JPH0568304A - Chimney pantograph - Google Patents

Abstract

PURPOSE:To suppress wind noise, to sustain constant pushing force and to suppress waved abrasion of trolley wire. CONSTITUTION:A multi-stage hydraulic cylinder 6 is mounted on a triangular supporting board 5 and a single wide streamline shoe body 9 is lifted/lowered by means of a vertically telescopic cylinder rod so that pushing force of the shoe body 9 against a trolley wire is sustained constant through hydraulic control thus realizing stabilized current collection. Furthermore, wind noise is suppressed by means of the streamline shoe body 9 and waving abrasion of trolley wire is suppressed by means of the single wide shoe body 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pantograph capable of reducing aerodynamic noise and suppressing wavy wear of a trolley wire.

[0002]

2. Description of the Related Art Conventionally, as a current collector for a train, for example,
A diamond-shaped pantograph in which an arm 30 supports a boat 31 as shown in a schematic view in FIG. 4 is widely used. Since this pantograph produces aerodynamic noise at high speeds, a pantograph cover 33 is provided to prevent noise generation as shown in the schematic diagram of FIG. In addition, boat 3
The one in which the friction plates are arranged in two rows in the traveling direction is widely used.

[0003]

By the way, in the Shinkansen, one of the major problems in improving the speed of the Shinkansen is the noise problem, and the pantograph wind noise is a major factor in implementing the measures. However, in a conventional pantograph such as a diamond-shaped pantograph, an arm supporting member that directly receives wind is complicatedly configured, and noise is likely to occur because the boat body has a complicated rectangular structure. Furthermore, in order to improve the followability between the trolley wire and the pantograph, most of the structures allow two sets of hulls to move independently, and one set of hulls is in two rows. Wavy wear of the trolley wire due to the plate width is occurring. When wavy wear occurs on the trolley wire,
The disconnection increases and the current collecting performance deteriorates.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a chemnipantograph capable of reducing wind noise and suppressing wavy wear of a trolley wire.

[0005]

A chemnipantograph of the present invention comprises a support plate supported by an insulator, a multi-stage hydraulic cylinder provided on the support plate, and a support arm driven by the multi-stage hydraulic cylinder. , A wide boat body elastically supported by the support arm and having a sliding plate on the upper surface thereof.

[0006]

According to the present invention, a multi-stage hydraulic cylinder is provided on a support plate supported by an insulator on a triangular base plate, a boat body is supported by a cylinder rod which extends and contracts in the vertical direction, and a constant pressure is applied by hydraulic control of the cylinder. The force is pressed against the hull against the trolley wire for stable current collection, and the multi-stage straight rod with a circular cross section raises and lowers the hull, and streamlines the hull to reduce wind noise, In addition, 1 hull
The number of trolley wire wavy wears is suppressed by making the area wide.

[0007]

1 is a perspective view of a chemni pantograph of the present invention, FIG. 2 is a detailed view of the chemni pantograph, and FIG. 3 is a view for explaining a hydraulic control system of the chemni pantograph.
In the figure, 1 is a base plate, 2, 3 and 4 are insulators, 5 is a support plate, 6 is a multi-stage hydraulic cylinder, 7 is a support arm, 8 is a spring, 9 is a boat body, 10 is a sliding plate, and 20 is oil. , 21 is a pipe, 22 is an accumulator, 23 is a pressure gauge, 24 is air, 25 is an air pipe, and 26 is an insulator.

As shown in FIG. 2 (c), a base plate 1 made of an iron plate or the like attached to the roof of a vehicle has a triangular shape, and insulators 2, 3 and 4 are provided at each vertex of the triangle. A support plate 5 having the same shape as the base plate is supported. The support plate 5 is provided with a hydraulically driven multi-stage hydraulic cylinder 6 described later,
The support arm 7 is vertically driven by the cylindrical rod of the cylinder. One boat 9 is supported by springs 8 at both ends of the support arm 7. The boat 9 is formed relatively wide, and a sliding plate 10 is provided on its upper surface.

