JP2000280900A - Control device for air srping of rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the danger of derailment and prevent the wasteful consumption of air by selectively operating each lock mechanism according to a plurality of modes determined by the combination of the detection instruction corresponding to each regulating valve changed according to the traveling state of a rolling stock. SOLUTION: A lock mechanism for blocking orifices 14a, 14b to stop the operation of a height regulating valve 4 is constituted by an air passage 36, air pistons 34a, 34b, and blocking rod parts 38a, 38b. The torsional state of a truck is detected from the operating state of a limit switch as the detection device added to the height regulating valve 4, and when the torsion is detected, the lock mechanism consisting of a solenoid valve 37, the air passage 36, the air pistons 34a, 34b and the like is selectively operated to stop the operation of the corresponding height regulating valve 4. According to this structure, a preferable device never increasing the load of a compressor for supplying compressed air even at the time of passing a gentle curve or having no danger of derailment can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a vehicle air spring disposed between a vehicle body and a bogie of a railway vehicle and supporting the vehicle body.

[0002]

2. Description of the Related Art Recent high-speed vehicles employ a structure in which an air spring is interposed between a bogie and a vehicle body to support the vehicle body, and the vehicle height is kept constant even if the weight of the vehicle body increases or decreases. The height adjustment valve is used.

An outline of such a conventional control device for a vehicle air spring will be described with reference to FIGS. 6 and 7, focusing on a height adjusting valve as a main structure.

In FIG. 6, a vehicle body 1 is associated with an arrangement of wheels, and is supported by an air spring 3 interposed between a bogie 2 at at least four front, rear, left, and right sides of the vehicle body 1. Height adjustment valve 4 corresponding to air spring 3
Is installed.

The adjusting valve 4 has an operating shaft 5 which will be described in detail later. The operating shaft 5 is provided with one end of a lever 6 for rotating the operating shaft. The other end of the lever 6 and the carriage 1 are connected by a connecting rod 7.

Accordingly, when the air spring 3 changes due to a load change or the like and the interval between the vehicle body 1 and the bogie 2 changes (the vehicle height changes), the lever 6 is connected to the lever 6 via the lever 6 and the connecting rod 7. The operating shaft 5 connected to the distal end rotates.

The structure and operation of the height adjusting valve 4 which operates in response to the movement of the operating shaft 5 will be described with reference to FIG. The height adjustment valve 4 has the following configuration and mechanism inside the valve body 10 as a base.

That is, the interior of the valve body 10 has a large room 11 having a large space in the center and two small rooms 12a and 12b having a small space in the center.
The large chamber 11 and the small chambers 12a and 12b are partitioned by a piston 13 slidably provided therebetween.

The large chamber 11 and the small chambers 12a and 12b are filled with oil.
Return valves 20a and 20b are incorporated corresponding to 2b, and are pressed into the small chambers 12a and 12b by springs 21a and 21b. Each return valve 21a, 21
b is provided with orifices 14a and 14b, respectively, so as to squeeze the filled oil.

The operating shaft 5 is rotatably supported across the large chamber 11. One end of the operating shaft 5 is fixed to the operating shaft 5, and the other end is connected to the piston 13. A buffer spring 15 is mounted in engagement.

An operating arm 16 having one end engaged with a piston 13 is rotatably mounted on the operating shaft 5, and the other end of the operating arm 16 is rotated to open air valves 17, 18. It is designed to be pressed.

When the air valve 17 is pushed and the valve is opened, a path for supplying air from the air reservoir (not shown) to the air spring 3 is completed. On the other hand, when the air valve 18 is pushed and the valve is opened, the air spring is opened. 3 communicates with the exhaust path to release the air in the air spring 3 to the outside. A check valve 19 prevents backflow from the air spring 3 to the air reservoir when the air valve 18 is open.

In the conventional vehicle having the above-described structure, when the load increases and the space between the vehicle body 1 and the bogie 2 is reduced, the lever 6 tilts as a lever 6a indicated by a chain line, and the operating shaft 5 is bent. The piston 1 is rotated clockwise, and
Apply force to 3.

Although the piston 13 tends to move in the direction of the solid line arrow 25 in the figure, the oil in the small chamber 12b flows out through the orifice 14b, so that the piston 13 moves gradually due to the resistance. That is, the rotation of the operating shaft 5 is temporarily absorbed as elastic deformation of the buffer spring 15. The reason why the buffer spring 15 and the orifice 14 are provided is to make the height adjustment valve 4 insensitive to a high frequency fluctuation. Also,
On the opposite side of the small chamber 12b from which the oil is extruded, that is, on the side of the small chamber 12a into which the oil flows, the return valve 20a is opened to prevent the oil from flowing.

