To provide a work vehicle which enables a hydraulic clutch to be smoothly engaged or disengaged while curbing a shift shock.SOLUTION: A work vehicle comprises: a first hydraulic clutch installed on a first travel shaft; a second hydraulic clutch installed on the first travel shaft at a location different from the first hydraulic clutch; and a hydraulic control valve which supplies and discharges hydraulic oil to and from the first hydraulic clutch and the second hydraulic clutch. The work vehicle also has: a first gear mechanism which connects and disconnects power transmission to a second travel shaft by switching a state of the first hydraulic clutch between an engaged state and a disengaged state; a second gear mechanism which connects and disconnects power transmission to the second travel shaft by switching a state of the second hydraulic clutch between an engaged state and a disengaged state; and a control device which changes a duty ratio of control signals when switching either one of the first hydraulic clutch and the second hydraulic clutch from the engaged state to the disengaged state.SELECTED DRAWING: Figure 3A
【課題】変速ショックを抑制しつつスムーズに油圧クラッチの接続及び切断を行うことができる作業車両を提供する。【解決手段】第1走行軸に設けられた第1油圧クラッチと、第1油圧クラッチとは異なる位置で第1走行軸に設けられた第2油圧クラッチと、第1油圧クラッチ及び第2油圧クラッチへの作動油の給排を行う油圧制御弁とを備え、第1油圧クラッチの接続又は切断状態により動力を第2走行軸へ伝達又は遮断する第1ギア機構と、第2油圧クラッチの接続又は切断状態により動力を第2走行軸へ伝達又は遮断する第2ギア機構と、第1油圧クラッチ及び第2油圧クラッチのいずれか一方が接続状態から切断状態に切り換える場合に、制御信号のデューティ比を変更する制御装置と、を備えている。【選択図】図3A
WORK VEHICLE
作業車両
2021-06-17
Patent
Elektronische Ressource
Japanisch
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