SK8262000A3 - Railway vehicle bogie - Google Patents

Abstract

The traveling gear has a frame with wheel sets connected to a bogie frame via spring and guide elements. A deformable bogie frame (1) has a torsion-proof cross strut (2) and longitudinal struts (3), and axle guide bearings (14) integrated in lower booms (12) of the longitudinal struts. Two displaceable thrust pieces and link-connected spring assemblies are located on the axle guide bearings. The spring assemblies are also supported on the bearings (8) via spring sets (4). The thrust pieces are pressed against the axle bearings by spring caps (5).

Description

Technical field

The invention relates to a bogie for rail vehicles, in particular for freight wagons.

BACKGROUND OF THE INVENTION

When dimensioning bogies of this kind, essentially the following problem areas have to be taken into account. Increased total vehicle weight and thus increased axle loads increase chassis load. Naturally, the aim is to use this weight gain to increase the potential load on the vehicle, therefore, despite the higher loads, the chassis weight should not increase or only less than proportional to the weight of the whole vehicle.

Increasing the gross vehicle weight also increases the weight difference between an empty and a fully laden vehicle. Since the maximum suspension by the permissible variation of the vehicle bumper condition is limited and the possible loading volume is directly influenced by the design of the suspension, the suspension must be adapted to the changed conditions. Appropriate precautions must be taken against any changes to the handling characteristics associated with it, particularly when the vehicle is unladen.

Various bogies are already known which are operated with wheel loads above 22.51.

Part of the known bogies of this kind are operated under special conditions. An important limitation for these bogies is the speed limitation. Thus, the use of these vehicles is only possible under precisely known conditions, for example in the operation of complete trains.

Although the Y 25 DRRS and ANF 25 bogies are designed for speeds above 90 km / h and 25 t wheel load, due to the considerably increased weight compared to the standard Y 25 bogie, the increase in possible load due to increased wheel load is only lower than proportional.

-Other bogies, such as the Y 25 TTV, achieved the required static strength by local reinforcements of the standard Y 25. Due to the relatively rigid axle guidance of these bogies, as is known from the Y 25 bogie, with higher wheel loads, forces increase and thus increase abrasion between the wheel and the rail.

SUMMARY OF THE INVENTION The object of the present invention is to provide a bogie of the aforementioned type which is robust and low cost and which can be driven at speeds above 90 km / h with axle loads above 22.51 without exceeding the permissible rail forces. the weight of which does not increase or is less than proportional to the weight of the overall vehicle, the noise of which is less than that of the standard Y 25 bogie, and this bogie allows for gentle use with regard to the rails, i. j. For example, the forces transmitted from the bogie to the rail and hence the rail and axle abrasion should be kept to a minimum and, in addition, the noise load should be reduced with this bogie.

SUMMARY OF THE INVENTION

The subject of the invention is a bogie for rail vehicles, in particular for freight wagons with a bogie frame rotatably mounted on a wagon body, in which the wheelsets are connected by spring and guide elements to the bogie frame and the bogie is designed to be axle weights higher than conventional weights the 22.51 axle could be driven at speeds above 90 km / h, creating a torsion-soft undercarriage frame with torsionally rigid crossbeam and longitudinal beams, and the axle bearing guides are directly integrated into the longitudinal beam bottom rail and are arranged on the axle bearing guides each of the two push-free push elements and the suspension eyelet of the spring cap assembly, which in addition bears on the axle bearing over the spring assemblies, and that the pressure elements are pushed on both sides by the spring caps towards the axle bearing.

In another embodiment of the invention, a single steel compression spring having a progressive spring characteristic is provided instead of the spring assembly.

