JP4625977B2 - Rotary brush - Google Patents

Description

  The present invention relates to a rotary brush, in particular, equipped with a swivel base in an industrial machine or the like, and is supplied with power from a power supply unit of a machine body portion on a fixed side to various working mechanisms in a movable region and transmission of control signals accompanying operation commands. The present invention relates to a rotary brush that is commonly used.

  In a construction vehicle such as a truck crane vehicle or an aerial work vehicle, a cockpit, a crane, and the like are equipped upward via a swivel mounted on the vehicle body. The outrigger's telescopic motion is controlled, and the crane mechanism is freely telescopic or rotationally driven according to the work content. In this case, the control signal from the cockpit for the various operating devices equipped and the power supply required for the operation are conventionally required to be always conducted through the rotary brush which is the omnidirectional wiring connection contact. It is supposed to be communicated to the place to do.

For example, as shown in FIG. 10, this type of rotary brush includes a slip ring body 102 formed by laminating a plurality of unit slip rings 101 in multiple stages, and a coupling connected on a concentric shaft of the slip ring body 102. 103, a base main body (device main body) 105 that rotatably holds the slip ring main body 102 described above via the coupling 103, and the units described above that are electrically and independently held on the base main body 105 side. It has a structure provided with a plurality of wire-like brushes 201 that are in contact with the current-carrying surface of the slip ring 101 so as to be individually slidable with appropriate springiness.
The plurality of wire-like brushes 201 are divided into brush holding members 202 and 203 and are electrically held independently of each other. Reference numeral 301 indicates wiring for energizing the illumination, drive motor, control operation means, and the like in the work area from the coupling 103.

  For this reason, even if the work area side rotates relative to the base main body 105 in the horizontal plane, the rotary brush coupling 103 and the slip ring main body 102 rotate effectively following this, so that the drive Various control signals output from the power source and the cockpit can be transmitted individually and smoothly to various devices corresponding to the various control signals.

  On the other hand, industrial machinery such as cranes and construction machinery (construction machinery) has increased in number of drive motors and lighting means for various types of operating equipment with the increase in functionality. The number of electrodes is increasing. In addition, the rotary brush is gradually becoming larger by increasing the thickness of the contact or additionally providing a protective member in order to enhance durability against continuous operation.

On the other hand, since the rotary brush itself is inherently part of the electrical wiring, there has always been a conflicting problem of downsizing and enhancement of durability.
For this reason, in recent years, various attempts have been made to reduce the size of the rotary brush and enhance the durability, as can be seen, for example, in Patent Documents 1 and 2.
Japanese Utility Model Publication No.58-125384 Actual Fairness 2-36228

Each rotary brush described in Patent Documents 1 and 2 (slip ring device), each collector ring each unit slip-ring one unit slip ring against slidably abutting brushes of which is a (brush) As described above, a plurality of wire-like brushes divided into left and right are provided, whereby the electrical resistance during operation is set small, and the entire rotary brush (slip ring device) can be downsized.
However, since each current collecting ring and brush (brush) are made of metal, there is a lot of wear, and there is a problem in durability in continuous operation for a long time.

  The object of the present invention is to improve the disadvantages of the conventional example, and in particular to provide a rotary brush that can be miniaturized and has good durability.

  In the present invention, the rotary brush includes a slip ring body formed by laminating a plurality of unit slip rings in multiple stages, a coupling connected on a concentric shaft of the slip ring body, and the slip described above via the coupling. A base body that rotatably holds the ring body, and a plurality of wires that are electrically held independently by the base body and that are individually slidably contacted with the current-carrying surface of each unit slip ring with appropriate springiness And a brush.

  For this reason, for example, the power circuit on the base body side and various control circuits and load circuits such as motors in the work area rotatably mounted on the main body are individually connected via the rotary brush even if the work area rotates. And since it is a wire-like brush that can be always connected smoothly and is in contact with each unit slip ring of the slip ring body provided in the rotary brush, the space area occupied by the brush can be extremely reduced, Therefore, the entire base body of the rotary brush (that is, the entire outer diameter of the rotary brush) can be set to be significantly small.

