RU2588557C1 - Disc brake of railway vehicle - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to railway vehicles, particularly, to disc brakes. Disc brake comprises disc casing with suspension cushioned frame of vehicle, brake cylinder, levers, pivotally connected therewith shoes with friction linings and turn angle limiter. Turn angle limiter represents a parallelogram-crank mechanism. Parallelogram-crank mechanism is located in space under brake unit within its dimensions and is formed by housing, parallelogram links and articulated with them moving slides.

EFFECT: providing uniform wear of friction pads in horizontal plane and providing compactness of design of brake unit.

1 cl, 3 dwg

Description

The invention relates to brake equipment of railway vehicles, in particular to disc brakes.

The disk brake of a vehicle is known [Registration number of the application No. 94044853/11, 12/21/1994, publication number No. 2088451, MPC index - B61H 5/00], comprising a brake disk mounted on the wheel axle, shoes with rods and levers pivotally mounted on the frame of the trolley containing the hinges of fastening the rods of the shoes made in the form of a fork interacting with a finger, and the hinge of fastening the levers to the frame, characterized in that each finger of the hinges of fastening the rods of the shoes is made longer than the diameter of the fork, and parallel to the ends of the finger are made the basics with the possibility of installing a locking element in them, made in the form of a cylindrical spring, mounted with a fork, with a number of turns of more than one, and the hinge of the levers to the frame is made two-stage, one axis of which is parallel to the plane of the brake disc, and the other is perpendicular to it, the axis of the two-stage hinges intersect.

The disadvantages of the presented analogue are the following: the design of the link rods due to insufficient stiffness does not ensure uniform wear of the friction linings in the horizontal plane, nor does it ensure the compact design of the disc brake.

As a prototype, a disc brake of railway rolling stock was selected [Registration number of the application No. 1269760 / 27-11, 09/13/1968, publication number No. 386497, IPC index - B61H 5/00], containing a disk attached to the wheel, friction linings interacting with a drive device, and a cylinder, characterized in that, in order to ensure uniform wear, the friction linings are suspended on the frame using rigid links and parallel articulated fingers passed through the fork-shaped ends of the hard links.

The disadvantages of the prototype are the following: the design of the disc brake with rigid links suspended on the frame and parallel articulated fingers does not ensure uniform wear of the friction linings in the horizontal plane due to the presence of technological gaps in the articulated joints and short articulated fingers, and also does not provide a compact design of the disc brake.

The problem to which this invention is directed is:

- ensuring uniform wear of the friction linings in the horizontal plane;

- ensuring the compact design of the brake unit.

The solution to this problem is achieved by using the original design of the device for limiting the angle of rotation, made in the form of a parallelogram-rocker mechanism, which is a long traction, one end rigidly connected to the shoe, the other end movably connected to a translational kinematic pair with a parallelogram mechanism.

In FIG. 1, FIG. 2 shows the proposed disc brake brake unit equipped with two rotation angle limiting devices. In FIG. 3 shows a block diagram with angle limiting devices.

The disk brake comprises a disk 1 and a brake unit, consisting of a suspension 2, which is mounted on the sprung frame of the vehicle, body 3, brake cylinder 4, levers 5 and pads 6 pivotally attached thereto with friction linings 7, the friction surfaces of which are parallel to the friction surfaces disk 1, long rods 8, rigidly connected at one end to the shoes 6, the other ends movably connected to parallelogram mechanisms formed by the housing 3, parallelogram links 9 and sliders 10.

The proposed device operates as follows.

With the angular movement of the levers 5, the value of which depends on the gaps between the linings and the disk, the wear of the linings and the disk, as well as on the displacements of the disk relative to the brake unit, the friction surfaces of the linings 7 remain parallel to the friction surface of the disk 1, since the shoes 6 due to the use of parallelogram the rocker mechanism does not have angular movement relative to the housing 3 and, respectively, relative to the disk 1.

The uniformity of wear of the friction linings in the horizontal plane is ensured by the fact that a thrust is applied in the device for limiting the angle of rotation, a large length (determined by the dimensions of the brake unit) which compensates for technological clearances in moving joints that affect the uniformity of wear of the linings and the disk.

The compact design of the brake unit, equipped with devices for limiting the angle of rotation, is ensured by the fact that these mechanisms are located in the space under the brake unit within its dimensions.

Claims (1)

A disk brake comprising a disk, a housing with a suspension located on a sprung frame of a vehicle, a brake cylinder, levers, articulated shoes with friction linings, a rotation angle limiting device, characterized in that the rotation angle limiting device is made in the form of a parallelogram-rocker mechanism, and it is located in the space under the brake unit within its dimensions and is formed by a housing, parallelogram links and movable sliders articulated with them.

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