In another embodiment of the invention, the pusher elements may be coated with a high-load plastic.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a side view of the chassis,

Fig. 2 is a top view, and

Fig. 3 is a section A - A of FIG. Second

DETAILED DESCRIPTION OF THE INVENTION

According to FIG. 1, the chassis consists essentially of torsion of the soft frame J of the chassis with the crossbeam 2, the two longitudinal beams 3 and the sets 4 of the springs, the spring caps 5, the lifting eyes 6, thrust elements 7, axle bearings 8 and the wheelsets. in a manner and via a pivot pin 17, it is connected to the wagon body. The transverse ends of the crossbeam 2 are butt-connected to the longitudinal beams 3. The lower web 11 of the crossbeam 2 is connected to the lower web 12 of the longitudinal beam 3. The upper web 10 of the cross beam 2 is connected to the web 13 of the longitudinal beam 3. The lower band 12 of the longitudinal beam 3 consists essentially of the following parts: the central part and the axle bearing guides 14. The axle bearing guides 14 are in the form of castings, in which the thrust elements 7 are located and connected to the spring caps 5 via the lifting eyes 6. By means of the inclined adjustment of the hinge eyes 6, a force component is formed in the direction of the axle bearing 8. Thus, the spring caps 5 engage the thrust elements 7. The spring assemblies 4 form a connection between the axle bearing guides 14 and the axle bearings 8. The spring 16 is supported directly by the axle bearing guide 14 from a certain amount of bogie load. A wheelset 9 with axle bearings 8 mounted thereon is guided between the thrust supports 7. a rigid section in the main load zone of the chassis frame J and the longitudinal beams 3, which are soft in bending, create additional elastics in the less loaded sections of the chassis, which advantageously affect the driving characteristics of the vehicle. By integrating the axle bearing guide 14 into the lower web 12 of the longitudinal beam 3, an improvement in the force loading and thus an increase in the dynamic strength while reducing the weight of the component is achieved. At the same time, it is possible to reduce the accuracy and thus the construction costs when welding the chassis frame 1, since with the corresponding casting allowances the final mechanical machining of the entire chassis frame 1 is possible. The spring assembly 4 has a progressive spring characteristic that can be as shown in FIG. 3, to reach the point of engagement of the inner spring 16, depending on the load of the chassis frame 1. A similar spring characteristic can also be achieved by a helical compression spring with specially shaped spring ends (TKS spring). The advantage of this embodiment is less noise when the vehicle is unladen, since with the spring assembly 4, the unloaded inner spring 16 can move freely ("knock") and thus lead to more noise. Due to the force component that is transmitted through the thrust elements 7 in the direction of the axle bearing 8, damping occurs during relative movements between the axle bearing 8 and the axle bearing guide 14. This damping depends on the load. The damping must not be too high, especially when the vehicle is unladen. Advantageously, the thrust elements 7 are designed such that the friction coefficient between the axle bearing 8 and the thrust element 7 has a constant, low value in order to improve the driving characteristics of the unladen vehicle. One embodiment is not to coat the steel base body of the pusher 7 with a high-load, low-wear and self-lubricating plastic. This embodiment simultaneously reduces the transmission of sound in the rigid material from the wheelset 9 to the other components of the chassis. By double-sided clearance X of the axle bearings 8 in the axle bearing guide 14, better radial adjustability of the wheel set 9 in the track arch is achieved and thus the abrasion between the wheel and the rail is reduced.

Claims (3)

PATENT CLAIMS 1. A bogie for rolling stock, in particular for freight wagons with a bogie frame, rotatably mounted on a wagon body, in which the wheelsets are connected by means of spring and guide elements to the bogie frame and the bogie shall be designed so that axle loads higher than a 22.5 t axle could be driven at speeds above 90 km / h, characterized in that the torsion frame (1) of the chassis with a torsionally rigid crossbeam (2) and longitudinal beams (3) and guides (14) is formed in torsion. ) the axle bearings are directly integrated into the lower web (12) of the longitudinal beam (3) and two push-push elements (7) and the lifting eyes (6) are arranged on the axle bearing guides (14). ) spring cap assemblies (5), which in addition are supported on the axle bearing (8) via spring assemblies (4), and that the thrust elements (7) are pushed on both sides by the spring caps (5) n to the axle bearing (8). Chassis according to claim 1, characterized in that a single steel compression spring with a progressive spring characteristic is provided instead of the spring assembly (4). Chassis according to claim 1, characterized in that the pressure elements (7) are coated with a high-load plastic.