COUPLING STRUCTURE OF ENGINE INTEGRATED TYPE HYDRAULIC PUMP

摘要

PURPOSE:To reduce the number of part items in the fitting part of a pump shaft to a rotary shaft so as to minimize a disposition space by disposing a bearing outside a coupling part in the structure of the pump shaft being coupled to the rotary shaft of an engine by an inner spline system. CONSTITUTION:In the case of an engine integrated type hydraulic pump with a hydraulic pump P1 fitted to the camshaft 1 of an engine E, an outer spline is provided in the recessed state at the periphery of the camshaft 1 and direct- coupled to a pump shaft 3 through an inner spline type coupling 4. At this time, a bearing is fittingly mounted to the periphery of the coupling 4 so as to shorten the longitudinal width of the coupling part compared to the structure of the coupling 4 and bearing 4 being disposed in a row. A movable cam plate 7 and a cylinder case 8 are then rotated by the rotation of the pump shaft 3 interlocked with the camshaft 1 to discharge positive pressure oil from the hydraulic pump P1.