To provide a speed change control device for a hybrid vehicle which is advantageous to device downsizing and can reduce cost.
The speed change control device for the hybrid vehicle 1 includes: a first MG 11 which is connectable to a sun gear S of a planetary gear mechanism 14 provided in a power transmission path between an internal combustion engine and a driving wheel; and a second MG 12 which can output power to an output shaft 17 provided to be transmitted to a ring gear R of the planetary gear mechanism 14 via a transmission 21. The speed change control device includes a clutch mechanism 20 having a gear shifting mechanism 26 for switching gears of the transmission 21 by using rotation movement of a second sprocket 31, a connection member 39 for switching the first position where the first MG 11 is connected to the sun gear S and the second position where the first MG 11 is connected to the second sprocket 31 to be transmittable, and a shift actuator 40 for driving the connection member 39 to the first position and the second position.
Tatsuo Egami
Satoshi Nakamura