Recirculating ball type steering gear

The invention discloses a recirculating ball type steering gear and belongs to the technical field of steering gear equipment.The recirculating ball type steering gear comprises a shell, a screw rod, a nut, a sector gear and a rocker arm, the screw rod is rotationally connected with the shell, the nut is in threaded connection with the screw rod, and the nut is in sliding connection with the shell through a guide structure; the guide structure is used for guiding the nut to move in the axial direction of the screw, the sector gear is fixedly connected with the rocker arm and hinged to the shell, a gear is arranged on the outer wall of the nut and meshed with the sector gear, and a circulating pipe is arranged on the nut and used for connecting a section of threaded channel between the nut and the screw end to end to form an annular closed channel. The closed channel is provided with the multiple rigid balls, the elastic balls are arranged between the adjacent rigid balls and used for separating the adjacent r