SU657303A1 - Stand for testing universal-joint transmissions - Google Patents

Description

(54) STAND FOR THE TESTING OF CARDS

one

The invention relates to mechanical engineering and can be used in the study of individual components and components of cardan gears.

A stand for testing a vehicle is known; this gear contains an electric drive, brake and collector device l.

However, such a stand has a high energy consumption, since an open-loop circuit is used.

By technical drying and the effect achieved, the closest to the proposed invention is a stand for testing cardan gears, comprising a case in which a rotating drum with an eccentrically located shaft inside it, which is connected to only the branches of the tested cardan gears, is placed, the device for loading gears is cool moment and measuring equipment 2

A disadvantage of the known test bench is that the test conditions differ from the operational conditions.

The purpose of the invention is to bring the test conditions closer to operational ones by providing branches of cardan gears with an additional degree of freedom.

This is ensured by the fact that the proposed stand is equipped with a device b for simulating torsional vibrations with a drive, clutches located in. housing and intended to be mounted therein and to provide rotational and axial movement

W other branches of the tested gears, with one of the couplings connected to. a loading device, and the other with a device for simulating torsional vibrations.

15 The drawing shows the diagram. the proposed booth.

The stand consists of a drive 1, a rotating drum 2 with an eccentric shaft 3 located inside it,

Claims (1)

2fr which is associated with branches 4 and 5 is. tried cardan gears, sleeves 6 and 7, mounted in the stand body 8 on rolling bearings 9, elastic element 10, torque loading device S 11 consisting of a screw pair 12 and an electric actuator 13, device 14 for modeling torsional vibrations , executed in the form of a crank mechanism 15 with a drive 16, and instrumentation equipment containing frequency converters 17 and 18, temperature converter 19 and torque converter 20. The elastic element 10 is connected to the clutch 6 by a lever 21, and the device 14dl modeling torsional vibrations is connected to the clutch 7 by a lever 22. The stand operates as follows. The actuator .1 rotates the drum 2, as a result of which the shaft 3 eccentrically located inside it makes a circular translational motion, and the branches 4 and 5 of the tested cardan gears associated with it describe the solid angle 2 7. In the joints of cardan gears, the movement that takes place with a uniform rotation of the cardan gear with the angle of inclination jf is reproduced. The axial movements are compensated for by the couplings 6 and 7. The torque is created by the compression of the elastic element 10 by the mechanism 11, transmitted by the lever 21 to the coupling b and closed through the branches 4 and 5, the shaft 3, the coupling ,, the lever 22, the mechanism 15 on the body 8 of the stand. Installing couplings b and 7, providing axial displacement for four and five driveline shafts, allows each branch to be assembled from two series-connected universal joints, resulting in a short and rigid kinematic chain when testing the needle bearings. Simulation of movements corresponding to torsional vibrations is carried out by the device -14. When the drive 16 is rotated, the crank mechanism 15 through 22 will receive the oscillating motion around its axis. The swing dvizkenie clutch 7 is transmitted to the branch 5, the shaft 3, the branch clutch 6 and through the lever 21 - on the resisting element ip. With the simultaneous action of a static torque, the elastic element 10 is periodically compressed and the cardan gears 5 and A are loaded with cyclically torque. The frequency of the simulated torsional vibrations determines with the scattering of the rotation of the drive 16, the amplitude of the swinging movement by the radius of the crank of the mechanism 15 and the length of the lever 22, and the amplitude of the cyclic torque at a given oscillation amplitude by the rigidity of the elastic element 10 and the length of the lever 21. Thus , the stand allows simultaneously with static static torque loading to simulate torsional vibrations with the specified parameters in cardan gears and, thereby, increase the accuracy of reproduction of operating conditions s during the test transmissions. The bench also allows you to perform accelerated resource and other tests, for example, by assessing the effect of cyclic fluctuations on the performance of the drive shafts of individual parts and nodes. Claims for testing cardan gears, comprising a casing in which a rotating drum with an eccentric shaft located inside it is placed, which is connected with one of the branches of the cardan gears under test, a torque loading device and test equipment due to the fact that, in order to approximate the test conditions to the operational ones, by providing the branches of cardan gears with an additional degree of freedom, it is equipped with a device for simulating torsional angles The drives are housed with clutches housed in the housing and intended to be installed in them and provide rotational and axial movement of other branches of the tested gears, one of the clutches being connected to the gear loading device, and the other to the device for simulating torsional vibrations. Sources of information taken into account in the examination of 1, Lysov M, I. Cardan mechanisms, M ,, Mashgiz, 1945, s, BUT, figs 95, 2, USSR Author's Certificate No. 396578, cl, G01 M 13/02, 1973, w eleven / g