Hydrostatically operated continuously variable transmission.

摘要

A hydrostatically operated continuo usly variable transmission for use with an engine includes a swash-plate-type axial-piston hydraulic pump (P) and a swash-plate-type axial-piston hydraulic motor (M) which are interconnected by a closed hydraulic circuit. The pump and motor cylinders (7,17) of the pump and the motor are disposed coaxially with each other and integrally coupled to each other into a cylinder block (6). An input shaft (2) connected to an engine is coupled centrally to the cylinder block, and an output tubular shaft (3) connected to a load is relatively rotatably disposed on an outer periphery of the cylinder block. The pump swash plate (10) of the pump is supported by a stationary machine frame (C). The motor swash plate of the motor is supported by the output tubular shaft.