JPH0746705A - Current collector - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To improve the point that the insulation separation distance is a dead space and has not been used at all, and to effectively use this dead space. [Structure] An upright cylinder 4 and a piston rod 5, a current collector having a current collecting boat 6 attached to the upper part of the piston rod and an underframe 3 to which the cylinder is attached as main members, and the underframe for a vehicle body. In the current collector composed of the support insulator 2 which is insulated and supported from above, the entire surface of the cylinder tubular body projecting downward from the underframe of the cylinder of the current collector is covered with the insulating member 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector for an electric vehicle.

[0002]

2. Description of the Related Art A conventional one is shown in FIG. 2, in which 1 is a roof surface of a vehicle body, 2 is a support insulator for insulatingly supporting a current collector from the vehicle body, 3 is an underframe of the current collector, and 4 is a platform. A cylinder attached to the frame, 5 is a piston rod, 6 is a current collecting boat attached to the upper end of the piston rod, 7 and 8 are air pipes, and the support insulator 2 has a through hole in the center and air. It forms part of the circuit. Further, 9 indicates an overhead line. Next, the operation of the conventional current collector will be described. When compressed air is supplied to the cylinder cylinder 4 from the air supply pipe 7 from the folded state of the current collector, the piston rod rises, the upper surface of the current collector contacts the overhead wire with a predetermined pushing force, and the vehicle collects current. Run. Since the overhead wire is normally pressurized to a high voltage, when the current collector contacts the overhead wire, the entire current collector is pressurized to the overhead wire voltage. The underframe 3 of the current collector, which is pressurized to a high voltage, is insulated from the roof surface 1 of the vehicle body by the support insulator 2, and the lower end of the cylinder 4 has a predetermined insulation separation distance L from the vehicle roof surface. It is insulated by space. The insulation separation distance L is, for example, 300 mm when the overhead wire voltage is 25 KV. Further, the height of the support insulator is also determined by securing the creeping insulation distance transmitted on the surface. For example, the overhead line voltage 25
In case of kv, the height of supporting insulator is about 600 mm.

[0003]

However, since the upper limit height of the current collector installed in the vehicle when folded is not more than the vehicle limit, the dimension in the height direction of the space where the current collector can be arranged is the vehicle. It is between the limit height and the height of the roof surface of the vehicle body, and in the conventional current collector, in order to secure the above-mentioned space insulation separation distance L, the dead space in which the L dimension is completely dead in the space where the current collector can be arranged. That was a drawback. Further, the value of the L dimension is 300 mm when the overhead wire voltage is 25 kv, which is a big limitation in designing the structure of the current collector.

[0004]

DISCLOSURE OF THE INVENTION The present invention has improved the point that the insulation separation distance has become a dead space and has not been used at all in the conventional current collector, and the dead space is effectively used to The present invention provides a current collector that makes the configuration of the current collector easier. As a means for this, a current collector is constructed by covering the entire surface of the portion of the current collector cylinder cylinder projecting below the lower surface of the underframe of the current collector with a member having high insulation strength such as an insulator. is there.

[0005]

In the current collector configured as described above, the insulator material enclosing the cylinder tube has a very high penetration insulation strength, so that as an example, the insulator thickness is about 10 mm even for an overhead wire voltage of 25 KV. It is possible to insulate sufficiently if it has sufficient insulation strength, and by encapsulating the entire surface of the cylinder tube with such a material, it is safe enough to set the conventional space insulation distance of 300 mm to about 50 mm.

Therefore, in this case, a space of 250 mm in the height direction including the encapsulating member can be utilized as a space for disposing the current collector. Also, as the space of the current collector cylinder cylinder excluding the encapsulating member, it is possible to obtain a space in the height direction of 200 mm or more as compared with the conventional one, and it is possible to increase the stroke of the current collector cylinder. There are significant advantages to height dimensional configurations. Regarding the creepage insulation distance, it is sufficiently safe because it has double insulation of the space insulation separation distance between the insulator lower surface and the vehicle body roof surface and the creepage insulation distance of the insulator surface.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of a current collector of the present invention. In the figure, the same reference numerals as those in FIG. 2 indicate parts having the same configurations and functions. In FIG. 1, reference numeral 10 denotes an insulator attached to the underframe 3 which covers the entire surface of the cylinder tubular portion 4a protruding downward from the lower surface of the underframe 3 of the cylinder 4. The insulation separation distance S between the lower surface of the insulator and the roof surface of the vehicle body is made much smaller than the separation distance L in the conventional current collector shown in FIG.

Since the operation of this device is exactly the same as that of the conventional product shown in FIG. 2, its explanation is omitted.
The function of this device will be described below.
Since the insulator that covers the entire surface of the cylinder body 4a has a very large penetration insulation strength, the insulator having a sufficient thickness for the penetration insulation strength is formed on the entire lower surface of the cylinder body, which is a conductive member. In the case of encapsulating with, the separation distance S between the lower surface of the insulator and the roof surface of the vehicle body is made smaller than the separation distance L between the lower end of the cylinder tubular portion made of a conductive material in the conventional current collector and the roof surface of the vehicle body. However, the insulation strength is sufficient.

Further, the creepage insulation distance of the insulator is sufficiently safe because it is a double insulation of the space separation distance between the insulator lower surface and the vehicle body roof surface and the creepage insulation distance of the insulator surface. Therefore, by covering the entire lower surface of the cylinder tubular body with the insulator, it is possible to configure the current collector by utilizing most of the space insulation distance L dimension which has been a dead space in the past. In the present embodiment, the material of the member that covers the entire lower surface of the cylinder cylinder is described as an insulator, but the function of the present invention is the same even if a material other than the insulator is used as a material having high penetration insulation strength. is there.

[0010]

Since the current collector of the present invention has the above-described structure and functions, most of the space separation distance, which has been a dead space in the past, can be utilized as the constituent space of the current collector. By increasing the stroke of the current collector cylinder or by increasing the stroke of the current collector support spring, the operating range in the height direction of the current collector can be increased, which has a great effect on the configuration of the current collector. Have.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of implementation of a current collector of the present invention.

FIG. 2 is a configuration diagram showing an example of a conventional current collector.

[Explanation of symbols]

 1 Roof surface of vehicle body 2 Support insulator 3 Underframe 4 Cylinder 5 Piston rod 6 Current collector 10 Insulator

Claims (1)

[Claims] 1. An upright cylinder and a piston rod, a current collector mounted on the upper portion of the piston rod, and a current collector mainly composed of an underframe to which the cylinder is attached, and the underframe is insulated from a vehicle body. A current collector comprising a supporting insulator that supports the current collector, characterized in that the entire surface of the cylinder tubular body projecting below the underframe of the cylinder of the current collector is covered with an insulating member.