CZ294372B6 - Frame of rail vehicle bogie designed in particular for freight wagons - Google Patents

Abstract

The present invention relates to a frame of a rail vehicle bogie designed in particular for freight wagons and consisting of I-section side beams connected by a box section bolster (2) and by channel section end beams (3), wherein the central upper plate (4) and the central lower plate (6) of the bolster (2) characterized by the same thickness go through web plates (14) of the side beams (1) while the changes in the thickness of extreme upper plates (5) and extreme lower plates (7) and of spacers (11) connecting them at their ends which are located in areas of low concentration of stresses are located on the inner side of the spacers (11), wherein the bolster (2) has its central upper plate (4) completed with extreme upper plates (5) and the central lower plate (6) completed with extreme lower plates (7). The central upper plate (4) and the central lower plate (6) being approximately 1.2 times thicker than the extreme upper plates (5) and than the extreme lower plates (7). Furthermore, the upper arm (10) of the spacer (11) is at least 1.3 times longer than the lower arm (12) thereof, whereas the lower arm (12) is at least equal to the length of the development of the curved part (13) of the spacer (11), whereby at least one of the arms (10, 12) of the spacer (11) is approximately 1.2 times thicker than the extreme upper plates (5) and extreme lower plates (7).

Description

Frame of railway bogie, especially for freight wagons

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway bogie frame, in particular for freight wagons, consisting of side beams formed of I-shaped sections connected by a cradle of a box section and U-shaped end beams. they pass through the webs of the lateral beams, while the thickness variations of the outer upper plates, outer lower plates and spacers joining them at the ends are on the inside of the spacers at low stress concentrations.

BACKGROUND OF THE INVENTION

Commonly known is a railway bogie frame consisting of two I-shaped side beams which are connected in the central part by a cradle of box cross section and by means of U-shaped profiles at both ends. The cradles of these frames have upper and lower flanges made of one piece of metal sheet, the webs not being divided, so that the parts of these beams are the same. The extremities of the upper and lower flanges are connected by spacers located in the transitions of the webs of the side beams, these joints being arranged in less stressed places. Chassis with such frames have been produced for many years and have been exhibited, for example at the International Fair in Poznan in 1996 and 1999, where, in addition to being directly exhibited, the brochure of the chassis manufacturer - Adtranz Pafawag Sp. z o.o. - The Y25 / Rssl Freight Wagon Bogie, containing illustrations and basic technical data. The design of these bogies was also published in an article by Edvard Gajewski and Andrzej Sosinski entitled The 3TNh / 03 (Y25Lsdl) and 3TNhb / 03 (Y25Lsdl / Rss) of the Freight Wagon Bogies, published in edition 1/2 of 1999 on pages 35-41 of the periodical. magazine Technika Transportu Szynowego.

Furthermore, a rail bogie frame is known in which the side beams attached to the cradle are provided with spacers located at the corners of the side beam uprights at the locations where the side beams are connected to the cradle, the spacers joining them to the upper and lower cradles of the cradle, and the at least one spacer arm has a thickness less than the thickness of the plate to which it is attached, the arm being 0.8 times thicker than the thickness of said plates. The solution is disclosed in French patent FR 2 801 021.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide the possibility of adapting known and used railway bogie frame designs to increased loads whilst maintaining the advantageous joining of side beams and cradles without significantly increasing the weight of the bogie frame.

In particular, the rail bogie frame for freight wagons, consisting of lateral beams formed of I-shaped profiles connected by a cradle of the box profile and the end beams of the U-shaped profiles, removes the above-mentioned disadvantages, and the central upper plate and the central lower plate of the cradle. having the same thickness, they pass through the webs of the side beams, while variations in the thickness of the outer top plates, outer bottom plates and spacers joining them at the ends are on the inner side of the spacers at low stress concentrations according to the invention. a central top plate supplemented with outer top plates and a central bottom plate with outer bottom plates, wherein the center top plate and center bottom plate are approximately 1.2 times thicker than the outer top plates and outer bottom plates and the upper arm of the spacer is however at least 1.3 times longer than her lower arm,

Wherein the length of the lower arm is at least equal to the length of the unfolded bent portion of the spacer, and at least one of the arms of the spacer is about 1.2 times greater than the thickness of the outer top and outer bottom plates.

