HARVESTER THRESHER GRAIN CHAFF REMOVAL SYSTEM

摘要

The invention relates to agricultural engineering, in particular to a harvester thresher grain chaff removal system for a harvester thresher with a drive mechanism which provides reciprocating movement of tools. The objective of the invention is to simplify the design, to reduce dynamic loads in the drive and to increase reliability by means of reduction of inertia forces of vibrating tools. The objective is achieved by the harvester thresher chaff removal system comprising a frame, upper and lower sieve shoes and a shaker pan connected together by at least two double-arm levers and two recuperators, a drive, wherein, according to the invention, the recuperators are made in the form of a cylinder tension-compression spring and installed so that one spring end is hinged to the upper end of the double-arm lever, and the other spring end is hinged to the shaker pan bracket. The proposed chaff removal system design provides a simplified mechanism due to avoidance of damper levers, and allows to store and give up energy to the removal system drive which imparts vibration motion to the shaker pan, upper and lower sieve shoes. Lower weight of the recuperator and recuperator connection to the shaker pan and upper sieve shoe makes it possible to reduce dynamic loads on the harvester thresher frame, to reduce drive power consumption and to increase reliability.