AGRICULTURAL WORK VEHICLE

• Main Authors: NOGAMI RYOHEI, HORI YASUHIKO, IDE KENICHI, YAMAGUCHI YUJI, OZAKI SHINSUKE
• Format: Patent
• Language: English; Japanese
• Published: 09.05.2016
• Subjects: LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

PROBLEM TO BE SOLVED: To solve a problem in which an agricultural work vehicle cannot turn in a small radius when an auxiliary transmission operation tool is operated toward a high speed side because a four-wheel steering mode cannot be selected even if an actual running speed is low.SOLUTION: An agricultural work vehicle includes: an engine and a transmission mechanism 12 mounted on a running frame; front wheels 3 and rear wheels 4 that support the running frame and can be steered; a steering switching operation tool that is operated to switch the front wheels 3 and the rear wheels 4 between a two-wheel steering mode and a four-wheel steering mode; a controller for control; and a vehicle speed detector that detects a running speed V of the running frame. The controller automatically switches the wheels to the two-wheel steering mode if the four-wheel steering mode is performed at the running speed V detected by the vehicle speed detector that is a predetermined speed VL or more.SELECTED DRAWING: Figure 4 【課題】農作業車両において副変速操作具を高速側に操作すると、実際の走行速度が低速だったとしても四輪操舵モードを選択できず小回りが利かないという問題を解消する。【解決手段】の農作業車両は、走行機体に搭載したエンジン及び変速機構１２と、走行機体を支持し且つ操舵可能な前輪３及び後輪４と、前輪３及び後輪４を二輪操舵モードと四輪操舵モードとに切り換え操作する操舵切換操作具と、制御用のコントローラとを備える。走行機体の走行速度Ｖを検出する車速検出部材を備える。コントローラは、車速検出部材で検出した走行速度Ｖが所定速度ＶＬ以上の場合において四輪操舵モードの実行中であれば、自動的に二輪操舵モードに切り換える。【選択図】図４