RU201176U1 - ELASTIC INSERTION OF THE BUCKET ASSEMBLY OF THE FREIGHT CAR BARROW - Google Patents

Abstract

The utility model relates to railway transport and can be used in axleboxes of bogies of freight railway cars to transfer the load from the side frames of the bogies through bearings on the axles of wheelsets. The elastic insert contains rigid plates (1) and elastic plates (2) of thickness h located between them. The elastic plates (2) are recessed relative to the end surfaces of the rigid plates (1) and are made with end surfaces having a concave shape with recesses (3) of depth w. The ratio of the thickness h of the elastic plates (2) to the width w of the recesses (3) is from 4.0 to 10.0. EFFECT: increased operational reliability and durability of the elastic insert. 6 h. p. f-ly, 3 ill.

Description

The utility model relates to railway transport and can be used in axleboxes of bogies of freight railway cars to transfer the load from the side frames of bogies through bearings on the axles of wheelsets.

Known elastic insert of the bearing adapter of a railway freight car, containing an elastomer body having an upper elastomeric surface for interaction with the supporting surface of the side frame of the bogie and a lower elastomeric surface that receives the load from the adapter surface, as well as an elongated rigid plate located inside the elastomer body and connected with this body (see US 3699897 A, publ. 10.24.1972).

The constructive implementation of the known elastic insert, in which the rigid plate is inside the housing, and the load is taken by the elements made of elastomer, in contact with the support surfaces of the side frame and the adapter, can help to reduce the service life of the elastic insert.

Known elastic insert of the axle box unit of a two-axle bogie of a freight car, consisting of alternating layers of elastic material and metal plates with two supporting surfaces for interaction with the side frame of the bogie and with an adapter of the axle box unit, while the end surfaces of the elastic material and metal plates of the elastic insert are in one common plane (see RU 2275308 C2, publ. 27.04.2006).

In the known elastic insert, there is a possibility of separation of the layers from each other in the zones of the end surfaces under the influence of the operating load, followed by the extrusion of the elastic material from the space between the metal plates, which is due to the execution of the end surfaces of all layers of the elastic insert in the same plane.

The technical problem of the known elastic inserts is their insufficient service life.

The technical result achieved with the use of the utility model consists in increasing the operational reliability and durability of the elastic insert of the axle box unit of the bogie of a freight railway car.

The specified technical result is achieved due to the fact that in the elastic insert of the axle box unit of the freight car bogie, which contains rigid plates and elastic plates located between the rigid plates and connected to them, while the outer rigid plates are made with working surfaces that correspond in shape to the working surfaces the side frame of the bogie and the adapter of the axle box unit, according to the utility model, it is proposed that the end surfaces of the elastic plates be made of a concave shape with recesses, while the ratio of the thickness of the elastic plates to the width of the recesses is from 4.0 to 10.0.

In a preferred form of implementation of the utility model, elastic plates are located with their end surfaces relative to the end surfaces of rigid plates at a distance of at least 3 mm.

In the preferred form of the implementation of the utility model, the end surfaces of the elastic plates are made of a concave shape with recesses along the entire perimeter of the elastic insert.

In special cases, the implementation of the groove is made cylindrical or spherical.

In a preferred embodiment of the utility model, the rigid plates are made of metal.

In a preferred embodiment of the invention, the elastic plates are made of polyurethane elastomer.

Due to the design of the end surfaces of the elastic plates of a concave shape, with recesses, the likelihood of extrusion of the elastomeric material from the space between the rigid plates under the influence of a vertical load, which causes periodic deformations of the elastomeric material, is reduced, which causes subsequent delamination and destruction of the elastic insert.

To increase the operational reliability and durability of the elastic insert, the elastic plates are recessed relative to the end surfaces of the rigid plates at a distance of at least 3 mm; in addition, the recesses of the end surfaces of the elastic plates are made along the entire perimeter of the elastic insert, on each of its sides.

The location of the end surfaces of the elastic plates relative to the end surfaces of the rigid plates at a distance of less than 3 mm can lead to the extrusion of the elastic material from the space between the metal plates under load.

The proposed ratio of the thickness h of the elastic plate and the width w of the recess is the most optimal. Implementation of the ratio h / w less than 4.0 is limited by the technology of manufacturing the elastic insert; when the h / w ratio is more than 10.0, the end surfaces of the elastic plates under the action of the load from the concave state can go into the convex state with further extrusion of the elastomeric material and its peeling.

The utility model is illustrated by drawings, which show:

in fig. 1 - elastic insert, main view with a local cut;

in fig. 2 - elastic insert, view A in FIG. one;

in fig. 3 is a diagram of the arrangement of the elastic insert in the axle box of the freight car bogie.

The proposed elastic insert contains (Fig. 1) rigid plates 1.1, 1.2, 1.3 and located between the rigid plates 1 elastic plates 2.1, 2.2 of thickness h. Rigid 1 and elastic 2 plates are interconnected by means of, for example, an adhesive bond.

The rigid plates 1 are preferably made of metal. A polyurethane elastomer can be used as a material for the production of elastic plates 2.

Elastic plates 2 along the entire perimeter of the elastic insert are made with end surfaces having a concave shape with grooves 3 of depth w (Fig. 2). Depressions 3 can be cylindrical or spherical in cross section. The thickness h of the elastic plates 2 and the depth w of the recesses 3 are related to each other in the range of values from 4.0 to 10.0. The elastic plates 2 are located with their end surfaces relative to the end surfaces of the rigid plates (1) at a distance S, which must be at least 3 mm.

In a specific embodiment, the elastic insert contains three rigid plates 1.1, 1.2, 1.3 and two elastic plates 2.1, 2.2. In this case, the outer surfaces of the outer rigid plates 1 1.1 and 1.3 are working and are made in the shape of the reciprocal contacting with them in the assembly of the axle box unit with the working surfaces of the side frame 4 of the bogie and the adapter 5 of the axle box unit (Fig. 3). Each of the elastic plates 2 is made with a thickness h of 11 mm. The depth w of the recesses 3 is 1.6 mm. The h / w ratio is 6.8.

When a freight car moves along curved track sections, an elastic insert, as a damping element of the axle box unit of the bogie, reduces shock loads from the side frames on the axles of the wheel pairs and creates spatial elastic connections between the bogie elements due to layers of elastic plates 2. Rigid plates 1 enhance the bearing capacity elastic insert without affecting its elastic deformation. An elastic insert with elastic plates 2, which have recesses along their end surfaces, has increased operational reliability and service life.

Claims (7)

1. Elastic insert of the axle box unit of the freight car bogie, containing rigid plates and elastic plates located between the rigid plates and connected to them, while the outer rigid plates are made with working surfaces matching in shape to the working surfaces of the side frame of the bogie and the adapter of the axle box unit, which is different the fact that the end surfaces of the elastic plates are made of concave shape with recesses, while the ratio of the thickness of the elastic plates to the width of the recesses is from 4.0 to 10.0. 2. An elastic insert according to claim 1, characterized in that the elastic plates are located with their end surfaces relative to the end surfaces of the rigid plates at a distance of at least 3 mm. 3. An elastic insert according to claim 1, characterized in that the end surfaces of the elastic plates are made of a concave shape with recesses along the entire perimeter of the elastic insert. 4. An elastic insert according to claim 1, characterized in that the recesses are cylindrical. 5. Elastic insert according to claim 1, characterized in that the recesses are spherical. 6. Elastic insert according to claim. 1, characterized in that the rigid plates are made of metal. 7. An elastic insert according to claim 1, characterized in that the elastic plates are made of polyurethane elastomer.

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