RU231556U1 - BOSS BEAM OF A CARGO TROLLEY - Google Patents

Abstract

The utility model relates to railway transport and concerns the bogie of a freight car, in particular to the design of the bolster beams of freight bogies. The bolster beam of a cargo bogie in the form of a steel casting of box-shaped section comprises an upper chord 1 with a heel plate 2 having a supporting surface 3, and a thrust surface 4 on a flange 5 limiting the supporting surface along the perimeter 6, platforms 7 for sliders are made on the upper chord, the bolster beam also comprises a lower chord 8, side vertical walls 9. Horizontal sections 11 and 12 are made in the end parts of the bolster beam. At the same time, the supporting surface of the heel plate is located below the upper surfaces 22, 23 of the end horizontal sections, and the lower surfaces 24, 25 of the end horizontal sections and the lower surface 26 of the lower chord in the middle part are located at a distance (b) greater than the height (a) of the bolster beam at the end horizontal sections, but less than the height (c) of the bolster beam in the middle part. The utility model makes it possible to create a design for a bogie bolster of a railway car, ensuring optimally useful use of space limited by the upper and lower limits of the rolling stock clearance. 7 ref. f-ly, 2 ill.

Description

The utility model relates to railway transport and concerns the bogie of a freight car, in particular to the design of the bolster beams of freight bogies.

A known design of a freight bogie bolster is ["Drawings of Spare Parts for 1524mm Gauge Railway Cars", TRANSPORT Publishing House, Moscow, 1970, pp. 184-189], which is a steel casting of box-shaped section with dimensions in the middle part of 385 mm high (nominal size) and 280 mm wide (nominal size). The bolster consists of an upper chord with a maximum thickness of 25 mm (nominal size) and a lower chord with a maximum thickness of 25 mm (nominal size), connected to each other by vertical walls with a maximum thickness of 16 mm (nominal size). A thrust pad is made in the middle part of the upper chord, through which the thrust pad of the body rests on the bogie, while the supporting surface of the thrust pad is made horizontally and limited by a circular collar 25 mm high (nominal size) and 30 mm thick (nominal size). Also on the upper belt, between the thrust bearing and the end horizontal section, there are supports for the side bearings, and the section of the upper belt between the thrust bearing and the support of the side bearing has an inclination towards the support of the side bearing, the upper belt decreases in thickness towards the supports of the side bearing to 18 mm (nominal size). In addition, the supporting horizontal surface of the thrust bearing rises above the upper surface of the end horizontal section by a distance of 55 mm (nominal size). In the bolster on the end parts, recesses are made for placing friction wedges, there are support platforms for spring assemblies and an internal wall is made inside the bolster. For the strength of the thrust bearing, the unit is reinforced with a column in which a pallet is placed, which is a support for the kingpin. In the upper and lower belts, technological openings with flanges along the perimeter are made.

The disadvantage of this design is the elevation of the supporting horizontal surface of the thrust plate above the upper surface of the end horizontal section, which does not allow increasing the height of the car body sill to improve the strength qualities of the car undercarriage, and also does not allow increasing the volume of the body by increasing the height of the body when fitting it into the overall dimensions of the rolling stock (the overall dimensions have a limitation on height and width). At the same time, the support platforms for the spring sets do not have projections and limiters to prevent displacement of the outer and inner springs of the spring set.

A known design of a bolster beam with wear-resistant protection of the center plate [Patent for Utility Model of the Russian Federation No. 186657 published on 28.01.2019, 28.01.2019, Bulletin No. 4, B61F 5/50] in the form of a steel casting of a box-shaped section, containing an upper horizontal and lower belt connected by side walls. The beam has a center plate place, brackets for a dead center holder, technological holes, platforms for installing sliders, inclined surfaces for wedges. There are also support platforms for spring sets, each of which has protrusions to limit the movement of double-row springs. In the middle part of each support platform for a spring set, protrusions are made that limit the movement of the inner springs. In the direction of the center plate place and in the end part of the bolster beam, protrusions are made that limit the movement of the outer springs. In the middle part of each support platform for the spring set, there are projections that limit the movement of the outer springs. The projections are made in the form of cylinders or truncated cones, with at least two such elements located on the support platform for the spring set. At the same time, the projections are made in the form of polygonal prisms, or in the form of truncated polyhedral pyramids, with at least four such elements located on the support platform.

This design was chosen as a prototype for the claimed utility model.

In this design, the upper chord is made horizontal, which allows for a slight increase in the height of the carriage undercarriage or the height of the bolster beam to improve the strength qualities of the carriage; however, as in the analogue, the supporting horizontal surface of the bolster place rises above the upper surface of the end horizontal section of the bolster beam, which does not allow for the maximum use of the rolling stock dimensions.

