JPS5848382B2 - Tetsudoshiyariyoudaishya - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bogie for a railway vehicle, and in particular, by swingably providing a wire/cable on an arm supporting each axle, the full load of the vehicle can be well absorbed. This invention relates to a bogie for a railway vehicle that increases the restoring force of the vehicle against lateral loads.

Patent Application No. 39781 (1978)
The railway vehicle bogie described in No. 538) has one main transverse beam and two axles arranged substantially parallel to each other,
Each axle has a pair of wheels, and each of the transverse beams is provided with two spring bars arranged parallel to the transverse beam.

The spring rod and the shaft are connected to each other by arms pivotally attached to both ends of the spring rod.Furthermore, leaf springs are arranged on both sides of the truck, and the leaf springs are arranged at the center of the spring rod. It is fixed to the horizontal beam, and both ends thereof are connected to the arm via rod-shaped links.

When such a railway vehicle suddenly receives a lateral load such as when traveling around a curve, the spring bar elastically
The two wheels on the outer circumference of the curve absorb a lateral load, and the two wheels on the outer circumference of the curve receive a downward load due to centrifugal force and are separated from each other by the rotation of the arm. are brought close to each other.

As a result, each wheel is oriented in a direction along the curve, which improves the running performance of the train and at the same time reduces wear on the rails.

However, in such vehicle bogies, although the curved rails have good running performance, the absorption of lateral loads that occur when transitioning from a straight road to a curved road is not sufficient, and it is difficult to obtain sufficient stability of the vehicle. There was a problem.

The present invention solves these drawbacks and provides a bogie for railway vehicles,
Particularly in bogies for railway freight cars, this system is designed to better absorb sudden loads acting in the lateral direction than before.

According to the present invention, both ends of the leaf spring are connected to A1 by a connecting unit L, as described below, instead of a simple link as in the conventional case.

This connecting unit 1 includes a wire cable that is pivotally connected to a leaf spring and swingably attached to an arm, and a wire cable that is fixed to the arm and presses against the wire cable when the arm swings laterally. It has this joint.

Preferably, each wire cable is endless, and a horizontal bolt is pivotally connected to both free ends of the leaf spring, and the wire cable is hooked to the horizontal bolt via a pulley.

Furthermore, preferably, the connection unit has a cable guide integrated with the joint, and the cable guide and the joint are provided with a cable groove into which the wire cable fits, and the cable guide and the joint are provided with a cable groove into which the wire cable is fitted. The cable groove is shaped so as to curve outward from the arm.

Embodiments of the present invention will be described in detail below based on the drawings.

As shown in FIGS. 1 and 2, the truck 1 has main horizontal beams L and 2.
On both sides of the upper transverse beam 2, spring bars 9 are arranged substantially parallel to the main transverse beam 2, and the spring bars 9 are
Self-aligning bearings 3 provided at both ends of the main transverse beam 2
, 3.

Further, the ends of an arm 5 are pivotally connected to both ends of the spring bar 9, and the other end of the arm 5 is attached to both ends of a self-aligning bearing 7 of an axle 80 disposed substantially parallel to the horizontal beam 2. It is pivoted by.

That is, the axle 8 and the spring rod 9 are connected by this arm z,5.

The attachment portion of the arm 5 for the eight-diameter axle has a fork-like structure.

Furthermore, wheels 4 are fixed to the axle 8.

With this structure, when the truck receives a lateral load, the arm 5 swings laterally, and the spring bar 9 bends in an S-shape in plan.

Furthermore, a ball bearing 6 is provided at the center of the horizontal beam 2 to support the upper structure of the freight car.

Additionally, leaf springs 12 are provided on each side of the truck 1 to vertically support the truck 1.

The central portion 13 of each leaf spring 12 is fixed to both ends of the horizontal beams j and 2 by bolts 1 and 14, respectively.

The bolts 15 are inserted into ring holes at both ends of the leaf spring 12.

Both ends of this bolt 150 protrude from the annular hole of the spring, and the cable pulley 16 is rotatably attached thereto.

Furthermore, a cable guide body 17 is provided above the arm 5 so as to cover the upper part and both sides of the arm 5. A cable groove 18 is formed.

This guide body 17 is detachably fixed to the arm 5 by a screw 19.

Further, on both sides of the cable guide body 170, contact stands 20 are formed which come into contact with the endless wire cable 21 when the trolley 1 rolls sideways.

The wire cable 21 is then fitted within the cable assembly 18 and wrapped around a cable pulley 16 attached to the end of the leaf spring 12.

Therefore, when the arm 5 shakes horizontally, the abutting table 20
is pressed against the wire cable 21, and the endless cable 2
1 is bent, and its elastic force limits the horizontal movement of the arm 5.

Further, in this embodiment, the abutting table 20 is connected to the cable guide body 1.
7 and has a curved surface 22 for engaging wire cable 21 as shown in FIG.

