JP3197954B2 - Coupler type cable connection device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupler-type connecting device for high-voltage cables for railway vehicles.

[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 connection device using a rubber mold insulating cylinder. That is, the ends of the left and right power cables 1 and 1 ′ are peeled off to expose the cable conductors 2 and 2 ′, and are inserted into the conductor connection pipe 3 so as to be in contact with each other to be pressed and connected. The conductor connection pipe cover 4 and the spacer 5 are covered therearound, and the mold insulating cylinder 6 is further covered around the outer periphery thereof.
Then, the waterproof tape 8 is wound from above to form the connection device . A connecting device using a rubber mold insulating tube configured as described above is mainly used for a connecting portion of 33 kV or less because the device has electrical characteristics due to the tension of rubber.

[0003] In the case of higher voltage power cables, a coupler type connection using an epoxy insulator as shown in FIG.
The device is used. That is, the left and right power cables 1
The ends of 1 ′ are stripped to expose the cable conductors 2 and 2 ′, and are inserted into the conductor connection fitting 9 so as to be in contact with each other by pressure contact. Rubber mold stress cones 11 and 11 ′ each having an outer peripheral surface covered with an epoxy insulator 10 having a tapered surface on inner peripheral surfaces at both ends, and having a tapered surface that engages with the tapered surface of the epoxy insulator from the left and right ends.
And insert the rubber mold stress cones 11 and 1
The back of 1 'is assembled by pressing the springs of the spring units 12, 12' engaging with the fasteners 13, respectively. Reference numeral 14 denotes a protective fitting provided on the outer periphery of the connecting portion for fixing the fastening fitting 13.

[0004] Therefore, the epoxy insulator 10 a connecting device 'provided receiving portion of the tapered surface, each cable 1,1' rubber mold stress cone 11, 11 rubber mold stress cone 11, 11 which are inserted individually into ' Is pressed against the receiving portion of the epoxy insulator 10, and
The epoxy insulator 10 and the rubber mold stress cones 11, 1 are pressed by the spring units 12, 12 'from the rear of the rubber mold stress cone.
1 ′ interface and rubber mold stress cone 11,
The interface between 11 ′ and the cable insulators 2a, 2a ′ is brought into close contact. In addition, the assembly of metal fittings for tightening the rubber mold stress cones 11 and 11 'must be performed for each side.

[0005]

In the rubber-molded insulating cylinder type connection device shown in FIG. 2 described above, the electrical characteristics of the connection portion are ensured only by the tension force of the rubber.
It could not be applied to the above high-voltage cables. Further, a coupler type connection device using an epoxy insulator shown in FIG.
In this case , it is difficult to uniformly tighten the spring unit from both ends, and the cable must be assembled on each side to the center conductor of the connection part. Was.

[0006] The present invention has been made in view of such a point, and solves the above-mentioned disadvantages of the prior art.
It is an object of the present invention to provide a coupler type connection device which can be applied to the above high voltage cable.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a power cable for a high voltage cable for a vehicle, in which a rubber molded insulating tube inserted on the power cable has a tapered spring unit in which both ends are tapered. The protective case provided on the outer periphery of the connecting part is configured so that the left and right protective cases can be simultaneously moved by the same distance by the cap nuts provided on the center line of the connecting part. 2 is a coupler type cable connecting device for a vehicle configured so that a protective case can slide through an O-ring.

[0008]

[Function] Since the spring units arranged at both ends of the rubber mold insulating cylinder taper portion can be simultaneously moved by the same dimension, pressure can be uniformly applied to the interface between the cable insulator and the rubber mold insulating cylinder. The applied voltage can be greatly improved while maintaining the electrical characteristics of the connection portion. Further, the working time can be shortened by reducing the number of parts.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a vehicle coupler type high voltage connection.
It is a cross section of a device . Power cable 1, 1 'to be connected
Are respectively stripped to expose the cable conductors 2 and 2 '. Male conductor contacts 23 are provided on the cable conductors 2 and 2 '.
The female conductor contacts 24 are inserted into the cable conductor 2 and pressed and connected to each other, and these are connected with one touch at the center. The outer periphery is covered with a mountain-shaped rubber mold insulating cylinder 20 having a shield fitting 20a provided therein. And
The spring units 21 and 21 'previously inserted on the respective cable sheaths are brought into contact with the tapered surface of the rubber mold insulating cylinder 20, and the spring units 21 and
A protective case 25 having a step on its inner peripheral surface for engaging
25 'is slid to the center of the connecting portion to be connected, and this connecting portion is tightened with the tightening cap nut 26 so that the spring units 21 and 21' are rubber-molded insulating cylinders from the left and right directions at a specified pressure. 20 is configured to be tightened.

The protective cases 25, 25 'and the end fitting 2
An O-ring 19 is provided on the slide surface between the power supply cables 8 and 28 ', and the ends of the end fittings 28 and 28' are fixed on the sheath of the power cables 1 and 1 'with waterproof tape. Therefore, the protective sheath 25, 25 'can easily slide between the end fittings 28, 28' through the O-ring 19, and furthermore, waterproofness can be secured.

[0011]

As described above, since the coupler cable connecting device for a vehicle according to the present invention can tighten the power cables at both ends by one assembly work, the working time can be shortened. Further, the weight is reduced because no epoxy insulator is used for the conductor connection part. Furthermore, although it is often removed for a vehicle, only one rubber-molded insulating cylinder is required to replace the removed part, which improves the efficiency.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a vehicle-type coupler cable insulating device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view showing the configuration of a conventional rubber-molded insulating cylinder type connection device ;

FIG. 3 is a cross-sectional view showing a configuration of a conventional coupler-type cable connection device using an epoxy insulator.

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiyasu Hagiwara 1-1-1 Meiji Station, Nakamura-ku, Nagoya-shi, Aichi "Tokai Passenger Railway Co., Ltd." (72) Inventor Masayuki Sasaki Hidaka, Hitachi City, Ibaraki Prefecture 5-1-1, Hachidachi-cho, Hidaka Electric Works Co., Ltd. (72) Inventor Takashi Matsushima 5-1-1, Hidaka-cho, Hitachi-City, Ibaraki Pref. 72) Inventor Sachio Tazawa 5-1-1, Hidaka-cho, Hitachi City, Ibaraki Prefecture “Inside the Hidaka Factory of Hitachi Cable Ltd.” (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 15 / Ten

Claims (1)

(57) [Claims] In a connecting portion of a high voltage cable for a vehicle, the power cable is simultaneously and uniformly tightened by a spring unit in which a tapered portion at both ends of a rubber mold insulating tube inserted on the power cable is arranged in a tapered shape. The left and right protection cases are simultaneously moved by the same distance by the cap nuts provided on the center line of the connection part, and the protection case is provided on the end fitting attached on the cable sheath via an O-ring. A vehicle-type coupler-type cable connection device characterized in that it is configured to be able to slide.