SU553371A1 - Elastic coupling with variable stiffness - Google Patents

Description

The invention relates to mechanical engineering and can be used in all sectors of the national economy to connect the shafts of machines and mechanisms.

Known coupling elastic coupling with variable stiffness, contained driven and vedush, half coupling and elastic connecting element, such as a helical cylindrical spring, and designed to ensure the operability of components and assemblies of machines under conditions of abrupt changes in the level of coolant, its torque, strong shocks and montal inaccuracies.

The disadvantages of the known clutch are the lack of adhesion between the master and the driven elements at small values of the twist w, their moments and a small twist angle of the clutch in the coupled state, the magnitude and unevenness of the transmitted twist w, its moment, loss of the transmitted mosh.

The purpose of the invention is to increase the magnitude and stability of the transmitted torque.

This is achieved by the fact that a calibrated wiper is installed inside the spring with a gap, by means of which it is fixed to the coupling half at one end, and a second coupling half is installed coaxially with the latter with an additional elastic element fixed in it, for example a set of plate springs connected to the other end of the cylindrical springs.

FIG. 1 shows the proposed coupling in section; in fig. 2 is a section A-A of FIG. one.

On the housing 1, by means of bearings 2 and 3, a coupling half 4 is installed, on which at one end a cylindrical helical 5 is fixed, located in the cavity of the coupling half 4 with a clearance a. Through 5 with a radial gap in the calibrated sterling 6 missed, fixed on the coupling half 4.

Claims (1)

The second end 5 is supported on the bearing 7 fixed on the coupling half 4 and connected with the second coupling half installed coaxially with the coupling half 4 by the second coupling half 8 by means of an additional elastic element 9 made in the form of a set of lamellar ones. The additional elastic element 9 is fixed on the coupling half 8 with the aid of the flange 10. The coupling half 8 is fixed to the housing by means of the bearing 11. On the inner surface of the coupling half 4, and on the surface of sterling 6, in contact with the working surfaces of the spring 5, layers 12 and 13 of material are applied, having damping, strength, frictional and heat-resistant properties (for example, glass filler). The gaps in the surface by the working surfaces of the coil spring 5 and the calibrated surfaces of the coupling half 4 and the rod 6 are filled with a viscous liquid. In the quiescent state of the system and at small torques, there are no contacts between the working and calibrated surfaces of the rod 6 (gap b) and the coupling half 4 (gap a). Under the influence of torque, a moment occurs that tends to increase or decrease the diameter of the spring 5, which leads to a change in the size of the gaps in and a, established on the basis of the calculation of the deformation capacity of the elastic elements of the spring 5 and the additional elastic element 9. Active on the coupling half 4 the moment is transmitted to the coupling half 8 by means of a spring 5 and an additional elastic element 9, which serves to compensate for the elastic axial deformations of the spring 5 that occur simultaneously with a change in its diameter ly of sizes. When the torque level in the system exceeds a predetermined deformation capacity of the spring 5, the latter changes in diameter, it becomes trapped in contact with the calibrated surfaces of the coupling half 4 or rod 6, depending on the direction of the torque. When the gap in or a is eliminated, the coupler goes into the elastic-friction clutch mode, significantly changing its rigidity. Filling the gaps between the working surfaces of the coil spring 5 and the calibrated surfaces of the coupling half 4 and the rod 6 with a viscous liquid helps to equalize the specific pressure in their contact areas when trapped, and reduce the shock loads in the coupling and throughout the transmission system to increase the service life of the coupling . Claims of the invention The elastic coupling with variable stiffness, containing the driven and half coupling and the elastic connecting element, for example a helical cylindrical spring, characterized in that, in order to increase the magnitude and stability of the transmitted torque, a calibrated rod is installed inside the spring with a gap - it is fixed with one end to the coupling half, and the second coupling half is fixed coaxially with the latter with an additional elastic element fixed in it, for example a set of plate-like Ruzhin with which is associated the other end of the coil spring. Sources of information taken into account in the examination: 1. V.S. Polkov and I.D. Barbasch “Muff, M., 1964, pp. 252-263.