The invention discloses a micro-drive
system and a clamping
system comprising the micro-drive
system. The micro-drive system is based on a shape
memory effect and is driven by two
shape memory alloy rods which are mutually perpendicular, a first
shape memory alloy rod is electrified and contracts to push a drive
piston to move forwards through a transmission rod
assembly, a second
shape memory alloy rod is electrified and contracts to drive the drive
piston to reset, and at the same time, the two shape memory
alloy rods can respectively serve as a drawing power source of each other to produce plastic deformation. The clamping system comprises the micro-drive system and an internal
reflux area differential
stroke amplifying device, due to the fact that a
reflux hole is formed in an output
piston, the differential effect is achieved, the effective acting area of the output piston is made to be only the cross sectional area of a
piston rod, and therefore the amplification coefficient is improved on the basis of reduction of the size of the
stroke amplifying device. Compared with a traditional drive clamping device, the clamping system is small in size, simple in structure, good in
controllability, fewer in energy conversion steps, high in
utilization rate of energy, free of
pollution, and capable of protecting environment.