The task, which the claimed utility model is aimed at solving, is the creation of a design for a bolster beam of a cargo bogie, ensuring optimally useful use of space, limited by the dimensions of the rolling stock at the upper and lower limits, in combination with ensuring the strength characteristics of the bolster beam.

The stated task in the claimed utility model is solved due to the fact that the supporting surface of the heel plate is located below the upper surfaces of the end horizontal sections. The lower surfaces of the end horizontal sections and the lower surface of the lower chord in the middle part are located at a distance greater than the height of the bolster on the end horizontal sections, but less than the height of the bolster in the middle part.

The essence of the claimed utility model is that the bolster beam of a cargo bogie in the form of a steel casting includes an upper chord containing a heel plate with a support surface and platforms for sliders, a lower chord, side vertical walls, while horizontal sections are made in the end parts of the bolster beam, along with this, the support surface of the heel plate is located below the upper surfaces of the end horizontal sections, and the lower surfaces of the end horizontal sections and the lower surface of the lower chord in the middle part are located at a distance greater than the height of the bolster beam at the end horizontal sections, but less than the height of the bolster beam in the middle part.

The supporting surface of the heel plate is located below the upper surfaces of the end horizontal sections at a distance in the range from 20 mm to 60 mm.

The lower surfaces of the end horizontal sections and the lower surface of the lower belt in the middle part are located at a distance in the range from 190 mm to 240 mm.

The height of the bolster beam at the end horizontal sections ranges from 145 mm to 175 mm.

The height of the bolster in the middle part ranges from 360 mm to 400 mm.

It is possible to manufacture a bolster beam in which the supporting surface of the heel plate is made conical.

It is possible to manufacture a bolster beam in which the supporting surface of the heel plate is made spherical, with a radius of 2000 mm.

The essence of the claimed utility model is explained by the figures:

Fig.1 - Bolster beam of the cargo trolley (main view);

Fig.2 - Bolster beam of the cargo trolley (view A).

The bolster beam of a freight bogie in the form of a steel casting of box-shaped section comprises an upper chord 1 with a thrust plate 2 having a support surface 3 (located horizontally) and a thrust surface 4 on a collar 5 limiting along the perimeter 6 of the support surface 3, platforms 7 for sliders are made on the upper chord, the bolster beam also comprises a lower chord 8, side vertical walls 9. In the area of the thrust plate 2, shelves 10 are made for fastening the dead center bracket. In the end parts of the bolster beam, horizontal sections 11 and 12 are made, as well as recesses 13 for placing friction wedges and collars 14 limiting the displacement of the outer springs, projections 15 limiting the displacement of the inner springs. In this case, an internal vertical wall 16 is made in each end part of the beam, and internal stiffening ribs 17 and a pallet 18 for supporting the kingpin are made in the middle part of the beam under the heel plate 2. Technological windows 19, 20 with flanges 21 along the perimeter are made in the upper 1 and lower 8 belts. In addition, the supporting surface 3 of the heel plate 2 is located below the upper surfaces 22, 23 of the end horizontal sections 11 and 12, and the lower surfaces 24, 25 of the end horizontal sections 11 and 12, and the lower surface 26 of the lower belt 8 in the middle part, are located at a distance (b) greater than the height (a) of the bolster beam at the end horizontal sections 11 and 12, but less than the height (c) of the bolster beam in the middle part.

The supporting surface 3 of the heel plate 2 is located below the upper surfaces 22, 23 of the end horizontal sections 11, 12 at a distance (d) in the range from 20 mm to 60 mm.

The lower surfaces 24, 25 of the end horizontal sections 11, 12 and the lower surface 26 of the lower belt 8 in the middle part are located at a distance (b) in the range from 190 mm to 240 mm.

The height (a) of the bolster beam at the end horizontal sections 11, 12 ranges from 145 mm to 175 mm.

The height (c) of the bolster in the middle portion ranges from 360 mm to 400 mm, and the width of the bolster in the middle portion ranges from 305 mm to 315 mm.

It is possible to manufacture a bolster beam in which the supporting surface 3 of the heel plate 2 is made conical.

It is possible to manufacture a bolster beam in which the supporting surface 3 of the heel plate 2 is made spherical, with a radius of 2000 mm.

The maximum thickness of the upper chord 1 in the bolster is 26 mm (nominal size), the maximum thickness of the lower chord 8 is 26 mm (nominal size), the maximum thickness of the vertical walls 9 is 15 mm (nominal size). The flange 5 of the heel plate 2 is 40 mm high (nominal size) and 40 mm thick (nominal size). Also, the section of the upper chord 1 between the heel plate 2 and the platform 7 for the side bearing has a slope towards the heel plate 2. These parameters are determined by calculation and ensure the strength of the bolster.

