Grabbing mechanism of shaft sleeve rounder

The utility model relates to a grabbing mechanism of a shaft sleeve rounder. A grabbing driving assembly comprises a disc cam, a rotatable swing rod, a connecting rod, a driving shaft and a motor, wherein the swing rod is assembled on a rack through a rotary shaft, the two ends of the connecting rod are hinged to the swing rod and a swing frame respectively, the driving shaft is used for disc cam assembly, and the motor is in driving connection with the driving shaft. A push wheel is assembled on the swing rod in a positioning mode, the push wheel abuts against the cam face of the disc cam in a matched mode, a tensioning part used for driving the cam to be compressed on the disc cam is connected to the swing rod, the cam face of the disc cam is formed by sequentially connecting a feeding curved face, at least one reset curved face and a grabbing curved face in the rotating direction of the disc cam, the reset curved face is located between the grabbing curved face and the feeding curved face, the reset curved