RU2254254C1 - Brake beam - Google Patents

Abstract

FIELD: railway transport; rail vehicle brake leverage.

SUBSTANCE: proposed brake beam contains bar with string divided in middle part by brace and connected at ends by means of force transmitting unit consisting of series-mounted thrust yoke, insert, brake holder with shoe and end piece held from longitudinal displacement by means of device with flexible member. Said member is made in form of cylinder arranged between thrust surface of end piece and wedge ring whose inner surface is made in form of truncated cone engaging with outer surfaces of locks getting into conical slot made on end cylindrical surface of string.

EFFECT: provision of reliable fixing of brake holder against longitudinal displacement, possibility of easy disassembling of said unit.

3 cl, 5 dwg

Description

The invention relates to railway transport and relates to designs of triangles of linkages of brakes of railway rolling stock.

A known design of the triangel brake linkage of the trolley of a railway vehicle [A.S. USSR No. 1006293, B 61 H 13/36, B 60 T 11/04, publ. 03/23/83, bull. No. 11], comprising a beam with shoes connected to each other, a string and a spacer with holes for mounting a vertical lever, made coaxially with the eyes of the shoes, the axes of which are aligned with the center of gravity of the triangel.

The disadvantage of this design is the fixation of the shoes in the longitudinal plane using a threaded connection. During operation, this compound weakens and requires tightening during each depot repair. As a result of this, the shoe is skewed during braking, which leads to increased wear of the brake pads.

Also known is the brake link triangel [US Pat. RF №2199458, В 61 Н 13/34, publ. 02/27/03, bull. No. 6], comprising a beam from a channel, in the inner cavity of the end parts of which a string with tips is installed, separated in the middle part from the beam by a spacer, while the cantilever parts of the latter together with the end parts of the beam are fixed in the landing holes of the brake shoes with rivets that compress the brake shoes to horizontal shelves of the beam and passing through the cutout on the rear surface of the brake shoes.

The disadvantage of this design is that in accordance with the requirements of the Ministry of Railways of the Russian Federation for the overhaul of rolling stock, it is necessary to remove the brake shoes from the triangel and check their condition. However, a rivet joint, even located in an easily accessible place, requires large expenses for disassembly, as well as special equipment for assembling the triangel.

As a prototype, the design of the brake triangel [A.S. USSR No. 1437281, B 61 H 13/34, publ. 11/15/88, bull. No. 42], comprising a beam of rectangular cross-section, at each end of which a power transmission unit is mounted on the brake shoe, consisting of a sequentially placed restrictive bracket, a bookmark, a shoe with a rectangular landing groove fixed by a safety tip, while an elastic spring is located between two of the successively placed parts an element with a recess made on the side of the rear face of the beam, and one of the parts of the force transmission unit mating with the elastic element is made with a protrusion placed recess, wherein the projection height smaller than the width of the elastic member.

This design also does not have the proper reliability when fixing the shoe, because under the influence of lateral forces on the brake shoe and provided that it is tilted, the shoe’s shoe opening should be larger than the profile dimensions of the triangel beam, which during operation will lead to the shoe shoe’s landing holes breaking. Along with this, the elastic element, constantly working under alternating loads, misses, which leads to the appearance of gaps in the node of the transmission of force to the brake shoe.

The task to which the invention is directed is to create a triangel design that provides reliable fixation of the brake shoe against longitudinal movements and the ability to quickly disassemble this assembly.

The problem is solved as follows.

The force transfer unit is secured against longitudinal displacements by means of an elastic element located between the thrust surface of the tip and the wedge ring. The wedge ring is fixed from the force of the elastic element by means of crackers inserted in a conical groove at the end of the cylindrical surface of the string.

The essence of the claimed invention lies in the fact that the brake triangel contains a beam with a string, separated in the middle part by a spacer, and connected at the end parts by a force transmission unit, consisting of a thrust bracket, a bookmark, a brake shoe with a shoe and a tip secured by a device containing an elastic element made in the form of a cylinder and located between the supporting surface of the tip and the wedge ring. The inner surface of the wedge ring is made in the form of a truncated cone and interacts with the outer surfaces of crackers included in a conical groove made on the end cylindrical surface of the string. At the same time, all conical surfaces of the attachment device of the force transmission unit are sloped towards the central axis of the triangel, and threaded holes are made on the end surfaces of the string.

The essence of the invention is illustrated by drawings, which depict:

in Fig. I is a General view of the triangel;

in Fig. II - node transmission effort;

Fig. III - node transmission of effort with a mechanism for installing / removing the mounting device of the node;

in Fig. IV - the order of assembly and installation of crackers in the force transfer unit;

in Fig. V is a force transmission unit with a mechanism for mounting / removing the unit mounting device in a compressed state.

The brake triangel consists of a beam 1, a string 2, which are divided in the middle part by a spacer 3, and connected at the end parts by a force transmission unit 4. The force transmission unit 4 contains a thrust bracket 5, a tab 6, a brake shoe 7 with a shoe 8 in series and tip 9. This assembly is fixed from longitudinal displacements by means of a device that contains an elastic element 10, a wedge ring 11 pressing it, fixed by crackers 12 in conical grooves 13. On the end surface of the triangel string 2 is threaded e hole 14.

The assembly of the triangel is performed in the following sequence. The beam 1 with the string 2, separated in the middle part by a spacer 3, is connected at the end parts by a stop bracket 5 by welding. Then, alternately put on the tab 6, the brake shoe 7 with the shoe 8, the tip 9 and install the elastic element 10 and the V-ring 11. In the threaded hole 14 twist the squeeze device, consisting of a shaft 15 with a nut 16. Between the V-ring 11 and the nut 16 establish a bowl 17. After that, the nut 16 is twisted on the shaft 15, pressing the elastic element 10. When the elastic element is pressed, the crackers 12 are installed in the conical grooves 13, then the nut 16 is loosened and the release device is removed. To prevent the formation of rust, the threaded hole 14 is coated with grease.

The device for fixing the force transmission unit has sufficient simplicity and reliability, and also provides quick removal of the shoes or their installation under a different track by changing their places with tabs 6, without rolling out and disassembling the carts from under the cars, which allows this operation to be carried out directly on the tracks . The release device is also easy to manufacture, which allows it to be manufactured in any depot.

Currently, the claimed design documentation has been developed and prototypes are being tested.

Claims (3)

1. A brake triangel containing a beam with a string, separated in the middle part by a spacer, and connected at the end parts by a force transmission unit, consisting of a thrust bracket, a bookmark, a brake shoe with a shoe and a tip secured from longitudinal movements by means of a device, containing an elastic element, characterized in that the elastic element is made in the form of a cylinder and is located between the thrust surface of the tip and the wedge ring, the inner surface of which is made in the form of a truncated cone and interacts with the outer surfaces of crackers included in a conical groove made on the end cylindrical surface of the string. 2. The brake triangel according to claim 1, characterized in that the conical surfaces of the wedge ring, crackers and conical groove are sloped towards the central axis of the triangel. 3. The brake triangel according to claim 1, characterized in that a threaded hole is made on the end surface of the string.

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