Further, in the present invention, each of the plurality of unit slip rings described above is formed into a disk-shaped slip ring element having a contact surface with a wire-shaped brush on the outer peripheral end surface thereof, and is also formed in the shape of a disk and has the aforementioned slip. A disc-shaped insulating plate is provided on the side surface of the ring element and holds the slip ring element firmly .
And, the slip ring element formed in the disc shape is configured to be integrated by three disc members whose side surfaces are in contact with each other on the concentric axis, and this three-layer structure slip ring The disk-shaped member located in the center part of an element is formed with a graphite member (Claim 1).

For this reason, since the wire-like brush always abuts against the graphite member portion of the slip ring element at the outer peripheral end where the brush abuts, the highly lubricated graphite powder generated thereby causes the outer peripheral end of the wire brush and the slip ring element. Therefore, the contact between the wire brush and the slip ring element is always performed via the graphite powder. For this reason, there is an advantage that the wear resistance can be remarkably increased while effectively maintaining the continuity of the wire brush and the slip ring element. Further, since the disc-shaped member having a three-layer structure and the central part is a graphite member, the graphite member can be held in a stable state for a long period of time, and in this respect, there is an advantage that durability can be increased. .

Here, the three disc-shaped members in the slip ring element having the three-layer structure may be configured such that a plurality of portions are engaged with each other by knock pins and integrated .

In addition, the three disk-shaped members in the slip ring element having the three-layer structure may have a configuration in which each contact surface is provided with irregularities and is integrated with an adhesive filled in the irregular portions (claims). Item 3).

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Here, the outer peripheral end face of the slip ring element described above, may be formed a V-shaped groove for receiving the brush (Claim 4).
If it does in this way, in the contact surface with the wire-shaped brush in the inclined surface of a V-shaped groove | channel, on the boundary line of a graphite member and one disk-shaped member, and on the boundary line of a graphite member and the other disk-shaped member, The wire-like brush can be set to abut at two locations, and this allows the wire-like brush to abut on the slip ring element smoothly for a long time by the lubricating action of the graphite particles adhering to the wire-like brush. There is an advantage that you can.

Furthermore, among the slip ring elements having the three-layer structure described above, predetermined inclined surfaces (which may be the same or different inclination angles) are provided on the opposing surfaces of the disk-like members located on both sides, You may make it comprise the bottom face of the trough part formed by an inclined surface with the outer peripheral end surface of the graphite member of a center part (Claim 5 ).
Even in this case, it is possible to obtain a rotary brush having substantially the same function as that described in each of the above-mentioned claims, and further, the outer diameter portion of the graphite member sandwiched in the central portion due to the structure. Can be made into a simple disk shape, so that it is not necessary to perform slope cutting of a graphite member having inferior machinability, and there is an advantage that productivity can be improved.

In addition, the diameter of the outer periphery of the graphite member located at the center of the slip ring element having the three-layer structure described above is set smaller than the outer diameter of the disk-like member located on both sides thereof, and You may make it set the space | interval between the disk-shaped members located to a dimension space | interval larger than the diameter dimension of the wire-shaped brush mentioned above (Claim 6 ).
Thus Then, for example, wire-like brush by vibration or the like contact since the side wall portion be moved instantaneously (discoid member) is in the upright disk-shaped member of the side wall The state can be maintained, and in this respect, there is an advantage that the contact state between the slip ring element and the brush can be satisfactorily maintained even when used under adverse conditions.

Further, instead of the above-described graphite member, a composite member formed by mixing and molding graphite particles and metal particles (for example, particles made of a metal having a high spreadability such as aluminum or silver) may be used. Instead of the graphite member, a composite member formed by mixing graphite particles and copper or copper alloy particles may be used (claims 7 to 8 ).
Even if it does in this way, since the function equivalent to the thing of each said Claims 1-6 can be obtained, and also the composite member is a raw material containing the metal member with favorable machinability, cutting work Therefore, the shape and structure of the composite member can be freely formed, so that productivity and maintainability can be remarkably improved.

  Since the rotary brush according to the present invention is constructed and functions as described above, according to this, not only can the overall size be reduced by the provision of the wire brush, but also each unit slip with which the wire brush abuts. Since the wire brush contacts the graphite member portion of the slip ring element during operation at the outer peripheral surface of the ring, the highly lubricated graphite powder (graphite particles) is generated on the outer peripheral surface of the wire brush and slip ring element. Therefore, the contact between the wire brush and the slip ring element is always performed via the graphite powder. For this reason, it is possible to realize both downsizing and significant improvement in durability at the same time that the wear resistance can be remarkably increased while effectively maintaining the continuity of the wire brush and slip ring element. No excellent rotary brush can be provided.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a longitudinal sectional view of a rotary brush according to the present invention. FIG. 2 is a bottom view of FIG. 1 described above. Here, FIG. 1 is a schematic cross-sectional view when cut along a line including the brush holding members 202 and 203 (for example, line AA in FIG. 2).

