SU1650035A1 - Cleaning shoe of grain combine - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular, to the design of cleaning a combine harvester. The purpose of the invention is to reduce the load on the cleaning drive by balancing the screen and the lower sieve mill. The goal is achieved by the fact that two shoulders levers 6 are provided with blocks of springs 11. forces from which balance the tangential components of the masses of the transport board 1, upper sieve, one hundred by 2 with extension 3 and lower sieve camp 4, mounted on autonomous inclined suspensions 5, 7 and 8. 2 Il.

Description

FIG.

sl o about

Oj

with

FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular, to the design of cleaning a combine harvester.

The purpose of the invention is to reduce on-drive cleaning loads by balancing the screen and the lower sieve mill.

Figure 1 shows schematically the cleaning mechanism of a combine harvester, a general view; figure 2 - diagram of the forces acting on two shoulders levers.

Cleaning a combine harvester contains a screen, including a transport board, to which an upper sieve mill 2 with extension 3 is hingedly attached, and a lower sieve mill 4, which is mounted on inclined hangers 5 and hinged to the lower ends of two shoulders 6. The screen is mounted on autonomous inclined hangers 7 and 8 and pivotally attached to the upper ends of the double-arm b, which are inclined in the same way as the suspensions 7 and 8. The drive of the screen and the lower lattice mill 4 is carried out through the double arm b. ball shaft 9 and connecting rods 10. To balance the rumble to the two shoulders levers b, spring blocks 11 are hingedly attached so that the torque relative to the axis of rotation from the spring forces is equal to the moment of forces from the screen mass and the lower sieve mill and opposite to them, i.e. . equality must be respected

Frfh Fgh1.-Pnh1,

where Rpr - the total force of the blocks of the springs;

Pr is the tangential component of the mass of the screen;

PH is the tangential component of the mass of the lower sieve mill;

L is the distance from the axis of rotation of the arms to the points of application of the forces of the springs and forces from the tangential component of the screen;

I is the distance from the axis of rotation of the levers to the point of application of the tangential component of the lower sieve mill.

Cleaning works as follows. When the oscillating shaft 9 rotates, the connecting rods 10 through two shoulders levers 6 are driven into

a complex oscillatory motion of the lower sieve mill 4 and the screen consisting of the transport board 1 and the upper sieve mill 2 with extension 3, ensuring transportation and cleaning of grain from impurities.

The tilted position of the suspensions 5, 7, 8 and double-arm 6 provides the best conditions for separating the grain, and the blocks of the springs 11 reduce the loads in the drive units caused by the inclination of the suspensions, balancing the tangential components of the screen mass and the lower sieve pan.

Claims (1)

Invention Formula Cleaning a combine harvester containing a lower sieve mill and a screen mounted on autonomous inclined hangers and including a transport board, an upper sieve mill and an extension, the screen and the lower mill being pivotally connected to two shoulder arms connected via connecting rods with an oscillating drive cleaning shaft, so as to reduce loads on the cleaning drive by balancing the screen and the lower sieve mill, the two shoulders levers are equipped with spring blocks whose torque relative to the axis of rotation of these levers is equal to the magnitude of the total torque from the mass of the screen and the lower sieve mill relative to the same axis and is directed in the opposite direction. FIG. 2