As described above, when the piston 13 moves in the direction of the solid arrow 25, the operating arm 16 above the operating shaft 5 rotates in the direction of the solid arrow 26, and pushes the air valve 17. Then, a passage for supplying air to the air spring 3 is opened, the air is supplied to the air spring 3, and the vehicle body 1 is lifted, and the interval between the vehicle body 1 and the bogie 2 is restored.

When the vehicle body 1 is lifted, the lever 6 returns to the horizontal position, and the operating shaft 5 and therefore the piston 13 return to the neutral position, so that the air valve 17 is closed and the supply of air to the air spring 3 is stopped. . In this way, even if the load increases, the distance between the vehicle body 1 and the bogie 2 is kept constant.

Conversely, when the load is reduced, the lever 6 becomes like a lever 6b shown by a dashed line, the operating shaft 5 rotates clockwise, and the piston 13 becomes a broken arrow 2
Try to move in the direction of 7. The operating arm 16 rotates in the direction of the dashed arrow 28 to push the air valve 18 to open the valve, thereby forming a circuit for bleeding air from the air spring 3.

As described above, in the conventional apparatus, the height control valve 4
According to the function, the vehicle height is automatically adjusted by sending air from the air reservoir to the air spring 3 or exhausting the air in the air spring 3 to the outside in accordance with the fluctuation of the load.

[0019]

However, a railway vehicle is subject to the action of centrifugal force when passing through a curved part.
In the curved part of the track, the outer rail is laid higher than the inner rail to prevent derailment, and a so-called cant with a difference in height between the inner and outer rails is attached. In addition, a relaxation curve is used for a connection portion between the straight line portion and the curved portion, and at such a position, the cant gradually changes.

Therefore, due to such a shape of the track, a vehicle passing therethrough is twisted with respect to the vehicle body by the front and rear bogies, and the gap between the vehicle body and the bogie is different as compared to the left and right sides of the vehicle body.

Then, the height adjusting valve is actuated to release air from the floating air spring, so that the so-called wheel load, which is the load shared by the wheels in the vertical direction on the track, comes off and derails. In addition to the danger of the above, there is a problem that air is wasted.

On the other hand, air is supplied from the air reservoir to the contracted air spring by the operation of the height adjustment valve, and excess air is consumed. This increases the load on the compressor that supplies the compressed air.

The present invention eliminates such problems caused by the conventional height adjusting valve, and prevents the risk of derailment by preventing the wheel load from coming off due to the torsion of the track even when passing through the relaxation curve portion. It is an object of the present invention to provide a control device for a vehicle air spring that avoids unnecessary consumption of air.

[0024]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an air spring is disposed between a vehicle and a bogie separately in front, rear, left and right of the vehicle. In the control device for a vehicle air spring, which controls the vehicle height by adjusting the air pressure supplied to each air spring with a height adjustment valve provided on the vehicle side, Incorporating a lock mechanism to stop and a detection device that detects a constant change in vehicle height and issues a detection command,
Provided is a control device for a vehicle air spring provided with a control device for selectively operating each of the lock mechanisms according to a plurality of modes determined by a combination of detection commands corresponding to each adjustment valve that changes depending on the running condition of the vehicle. Is what you do.

That is, according to the present invention, each height adjusting valve provided corresponding to each air spring has a lock mechanism for stopping its operation and a detection command by detecting a constant change in the vehicle height. In accordance with a plurality of modes determined by a combination of detection commands by the detection device, the control device selectively activates each of the lock mechanisms and controls the corresponding height adjustment valves that do not require operation. By doing so, the unnecessary operation of the height adjustment valve is eliminated, and a preferable device that does not waste air and that does not increase the load on the compressor that supplies the compressed air and that does not risk derailment is obtained. It is like that.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In order to avoid redundant description, the same parts as those of the above-described conventional one are denoted by the same reference numerals in the drawings, and redundant description will be omitted as much as possible.

There is an air spring 3 between the vehicle body 1 and the bogie 2,
The change in the gap between the bogie 1 and the vehicle body 2 is transmitted to the height adjusting valve 4 via the connecting rod 7 and the lever 6, and the basic structure for operating the operating shaft 5 is the same as the conventional one. In the embodiment, the limit switch A31 and the limit switch B32 (hereinafter LS-A31, LS-B
32, which is operated by an operating piece 33 attached to the tip of the lever 6 to output a signal corresponding to a change in the gap between the carriage 1 and the vehicle body 2.

That is, the connecting rod 7, the lever 6 connected thereto, the operating piece 33 at the tip thereof, and the operating piece 33 are turned on.
LS-A31, L that generates a predetermined signal when turned off
The SB 32 and the like constitute a detection device that detects a constant change in the vehicle height and generates a detection command.