  The rotary brush shown in FIGS. 1 and 2 includes a slip ring body 2 formed by laminating a plurality of unit slip rings 1 in multiple stages, a coupling 3 connected on a concentric shaft of the slip ring body 2, and A base main body (device main body) 5 that rotatably holds the above-described slip ring main body 2 via the coupling 3 is provided. Further, on the base body 5 side, a plurality of wire-like brushes 201 that are in contact with the surface of the current-carrying portion of each unit slip ring 1 to be individually slidable with appropriate springiness are electrically independent. Is retained.

  Among these, each of the plurality of wire-like brushes 201 described above is equipped with, for example, phosphor bronze or the like and made in a U shape with an appropriate spring effect as shown in FIG. Each wire-like brush 201 is divided into brush holding members 202 and 203 and held electrically independently, as in the case of the conventional example shown in FIG. Each wire brush 201 is communicated independently with a predetermined circuit connected to the base body (device body) 5 side.

  Reference numeral 301 denotes wiring for energizing each unit slip ring 1 from the unit slip ring 1 to the illumination or drive motor or control operation means, as in the case of FIG. 10 (conventional example) described above.

For this reason, in a construction machine or the like equipped with a rotary brush, even if the work area side such as a cockpit rotates and moves in a horizontal plane with respect to the base body 5 side, for example, the coupling 3 and the slip ring body 2 of the rotary brush This effectively follows this and rotates, which makes it possible to smoothly transmit various control signals output from the drive power supply and cockpit to the corresponding devices. Yes.
Here, the slip ring main body 2 includes eight sets of unit slip rings 1 as shown in FIG. 1 in this embodiment, whereby eight sets of independent slip rings are provided between the base main body (device main body) 5 and the work area. The circuit can be always communicated.

  FIG. 3 shows a state where a part of the slip ring body 2 is taken out and the unit slip rings 1 are stacked. Reference numeral 2A denotes a fastening bolt hole for fixing the eight stacked unit slip rings 1 in common. In the present embodiment, the fastening bolt holes 2A are provided at three locations on the same circumference and separated by 120 ° so that each unit slip ring 1 is fastened uniformly. FIG. 2 shows the fastening bolt 2B in this case.

Reference numeral 2P denotes a holding plate for holding the unit slip ring 1 located at the lower end of FIG. Reference numeral 11Aa denotes an output terminal provided in a slip ring element 11 described later of each unit slip ring 1.
The output terminal 11Aa is incorporated so that the output terminals 11Aa included in the slip ring elements 11 are arranged 120 ° apart when the plurality of unit slip rings 1 are stacked and integrated. A specific example is shown in FIG.

  Here, each unit slip ring 1 mentioned above, especially the slip ring element 11 is further explained in full detail.

First, as shown in FIG. 4, each unit slip ring 1 is formed in the same disk shape as the disk-shaped slip ring element 11 having the contact surface with the wire-shaped brush 201 described above on the outer peripheral end surface thereof. The disc-shaped insulating plate 12 is disposed on the side surface of the slip ring element 11 and holds the disc-shaped slip ring element 11 firmly.
In this case, the slip ring element 11 and the disk-shaped insulating plate 12 are separately formed in advance so as to be able to engage with each other on a concentric shaft, and then the side surfaces thereof are in close contact as shown in FIG. And are integrated with each other. 4B and 4C show a state in which the unit slip ring 1 is integrated.

In this case, the disk-shaped insulating plate 12 for holding the disk-shaped slip ring element 11 is formed in a disk shape as shown in FIG. The partial projecting portion 12Aa projecting toward the center portion side is provided. The partial projecting portion 12Aa is provided with the above-described fastening bolt hole 2A for stacking engagement.
Further, the surface of the disc-like insulating plate 12 where the fastening bolt hole 2A is formed is disc-shaped along the inner diameter side hole 12A of the disc-like insulating plate 12, and the left side of FIG. The disk-shaped projecting surface 12B is fitted around the disk-shaped projecting surface 12B so that the inner diameter side of the disk-shaped slip ring element 11 is fitted. Further, the engagement protrusions in a state of slightly protruding from the surface of the disk-shaped projecting surface 12B around the fastening bolt holes 2A formed at three locations on the surface of the disk-shaped projecting surface 12B. A portion 12C is provided, and correspondingly, an engaging recess 12D is provided at the opposite end.

