SU1188391A1 - Spring - Google Patents

Description

The invention relates to details

machines, namely to the springs for damping vibrations and protecting mechanisms, machines from harmful vibrations

and shock loads. five

The aim of the invention is to expand the range of regulation stiffness.

FIG. 1 shows a spring, a general view; in fig. 2 - the same, type of top- ¹⁰ xy; in fig. 3 — spring with L-shaped elastic plates, general view; in fig. A - section A-A in FIG. one; in fig. 5 is a section b-B in FIG. one; in fig. 6 - mechanism for changing the rigidity of plates with a remote control.

The spring contains a set of elastic plates straight 1 or curved 2 forms, installed in cages 3 and 4 20

for mounting the suspension. The sleeves 3 and 4 are equipped with mechanisms for regulating the rigidity of elastic plates 1 or 2, made in the form of transversely arranged pushers 5 and their displacement devices 25, for example screw pairs 6. The pushers 5 can be placed on each plate 1 or 2 from two ends or alternate. Then the other end of the elastic plate 1, or 2 rigidly embedded in the nests of the clips 3 or 4. For remote control of the spring stiffness, instead of screw pairs, pneumatic (hydraulic) 7 cylinders can be installed (Fig. 6). , 35

The spring operates as follows.

In the initial position, the elastic plates 1 have flat surfaces in the transverse direction and the spring 40 has a minimum stiffness determined by the length and moment of resistance to bending of its rectangular cross-section ..

With the translational movement of 45 pushers 5 with screws 8 by an amount of 8 ', the elastic plates 1 deflect in the transverse direction with the formation of a deflection b. The action lines of the pushers 5 in the cross section of the elastic plates 1 50 π из of the bending stresses that propagate in the direction towards the opposite end. Due to this, the elastic plates 1 take a convex shape with a variable and a deflection length varying from the maximum value

to zero. In this case, depending on the value of the deflection b, the stiffness of the elastic plates 1 can be increased by more than 1.00 times compared with the initial one, since the bending resistance is cubic depending on the amount of deflection. The lateral effect on the elastic plate 1 allows you to adjust the stiffness of the spring in the process of the machine on which it is installed.

Spring with G-shaped elastic plates 2, the initial position of which is shown by thick lines, is intended for the perception of mutually perpendicular loads and works as follows.

The stiffness of the spring in the initial position is determined by the potential energy of inflection, depending on the radius B, the length B ·, and b ^ of the arms and elastic plates 2 and the total resistance to bending of their cross sections.

With the progressive movement of the pushers 5 with screws 8 by the value of 8, the flat shoulder of the elastic plates 2 bends in the transverse direction by the value of N. The resulting bending stresses propagate in the direction of the bend and are transformed in the bend zone into the bending ones aimed at its extension. This changes the stiffness of the flat shoulder, as well as the bending energy, which allows you to adjust the stiffness of the elastic plates 2, more than 100 times.

The reversibility of the L-shaped elastic plates 2 according to the perception of the loads and the change of the adjusting shoulders makes it possible to assemble from them spring families with wide ranges of adjustments of their characteristics.

1 188391

1 1 88) W I

4

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b

FIG. five

Fi d. 6

Claims (2)

A CAMERA containing a set of elastic plates installed in cages for mounting the suspension, and a stiffness control mechanism in the form of a pusher with a displacement device, characterized in that, in order to extend the range of stiffness control, one ends of the plates are alternately embedded in the cage, others are connected to the pushers, and the latter are installed in the transverse direction to the plates. -gl <0 2 and 1188391 1188391