Two-stage amplification air cylinder-driven microgripper

Abstract

The invention discloses a two-stage amplification air cylinder-driven microgripper,belongs to the technical field of microgrippers. The problem that the output displacement of an existing microgripper cannot be further increased is solved; a small air cylinder introduced for driving, and opening and closing of a jaw of the microgripper are achieved through the telescopic characteristic of a piston rod of the air cylinder, so as to further increase the output displacement of the microgripper; and on the other hand, aiming at the problems of nonlinear characteristic, small output force, short service life, difficulty in controlling thermal expansion amount and the like of an existing driver, the small air cylinder as the driver does not have the defects. The microgripper comprises an air pump, wherein the air pump is connected with an air cylinder through an electromagnetic valve; a precise pressure reducing valve is arranged between the air pump and the electromagnetic valve, and the precise pressure reducing valve is further connected with a digital pressure sensor; a piston rod of the air cylinder is fixedly connected with an input end of a bridge amplifier, and two output ends of the bridge amplifier are connected with corresponding clamping arms through support rods separately; and a whole set of pressure regulating system is formed, and the bite force of the jaw is accurately controlled by regulating the pressure value. The two-stage amplification air cylinder-driven microgripper is applied to micron-scale part operation.

Description

technical field [0001] The invention belongs to the technical field of micro-clamps, and in particular relates to a micro-clamp driven by a secondary amplifying cylinder. Background technique [0002] Micro-grippers are tools for manipulating micron-scale parts. The output displacement of traditional micro-grippers cannot be further improved. At present, commonly used drivers in the field of micro-manipulation include piezoelectric drivers, electrostatic drivers, electrothermal drivers, and shape memory alloy drivers. The disadvantages are as follows: [0003] The piezoelectric driver has the advantages of small size, large output force, and high sensitivity; however, the input and output of the piezoelectric driver itself have nonlinear characteristics, mainly hysteresis and creep; [0004] Electrostatic actuators were introduced into microelectromechanical systems earlier and have a wide range of applications; however, the output force of electrostatic actuators is small, ...

AI Technical Summary

Problems solved by technology

[0009] The beneficial effects of the present invention are as follows: Aiming at the problem that the output displacement of the existing micro-clamp cannot be further improved, a small cylinder is introduced as a driver, and the jaws of the micro-clamp can be opened and closed through the expansion and contraction characteristics of the cylinder piston rod, and the bridge-type amplifier The two-stage amplification with the clamp arm further improves its output displacement and can drive the expansion of the jaws

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