Secondary positioner

The utility model discloses a secondary positioner, including bottom plate, carrier board, connect bottom plate and carrier board the bracing piece, a plurality of pass the motion block of carrier board and be located the bottom plate and the carrier board between cam mechanism, it places district and a plurality of quiet piece to be equipped with four on the top surface of carrier board, a plurality of motion blocks surround four and place the district, place for four and separate through the quiet piece that is the cross distribution between the district, cam mechanism is the square pushingblock module who arranges including cam plate and four of being fixed in rotary power spare on the bottom plate, connecting rotary power spare, the pushing block module week side of butt cam plate ofall rolling, and all slip the carrier board, pushing block module corresponds the district of closing on of placing and all is equipped with an at least motion block. Promote quiet clamp of motion block combination through cam