RU209732U1 - Two-axle bogie of a freight car - Google Patents

Abstract

The utility model relates to railway transport, namely to two-axle freight car bogies designed to be installed under freight cars of mainline railways. The technical result, the solution of which is directed by the utility model, is to increase the reliability of the trolley by increasing the reliability of fastening of side bearings, while ensuring the optimal metal content of the product. This result is achieved by the fact that the two-axle freight car bogie contains two side frames, a bolster with two permanent contact bearings, two wheelsets, two spring sets. Permanent contact bearings are installed on the support platforms of the bolster. The bearing platform level is below the bearing surface level of the thrust bearing. In the place of the bolted connection of the beam with each side bearing, the bolster contains two protrusions for the installation of nuts, while the height of the protrusions is 2-15 mm. 7 w.p. f-ly, 5 ill.

Description

The utility model relates to railway transport, namely to two-axle freight car bogies designed for installation under freight cars of mainline railways.

The two-axle freight car bogie contains wheel pairs with axlebox assemblies that take the load from the bogie frame, which includes a bolster supported on spring sets located in the central openings of the side frames with axlebox jaws made with technological holes, and adapters located in the axlebox openings.

The bolster serves to transfer the load to the spring sets and is a box-section casting with a thrust bearing cast at the same time and platforms for fastening clearance-free bearings. The center pad serves as a support for the car center plate. On the support pads of the bolster there are fixed-contact side bearings fastened with bolts.

The permanent contact bearing is designed to dampen lateral vibrations of the car body, limit bogie wobble and increase the stability of the car.

Known beam bolster railroad bogie in the form of a steel casting box-section, consisting of the upper belt, which includes an annular thrust plate with a shoulder and a system of longitudinal and transverse reinforcing ribs, side vertical walls with technological holes, as well as the lower belt with internal longitudinal ribs located symmetrically to the central longitudinal axis of the beam, and reinforced from the side of the thrust bearing in its end internal cavity by a vertical rib with a smooth transition into the inclined element of the lower chord and into the inclined element of the upper chord, the horizontal end part of which is located below the level of the support platform for the bearings and is associated with it with the help of radius transition (RU No. 2565642, IPC B61F 5/00, publ. 20.10.2015).

The disadvantage of this technical solution is the lack of reliability of fastening of bearings.

The closest analogue is the bolster of a freight car bogie, in which the level of the bearing pads of the side bearings is lower than the level of the bearing surface of the thrust bearing by the value L, the bearing pads for the bearings are rectangular in shape with rounded protrusions in the middle part, oval holes are made under the bearing pads in the side walls. forms having walls reinforced inside the beam, in the end parts of the bolster there are pockets for friction wedges, the inclined surfaces of the pockets have protrusions above the upper chord, on the side walls on the outer and inner sides of the pocket there are transverse stops, between the pocket and the internal transverse stop on vertical on the side walls there are flat thrust pads (RU No. 104523, IPC B61F 5/52, publ. 20.05.2011).

The disadvantage of the closest analogue is the lack of reliability of fastening of bearings.

The technical problem solved by the utility model is the insufficient reliability of the fastening of the side bearings.

The technical result, the solution of which is directed by the utility model, is to increase the reliability of the trolley by increasing the reliability of fastening the side bearings.

This result is achieved by the fact that the two-axle freight car bogie contains two side frames, a bolster with two permanent contact bearings, two wheelsets, two spring sets. Permanent contact bearings are installed on the support platforms of the bolster. The bearing platform level is below the bearing surface level of the thrust bearing. The bolster contains protrusions for the installation of nuts of the bolted connection of the beam with the side bearing, while the height of the protrusion is 2-15 mm. To increase the rigidity, radius transitions are made at the base of the bearing platform.

The width of the support platform for the installation of the side bearing can be 130-230 mm.

The length of the support platform for the installation of the side bearing can be 250-330 mm.

The protrusions for the installation of bolted nuts can be rounded.

The diameter of the protrusion for the installation of bolted nuts can be 45-65 mm.

The distance between the extreme points of the protrusions for the installation of nuts for the bolted connection of the beam with the bearing can be, for example, 260-280 mm.

The distance between the level of the bearing pad and the level of the bearing surface of the thrust bearing can be 10-35 mm.

The features of the utility model are:

1 - two-axle bogie of a freight car

2 - containing two side frames,

3 - bolster with two side bearings of constant contact,

4 - two wheelsets, two spring sets,

5 - bearings of constant contact are installed on the support platforms of the bolster,

6 - the level of the bearing platform of the side bearing below the level of the bearing surface of the thrust bearing,

7 - the bolster contains protrusions for the installation of nuts for bolted connections of the beam with side bearings,

8 - while the height of the protrusion is 2-15 mm,

9 - to increase the rigidity at the base of the bearing platform, radius transitions are made,

10 - the size of the side bearing can be 120-135 mm after the installation of the car.

11 - the width of the support platform for the installation of the side bearing can be 130-230 mm,

12 - the length of the support platform for the installation of the side bearing can be 250-330 mm,

13 - the diameter of the protrusion can be 45-65 mm,

14 - the distance between the extreme points of the protrusions for the installation of nuts for the bolted connection of the beam with the bearing can be 260-280 mm,

15 - the distance between the level of the bearing platform and the level of the bearing surface of the thrust bearing can be 10-35 mm.

Features 1-6, 9 are common with the prototype, features 7-8, 10-15 are the hallmarks of the utility model.

The utility model is illustrated by drawings.

