Device and method for hoisting mandrel in inner ring hole of radial spherical plain bearing

The invention provides a device and method for hoisting a mandrel in an inner ring hole of a radial spherical plain bearing, and belongs to the technical field of installation of the mandrel in the inner ring hole of the radial spherical plain bearing. The device for hoisting the mandrel in the inner ring hole of the radial spherical plain bearing comprises a base, a joint shaft, a fixing mechanism, a micro-expanding mechanism and a fastening mechanism, a circular groove is formed in the upper end of the base, and two first sliding blocks are slidably connected to the inner wall of the circular groove; the joint shaft is arranged on the upper side of the base, and the circumferential inner wall of the joint shaft is slidably connected with an inner shaft; the micro-expanding mechanism is arranged in the inner shaft so as to realize the function of micro-expanding the inner diameter of the inner shaft; and the fastening mechanism is fixedly connected with the two second sliding blocks so that the two second sl