GB1181679A - Improvements in or relating to Winches - Google Patents

Abstract

1,181,679. Hoists. VICKERS Ltd. 2 Dec., 1968 [2 Dec., 1967], No. 54942/67. Heading B8B. [Also in Division F2] A winch mounted on a frame for movement along an overhead gantry comprises a rope drum 13 housing and driven through an epicyclic gear, the latter being driven by a motor mounted on one of a pair of end plates 15 between which the drum is journalled, the end plates being supported by the frame such that one support point takes the weight of the drum and motor assembly, and a further two support points share the rope load on the drum. The end plates 15 are connected by a tube 19 which centrally mounts an eye 22 supported on a rod (23), Fig. 1 (not shown), fixed to the frame, this providing the said one support from which the drum and motor assembly depends. The other two support points comprise trunnions 24 on the plates 15 angularly spaced with regard to the axis of the drum from the tube 19, and engageable with sockets on the frame, the trunnions being in line with the rope leaving the drum surface. The drum 13 comprises two sections 29, 30 incorporating grooves for symmetrically guiding two rope falls between which the load is supported, the two sections being divided by an internally toothed annulus 35 through which the drum is driven. This annulus meshes with elongated planet pinions 42, the end sections 42A and 42C of which mesh with annuli 44 fixed stationarily relative to the drum, and one end section 42A also meshes with a sunwheel 45 carrying planet wheels 56 driven from the winch motor through an annulus 52. The planets 42 are held in place simply by the sun 45, annuli 44 and a pair of caging rings 46. The planet wheels 56 are further engaged with a sun pinion 58 drivable by a second motor mounted on the plate 15 at the opposite end to that mounting the first said motor, the sun 58 providing a creep drive for the winch drum when the first motor and hence the annulus 52 are braked.