Patent ID: 6564954
Filing Date: 2003-05-20
Classification: B66C,B66D

Abstract:
A rope hoist comprising:a frame including a frame base and first and second frame heads, said first and second frame heads being secured to said base in outwardly extending parallel relation to each other, a gearbox having an output shaft rotatably supported by bearings, a motor having a motor shaft operatively coupled to said gearbox for rotatably driving said output shaft, a rope drum supported between said first and second frame heads for relative rotational movement, said rope drum having one end coupled to said gearbox output shaft and another end supported within a bearing member mounted on said second frame head, said first and second frame heads each comprising a substantially flat plate portion extending in cantilever fashion from said frame base without transversely extending rigidifying structure, said flat cantilever extending plate portions providing a torsionally non-rigid elastic support for said drum that absorbs relative movement between said gearbox output shaft support bearings and said bearing member and movement caused by alignment errors between said output shaft and bearing member.