RU205114U1 - DRESSING BEAM OF FREIGHT CAR BARROW - Google Patents

Abstract

The claimed utility model relates to railway transport and concerns parts of two-axle bogies of freight cars. The problem posed in the utility model is solved in the construction of a bogie bogie beam of a freight car, which consists of an upper and a lower chord connected by side walls, which has on the upper chord in the central part a center point with a hole in the middle and a support column made in the form of a cross formed by the intersection of the longitudinal and transverse vertical ribs, characterized in that the transverse rib of the support column is made with a smooth transition with a radius R1, ranging from 30 mm to 200 mm, to the outer upper edges of the ribs of the lower chord.

Description

The claimed utility model relates to railway transport and concerns parts of two-axle bogies of freight cars.

In freight railway transport, three-piece bogies with a central spring suspension are widely used as running gears for cars, the frame of which consists of a bolster containing an upper belt with a bearing seat and two side frames resting on the bearing assemblies of wheelsets.

Such structures include, for example, the MotionControl M-976 TruckSystem (USA), QCZ56 (China) ICF and MD 45/52 (Germany), 18-100, 18-131, 18-578, 18-597 (Russia) and 18 -7020, 18-755, 18-781, 18-4129 (Ukraine), etc. Simple in design and maintenance, three-piece bogies have a number of characteristic drawbacks. So, for example, in the bogie beams of bogies for cars, the bearing zone and the transition zones of the main body of the beam, which has the shape of a bar of "equal resistance to bending", into the end parts containing pockets for wedges of frictional vibration dampers and bearing surfaces on the springs of the central spring suspension.

All known technical solutions boil down to the fact that the bolster is a thin-walled box-type structure, in the vertical plane close in shape to a bar of equal bending resistance. The end parts of the bottom are equipped with devices for fixing the springs of the central spring suspension, on which it rests, and there are recesses in the side walls - pockets for placing the wedges of the frictional vibration dampers. Various options are offered for the internal placement of elements that reinforce the center bearing zone of the beam, the transition zone to the end parts and the bearing platforms of the side beams. Much attention is paid to the protection of the rubbing surfaces of the bearing zone and the inclined surfaces of the pockets for frictional vibration dampers. However, the operation of bolster beams as part of three-piece bogies of freight cars, with all the variety of known technical solutions, does not guarantee high operational reliability during the assigned service life.

The design of the bogie bolster is known ("Drawings of spare parts for railroad cars with a track gauge of 1524 mm. Running gear, shock devices and shock absorbers of transition platforms", publishing house "Transport", Moscow, 1970, p. 179), consisting of the lower and upper belts connected side walls, having a bearing seat, technological openings, platforms for installing sideways, inclined surfaces for wedges, support platforms for spring sets, containing on the lower chord stoppers for the outer and inner springs of the spring set, while stoppers for the outer springs are made only on the inner side bolster, relative to the center point.

The disadvantage of this bolster is its reduced strength and rigidity, due to the absence of additional cross-section reinforcing load-bearing elements, the presence of four oval-shaped technological holes in the upper chord, the mutual conjugation of the structural elements of the bolster, in particular the dead center bracket.

This design is selected as a prototype for the claimed utility model.

The technical task of the utility model is to improve the reliability in operation of the bolster of a freight car bogie.

The main technical result to be achieved by the utility model is to increase the strength and fatigue characteristics of the bolster of a freight car bogie. In the claimed utility model, this problem is solved due to the combination of the following essential features.

The bolster beam of a freight car bogie (Fig. 1) is a box-section casting (Fig. 2), which contains the upper 1 and lower 2 chords, connected by side walls 3, on the upper chord in the central part there is a center-bearing place with a flat supporting surface 4, an annular stop collar 5, a hole 6 in the middle and a support column 7. The support column 7 (Fig. 3) is located along the central vertical axis of the beam on the lower belt between the ribs 8 and is made in the form of a cross formed by the intersection of the longitudinal and transverse vertical ribs, and the transverse the rib of the support column is made with a smooth transition with a radius of R1, ranging from 30 to 200 mm, to the outer upper edges of the ribs of the lower chord 8.

The above design features of the bolster can be applied in bogies of biaxial type 2 in accordance with GOST 9246-2013, intended for freight cars of 1520 mm track gauge railways with a maximum static axle load of 230 kN and a design speed of 120 km / h.

Brief Description of Drawings

FIG. 1 is an isometric view of the bolster of a freight car bogie

FIG. 2 - the main view of the bolster of a freight car bogie, combined with a half section.

FIG. 3 is a view along section A-A in FIG. 2.

Claims (1)

A bolster beam of a freight car bogie, consisting of an upper and a lower chord connected by side walls, having on the upper chord in the central part a thrust bearing with an opening in the middle and a support column made in the form of a cross formed by the intersection of longitudinal and transverse vertical ribs, characterized by the fact that that the transverse edge of the support column is made with a smooth transition with a radius of R1, ranging from 30 mm to 200 mm, to the outer upper edges of the ribs of the lower chord.

Images