GB639601A - Improvements in or relating to driving units, particularly for conveyors - Google Patents

Abstract

639,601. Conveyers ; winding and paying-out apparatus. CARTER, WILKINSON, Ltd., and WILKINSON, H. A. July 28, 1947, No. 20339. [Classes 78 (i) and 78 (v)] A driving unit of the kind having the driving means contained wholly within the driving drum or like member rotatable about a fixed shaft wherein a rotary support within the drum is rotatable about the longitudinal axis of the shaft and a motor and counterpoise are mounted on the rotary support on opposite sides of the fixed shaft and the reduction gearing is operatively connected to the drum and to the motor shaft. As shown, the driving unit comprises a fixed shaft 10 and a drum 12 journalled on the shaft. A support 46 having bearings 58, 60 on the shaft carries four electric motors 36, 37, 38, 39 each armature of which 40, 41, 42, 43 is connected to reduction gearing. The stators of the motors are positioned in radial arms 48, 50 of the support by straps 52 secured by clamps to the arms so that the motors are readily removable. Each shaft of the motors extends into a gear box 63. The reduction gearing of the epicyclic type comprises two sun wheels 66, 68 connected to the shaft and end plate 18 of the drum, respectively, and meshing with planet wheels 70, 72 which are interconnected and are keyed on one of the motor shafts. The numter of teeth in the two wheels differ by the same number in the sun and planet wheels. The current is supplied by a cable 78 through slip ring gear 74 connected by bushes 75 and slip rings to the motors. The gear comprises a disc 80 fixed on the shaft carrying brush holders 82. Two motors instead of four may be used and planetary grooved pulleys geared with the grooved sun wheels by endless belts. One of the motors may be omitted together with its gearing and may be substituted by a balance weight.