JPH05176403A - Railway vehicle current collector - Google Patents

Abstract

(57) [Summary] [Structure] A support body 4 that is attached to the roof 3 of a railway vehicle and expands by supplying gas, and a support body 4 that is supported by the support body 4 and is pressed against the overhead wire 13 by the expansion of the support body 4. And an electric member. [Effect] It is possible to reduce noise during traveling and press the current collecting member against the overhead wire with an appropriate force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway vehicle current collector mounted on the roof of a railway vehicle for collecting electricity from an overhead line.

[0002]

2. Description of the Related Art In a railway vehicle, a roof is equipped with a current collecting device usually called a pantograph for collecting current from an overhead line. The current collecting device includes a current collecting member called a current collecting boat, which is in contact with an overhead line, and receives electric power from the overhead line via the current collecting member. In this case, since the overhead wire vibrates up and down due to wind and the like, the current collecting boat is attached to the roof of the railway vehicle so as to be vertically movable via a link mechanism, and is pressed against the overhead wire by a spring.

[0003]

With the recent increase in the speed of railway vehicles, noise due to the turbulence of the air flow due to the current collector has become a problem. In particular, since the current collecting boat runs along the lateral direction facing the traveling direction of the vehicle, the turbulence of the air flow due to the current collecting boat causes noise. Therefore, it has been proposed to reduce the noise by reducing the turbulence of the air flow by making the cross-sectional shape of the current collecting boat a shape with a small air resistance such as a streamline type. However, although the turbulence of the air due to the current collecting boat can be reduced in the current collecting boat having such a shape, the lift force acting on the current collecting boat becomes large and an excessive pushing force may be generated to damage the overhead line. Therefore, a mechanism is introduced to drive the current collector boat up and down by a servomotor or pneumatic drive so as to follow the displacement of the overhead wire in the height direction, and to set the force acting on the overhead wire to an appropriate magnitude (about 5 kgf to 10 kgf). Is being considered.

However, since the overhead line vibrates at a frequency of more than ten hertz, it is very high in response to control the vertical height of the current collecting boat so as to follow the displacement of the overhead line, and it is high in order to prevent sparks due to disconnection. Tracking with a position accuracy (1 mm or less) is required, and the control system becomes complicated.

Further, the shape of the link mechanism and the spring for attaching the current collector boat to the roof is complicated, and the turbulence of the air flow due to these is also a cause of noise.

It is an object of the present invention to provide a railway vehicle current collector which can solve the above-mentioned problems of the prior art.

[0007]

A feature of the present invention is that it is mounted on the roof of a railway vehicle and expands by the supply of gas, and an overhead line supported by this support and expanded by the support. And a current collecting member to be pressed against.

[0008]

According to the structure of the present invention, since the support for supporting the current collecting member is expanded by the supply of gas, the shape can be made smooth with respect to the air flow, and the air resistance is small and a large lift is generated. It can be formed into a non-shaped shape, and since it has elasticity by expansion, the current collector can be pressed against the overhead wire by elastic movement.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

The current collector 1 for a railroad vehicle shown in FIGS. 1 to 3 relates to the first embodiment of the present invention, and includes a support 4 attached to a roof 3 of the railroad vehicle. The support 4 is mainly composed of a base member 5, a rubber diaphragm 6, and a ceramic cover 7. Its base member 5
Has a container shape having a bottom wall 5a and a peripheral wall 5b, and is fixed to the roof 3 via an insulator 18. The diaphragm 6 has a tubular shape, and a flange 6 formed on the outer periphery of the lower end.
a is a peripheral groove 5 formed on the inner periphery of the peripheral wall 5b of the base member 5.
It is fitted in c and fixed by an adhesive or the like, and the upper end is fitted in a peripheral groove 7a formed in the inner circumference of the cover 7 and fixed by an adhesive or the like. As a result, the airtight chamber 8 is formed inside the support body 4. The cover 7 has a shape that has low air resistance and does not generate a large lift. The outer periphery of the base member 5 and the diaphragm 6 is covered with a plate 16 made of FRP, and the plate 16 is fixed to the roof 3 and the cover 7 so as to be smoothly connected to each other. Thereby, the current collector 1
The noise can be reduced by reducing the turbulence of the air.

The airtight chamber 8 is connected to a compressed air source 10 built in the railcar 2 via an air pipe 9, and a pressure control valve 11 composed of a pressure reducing valve is interposed in the air pipe 9 midway. There is. As a result, the support 4 expands when compressed air is supplied to the airtight chamber 8. When the pressure in the airtight chamber 8 becomes constant, air is released from the pressure adjusting valve 11 into the atmosphere, so that the pressure in the airtight chamber 8 is kept at a constant value.

