JPS5855091Y2 - Spring device for railway vehicles - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a spring device for a railway vehicle.

A conventional spring device will be explained with reference to FIGS. 1 to 4.

Figures 1 and 2 are examples of industrial vehicles incorporating conventional spring devices.

In the figure, numeral 1 is the car body, numeral 1a is a spring provided on the car body, numeral 1b is an axle box guard fixed to the car body with bolts, etc., and numeral 2 is an axle box. They fit together with a gap.

A tilting piece 3 is placed on top of the axle box 2, and a spring plate (
Bottom) 4 is placed.

An elastic body 5 such as a coil spring is inserted between the vehicle body side spring 1a and the lower spring 4.

Normally, coil springs are often used to elastically support the body of a railway vehicle because they are easy to construct, but these coil springs have poor vibration damping properties and cannot be used in some way to dampen the vibrations. We have also used a mechanism to provide this.

(For example, oil damper, etc.) In the examples shown in FIGS. 1 and 2, the inclined piece 3 is also used in order to obtain a damping effect.

The principle of obtaining a damping effect by tilting the tilting piece 3 will be explained with reference to FIG. 2.The vehicle body load is transmitted to the lower spring 4 via the spring 5, and from there to the tilting piece 3.

From this point, a mechanical component of the load corresponding to the inclination angle α of the tilting piece acts on the axle box 2 and the axle box guard 1b that are in contact with each other.

(Figure 3 illustrates this even more clearly.

) When the vehicle is running and the spring is displaced due to an increase or decrease in vibration, vertical slip will also occur between the tilting piece 3 and the axle box guard 1b, but at this time, the coefficient of friction and component force (C ) is generated.

This is the damping force, and it is increased or decreased by changing the friction coefficient between the axle box guard 1b and the tilting piece 3 and the inclination angle of the tilting piece 3.

Since the tilting piece 3 slides in contact with the axle box guard 1b, the axle box 2, and the axle spring seat (lower) 4, as shown in FIG. 4, parts a, l), and c are hardened, etc. This is done to prevent wear.

As mentioned earlier, an appropriate clearance is provided between the axle box 2 and the axle box guard 1b in the longitudinal and lateral directions, so that the axle box 2 and the axle box guard 1b can be moved in either direction by the traction force or braking force of the vehicle. It also moves in the left and right directions when it receives a lateral force, such as when passing through a curve.

Although the conventional example described above has a relatively simple structure and can easily obtain a damping force, the same frictional force acts in the longitudinal and horizontal directions as well as in the vertical direction.

Moreover, this force acts as a constant force regardless of the amount or speed of movement, and furthermore, in the conventional method, vibration is transmitted from the wheel to the axle box 2 → tilting piece 3 → spring seat (lower) 4 → spring 5 → the vehicle body. Even in the process of vibration, they are connected metallically, so it was not possible to expect a vibration-proofing effect against vibrations with small excitation force, such as chatter vibrations.

As described above, the present invention provides a spring device for railway vehicles that makes it easy to adjust the spring constant in the lateral direction and provides a vibration-proofing effect to the vertical load transmission system while taking advantage of the advantages of the conventional structure. The purpose is to

An embodiment of the present invention will be described below based on FIGS. 5 to 7.

First, FIG. 5 shows the constituent countries of the tilted top 30, which is the basis of the present invention.

In the figure, numeral 31 is a sliding plate bent into an L shape, and numeral 32 is made of a material with good wear resistance such as hardened carbon steel.
is a backing plate, which is also preferably made of the same wear-resistant material as the sliding plate 31.

Reference numeral 33 is rubber, and the sliding plate 31 and the contact plate 32 are vulcanized and bonded.

It goes without saying that the size of the rubber should be large enough to withstand the applied force.

Furthermore, the sliding plate 31 and the contact plate 32 need to be shaped so that they do not touch each other in order to enhance the vibration-proofing effect.

FIG. 6 shows an example in which the inventive top is incorporated in place of the conventional metal tilting top.

The other structure of the tilting piece 30 is the same as the conventional one, and the damping effect of the tilting piece during vibration is also exactly the same, so a description thereof will be omitted.

With this type of structure and assembly method, a relatively high bounce constant can be obtained because the compression and shear of the rubber acts in the longitudinal and vertical directions of the vehicle, while the shear of the rubber acts in the lateral direction of the vehicle. Since it acts in the direction, a relatively low spring constant can be obtained, and the method shown in Figure 7 allows the lateral spring constant to be made non-linear, meeting the requirements for advanced running characteristics. I can do it.

Furthermore, since the system is cut off by rubber, a sufficient vibration-proofing effect can be expected.

Figure 8 shows a modification of the assembled state of the top of the present invention.

In the figure, a sloped portion that generates a pressing force in the front-rear direction is provided on the spring seat (lower) 4', and no slope is provided on the axle box 2' side.

FIG. 9 shows a conventional tilting frame 100 with a rubber 102 and a slip plate 101 attached to the part that contacts the shaft spring seat (bottom), and the rubber is bonded to the part that contacts the shaft box. By attaching the plate 101' with adhesive or the like, it is possible to provide the same performance as in the case of the shape shown in FIG.

By configuring as described above, 1. It is possible to provide an appropriate lateral spring constant for proper lateral movement of the vehicle with a simple structure that takes advantage of the advantages of the conventional example.

2. By adding rubber to the metal vibration transmission system, high-frequency vibrations can be effectively blocked.

It is possible to improve vehicle performance such as

[Brief explanation of the drawing]

Fig. 1 is a side view of the industrial vehicle, Fig. 2 is a partially enlarged view of Fig. 1, Fig. 3 is an explanatory diagram of acting force, Fig. 4 is a perspective view of a tilted frame,
FIG. 5 is a diagram of a tilting top according to the present invention, FIG. 6 is a spring device according to the present invention, FIG. 7 is a diagram of a tilting top according to another embodiment of the present invention, and FIG. 8 is a spring device according to another embodiment. and FIG. 9 are diagrams of a tilting top according to another embodiment of the present invention. 2...Axle box, 1b...Axle box keeper, 3,3
0... Tilt piece, 5... Spring.

Claims (2)

[Scope of utility model registration request] (1) In a spring device consisting of a spring and an inclined friction piece, which is provided between the car body of a railway vehicle and the bearing box of its wheels, and which elastically supports the car body, a sliding plate having a cross-sectional shape and an inclined It is characterized by consisting of an inclined friction piece and a spring for supporting the car body, which are arranged at intervals so that they do not come into contact with each other when the car body vibrates, and a rubber elastic body is glued between them. Spring device for railway vehicles. (2) Utility Model Registration Scope of Claims In the device described in claim 1, the inclined friction piece is formed by bonding a rubber elastic body to the spring pressure side and the inclined surface side of a sliding plate having a triangular cross section. Something that is characterized by something that has happened.