In FIG. 3, which schematically shows a driving hydraulic system of such a pantograph, a multistage hydraulic cylinder 6 is shown.
The oil 20 is supplied by the accumulator 22 through the oil pipe 21 and is filled therein. Multi-stage hydraulic cylinder 6
A plurality of hollow-cylindrical rods are provided inside, and a hole is formed in the bottom surface of the rod except the uppermost rod so that oil can enter inside. Air 24 is sent into the accumulator 22 from an unillustrated compressor through an air pipe 25, the hydraulic pressure to the cylinder 6 is controlled by the air pressure, and the supply pressure at that time is detected by the pressure gauge 23. The accumulator 22 is provided on the roof of the vehicle, and the compressor (not shown) for supplying the air pressure can be the same as that used for braking the vehicle or opening and closing the door.

In such a structure, when the pantograph is raised, pressure is applied from the compressor, the hydraulic pressure to the cylinder 6 is raised through the pipe 21, the rods of each stage of the hydraulic cylinder 6 are raised, and the boat body 9 is operated. Reach height. At this time, a wide range of pantograph working height is secured by switching the number of rising stages of the hollow cylindrical rod of the multi-stage hydraulic cylinder 6, and a constant pressing force can be obtained by hydraulic control regardless of the height of the pantograph. ..

As a cause of the disturbance that fluctuates the pressing force of the boat, it is possible to consider the vibrational motion with the overhead line system, the effect of wind force, and the static height change of the overhead line, but the vibration frequency of the overhead line system is about 1 to 30 Hz. The wind disturbance is about several Hz, and the static change of the overhead line height is less than 1 Hz. With respect to fluctuations due to the pressing force of a low frequency of about several Hz such as the vibrational motion with this overhead line system and the influence of wind force, the fluctuation of the pressing force is detected by the pressure gauge 23 in the accumulator, and the fluctuation amount with respect to the target value is hydraulically adjusted. And a constant pressing force is secured by the air pressure control. For static changes in the overhead wire height, a trolley wire height detection sensor is provided to constantly measure the positional relationship with the trolley wire, and the hull height is set by hydraulic and pneumatic control to determine a certain value. It is possible to follow the variation from the set target value. Further, with respect to the overhead line vibration having a relatively high frequency of several tens Hz, the fluctuation amount is absorbed by the boat support spring to ensure the followability.

In this way, it is possible to control the pressing force at all times by hydraulic control during traveling. Further, regarding the aerodynamic noise characteristics, by making the boat body streamlined, the characteristics can be significantly improved, and the noise level can be reduced. Further, by using a wide contact plate for the boat body, a large effective contact area with the trolley wire can be obtained, the occurrence of corrugated wear is suppressed, the separation of wires is reduced, and stable current collection can be realized.

[0013]

As described above, according to the present invention, the wind noise can be reduced and the noise level can be lowered, and the contact area of the pantograph contact plate can be increased to suppress the occurrence of wavy wear of the trolley wire. , The disconnection can be reduced and the current collecting performance can be improved. Further, it is possible to realize a wide operating height by switching the number of stages of the multi-stage hydraulic cylinder, and to obtain a constant pressing force by hydraulic control. Further, since it is a cylindrical vertical rod support, it is possible to eliminate the direction dependency, and by making the base plate triangular, the mounting area can be reduced to about half.

[Brief description of drawings]

FIG. 1 is a perspective view of a chemni pantograph of the present invention.

FIG. 2 is a detailed view of a chemni pantograph.

FIG. 3 is a diagram showing a hydraulic control system of a chemni pantograph.

FIG. 4 is a schematic diagram of a diamond-shaped pantograph.

FIG. 5 is a schematic view of a pantograph cover of a diamond-shaped pantograph.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base plate, 2, 3, 4 ... Insulator, 5 ... Support plate, 6 ... Multistage hydraulic cylinder, 7 ... Support arm, 8 ... Spring, 9 ... Boat body,
10 ... Riding plate, 20 ... Oil, 21 ... Piping, 22 ... Accumulator, 23 ... Pressure gauge, 24 ... Air, 25 ... Air piping,
26 ... Insulator.

Claims (3)

[Claims] 1. A support plate supported by an insulator, a multi-stage hydraulic cylinder provided on the support plate, a support arm driven by the multi-stage hydraulic cylinder, and a support arm elastically supported by the support arm. A chemni pantograph equipped with one wide boat with a sliding board. 2. The multi-stage hydraulic cylinder has a plurality of hollow cylindrical rods having holes formed in a bottom surface thereof and vertically driven by hydraulic pressure, and is configured to be capable of switching the number of rising stages. Chemnipantograph. 3. The chemni pantograph according to claim 1, wherein the support plate is supported by an insulator at each vertex of a triangular base plate.