According to the invention, it is advantageous if the cradle of the central vertical plate is connected to the outer vertical plates, which are about 1.2 times greater in thickness than the central vertical plates.

The advantage of the solution according to the invention is that it makes it possible to carry out modifications of the known and used frame designs of railway bogies of this type, allowing to increase their loading while maintaining their advantages - elasticity of joint between side beams and cradle.

BRIEF DESCRIPTION OF THE DRAWINGS

An exemplary embodiment of the invention is shown in the drawings, wherein FIG. 1 is a top view of the railcar frame, FIG. 2 a top view of the cradle, FIG. 3 a side view of a railcar frame, FIG. 4 detail A of FIG. Fig. 5 is a cross-sectional view of the cradle taken along the line AA in Fig. 2, Fig. 6 detail B in Fig. 2 joints of middle and outer vertical plates, Fig. 7 detail C in Fig. 5 joints of middle upper plate with outer upper plate and FIG. 8 detail D in FIG. 5 of the joint between the middle bottom plate and the extreme bottom cradle plate.

DETAILED DESCRIPTION OF THE INVENTION

The frame of the railway bogie according to the invention consists of two lateral I-beams 1 connected by a cradle 2 and a U-shaped end-beams 3. The cradle 2 is provided with a central upper plate 4, terminated by the outer upper plates 5. Z on the lower side, the cradle 2 is provided with a central bottom plate 6, which is terminated by the outer lower plates 7. The side walls of the cradle 2 are formed by a central vertical plate 8 followed by the outer vertical plates 9. The central upper plate 4 and the central lower plate 6 are approximately

1.2 times thicker than the outer top plates 5 and the outer bottom 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 10 of the spacer 11. of length l 1 while the outer lower plates 7 are connected to the lower arms of the spacer 11 of length a3. The upper arms 10 and lower arms 12 are connected by a bent portion of length a2. The spacer 11 has an upper arm 10 at least 1.3 times longer than the lower arm 12, the lower arm 12 being at least equal in length to the length of the unfolded bent portion 13, while one of the legs 10, 12 of the spacer 11 is approximately 1, 2 times thicker than the thickness of the outer top plates 5 and outer bottom plates 7. The thickness variations of the outer top plates 5 and outer bottom plates 7, as well as the spacers 11 joining them at their end portions, are found in areas of low stress Spacer sides JJ. The upper upper plates 5 and the lower lower plates 7 with spacers 11 are arranged in the web 14 of the side beam 1.

PATENT CLAIMS

Claims (3)

PATENT CLAIMS 1.2 times the thickness of the outer top plates (5) and outer bottom plates (7). ío A railway bogie frame according to claim 1, characterized in that the cradle (2) has central vertical plates (8) connected to the outer vertical plates (9), which are about 1.2 times greater in thickness than the central vertical plates (8). . A railway bogie frame, in particular for freight wagons, consisting of side beams (1) formed of I-shaped sections connected by a cradle (2) of a box section and end beams (3) of U-shaped sections, the central upper plate ( 4) and the central lower plate (6) of the cradle (2) having the same thickness pass through the webs (14) of the side beams (1), while the thickness variations of the outer upper plates (5), outer lower plates (7) and spacers (11) , There are on the inner side of the spacers (11) at points of low stress concentration at the ends of the spacers (11), characterized in that the cradle (2) has a central upper plate (4) supplemented with outer upper plates (5) and a central lower the top plate (6) is approximately 1.2 times thicker than the top 5 of the plate (5) and the bottom lower plate (7) and the upper arm (10) of the spacer (11) is at least 1.3 times longer than its lower leg (12), the length of the lower leg (12) being at least equal to the length of the unfolded bent portion (13) of the spacer (11) and at least one of the arms (10, 12) of the spacer (11) has about 3 drawings