  Each unit slip ring 1 having the disk-shaped insulating plate 12 formed in this way is a plurality of unit slip rings 1 at the disk-shaped insulating plate 12 portion. 12D, and is stacked on the concentric shaft and integrated as described above (see FIG. 3).

In the present embodiment, the disc-shaped slip ring element 11 described above is composed of three disc-shaped members stacked on each other on the concentric shaft and the side surfaces are in contact with each other, and the three-layer structure thereof. The disc-shaped member at the center is formed of the graphite member 11B.
More specifically, as shown in FIGS. 6 to 7, the slip ring element 11 includes a disc-shaped graphite member 11 </ b> B on the inner side, one slip ring member 11 </ b> A that is a disc-shaped member, It is laminated | stacked with the other slip ring member 11C provided in the other side which is a disk-shaped member similarly, and is integrated by the three-layer structure.

Among these, as shown in FIG. 6, one slip ring member 11 </ b> A is provided with an output terminal 11 </ b> Aa projecting from the inner diameter side toward the center portion to connect to the wiring 301 to the outside (work area) described above. ing.
In addition, in this embodiment, the one slip ring member 11A is formed such that the inner diameter of the disk is smaller than the inner diameter of the disk of the other slip ring member 11C. Concave portions 11Ab that are in contact with and held by the engaging protrusions 12C of the disk-shaped insulating plate 12 described above are equally provided at three locations around the periphery.
The recess 11Ab is incorporated in accordance with the outer diameter of the engaging protrusion 12C of the disk-shaped insulating plate 12 described above.

One and the other slip ring members 11A, 11C constituting the slip ring element 11 and the graphite member 11B are engaged and integrated by knock pins 11P at a plurality of locations (eight locations in the present embodiment). .
In this case, for the graphite member 11B, the pin hole 11Bp (see FIG. 7A) for the knock pin 11P is simultaneously formed in advance in the present embodiment during the sintering process. In addition, a pin hole for a knock pin 11P is formed in advance in each of the one and the other slip ring members 11A and 11C in accordance with the pin hole 11Bp, and these three members are easily integrated via the knock pin 11P in this embodiment. It has come to be.

  In addition, about the engagement means of this one and the other slip ring members 11A and 11C and the graphite member 11B, although the case by the knock pin 11P was illustrated in the said embodiment, in this invention, it does not necessarily limit to this, For example, Appropriate irregularities (may be groove-shaped) are provided on the contact surfaces of the disk-shaped graphite member 11B and slip ring members 11A and 11C on both sides thereof, and this portion is filled with an adhesive or a predetermined engaging member. The three members may be integrally fixed on each side.

Further, the slip ring element 11 described above is provided with a groove portion 11M having a V-shaped cross section around the outer peripheral end surface (a portion that contacts the wire brush 201 described above) (see FIG. 7A). . The V-shaped groove portion 11M is formed by predetermined inclined surfaces 11Ae and 11Ce formed at the opposite corner portions of the one and the other slip ring members 11A and 11C described above, and the opening angle α is the present embodiment. In the form, it is set to 90 °.
In this case, the V-shaped groove at the bottom of the V-shaped groove 11M is formed and maintained by the graphite member 11B which is a disk-shaped member. FIG. 7A described above shows an enlarged view of the V-shaped groove 11M. FIG. 7B shows a contact state between the V-shaped groove 11M and the wire brush 201 described above.

  The V-shaped groove portion 11M is symmetrical in FIG. 7A, and the opening angle α is set to 90 °. Therefore, in the present embodiment, the disk-shaped graphite member 11B located at the center in the drawing also has an outer peripheral end surface that forms the bottom of the V-shaped groove 11M. For this reason, as in the case of the knock pin 11P described above, in this embodiment, the V-shaped groove 11M portion in the graphite member 11B is simultaneously formed in advance during the sintering process. In this case, the opposing surfaces of the one and the other slip ring members 11A and 11C may be processed in advance with a predetermined inclined surface assuming the V-shaped groove 11M, or after sandwiching the graphite member 11B. You may make it process the character-shaped groove part 11M.

