Piston pin size detection device

The utility model provides a piston pin size detection device, its structural feature is: four linear guide place in size bottom plate both sides, and the excircle measuring mechanism is placed to the centre, four length measurement pneumatic sliding platform settle on linear guide, and the excircle measuring mechanism is driven by the sideslip cylinder, and the sideslip cylinder passes through the fixed plate and installs on the size bottom plate, size bottom plate diagonal angle is respectively installed a work piece and is differentiated the structure, differentiates the structure fix with screw on the size bottom plate through the work piece, length measurement pneumatic sliding platform is last to install the straight shank sensor through sensor fixation bases, and length measurement pneumatic sliding platform arranges respectively two inboards that a bore diameter measures and lead to rule, the limiting plate sets up two sides about the size bottom plate, the trough is installed on the size bottom plate