초록

A continuously variable transmission for obtaining a large transmission range ratio between the input shaft and the output shaft. The transmission employs a planetary gear unit, and an engine torque is transmitted through a gear train or a V-belt transmission to the planetary gear unit.

대표청구항 ▼

A continuously variable transmission for transmitting a torque from an engine to a final reduction gear, comprising: an input shaft connected with the engine at one end thereof; a continuously variable transmission means having a driving pulley with a fixed member and a movable member, the movable m

A continuously variable transmission for transmitting a torque from an engine to a final reduction gear, comprising: an input shaft connected with the engine at one end thereof; a continuously variable transmission means having a driving pulley with a fixed member and a movable member, the movable member being actuated by an hydraulic cylinder to form a V-shaped opening between the fixed member and movable member, a driven pulley with another fixed member and another movable member, said another movable member being similarly actuated by another hydraulic cylinder to form another V-shaped opening between said another fixed member and said another movable member, and a belt member spanning the pulleys providing for a continuously variable transmission ratio; a planetary gear unit including a sun gear, a plurality of pinion gears which mesh with the sun gear and are connected with the driven pulley and a ring gear which meshes with said plurality of pinion gears; a rotation transmitting means for transmitting rotation of the input shaft to the planetary gear unit, said rotation transmitting means being provided between the input shaft and the planetary gear unit and including a shaft connected with the sun gear of said planetary gear unit and a first gear connected with the input shaft, the first gear being located between the engine and the continuously variable transmission means; a clutch means for engaging or disengaging the first gear with the driving pulley, said clutch means positioned between the first gear and the driving pulley; brake means provided between the clutch means and the driving pulley, said brake means for stopping the rotation of the continuously variable transmission means; a connection means, one side of which is connected with the ring gear of said planetary gear unit; and a differential gear means connected with another side of said connection means, said differential gear means having an output shaft, whereby when said clutch means engages the input shaft with the driving pulley, the rotation of the input shaft is transmitted through two paths to said planetary gear unit, so that the transmission ratio range of said continuously variable transmission means is enlarged and the output shaft is driven in a forward rotational direction, and when said brake means stops the rotation of the continuously variable transmission means, the rotation of the input shaft is transmitted through only one path to said planetary gear unit, so that the transmission ratio range of said continuously variable transmission is fixed and the output shaft is driven in a reverse rotational direction.