Micro-drive system and clamping system comprising same

Abstract

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.

Description

Technical field [0001] The invention belongs to the technical field of mechanical clamping, and specifically relates to a micro-drive system and a clamping system containing the system. Background technique [0002] At present, hydraulic or pneumatic clamping is widely used in the manufacturing industry. However, the current clamping methods have some shortcomings. For example: 1. Hydraulic clamps need to provide pressure oil pumps, pneumatic clamps need to provide compressed air compressors and drive source mechanisms Complex, high cost, large size; 2. There are many energy conversion links to provide the required clamping force, the energy loss is large, and the energy utilization rate is low; 3. There is a high-speed rotating mechanical transmission device, which causes serious noise pollution. In addition, the hydraulic device also has the problem of oil leakage and environmental pollution, which is easy to cause environmental pollution. [0003] The traditional area effect st...

AI Technical Summary

Problems solved by technology

[0006] However, there are certain defects in the traditional area effect travel amplification device

When determining the magnification, if the size of the driving piston is limited, the size of the output piston will also be fixed, and in order to place the return spring in the rod cavity, the size of the output piston rod must be sacrificed, which may cause the size of the piston rod to be too large. Small, insufficient rigidity, problems such as instability and damage of the pressure rod; on the contrary, if the rigidity of the output piston rod is guaranteed, the size of the output piston must be enlarged, and the size of the driving piston will also increase accordingly, so that the entire device is too large and the cost High, inconvenient to operate

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