Work vehicle
AssigneeYanmar Co., Ltd.
InventorsTaihei Daiyakuji, Hitoshi Nomura
Life of this patent
Estimating the term…
Abstract
A work vehicle such as a tractor including an engine, a battery, a hydraulic continuously variable transmission, and an electric cylinder, and a power transmission mechanism. The hydraulic continuously variable transmission changes an output of the engine, and changes an angle of a movable swash plate to change a gear ratio thereof. The electric cylinder is driven by electric power supplied from the battery at least while the engine is stopped. With the power generated in the electric cylinder and transmitted, the power transmission mechanism changes the angle of the movable swash plate of the hydraulic continuously variable transmission.
Claims20
A work vehicle, comprising:
- an engine;
- a battery;
- a hydraulic continuously variable transmission configured to change an output of the engine, and change an inclination angle of a movable swash plate to change a gear ratio;
- an electric actuator configured to be driven by electric power supplied from the battery at least while the engine is stopped, the electric actuator arranged at a position such that:
- a first portion of the electric actuator is arranged at a position higher than a center in a vertical direction of a rear axle of a rear wheel;
- and
- a second portion of the electric actuator is arranged at a position lower than the center in the vertical direction of the rear axle of the rear wheel;
- and
- a power transmission mechanism configured to change the inclination angle of the movable swash plate of the hydraulic continuously variable transmission, by transmitting power generated by the electric actuator.
A system comprising:
- a hydraulic continuously variable transmission comprising a swash plate;
- an electric actuator coupled to the hydraulic continuously variable transmission and comprising a first portion and a second portion arranged with respect to a center of an axle in a vertical direction such that the first portion is higher and the second portion is lower than the center;
- and
- a power transmission mechanism coupled to the hydraulic continuously variable transmission and to the electric actuator, the power transmission mechanism configured to, based on power received from the electric actuator, adjust an inclination angle of the swash plate.
Dependencies are inferred from the claim text.