FR2666252A2 - Low mobile grain-cleaning machine with a vibrating table and screw brush for sizing (sorting) fodder peas and cereals - Google Patents

Abstract

The present Addition relates to the combination of a grain-cleaning system with long riddles and an air blast as in a conventional winnowing machine, with a screw brush and its semi-circular stationary riddle which is scraped mechanically so as to prevent it from becoming clogged up by broken grains. It comprises an independent electric motor (1) which controls the axial fan (3) from which the current of air passes between the riddles (5) and (6), thereby removing any bits of straw or dust. These riddles are actuated by two eccentrics located at each end of the shaft of the fan. Loading is carried out from the side via the hopper (4). The whole and broken grains then fall to the bottom of the removable stationary semi-circular riddle bolted beneath the screw brush (8) for removal of the broken grains. The screw brush is controlled by the geared motor (2). A reduction gear operating by means of unequal chain sprockets with a rocking arm and connecting rod (10) actuates the rubber-covered scraper (9) which is moved to and fro by pivoting at each end of the shaft of the screw brush. It should be noted that all the riddles are interchangeable.

Description

 The present addition relates to improvements made to the patent filed on 10/18/89 by the applicant under the same title and registered under number 89 13727. It is a lowered mobile sorter intended mainly for sorting seeds of feed peas and cereals to the iron, while the classic sorters are high and fixed requiring the presence of an elevator to feed them.

 Unlike the original model described in the main patent and the first addition, the present invention comprises at the top 2 long grids with alternating longitudinal movement (when that of the top advances, the other recedes). These grids are animated bi laterally by 2 connecting rods with eccentrics fixed at the end of the shaft of the 4-blade fan which is set in motion (500 to 600 rpm) by an independent motor. The air flow circulating between the 2 grids eliminates the bales of straw or light impurity which pass through the first grid (oblong holes for cereals) The 2nd grid (preferably provided with round holes) has the function of retain these light impurities to eliminate them better on the outside.

 Whole and broken grains, after having passed through the first animated flat grids, then fall inside at the bottom of a fixed semi-circular grid inside which a screw brush rotates at around 40 revolutions per minute with a diameter of approximately 250 mm. This screw brush is rotated by an electro-reducer, the movement of nylon bristles arranged in turns having the aim of moving the grain and even making it rise inside the fixed semi-circular grid, the latter being slightly inclined. broken or insufficiently calibrated grains then pass through the holes in the auget grid, the perforations of which have been determined according to each seed, they are then collected inside a chute inclined parallel to the screw brush - semi grid assembly fixed circular and slide down into a receptacle provided for this purpose.

 To prevent broken grains from becoming trapped when the perforations of the fixed semi-circular grid pass, it is swept all along its route by a flexible rubber scraper (or brush) which pivots at each end of the shaft. screw. The back and forth sweeping movement is controlled by a device located at the lower end of the screw brush. This movement is carried out in slow motion by a set of chain sprockets, a small one at the end of the shaft of the screw brush which controls another four or five times larger, which is provided with a nylon cam inside which slides a steel rod connected to a fixed point articulated at a certain distance from the chassis. The cam turning at reduced speed imposes a back and forth movement on the steel rod which is connected at the bottom to the scraper device by a connecting rod.

This automatic cleaning element was essential for ratio
nalize the device and enhance it, some broken or ethical grains
pushed by the bristles of the nylon brush tending to stay wedge
cés with the passage of the perforations of the semi circular grid.

The invention will be better understood on reading the following description
putting you in contact with the attached drawings which schematically represent an example of embodiment
Figure 1 shows a view of the whole, the first upper half shows the tarare: grilles and fan, the lower half
the screw brush device with its automatic cleaning device for the semi-circular grid at the end of the screw.

Figure 2 shows the automatic cleaning device of the
semi-circular lower grid with indication of the different positions
from the whole.

FIG. 3 represents an overall view of a sorting station and
processing in the context of the invention.

Referring to Figure 1, we will note in (1) the electric motor
which animates opposite side the fan with 4 blades (3) which propels by means of 2 eccentrics at the ends of the shaft.
with its 2 removable grids (5) and (6) which by a set of pendulum
have an opposite movement to avoid vibrations, the electro-reducer (2
chain drive the screw brush (8) located at the level below the interior
laughing of the semi circular grid which must eliminate the broken grains
which fall into the chute (ll) and slide into a receptacle
tion. The feeding can be done laterally the vibrating hopper
(4) being integral with the upper shaking table. To facilitate the movement of the device, two handles (7) allow to lift the
sorter which rests on two wheels. In (9) the scraper device which pivots at each end of the shaft of the screw brush to clean the grill
the semi-circular is driven by the device (10). The receiving chute (11) (shown in transparency) allows to recover the grain case
if they fall from the semi-circular grid, they slide and can be
poured into a ground bin.

Figure 2 US. shows the principle of the device in double position
cleaning of the semi circular grid which by means of a doctor blade
flexible extracts grains blocked in the slots. The small pinion (12) fixed at the end of the shaft of the screw brush drives by chain the large pinion (13) at reduced speed. The nylon cam or ertalon (14) which pivots on the periphery of the pinion (13) 'being pierced transversely by a stretched round steel rod (15), which pivots in its upper part to a fixed articulated point (16), the lateral back and forth movement is' transmitted by the adjustable jumper (17) to the connecting rod (18) which actuates the scraper device (19)
Note the two extreme positions of the scraper device, left position in solid lines, right position in dotted lines.

Figure 3 shows in plan a schematic overview of a zhantier decriage and treatment. The bucket (20) pours the grain to be sorted and treated on the side of the sorter (21) via a special chute, which pours the calibrated grain into the receiving hopper with a screw with a flexible bottom ( 22) (by way of nonlimiting example), the grain rising directly into the trailer (23) after treatment;
Note that this sorter is adjustable in inclination and height, the ventilation is also variable. All grids are interchangeable.

Claims (3)

1 - Combination of a device provided with two long grids shaken longitudinally with opposite movement with axial fan inspired by the classic tarare to perfect the cleaning of seeds on the farm, on the one hand, with a screw brush rotating at about 40 rpm at the interior of a semi-circular grid on the other hand, according to claim 1 of the main patent. 2 - Device according to claim 1 concerning the shaking of the two upper grids from the two ends of the fan shaft, characterized in that the latter is provided with an eccentric at each end for jointly actuating the control rods. 3 - Device according to any one of the preceding claims characterized in that the receiving hopper being in the center, the grain supply will be on the side of the device. The tilting skip containing the grain awaiting will be provided with a special chute so that the discharge is made at the top and in the center of the upper grid.  n 4 - Device according to claim 1 of the main patent concerning the mechanization of the external scraper system of the semi-circular grid by a bar with rubberized edge pivoting at each end of the shaft of the screw brush, characterized by the presence of a speed reducer assembly: the shaft of the screw (at the lower end) is provided with a small chain sprocket which transmits reduced rotation to another large diameter sprocket which drives an eccentric nylon cam which is crossed by a gnawing steel rod which swivels at a fixed point articulated high transmits a back and forth movement lateral to the rod which controls the scraper.