PROBLEM TO BE SOLVED: To provide a hydraulic structure for a combine which is constituted so as to actuate and control a pair of hydraulic actuators for steering a vehicle and a hydraulic lift device for lifting up and down a reaping/conveying device by pressure oil from a single auxiliary hydraulic pump body, and reducing the pressure loss of the supplemental hydraulic pump body as much as possible.SOLUTION: In the hydraulic structure, a steering valve unit for controlling hydraulic oil of the pair of the hydraulic actuators is attached to a mission case, a lifting valve unit for controlling the hydraulic oil of the hydraulic lift device from the mission case so as to be closely arranged to the hydraulic lift device, and a flow-dividing valve using stored oil in the mission case as an oil source and dividing the flow of the pressure oil from the auxiliary hydraulic pump body attached to the mission case to the pair of the hydraulic actuators and the hydraulic lift device is provided at the steering valve unit.COPYRIGHT: (C)2007,JPO&INPIT【課題】 車輌操向用の一対の油圧アクチュエータ及び刈取・搬送装置昇降用の油圧昇降装置を単一の補助油圧ポンプ本体からの圧油によって作動制御するように構成されたコンバイン用油圧構造であって、前記補助油圧ポンプ本体の圧力損失を可及的に低減させる。【解決手段】 前記一対の油圧アクチュエータの作動油制御を司る操向用バルブユニットをミッションケースに付設し、且つ、前記油圧昇降装置の作動油制御を司る昇降用バルブユニットを該油圧昇降装置に近接配置させるように前記ミッションケースから離間させると共に、前記ミッションケース内の貯留油を油源とし且つ該ミッションケースに付設された前記補助油圧ポンプ本体からの圧油を前記一対の油圧アクチュエータ及び前記油圧昇降装置へ分流させる分流弁を、前記操向用バルブユニットに設ける。【選択図】 図14