The distance between the starting point of the wire cable 210 contacting the contact base 20 and the contact point of the cable support 16 changes during the deflection movement of the arm 5 in the lateral direction.

In other words, this distance decreases on the − side of arm 5;
Increase on the other side.

As a result, as will be described below, the cable 21 is elastically deformed and provides a restoring force to the arm 5 that has swung laterally.

By forming the curved surface 22 in various shapes, desired characteristics can be given to the horizontal component force within the cable 21 that acts as the restoring force generated on the arm 5.

When the arm 5 swings horizontally and the distance between the contact points of the wire cable 21 and the abutment stand 20 and the cable boo 916 decreases, the wire cable 21 between these contact points gradually moves away from the vertical direction. As a result, the wire cable 21 produces a characteristic in which the restoring force of the arm 5 increases in proportion to the amount of inclination and bending.

A portion of the restoring force of the arm 5 to its initial position is thus generated by the coupling units l. shaped by part numbers 16 to 22, which is proportional to the weight of the truck and increases as the load on the truck increases. It operates by increasing at a rate greater than the rate of increase.

Part of the restoring force is also generated by the spring bar 9 acting as a flexible spring, which has an almost directly proportional characteristic.

The operation mode of such a combined vehicle is as follows.

When lateral shocks act on the wheels, for example as a result of lateral movement of the track from its normal position, or when the bogie follows a corrugated path or enters a curved path, these shocks An attempt is made to change the linear direction of travel and thus to move the pair of wheels laterally.

For each pair of wheels, a respective two arms 5 swing laterally around ball bearings 3, in which case these arms 5
It swings against the restoring force acting cumulatively on the cable 21 and the restoring force acting proportionally on the spring bar 9.

This means that the shaft 8 of the wheel 4 is mounted on a self-aligning bearing 7 at the end of the arm 5.
This is possible because it is mounted on the

In this case, with the help of the coupling unit 16 L/22 which has an increasing progressive characteristic of restoring force, it becomes possible to receive a relatively large load applied in the lateral direction to the truck with a small swing of the arm.

The cable guide 17 can be replaced by another cable guide 17 shaped to suit the particular trolley type.

Cable guide bodies 17 adapted to different truck types have different shapes of abutment bases 20, particularly different curved shapes of surfaces 22.

In this way, by preparing the cable guide bodies 17 having various joint shapes and making each one of them interchangeable, it is possible to adjust the cumulative increase characteristics of the connecting units 16 to 22 as desired. be.

This interchangeability is particularly convenient when, for example, it is necessary to assemble truck-L section structures of different weights to the same truck. Without limitation, the present invention allows a relatively simple device to better absorb lateral shocks acting on the arm 5 over its entire range of motion than heretofore.

Furthermore, it is advantageous that it is possible to replace the abutment platform 20 with a receptacle, if desired, to suit different configurations and different wagon types.

The present invention can be implemented in the following aspects 1.1. A trolley according to the claims, wherein each wire cable is an endless cable.

2. A trolley according to item 1 above, in which each free end of the leaf spring carries a transverse bolt, to which are attached two pulleys, each of which pulls a cable.

3. A trolley according to claim 1 or 2, wherein each connecting unit has a cable guiding body integral with the two connecting units.

4. The integral cable guide may be a cable guide according to paragraph 3 above, including a cable channel. ,

[Brief explanation of the drawing]

Figure 1 shows a trolley implementing the present invention. FIG. 2 is a partial plan view of the truck, and FIG. 3 is a cutaway view of the arm taken along the line ■-■ in FIG. 1. 1...Bolly, 2...--Main horizontal beam, 3...
...Single ball bearing, 4...Wheel, 5...
・Earth, 6...Ball bearing, 7...Mountain alignment bearing, 8...Axle, 9...Spring bar, 12... ...Plate spring, 13...1 tightening part,
14, 15... Bolt, 16-... Cable pulley, 17... Cable guide, 18-...
・″...Cable groove, 19...Screw, 20...
-...Abutting stand, 21...Endless wire/cable, 22...Bending.

Claims (1)

[Claims] 1 A main transverse beam and two axles having a pair of wheels, each axle being connected to the transverse beam via an arm provided on each side of the truck, the arm being connected to the main transverse beam. The bogie has a leaf spring pivotally connected to each axle and the beam to allow vertical and lateral swing of each arm relative to the main transverse beam, and each leaf spring is connected to the main transverse beam. It is fixed to the beam at its central part and each of its ends is connected to each of the arms by means of a connecting unit, each connecting unit 1 having a wire cable connected to the arm and the leaf spring; a joint that is fixed to each arm and contacts the wire cable and deflects the wire cable when the arm swings laterally relative to the main horizontal beam of the truck; A railway vehicle bogie characterized by having the following features: