JPS5852801Y2 - Vehicle current collector - Google Patents

Description

[Detailed description of the invention] The present invention relates to a current collector for a vehicle that is installed on the roof of an electric railway vehicle and collects current from an overhead contact line. The present invention relates to an improvement in a current collector for a vehicle that is raised by a spring force by unlocking a restraint means with pressurized air and lowered by pressurized air.

In general, in this type of current collector for vehicles, measures are taken to reduce the rising force in order to avoid the collector boat from violently colliding with the overhead contact lines when the current collector rises. .

FIG. 1 is a skeletal diagram showing the general structure of a conventional current collector for a vehicle of this type.

In the figure, buttons 1 and 2 have one end rotatably connected to brackets 5 and 6 attached to a base (not shown) by main shafts 3 and 4, respectively, and buttons 7 and 8 have one end of a shaft. The upper frame 11 is rotatably connected to the other ends of the lower frames 1 and 2 by buttons 9 and 10, and the upper frame 11 is attached to a shaft 12 that rotatably connects the other ends of the upper frames 7 and 8 to each other. 13 is a lifting tension spring stretched between the tips of lifting levers 14 and 15 whose rear ends are fixed to the main shafts 3 and 4, respectively; 16 is a lifting tension spring stretched between the tips of lifting levers 14 and 15 whose rear ends are fixed to the main shafts 3 and 4, respectively; 16 is a fixing member such as a base with a pin 17; The bent portion at the tip is rotatably supported by a bracket 18 attached to the upper frame 7 and 8.
A restraining lock which keeps the current collector in a folded state as shown in the figure by engaging with a shaft 12 connecting the other end thereof, 19 is a fixing member such as a bent end portion of this restraining lock 16 and a base. A tension spring 20, which is stretched between
a restraining key unlocking air cylinder facing the extracting portion of the 2
1, the tip of the piston rod 21a faces the tip of the lowering lever 22 whose rear end is fixed to the main shaft 3, and an exhaust throttle valve (not shown) is provided on the side of the piston rod 21a.
23 is a solenoid valve for unlocking the restraint key, 24 is an air pipe connected between the solenoid valve 23 for unlocking the restraint key and the air cylinder 20 for unlocking the restraint key, 25 is a descending air cylinder provided with A descending solenoid valve 26 is an air pipe connected between the descending solenoid valve 25 and the descending air cylinder 21.
7 is a check valve inserted and connected to this air pipe 26, 28 is a variable throttle valve that is also connected to the air pipe 26 in parallel with this check valve 27, and 29 is a lower solenoid valve 25 and a check valve 27. a fixed throttle valve, which is also inserted and connected to the air pipe 26 between;
30 is an air reservoir, 31 is an air reservoir 30 and a lowering solenoid valve 2
5, 32 is this air pipe 31
The air pipe 33 is also connected to the restraint key unlocking solenoid valve 23 branching off from the same, and 33 is an overhead contact line through which current is collected by the current collector.

A conventional current collector for a vehicle of this type is configured as described above, and when the current collector is raised from the folded state as shown in the figure, the restraint key unlocking solenoid valve 23 is energized.

As a result, the pressurized air in the air reservoir 30 is transferred to the air piping 31, the air piping 32, the solenoid valve 23, and the air piping 24.
As the piston moves to the left, the rear end portion of the restraining key 16 is pushed by the piston rod 20a of the air cylinder 20, and the locking key is released. 16 rotates clockwise about the pin 17 against the spring force of the tension spring 19, so that the distal end of the locking lock 16 is disengaged from the shaft 12.

When the distal end of the restraint lock 16 is disengaged from the shaft 12 in this way, the current collector, which was kept in the folded state by the restraint lock 16 in its casing, is fixed to the main shafts 3 and 4, respectively. The current collecting boat 11 is raised by the spring force of the lifting tension spring 13 stretched between the tips of the lifting levers 14 and 15, and comes into contact with the overhead contact line 33.

In this manner, when the current collector has been raised completely, the excitation of the restraining key unlocking solenoid valve 23 is released, and the supply of pressurized air to the restraining key unlocking air cylinder 20 is cut off.