  FIG. 7B shows a state in which the wire-shaped brush 201 is in contact with the V-shaped groove 11M. In this case, on the inclined surface of the V-shaped groove portion 11M, a state in which the wire brush 201 is in contact with the left and right two boundary points in the same cross section between the one and the other slip ring members 11A and 11C and the graphite member 11B is obtained. Therefore, an appropriate amount of graphite particles adheres to the inclined surface of the V-shaped groove 11M and the wire-shaped brush 201 while maintaining a good conduction state even by continuous operation, and thereby the inclined surface of the V-shaped groove 11M. Further, the frictional resistance between the wire-like brushes 201 is reduced by the lubricating action of the graphite particles, and the durability can be greatly improved.

  As described above, in the above-described embodiment, since the wire brush 201 is in contact with the V-shaped groove portion 11M of the slip ring element 11 with an appropriate spring force, the V of the slip ring element 11 is In the letter-shaped groove portion 11M, the wire-like brush 201 always comes into contact with and slides at two locations in the same cross section, and at this point, a stable conduction state between the two can be maintained.

  In addition, since the wire brush contacts the graphite member portion of the slip ring element 11 at the outer peripheral end surface with which the wire brush 201 contacts, the highly lubricated graphite powder (graphite particles) generated thereby causes the wire brush 201 and the slip. It will adhere to the outer peripheral end surface of the ring element 11, and the contact between the wire-shaped brush 201 and the slip ring element 11 is always performed through the graphite powder. For this reason, wear resistance can be remarkably increased while maintaining the electrical conductivity of the wire brush 201 and the slip ring element 11 respectively.

  Further, since the wire brush 201 is provided as a brush of the rotary brush, the entire rotary brush can be reduced in size, and at the same time, graphite powder (graphite particles) having high lubricity is provided on the outer peripheral end surfaces of the wire brush 201 and the slip ring element 11. Therefore, the frictional resistance between the slip ring element 11 and the wire-like brush 201 is reduced by the lubricating action of the graphite particles, thereby obtaining a rotary brush that is miniaturized and has a significantly improved durability. be able to.

[Modification (1)]
Here, in the embodiment shown in FIG. 1 to FIG. 7 described above, the V-shaped groove portion 11M is exemplified by the case where a relatively small V-shaped groove is provided also for the graphite member 11B that handles the bottom portion. May be the circumferential end surface itself of the disk-shaped graphite member 11B without providing a relatively small V-shaped groove.
That is, a predetermined inclined surface is formed at the outer peripheral end portion on the opposite surface side of the disk-like members (one and the other slip ring members 11A and 11C) located on both side surfaces of the three-layer structure slip ring element 11 described above. The V-shaped groove portion 11M is provided, and the bottom surface of the valley portion formed by the inclined surfaces of the V-shaped groove portion 11M is formed as shown in FIG. You may comprise by the outer peripheral end surface itself without a groove | channel of the state (state before groove processing) which removed the V-shaped groove part 11M from the outer peripheral end surface of 11B.
In this way, the disk-shaped graphite member 11B does not need to V-groove the bottom of the V-shaped groove portion 11M, so that the shape of the graphite member 11B can be easily specified, and overall productivity is greatly increased. Can be improved.

[Modification (2)]
Moreover, the diameter of the outer periphery of the graphite member 11B which is a disc-shaped member located in the center portion of the slip ring element 11 having the three-layer structure in the embodiment shown in FIGS. 1 to 7 described above is located on both side surfaces thereof. The wire-shaped brush 201 described above is set to be smaller than the outer peripheral diameter of the disk-shaped members (one and the other slip ring members 11A and 11C) and the distance between the disk-shaped members 11A and 11C located on both side surfaces is set. Thus, a U-shaped groove portion 11U having a U-shaped cross section is used instead of the V-shaped groove portion 11M formed on the outer peripheral portion of the slip ring element 11 described above (see FIG. 8 ( B)).
Here, as the disk-shaped member, instead of the one and other slip ring members 11A and 11C described above, one and the other slip ring members 11E and 11F provided with small inclined surfaces 11Ea and 11Fa for guidance are provided. The shape was different.

