RU1775322C - Belt drive tensioner of rail car generator - Google Patents

Abstract

Usage: railway transport. Essence: the support is located perpendicular to the line, aligned at the middle position of the driven pulley assembly made in the form of a pusher, with the axis of the tensioning screw and located to it at angles Vi and l / z, respectively, with the pendulum being in its highest position and in its lowest position . 3 ill.

Description

The invention relates to railway transport, in particular to a carriage generator drive, and can be used in belt drives with a significant change in the center distance.

The aim of the invention is to increase the reliability of the device in operation.

In FIG. 1 schematically shows the location of the proposed device; in FIG. 2 - geometric location of the extreme points of the proposed device during operation; in FIG. 3 is a general diagram of the proposed device.

A device for tensioning a belt drive 1 of a wagon generator drive comprises a hinge connected as a pivot assembly of the driven pulley (gear housing) 2 with a tension screw 3 and a lever nut 4. The screw 3 is passed through the hole 5 of the bracket 6, which is rigidly fixed to the frame of the carriage and interacting with the tensioning screw 3 by means of a lever nut 4, a spring 7, resting its end on the bracket 6 through the support 8 with an opening for the tensioning screw,

the lever nut 4 has a centering spring 7 protrusion 9. The support 8 is rigidly connected to the bracket 6, is provided with a shoulder 10 that fixes the end of the spring 7 from displacement when moving the screw 3 and is located in the center of intersection of the beams AiBi (minimum belt length) and AgVA (maximum belt length ), which characterize the extreme positions of the tension screw 3, and is installed perpendicular to the line aligned at the middle position of the rotor and the axis of the tension screw and located relative to the latter at angles ipi and 1/5, respectively, at the extreme upper the position of the pendulum and its extreme lower position, while

At

1-p

tp arcsin

m (t - 2 p) + 1

g:

1 -k

1p2 arcsin

m (m - 2 k) + 1

where, m TT-; k sin (y - W, n sin -I- w H

L is the distance from the swinging axis of the tensioning screw to the axis of the specified hinge with the middle position of the pivot;

R is the distance from the axis of the pendulum suspension to the axis of the hinge;

(p is the limit angle of deviation of the pendulum from the middle position;

X is the angle between the indicated lines.

The operation of the device is as follows.

One of the advantages of coil (coil) springs used in this device is their ability to absorb loads simultaneously in two directions. This ability is characterized by two indicators; stiffness of compression and transverse or shear stiffness. At an atom, the nature of the stress state of the spring rods does not change; under the simultaneous action of loads in two directions, the spring rods always work on twisting.

In the device according to the invention, when compressing the spring 7 with the lever nut 4, the screw 3 is centered relative to the hole 5 of the support 8 due to the lateral stiffness of the spring. In this case, in the case of parallelism of the support surface of the nut 4 with respect to the support 8, the pressure plot is uniform over the entire surface.

When the screw 3 deviates from the neutral position in the position formed by the extreme positions of the screw at the minimum and maximum lengths of the belt, the parallelism of the supporting surfaces of the nut 4 and the support 8 and the pressure plot becomes uneven, which causes the moment Мпр, which will tend to return the screw З to neutral position.

Thus, any deviation of the device from the neutral position causes the appearance of the moment Mpr, which returns the entire system to its original position.

Claims (1)

SUMMARY OF THE INVENTION A belt drive belt drive device of a wagon generator, comprising an idler with a driven pulley, a bracket suspended on a carriage frame, a bracket fixed to it, a flat support rigidly connected to it, passed through a coaxial hole made in the latter and about the bracket, a tension screw with a nut at one end, connected at the other end by a hinge to the pivot, and a compression spring located between said support and a screw nut, the axis of which is located in the swing plane of the pivot at an angle greater than 90 ° to the line intersected with the axis of the suspension of the swivel and the axis of the hinge mentioned, in order to increase reliability, this support is located perpendicular to the line aligned at the middle position of the pendulum with the axis of the tension screw and located to it at angles and t /, respectively, at the extreme upper position of the pendulum and at the extreme lower his position, while f 1 -n t / a res in m (m - 2 n) + 1 nf 1 -k ipi arcsin m (m -2 k) -f 1 where m is k sin (y -§), n sin (y + §); L is the distance from the swinging axis of the tensioning screw to the axis of said Sharnir with the middle position of the swivel; R is the distance from the axis of the pendulum suspension to the axis of said hinge; p is the maximum angle of deviation of the pendulum from the average overlay; y is the angle between the indicated lines. g / d. 1 FIG. 2