JPH0670441A - Car coupler-type cable connector - Google Patents

Abstract

PURPOSE:To shorten an operating time by fastening the tapered parts at both ends of a rubber-molded insulation cylinder inserted over the junction of a vehicle high-tension power cable simultaneously from both sides by spring units arranged in a taper shape and by fastening the outer periphery of the junction through a cap nut. CONSTITUTION:Power cabled 1, 1' to be connected are stripped stepwise and exposed cable conductors 2, 2' are inserted into negative-form and positive-form conductor contacts 24 and 23 and pressed to connection. A rubber-molded insulation cylinder 20 having a shield fitting 20a and tapered both ends is put on the outer periphery. Then, spring units 21, 21' inserted over respective cable sheathings are brought into contact with the taper face of the insulation cylinder 20 and the protective cases 25, 25' having stepped parts engaging with the spring units 21, 21' are moved from both sides to the junctions of the cables and connected with each other, and fastened by cap nuts 26. O-rings 19 are held between the sliding faces of the protective cases 25, 25' and tight fittings 28, 28'. Thus, an operating time for separation and contact is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupler type connection portion of a high voltage cable for a railway vehicle.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings. FIG. 2 is a cross-sectional view showing an example of a connecting portion using a rubber mold insulating cylinder. That is, the left and right power cables 1,
The end portion of 1'is stripped off to expose the cable conductors 2 and 2 ', and the cable conductors 2 and 2'are inserted so as to come into contact with the inside of the conductor connection pipe 3 and are pressure-contacted for connection. The conductor connecting pipe cover 4 and the spacer 5 are covered around this, and the mold insulating cylinder 6 is further covered on the outer periphery thereof.
The entire area around this is covered with a waterproof shrinkable tube 7. Then, the waterproof tape 8 is wound on this to form the connecting portion. The connection part using the rubber mold insulating cylinder configured in this way is mainly used for the connection part of 33 kV or less because it has electrical characteristics by the elastic force of rubber.

For higher voltage power cables, coupler-type connections using epoxy insulation as shown in FIG. 3 are used. That is, the left and right power cables 1, 1
The end portions of ′ are stripped off to expose the cable conductors 2 and 2 ′, and the cable conductors 2 and 2 ′ are inserted into the conductor connection fittings 9 so as to be in contact with each other, and pressure-contacted for connection. The rubber mold stress cones 11 and 11 'are covered with epoxy insulators 10 having tapered surfaces on the inner peripheral surfaces of both ends, and taper surfaces engaging with the tapered surfaces of the epoxy insulator are formed from the left and right sides on the outer circumference.
Insert the rubber mold stress cone 11,
The springs of the spring units 12 and 12 'that engage with the tightening fittings 13 are pressed against the back of the ′ to assemble. Reference numeral 14 is a protective metal fitting provided on the outer periphery of the connecting portion for fixing the tightening metal fitting 13.

Therefore, the connection portion is provided with the epoxy insulator 10 to receive the rubber mold stress cones 11 and 11 'on the tapered surface, and the rubber mold stress cones 11 and 11' are individually inserted into the cables 1 and 1 '. The tip end of the epoxy insulator 10 is pressed against the receiving portion of the epoxy insulator 10, and further the spring unit 12, 12 'is pressed from the rear portion of the rubber mold stress cone, whereby the epoxy insulator 10 and the rubber mold stress cone 11, 11'.
Interface with and rubber mold stress cone 11,11
′ 'And the interface between the cable insulators 2a and 2a' are brought into close contact with each other. The metal fittings for tightening the rubber mold stress cones 11 and 11 'must be assembled on each side.

[0005]

In the rubber-molded insulating tube type connection portion shown in FIG. 2 described above, the electrical characteristics of the connection portion are secured only by the tension force of the rubber, so that it is applicable to a high-voltage cable of 33 kV or more. I couldn't. Further, in the coupler type connection portion using the epoxy insulator shown in FIG. 3, it is difficult to uniformly tighten the spring units from both ends, and since the cables are assembled on one side with respect to the central conductor portion of the connection portion, the same. The work had to be carried out in two places, which was troublesome.

The present invention has been made in view of the above-mentioned problems, and solves the above-mentioned drawbacks of the prior art and achieves 33 kV.
It is an object of the present invention to provide a coupler-type connecting portion that can be applied to the above high voltage cable.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, in a connecting portion of a high voltage cable for a vehicle, a spring unit in which both end taper portions of a rubber mold insulating tube inserted into the power cable are arranged in a taper shape is used to simultaneously and evenly power the cable. The protective case provided on the outer periphery of the connection portion is configured to move the same distance at the same time by the cap nuts provided on the center line of the connection portion.
It is a vehicle coupler type cable connecting portion configured so that a protective case can be slid on an end fitting mounted on a cable sheath via an O-ring. Further, when both ends of the rubber mold insulating cylinder are tightened by the spring units, the central portion of the rubber mold insulating cylinder swells and the tightening force on the cable is weakened. Therefore, the ring-shaped collar is provided inside the center of the protective case.

