SK16032002A3 - Rail vehicle bogie frame designed in particular for freight wagons - Google Patents

Abstract

The invention solves the problem of adjusting bogie frames to increased loads maintaining the flexibility of the connection between the side beam and the bolster without any significant increase in weight. The bolster (2) has a central upper plate (4) finished with extreme lower plates (7). The central upper plate (4) and the central lower plate (6) are approximately 1.2 times thicker than the extreme upper plates (5) and than the extreme lower plates (7), and additionally the spacer (11) has its upper arm (10) at least 1.3 times longer than the lower arm (12), which is at least equal to the development of its curved part (13), whereby one of the arms (10,12) is approximately 1.2 times thicker than extreme upper plates (5) and than extreme lower plates (7). The bolster (2) has central vertical plates (8) connected to the extreme vertical plates (9); approximately 1.2 times than the central vertical plates (8).

Description

Technical field

The present invention relates to a chassis frame of a rail vehicle designed especially for freight wagons.

BACKGROUND OF THE INVENTION

Widely known is a frame in which two side beams with an I-shaped cross-section are connected by a cradle of the box-shaped undercarriage in the central part and by the end beams of the U-profile at both ends. The cradles of such frames have upper and lower flanges made of one sheet metal and the wall plates are not divided, therefore the parts of these beams are the same. The extremities of the upper flanges and lower flanges are connected by spacers located in the passages of the side beam wall plates, these connections being in places that are not highly stressed by fatigue. Chassis with such frames have been manufactured for many years and have been exhibited, for example, at the Poznań International Fair between 1996 and 1999, where, in addition to their physical presence, the brochures of the manufacturer of such chassis Adtranz Pafawag Sp. z o. about. - The Y25 / Rss1 Freight Wagon Bogie, which included illustrations and basic technical data. The construction of these chassis is also given in the article by Edward Gajewski and Andrzej Sosiński entitled The 3TNh / 03 (Y25Lsd1) and 3TNhb / 03 (Y25Lsd1 / Rss) Freight Wagon Bogies (Chassis 3TNh / 03 (Y25Lsd1) and 3TNhb / 03 (Y25Lsd1) Rss (freight wagons), published in issue 1/2 of 1999 on p. 38-41 of Technika Transportu Szynowego.

A known solution is also a bogie frame in which the side beams have recesses at the corners where they are connected to the cradles, recessed in the corners of the side beams of the side beams, which spacings connect it to the upper and lower flange of the cradle. at least one of the struts less thick than the plate to which the strut is attached; the arm is 0.8 times thicker than / 605-0 y

-2the mentioned boards. This solution is disclosed in the French patent application no. 9,914,443th

It is an object of the present invention to adapt known and operated bogie frame structures to higher loads, while at the same time retaining the advantage of a flexible connection between side beams and cradles in a convenient manner without significantly increasing the weight of the bogie frame.

SUMMARY OF THE INVENTION

The essence of the invention is a chassis frame of a rail vehicle in which the cradle has its central upper plate terminated by the extreme upper plates and the central lower plate terminated by the extreme lower plates. The center top plate and center bottom plate are 1.2 times thicker than the outer top plates and the outer bottom plates. The strut has its upper arm at least 1.3 times longer than the lower arm; and the lower arm is at least equal to the length of the curved portion thereof, wherein at least one of the struts is approximately 1.2 times thicker than the extreme upper plates and than the extreme lower parts. According to a further feature of the invention, the central vertical plates are cradled to the extreme upper plates, as a result of which the extreme vertical plates are approximately 1.2 times thicker than the central vertical plates.

The advantage of the construction according to the invention is the possibility of adapting the known and operated bogie frame constructions to increased loads, while retaining their advantage - the flexibility of the connection between the side beams and the cradle - an advantageous fact which does not significantly increase the bogie weight.

BRIEF DESCRIPTION OF THE DRAWINGS

In FIG. 1 is a top view of the bogie frame, FIG. 2 is a top view of the cradle; FIG. 3 is a side view of the bogie frame, and FIG. 4 is a detail A of the spacing connection, while FIG. 5 is a section A - A of the cradle; FIG. 6 shows a detail B of the connection of the central and outer vertical plates, FIG. 7 is a detail C of the center top connection

-3plate with extreme top plate, fig. 8 is a detail D of the connection of the middle bottom plate to the extreme bottom plate of the cradle.

DETAILED DESCRIPTION OF THE INVENTION

The bogie frame according to the invention consists of two side beams 1 with a cross-section of I shape, connected by a cradle 2 of a box cross-section and end beams 3 of a U-profile. The cradle 2 has its central upper plate 4 terminated by the extreme upper plates 5, and its central lower plate 6, terminated by the extreme lower plates 7, while the central vertical plate 8 is connected to the extreme vertical plates 9. The central upper plate 4 and the central lower plate 6 is approximately 1.2 times thicker than the outer upper plates 5 and than the outer lower plates 7, while the outer vertical plates 9 are approximately 1.2 times thicker than the central vertical plates 8. The outer upper plates 5 are connected to the upper arms The upper legs 10 and the lower legs 12 are connected by a curved portion 13. The spacer 11 has the upper arm 10 at least 1.3 times longer than the lower arm 12, while the upper legs 10 and the lower legs 12 are connected by a curved portion. wherein the lower arm 12 is at least equal to the length of its curved portion 13, as a result of which one of the arms of the span 11 is approximately 1.2 times thicker than the extreme upper These plates vary in thicknesses of the outer top plates 5 and outer bottom plates 7, as well as the spacers 11 which connect them at the ends, are located in areas of low stress concentration on the inside of the spacers H. 5 and the lower bottom plates 7 together with the spacers 11 are located in the wall plate 14 of the side beam 1.

Claims (2)

PATENT CLAIMS 1. A bogie frame designed especially for freight wagons, comprising I-shaped side beams connected by a box-type cradle and U-shaped end beams, characterized in that the upper and lower plates of the cradle of equal thickness extend through the side beam wall plates, while the variations in the thickness of the bottom plates and the top plates and the spacers joining them at the ends located in the low stress concentration areas are located on the inside of the spacers, the cradle (2) having a central top plate (4), ending with extreme top plates (5), and a middle bottom plate (6) topped with extreme bottom plates (7), the middle top plate (4) and the middle bottom plate (6) are approximately 1.2 times thicker than outermost plates (5) and than outermost plates (7); the upper arm (10) of the strut (11) is at least 1.3 times longer than the lower arm (12), while the lower arm (12) is at least equal to the length of the curved portion (13), at least one of the struts ( 11) approximately 1.2 times thicker than the outer top plates (5) and outer bottom plates (7). Chassis frame according to claim 1, characterized in that the cradle (2) has central vertical plates (8) connected to the extreme vertical plates (9); wherein the outer vertical plates (9) are approximately 1.2 times thicker than the central vertical plates (8).