In FIG. 1 shows a general view of the trolley (assembly); fig. 2 shows a general view of the trolley (disassembled); in fig. 3 shows a general view of the bolster; in fig. 4, 5 - a section of the bolster with a platform for attaching side bearings.

Designations on the drawings:

1 - side frame,

2 - bolster,

3 - wheelset,

4 - spring suspension,

5 - permanent contact bearing,

6 - bearing surface of the thrust bearing,

7 - base bearing platform,

8 - ledge for the installation of bolted nuts,

9 - through holes for installing a bolted connection,

L1 - bearing size,

L2 - the width of the support platform for the installation of the side bearing,

L3 - the distance between the level of the bearing platform and the level of the bearing surface of the thrust bearing,

L4 - height of the protrusion for the installation of bolted nuts,

L5 - the distance between the extreme points of the protrusions 8 for the installation of bolted nuts,

R1 - radial transition from the support platform for the installation of the side bearing to the bearing area of the bolster,

R2, R3 - radial transitions from the support platform for the installation of the bearing to the end zone of the bolster.

D1 - diameter of the protrusion for the installation of the bolted nut.

The bogie (Fig. 1, 2) contains two side frames 1, a bolster 2 with two permanent contact bearings 5, two wheelsets 3, two spring sets 4.

Bearings of constant contact 5 are installed on the bearing platforms 7 of the bolster 2. The level of the bearing platform 7 of the bearing 5 is lower than the level of the bearing surface of the thrust bearing 6 at a distance L3 (Fig. 3, 4).

In the place of the bolted connection of the beam 2 with each side bearing 5, on the side of the nuts, the bolster 2 contains two protrusions 8 for the installation of nuts of the bolted connection, while the height L4 of each protrusion 8 is 2-15 mm, the diameter of the holes 9 for the bolted connection is selected according to the characteristics sliders (Fig. 4). The distance L5 between the extreme points of the protrusions 8 for the installation of bolted nuts and the diameter D1 (Fig. 5) of the protrusions 8 for the installation of the nut is selected according to the characteristics of the bearings.

The presence of protrusions 8 makes it possible to increase the reliability of the bolted connection of the bearings 5 and the bolster 2, which increases the reliability of the bogie as a whole, while ensuring the optimal metal consumption of the product.

The protrusions 8 for the installation of bolted nuts can be rounded. This form provides maximum rigidity of the attachment point. At the same time, due to the rounded shape, the optimal metal consumption of the product is ensured.

Radius transitions R1, R2, R3 are made at the base of the bearing platform 7 of the bearing 5 to increase rigidity. R1 - radial transition from the support platform for the installation of the side bearing to the bearing area of the bolster, R2, R3 - radius transitions from the support platform for the installation of the side bearing to the end zone of the bolster.

The dimension L1 of the side bearing, for example, may be 120-135 mm after the carriage has been installed. The width of the support platform L2 for the installation of the side bearing can be, for example, 130-230 mm. The length of the support platform L2 for the installation of the side bearing can be, for example, 250-330 mm.

The diameter D1 of the protrusions 8 for installing the nut can be 45-65 mm. This width provides reliable fastening of the bolted connection, a width of more than 65 mm increases the metal consumption and at the same time does not increase reliability, a width of less than 45 mm will not provide reliable fastening of the bolted connection.

The distance L5 between the extreme points of the protrusions 8 for the installation of bolted nuts can be, for example, 260-280 mm. This distance provides reliable fastening of the bolted connection, a distance of more than 280 mm increases the metal consumption and at the same time does not increase reliability, a distance of less than 260 mm will not ensure reliable fastening of the bolted connection.

The distance L3 between the level of the bearing platform 7 of the bearing 5 and the level of the bearing surface of the thrust bearing 6 can be, for example, 10-35 mm.

In a specific implementation example, the maximum size L1 of the side bearing was 130 mm after the car was installed; M24 bolts were used to fasten the side bearings.

When operating freight cars on mainline railways, one of the most important issues is the reliability of freight car bogies.

In the proposed utility model, in the manufacture of two-axle freight car bogies, the reliability of fastening the side bearings is increased.

Compared with the well-known technical solution adopted as a prototype, the proposed solution allows you to create a reliable design of a two-axle bogie using a reliable fastening of bearings on the bolster.

Claims (8)

1. A two-axle freight car bogie containing a bolster with two side bearings of constant contact, in the place of the bolted connection of the beam with each side bearing, the bolster contains protrusions for installing nuts, characterized in that the diameter of the protrusion for installing nuts of the bolted connection is 45-65 mm, and the distance between the extreme points of the protrusions for the installation of bolted nuts is 260-280 mm. 2. A two-axle freight car bogie according to claim 1, characterized in that in the place of the bolted connection of the beam with each bearing, the bolster contains two protrusions for installing nuts, while the height of the protrusions is 2-15 mm. 3. A two-axle freight car trolley according to claim 1, characterized in that the protrusions for the installation of bolted nuts are rounded. 4. A two-axle freight car bogie according to claim 1, characterized in that radial transitions are made at the base of the bearing platform. 5. A two-axle freight car bogie according to claim 1, characterized in that the bearing size is 120-135 mm. 6. A two-axle freight car bogie according to claim 1, characterized in that the width of the support platform for the installation of the side bearing is 130-230 mm. 7. A two-axle freight car bogie according to claim 1, characterized in that the level of the supporting platform of the bearing is lower than the level of the bearing surface of the thrust bearing. 8. A two-axle freight car bogie according to claim 7, characterized in that the distance between the level of the bearing platform and the level of the bearing surface of the thrust bearing is 10-35 mm.

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