JPS6039338A - sliding current collector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to the improvement of a sliding current collector, and particularly to the improvement of a sliding current collector employed in a slip ring, commutator, or Panda Guar 7 of a rotating electric machine. It is related to.

[Background of the invention]

In general, sliding current collectors include current collectors in pantographs for trains, slip rings and commutators in rotating electric machines, and brushes that slide on commutators and slip rings. Hereinafter, a conventional sliding current collector will be explained based on FIGS. 1 to 7.

Figure 1 shows the case where power is supplied from overhead lines of trains, etc.
A conductive part 2 slides on the overhead wire 1, the conductive part 2 is supported by a support J+-5 via an insulating part 4, and the current led to the conductive part 2 is supplied to a rotating electrical machine etc. through a lead wire 3. be done. Figures 2 and 3 show the configuration of a slip ring applied to current collection in a rotating electrical machine, and the slip ring is inserted into the shaft 6.
The insulating part 9 is attached to the outer periphery of the shaft 6 via the metal cylinder 10, electrically insulating between the shaft side and the slip ring 9, and the slip ring 9 is inserted into the outer periphery of the insulation part 9.
The current via the shift flows from the slip ring 8 to the windings etc. via the lead wire 3. In both FIGS. 1 and 3, a conductive part and an insulating part are manufactured respectively, and both are assembled to form a slip ring, which has the drawback of requiring a large number of parts and requiring a lot of man-hours.

FIG. 4 shows a commutator configuration whose structure is even more complicated.

(2) Arrange commutator pieces 11 along the circumference on the outer periphery of the box 12 with an insulating part 9 made of mica or the like interposed therebetween.

In addition, an insulating part is provided between the commutator pieces using interstage mica or the like (not shown) to electrically insulate them, and the ring 13 is tightened to manufacture the commutator. A brush 7 is supported on the outer periphery of the commutator by a brush holder 7c and slides on the commutator to transmit and receive electric power. Figure 5 shows the case of a molded commutator, with commutator piece 1
1 are arranged in a cylindrical shape at a predetermined interval and molded to form an insulating part 9. After that, the armature winding 15 which enters the armature core slot 14 is formed as shown in FIGS. 4 and 5. Connect to power the windings. Figure 6 is B-B of Figure 5.
Although the cross section is shown, it is composed of a commutator piece as a conductive part and a molded part 9 as an insulating part, and a metal cylinder is inserted between the molded part 9 and the shaft 6. Further, FIG. 7 shows the case of a flat plate commutator, in which fan-shaped commutator pieces are arranged in a circular shape and fixed with a molding material 9, and a metal cylinder 1
0 to the shaft. In the case of a commutator as well, the process of manufacturing and assembling the commutator pieces (generally made of steel) which are the conductive part, the mica molded product or molding material which is the insulating part, and the metal cylinder that supports them is taken. In particular, high manufacturing precision is required to prevent commutator pieces from flying out due to centrifugal force. As described above, the conventional sliding current collector has a drawback that it has a large number of parts and requires a large number of man-hours to manufacture and assemble each part.

[Purpose of the invention]

The purpose of the present invention is to provide a sliding device of this type in which the current collector, slip ring, and commutator for carrying current are constructed of ceramics, and in particular, the conductive part and the insulating part are integrally sintered to reduce the number of parts. To provide a current collector.

[Summary of the invention]

That is, in the present invention, a current collector is formed by arranging the raw material powder for the conductive ceramics and the raw material powder for the insulating ceramics in a predetermined arrangement, and heating or sintering them under high pressure to integrate the current collector, thereby forming a conductive part and an insulating part. It was designed so that all the members were busy and achieved the intended purpose.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 8 to 15.

Fig. 8 shows the configuration of the current collector of the present invention, in which the current from the rack A1 is guided to the conductive part 2a made of ceramics which is integrally sintered with the conductive part 2a and the insulating part 2b, and the lead wire 3 fixed to the conductive part is connected to a rotating electric machine, etc. The configuration for supplying power to is shown. FIG. 89 shows a slip ring of the present invention having a structure in which a conductive part 8a and an insulating part 8b are integrally sintered, and a groove 8c between the conductive parts 8a may be formed by machining after integral sintering.

In order to integrate such a conductive part and an insulating part, raw material powder for making conductive ceramics and raw material powder for making insulating ceramics are prepared, and in the case of the current collector shown in Figure 8. Put insulating raw material powder at the bottom of the mold,
By putting conductive raw material powder on top of it and heating it or heating it under high pressure, it is possible to make a ceramic that has conductivity and insulation properties in one piece. In addition, in the case of the slip ring shown in Figure 9, insulating raw material powder is placed on the inner periphery of the room, conductive raw material powder is placed on the outer periphery, and the outer periphery of the cylinder is heated or heated under high pressure. An integrated ceramic slip ring can be obtained in which nJ is conductive and the inner circumference giJJ is insulating. FIG. 1O is a sectional view taken along line BB' in FIG. 9. Note that the arrangement of the raw material powder is determined using a gravitational field or a centrifugal force field depending on the shape required for the product. In addition, here we have described the method starting from the raw material powder stage, but the ceramic raw material powder that will become the conductive part and the insulating part is solidified in advance into a predetermined shape, or solidified by preheating, and then the two are assembled together. It goes without saying that they may be integrated by heating or heating under high pressure.

