A high-stiffness high-resolution precision lifting means

The present invention provides a high-stiffness high-resolution precision lift device belonging to the lifting device technical field. A base end surface of the present invention is fixed to the differential head X, X promote dovetail guide groove to move, and by limiting the relative movement of the dovetail guide Z-direction in the wedge converted motion to the X direction is the Z direction X of movement , countertops rises up the knife means. X, Z direction, respectively, a tension spring, is connected to the wedge X - Z and of the base to the wedge - base. Countertop during descent, return differential head is moved out of engagement with the wedge X, Z Z stretched spring pulls downward movement of the wedge, to X X tension spring pulls the wedge, and differential to re head contacts. If the work surface in an ideal work position, the peg Z tightening screws, locking the dovetail guide gib by Z, a Z stage to maintain a stable position, the knife is completed. The present invention is mainly used in ultra-precision machining precision knife.