JPH10145902A - Pantograph lifting device - Google Patents

Abstract

(57) [Summary] In a spring-up pantograph, an electric device that does not use compressed air for raising and lowering operations, and a simpler device that does not require a key for folding and locking the pantograph. It is to be. An electric motor having a device in which a linear motion shaft expands and contracts in the motor axial direction when energized is attached to an underframe via an insulator, and the pantograph is folded by pushing a lowering lever of a pantograph main shaft by expansion and contraction of the linear motion shaft. When the output shaft is extended and held, the pantograph is held in a folded state, the shaft is shortened, the pantograph rises, and the folding and release positions are detected by detecting the expansion and contraction of the shaft with a limit switch and the motor This is a device for stopping the operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pantograph elevating device for a railway vehicle.

[0002]

2. Description of the Related Art FIG. 3 is a structural view showing an example of a conventional lifting and lowering device of a spring-up type pantograph, wherein 1 is a main frame of the pantograph (hereinafter referred to as a pantograph), 1a is a current collecting boat, 1b. Is the main axis of the pantograph 1, 1
c is a main spring, 1d is a lever for lowering the pantograph fixed to the main shaft 1b, 1e is a ceiling pipe, 2 is a key for folding and locking the pantograph (hereinafter simply referred to as a key), and 3 is a lock for the key 2 A key release cylinder, 3a is a return spring of the key 2, 4 is an air pipe, 5 is an ascending solenoid valve, 6 is a pantograph lowering air cylinder, 6a is a piston, 6b is a piston rod tip, 7 is an air pipe, 8 is Lowering solenoid valve, 8a is an exhaust hole of the solenoid valve, 9 is a compressed air source, 10 is an ascending switch, 11 is a descending switch, 12 is a power source, and 13 is an overhead wire. Indicates a state in which it is in contact with.

In FIG. 3, when the pantograph 1 is lowered, the lowering switch 11 is operated to excite the solenoid valve 8. When the solenoid valve 8 is excited, the compressed air is supplied from the compressed air source 9 through the solenoid valve 8 and the air pipe 7 to the air cylinder 6. And the piston 6a and the piston rod tip 6b move to the left in the figure. The pantograph lowering lever 1d is pushed by the piston rod tip 6b, the main shaft 1b rotates in the direction of the arrow X, and the pantograph 1 lowers against the tensile force of the main spring 1c. When the end of the descending step of the pantograph 1 is reached, the ceiling pipe 1e is locked by the key 2, the descending operation of the pantograph 1 is completed, and the pantograph is folded. When the operation of the down switch 7 is stopped, the solenoid valve 8
The compressed air in the air cylinder 4 is released into the atmosphere from the exhaust hole 8a of the solenoid valve 8, and the piston 6a in the air cylinder 6 is in a non-pressurized state.

Next, in order to raise the pantograph 1 in the folded state, the ascending switch 10 is operated to excite the solenoid valve 5, and compressed air flows from the compressed air source 9 through the solenoid valve 5 and the air pipe 4. The cylinder 2 opens to unlock the cylinder 3 and unlocks the ceiling tube 1e of the pantograph 1. The pantograph 1 unlocked in the folded state performs an ascending operation by the pulling action of the main spring 1c. At this time, the lowering lever 1d pushes the piston rod tip 6b, and the piston 6a The pantograph rises while moving rightward as shown.

[0005]

As described above, in the conventional spring-up type pantograph, the key is released when the pantograph is raised, and the unlocking cylinder is released to release the folding locking key. Compressed air is required to operate the lowering air cylinder for lowering the pantograph against the tension of the main spring. For this purpose, it is necessary to equip the vehicle with an air reservoir, dehumidifier, solenoid valve, air piping, etc. in addition to the compressed air source that produces compressed air, which requires a large number of parts. It was complicated and time-consuming.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to solve these disadvantages. An object of the present invention is to provide a lifting and lowering device capable of realizing simplification and weight reduction, and the device will be described below. The lifting device according to the present invention uses an electric motor without using compressed air. In other words, a means for achieving the object is to attach a straight-moving motor to the underframe of the pantograph via an insulator, and to lower the fixed pantograph from the straight-moving axis of the motor to the main shaft of the pantograph via an insulator. This is a lifting / lowering device that is configured to push a lever and includes a limit switch that detects a position where a linear movement axis is extended and a pantograph is in a protruding state.

The operation will be described below. When descending the pantograph from a state in which the pantograph rises and comes into contact with the overhead wire and is at rest, the linear motion motor is energized, and the linear motion axis of the motor is extended, thereby lowering the lever mounted on the main shaft of the pantograph. To rotate the main shaft, lower the pantograph, and fold the pantograph. In this state, the power is cut off and the pantograph is held in the folded state while the straight-moving operation axis is extended.

