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US 12,018,750 B2Granted
Work vehicle
AssigneeKubota Corporation
InventorsTetsuo Yamaguchi, Ryoma Iwase
Life of this patent
Estimating the term…
Abstract
A work vehicle includes a restrainer vehicle speed setter to set a restrainer vehicle speed, and a switch restrainer to permit switching of the forward/backward travel switching device while a detected vehicle speed is lower than the restrainer vehicle speed and prevent switching of the forward/backward travel switching device while the detected vehicle speed is a high speed not lower than the restrainer vehicle speed.
Claims10
A work vehicle, comprising:
- an engine;
- a movable body;
- a hydrostatic, continuously variable transmission to receive motive power from the engine, vary the motive power, and output the varied motive power;
- a planetary transmission to receive the motive power from the engine and the motive power from the continuously variable transmission, composite the motive power from the engine and the motive power from the continuously variable transmission, and vary and output the composite motive power in response to the continuously variable transmission being varied;
- a forward and backward travel switching device switchable between a forward-travel power transmission state and a backward-travel power transmission state, such that, in the forward-travel power transmission state, the forward and backward travel switching device switches the composite motive power from the planetary transmission into forward-travel motive power and outputs the forward-travel motive power to move the movable body, and in the backward-travel power transmission state, the forward and backward travel switching device switches the composite motive power from the planetary transmission into backward-travel motive power and outputs the backward-travel motive power to move the movable body;
- a speed change operation tool usable to vary the continuously variable transmission;
- a forward and backward travel switching tool for use to switch the forward and backward travel switching device;
- a vehicle speed detector to detect a vehicle speed of the work vehicle;
- and
- a controller configured or programmed to define or function as:
- a restrainer vehicle speed setter to set a restrainer vehicle speed to prevent switching of the forward and backward travel switching device;
- and
- a switch restrainer to (i) permit switching of the forward and backward travel switching device while the vehicle speed detected by the vehicle speed detector is lower than the restrainer vehicle speed and (ii) prevent switching of the forward and backward travel switching device while the vehicle speed detected by the vehicle speed detector is not lower than the restrainer vehicle speed;
- wherein
- the restrainer vehicle speed setter is configured or programmed to change the restrainer vehicle speed.
12 more elements
Dependencies are inferred from the claim text.