| 摘要 |
FIELD: mechanical engineering; load-lifting facilities. SUBSTANCE: proposed load-lifting device is furnished with safeguard. Load-lifting device contains load drum on which ends of load-lifting rope are secured. Said rope is passed over equalizing and movable sheaves installed on axles and coupled with load-gripping member. Device is furnished with reduction gear on output shaft of which said load drum is mounted, input shaft of reduction gear being connected with electric motor, and is provided with lever engaging with spring and limit switch for switching off electric motor and applying the brake. Device is provided with second equalizing sheave installed on axle, and crossmember made with said lever. Equalizing sheaves are installed through their axles on crossmember to form bell-crank with different-length arms. EFFECT: improved reliability. 1 dwg |
