HYDRAULIC CONTINUOUSLY VARIABLE TRANSMISSION AND WORKING MACHINE VEHICLE

摘要

A hydraulic continuously variable transmission, wherein a first hydraulic device of variable displacement type operates first plungers by a plunger contact part, the output rotating part of a second hydraulic device performs a relative or a synchronous rotation relative to an input rotation by the contact thereof with second plungers, a cylinder block is rotated about the axis thereof, the first plunger chamber of the cylinder block is formed by storing the first plungers in first plunger holes and the second plunger chamber of the cylinder block is formed by storing the second plungers in second plunger holes, a closed hydraulic circuit having first and second oil chambers circulates hydraulic oil between the first and second plunger chambers, the areas where the first plunger chamber communicates with the first oil chamber and the second oil chamber while the cylinder block is rotated one turn about the axis thereof are provided and the areas where the second plunger chamber communicates with the first oil chamber and the second oil chamber while the output rotating part is rotated one turn relative to the cylinder block about the axis thereof are provided, and the stroke volume of the first hydraulic device has a range exceeding the stroke volume of the second hydraulic device.