HYDRAULIC CIRCUIT STRUCTURE FOR CONTINUOUSLY VARIABLE TRANSMISSION

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic circuit structure for continuously variable transmissions that can lower the manufacturing cost of hydraulic circuits by virtue of simplification thereof, and can improve the control response of changeover mechanisms by virtue of a shortened length of the path of the hydraulic circuits. SOLUTION: A flange portion 8a of a housing member 8 is fixedly positioned on a mounting portion 1a of a casing 1. The housing member 8 in combination with a support member 9 stores a forward/reverse changeover mechanism 6. An oil groove 34 defined in the flange portion 8a interconnects an oil passage 32 connected to a supply source of working fluid and oil passages 35 and 36 connected to a cylinder 38 for a hydraulic piston 31. The oil groove 34 is stopped by the periphery of the support member 9. The series of steps define a hydraulic circuit extending from the supply source of working fluid to the hydraulic piston 31.