| 摘要 |
PROBLEM TO BE SOLVED: To provide a steering machine capable of fixing a rudder plate if an instruction to maintain a rudder plate position is issued even when feedback control of a direction of the rudder plate is not performed, and a steering gear.SOLUTION: A steering machine 16 for rotating a rudder plate by rotating a steering shaft 14 comprises: a steering lever 20; a first cylinder 26 and a second cylinder 28; a hydraulic oil supply device 24; a hydraulic circuit 25; a main valve 42 which is installed at the hydraulic circuit and switched between a connection state of connecting the first cylinder, the second cylinder, and the hydraulic oil supply device with the hydraulic circuit and a disconnection state of disconnecting the connection between the first cylinder, the second cylinder, and the hydraulic oil supply device with the hydraulic circuit, and cutting off a hydraulic oil to the first cylinder and second cylinder side; and a switch control unit 44 for switching the main valve between the connection state and the disconnection state. The switch control unit does not perform feedback control corresponding to the position of the rudder plate, and switches the main valve to the disconnection state when the rudder plate is detected to be in a fixed state.SELECTED DRAWING: Figure 2 |
