Vehicle power transmission device

摘要

There is a vehicle power transmission device in which a continuously variable transmission and a gear train are provided between an input shaft and an output shaft so as to be able to transmit torque between the input shaft and the output shaft, the gear train has at least one speed ratio that cannot be set by the continuously variable transmission. In the vehicle power transmission device, a forward-reverse switching mechanism is arranged along the same axis as an axis of the input shaft, a first clutch mechanism and a brake mechanism are provided, a second clutch mechanism is provided in a first torque transmission path that is routed from the input shaft to the output shaft via the continuously variable transmission, a third clutch mechanism is provided in a second torque transmission path that is routed from the output element to the output shaft via the gear train.

主权项

1. A power transmission device for a vehicle, the power transmission device comprising:
a continuously variable transmission provided between an input shaft and an output shaft, torque output from a driving force source being input to the input shaft, the output shaft being configured to output torque, the continuously variable transmission being configured to continuously change a speed ratio; a gear train provided between the input shaft and the output shaft, the gear train having at least one speed ratio that cannot be set by the speed ratio of the continuously variable transmission, the continuously variable transmission and the gear train being configured to selectively transmit torque between the input shaft and the output shaft; a forward-reverse switching mechanism arranged along a same axis as an axis of the input shaft, the forward-reverse switching mechanism being configured to carry out differential action by using three rotating elements, the three rotating elements including an input element, an output element and a reaction element of which rotation is stopped to rotate the input element and the output element in mutually opposite directions, the input element and the output shaft being selectively coupled to each other via the continuously variable transmission, the output element and the output shaft being selectively coupled to each other via the gear train; a first clutch mechanism configured to couple at least two rotating elements among the three rotating elements; a brake mechanism configured to stop rotation of the reaction element; a second clutch mechanism configured to transmit or interrupt torque through a first torque transmission path that is routed from the input shaft to the output shaft via the continuously variable transmission; and a third clutch mechanism configured to transmit or interrupt torque through a second torque transmission path that is routed from the output element to the output shaft via the gear train, the third clutch mechanism being an intermeshing clutch.