The invention discloses a symmetric spatial three-dimensional
micro manipulator with a three-stage motion amplifying mechanism. The
micro manipulator is small in size, compact in structure, stable andreliable in clamping force and high in movement precision. The
micro manipulator is composed of a base and a plurality of amplification clamping modules, wherein each amplification clamping module comprises a piezoelectric
ceramic driver, a
bridge type displacement amplification mechanism, two lever displacement amplification mechanisms, a Z-
shaped beam displacement amplification mechanism, two flexible guide mechanisms and a clamping jaw; the piezoelectric
ceramic driver is arranged between the base and the movable end of the
bridge type displacement amplification mechanism; and the piezoelectric
ceramic driver drives the movable end of the
bridge type displacement amplification mechanism, the output end of the bridge type displacement amplification mechanism drives the input ends of thelever displacement amplification mechanisms, the output end of each lever displacement amplification mechanism drives the input end of the Z-
shaped beam displacement amplification mechanism, and theoutput end of the Z-
shaped beam displacement amplification mechanism is fixedly connected with the clamping jaw. The micro
manipulator is compact in structure, stable and reliable in clamping force, low in cost and high in movement precision.