JPH04104487A - Slip ring - Google Patents

Abstract

PURPOSE:To reduce the cost by precisely holding the ring interval between multiple electrode rings, and simplify the holding structure of the electrode rings. CONSTITUTION:Multiple insulating holders 16 are provided at an interval in the peripheral direction of electrode rings 19 of a slip ring 10. The insulating holders 16 are formed into a comb teeth shape, and multiple ring holding grooves 20 are provided in a line on one side. Multiple (several to tens) electrode rings 19 are inserted and held in the holding grooves 20. Electrode brushes 24 serving as moving contacts are slidably kept in electrical contact with the outer peripheries of multiple rings 19. Multiple holders 16 are arranged at a proper interval in the peripheral direction of multiple electrode rings 18 of the slip ring 10, the rings 18 are inserted and supported in the holding grooves 20 of the holders 16, thus the rings 18 hold the interval between electrodes via the comb teeth of the holders 16. The rings 18 can precisely hold the ring interval between electrodes.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a slip ring incorporated in an X-ray CT device, a current collector of a rotating machine, etc. Concerning an improved slip ring.

(Prior Art) This type of slip ring is incorporated into an X-ray CT apparatus, a current collector of a rotating machine, and the like. Among these, the slip ring built into the X-ray CT device electrically connects the rotating part and the fixed part of the gantry (frame) on which the X-ray tube is mounted, and the slip ring is formed in a ring shape. It is a combination of an electrode ring made of an electric conductor and an electrode brush (slider) made of an electric conductor that moves while contacting the electrode ring.

A conventional slip ring is a low pressure slip ring 1 shown in FIGS. 6(A) and 6(B). The low-pressure slip ring 1 has several electrode rings 4 fixed to the outer circumferential side of an insulator ring 3 via an adhesive such as epoxy resin.

(Problem to be solved by the invention) However, in the slip ring 1 shown in FIGS. 6(A) and 6(B), the electrode ring 4 is supported by the insulator ring 3 over its entire circumference, and the slip ring 1 shown in FIGS. A large diameter insulator ring 3 with good precision is required. However, it is difficult to process this insulator ring 3 with high precision and efficiency, causing an increase in costs.

This invention was made in consideration of the above-mentioned circumstances,
It is an object of the present invention to provide a slip ring that can accurately maintain the ring spacing between a plurality of electrode rings and that can simplify the electrode ring holding structure and reduce costs.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above-mentioned problems, the slip ring according to the present invention is provided with a plurality of insulating holders at intervals in the circumferential direction of the electrode ring, and the above-mentioned insulating holders are arranged in rows. It is provided with a plurality of ring holding grooves formed in a shape, and an electrode ring is inserted and supported in the ring holding groove.

Further, in order to solve the problems of the prior art described above, the slip ring according to the present invention provides a plurality of insulating holders at intervals in the circumferential direction of the electrode ring, and the above-mentioned insulating holder is provided on one side of the electrode ring. It is constructed by combining a holding frame facing the peripheral end surface of the electrode ring and an inter-electrode spacer interposed between the electrode rings.

(Function) In this slip ring, a plurality of insulating holders are provided at intervals in the circumferential direction of the electrode ring, and a plurality of ring holding grooves are formed in rows on the insulating holders to form a comb-like shape. By inserting and supporting the electrode ring in the ring holding groove, the electrode ring can maintain the ring spacing accurately between the comb teeth, while the insulating holder only needs to be configured in a comb tooth shape, can be integrally molded, and has a large diameter. Since the insulator ring is not required, the manufacturing cost can be reduced.

In addition, by constructing the insulating holder by combining the holding frame and the inter-electrode spacer, it is possible to accurately maintain the distance between the electrode rings using the inter-electrode spacer, while simplifying the structure of the insulating holder. It is possible to reduce costs.

(Example) Hereinafter, an example of a slip ring according to the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a principle diagram showing an example of a slip ring applied to an X-ray CT apparatus. This slip ring]0 is a low-pressure slip ring of, for example, 200 V to several hundred volts, and is provided on the outer periphery of the rotor ↑2 which is rotatably supported with respect to the stator 11 such as a gantry (frame). Stator 11
The space between the rotor 12 and the rotor 12 is filled with an inert gas such as SF6, and a high-pressure slip ring 13 for applying a voltage to the X-ray tube is provided in this space as necessary, for example.

On the other hand, a holding frame 5 is formed in a U-shape on the outer periphery of the rotor 12, and the insulating holding body upper circle is tightened to this U-shaped holding frame 1-5 with a fastener 17 such as a tightening port or nut. Fixed. At that time, the driven pulley 1 that rotates the rotor 12
8 is also collinear if necessary.

The insulating holder 16 is the electrode ring 19 of the slip ring 10
A plurality of, for example, eight, are provided at intervals in the circumferential direction. As shown in FIG. 3, the insulating holder 16 is formed in a comb-like shape, and a plurality of ring holding grooves 20 are provided in a row on the negative side. Several to several dozen electrode rings 19 are inserted into these ring holding grooves 20 and held.

Each electrode ring 19 is made of a conductive material such as brass, copper, or silver. For example, the electrode ring 19 has a ring outer diameter of 1200 m.
mφ, ring thickness of 3.5 mm, and ring width of about 20 mm, but these dimensions are not limited and may be appropriately selected as necessary.