A current collecting member 12 is attached to the upper portion of the cover 7. The current collecting member 12 is composed of two brushes 12a extending in the vehicle width direction, and each of them has a cover 7
It is fitted into the recess 7b formed on the upper surface of the and is fixed by bolts or the like. The current collecting member 12 is pressed against the overhead wire 13 for power supply due to the expansion of the support body 4,
As a result, electric power is taken in from the overhead line 13. The electric power is transmitted to the vehicle side by a power transmission wire 15 attached via an insulator 14 arranged in the airtight chamber 8. The pressure in the airtight chamber 8 is set by the pressure control valve 11 so that the pressing force of the current collector 12 against the overhead wire 13 by the support 4 has an appropriate value. Thereby, the current collecting member 12
Is pressed against the overhead wire 13 with an appropriate force.

A railway vehicle current collector 31 shown in FIGS. 4 to 7.
According to the second embodiment of the present invention, the roof 33 of the railway vehicle 32 is
And a support 34 attached thereto. The support 34 is mainly composed of a base member 35 and a rubber cover 36. The base member 35 has a container shape having a bottom wall 35a and a peripheral wall 35b, and is fixed to the roof 33 via an insulator 48. The peripheral edge of the rubber cover 36 is fitted into a peripheral groove 35c formed on the inner periphery of the peripheral wall 35b of the base member 35, and is fixed by an adhesive or the like. As a result, the airtight chamber 38 is formed inside the support body 34.

The airtight chamber 38 is connected via an air pipe 39 to a compressed air source 40 built in the railway vehicle 32, and a pressure control valve 41 constituted by a pressure reducing valve is interposed in the middle of the air pipe. . As a result, the support 34 expands when compressed air is supplied to the airtight chamber 38. When the pressure in the airtight chamber 38 becomes a constant pressure, air is released from the pressure control valve 41 into the atmosphere, so that the pressure in the airtight chamber 38 is maintained at a constant value. Due to the expansion of the support 34, the cover 36 has a shape with a small air resistance and a large lift does not occur. The outer periphery of the base member 35 is covered with a plate 36 made of FRP, and the plate 36 is fixed to the roof 33 and the cover 36 so as to be smoothly continuous. Thereby, the turbulence of the air due to the current collector 1 can be reduced and noise can be reduced.

A current collecting member 42 is attached to the upper portion of the cover 36. As shown in FIG. 7, the current collecting member 42 is composed of a large number of disc-shaped brushes 42a, which are fixed to the cover 36 with bolts or the like. The brushes 42a are connected to each other by conductors 42b. The current collecting member 42 is pressed against the overhead wire 43 for power supply due to the expansion of the support 34, and thereby takes in power from the overhead wire 43. The electric power is transmitted to the vehicle side by a power transmission wire 45 attached via an insulator 44 arranged outside the airtight chamber 38. The pressure in the airtight chamber 38 is set by the pressure control valve 41 so that the pressing force of the current collecting member 42 against the overhead wire 43 by the support 34 has an appropriate value. As a result, the current collecting member 42 is pressed against the overhead wire 43 with an appropriate force.

The present invention is not limited to the above embodiment. For example, the support may be inflated with air, or in other words, may be inflated with gas.

[0017]

The railcar current collector of the present invention supports a current collecting member by a support body that expands when gas is supplied and presses it against an overhead line. Therefore, turbulence of air during traveling is small and a large lift force is exerted. It is possible to reduce the noise and to press the current collecting member against the overhead wire with an appropriate force.

[Brief description of drawings]

FIG. 1 is a perspective view of a current collector according to a first embodiment.

FIG. 2 is a cross-sectional view of the current collector according to the first embodiment.

FIG. 3 is a vertical cross-sectional view of the current collector according to the first embodiment.

FIG. 4 is a perspective view of a current collector according to a second embodiment.

FIG. 5 is a cross-sectional view of the current collector according to the second embodiment.

FIG. 6 is a vertical sectional view of a current collector according to a second embodiment.

FIG. 7 is a perspective view of a current collecting member according to a second embodiment.

[Explanation of symbols]

 3, 33 Roof 4, 34 Support 12, 42 Current collecting member 13, 43 Overhead line

Claims (1)

[Claims] 1. A support, which is attached to a roof of a railway vehicle and expands by supplying gas, and a current collecting member which is supported by the support and is pressed against an overhead wire by expansion of the support. Current collector for railway vehicles.