[0006]

[Function] Since the spring units arranged at the tapered portions on both ends of the rubber mold insulating cylinder are configured to be movable by the same size at the same time, pressure can be uniformly applied to the interface between the cable insulator and the rubber mold insulating cylinder. The electrical characteristics of the connection part can be maintained and the applied voltage can be greatly improved. Further, the work time can be shortened by reducing the number of parts.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a vehicle coupler type high-voltage connection portion showing an embodiment. The power cables 1, 1 ′ to be connected are stripped off to expose the cable conductors 2, 2 ′.
A male conductor contact 23 is inserted into the cable conductor 2 ′, and a female conductor contact 24 is inserted into the cable conductor 2 and pressed and connected, and these are connected at the central portion with one touch.
A mountain-shaped rubber mold insulating cylinder 20 having a shield metal fitting 20a provided inside is covered on the outer periphery thereof. Then, the spring units 21, 21 'previously inserted on the respective cable sheaths are brought into contact with the tapered surface of the rubber molded insulating cylinder 20, and the step portion which is similarly engaged with the spring units 21, 21' is provided on the inner peripheral surface. The protective cases 25, 25 'are slidably moved to the center of the connecting portion and connected, and the connecting portion is tightened with the tightening cap nut 26 so that the spring units 21, 21' move to the left and right at a specified pressure. The rubber mold insulating cylinder 20 is configured to be tightened from the direction.

Further, the protective cases 25 and 25 'and the end fitting 2
An O-ring 19 is provided on the sliding surface with 8, 28 ', and the tips of the end fittings 28, 28' are fixed on the sheaths of the power cables 1, 1'with waterproof tape. Therefore, the protective cases 25 and 25 'can easily slide between the end fittings 28 and 28' by interposing the O-ring 19, and the waterproofness can be secured.

At this time, when the rubber mold insulating cylinder 20 presses against the spring units 21, 21 ', the central portion of the rubber mold insulating cylinder 20 swells and the tightening force on the power cable is weakened. It is preferable to provide a ring-shaped collar 27 on the inner side of the center of the ′ for assembling.

[0010]

As described above, the vehicle coupler-type cable connecting portion of the present invention can fasten the power cables at both ends by a single assembling operation, so that the working time can be shortened. Further, since the conductor connecting portion does not use an epoxy insulator, the weight is reduced. Further, it is often removed for vehicle use, but when removed, only one rubber-molded insulating cylinder is used as a replacement part, which improves efficiency.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a vehicle coupler type cable connection portion of an embodiment of the present invention,

FIG. 2 is a cross-sectional view showing the configuration of a conventional rubber mold insulating tubular connection part,

FIG. 3 is a cross-sectional view showing a configuration of a coupler-type cable connecting portion using a conventional epoxy insulator.

[Explanation of symbols]

 1,1 'Power cable 2,2' Cable conductor 20 Rubber molded insulating tube 23 Male contact 24 Female contact 25,25 'Protective case 26 Tightening cap nut 27 Collar 28, 28' End fitting 19 O-ring

[Procedure amendment]

[Submission date] October 2, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Patent application title: Coupler type cable connection device for vehicle

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshiyasu Hagiwara 1-4-1, Mei Station, Nakamura-ku, Nagoya, Aichi “Tokai Passenger Railway Co., Ltd.” (72) Masayuki Sasaki, Hidaka, Hitachi City, Ibaraki Prefecture 5-1-1 Hachi "Hitachi Cable Co., Ltd. Hidaka Factory" (72) Inventor Takashi Matsushima 5-1-1 Hidaka-cho, Hitachi City, Ibaraki "Hitachi Cable Co., Ltd. Hidaka Factory" (72) Inventor Sachio Tazawa 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture "Hitachi Cable Co., Ltd. Hidaka Plant"

Claims (2)

[Claims] 1. At a connection portion of a high-voltage cable for vehicle,
The rubber molded insulation tube inserted on the power cable is configured so that both ends of the taper are tapered at the same time by the spring unit, and the power cable is tightened evenly at the same time, and the protective case on the outer circumference of the connection is provided on the center line of the connection. For vehicle use, the left and right protective cases are configured to move at the same distance at the same time by the cap nuts, and the protective cases can be slid on the end fittings mounted on the cable sheath via the O-rings. Coupler type cable connection part. 2. A ring-shaped collar is provided inside the center of the protective case when the rubber mold insulating cylinder is tightened at both ends with spring units because the central part of the rubber molded insulating cylinder swells and the tightening force on the cable is weakened. The vehicle-type coupler-type cable connection section described in 1.