Three -axis positioning structure and special fixture in special fixture

The utility model discloses a three -axis positioning structure and special fixture in special fixture, it includes: set up the casing holding tank at anchor clamps body up end, turning block, axis ofrotation, first spring to reach the upper end and be valviform Z shaft locating piece, set up at the inside second spring of Z shaft locating piece lower extreme, be used for being promoted back rebound messenger Z shaft locating piece lamella form part and open the support piece that square casing was held to the card, and set up on the fixed plate of middle part, be used for promoting the ascending arch of support piece. The utility model discloses a three -axis positioning structure makes square casing when advancing line location, only need put into the casing holding tank, makes the turning block top hold square casing one corner and can accomplish X axle and Y shaft locating, then place the anchor clamps body on the fixed plate of middle part, make protruding top hold support piece,and then the lamella form