A hydraulic steering system, comprising a steering pump (1) and a plurality of digital steering cylinder components (2). Each digital steering cylinder component (2) comprises: a steering cylinder (21); a digital hydraulic valve (22), wherein a valve core thereof is driven by a motor (23), and the digital hydraulic valve (22) is configured to selectively enable a rodless cavity of the steering cylinder to be in communication with one of a steering valve and an oil return oilway, and enable a rod cavity of the steering cylinder to be in communication with the other one of the steering valve and the oil return oilway; a controller configured to send a digital pulse signal to the motor, so that the digital hydraulic valve moves to a first working position or a second working position; and a mechanical feedback structure connected between the steering cylinder and the valve core of the digital hydraulic valve, and configured to be driven by a piston rod of the steering cylinder when the valve core of the digital hydraulic valve moves to the first working position or the second working position, so as to drive the digital hydraulic valve to return to a neutral position. The system can improve the control precision and the response speed of the steering system.
Hydraulic steering system and mobile crane
2023-01-19
Patent
Electronic Resource
English
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |