Automobile hydraulic power steering gear for preventing pin breakage

The utility model discloses an automobile hydraulic power steering gear for preventing pin breakage, and relates to an automobile steering gear, in particular to the automobile hydraulic power steering gear for preventing pin breakage. The steering gear comprises an input shaft, a valve sleeve, a fixed pin, a screw shaft, a positioning short pin and a torsion rod, and is characterized in that: the structure of the automobile hydraulic steering gear is optimally designed; the length of an end face of a baring position of an input shaft is lengthened; a T face close to a flat part of the end face of the bearing position of the input shaft and the end face of a bearing position of the screw shaft is taken as a positioning face, so that an N face of the positioning short pin and the screw shaft is positioned, flattened and changed into a gap of 0.3-0.4 mm between the positioning short pin and the screw shaft before optimal design of the structure; when the input shaft is strongly impacted by external force, the s