PULL-AND-BRAKE WINCH FOR MOUNTING CONTACT WIRE Russian patent published in 2003 - IPC

FIELD: railway transport; contact systems of railways. SUBSTANCE: invention relates to lifting and transportation facilities, particularly to winches which can be used in contact wire mounting. Proposed winch contains frame, detachable load shaft for drum and drive with hydraulic control system secured on frame. Output shaft of drive is provided with quick-release connection with detachable shaft. According to invention, bearing supports are mounted on load shaft and are suspended by means of quick-release joints from vertical telescopic tie-rods secured on upper part of frame and fixed relative to direction of winding off of cable by two longitudinal and one cross tie-rods hinge-coupled with frame and with suspended supports. Drive is made in form of two-step reduction gear whose output step is planetary gear train, and first step is gear train with idler gear and input gear coupled with shaft of reversible hydraulic motor and with drum of disk brake. Hydraulic system contains self-contained pumping station with high-pressure filter, safety valve and tank, and also manometer for checking tension of cable, overflow valve to adjust and maintain preset tension, overflow valve to maintain backpressure at hydraulic motor input, check valve to provide reversing of hydraulic motor and three position six-way hydraulic distributor with unloading valve. EFFECT: simplified design. 2 cl, 4 dwg