SU383643A1 - INERTIAL STAND FOR VEHICLE BRAKE TEST - Google Patents

Description

Inertial stands for testing brakes of vehicles, for example tractors, are known, which contain an inertial unit connected by means of a shaft to a test brake to which a hydraulic cylinder rod connected to the oil pump station is connected through a controlled link through a repulsive unit.

The aim of the invention is to provide tests for various types of brakes and to obtain a predetermined level and rate of increase in force on the brake drive.

This is achieved by the fact that the proposed stand is equipped with an additional hydraulic cylinder, the rod of which is loaded with replaceable weights, which determine the magnitude of the driving force, the piston cylinder cavity communicating with the oil of the pump station and the piston cavity with the hydraulic cylinder above the piston.

On the connecting pipeline, connecting the supra-and the sub-piston cavities of the additional hydraulic cylinder, a speck is installed.

The drawing shows a schematic diagram of the described stand.

It contains inertial installation /, connected by one end of shaft 2 with shaft 3 of test brake 4, and the other with wedge-belt drive 5 with electric motor 6

drive. The loading device 7 is connected. HITOKOM 8 operating power supply 9 with iO control link brakes 4. The overhead piston of the backrest 9 is connected to the airbag cavity of the supplementary 10G1 of the other handset // pipeline 12, and the piston is filled with a postboard, and an auxiliary wand is used. sixteen,

driven by the electric motor 17, - with the rod of the hydraulic cylinder 11, the stem of which is loaded with the load 18. The sub piston and pad piston cavities of the hydraulic cylinder 11 are connected to the reservoir 19 by a pipeline, on

which is located the crane 20.

The stand works as follows. For braking the test brake 4, an electric motor 17 is turned, rotating a pumping station 16, pumping oil from the sub-cavity of the working hydraulic cylinder 9 through a non-return valve 13 to the sub-piston cavity of the secondary hydraulic cylinder 11. The rod of the latter lifts the load 18 by a given velt1 stroke,

In this way, the rod of the working hydraulic cylinder 9 is extended to the same well, which, via controlled link 10, turns off the brake 4. When the brake 4 is turned off,

electric actuator 6, accelerating makhovye

3

mass inertial installation. For braking the flywheel mass of the inertial unit / after their acceleration, the electric motors 6 and 17 are simultaneously turned off. At the same time, the lifted load / 5 piston of the additional cylinder // moves the oil through the oil station 16 and the adjustable nozzle 14 into the sub-subshaped cavity of the working hydraulic cylinder 9, moving its brush to a predetermined stroke with a given rate of increase of the driving force through the controlled link test brake 4. The stroke of the controlled link 10 is controlled by the crane 20.

Subject invention

Claims (2)

1. An inertial test bench for a vehicle brake, for example a tractor, comprising an inertial installation connected by means of a shaft to a test brake to which, via a controllable link, is attached a working hydraulic cylinder brush connected to an oil pump station by means of a regulating unit, characterized in that, in order to enable the testing of brakes of various sizes and to obtain a predetermined magnitude and rate of force increase on the brake actuator, the stand is equipped with an additional gndrocylnndro.m, the scraper of which is loaded with interchangeable weights, which determine the magnitude of the driving force, and that its piston cavity communicates with the oil pumping station, and the over piston cavity with the piston cavity working hydraulic cylinder. 2. A stand according to claim 1, characterized in that a connecting pipe is installed on the connecting pipe connecting the above-piston and under-cavity cavities of the additional hydraulic cylinder crane.