RU36524U1 - Vehicle shock absorber test rig - Google Patents

Description

Vehicle shock absorber test rig

The utility model relates to installations for testing vehicles, in particular, to installations for testing shock absorbers of vehicles.

A known installation for testing shock absorbers of vehicles, consisting of loading a shock absorber drive and an elastic element connected to a recording device. The drive is made in the form of a crank mechanism, providing reciprocating movement. One end of the shock absorber is connected to the crank slider, and the other to the elastic element made in the form of two pneumatic pillows placed on a common bar ending in the electrical contact of the switching device of the recording device, made in the form of a set of electric lamps (US patent No. 3811316, CL 73 -11, 05.21.74 g.).

There is also known a device for testing shock absorbers of vehicles, consisting of a loading shock absorber of the drive in the form of a crank mechanism, on the flywheel of which an acting element is placed, and on the basis of the installation, sensitive elements and an elastic element with load cells. Moreover, the outputs of the load cells and sensitive elements are connected to the input of the recording device (RF patent. No. 2035032, G01M 17/04. Publ. 10.05.95, Bull. No. 13). Closest to the claimed technical essence

installation for testing shock absorbers of vehicles, containing a displacement sensor connected to a drive with a shock absorber in the form of a crank mechanism, resistance sensors and a recording device (RF certificate for PM No. 9526 G01M 17/04. Publish. March 16, 1999 Bull. No. 3).

But this installation is not technologically advanced and expensive to manufacture.

The task to which the claimed utility model is directed is

simplification and cheaper installation.

To achieve the technical result, in the installation for testing shock absorbers of vehicles, comprising a displacement sensor connected to a drive with a shock absorber in the form of a crank mechanism, resistance sensors and a recording device, an angular displacement transducer mounted coaxially with the crank mechanism is selected as a displacement sensor.

Distinctive features of the proposed installation from the above known, closest to it, are the choice, instead of a linear displacement sensor, an angular displacement transducer and its installation coaxially with a crank-crank mechanism

The choice of the encoder as the displacement transducer of angular displacements and its placement coaxially with the crank-crank mechanism makes it possible to simplify and cheapen the installation by reducing (compared with the linear displacement transducer used in the prototype) the number of elements used. In FIG. schematically shows the installation for testing shock absorbers.

The installation consists of a portal type 1 frame, in the upper part of which a strain gauge force measuring device 2 is rigidly fixed.

2

The force measuring device 2 is connected to the upper end of the shock absorber under test 3. The lower end of the shock absorber 3 is attached to the slider 4, which is pivotally connected to the connecting rod 5, which is connected to the pin 6, eccentrically located relative to the axis 7 mounted on the frame 1 with the possibility of free rotation. The angular displacement transducer 8 (for example, of the LIR-158A type) is installed coaxially to the axis 7 and has the outputs: counting 9 and strobe 10. The outputs of the force measuring device 2 and the outputs 9, 10 of the angular displacement transducer 8

connected to the corresponding inputs of the electronic device AND, which processes the received signals and provides the monitor 12 with information about the results of testing the shock absorber 3 and the operation of the drive (not shown in FIG.).

Installation works as follows.

When rotating with an electric motor (not shown in FIG.) Axis 7, the lower end of the shock absorber under test 3 by means of a slider 4 and a connecting rod 5 performs a reciprocating motion with variable speed. The second end of the shock absorber 3 acts on the force-measuring device 2 and deforms it.

The signal from the load-measuring device 2 is constantly supplied to the corresponding input of the electronic device 11. At the time when the connecting rod 5 takes a position, for example, top dead center, the signal 9 will appear at the output 9 of the angular displacement transducer 8

the beginning of the registration of the resistance forces of the shock absorber 3. In this case, to the electronic device 11 from the output 10 of the transducer of angular displacements 8. signals begin to arrive corresponding to a certain position of the slider 4, that is, the speed of movement of the piston of the shock absorber 3.

force measuring device 2. When the connecting rod 5 reaches the bottom dead center position, when the signal appears again at the output 9 of the angular displacement transducer 8, the value of the drive speed is recorded. In this case, the monitor 12 will display the true values of the rotational speed of the drive and the speed characteristic of the tested shock absorber 3.

The inventive installation for testing shock absorbers of vehicles, developed at LLC NPC-LADA and is currently being prepared for production.

Claims (1)

Installation for testing shock absorbers of vehicles, comprising a displacement sensor connected to a drive with a shock absorber in the form of a crank mechanism, resistance sensors and a recording device, characterized in that the angular displacement transducer mounted coaxially with the crank mechanism is selected as the displacement sensor.