SU1413313A1 - Elastic connecting rod - Google Patents

Abstract

The invention relates to mechanical engineering, namely to structural designs of mechanisms with elastic links. The goal is to increase efficiency by reducing the starting loads without eliminating the law of the established movement of the driven link mechanism. The elastic connecting rod contains two stems 1 and 2 and their connecting elastic link 3, made in the form of an insert 4 and two compression springs 5 and 6 installed in two threadedly connected cups 7 and 8. The glass 8 is made with a groove 9, which has a stop element 10 connected to the stem 1 and in contact with the spring 6 with the end of the glass 7. The spring 5 is placed between the insert 4, which contacts with the end of the glass 8, and the stop shoulder 11 formed on the rod 2. The device allows reduce starting loads. 4 il. with

Description

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The invention relates to mechanical engineering, namely to structural designs of mechanisms with elastic links.

The purpose of the invention is to increase efficiency by reducing the starting loads without distorting the law of the established movement of the driven link.

FIG. 1 shows the rod; in fig. 2-4 - characteristics of setting the connecting rod.

The elastic connecting rod contains two stems 1 and 2 and a connecting joint, its elastic link 3, made in the form of an insert 4 and two compression springs 5 and 6 installed in two threadedly connected glasses 7 and 8. The glass 8 is made with a groove 9, which has a stop element 10 connected to the rod 1 and in contact with the spring 6 with the end of the glass 7. The spring 5 is placed between the insert 4, in contact with the end of the glass 8 and the resistant shoulder 11, made on the rod 2.

By rotating the cups 7 and 8 relative to each other, the required characteristic of the connecting rod from the position shown in FIG. 2–4, where the displacements A of the rods 1 and 2 are plotted relative to each other along the abscissa axis, and the force P counteracting these displacements along the ordinate axis.

With slightly compressed springs (gaps selected), the characteristic of the connecting rod is linear-elastic (Fig. 2). When compressed to

touching the coils of the springs the characteristic of the connecting rod is rigid (Fig. 4). The intermediate characteristic of the connecting rod is determined by the amount of spring pre-compression, which will be linearly elastic with a shoulder. The magnitude of the step depends on the degree of compression of the springs.

When the mechanism starts, under the action of the starting force, exceeding the spring preload force, the connecting rod works as elastic, after reaching the steady state, the forces acting on the connecting rod decrease and the rod becomes rigid, because the spring closing force is greater than the force acting on the connecting rod.

Claims (1)

Invention Formula An elastic rod comprising two rods and an elastic element connecting them, characterized in that, in order to increase Efficiency by reducing the starting load without distorting the law of the steady motion of the driven link mechanism, the elastic link is made in the form of a liner and two compression springs installed in two threadedly connected glasses, one of the glasses is made with a groove in which a stop element connected to the rod and contacting by means of a spring with the end of the second cup, and the second spring is placed between liner in contact with the end of the first glass and the thrust collar, made on the second stem.