The invention discloses an electric
steering system and method and a crane in the technical field of
engineering machinery, and aims to solve the problems that in the prior art, mechanical steering and hydraulic power assisting
modes are mostly adopted, large vibration exists, abnormal sound and
noise are likely to be generated, oil of a hydraulic
system is likely to be polluted, and the power assisting effect of the power assisting
system is affected. The
system comprises a front
steering system and a rear
steering system, the front steering system comprises a
steering wheel and a front axle, the
steering wheel is movably connected with an electric steering gear through a
steering column, the electric steering gear is movably connected with a steering plumbing arm, and the front axle is rotationally connected with a first wheel set and a first electric cylinder; pure
electric power assistance is adopted, the problem that a hydraulic system is difficult to avoid is solved, vibration during vehicle steering is reduced, abnormal sound and
noise are not likely to be generated, hydraulic oil is prevented from being used, hydraulic parts are prevented from being damaged, and the intelligent vehicle steering system better conforms to the development trend of intelligent vehicles.