WINCH Russian patent published in 1995 - IPC

FIELD: load-lifting mechanisms. SUBSTANCE: winch has two friction cylindrical drums mounted in housing. Made in each drum is V-shaped ring groove with cable. Cable has load carrying and return lines in series embracing the drums and reeved in them in S-shape manner. Mounted in housing are kinematically coupled drive shafts installed concentrically relative to drums with rollers eccentrically mounted on shafts and arranged in V-shaped grooves. Rollers engage with cable and they are installed on shafts so that axes of rollers are located on perpendiculars dropped from axes of drive shafts on axis of cable between drums. Winch has crank. Axle of crank turning is installed in housing. Winch has also deflecting roller installed on crank and arranged between drums and extension spring one end of which is secured on crank, and other end, on housing. Distance between points of spring attachment is bigger than crank arm. With cable wave passing from drum to drum, roller is moved off by cable and thus compensates for required increase in cable length between drums. With cable wave passed from drum to drum, slack of cable is taken up by deflecting roller under action of spring. EFFECT: enlarged operating capabilities, enhanced reliability. 6 dwg