JPH0785941A - Manufacture of slip ring assembly - Google Patents

Abstract

PURPOSE:To manufacture a slip ring assembly with easy operation of injecting and finishing, by forming each slip ring element from a conducting material to whose inside surface of a lead welded, laminating such slip ring elements insulation rings made of epoxy resin alternately in a die in a cylindrical form, injecting epoxy resin into the laminate, and subjecting to a finishing process. CONSTITUTION:Slip ring elements 12 made of conductive material and insulation rings 13 of epoxy resin are alternately inserted in laminate in a die 10 in the form of a cylinder having the same inside diameter, for example 5.0mm, over the whole length, and into this laminate, epoxy resin is injected. This does not require inclusion molding of insulation rings 13, but merely a shaping process of a supporting shaft 14, so that injection of the epoxy resin can be done easily, and further because the outer surface of the molding is equipped with less surface unevenness, the finish trimming with machining and polishing do not require much labor. The die 10 used therein has no ring groove internally to allow use of a simple structure in the form of a cylinder having the same inside diameter over the whole length, which should suppress the cost for dies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a slip ring assembly used in various devices using a rotary gyro.

[0002]

2. Description of the Related Art A slip ring assembly used in various devices utilizing a rotary gyro is a vertical slip ring assembly that slides around a cylinder. In many vertical slip ring assemblies, slip rings made of a conductive material and insulating materials are alternately laminated. To manufacture this slip ring assembly, an assembly type is used when the number is small, and a mold type is used when the number is large.

In order to manufacture a slip ring assembly by an assembly method, as shown in FIG. 2, a slip ring 1 made of a conductive material and an insulating ring 2 having an adhesive applied to both upper and lower surfaces and an inner peripheral surface are alternately made of epoxy resin. The lead wire 4 which is fitted to the support shaft 3 and laminated and adhered, and which is welded to the inner peripheral surface of the slip ring 1 is led out to the outside through a vertical groove 5 on the outer periphery of the support shaft 3, and then the outer surface is cut. , Polished and finished.

In order to manufacture the slip ring assembly by a mold method, as shown in FIG. 3, the lead wire 4 is welded to the inner peripheral surface in the annular groove 7 provided in the molding die 6 at regular intervals. After fitting the slip ring 1 made of a conductive material and concentrating the lead wires 4 and leading them out of the molding die 6, epoxy resin is injected into the molding die 6 to form the insulating ring 2 '. At the same time, the support shaft 3'is molded, and then taken out from the molding die 6 and the outer surface is cut and polished to finish.

By the way, in the method of manufacturing the assembly type slip ring assembly, although the number is small, it takes a lot of manual labor and productivity is poor. On the other hand, in the method of manufacturing the mold type slip ring assembly, the mold cost is high because the internal shape of the mold is complicated, and the mold 6 is used.
Since the insulating ring 2'is molded between the slip rings 1 set inside, it is very difficult to inject the epoxy resin so as to be densely packed, and further, the outer surface of the molded product molded by the mold has unevenness. Due to the large number, it takes time to finish.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a method for manufacturing a slip ring assembly which is inexpensive in mold cost, easy to inject epoxy resin, and easy to finish.

[0007]

A method of manufacturing a slip ring assembly according to the present invention for solving the above-mentioned problems is achieved in a cylindrical molding die whose inner diameter is the same throughout its entire length.
Slip rings made of a conductive material with lead wires welded to the inner surface and insulating rings of epoxy resin are alternately inserted and laminated, and then epoxy resin is injected into this laminated body to integrate and form a support shaft. After that, it is characterized in that it is taken out from the molding die, and the outer surface is cut and polished to finish and shape.

[0008]

As described above, according to the method of manufacturing the slip ring assembly of the present invention, the slip rings made of the conductive material and the insulating rings of the epoxy resin are alternately inserted and laminated in the molding die, and the epoxy resin is placed in the laminated body. Since it is not necessary to mold the insulating ring, it is only necessary to mold the support shaft, so it is easy to inject the epoxy resin, and since the outer surface of the molded product has few irregularities,
It takes no effort to finish and shape the cutting and polishing. Moreover, since the molding die used in the method of manufacturing the slip ring assembly of the present invention has no annular groove inside and has a simple cylindrical structure having the same inner diameter over the entire length, the die cost is low.

[0009]

EXAMPLE An example of a method for manufacturing a slip ring assembly according to the present invention will be described with reference to FIG. 1 in a cylindrical molding die 10 having the same inner diameter of 5.0 mm over the entire length.
5.0 mm outer diameter and 4.0 m inner diameter with lead wire 11 welded to the inner surface
m, thickness 0.7mm, 4 slip rings 12 made of Au-Cu 10wt% and 5 insulation rings 13 made of epoxy resin with outer diameter 5.0mm, inner diameter 3.5mm, thickness 0.7mm are alternately inserted and laminated. Then, after leading the lead wire 11 out of the upper mold die 10 after focusing, and screwing the lead wire 11 to the upper end portion in the mold die 10,
Epoxy resin is injected into the laminated body of slip ring 12 and insulating ring 13 to integrate them, and a support shaft with an outer diameter of 4.0 mm
Mold 14 and then remove it from inside mold 10
The outer surface was cut, ground and finish-shaped to obtain a slip ring assembly.

As can be seen from this embodiment, in the method of manufacturing a slip ring assembly of the present invention, slip rings 12 made of a conductive material and insulating rings 13 made of epoxy resin are alternately inserted and laminated in a molding die 10. Since the epoxy resin is injected into the laminated body, it is not necessary to mold the insulating ring 13 and only the support shaft 14 is molded, so that the epoxy resin can be easily injected.
Since there are few irregularities, it does not take time to finish and shape the cutting and polishing. Moreover, since the molding die 10 used in the method for manufacturing the slip ring assembly of the present invention has no annular groove inside and has a simple cylindrical structure having the same inner diameter over the entire length, the die cost becomes low. .

[0011]

As described above, according to the method of manufacturing the slip ring assembly of the present invention, the molding method is such that the epoxy resin can be easily injected, the finishing is easy, the die cost is low, and the dimensional accuracy is low. It is possible to obtain a good slip ring assembly.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a method for manufacturing a slip ring assembly of the present invention.

FIG. 2 is a view showing a method for manufacturing a conventional assembly-type slip ring assembly.

FIG. 3 is a view showing a method of manufacturing a conventional mold type slip ring assembly.

[Explanation of symbols]

 10 Mold die 11 Lead wire 12 Slip ring 13 Insulation ring 14 Support shaft

Claims (1)

[Claims] 1. A slip ring made of a conductive material having a lead wire welded to its inner peripheral surface and an insulating ring made of an epoxy resin are alternately inserted and laminated in a cylindrical molding die having the same inner diameter over the entire length, Next, slip is characterized by injecting epoxy resin into this laminated body to integrate it and molding the supporting shaft, and then taking it out from the molding die, cutting and polishing the outer surface and finishing shaping. Ring assembly manufacturing method.