TOWING COUPLER OF PULL-TYPE SCRAPER Russian patent published in 2009 - IPC E02F3/64 

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to towing vehicles operating with pull-type equipment. The towing coupler of the pull-type scraper consists of a ball bearing, connecting an arch-cantilevered arm of the pull-type scraper and its front axle with a pulling beam, of hydro-cylinder of hanging out connected to the arch-cantilever arm and the pulling beam by means of ball bearings, and of a hydraulic distributor. From the side opposite to a pulling beam and to the hydro-cylinder of hanging out there are installed lower and upper brackets interacting in cross plane, when wheels of the front axle are torn from soil. Also the lower bracket is rigidly connected to the front axle, while the upper bracket is connected to the arch-cantilever arm and has less rigidity, than the lower bracket. One line of the hydraulic distributor is connected to the working cavity of the hydro-cylinder of hanging out via a controlled back valve, its another line is connected to its idle cavity and to a chamber of control over the regulated back valve.

EFFECT: maximal increase of coupled weight of towing vehicle at digging due to weight of soil coming into bucket.

6 dwg