GB887756A - Improvements relating to hydraulically operated reversing gearing - Google Patents

Abstract

887,756. Reversing gears. DAIMLERBENZ A.G. March 8, 1960 [March 11, 1959], No. 8170/60. Class 80 (2). An hydraulically -operated reversing gear for a marine vessel comprises an input planet carrier 28 carrying intermeshed planets 29, 30 which respectively mesh an output sun 34 and ring gear 31 which latter is held by a disc brake 19 for reverse, whilst for forward ratio the planets carrier 28 is clutched at 20 to an intermediate output shaft 35. The gear-wheel sizes are selected to provide a one-to-one ratio in both forward and reverse directions. The intermediate shaft 35 drives a final driven shaft 25 through a fixed reduction gear 23, 24. The brake 19 and clutch 20 are hydraulicallyoperated and the latter may be locked engaged by screws 47 accessible through an inspection cover 48 in the casing 13. An additional hydraulically operated brake 81 for holding the driven shaft 26 has a piston 82 which engages the housing of the clutch 20 which is fast with the intermediate shaft 35. The engine flywheel is connected to the planet carrier through resilient members 14. The gear-wheel 24 is connected to a flange 71 on the shaft 25 by splines 73 and bolts 72. Input and output pumps 52, 56 of an hydraulic unit (not shown) supply pressure-liquid for operating the clutches and brakes and supply liquid through ducts 58, 59; 60, 61, 62; and 66, 78, 74, 79, 80 for lubricating the gearing and bearings. The gear housing 13 is rotatable at 27 relative to the housing 10 so that the gear may be turned relative to the engine.