JP2002067943A - Single axle wheel set with external suspension support part for railway rolling stock with pendulum suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single axle wheel set equipped with an external suspension support part for railway rolling stock equipped with a pendulum suspension. SOLUTION: This wheel set is constituted of a flat and horizontal chassis attached with an independent movable wheel, and a vertical suspension support part positioned at an external part of the wheel with upper part mutually connected by a crossbar forming a portico. A suspension spring is disposed on the upper part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-axle wheel set for a railway vehicle provided with a pendulum type suspension.
Concerning the improvement introduced in the suspension chassis of the axle wheel sets), it comprises a chassis with independent movable wheels, the chassis comprising a pendulum suspension system in which suspension springs are arranged on the upper part of the upright support means. Have.

[0002]

2. Description of the Prior Art Until now, low-floor railcar uniaxial wheel sets with pendulum suspensions have incorporated a yoke-shaped chassis with a vertical suspension support mounted in the wheel area.

Regarding this prior art, Spanish Patent No. 42
No. 4,615, 454,721, 474,678 and 527,222, which are represented in FIG. 1 of the accompanying drawings and schematically illustrate the suspension systems currently used in railway vehicles of the type mentioned. Shown in

Furthermore, EP-A-0 844 231 entitled "Single-axle wheel with independent movable wheels for articulated car transport wagons"
setwith independent moveable
e wheels for articulated ca
r-transporting wagons)
A uniaxial wheel set having a chassis of a shape similar to that described in the preamble of claim 1 is disclosed.

In FIG. 1, the chassis of a known type of uniaxial wheel set is indicated generally by 1 and comprises a yoke shape having inverted U-shaped end portions 4, 4 ',
Wheels R are mounted on corresponding bearing housings (not shown) belonging to this type of uniaxial wheel set. The suspension supports 2, 2 'are precisely mounted on said parts 4, 4', the suspension supports each terminating in their upper part with a shock-absorbing spring, in particular a pneumatic spring 3, 3 '.

[0006]

However, this type of prior art suspension chassis has the disadvantage of limiting the maximum diaphragm passage width between passenger cars to about 800 mm. This is because the frame 5 must be accommodated between the inner legs 6, 6 'of the yoke-shaped chassis 1 and the suspension supports 2, 2'.

[0007]

SUMMARY OF THE INVENTION It is possible to have a wider diaphragm passage to facilitate the passage of passengers between passenger cars and to increase comfort when traveling between accessible areas in a train. To achieve this, a new type of axle wheel set having a suspension system, wherein the chassis of the axle wheel set is a flat and horizontal chassis, the suspension support is made of a frame in the form of a pouch, A single-axle wheel set is designed wherein the lower end of the upright leg of the wheel is attached to the flat chassis at the location of the outer portion of the wheel, the upper rung incorporating a shock absorbing spring adjacent its outer end. ing.

[0008] In a preferred embodiment of the present invention, the mounting position of the lower end of the leg of the pouch is located directly above the outer bearing box of each wheel.

According to another preferred embodiment of the present invention,
In the meantime, an articulated bar (artic) for controlling the position of the wheel set with respect to the box of the passenger car in which the wheel set is placed.
The fixation of the system of ulterated bars takes place in the lower outer part of the legs of the pouch.

Next, the uniaxial wheel set according to the present invention will be described in more detail with reference to the accompanying drawings.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, FIG.
As mentioned above, the general arrangement of a prior art uniaxial wheel set for a railway vehicle with a pendulum suspension is schematically illustrated.

Referring now to FIG. 2, this represents a novel wheel set 10 having a suspension portico according to the present invention. The wheel set 10 has a flat and horizontal chassis B, and a wheel R is mounted on an end portion thereof.

Externally, the lower end of the frame in the form of a pouch is connected to each of the wheels R of the vehicle set 10 by four.
Fixed to the chassis at 0, 40 ', said skeleton comprises uprights 20, 20' having a square cross-section, but which may be of any shape, such as generally polygonal or circular, and a substantially straight and horizontal upper rung 22. Is done. In particular, pneumatic shock absorbing springs 30, 30 'are mounted adjacent to the upper end of the upper rung 22. The spring makes it possible, in a known manner, to adapt the box of the passenger car thus suspended to the position required for turning a curve. Finally, 50 shows a diaphragm frame that allows passengers to move between passenger cars.

According to a first preferred embodiment of the invention, the lower ends of the uprights 20, 20 'are mounted directly on bearing housings which support the outer ends of each independent wheel of the wheel set 10.

According to another preferred embodiment of the invention,
In order to control its position with respect to the box of the coach in which the wheel set 10 is located,
A fixed portion may be provided to couple the articulated wheel set guide bar system (indicated generally by numeral 60) thereto.

As can be seen in FIG. 2 of the drawings, this particular solution allows the passage diaphragm to have a maximum width greater than possible with prior art suspension systems, which is approximately 1200 mm. And two passengers carrying suitcases can pass each other as they move between passenger cars, much larger than is typically found in railway equipment currently in use.

Other advantages provided by the novel wheel set according to the invention include: a larger auxiliary volume can be taken for the pneumatic suspension spring; and a pouch-co type construction results in a larger machine set for the wheel set unit. Is to give the target strength.

[Brief description of the drawings]

FIG. 1 shows schematically a suspension system currently used in railway vehicles of the type according to the invention.

FIG. 2 schematically shows a suspension system according to the invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Uniaxial wheel set chassis 2, 2 'Suspension support part 3, 3' Shock absorbing spring 4, 4 'End part 5 Frame 6, 6' Inner leg part 10 Wheel set 20, 20 'Upright part 30, 30' Shock absorbing Spring 22 Horizontal rung 40, 40 'End 50 Frame 60 System B Chassis R Wheel

Claims (3)

[Claims] 1. An external suspension support for a pendulum-type railway vehicle, comprising a chassis with independent movable wheels, the chassis having a pendulum-type suspension system whose suspension spring is located on an upper portion of the upright support means. A set of uniaxial wheels, wherein the chassis is a flat, horizontal chassis, the suspension support is comprised of a frame in the form of a pouch, and the lower end of the upright leg of the pouch is an outer portion of the wheel. A uniaxial wheel set, mounted on said flat chassis at an upper point, the upper rung incorporating a shock absorbing spring near its outer end. 2. The mounting point of the lower end of the leg of the portico is located directly above an outer bearing box of each wheel.
The uniaxial wheel set according to claim 1. 3. The fixing of a system of articulated bars for controlling the position of the wheel set with respect to the box of the coach, between which the wheel set is located, is performed in the lower outer part of the legs of the pouch. The uniaxial wheel set according to claim 1, wherein