PLANETARY GEAR DEVICE AND OPERATION MECHANISM FOR CONTINUOUSLY VARIABLE TRANSMISSION, ENHANCING QUALITY BY ENABLING DRIVER TO OBTAIN DESIRED ACCELERATING FEELING THROUGH ACHIEVEMENT OF KICK DOWN FUNCTION

摘要

PURPOSE: A planetary gear device and an operation mechanism for a continuously variable transmission are provided to achieve a kick down function by rapidly lowering a transmission gear ratio in desired time in hardware. CONSTITUTION: A planetary gear device and an operation mechanism for a continuously variable transmission comprises a stepped pinion(PN) in which a large diameter part and a small diameter part are integrally formed on a concentric shaft; a ring gear(R) engaged with the stepped pinion and connected to an output shaft; a first sun gear(S1) engaged with the large diameter part of the stepped pinion; a second sun gear(S2) engaged with the small diameter part of the stepped pinion; a first clutch(C1) and a third clutch(C3) changing the power transmission state of an input shaft and the first sun gear; a one-way clutch(F1) installed between the first clutch and the first sun gear; a second clutch(C2) changing the power transmission state of an input shaft of the second sun gear; a first brake(B1) fixing a carrier of the stepped pinion; and a fourth clutch(C4) changing a state of connecting the carrier of the stepped pinion to the ring gear.