| 主权项 |
1. A continuously variable transmission comprising:
a transmission input shaft; a speed change device connected to the transmission input shaft; a continuously variable unit having a transfer shaft connected to the speed change device; and a gearbox comprising: a housing; an input member; an output member; the continuously variable unit connected to the input member; a planetary gear set having a first member, a second member, a third member, and a fourth member, wherein the second member is connected to the output member and the third member is connected to the continuously variable unit; a first torque transmitting mechanism selectively engageable to connect the third member of the planetary gear set to the first member of the planetary gear set; a second torque transmitting mechanism selectively engageable to connect the first member of the planetary gear set with the housing; and a third torque transmitting mechanism selectively engageable to connect the fourth member of the planetary gear set to the housing, and wherein selective engagement of the first torque transmitting mechanism, the second torque transmitting mechanism, and the third torque transmitting mechanism provides a high speed mode of operation, a low speed mode of operation, and a reverse speed mode of operation to the continuously variable transmission; wherein the first member is a rearward sun gear member, the second member is a carrier member, the third member is a forward sun gear member, and the fourth member is a ring gear member; and wherein the carrier member supports a set of stepped planetary gears and a set of non-stepped planetary gears, and wherein the set of stepped planetary gears each are in mesh with the rearward sun gear member, the ring gear member, and each of the non-stepped planetary gears, and wherein each of the non-stepped planetary gears are also in mesh with the forward sun gear member. |
