The invention discloses a dual-mode
electric power steering gear for a heavy-duty vehicle, which comprises a steering gear shell
assembly, an input shaft and screw nut
assembly, a side cover
rocker arm shaft
assembly, an adjusting support assembly, an upper cover assembly, a sensor support plate, a corner
torque sensor, a belt transmission assembly, a planetary
reducer assembly and a motor assembly. Power is transmitted to the input shaft and screw assembly through the planetary
reducer assembly and the belt transmission assembly in sequence, the input shaft and screw nut assembly outputs torque and
angular displacement through a sector shaft and outputs power assisting torque through an input shaft, and two control
modes of angle position and torque power assisting are achieved. The scheme has the beneficial effects that according to the description of the scheme, the structure is simple, the design is reasonable,
turbine and worm structures in a heavy circulating
ball type dual-mode
electric power steering gear are replaced by the planetary
reducer, the belt gear and the like, the size is smaller, and the efficiency is improved.