Next, the height adjusting valve 4 has a structure in which a buffer spring 15 and an operating arm 16 are provided on the operating shaft 5 as its internal structure, and the inclination of the lever 6 is transmitted to the piston 13. Are provided with return valves 20a and 20b, are pressed by springs 21a and 21b, and the oil flows out through the orifices 14a and 14b. Further, the operating arm 16 rotates to push the air valves 17 and 18,
The structure for supplying air to the air spring 3 and extracting air from the air spring 3 is the same as the above-described conventional one.

However, in this embodiment, the small chambers 12a, 1a
Air pistons 34a and 34b are slidably fitted in 2b, and are pressed against the wall surfaces by return springs 35a and 35b.

The valve body 10 is provided with an air passage 36, the upstream of which communicates with a solenoid valve 37. When the solenoid valve 37 is opened, the air reservoir 36 is not shown through the solenoid valve 37. The air pistons 34a and 34b are pressed against the back by compressed air supplied from the air.

The air pistons 34a, 34b are provided with closing rod portions 38a, 38b, and when the air pistons 34a, 34b are pushed and moved, the closing rod portions 38a, 38b close the orifices 14a, 14b. ing.

That is, the air passage 36, the air pistons 34a and 34b, the closing rods 38a and 38b, and the like close the orifices 14a and 14b to constitute a lock mechanism for stopping the operation of the height adjustment valve 4.

In the present embodiment configured as described above, the air supplied through the air passage 36 causes the height adjustment valve 4 to be completely intact when no back pressure is applied to the air pistons 34a and 34b. Do the same thing.

However, a back pressure is applied here, and the air pistons 34a and 34b move inward, and the closing rod portion 38
When the orifices 14a, 14b are closed with the holes a, 38b, the oil outlets of the small chambers 12a, 12b are closed, so that the piston 13 can no longer move and the lever 6 cannot tilt.

This means that the air valves 17 and 18 cannot be operated either, which means that the lock mechanism of the height adjustment valve 4 functions and the operation of the height adjustment valve 4 is stopped. It is.

The manner in which the lock mechanism operates will be described with reference to FIGS. In FIG. 3, No. 1 to No. 1
No. 4 four air springs 3 are installed.

Each of the air springs 3 has a height adjusting valve 4
When various loads are applied during running of the vehicle, the LS-A31 provided to each height adjustment valve 4 is thereby provided.
LS-B32 may or may not operate.

This situation is organized into five modes of CASEI to CASEV, each mode is classified and determined by the control device 50, and the solenoid valve 37 corresponding to each height adjustment valve 4 is selected to generate an operation command. I tried to make it.

FIG. 4 summarizes the operation states of the limit switches 4 and the operation states of the respective height adjusting valves 4 as electromagnetic valve instructions of the control device. FIG. 5 is an explanatory diagram of the operation states of the limit switches. Are arranged and displayed in an image showing the state of the front, rear, left and right four places of the vehicle.

The torsion between the vehicle body 1 and the bogie 2 is determined from the operating state of the limit switch corresponding to each height adjustment valve 4 and applied to the modes set as CASEI to CASEV as described below. An example is shown in which the operation of the height adjustment valve 4 is controlled by turning on or off (hereinafter abbreviated as ON / OFF).

CASEI: The case where the vehicle body 1 is not twisted but is entirely inclined in the lateral direction. In this case, the solenoid valve 3
By turning off all the switches 7, the height adjustment valves 4 are operated as usual, and the posture of the vehicle body is recovered.

CASE II: A case where the vehicle body 1 is not twisted but leans forward and backward (for example, a passenger leans on one side). Also in this case, by turning off all the solenoid valves 37, each height adjustment valve 4 is operated as usual,
Restore the body posture.

CASE III: LS of 3 out of 4 places
-This is the case where A31 is working but only one place is not working. In this case, the solenoid valve 37 corresponding to the bogie side (No. 1 and No. 2) floating in parallel is turned off and the height adjusting valve 4 is operated to recover the vehicle height, but it is inclined. The solenoid valves 37 corresponding to the sides (No. 3 and No. 4) are turned on so that the height adjustment valve 4 is not operated.

CASE IV: Similar to CASE III, but the case where the left and right inclination of the vehicle body 1 is large and a slight twist is detected. At this time, the solenoid valve 37 corresponding to the left side (No. 1 and No. 3) in the drawing is turned off, and the height is adjusted by the height adjustment valve 4. On the other hand, the solenoid valve 37 corresponding to the right side (No. 2 and No. 4) where the inclination is detected is turned on so that the height adjustment valve 4 is not operated.

