SU1216070A1 - Test bed for running-in crawler cars - Google Patents

Description

This invention relates to vehicle testing and can be used in running stands for tracked vehicles.

The purpose of the invention is to improve working conditions and reduce the harmful effects on the structures of nearby buildings and structures by reducing vibrations and noise.

The drawing shows the proposed stand, a general view.

The traction machine test bench contains a frame that is a welded spatial structure and consists of the lower part 1 and the upper part 2. The lower part 1 of the frame is rigidly fixed to the concrete foundation 3. The upper part 2 of the frame has tension wheels 4 and support rollers 5, covered by the tracks 6, onto which the running machine 7 is being mounted. Between the upper part 2 and the lower part 1 of the frame there are installed elastic shock absorbers 8.

The elastic shock absorber 8 consists of two metal plates between which a layer of rubber vulcanized to them is placed at an angle to the horizontal plane. The bottom plate of the shock absorber 8 is bolted to the bottom of frame 1, and the top of the frame 2 is bolted to the top plate of the shock absorber. The shock absorbers 8 are installed on the counter-portions of the frame so that the inclination of the elastic elements (rubber) is directed towards each other.

The drive wheels 9 of the stand are connected with flywheels 10 through step-up gearboxes (not shown). The fastening mechanism of the running machine 7 to the foundation 3 consists of extensions 11 of adjustable length.

The stand works as follows.

Run-in tracked vehicle 7

enters the braked (brakes do not

shown) tracked belts 6 stand, and with

using stretch 11, it is fastened to

foundation 3. For running tests, include the engine of the tracked vehicle 7, while its tracks interact with the tracks of the stand 6 and, due to the adhesion forces, bring them into

 motion. Flywheels 10 imitate the moment of inertia of the mass of the machine when it moves through the terrain. Including the corresponding steps in the gearbox of the run-in machine 7 and changing engine rpm, get different speeds of work. The longitudinal reactive force that occurs when the stand is operated on tracks 6 is transmitted through the upper part 2 of the frame to the protrusions of the lower part 1 of the frame and further to the foundation 3. Vertical oscillations (vibrations) are not transmitted from the upper part of the frame to the lower elements (rubber-metal shock absorbers).

The stand design allows for run-on tests of high-speed, high-capacity tracked vehicles and, at the same time, reduce vibrations and noise.

five

Claims (2)

1. BREAK-IN STAND TRACKED MACHINES, comprising a frame rigidly fixed to the foundation, tracked belts covering the idler wheels and track rollers mounted on the frame, and a mechanism for securing the test machine, characterized in that, in order to improve working conditions and reduce the harmful effects on the structures of nearby buildings and structures by reducing vibration and noise, the frame is made of two parts - the upper and lower, between which elastic shock absorbers are installed obliquely to the horizontal plane along the perimeter, and on the opposite portions of the frame tilting damper is configured to meet each other. 2. Stand by π. 1, characterized in that the elastic shock absorber is made in the form of two metal plates, between which a vulcanized rubber layer is placed ..