Patent ID: 6953397
Filing Date: 2005-10-11
Classification: A01F

Abstract:
1. A device for adjusting the width of a sieve mesh on a combine harvester for at least one sieve arranged in a cleaning unit of the harvester, where the sieve is fixed in a sieve box of the cleaning unit so that the sieve can be released and removed from the sieve box, louvres of the sieve being attached to twistable louvre wires, in kinks of which the louvre wires an adjusting rail is suspended, the adjusting rail being connected with an adjusting mechanism via a transverse shaft, the device comprising: the transverse shaft and the adjusting mechanism being arranged at a fixed position on the sieve box, the transverse shaft being located beneath the sieve and having an upwards directed driver attached to one end of the transverse shaft such that the driver cannot twist relative to the transverse shaft, the driver being connected with the adjusting rail via an engagement which is released by an upwards movement of the sieve, wherein the one end of the transverse shaft is carried in a region of the longitudinal central plane of the sieve box in a bearing plate and an opposite end of the transverse shaft is carried in a region of a longitudinal spar of the sieve box where the transverse shaft is coupled with the adjusting mechanism, and wherein the transverse shaft can turn about a longitudinal axis of rotation therethrough, the adjusting mechanism consisting of a pivoted lever connected with the transverse shaft so as to turn about the axis of rotation, one end of a connecting rod being flexibly joined to the lever and extending in a direction of the longitudinal spar and an opposite end of the connecting rod flexibly connecting with a setting lever fixed at a rear end, viewed in the direction of a flow of threshed material, of the sieve box.