CASEV: The front and rear bogies 2 are tilted in the opposite direction (when passing on a transition curve), and a torsion is detected. In this case, all the solenoid valves 37 are turned ON, and the operation of the height adjustment valve 4 is stopped. This makes it possible to stop the release of air when passing through the relaxation curve.

As described above, according to the present embodiment, the torsion state of the bogie 2 is detected from the operation state of the limit switch as a detection device added to the height adjustment valve 4, and when the torsion is detected, the electromagnetic valve 37 is detected. , The lock mechanisms such as the air passage 36 and the air pistons 34a and 34b are selectively actuated to inhibit the operation of the corresponding height adjustment valve 4, so that even when the air passes through the relaxation curve, the air can be conveyed as in the related art. It is possible to obtain a preferable device that eliminates wasteful use, does not increase the load on the compressor that supplies compressed air, and does not cause a risk of derailment.

As a similar technique, see, for example,
There is also a device as shown in 135871, which is provided with a height detecting device for each air spring.
The supply and discharge of air from the air spring is performed directly by the commander of the controller without using the height adjustment valve.
Since the controller has to perform control for all operating conditions, it becomes a very complicated control system.

On the other hand, in the present embodiment, the mode in which there is no problem in the conventional control is left to the mechanical conventional height adjustment valve, and when there is a problem such as when passing through a relaxation curve, a constant corresponding to the mode is used. Are set, and these are selectively controlled, so that a very simple control system may be used.

Although the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to such an embodiment.
It goes without saying that various changes may be made to the specific structure within the scope of the present invention.

[0051]

As described above, according to the present invention, air springs are arranged between the vehicle and the bogie separately in front, rear, left and right of the vehicle, and the height adjustment valves provided on the vehicle side corresponding to the respective air springs. In the control device for a vehicle air spring, which controls the vehicle height by adjusting the air pressure supplied to each air spring, the height adjustment valve has a lock mechanism for stopping its operation and a constant vehicle height. A detection device that detects a change and issues a detection command is incorporated, and each of the lock mechanisms is selectively operated in accordance with a plurality of modes determined by a combination of detection commands corresponding to each adjustment valve that changes depending on the traveling state of the vehicle. Since a control device is provided and configured, a lock mechanism for stopping its operation,
In each height adjustment valve incorporating a detection device that detects a constant change in vehicle height and issues a detection command, the lock mechanism is selectively operated according to a plurality of modes determined by a combination of the detection commands. By stopping the unnecessary height adjustment valves, the unnecessary ones of the height adjustment valves are not operated, which wastes air and reduces the load on the compressor that supplies compressed air. It is possible to obtain a suitable control device for an air spring for a vehicle which does not increase and has no danger of derailment.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a control device for a vehicle air spring according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an internal configuration of a height adjustment valve in FIG.

FIG. 3 is a diagram conceptually illustrating a control mode according to the present embodiment, in which (a) is a schematic configuration of a vehicle, and (b) is an explanatory diagram illustrating an arrangement of air springs and the like on a vehicle body.

FIG. 4 is an explanatory diagram in which a relationship between an operation state of a limit switch that operates according to the control mode of FIG. 3 and an instruction state of a solenoid valve is arranged.

FIG. 5 is an explanatory diagram illustrating an operation state of a limit switch of FIG. 4;

FIG. 6 is an explanatory diagram showing the overall configuration of a conventional vehicle air spring control device.

FIG. 7 is an explanatory view showing the internal configuration of the height adjustment valve in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 bogie 3 Air spring 4 Height adjustment valve 5 Shaft ... Operating shaft 6 Lever 6a, 6b Lever 7 Connecting rod 10 Valve body 11 Large chamber 12a 12b Small chamber 13a 13b Piston 14a 14b Orifice 15 Buffer spring 16 Working arm 17 air valve 18 air valve 19 check valve 20a 20b return valve 21a 21b spring 31 limit switch A 32 limit switch B 33 operating piece 34a 34b air piston 35a 35b return spring 36 air passage 37 solenoid valve 38a 38b closing rod 50

Claims (1)

[Claims] 1. An air spring is disposed between a vehicle and a bogie separately in front, rear, left and right of a vehicle, and supplied to each air spring by a height adjustment valve provided on the vehicle side corresponding to each air spring. In the control device for a vehicle air spring for controlling the vehicle height by adjusting the air pressure, each of the height adjustment valves is provided with a lock mechanism for stopping its operation and a detection command by detecting a constant change in the vehicle height. And a control device for selectively operating each of the lock mechanisms according to a plurality of modes determined by a combination of detection commands corresponding to each adjustment valve that changes depending on the traveling state of the vehicle. Control device for a vehicle air spring.