To provide an industrial truck steering device which can cause a hydraulic circuit to function so as to achieve manual steering even when automatic steering is possible.SOLUTION: An industrial truck steering device 100 comprises: a hydraulic pump 31; a steering cylinder 32; a circuit 40 for manual steering, which supplies hydraulic oil which is discharged from a hydraulic pump 31 through a PS valve 41 which is opened/closed according to an operation of a steering wheel 33, to the steering cylinder 32; a circuit 50 for automatic steering for supplying the hydraulic oil discharged from the hydraulic pump 31 via an electromagnetic proportional valve 51 which is opened/closed according to a calculation result of the automatic drive control, to the steering cylinder 32; and a priority valve 60 which is provided between the hydraulic pump 31 and the PS valve 41 and the electromagnetic proportional valve 51, distributes the hydraulic oil to the circuit 40 for manual steering and the circuit 50 for automatic steering, and preferentially supplies the hydraulic oil to the circuit 40 for manual steering, at a flow rate equal to or greater than a prescribed flow rate for actuating the steering cylinder 32.SELECTED DRAWING: Figure 2
【課題】自動操舵が可能な状態であっても手動操舵が可能となるように油圧回路を機能させることができる産業車両の操舵装置を提供する。【解決手段】産業車両の操舵装置100は、油圧ポンプ31と、ステアリングシリンダ32と、ステアリングホイール33の操作に応じて開閉されるPSバルブ41を介して油圧ポンプ31から吐出される作動油をステアリングシリンダ32に供給する手動操舵用回路40と、自動運転制御の演算結果に従って開閉される電磁比例弁51を介して油圧ポンプ31から吐出される作動油をステアリングシリンダ32に供給する自動操舵用回路50と、油圧ポンプ31とPSバルブ41及び電磁比例弁51との間に配設され、作動油を手動操舵用回路40と自動操舵用回路50とに分流し、ステアリングシリンダ32を作動させる所定流量以上の流量で作動油を手動操舵用回路40に優先して供給するプライオリティバルブ60と、を備える。【選択図】図2
INDUSTRIAL TRUCK STEERING DEVICE
産業車両の操舵装置
2022-10-12
Patent
Electronic Resource
Japanese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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