As a result, the locking key 16, which had been uncoupled from the shaft 12 and rotated clockwise, returns to its original position due to the spring force of the tension spring 19, and the piston rod 2 of the air cylinder 20
0a to the right, which air cylinder 2
The pressurized air inside the 0 is exhausted through the solenoid valve 23.

To lower the current collector from such a state, the lowering solenoid valve 25 is energized.

As a result, the pressurized air in the air reservoir 30 passes through the air pipe 2.6 to which the air pipe 31, the solenoid valve 25, the identification throttle valve 29, and the check valve 27 are inserted and connected to the descending air cylinder 21. When the piston moves to the left, the tip of the lowering lever 22 is pushed by the piston rod 21a of the air cylinder 21, and the main shaft 3, to which one end of the lower frame 1 is connected, moves toward the lowering lever 22. As the current collector rotates counterclockwise via the lever 22, the current collector starts to descend.

During the lowering of the current collector, the shaft 12 connecting the other ends of the upper frames 7 and 8 collides with the tip of the restraint hook 16 bent diagonally downward, thereby causing the restraint. The lock 16 momentarily rotates clockwise against the spring force of the tension spring 19, and at the same time the shaft 12 passes through the first winding portion of the locking lock 16, it is returned to its original position by the spring force of the tension spring 19. , and its tip engages the shaft 12, so that the current collector is again kept in the folded state.

This lowering of the current collector is performed slowly due to the synergistic action of the exhaust throttle valve provided on the descending air cylinder 21 and the fixed throttle valve 29 inserted and connected to the air pipe 26.

When the lowering of the current collector is completed in this way, the lowering solenoid valve 25 is de-energized, and the lowering air cylinder 21 is de-energized.
When the supply of pressurized air to the air cylinder 21 is cut off, the pressurized air that was being sent to the air cylinder 21 is removed from the check valve 2 in the air pipe 26.
Air is gradually exhausted from the electromagnetic valve 25 through a variable throttle valve 26 button and a fixed throttle valve 29 connected in parallel with the air cylinder 21, and the piston of the air cylinder 21 is provided with an exhaust throttle valve on its piston rod 21a side. Coincidentally, the air pressure on both sides is equal to atmospheric pressure.

Therefore, as described above, when the current collector is raised, the main shaft 3 rotates clockwise, and the piston rod 21a of the air cylinder 21 is pushed by the tip of the lowering lever 22, causing the piston to move upward. will move to the right, so the air remaining on the right side of this piston will move to the right side of the solenoid valve 2.
However, since the variable throttle valve 28 and the fixed supply valve 29 are connected in the middle of the air pipe 26, the air inside the air cylinder 21 is not exhausted suddenly.
As the piston moves to the right, this air cylinder 2
This will gradually build up pressure inside the piston and create resistance against the piston.

As a result, the rotational speed of the main shaft 3 is slowed down, so that the upward force of the current collector is alleviated.

The degree of relaxation of this upward force can be arbitrarily set by adjusting the variable shark valve 2B.

In this type of conventional vehicle current collector, the piston rod 2
In order to gently lower the current collector to the air pipe 26 connected between the air cylinder 21 and the solenoid valve 25, using the descending air cylinder 21 provided with an exhaust throttle valve on the side 1a. In addition to the original fixed throttle valve 29 of , a check valve 27 is inserted and connected, and a variable throttle valve 28 is connected in parallel with the check valve 27 of . Although an attempt is made to alleviate the rising force of the current collector, the pressure of the air inside the descending air cylinder 21 does not reach enough pressure to alleviate the rising force of the current collector. , it took a considerable amount of time, and therefore, the current collector boat 11 and the overhead contact line 33 were
There is no problem if the distance is quite far, but in general,
In an electric railway vehicle, the distance between the current collector boat 11 and the overhead contact line 33 when the current collector is in the folded state is not very far, so when the current collector completes raising,
The air inside the descending air cylinder 21 does not reach a pressure sufficient to alleviate the upward force of the current collector, and even though the above-mentioned measures to alleviate the upward force have been taken, The power collector boat 11 collides with the overhead contact line 33 rather violently, and the power collector boat 11 and the overhead contact line 3
3 may be scratched, or in some cases, these collector boats 11
Problems such as damage to overhead contact lines 33 were unavoidable.