  Even if it does in this way, in addition to the effect similar to the thing of embodiment of FIG. 1 thru | or FIG. 7 mentioned above, even if the wire-like brush 201 moves instantaneously by vibration etc., a side wall part (disk-like member) Since the one and other slip ring members 11E, 11F) are in an upright state, the state in which the side wall is in contact with the disk-like member (one and the other slip ring members 11E, 11F) is maintained. In this respect, there is an advantage that the contact state between the slip ring element 11 and the wire brush 201 can be well maintained even under use under adverse conditions.

  1 to 7 and the modified examples, the slip ring element 11 has a three-layer structure and the outer peripheral end face is provided with a V-shaped groove 11M or a U-shaped groove 11U. Although illustrated, the present invention is not necessarily limited to this, and the structure of the slip ring element 11 is a disk-like shape at a position where the outer peripheral end portion of the slip ring element 11 contacts the wire brush 201 described above. As long as the graphite member is integrally mounted as a part of the slip ring element 11, the three-layer structure is not necessarily required.

Further, even if the shape of the outer peripheral end surface of the slip ring element 11 is not provided with the V-shaped groove portion 11M or the U-shaped groove portion 11U, for example, as shown in FIG. You may comprise a contact surface and the flat outer peripheral end surface where a cross section is a straight line in the left-right direction.
Even in this case, substantially the same effect as that of the embodiment described in FIGS. 1 to 7 can be obtained by the spring action of the wire brush 201 described above.

[Other Embodiments]
(1). Next, another embodiment will be described based on FIGS. 9A, 9B, and 9C.
First, in another embodiment shown in FIG. 9A, a slip ring element 21 substantially equivalent to this is provided in place of the slip ring element 11 in the embodiment disclosed in FIGS. The element 21 is composed of one and the other two disk-shaped members 21A and 21B whose side surfaces are in contact with each other on a concentric axis. At the same time, inclined surfaces 21Aa and 21Ba having a predetermined angle β (β = 45 ° in FIG. 9A) are provided on the opposite sides of the outer peripheral ends of the disk-like members 21A and 21B, respectively. The disk-like member 21B is composed of a graphite member.

Due to the inclined surfaces provided at the outer peripheral ends of the respective disk-like members 21A and 21B, the slip ring element 21 is also formed with a V-shaped groove 21M equivalent to the slip ring element 11 described above. In this case, in FIG. 9A described above, the opening angle α is set to 90 ° in the same manner as in FIG. Other configurations are the same as those of the above-described embodiment shown in FIGS.
Even if it does in this way, since the effect substantially the same as embodiment in FIG. 1 thru | or FIG. 7 mentioned above can be acquired, since a structure is simplified, improvement of productivity and durability can be aimed at.

(2). Further, in another embodiment shown in FIG. 9B, a slip ring element 22 substantially equivalent to this is provided instead of the slip ring element 11 in the embodiment disclosed in FIGS. The element 22 is constituted by one and the other two disk-like members 22B and 22A, whose side surfaces are in contact with each other on a concentric axis. Of these, the inclined surface 22Aa for contacting the brush is provided at the outer peripheral end of the other disk-shaped member 22A on the side facing the one disk-shaped member 22B, and at the same time, the one disk described above. The plate-like member 22 </ b> B is constituted by a disk-like graphite member, and thereby, a structure is provided in which a deformed V-shaped groove portion 22 </ b> M is provided on the outer peripheral end surface of the slip ring element 22.
In this case, the angle β of the inclined surface 22Aa of the other disk-shaped member 22A is set to 45 ° in FIG. 9B, but may be set to an appropriate angle other than 45 °. Other configurations are the same as those of the above-described embodiment shown in FIGS.

  Even if it does in this way, since the effect similar to embodiment in FIG. 1 thru | or FIG. 7 mentioned above can be acquired, since the process of the peripheral edge part of the graphite member 22B is unnecessary, productivity improvement is in this point. Can be planned.

