JPS6392202A - Detector of pantagraph expansion - Google Patents

Abstract

PURPOSE:To enable the expansion of a pantagraph to be exactly detected, by generating back pressure with the rotational movement of the cam of a main shaft with the combined expansion spring of the pantagraph, and by detecting the back pressure to confirm the expansion of the pantagraph. CONSTITUTION:When a cylinder 10 is worked by a solenoid valve 14 and is disengaged from a hook 9, then main shafts 6a, 6b are rotationally moved by a spring 11 and a pantagraph 1 expands. By pressing a bellows 18 with a cam 20 via a push rod 19 along with the rotational movement of the main shaft 6b, back pressure is generated, and a pressure switch 22 is worked, and the expansion of the pantagraph is confirmed at the engineer's cab. As a result, the expansion of the pantagraph can be confirmed safely and exactly at the engineer's cab.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a device for detecting the rise of a pantograph in an electric vehicle.

[Conventional technology and its problems]

In recent years, as vehicles have become faster, there has been a trend to reduce pantographs in order to reduce noise and maintenance costs. Therefore, the rise of each pantograph must be reliably confirmed.

Conventionally, at the start of operation, the driver releases the hook using air from the air reservoir tank, raises the pantograph with a spring, and confirms the rise by checking the shaking of the overhead wire caused by the pushing up of the pantograph, or by checking the overhead wire voltage display lamp. was.

By the way, when many pantographs are provided in one train formation, such as in a train formation, the power receiving ends of each pantograph are connected to each other by one high-voltage bus bar, so the pantograph raising mechanism itself may fail.

Alternatively, pantographs that do not rise due to external factors such as ice formation may still be operable, but there is a drawback that a large amount of current will flow through a normal pantograph and in the worst case, it may burn out.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned drawbacks and provide a pantograph rise detection device that can reliably detect the rise of each pantograph. An insulating fluid pressure generating device is installed that generates back pressure by the rotation of a cam on a main shaft connected to the pantograph, and the rise of the pantograph is confirmed by detecting the back pressure with a pressure sensor. be.

[Embodiments of the invention]

FIG. 1 shows a pantograph having a pantograph elevation detection device according to an embodiment of the present invention. Since this pantograph itself is well known, the outline is shown, and each member is simply drawn with solid lines etc. for the sake of simplification.

1 is a pantograph located on the roof of a vehicle, and 2 is an insulating tube that insulates and supports the pantograph 1 at its four corners. 3
is a casing in which a drive mechanism to be described later is housed, and is supported in the air by four support members 4 extending from the top of the insulator tube 2. Reference numeral 5 denotes a framework constituting the pantograph 1. The lower end of this framework 5 is joined to two main shafts 5a and 5b that are horizontally supported in parallel within the casing 3, and the rotation of the main shafts 6a and 6b is Due to the motion, the framework 5 deforms and the pantograph 1 rises/descends. 07 is a current collector boat that is located at the top of the framework 5 and slides into contact with the overhead wire 8. Next, the drive mechanism inside the casing 3 will be explained. . Reference numeral 9 denotes a farm 7 whose predetermined portion is rotatably supported within the casing 3, and when the upper hook portion 9a engages with a predetermined portion of the framework 5 of the folded pantograph 1, the pantograph 1 is retained. Reference numeral 10 denotes a hook release cylinder for releasing the foot of the footer arm 9. This cylinder 10 is fixed to the casing 3, and the cylinder shaft contacts the foot below the support point of the farm 9.
0, the hook by the footer arm 9 is released. 1] is a spring, and this spring 11 is connected to the main shaft 6a, respectively.
The main shaft 5a is extended by the cam ν connected to the main shaft 5a.

The pantograph 1 rises by applying a rotational force of 6 bis.A piston of a descending cylinder (not shown) is in contact with the main shaft 6b via a cam, and when this descending cylinder operates, it resists the barbs 11. In order to apply rotational force in the opposite direction to the main shafts 6g and 6b, the pantograph 1, which had been rising, descends and is folded by a predetermined amount, and the frame 5 engages the hook portion 9a of the footer arm 9, and the pantograph 1 The mouth is sucked while descending.

13 is an air reservoir; 14 and 15 are electromagnetic valves for raising and lowering the pantograph provided in the middle of the piping from the air reservoir 13, respectively; It is connected to the release cylinder 10 through the cylinder 10. A descending pipe 17 from the solenoid valve 15 is connected to a descending cylinder via a hollow portion of an insulator tube 2 (not shown).

Reference numeral 18 denotes a back pressure generating bellows, which is brought into contact with a cam joint connected to the main shaft 6b via a pusher s19.

The other end of the bellows 18 is a pipe 21. The pressure switch n is connected to the pressure switch n through the hollow hole 2b of the insulator W2.

Electric wire n is drawn into the driver's cab from chi n.

When the cylinder 10 is actuated by the electromagnetic valve 14 and the lever 9 is released, the main shafts 5a and 6b are rotated by the spring 11, and the pantograph 1 rises, but as the main shaft 6b rotates, the cam is applied to the push rod 19. By pressing the bellows 1B through the back pressure, a back pressure is generated and the pressure switch 21 is operated so that the rise of the pantograph can be confirmed from the driver's cab.

Fig. 2 shows a pantograph having a pantograph rise detection device according to another embodiment of the present invention, and parts indicated by the same symbols as in Fig. 1 are the same parts. U is a fluid cylinder for generating back pressure; A spring 241 is provided therein, and the piston 242 is pushed by the spring 241 and comes into contact with the cam.

When the pantograph 1 is raised, as the main shaft 6b rotates, the cam force pushes the piston 242 against the spring 241 and generates back pressure in the cylinder, operating the pressure switch, and the rise of the pantograph can be confirmed from the driver's cab. It looks like this. Insulating oil or air is used as the working fluid for the cylinder.

〔Effect of the invention〕

According to the present invention, since the rise of each pantograph can be safely and reliably confirmed from the driver's cab, there is an effect of improving the reliability of the pantograph.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a pantograph having a rise detection device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a pantograph having a rise detection device according to another embodiment of the present invention. l: pantograph, 2: insulator tube, 3: casing, 4: support member, 5: framework, 6a, 5b: main shaft, 7: collector boat,
8: Catenary wire, 9: Hook arm, 10: Cylinder for release of tension, 11: Spring, 12: Cam, 13: Air reservoir, 14
, 15: Solenoid valve, 16: Ascent piping, 17: Descending piping, 18: Bellows, 19: Push rod, 20 = Cam, 21: Piping, 22: Pressure switch, 23: Electric wire, Muni fluid system 11
241: Spring, 242: Piston. Figure 1

Claims (1)

[Scope of Claims] 1) In a spring-raised, air-lowered pantograph, a cam connected to a main shaft for raising and lowering the pantograph is provided with a back pressure generating device for an insulating fluid that is pushed in the raised position;
A rise detection device for a pantograph, characterized in that a pressure detection device for detecting back pressure of fluid generated due to rise is provided on a vehicle body side insulated from overhead wire voltage. 2) A rise detection device for a pantograph according to claim 1, wherein the insulating fluid back pressure generating device is composed of a push rod and a bellows. 3) A rise detection device for a pantograph according to claim 1, wherein the insulating fluid back pressure generating device is constituted by an insulating fluid cylinder.