EP1686034B1 - Sliding bearing for railway vehicles - Google Patents

Abstract

The slider has a carrier plate (4) and a friction plate (5), which are spherical movably supported on the longitudinal ends of a leaf bearing spring. A ball-shaped head on which the plates with a lower ball-shaped calotte are supported is upwardly arranged on the ends of the spring. The head is formed as separate component, which is attached at the ends of the spring. The plates have bars, which downwardly overlaps the spring.

Description

The invention relates to a slider, in particular of rail vehicles, which horizontal relative movements in the longitudinal and transverse direction between the car body and drive or between drive parts allows each other, wherein between the relatively moving parts vertically acting springs are arranged and the spring-loaded slider on a sliding plate, the horizontal relative movements dampens.

It is known from practice, at central, by means of a rotating pan, turntable, guide pin or similar guided bogies elastic supports between the car body and the bogie frame to allow a turning out of the bogie and the means of intermediate, sprung sliders damped relative movements between the car body and allow the bogie and a largely uniform load through the car body, without excessive loading and end load of individual wheels. The contact force of the resilient sliders and thus the partial relief of the guide means of the bogie can be changed by appropriate bias of the springs and sliders.

In the known elastic supports a solid sliding plate is usually provided, which is supported on a sprung slider. The sprung slider is provided in the known embodiments with spring elements that a vertical deflection of this elastic slider to a limited extent enable. The arrangement of a spring element for vertical compliance of the slider, the arrangement of additional guides is required so that the slider is accurately guided in the relative movements of the bogie to the car body.

The known arrangements of elastic supports are therefore very expensive, as a rule. Another disadvantage is that the resilient sliders still have horizontal cross play even in loaded condition. Out of play results in wear due to the dynamics. This lacks the desired rotational inhibiting effect of the lateral sliders at high speeds, so that the bogies tend to roll.

A direct acting rotation inhibition between car body and drive is from the DE-C-2815375 ( EP-A-0004585 ) and DE-A-2842211 known, in which the fixed sliding plate, as known, are formed with a flat sliding surface and the resilient slider with approximately convex sliding surface, wherein the resilient slider consists of a supported only at their longitudinal ends leaf spring, which is stored without play. A disadvantage of these known designs is the simultaneous friction of the sliders in the longitudinal and transverse directions. While in the longitudinal direction some obstruction of the Ausdrehbewegung the drive is desirable to avoid a lurching drive and thus instability, a softer connection of the car body for better decoupling the drive is desired in the transverse direction to avoid resonances and thus Laufgüteminderungen.

Such a device is from the EP 0 362 329 B1 In sliding pieces of the type mentioned above, the friction of the slider on the sliding plate in one of the two horizontal directions is canceled by mounting the slider on coupling elements, which limits unimpeded or almost unhindered sliding of the slider in one of the two horizontal directions (longitudinal direction). or transverse) and fix the slider immovably in the other of the two horizontal directions.

By this arrangement, the slider is firmly connected in the longitudinal direction and acts via its abutment directly and clearance ausdrehhemmend, while the slider is limited in the other of the two directions, freely displaced and thus ensures unimpeded connection in this direction. In practice, however, it has been shown that although the horizontal transverse forces are reduced when entering a track curve, but in the straight line no stable straight-ahead is given and high lateral accelerations are achieved.

The GB 608 937A describes an arrangement with a leaf spring for suspending wheels for a vehicle, in which the two ends of the leaf spring are mounted spherically movable on the vehicle frame. As a result, an additional relative movement of the leaf spring about its axis is to be achieved.

The present invention therefore an object of the invention was to find a slider that requires a relatively low transverse force to the recess when entering the rail arch and on the other hand ensures stable running properties in straight-ahead.

This object of the invention is achieved in that the slider is mounted spherically movable at the longitudinal ends of the leaf spring designed as springs. Here, a ball head is arranged at the longitudinal ends of the leaf support spring facing up, on which the slider is mounted with a lower spherical cap. This arrangement of the slider ensures that the ideas generated when running straight of the rail vehicle suggestions for rolling the drive are effectively damped and tilting of the slider on its counter plate are avoided in vertical bumps of the track. Both the longitudinal and the transverse movements of the drive under the car body are dosed effectively metered. The arrangement of the sliders on the longitudinal ends of the leaf support springs also a simple and economical damping is shown, which requires only a few components and can be adjusted in doses.

According to one embodiment of the invention, the ball head is integrally formed on the longitudinal ends of the blade support spring.

According to a second embodiment of the invention, the ball head is formed as a separate component, which is attached to the longitudinal ends of the Blattragfeder.

Through these training variants opportunities are shown to use the slider on existing blade support springs or to allow for new construction by molding the ball head on the leaf spring a more economical training of the slider.