The present invention was developed in consideration of these points.
The conventional current collector for a vehicle shown in Fig. 1 is provided with an idle piston having a large diameter portion and a small diameter portion between the air piping to the locking key unlocking air cylinder and the air piping to the lowering air cylinder. To provide a novel current collector for a vehicle, which can optimally alleviate the upward force of the current collector by connecting a pneumatic circuit consisting of an air cylinder, a plurality of throttle valves, and accompanying check valves. It is something.

Hereinafter, the details of the present invention will be explained based on FIG. 2.

FIG. 2 corresponds to FIG. 1 and also shows an embodiment of the present invention in a skeletal diagram.

As shown in the figure, the present invention differs from the conventional vehicle current collector shown in FIG.
4a and a return compression spring 34b.
, an air pipe 24 connected between the restraint key unlocking solenoid valve 23 and the restraint key unlocking air cylinder 20, and an air pipe 26 connected between the lowering solenoid valve 25 and the lowering air cylinder 21. In between, the large diameter side of the floating piston 34a is arranged so as to be on the air pipe 24 side, and the air pipe 24 and the large diameter side of the air cylinder 34 are connected by an air pipe 35,
A fixed furnace valve 36 is inserted and connected to this air pipe 35, and the air pipe 26 and the small diameter side of the air cylinder 34 are connected by an air pipe 37.

Further, the air piping 24 and the small diameter side of the full-feed cylinder 34Q are connected by an air piping 38, and a check valve 39 and a fixed throttle valve 40 having a diameter ratio of the throttle hole are inserted and connected to the air piping 38. do.

The present invention is constructed as described above, and when the current collector is raised from the folded state as shown in the figure, the restraining key unlocking solenoid valve 23 is energized.

As a result, the pressurized air in the air reservoir 30 is transferred to the air piping 31, the air piping 32, and the solenoid valve 23! Air piping 24
The air is then fed into the restraint key unlocking cylinder 20, and the engagement of the tip of the restraint key 16 with the shaft 1.2 is released, which is similar to the conventional vehicle current collector shown in FIG. , a variable throttle connected in the middle of an air pipe 26 connected between a descending air cylinder 21 with an exhaust throttle valve provided on the side of the piston rod 21a and a descending electromagnetic valve 25. The rising force is alleviated by the action of the valve 28, but according to the present invention, at the same time as the solenoid valve 23 for unlocking the restraint key is energized, the air 1 is sent through the air pipe 24 to the cylinder 20 for unlocking the restraint key. A part of the pressurized air is passed through a check valve 39 and a fixed throttle valve 4 inserted and connected to the air pipe 38.
0, the small diameter side of the air cylinder 34, the air pipe 37, and the air pipe 26 as well, and are fed into the descending air cylinder 21, and the pressure of the air inside this air cylinder 21 increases rapidly. At the initial stage of the electric device's upward movement, an action will be taken to reduce the force of its upward movement.

At that time, a part of the pressurized air sent to the all-round air cylinder 20 for unlocking the restraint key through the air piping 24 passes through the fixed throttle valve 36 inserted and connected to the air piping 35, and then passes through the air cylinder 34. The pressure of the air fed into the large diameter side of the air cylinder 34 acts on the large diameter portion of the floating piston 34a. Since the diameter of the throttle hole is smaller than that of the fixed throttle valve 40, the check valve 39 button and the fixed throttle valve 40
is lower than the pressure of the air flowing into the small diameter side of the air cylinder 34, and at the beginning of the rise of the current collector, the sum of the air pressures acting on the small diameter part of the floating piston 34a of the air cylinder 34 is smaller than the pressure of the air flowing into the small diameter side of the air cylinder 34. Since the pressure is greater than the sum of the air pressures acting on the lowering air cylinder 21, the floating piston 34a is prevented from moving to the left, and the supply force of pressurized air to the descending air cylinder 21 is continued.

Then, the pressure of the air fed into the large diameter side of the air cylinder 34 is accumulated, and the sum of the air pressures acting on the large diameter part of the floating piston 34a becomes the sum of the air pressures acting on the small diameter part. When it exceeds the compression spring 3, the floating piston 34a
The air cylinder 3 moves to the left against the spring force of 4b.
4, the supply of pressurized air to the descending air cylinder 21 is cut off.