When ascending the pantograph, the straight-moving motor is energized and rotated in the direction opposite to the direction of the downward movement. When the straight-moving axis is shortened, the lowering lever pushes the straight-moving axis by the tension of the main spring of the pantograph. The main shaft rotates in the direction in which the pantograph rises, and the pantograph rises. When the current collector of the pantograph comes in contact with the overhead line, the ascent of the pantograph stops at that point, but the shortening of the straight-moving axis continues to be reduced to the length of the straight-moving axis when the pantograph reaches the protruding height, and power is supplied. Cut off and stop. The stop of power supply at the folded position at the time of descending and the stop of power supply at the position corresponding to the pantograph release at the time of ascending are both performed by detecting the extension or contraction position of the straight-moving operation axis by the limit switch. Less than,
An embodiment of the present invention will be described in detail with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a structural view showing a pantograph elevating / lowering device according to an embodiment of the present invention, showing a state in which the pantograph is ascending and in contact with an overhead wire. FIG. 2 is an explanatory diagram showing a state in which the pantograph is folded. The components having the same reference numerals as those in FIG. 3 indicate the same components or components having the same functions. 1 and 2,
14 is an insulator 15 from a pantograph frame (not shown).
14a is a straight-moving motor (hereinafter simply referred to as a motor) supported by a motor, 14a is a straight-moving axis of the motor 14, 14b
Indicates an insulator attached to the shaft end. 16 is a limit switch for detecting the shortened position of the straight-moving axis 14a when the pantograph is in the released state, 17 is a limit switch for detecting the extended position of the straight-moving axis 14a when the pantograph is in the folded state, 18 is a lift switch, 19 indicates a down switch.
Note that, instead of the limit switch 16, a pneumatic device may be engaged with the linear operation shaft 14a.

The operation of the apparatus according to the present invention will be described below. As shown in FIG. 1, the pantograph 1 rises and the overhead line 13
When the down switch 19 is pressed in the state of contacting the lower switch 19, the circuit of the limit switch 17 is turned on, so that the electric motor 14 is started, the straight-moving operation shaft 14a is extended, and the lower lever 1d contacts the lower lever 1d. The lowering lever 1d is rotated leftward against the tension of the main spring 1c, and the pantograph 1 is lowered. When the rectilinear motion shaft 14a simply extends and the pantograph is folded and the rectilinear motion shaft 14a presses the contact of the limit switch 17, as shown in FIG. 2, the circuit is cut off and the motor 14 stops, and the motor 14 stops. With the equipped brake, the linear motion axis
14a retains its position when extended. Therefore, the pantograph is kept in the folded state.

Next, when raising the pantograph in the folded state, when the ascending switch 18 is pressed from the state of FIG. 2, the circuit of the limit switch 16 is turned on. In the direction, the rectilinear motion shaft 14a is shortened, and the lowering lever 1d presses the rectilinear motion shaft 14a by the tension of the main spring 1c of the pantograph.
b rotates right and the pantograph rises.

When the current collecting boat 1a of the pantograph comes into contact with the overhead wire 13, the ascent of the pantograph stops there, but the shortening of the linear operation axis 14a is still continued, and the linear operation axis when the pantograph reaches the protruding height is continued. When the length is reduced to the length of 14a, the contact of the limit switch 16 is pushed to cut off the circuit, and the motor 14 stops. The linear motion shaft 14a is an electric motor 14
Is maintained by the brake provided in the vehicle, so that even if the height of the pantograph fluctuates during traveling on the train, the operation of the pantograph does not hinder at all.

[0013]

As described above, according to the present invention, since the raising / lowering operation is performed electrically without using compressed air, the air source, the air reservoir, the air piping,
Pneumatic equipment such as a solenoid valve is not required at all, and practical effects such as simplification and weight reduction of the device, labor for piping, and reduction of space are extremely large. Further, the present device is characterized in that the ascending and descending operations are performed by using an electric motor, and the pantograph is held in a folded state by holding the straight-moving operation axis extended while maintaining it, which has conventionally been necessary. The locking key device at the time of folding can be eliminated, and a lighter and simpler electric lifting / lowering device can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a method of ascending and descending a pantograph showing an example of the present invention.

FIG. 2 is an explanatory diagram showing a state in which the pantograph of FIG. 1 is folded.

FIG. 3 is an explanatory view of a conventional lifting and lowering device of a spring-up type pantograph.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pantograph main frame 2 Folding locking key 3 Unlocking cylinder 5 Ascending solenoid valve 6 Ascending air cylinder 8 Ascending solenoid valve 10 Ascending switch 11 Ascending switch 14 Straight running motor 14a Straight running shaft 15 Insulator 16 Limit switch 17 Limit switch 18 Up switch 19 Down switch

Claims (2)

[Claims] 1. A pneumatic spring-up type pantograph which rises by tension of a main spring, comprising a straight-moving motor having a straight-moving axis, and wherein the straight-moving axis is engaged with a folding of the pantograph. When power is supplied to the pantograph, the linear motion axis extends and rotates the main axis of the pantograph, and this rotation folds the pantograph and maintains the state where the linear motion axis extends, thereby reducing the pantograph folding. An ascending and descending device for a pattern graph, which is locked. 2. The pantograph lifting and lowering device according to claim 1, wherein the means for engaging the linear motion shaft and the pantograph folding uses a limit switch or a pneumatic device.