JPS61211159A - Meandering preventive device for railway rolling stock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a meandering prevention device for a railway vehicle that is designed to improve riding comfort.

[Prior art]

In general, railway vehicles running on one track are shown in Figures 6 and 7.
As shown in the figure, a plurality of bogies α [having a plurality of axles (4) that can run on the track (1) are arranged at predetermined intervals in the longitudinal direction of the track (1), and a bogie Ql The vehicle body (B) is supported by a pillow spring (to) button placed between the vehicle body (B) and the vehicle body (B).

Such a railway vehicle has a bogie structure that elastically supports the underframe (6) with each axle (4) using an axle spring (8).
The axial spring (
8) and pillow springs (to) to reduce the vibration of the vehicle body αυ.

However, when a railway vehicle runs at high speed, various vibrations appear in the vehicle body (b). The causes of these vibrations are (g) wheel road surface gradient/tire flange thickness; (B)
Frictional resistance of the bearing, (C) Damping force of the shock absorber of the lateral movement e-axis, (D)
Possible causes include track misalignment, elevation misalignment, gauge condition, track bed, etc.

Here, vibrations that occur in the vehicle body around the vertical, horizontal, or longitudinal axes generally have a natural frequency determined by the vehicle inertia and spring constant, and the magnitude of the vibration decreases when the frequency exceeds the natural frequency. However, vibrations caused by the snake motion of the trolley as it rotates relative to the car body tend to be difficult to reduce even if the vibration exceeds the natural frequency.

[Problem that the invention seeks to solve]

Conventional models are configured as described above, so the vibrations caused by the bogie's snake motion during high-speed running can impair ride comfort in passenger cars and adversely affect on-board equipment in locomotives. There was a problem with giving people a chance to live.

This invention was made to solve the above-mentioned problems, and aims to provide a snaking prevention device for a railway vehicle that improves riding comfort. Means] The anti-snaking device for a railway vehicle according to the present invention includes a hydraulic device that acts in a direction to prevent rotation when the bogie rotates relative to the car body at a speed greater than a predetermined value between the bogie and the car body. It has been established.

[Effect]

In the anti-snaking device for a railway vehicle according to the present invention, when the bogie rotates relative to the car body and the rotational speed exceeds a predetermined value, the hydraulic system prevents the bogie from rotating.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure and Fig. 2, (1) is the track, (2) is the wheel,
(3) is an axle with wheels (2) fixed to both ends, t2 above.
), (Axle (4) that can run on the track (1) at 31
is formed. (5) is a bearing box that rotatably accommodates both ends of the axle (4), (6) is an underframe, and (7) is an axle box support provided on the underframe (6). ) are arranged at a predetermined interval on both sides in the longitudinal direction, and each accommodates a bearing box (5) movably in the vertical direction.

(8) is a shaft spring disposed between the bearing box (5) and the underframe (6), (9) is a spring receiver provided on the outside of the approximately central portion of the underframe (6) in the longitudinal direction; (4) to (9) above
) A bogie is formed that can run on the track (1). (
9) is a car body placed on a bogie member, and (2) is a spring receiver provided on the car body (B), which is arranged at a position facing the spring receiver (9) of the bogie Ql. (To) Spring retainer (9)
The pillow springs 04 are respectively arranged between the spring receivers (9) and (2) and the pillow springs (to), and 04 is a vibration isolating member arranged between the spring receivers (9) and (2) and the pillow springs (to), and is made of, for example, rubber. has been done. (To) is a hydraulic system that is placed between the bogie α [and the car body (B) at both ends of the bogie l, which are almost perpendicular to the longitudinal direction. The cylinder (15a) and the piston (15b
), and for example, when the operating speed of the piston (15b) is greater than a predetermined value, a predetermined damping force is generated in the operating direction υ, as shown in FIG.
The pistons (15b) are each attached to the trolley a1,
The cylinders (15a) are each attached to the vehicle body αη. In the figure, DI is the arm provided on the truck a1 and engaged with the hydraulic system (to), and (L't) is the arm that is attached to the vehicle body (6).
) and engaged with the hydraulic system (to);
) is the center where the bogie (b) supports the car body (6).

Next, the operation will be explained. While the vehicle is running in the state shown in Figures 1 and 2, when the bogie (IG) rotates with respect to the vehicle body (B) as shown in Figure 3, one of the hydraulic The device (to) is extended in a direction to extend the installation interval, and the other hydraulic device (to) is operated in a direction to reduce the installation interval.

Here, if the rotation of the bogie a is due to the meandering motion when traveling at high speed on the straight section of the track (1), then the rotational speed of the bogie α is determined by the setting operation of each hydraulic system (to). The speed may be exceeded. Therefore, trolley Q1. When the rotational speed of the hydraulic device aQ exceeds the set speed of the hydraulic device aQ, a damping force that opposes the rotational force is rapidly generated in each hydraulic device as shown in FIG. A restoring force is generated that opposes the rotating force.

In addition, when the train is forcibly rotated along the curve of the track (1), the rotational speed of the bogie Ql is lower than the speed set for the hydraulic device αυ, so each hydraulic device (
) operates smoothly and no damping force is generated.

Note that the characteristics of the above-mentioned hydraulic system αQ may differ depending on compression operation and tension operation, as shown by solid lines and broken lines in Figure 4, respectively, but as long as the error is within about 10 yen, there will be no particular problem. , as shown in FIG. 2, a predetermined movement can be obtained by arranging them so that they can expand and contract, respectively.

FIG. 5 shows another embodiment, in which a pair of hydraulic devices are disposed on both sides of the truck α [in the longitudinal direction], and the same effects as in the above embodiment are expected.

In the above embodiments, a case has been described in which a pair of hydraulic devices are arranged, but the effect can be further increased if a plurality of pairs of hydraulic devices are arranged.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a snaking prevention device for a railway vehicle according to an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is an operation factor, Fig. 4 is a curve diagram, and Fig. 5 is a diagram of the present invention. 6 is a side view of a vehicle, and FIG. 7 is a side view of a conventional truck. In the figure, (1) is a track, (2) is a wheel, (4) is an axle, Ql is a truck, (6) is a vehicle body, and αQ is a hydraulic system. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (3)

[Claims] (1) A car body is supported by at least a pair of bogies that can run on a track, and when the bogie rotates with respect to the car body, the bogie expands and contracts between the bogies and the car body, and the rotational speed of the bogies is maintained at a predetermined speed. What is claimed is: 1. A snaking prevention device for a railway vehicle, comprising at least a pair of hydraulic devices that generate a predetermined damping force when the value exceeds a value of . (2) A snaking prevention device for a railway vehicle according to claim 1, wherein the hydraulic system is arranged substantially parallel to the axle. (3) The anti-snaking device for a railway vehicle as set forth in claim 1, wherein the hydraulic system is arranged substantially perpendicular to the axle.