(3). Furthermore, in another embodiment shown in FIG. 9A, the case where the V-shaped groove portion 21M is provided in the outer peripheral portion of the slip ring element 21 is exemplified. However, instead of this slip ring element 21, it is almost equivalent to this. A functioning slip ring element 23 (see FIG. 9C) is provided, and the slip ring element 23 is integrated with one whose outer peripheral end surfaces have the same diameter and are in contact with each other on concentric axes. The other two disk-like members 23A and 23B are used. In the embodiment shown in FIG. 9C in which one of the disk-shaped members is formed of a graphite member, the other disk-shaped member 23B is formed of a graphite member.
That is, the slip ring element 23 shown in FIG. 9C includes two integrated disk-shaped members 23A and 23B (the other disk-shaped member 23B is formed of a graphite member. ), And the entire disk-shaped outer peripheral end surface was used as a brush contact surface. Other configurations are the same as those of the embodiment shown in FIGS.
Even in this case, the effect similar to that of the embodiment shown in FIG. 8C can be obtained by the spring action of the wire brush 201 described above.

(4). In each of the above-described embodiments and modifications thereof, the disk-shaped graphite member 11B is disposed at a position where the outer peripheral ends of the disk-shaped slip ring elements 11, 21, 22, 23 are in contact with the wire-shaped brush 201. , 21B, 22B, and 23B are disclosed as an integral part of the slip ring element.
On the other hand, in other embodiments in this section, graphite particles and metal particles are mixed instead of the disk-like graphite members 11B, 21B, 22B, and 23B equipped in the above-described embodiments and modifications thereof. A disk-shaped composite member formed by mixing (for example, mixing graphite particles and aluminum particles, or mixing graphite particles and copper or copper alloy particles) is provided. Other configurations are the same as those of the above-described embodiments and modifications thereof.
Here, as the metal particles constituting a part of the composite member, in addition to the above-described aluminum particles, silver particles, copper or copper alloy particles, other metals can be used as long as they have good machinability and conductivity. It may be a particle.

  Even in this way, it is possible to obtain substantially the same operational effects as in the case of each of the above-described embodiments and modifications thereof, and further, the workability of the composite member is greatly improved compared to the graphite member, It is possible to provide an unprecedented excellent rotary brush that can be processed into various shapes and can significantly improve productivity and versatility.

  Furthermore, in each of the above-described embodiments, the case where the wire-like brush 201 having a circular cross section is illustrated, but in the present invention, the wire-like brush 201 has a circular cross section. For example, at least the cross section of the contact portion is set in a trapezoidal shape or a plate shape in accordance with the contact surface of the unit slip ring 1 with the slip ring element. It may be an increase.

  The disc-shaped slip ring elements 11, 21, 22, and 23 equipped in the above embodiments and modifications thereof are concentric with three or two disc-shaped members (one of which is a graphite member). The structure is engaged on the shaft, but the entire disc-shaped slip ring elements 11, 21, 22, and 23 have good conductivity other than a composite member in which graphite particles and aluminum particles are mixed or aluminum. It may be formed of a composite member obtained by mixing metal particles and graphite particles. By doing so, it is possible to obtain a slip ring element that is easy to cut and has high wear resistance, and it is possible to obtain a highly reliable rotary brush that has good productivity and durability.

  The present invention has been described assuming the rotary brush incorporated mainly in a construction machine or the like having a swivel base as described above. However, the present invention can be effectively used for a multi-function processing robot in a production factory.