The technical result of the claimed utility model consists in creating a design of a bolster beam of a freight bogie, in which the supporting surface of the heel plate is located below the upper surfaces of the end horizontal sections, and the lower surfaces of the end horizontal sections and the lower surface of the lower chord in the middle part are located at a distance greater than the height of the bolster beam at the end horizontal sections, but less than the height of the bolster beam in the middle part, ensuring optimally useful use of the space limited by the overall dimensions of the rolling stock at the upper and lower limits, due to the fact that the body frame is located lower than that of a conventional car, that is, the height of the body between the car frame and, for example, the upper trim or roof, which are close to the upper boundary of the overall dimensions, increases, which leads to a maximum increase in the internal space of the body and increases the volume of the transported cargo.

In addition, the proposed utility model allows increasing the height of the frame, including the height of the center beam, which will increase the strength characteristics of the car frame and thereby ensure an increase in the load capacity of the car, which will increase the mass of the transported cargo.

The proposed design of the bolster also ensures the optimal approximation of the middle part of the lower chord to the lower boundary of the rolling stock clearance and is characterized by the expression (d)<(a)<(b)<(c).

To ensure the strength of the bolster beam of the cargo bogie, as well as to fit it into the overall dimensions, calculations were carried out, on the basis of which the optimal dimensions of several geometric parameters were determined:

the supporting surface of the heel plate is located below the upper surfaces of the end horizontal sections at a distance in the range from 20 mm to 60 mm;

the lower surfaces of the end horizontal sections and the lower surface of the lower belt in the middle part are located at a distance in the range from 190 mm to 240 mm;

the height of the bolster beam at the end horizontal sections ranges from 145 mm to 175 mm;

The height of the bolster in the middle part ranges from 360 mm to 400 mm.

The manufacture of a bolster beam in which the supporting surface of the center plate is made conical or in which the supporting surface of the center plate is made spherical, including with a radius of 2000 mm, ensures an even lower fit of the body frame on the bolster beam, while increasing the support area of the center plate of the car body frame on the supporting surface of the bolster beam, which reduces stress in the beam. For example, with a maximum bearing surface diameter of 312 mm, with a horizontal bearing surface, its area is 76415.04 mm ² , and if the bearing surface is formed in the form of a conical surface (the angle from the horizontal is 2.919°), then the bearing surface area is 77496.48 mm ² , while the body will lower by another 8 mm, which will increase the height of the body by 8 mm, and the area of the body center plate support on the bearing surface will increase by 1.42%, which increases the uniformity of the distribution of the arising loads and reduces stresses in the unit. If the bearing surface is made spherical (R = 2000 mm in the nominal size), then the area of the bearing surface is 100480.0 mm ² , while the body will also lower by 8 mm, increasing the height of the body by 8 mm, and the area of the body center plate support on the bearing surface will increase by 31.49%.

At present, design documentation has been developed for the declared design of the bolster beam.

Claims (8)

1. A bolster beam of a freight bogie in the form of a steel casting, including an upper chord containing a heel plate with a support surface and platforms for the sliders, a lower chord, side vertical walls, wherein horizontal sections are made in the end parts of the bolster beam, characterized in that the support surface of the heel plate is located below the upper surfaces of the end horizontal sections, and the lower surfaces of the end horizontal sections and the lower surface of the lower chord in the middle part are located at a distance greater than the height of the bolster beam at the end horizontal sections, but less than the height of the bolster beam in the middle part. 2. A bolster beam of a cargo trolley according to item 1, characterized in that the supporting surface of the heel plate is located below the upper surfaces of the end horizontal sections at a distance in the range from 20 mm to 60 mm. 3. A bolster beam of a cargo trolley according to item 1, characterized in that the lower surfaces of the end horizontal sections and the lower surface of the lower chord in the middle part are located at a distance in the range from 190 mm to 240 mm. 4. A bolster beam of a cargo bogie according to item 1, characterized in that the height of the bolster beam at the end horizontal sections is in the range from 145 mm to 175 mm. 5. A bolster beam of a cargo bogie according to item 1, characterized in that the height of the bolster beam in the middle part is in the range from 360 mm to 400 mm. 6. A bolster beam of a cargo bogie according to item 1, characterized in that the supporting surface of the heel plate is made conical. 7. A bolster beam of a cargo bogie according to item 1, characterized in that the supporting surface of the heel plate is spherical. 8. A bolster beam of a cargo trolley according to item 7, characterized in that the supporting surface of the heel plate is made spherical with a radius of 2000 mm.