JPH1199941A - Height control device of truck for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To do the height control of an axle spring in the case where there is no sufficient distance in an interval between a truck frame and a body floor as well as in the case where any access from the upside cannot be done because the axle spring is set up in space between an axle and a car body, or supposing that the axle exists just under the axle spring. SOLUTION: A cylinder hole 12 is formed on the top of an axle box 11, and a piston 15 in contact with the underside of a spring seat 14 is fittingly inserted into this cylinder hole 12 liquidtightly and shiftably in the vertical direction, while a duct line 17 and a supply port 18 feeding a working fluid to a fluid pressure chamber 16 to be partitioned off in space between the piston 15 and a bottom part of the cylinder hole 12 are formed in the axle box 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting the height of a bogie for a railway vehicle.

[0002]

2. Description of the Related Art Generally, in railway vehicles, in order to eliminate wheel load imbalance and secure a reference range of shaft spring deflection allowance,
Efficiency is improved if the height of the shaft spring is adjusted while the body is mounted on the bogie. For this reason, as shown in FIG. 3, for example, in order to adjust the distance between the axle box 1 and the spring seat 3 of the axle spring 2 installed on the axle box 1, the bogie frame 4 on the axle spring 2 is adjusted. The long bolt 5 is inserted from the hole in and screwed into the spring seat 3,
There is a device in which the shaft spring 2 is contracted by rotating the long bolt 5 to widen the space between the shaft box 1 and the spring seat 3, and the height adjusting plate 6 is interposed at this space.

Further, as shown in Japanese Patent Application Laid-Open No. 57-201757, a vertical through hole is formed in an axle box or the like,
The push-up rod inserted into the through-hole is lifted by a push-up device, the interval between the spring seat and the axle box is widened, and the height adjusting plate having a plurality of steps having different heights is rotated to thereby rotate the push-up rod. Some devices adjust the height.

[0004]

However, in a device using a long bolt, if there is not a sufficient distance between the bogie frame and the floor of the vehicle body, the long bolt cannot be inserted, so that the bogie is once mounted. It is necessary to adjust the height separately from the vehicle body. Further, in the device using the push-up bar, there is no axle just below the shaft spring, and a special push-up device is required.

Therefore, the present invention is applied to a case where there is not a sufficient distance between the bogie frame and the floor of the vehicle body, or a case where the shaft spring is disposed between the axle and the vehicle body so that access from above is not possible. It is an object of the present invention to provide a railway vehicle bogie height adjusting device capable of adjusting the height of a shaft spring even if an axle is located directly below the vehicle.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention makes it possible to adjust the distance between an axle box and a spring seat of a shaft spring installed on the axle box, and to increase the distance between the axle box and the spring seat. In a height adjustment device of a bogie for a railway vehicle in which a height adjustment plate is interposed,
A cylinder hole is formed on the upper surface of the axle box, and in the cylinder hole,
A pipe and a supply port for supplying a working fluid to a fluid pressure chamber defined between the piston and the bottom of the cylinder hole by inserting a piston abutting on the lower surface of the spring seat so as to be movable in a liquid-tight and vertical direction. Is formed on the axle box.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in FIGS. The height adjusting device 10 is provided with a cylinder hole 12 formed on the upper surface of the axle box 11.
A working fluid is supplied to a piston 15 having an upper surface in contact with a lower surface of a spring seat 14 of a shaft spring 13 and a fluid pressure chamber 16 formed in the shaft box 11 and defined between the piston 15 and the bottom of the cylinder hole 12. It comprises a supply pipe 17 and a supply port 18.

Although two cylinder holes 12 are formed in this embodiment, the number may be one or more. The piston 15 is provided with a piston seal 19 such as an O-ring.
Accordingly, the liquid crystal display is fitted into the cylinder hole 12 so as to be liquid-tight and movable vertically.

The height adjusting device 10 constructed as described above
Connects the hydraulic jack 20 to the supply port 18, supplies hydraulic oil to the fluid pressure chamber 16 by pumping, raises the piston 15, increases the distance between the spring seat 14 and the axle box 11, The height adjusting plate 21 is inserted to adjust the height of the shaft spring 13.

Therefore, when there is not a sufficient distance between the bogie frame and the floor of the vehicle body 22, or when the shaft spring 13 is disposed between the axle 23 and the vehicle body 22, access from above is not possible. Even if the axle 23 is located directly below the spring 13, the height of the shaft spring 13 can be adjusted, and the height of the shaft spring 13 can be adjusted without separating the vehicle body and the bogie in a completed vehicle state. Since the work can be performed easily and safely by one person, the efficiency is greatly improved.

The height adjustment work can also be carried out at the time of wheel load measurement. When the hydraulic jack 20 is operated at a location away from the vehicle while reading the wheel load value, the height adjustment operation is performed when the wheel load balance becomes optimal. By reading the distance between the spring seat 14 and the axle box 11, the height adjusting plate 21 having a required thickness can be known.

[0012]

As described above, the height adjusting apparatus for a bogie for a railway vehicle according to the present invention has a cylinder hole formed in the upper surface of the axle box, and the piston abutting the lower surface of the spring seat is formed in the cylinder hole in a liquid-tight manner. A pipe and a supply port for supplying a working fluid to a fluid pressure chamber defined between the piston and the bottom of the cylinder hole are formed in the axle box so as to be vertically movably fitted. Connect the device, supply pressure oil to the fluid pressure chamber, raise the piston, widen the gap between the spring seat and the axle box, insert a height adjustment plate at this interval, adjust the height of the shaft spring Can be.

Therefore, when there is not a sufficient distance between the bogie frame and the floor of the vehicle body, or when the shaft spring is disposed between the axle and the vehicle body, access from the upper part is not possible, or when the shaft spring is just below the shaft spring. Even if there is an axle, the height of the shaft spring can be adjusted, and the height of the shaft spring can be adjusted without separating the vehicle from the bogie in the state of the completed vehicle. Because it can be done safely, efficiency is greatly improved. In addition, the height adjustment work can be performed even when measuring the wheel load, and by operating the working fluid supply device at a place away from the vehicle while reading the wheel load value, the spring seat when the wheel load balance is optimal. By reading the distance between the axle and the axle box, it is possible to know the height adjustment plate of the required thickness.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view illustrating an embodiment of a height adjusting device according to the present invention.

FIG. 2 is a plan view showing an inserted state of the height adjusting plate.

FIG. 3 is a partial sectional view showing a conventional height adjusting device.

[Explanation of symbols]

10: height adjusting device, 11: axle box, 12: cylinder hole,
13: shaft spring, 14: spring seat, 15: piston, 16 ...
Fluid pressure chamber, 17: pipeline, 18: supply port, 21: height adjusting plate, 22: vehicle body, 23: axle

Claims (1)

[Claims] 1. A height adjusting device for a bogie for a railway vehicle in which a distance between an axle box and a spring seat of a shaft spring installed on the axle box is adjustable, and a height adjusting plate is interposed at the distance. A cylinder hole is formed in the upper surface of the axle box, and a piston abutting on the lower surface of the spring seat is inserted into the cylinder hole so as to be liquid-tight and movable in a vertical direction, and an image is formed between the piston and the bottom of the cylinder hole. A height adjusting device for a bogie for a railway vehicle, wherein a conduit and a supply port for supplying a working fluid to a fluid pressure chamber to be formed are formed in the axle box.