SU1720552A1 - Mechanism for cleaning sieve of grain cleaning machines - Google Patents

Abstract

The invention relates to grain cleaning machines for post-harvest processing of grain. The purpose of the invention is to increase the efficiency of cleaning sieves from stuck grains in them due to automatic pressing of brushes to sieve canvases. The cleaning mechanism for sieve cloths contains a drive unit 1, a brush carriage 2 with support rollers arranged symmetrically with respect to the upper and lower sieve canals 7 of the sieve mill 8, and rotary crank axes 3 of brush packs 4. To achieve 2 J targets in the rotary crank axle of the brush pack installed a flat spring 5, under the action of which the crank of the axle is held in the upper position and the brushes with a predetermined force are pressed against the sieve screen. The second end of the spring is installed in one of the grooves of the adjusting comb 6. The working process is carried out as follows. The free end of the flat spring 5 is taken out of the adjusting comb 6 and rotated, which contributes to the bending of the spring. Under the action of the spring, the crank of the axle is turned upwards and the brushes are pressed against the grate canvas with such force that the pile of brushes protrude from the sieve holes by .1.5 ... 2.0 mm. After that, the formed end of the spring is placed in the nearest groove of the adjusting comb # 6. Then the machine starts up. The actuator 1 performs a reciprocating movement of the sieve mills and brush carriages. The grain mixture moves through the screen, fine particles fall into the holes of the sieves. The brushes with their nap clean the sieve canvases from the imprints of the grains in them. 3 il. fe VJ Yu O ate 01 hO

Description

This invention relates to grain cleaning machines for post-harvest grain processing.

The purpose of the invention is to increase the efficiency of cleaning sieves from sticking grains in them due to the automatic tightening of brushes to sieve canvases.

FIG. 1 shows the cleaning mechanism, a general view; in fig. 2 is a view A of FIG. 3; in fig. 3 is a section BB in FIG. 2

The cleaning mechanism consists of a drive unit 1 mounted on the frame of the machine, which receives movement from the electric motor and gearbox (not shown). The drive mechanism is connected to the brush carriages 2, in which the rotary crank axles 3 are installed. The brushes 4 are attached to these axes. The crank axles 3 are connected to flat springs 5, the second ends of which are installed in the grooves of the adjusting comb 6. 7, mounted in lattice mills 8. To change the force of pressing the brushes, the flat spring 5 is turned counter-clockwise from the groove of the adjusting comb 6 from position I to position II (Fig. 3). In this case, the flat spring is unbendable and the brushes are removed from the sieve. Then the flat spring is bent by a large amount from position II to position I (Fig. 2), rotated clockwise from position II to position I (Fig. 3), and inserted into the groove of the adjusting comb 6.

The mechanism works as follows.

The free end of the flat spring 5 is taken out of the adjusting comb b and rotated, which contributes to the bending of the spring. Under the action of the elastic force of the spring, the crank of the axle is turned up

and the brushes are pressed against the screen with such an effort that the pile of brushes protrude 1.5-2.0 mm from the sieve holes. After that, the deformed end is flat.

springs 5 is installed in the nearest groove of the adjusting comb 6. Similar operations are carried out to press the other brush packs against the remaining three rows of sieve webs. Thereafter

The machine starts up. Reshetnyh mills 8 receive oscillatory motion. A reciprocating motion is obtained from the actuator 1 of the brush carriages 2. This movement is transmitted to the packets of brushes 4 which glide along the sieves 7 from the bottom. A grain mixture flows through the sieve webs, which moves along the sieve, small particles fall into the sieve holes, and some particles are jammed into the holes. The brushes with their nap clean the sieve blades 7 from the grains stuck in them and thereby contribute to the improvement of the quality of grain cleaning.

Claims (1)

Invention Formula Cleaning mechanism of sieve cloths grain cleaning machines, containing a drive unit, upper and lower sieves, a brush carriage with support rollers located symmetrically with respect to the upper and lower sieve blades of a sieve mill, I distinguish between rotary crank axes of brush packages; u and with the fact that, in order to increase the efficiency of cleaning sieves of grains stuck in them due to automatic pressing of brushes to sieve canvases, the mechanism is equipped with an adjusting comb and a flat spring, one end of which is mounted on a rotary crank axis of the brush package, and the second - in one of the grooves of the adjusting comb. Budh FIG. 2 6-B