It is the figure which abbreviate | omitted partially showing one embodiment of this invention, and is a schematic longitudinal cross-sectional view at the time of cut | disconnecting along the line containing a brush holding member. FIG. 2 is a bottom view in which the embodiment shown in FIG. 1 is partially omitted. 3A and 3B are diagrams showing a slip ring main body portion disclosed in FIG. 1, FIG. 3A is an explanatory view showing a state seen from below in FIG. 1, and FIG. 3B is a right side view of FIG. . FIG. 4A is a diagram illustrating a unit slip ring in FIG. 3, FIG. 4A is an explanatory diagram illustrating a state immediately before the slip ring element is integrated with a disk-shaped insulating member, and FIG. FIG. 4C is a right side view of FIG. 4B, illustrating the state after being mounted on the cylindrical insulating member. 5A and 5B are diagrams showing the disk-shaped insulating member disclosed in FIG. 4, in which FIG. 5A is an overall explanatory view, and FIG. 5B is a right side view of FIG. 6A and 6B are diagrams illustrating the slip ring element disclosed in FIG. 4, in which FIG. 6A is an overall explanatory view, and FIG. 6B is a right side view of FIG. 7A and 7B are detailed explanatory views showing an outer peripheral end portion of the slip ring element disclosed in FIG. 6, in which FIG. 7A is an enlarged partial sectional view, and FIG. FIG. 8A is a view showing a modified example of the slip ring element having the three-layer structure disclosed in FIG. 7, and FIG. 8A is an explanatory view showing an example in which the bottom surface of the V-shaped groove on the outer peripheral end face is flat; FIG. 8B is an explanatory view showing an example when the V-shaped groove on the outer peripheral end face is a U-shaped groove, and FIG. 8C is an explanatory view showing an example when the outer peripheral end face is flattened. FIG. 9 (A) is a diagram showing other three embodiments, and FIG. 9 (A) is an explanatory view showing an example in which the slip ring element has a two-layer structure and a V-shaped groove is provided on the outer peripheral end face. FIG. 9B is an explanatory diagram showing an example in which the V-shaped groove on the outer peripheral end surface is a deformed V-shaped groove, and FIG. 9C shows the outer peripheral end surface along the central axis without the V-shaped groove on the outer peripheral end surface. It is explanatory drawing which shows the example at the time of making it flat. It is explanatory drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unit slip ring 2 Slip ring main body 3 Coupling 11, 21, 22, 23 Slip ring element 11A One slip ring member as a disk-shaped member 11Aa, 11Ba, 11Ca, 21Aa, 21Ba, 22Aa Inclined surface 11B Disk shape Graphite member 11C The other slip ring member 11C, 21M V-shaped groove 11U U-shaped groove 12 Disk-shaped insulator 21A 22A 23A Disk-shaped member 21B 22B 23B As a disk-shaped member Graphite Member 22M Deformed V-shaped Groove 201 Wire Brush

Claims (8)

A slip ring body formed by laminating a plurality of unit slip rings in multiple stages, a base body for rotatably holding the slip ring body via a coupling, and electrically and independently held by the base body In a rotary brush provided with a plurality of wire-shaped brushes having a structure in which each unit slip ring is in contact with an outer peripheral end surface which is a conductive portion so as to be individually slidable with appropriate springiness,
Each of the plurality of unit slip rings has a disk-like slip ring element having a contact surface with the wire-like brush on an outer peripheral end surface thereof, and is also formed in a disk shape and disposed on a side surface of the slip ring element. And having a configuration including a disc-shaped insulating plate for fixing and holding the slip ring element,
The slip ring element formed in a disk shape is configured to be integrated with three disk members whose side surfaces are in contact with each other on a concentric shaft, and the slip ring element of this three-layer structure is configured. A rotary brush characterized in that a disk-shaped member located in the center is made of a graphite member. 2. The rotary brush according to claim 1, wherein the three disk-shaped members in the three-layer structure slip ring element are integrated with each other at a plurality of positions by knock pins . 2. The three disc-shaped members in the slip ring element having the three-layer structure are integrated with an adhesive filled in the concavo-convex portions and provided with concavo-convex portions on the respective contact surfaces. Rotary brush as described in .   The rotary brush according to claim 1, wherein a V-shaped groove for receiving a brush is formed on an outer peripheral end face of the slip ring element.   A predetermined inclined surface is provided at the outer peripheral end portion on the opposite surface side of the disk-like member located on both sides of the three-layered slip ring element, and the bottom surface of the valley portion formed by each inclined surface is provided. The rotary brush according to claim 1, wherein the rotary brush is constituted by an outer peripheral end face of the graphite member at the center.   Among the three-layer structure slip ring elements, the outer diameter of the graphite member located at the center is set smaller than the outer diameter of the disk-like members located on the both side surfaces, and the circles located on the both side surfaces are set. The rotary brush according to claim 1, wherein a distance between the plate-like members is set to be equal to or larger than a diameter dimension of the wire-like brush. Of slip ring element of the three-layer structure, the material of the disc-shaped member positioned at the center, instead of the graphite member, so that the graphite particles and the metal particles using a composite member formed by mixing synthetic form rotary brush according to any one of claims 1 to 6, characterized in that the. Wherein among the slip ring element having a three-layer structure, the material of the disc-shaped member positioned at the center, instead of the graphite member, the composite member and the particles of graphite particles and copper or copper alloy formed by mixing synthetic form rotary brush according to any one of claims 1 to 6, characterized in that to use a.

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