbly, causing further deterioration of the contact state.

In addition, the conventional current collector has a problem in that it cannot be used for a long time because the contact state becomes inferior when the elasticity of the metal brush becomes weak and the use becomes impossible. Therefore, it is an object of the present invention to provide a current collector having high safety, which can be used for a long period of time, because the contact state between the annular electrode and the metal brush is always good.

The current collector of the present invention maintains a contact between the annular electrode made of gold wood, the metal brush provided to contact the convex part on the surface of the annular electrode which is substantially orthogonal to the rotation axis of the rotating part, and the contact between the annular electrode and the metal brush. It is provided with an additional means installed to.

In the current collector of the present invention, additional means are provided to maintain contact between the annular electrode and the metal brush. Therefore, the contact between the annular electrode and the metal brush is not caused by the elasticity of the metal brush as in the prior art, but is maintained by additional means provided separately.

1 is an exploded front view showing an embodiment of the present invention. In FIG. 1, the inner side which overlaps the annular electrode holder 3 and the metal brush holder 4 is made into the front, respectively. 2 is a cross-sectional view taken along the line II-II of FIG. 1. The cylindrical protrusion 13 is provided in the center part of the annular electrode holder 3, and the groove 15 is formed in the edge part of this protrusion part. An inner annular electrode 1a is provided around the protruding portion 13, and an outer annular electrode 1b is provided on the outer side thereof. Part of the annular electrodes 1a and 1b of the annular electrode holder 3 is provided with holes 10 and 11 for connecting a connection cord to each of the annular electrodes 1a and 1b. Is installed.

In the center part of the metal brush holder 4, the indentation hole 12 of the magnitude | size which can depressurize the protrusion part 13 of the annular electrode hole diagram 3 is formed. An inner metal brush 2a is provided around the fitting hole 12, and an outer metal brush 2b is provided on the outside thereof. In each metal brush 2a, 2b, the concave part 7 is formed in the position disperse | distributed to four directions centering on the rotation axis. On a part of the part which each metal brush 2a, 2b of the metal brush holder 4 fixes. Holes 8 and 9 for connecting the connection cords to the respective metal brushes 2a and 2b are laid. The coil spring bearing portion 14 for receiving the coil spring around the intake hole 12 is planetary on the surface opposite to the overlapping side of the intake hole 12 of the metal brush holder 4. In assembling the annular electrode holder 3 and the metal brush holder 4, the projection 13 of the annular electrode holder 3 is fitted into the fitting hole 12 of the metal brush holder 4. The assembled state is shown in FIG. 3 in sectional view.

In FIG. 3, the coil spring 16 as an additional means is passed through the protruding portion 13 of the annular holder 3. On the other hand, the coil spring bearing part 14 of the metal brush holder 4 is supported. The other side of the coil spring 16 is supported by the high bottom wheel 18 fitted into the groove 15 via the coil spring press 17. By this coil spring 16 as an additional means. The metal brush holder 4 is pressed against the annular electrode holder 3. In this embodiment, since the height of the concave portion 7 formed in the metal brushes 2a and 2b is increased, the gap (between the metal brush holder 4 and the annular holder 3) is increased. 19) is formed. Even if such a gap 19 is present, the metal brush holder 4 is pushed against the annular electrode holder 3 by the coil spring 16. The annular electrodes 1a and 1b and the metal brushes 2a and 2b are always in good contact. In addition, since the metal brush uncoated blade 4 is always pushed by the coil spring 16, it does not rotate whistling at the time of rotation.

The metal brush 2a is again used for a long time. Even if the elasticity of (2b) is weakened. Since it is always pushed by the coil spring 16 as an additional means, since the clearance 19 between the annular electrode holder 3 and the metal brush holder 4 becomes narrow, a good contact state can always be made. have.

In this embodiment, since the concave portions 7 of the metal brushes 2a and 2b are formed at positions distributed in four directions around the rotational axis, they are in contact with the annular electrodes 1a and 1b. It is done in these four rooms. Therefore, even when the metal brush holder is exhibited and the metal holder 4 is inclined, the metal brush holder is always in contact with it at a position.

Further, as in this embodiment, when the metal brush holder 4 and the annular electrode holder 3 are combined to form a gap 19, the annular electrodes la, 1b and the metal brush 2a, Metal powder or the like due to friction generated by friction with (2b) can be discharged to the outside between the gaps 19.

