RU2654649C2 - Solebar of the truck the rail freight car - Google Patents

Abstract

FIELD: rail vehicles.

SUBSTANCE: solebar of the truck of the rail freight car includes a horizontal arch bar interfaced with consoles forming pedestal openings, a lower horizontal member with a top shelf connected to the arch bar by means of vertical columns and diagonal tension members. Each diagonal tension member of variable cross-section is made of two vertical walls connected by a transverse angled wall. Transverse angled wall in the upper part is smoothly interfaced with the lower shelf of the horizontal section of the pedestal opening, and in the lower part - with the upper shelf of the lower member. Technological overlaps are made at the junctions of the transverse angled wall with the upper shelf of the lower member and with the lower shelf of the horizontal section of the pedestal opening.

EFFECT: increase in the reliability of the solebar is achieved.

1 cl, 3 dwg

Description

The invention relates to railway rolling stock, in particular to the design of a molded side frame of a trolley of a freight railway car.

There are various designs of the side frames of the freight car truck, which are made in the form of steel casting (patents: RU 76879 U1, B61F 5/00, 10/10/2008; RU 2380256 C2, B61F 5/52, 01/27/2010), containing the upper horizontal belt with consoles forming axle openings, the lower belt with a support platform for the spring kit, two inclined belts that match the upper and lower belts, vertical columns, the central spring aperture. In each of the given side frames, the inner radius transition from the lower wall of the upper horizontal belt to the inclined belt is made by one radius with the transition to the axle box jaw and the inclined belt.

In these designs, attempts have been made to increase the strength of the frame in the mating zone of the lower wall of the upper belt with an inclined belt. In this zone, the most frequent cases of frame failure associated with exceeding the permissible stresses during the operation of the car. In the aforementioned technical solutions, various reinforcements of this zone are provided by installing internal stiffeners, external stiffeners, and the implementation of a support platform with longitudinal reinforcing ribs. However, stresses in these zones remain high enough and cause cracking.

Closest to the proposed invention is the technical solution according to patent RU 102577 U1, B61F 5/52, 11/26/2012 (adopted as a prototype), in which the side frame of the freight car truck, made in the form of a steel casting, includes upper and lower horizontal belts connected interconnected by vertical columns, forming, together with horizontal belts, a spring aperture, in the lower part of which there is a supporting surface, of inclined belts conjugated with the lower belt and horizontal supporting sections of the jaw openings, boiling external and internal support stops. The upper horizontal belt in the area of the viewing window is made in the form of a closed box section with the lower shelf and the upper shelf of the inclined belt, the latter being paired with the upper shelf of the lower belt at an angle to the horizontal, and the cross section of the inner jaw guide is open from the side of the inclined belt. In addition, technological holes are made in the upper shelf of the inclined belt.

The disadvantage of this design of the side frame is the inability to inspect the surface of the inner corner of the jaw opening, the most loaded during the operation of the car, to identify casting defects.

The technical problem to which the invention is directed is to increase the reliability of the side frame and the safety factor of fatigue resistance.

The technical result is achieved by the fact that in the side frame of the truck of a freight railroad car, including an upper horizontal belt mated with consoles forming jaw openings, a lower horizontal belt with an upper shelf connected to the upper belt by means of vertical columns and inclined belts, each inclined belt variable cross-section is made of two vertical walls connected by a transverse inclined wall, and the transverse inclined wall in the upper part smoothly with harnessed with the lower shelf of the horizontal section of the jaw opening, and in the lower part with the upper shelf of the lower belt, while technological joints were made at the junction of the transverse inclined wall with the upper shelf of the lower belt and the lower shelf of the horizontal section of the jaw opening.

Comparison of the proposed technical solution with the given analogues and prototype allowed us to establish the presence of distinctive features, therefore, this technical solution meets the criterion of "novelty."

The essence of the invention is illustrated by drawings, where:

in FIG. 1 shows a side frame in plan;

in FIG. 2 shows a general view of the side frame;

in FIG. 3 shows a section through the inclined belt of the side frame in the middle part along line AA in FIG. 2.

The side frame of the truck of a freight railroad car includes an upper horizontal belt 1 conjugated with consoles 2 forming jaw openings 3, a lower horizontal belt 4 with an upper shelf 5 connected to the upper belt 1 by means of vertical columns 6 and inclined belts 7, with each inclined belt 7 has a variable cross section and is made of two vertical walls 8 connected to each other by a transverse inclined wall 9, and the transverse inclined wall 9 in the upper part smoothly interfaced with the lower shelf of the zone 10 of the jaw opening 3, and in the lower part - with the upper shelf of the lower belt 5. In order to eliminate shrinkage shells and friability that occurs during casting of the side frame, at the junction of the transverse inclined wall 9 with the upper shelf of the lower belt 5 and the lower shelf horizontal section 10 of the jaw opening 3 made technological laps 11.

The implementation of the inclined belt 7 of the side frame consisting of two vertical walls 8, interconnected by a transverse inclined wall 9, which in the upper part is smoothly interfaced with the lower horizontal shelf 10 of the axle box 3, and in the lower part - with the upper shelf 5 of the lower belt 4, allows , as calculations showed, reduce stresses in the areas where stress concentrators are located, where the most frequent cases of frame failure, and, as a result, the strength and reliability of the side frame of the freight wagon trolley during operation.

Currently, the inventive design has developed a preliminary design and strength calculations.

Claims (1)

Side frame of a freight railroad car truck, including an upper horizontal belt mated to consoles forming jaw openings, a lower horizontal belt with an upper shelf connected to the upper belt by means of vertical columns and inclined belts, characterized in that each inclined belt of variable section is made of two vertical walls interconnected by a transverse inclined wall, and the transverse inclined wall in the upper part is smoothly interfaced with the lower shelf of the horizontal stka jaw opening, and the lower part - with an upper flange of the lower belt, and in the joints of the transverse inclined wall with an upper flange and a bottom flange bottom leg of the horizontal portion of the jaw aperture formed technological overlaps.

Images