JPH054581A - Soundproofing device for vehicle current collector - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to reduce noise generated from the current collector 1 in a high-speed vehicle. [Structure] The structure of the present invention comprises a sound insulation cover 3 for a pantograph.
Air bypass part 4 whose cross section can be changed to the front and rear walls
And a means 7 for driving it and a controller 8. The rectifying plate 5 is rotated by the driving means, and the flow velocity of the traveling wind hitting the current collector 1 is reduced by the air passing through the air bypass section 4. According to the present invention, the effect of reducing the noise generated by the pantograph by the front and rear walls of the pantograph sound insulation cover 3 which is restricted by the vehicle limit can be further improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof structure for a current collector of a vehicle, and more particularly to soundproofing of a current collector for a vehicle suitable for a railway vehicle traveling at high speed.

[0002]

2. Description of the Related Art As a device for shielding noise generated from a current collector provided on a vehicle body of a railway vehicle, for example, as described in Japanese Utility Model Publication No. 1-89221, a structure in which a soundproof cover surrounds the current collector. Are known. The soundproof cover has a structure that shields sliding noise between the sliding plate of the current collector and the overhead wire (soundproof cover in the vehicle side direction) and also has a sound reduction function (soundproof cover in the vehicle traveling direction side). It was

[0003]

In the above-mentioned prior art, the soundproof cover is of a fixed type, and in the soundproof cover on the vehicle traveling direction side, the sound reducing function is achieved by reducing the flow velocity of the air hitting the current collector. It had a structure that also had. In such a structure, there is a limitation in the size of the soundproof cover due to the vehicle limit, and there is a problem that the noise generated from the current collector cannot be reduced according to all vehicle traveling speeds. This tendency was particularly noticeable when the size of the soundproof cover was restricted by the arrangement of devices on the roof of the vehicle body.

The object of the present invention is to effectively reduce the noise generated from the current collector, and even when the size of the soundproof cover is restricted by the arrangement of devices on the roof of the vehicle body. It is an object of the present invention to provide a soundproof structure for a vehicle current collector that can reduce noise effectively.

[0005]

In order to achieve the above object, a passage for bypassing air from the lower part to the upper part is provided in the front and rear covers in the traveling direction for insulating noise generated from a current collector. .

[0006]

With the air flowing upward from the air bypass passage, the flow velocity of the traveling wind hitting the current collector is reduced, and the noise generated is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 is a pantograph which constitutes a current collector and is supported by an insulator. Reference numeral 2 is a vehicle body, and the pantograph 1 is installed on the roof. Reference numeral 3 denotes a pantograph cover (hereinafter, simply referred to as a pantograph cover) which is provided around the pantograph 1 and surrounds the pantograph 1. The pantograph covers 3 are installed around the pantograph 1, that is, on both sides in the vehicle width direction and both sides in the vehicle longitudinal direction.

The upper surface of the panter cover 3 in the vehicle longitudinal direction is an inclined surface 5 which is retracted with respect to the traveling direction. The inclined surface 5 effectively repels the wind that hits the pantograph 1 when receiving the traveling wind A.

An air bypass section 4 is provided inside the inclined surface. The air bypass portion 4 is a lower portion 4a of the inclined surface 5.
Air is taken in from and discharged from above. The discharge direction of the upper portion 4b of the air bypass portion 4 is an arc shape facing the streamline side of the inclined surface 5 so that the air flowing obliquely upward along the inclined surface 5 is further bounced. The cross section of the air bypass portion 4 is gradually reduced from the air inflow portion 4a to the air outflow portion 4b. As a result, a flow velocity B faster than the traveling wind A can be obtained. By these, the running wind is bounced up and the peeling area is expanded.

The inclined surface 5 is rotatable in the front-rear direction about the pin 6 at the lower end thereof. Reference numeral 7 is a piston cylinder device for rotating the inclined surface 5. Of the front and rear air bypass passages 4, 4, the bypass passage 4 on the traveling direction (front) side opens the air outflow portion 4b, and the air outflow portion 4b of the rear air bypass passage 4 is closed. The opening degree of the air outflow portion 4b of the front air bypass passage 4 is determined by the vehicle speed. This opening degree changes the angle of the air blowout, and the flow velocity that hits the pantograph 1 due to the separation phenomenon can be effectively reduced.

In the following description, the inclined surface 5 is called a current plate. The front and rear surfaces of the panter cover 3 in front of which the piston cylinder device 7 is arranged are arc-shaped inclined surfaces,
This inclined surface is referred to as an inclined surface 30.

It is controlled by the piston cylinder device 7, 7 control means 8. The control means 8 drives the piston cylinder devices 7, 7 according to the noise generated by the pantograph 1, the traveling speed and the traveling direction of the vehicle, and controls the optimum angles of the straightening vanes 5, 5. A detector is provided in the pantograph 1 for the noise.

In FIG. 3, the rectifying plate 5 is fixed and the inclined surface 3 is formed.
0, in the portion corresponding to the lower surface of the air bypass portion 4,
The current plate 5a is provided. The straightening vane 5 on the front side of the pantograph 1 in the vehicle traveling direction is in an open state, and the straightening vane 5 on the rear side of the pantograph 1 in the vehicle traveling direction is in a closed state.

The other structure is similar to that of the embodiment shown in FIG.

FIG. 4 is a combination of the embodiment shown in FIG. 2 and the embodiment shown in FIG. 3, in which straightening vanes 5 and 5a are provided on both sides of the air bypass portion 4. The air bypass portion 4, which is on the front side of the pantograph 1 in the vehicle traveling direction, is in an open state, and the air bypass portion 4, which is on the rear side of the pantograph 1 in the vehicle traveling direction, is in a closed state. The straightening vanes 5 and 5a can change the air splash effect of the air bypass portion 4. The straightening vanes 5 and 5 a are controlled by the control means 8.

The other structure is the same as that of the above embodiment.

[0018]

As described above, according to this patent, the noise generated from the current collector can be effectively reduced.

[Brief description of drawings]

FIG. 1 shows a perspective view of an embodiment of a soundproofing device according to the present invention.

FIG. 2 is a vertical cross-sectional view of one embodiment of the soundproofing device according to the present invention in the longitudinal direction of the vehicle center.

FIG. 3 is a vertical cross-sectional view of another embodiment of the soundproofing device according to the present invention in a longitudinal direction of a vehicle center.

FIG. 4 is a longitudinal sectional view of another soundproofing device according to the present invention in a longitudinal direction of a vehicle center.

[Explanation of symbols]

1 ... Pantograph, 2 ... Car body, 3 ... Panto cover, 4 ...
By-pass part, 4a ... Air inflow part, 4b ... Air outflow part,
5, 5a ... Current plate, 7 ... Piston cylinder device, 8 ... Control means.

Claims (2)

[Claims] 1. A soundproofing device, which is installed before and after a current collector of a vehicle traveling direction, and has an inclined surface whose upper end side is retracted from a lower portion in the vehicle traveling direction. A soundproof device for a current collector of a vehicle, characterized in that an air bypass passage extending from a lower part to an upper part of the inclined surface is provided on the electric power device side. 2. The soundproof device for a vehicle current collector according to claim 1, wherein at least one of the front and rear wall surfaces forming the air bypass passage in the vehicle traveling direction is rotatable upward with a lower portion as a center. A soundproof device for a vehicle current collector, which is provided.