Fig. 11 shows the case of a commutator, in which a conductive part 11a and an insulating part 111) are integrally sintered on the outer and inner peripheries of a cylinder, as in the case of a slip ring, and the region of the insulating part 11b is formed by machining or electric discharge machining. As many grooves 16 as the number of commutator pieces 11a required are provided.

Note that FIG. 12 shows a cross section of the commutator taken along line CC' in FIG. 11. Figure 13 shows the case of a flat plate commutator, in which the commutator piece 1a, which is a conductive part, and the insulating part 11b are constructed as flat plate layers, and are processed by machining or electrical discharge machining, etc., as in the case of the cylindrical commutator in Figure 12. Grooves are provided radially to form fan-shaped commutator pieces (not shown).

Fig. 14 has the same shape as the cylindrical commutator shown in Fig. 12, but there is a resistance between the commutator piece 11a, which is a conductive part, and an insulating part 11b, which is greater than the resistance of the conductive part and smaller than the resistance of the insulating part. A configuration is shown in which a medium resistance portion 11C is provided, made of integrally sintered ceramics, and grooves 16 are provided by machining, electrical discharge machining, etc. to form a commutator. Further, FIG. 15 shows a configuration in which a flat plate commutator is provided with a medium resistance section 11C. In this way, the medium resistance part is provided by placing the raw material powder of the ceramics that will become the medium resistance part between the raw material powder that will become the conductive ceramics and the raw material powder that will become the insulating ceramics, and then heating it or heating it under high pressure. When they are integrated, they form. In this case as well, each part may be solidified in advance and then combined and integrally sintered. In this way, the present invention can be manufactured by arranging and integrally sintering the conductive part and the insulating part or the raw material powders of the conductive part, the medium resistance part, and the insulating part at a stage before sintering into ceramics. As a result, the present invention is a current collector.

When manufacturing slip rings or commutators, the number of parts is small and the manufacturing man-hours can be significantly reduced.

In addition, the sintering temperature of ceramics is higher than the melting point of copper, so the current collector has excellent heat resistance and arc resistance.

There is also the benefit of slip rings and commutators.

In this embodiment, a metal cylinder on the inner peripheral side is not shown when inserting a slip ring or a commutator into a shaft, but a metal cylinder or an insulating cylinder may be provided if necessary.

〔Effect of the invention〕

According to the present invention, raw material powder of ceramics or temporarily solidified ceramics that can be made into conductive and insulating properties or any resistance is arranged in a shape suitable for the product and heated or heated under high pressure to form a conductive part. Since it is integrated with the insulating part, the number of parts is less than half of the conventional one, and the number of manufacturing steps can also be reduced by half.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional current collector, Figures 2 and 3 are radial and axial cross-sectional views of a conventional slip ring, Figure 4 is a conventional commutator, and Figures 5 and 6 are conventional mold commutators. 7 is a plan view and a sectional view of a flat plate commutator, FIG. 8 is a perspective view of a current collector of the present invention, FIG. 9.10 is a sectional view of a slip ring of the present invention, and FIG. 11. FIG. 12 is a sectional view of a commutator of the present invention, FIG. 13 is a sectional view of a flat plate commutator, FIG. 14 is a sectional view of a commutator provided with a medium resistance portion of the present invention, and FIG. 15 is a sectional view of a commutator of the present invention. FIG. 3 is a cross-sectional view of a flat plate commutator provided with a resistance portion. 8... Slip ring, F3a... Slip ring conductive part, 9 insulating part, 8b... Slip ring insulating part, 11... Commutator piece, lla... Commutator conductive part (
commutator piece), llb... commutator insulation part, IIC...
・Rectification 1st stop ztb 4th day 40th exit 9th exit (a) (b) Figure 8 1st exit Figure 10 11th Y3130 140th 1st mu 1st! Continued from page 1 @ Inventor Ryuta Jimbo 3-1 Saiwaimachi, Hitachi City ■ Inventor Fumi Matsushita 3-1 Mari, Hitachi City 0 inventors Yuki Kazu Tomoyasu 1 Chiyoda-ku, Tokyo 1 site 0 Author: Yoshimitsu Mihara, 1st office, Chiyoda-ku, Tokyo

Claims (1)

[Scope of Claims] 1. A sliding current collector comprising a conductive part placed and fixed on a support member, and an insulating part interposed between the conductive part and the support member, wherein the conductive part and The insulating part is sintered by solidifying and heating the conductive material and raw material powder of the insulating material, or by heating them together under high pressure, and the conductive material is on the side of the conductive part,
A sliding current collector characterized in that an insulating material is located on the support member side. 2. The sliding current collector according to claim 1, wherein conductive ceramics are used as raw materials for the conductive material and the P3 edge material.