DEVICE TO SHIFT HOLDER OF ROOF CUTTER AND SAFETY ELEMENT FOR THIS DEVICE Russian patent published in 2014 - IPC E21C27/32 

FIELD: construction.

SUBSTANCE: device is designed for installation and operation on a body of a winning draw knife. The device to shift a holder of a roof cutter is installed as capable of regulation along the height of the roof cutter holder. The device includes a worm wheel interacting with a rack gearing available on the holder of the roof cutter, the input shaft for actuation of the worm wheel, a gear preferably arranged between the input shaft and the worm wheel and an upper board, which is equipped with a through hole for the input shaft and which is fixed on the body of the draw knife without possibility of rotation. The upper board is equipped with at least one fastening device, to which a safety element is fixed in the mounting condition without the possibility of slipping as placed onto the free end of the input shaft.

EFFECT: invention provides for the possibility of installation and disconnection of a device for shifting of a roof cutter holder by the method preventing unintentional movements of a shifted roof cutter holder.

16 cl, 5 dwg