Rotary actuator based on piezoelectric crude fibers and slider-crank mechanism and actuating method thereof

Abstract

The invention discloses a rotary actuator based on piezoelectric crude fibers and a slider-crank mechanism and an actuating method thereof. The actuator is composed of the piezoelectric crude fibers, an arc panel, pin bolts, a sliding block, a connecting rod, a flywheel, a guide rail, screws and an outer framework; the piezoelectric crude fibers are adhered to the arc panel; the two ends of the arc panel are connected with the sliding block and the guide rail respectively through the pin bolts; the two ends of the sliding block are located in the guide rail, the middle shaft is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the shaft of the flywheel; the flywheel is arranged on the outer framework; the guide rail is fixed in the outer framework by adopting the screws; the sliding block, the connecting rod and the flywheel compose the in-line slider-crank mechanism; electricity for the piezoelectric crude fibers is put through and cut off in sequence; and the piezoelectric crude fibers and the arc panel are bent and restored together to enable the sliding block to do reciprocating motion, thereby pulling the connecting rod and driving the flywheel to rotate. Therefore, outputting of rotary motion and torque is realized. The rotary actuator based on the piezoelectric crude fibers and the slider-crank mechanism disclosed by the invention has the characteristics of resistance to electromagnetic interference, continuous rotation, good flexibility and durability, small volume and light weight.

Description

technical field [0001] The invention relates to the technical field of actuators, in particular to a rotary actuator and an actuating method based on piezoelectric thick fibers and a crank-slider mechanism. Background technique [0002] Piezoelectric coarse fiber composite material-MFC (Macrofibercomposite) is a new type of piezoelectric ceramic material. Compared with traditional piezoelectric ceramics, MFC is softer, more durable, more reliable and easy to stick to the surface, and can produce large deformation, and the quality Light and thin, it has almost no effect on the quality and rigidity of the structure. Its unique electrode and piezoelectric fiber arrangement makes it have higher piezoelectric coefficient and electromechanical coupling coefficient, which can generate greater actuation force. Therefore, MFC actuators have broad application prospects in many fields such as machinery, ships, automobiles, civil engineering, and aerospace. [0003] Since the output d...

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Problems solved by technology

[0003] Since the output displacement of the traditional piezoelectric material is a micro-displacement to realize the rotary motion, multiple piezoelectric stacks are generally used for step-by-step motion or electromagnetic drive rotation, and the structure is complex and bulky.

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