Therefore, by appropriately selecting the diameter of the throttle hole of the fixed throttle valve 36, the upward force of the current collector can be optimally alleviated.

After the current collector has been raised, the restraint key unlocking solenoid valve 23
When the energization of the air cylinder 34 is removed, the floating piston 34 of the air cylinder 34
a is returned to its original position by the spring force of the compression spring 34b, and the pressurized air on the large diameter side of the air cylinder 34 is exhausted via the solenoid valve 23.

In this state, when the lowering solenoid valve 25 is energized, the operation is exactly the same as that of the conventional vehicle current collector shown in FIG. 1, and the current collector is lowered.

At this time, a check valve 39 is inserted and connected to the air pipe 38 that connects the small diameter side of the air cylinder 34 and the air pipe 24 to the air cylinder 20 for unlocking the lock key, so the air pipe 26 is connected to the air pipe 38. Then, the air is sent to the descending air cylinder 21 1
Pressurized air is not sent into the air pipe 24 to the lock release air cylinder 20.

In this way, the present invention provides a floating piston having a large diameter portion and a small diameter portion between the air piping to the restraining key unlocking air cylinder and the air piping to the descending air cylinder of the conventional vehicle current collector. By connecting an air cylinder equipped with a pneumatic circuit consisting of a plurality of throttle valves and associated check valves, and appropriately selecting the diameter of the throttle hole of the throttle valve connected to the air cylinder, this air cylinder can be The action of the current collector can optimally alleviate the rising force of the current collector, and even when the current collector is in the folded state and the distance between the current collector boat and the overhead contact line is not very far, the current collector boat is connected to the overhead contact line. This has an extremely large practical effect in that the current collector boat and the overhead contact line will not be damaged or damaged because there will be no violent collision with the current collector boat or the overhead contact line. .

[Brief explanation of the drawing]

Fig. 1 is a skeletal diagram showing the general structure of a conventional vehicle current collector, and Fig. 2 is equivalent to Fig. 1, which also shows an embodiment of the present invention in a skeletal diagram. It is. 1.2...Lower frame, 3,4...Main shaft, 7,8...
Upper frame, 9, 10, 12... shaft, 11... collector boat,
13゜19... Tension spring, 14, 15... Lifting lever, 16... Restraint key, 20... Restraint key unlocking air cylinder, 21... Lowering air cylinder, 22.
...Lever for lowering? 3... Solenoid valve for unlocking the restraint key,
24゜26.31.32, 35, 37, 38... Air piping, 25... Solenoid valve for lowering, 27, 39... Check valve, 28... Variable throttle valve, 29, 36, 40...
Fixed throttle valve, 30... Air reservoir, 33... Overhead overhead contact line, 34... Air cylinder, 34a... Idle piston.

Claims (1)

[Scope of utility model registration request] A current collector for a vehicle that is kept in a folded state by a mechanical restraint means, is raised by a spring force by unlocking the mechanical restraint means with pressurized air, and is lowered by the pressurized air, the mechanical restraint means A floating piston having a large diameter part and a small diameter part is installed between a first air pipe that supplies pressurized air to the air cylinder for unlocking the lock and a second air pipe that supplies pressurized air to the descending air cylinder. an air cylinder equipped with the air cylinder, and the large diameter side of this air cylinder is connected to the first
and the small diameter side is connected to both the first and second air pipes, and the inlet of the first air pipe connected to the small diameter side is connected to the floating piston on the large diameter side. A throttle valve is provided between the large diameter side of the air cylinder and the first air pipe, and a throttle valve is provided between the small diameter side of the air cylinder and the first air pipe. A throttle valve and a check valve that allows flow to flow from the first air pipe only in the direction of the small diameter side are inserted and connected in series, respectively, and inserted between the large diameter side of the air cylinder and the first air pipe. 7. Adjust the diameter of the throttle hole of the connected throttle valve to the air cylinder IJ. A current collector for a vehicle, characterized in that the diameter is smaller than the diameter of a throttle hole of a throttle valve inserted and connected between the small diameter side of the holder and the first air pipe.