SCRAPER SET Russian patent published in 2007 - IPC E02F3/65 E02F9/20 

FIELD: mechanical engineering; earth-moving machinery.

SUBSTANCE: proposed scraper set includes tractor connected by mount with bowl, blade system controlled by hydraulic cylinder, forced sensor and control hydraulic distributor coupled with hydraulic cylinder of blade system. Adhesion weight sensors are mounted additionally on tractor, and engine is furnished with speed sensor. Automation unit is installed on tractor to inputs of which adhesion weight sensors are connected and also speed sensor and traction force sensor, and to output of which beginning of penetration, end of penetration and beginning of lowering relays are connected, and also engine speed limiting relay. Control hydraulic distributor is provided with penetration and raising coils which are connected in parallel with supply source and in series with coils of auxiliary penetration and raising relays. Auxiliary raising relay is connected in series with raising coil, its normally-open auxiliary contacts, normally-closed auxiliary contacts of relay of end of raising and lowering are connected. Connected in parallel to auxiliary contacts of auxiliary raising relay are normally open auxiliary contacts of engine speed limiting relay and relay of beginning of raising. Connected in series with penetration coil are auxiliary penetration relay, normally-closed auxiliary contacts of relay of beginning of raising and auxiliary contacts of raising relay and also normally open auxiliary contacts of beginning of lowering relay, normally-open auxiliary contacts of auxiliary raising relay being connected in parallel to auxiliary contacts of relay pf beginning of lowering.

EFFECT: improved automation of digging process.

4 dwg