Electrode brushes 24 as sliders are slidably electrically contacted with the outer peripheral surfaces of the plurality of electrode rings 19, respectively.

This slip ring 10 is constructed by arranging a plurality of comb-shaped insulating holder rollers at appropriate intervals in the circumferential direction of the plurality of electrode rings 18, and inserting the electrode rings 18 into the ring holding grooves 20 of the insulating holder]6. Since each electrode ring 18 is inserted and supported, the spacing between the electrodes is maintained by the comb teeth of the insulating holder 16. Therefore, each electrode ring 18 can accurately maintain the ring spacing between the electrodes. Electrode ring 18
Even if the electrode brush 24 rotates with the rotation of the rotor 12,
slides on the opposing electrode ring 18 and does not come off. In addition, since the insulating holder 16 only needs to have a plurality of ring holding grooves 20 formed in a row along the elongated direction on one side thereof, the insulating holder 16 can be integrally molded with a mold, etc., and the molding process is easy. Therefore, it is possible to reduce costs.

Next, a second embodiment of the slip ring IOA according to the present invention will be described with reference to FIG.

The slip ring IOA shown in this embodiment has a ring holding groove 30 formed in a comb-shaped insulating holding member "-6" in a tapered shape. The ring holding groove 30 is formed so as to gradually widen in a tapered shape from the groove bottom toward the groove opening. At that time, the tapered ring holding groove 30
One groove side surface may be used as a reference surface, and the other groove side surface may be an inclined surface that expands, or both groove side surfaces may be an inclined surface that expands.

Electrode ring 1 inserted into tapered ring holding groove 30
8A has a ring cross-sectional shape corresponding to the groove shape of the ring holding groove 30, and by inserting and supporting the electrode ring ↑8A into the ring holding groove 30, the electrode ring 18A is positioned, and the ring spacing between the electrode rings is adjusted with precision. Holds well. Also in this case, the insulating holder 16A can be molded using a metal mold in the same manner as shown in FIG. The other configurations are not substantially different from those shown in FIGS. 1 and 2, so their explanation will be omitted.

FIG. 5 shows a third embodiment of the slip ring of the present invention.

The slip ring IOB shown in this embodiment is provided with a plurality of, for example eight, insulating holders 16B at appropriate intervals in the circumferential direction of the electrode ring 18.
B is a combination of an insulating frame 33 that can come into contact with the inner peripheral end surface of the electrode ring 18 and an inter-electrode spacer 34 interposed between each electrode ring 18. The electrode rings 18 are held at precise ring intervals.

The inter-electrode spacer 34 may have its one side opposed to the insulating frame 34 and be supported in contact therewith, or may be fixed with an adhesive such as epoxy resin and may have a comb-like shape as a whole.

In the detailed explanation of this invention, an example was shown in which the slip ring was applied to an X-ray CT device, but this slip ring can also be used in current collectors of rotating machines such as DC motors and generators, solar cells of artificial satellites, and radars. , the rotary head of a video recorder, etc.

〔Effect of the invention〕

As described above, in the slip ring according to the present invention, a plurality of insulating holders are provided at intervals in the circumferential direction of the electrode ring, and the insulating holder has a plurality of ring holding grooves formed in a row. Since the electrode rings are inserted and supported in these ring holding grooves, the ring spacing between the electrode rings is held accurately by the comb teeth between the ring holding grooves, and there is no need for the insulating holding body to have a large diameter ring structure. This eliminates the need for large-diameter ring machining that requires precision, and the ring retaining groove can also be molded at the same time when the insulating holder is molded, making the molding process easy and cost reduction possible.

In addition, the insulating holder is constructed by combining a holding frame and an inter-electrode spacer, and even when each electrode ring is held by the inter-electrode spacer, each electrode ring maintains the ring spacing accurately, and maintains insulation. The molding of the body is also easy as there is no need to make a large diameter ring, and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a slip ring according to the present invention, and FIG. 2 shows the slip ring according to an X-ray C.
3 is a sectional view showing the slip ring shown in FIG. 1, and FIG. 4 shows a second embodiment of the slip ring according to the present invention, which corresponds to FIG. 3. The sectional view, FIG. 5, is the third slip ring according to the present invention.
FIGS. 6A and 6B are diagrams showing a conventional slip ring. 10, IOA, IOB... slip ring, 11...
Stator, 12...Rotor, 16.16A, 6B...
Insulation holder, 17... Fastener, 19. 19A... Electrode ring, 20. 30... Ring holding groove, 21... Electrode ring for power transmission, 22... Electrode ring for signal transmission, 24. ...Electrode brush, 33.Insulating frame, 34.Interelectrode spacer. Applicant's agent Hisatoshi Hata A certain illustration

Claims (1)

[Claims] 1. A plurality of insulating holders are provided at intervals in the circumferential direction of the electrode ring, and the insulating holder is provided with a plurality of ring holding grooves formed in a row, and the ring holding grooves are provided with a plurality of ring holding grooves. A slip ring characterized by having an electrode ring inserted and supported. 2. A plurality of insulating holders are provided at intervals in the circumferential direction of the electrode ring, and the insulating holders are interposed between the electrode ring and a holding frame facing one peripheral end surface of the electrode ring. A slip ring characterized by being configured in combination with a spacer.