The slider carries laterally downwardly facing webs, which project beyond the blade support spring down, wherein in the webs transversely below the Blattragfeder a sliding piece against lifting securing bolt is arranged. The safety bolt is arranged with vertical and horizontal longitudinal clearance relative to the leaf spring or the ball head. This safety bolt prevents inadvertent loss of the slider when lifting the car body from the drive.

In the embodiment as a separate component of the ball head is pushed as slid onto the longitudinal end of the blade support spring and there fastened fork, on the upper fork part of the ball head and under the lower fork part a transverse to Blattragfeder extending and the safety pin receiving groove is arranged. The horizontal and vertical clearance of the locking bolt against the blade support spring or the ball head ensures a constraint-free rotation of Blattragfeder rail unevenness against the slider.

The slider consists of a support plate which carries a friction plate on its upper side immovably and in which under the bottom vertically arranged with a sliding insert spherical cap is arranged.

Details of the invention will be explained with reference to the drawing in an embodiment.

• Figur 1 - einen Teilschnitt durch ein Laufwerk mit Blattragfeder und Gleitstück gemäß einer Ausführung der Erfindung
• Figur 2 - den vergrößerten Ausschnitt "A" der Figur 1
• Figur 3 - den Schnitt nach Linie III/III der Figur 2
• Figur 4 - die Draufsicht auf das Gleitstück nach Figur 2

It shows:

• FIG. 1 - A partial section through a drive with Blattragfeder and slider according to an embodiment of the invention
• FIG. 2 - the enlarged section "A" of the FIG. 1
• FIG. 3 - the section according to line III / III of FIG. 2
• FIG. 4 - The top view of the slider after FIG. 2

In the Figures 1 - 4 the invention is explained with reference to an embodiment. On the drive frame (1) near the transverse ends of a leaf support spring (2) is mounted centrally on food pieces (13). The Blattragfeder (2) carries at its longitudinal ends depending on an upwardly facing ball head (3) on which from a support plate (4) and a friction plate (5) existing slider is mounted spherically, which under a counter-plate (6) of the car body (6) 7) is longitudinally and transversely displaceable. The ball head (3) is designed as a pushed onto the longitudinal end of Blattragfeder (2) and there fastened fork, arranged on the upper fork part of the ball head (3) and in the lower fork part a transverse to Blattragfeder (2) extending recess (12) is. The support plate (4) has at the bottom center with a sliding insert (8) provided spherical cap (9) in which the ball head (3) is mounted. Laterally on the support plate (4) of the slider are pointing down webs (10) arranged near their lower longitudinal ends transversely to the Blattragfeder (2) a safety pin (11) inside the recess (12) of the lower fork part of the ball head ( 3) runs and the slider (4, 5) secures against lifting.

Claims (8)

1. Sliding bearing in particular for railway vehicles, which allows horizontal relative movements in the longitudinal and transverse directions between a car or wagon body (7) and running gear (1) or between parts of the running gear, vertically acting springs (2) being arranged between the parts which move relative to one another and the spring-loaded sliding bearing (4, 5) damping the horizontal relative movements by means of a slide plate (6), characterised in that the sliding bearing (4, 5) is mounted at the longitudinal ends of the springs (2), which take the form of supporting leaf springs, to be movable spherically.
2. Sliding bearing according to claim 1, characterised in that there is arranged at the longitudinal ends of the supporting leaf spring (2), pointing upwards, a ball head (3) on which the sliding bearing (4, 5) is mounted by, at the bottom, a spherical cup (9).
3. Sliding bearing according to claims 1 and 2, characterised in that the ball head (3) is integrally formed at the longitudinal ends of the supporting leaf spring (2).
4. Sliding bearing according to claims 1 and 2, characterised in that the ball head (3) takes the form of a separate component which is fastened to the longitudinal ends of the supporting leaf spring (2).
5. Sliding bearing according to claims 1 to 4, characterised in that, laterally, the sliding bearing (4, 5) carries downward-pointing webs (10) which project beyond the supporting leaf spring (2) in the downward direction, with a securing pin (11) which secures the sliding bearing (4, 5) against lifting off being arranged transversely in the webs (10), below the supporting leaf spring (2).
6. Sliding bearing according to claims 1 to 5, characterised in that the securing pin (11) is arranged to have vertical and horizontal longitudinal clearance relative to the supporting leaf spring (2) or the ball head (3).
7. Sliding bearing according to claims 1 to 6, characterised in that the ball head (3) takes the form of a forked member which is slid onto the longitudinal end of the supporting leaf spring (2) and is fastened in place there, on the upper part of which forked member the ball head (3) is arranged and below the lower part of which forked member a recess (12) is arranged which extends transversely to the supporting leaf spring (2) and which receives the securing pin (11).
8. Sliding bearing according to claims 1 to 7, characterised in that the sliding bearing (4, 5) comprises a carrier plate (4) which carries at the top a friction plate (5) in such a way that the latter is non-displaceable and in the bottom of which the spherical cup (9), which is provided with an insert (8) allowing sliding, is arranged vertically.

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