Again, the current collector of this embodiment can be used in combination in plurality, as shown in FIG.

In FIG. 4, the connecting rod 20 is passed through the metal brush holder holes 4b of the two current collector devices. As shown in Fig. 4, when the two current collectors are combined, it can be used for three-phase alternating current or the like. At this time, the rotating part is free of whistling and can be brought into a more stable contact state. Moreover, since each current collector device is independent in the contact state, even if a force is applied from the outside and the rotation axes of the two current collector devices change, the contact state of the electrode is always kept good.

5 is an exploded front view showing a second embodiment of the present invention. In FIG. 5, the annular electrode holder 3 side is comprised by fixing two annular electrodes 1a and 1b similarly to the Example shown in FIG. 1 of the metal brush holder 4 In the two grooves 4a and 4b, two divided metal brushes 22a and 22d are provided on both sides, respectively.

A protruding portion 27 is formed at both ends of each of the metal brushes 22a and 22d, and protrudes at a height in contact with the annular electrodes 1a and 1b when engaged with the annular electrode holder 3. It is. Each metal brush 22a, 22d is being fixed to the metal brush holder 4 by the fixing metal fitting 23. As shown in FIG.

Since two metal brushes which are located in the same groove need to be electrically connected with each other, they are electrically connected by the metal pieces 24 and 25 provided in the back of the figure of the metal brush holder 4, respectively.

The metal brush of the current collector of the present invention may be divided as in the embodiment shown in FIG. 5 or may be continuous in an annular manner as in the embodiment shown in FIG. Also in the case of the sequential one. Like the metal brush 2 shown in FIG. 6, the groove 32b may be deeply inserted into the annular metal disc, and the deep groove portion may be bent and raised to form the portion 37. FIG.

FIG. 7 is a front view showing a state in which the metal brush shown in FIG. 6 is provided in the metal brush holder. Holes 4c and 4d are formed in the grooves 4a and 4b of the metal brush holder 4, respectively, and the connection portions 32a of the metal brush to the holes 4c and 4d (6th). (Shown in Fig.) Is provided. In this way, the metal brush can be fixed by restraining the movement of the metal brush in the groove.

In the example shown in FIG. Although a deep groove is formed in the outer periphery of the annular metal disc to form the concave portion on the outer periphery side, the concave portion may be formed so as to draw a groove with a depth of depth that passes through the inner periphery of the annular metal disc. In addition, as in the metal brush 42 shown in FIG. 8, the groove portion 47 may be formed at an intermediate position between the inner circumference and the outer circumference by drawing a substantially u-shaped depth overgroove 42b groove.

As a material of the annular electrode used for this invention. As long as it is a metal used as an electrode in a general electrical apparatus, although brass is not particularly limited in terms of workability and price.

Also. The material of the metal brush is not particularly limited as long as the metal is elastic enough to be in good contact with the annular electrode, but phosphor bronze is recommended in view of workability and price.

In addition, if it is formed in the concave portion which is in effective contact with the annular active. In particular, the shape is not limited. Again. Since the contact between the metal brush and the annular positive electrode is held by the additional means, the metal brush may be used even if the metal is less elastic than conventionally.

According to the present invention, in the current collector device, additional means are provided to maintain contact between the annular electrode and the metal brush. Therefore, even if the elasticity of the metal brush itself is weak, the annular positive electrode and the metal brush are in good contact. Therefore, the contact state does not deteriorate even after long-term use, so the service life is longer than that of the conventional current collector.

Claims (1)

A current collector for conducting electric current between a rotating part and a stop part, comprising: an annular positive electrode made of a metal plate material, an annular positive electrode holder holding the annular electrode, and a metal plate, and partially bending the metal plate material. A metal brush provided to contact the annular positive face formed by the zoom, the brush holder holding the metal brush, and the annular electrode holder to maintain contact between the annular positive face and the recess of the metal brush. And an additional means for joining one side of the brush holder to the other side, wherein at the center of one of the holder of the annular electrode holder and the brush holder, a cylindrical protrusion extending in a direction substantially perpendicular to the holding surface of the holder; Is engraved, and the fitting part 12 which fits the cylindrical protrusion part in the center of the other holder is shape | molded The annular electrode holder and the brush holder are combined by inserting the cylindrical protrusion into the fitting portion, and in this combined state, the additional means moves one of the annular electrode hole and the brush holder to the other side. Current collector device.