Multi-support bidirectional piezoelectric driver

Abstract

The invention relates to a multi-support bidirectional piezoelectric driver which comprises a first piezoelectric vibrator, a second piezoelectric vibrator, a third piezoelectric vibrator, a first supporting leg, a second supporting leg, a third supporting leg, a fourth supporting leg, a first leg stand, a second leg stand, a third leg stand and a fourth leg stand, wherein the supporting legs arearranged on the lower surfaces of the piezoelectric vibrators, and the leg stands are connected to the free ends of the supporting legs. Alternating voltages can be exerted on two of the piezoelectricvibrators so that the two piezoelectric vibrators can be subjected to repeated bending deformation and the two leg stands can be driven to get close or get away, the friction force makes the leg stands and the supporting legs twisted to a certain extent, materials of different friction coefficients on the leg stands are pushed to make contact with a working face respectively, different magnitudesof displacement are generated on the leg stands, and finally the oriented movement of the driver is realized. Bidirectional driving is realized, and the driver has the advantages of being simple in structure, low in maintenance cost, low in requirement for the working face and capable of prolonging the service life of piezoelectric ceramic in the driver.

Description

technical field [0001] The invention belongs to the field of piezoelectric driving, and in particular relates to a multi-support bidirectional piezoelectric driver. Background technique [0002] The traditional drive has the characteristics of large working stroke, fast motion speed and large bearing capacity, but the traditional drive is bulky and the motion resolution is not high. With the development of modern science and technology, micro-mechanics, precision measurement and biomedicine have put forward higher requirements for micro-drivers, requiring micro-drivers to achieve small size and high precision. The new micro-actuator is mainly driven by shape memory alloy, magnetostrictive material, electrostrictive material and piezoelectric ceramic. Among them, the piezoelectric drive micro-driver has the advantages of high positioning accuracy, fast response speed, anti-electromagnetic interference, low power consumption and large driving force. The existing piezoelectric...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the structure of the current piezoelectric actuator is relatively complex, it is mostly in rigid contact with the working surface, the requirements for the working environment are high, and the easy-to-wear parts are not easy to replace, a multi-support bidirectional piezoelectric actuator is proposed, which consists of the first piezoelectric vibrator , the second piezoelectric vibrator, the third piezoelectric vibrator, the first support leg, the second support leg, the third support leg and the fourth support leg, the first foot support, the second foot support, the third foot support and the fourth foot support, wherein the first piezoelectric vibrator, the second piezoelectric vibrator and the third piezoelectric vibrator are all composed of piezoelectric sheet materials pasted on a rectangular elastic base, the first piezoelectric vibrator, The second piezoelectric vibrator is sequentially connected to the third piezoelectric vibrator, the first support leg, the second support leg, the third support leg and the fourth support leg are the same rectangular sheet member with certain elasticity, the first support leg One end of a supporting leg is arranged on the lower surface of the first piezoelectric vibrator, and the other end is a free end; one end of the second supporting leg is connected to the lower surface between the first piezoelectric vibrator and the second piezoelectric vibrator, and the other end is a free end. One end of the third support leg is connected to the lower surface between the second piezoelectric vibrator and the third piezoelectric vibrator, and the other end is a free end, and one end of the fourth support leg is connected to the lower surface of the third piezoelectric vibrator , the other end is a free end, the first foot support, the second foot support, the third foot support and the fourth foot support are cylindrical members with the same structure, size and material and are all made of low friction coefficient material and high friction coefficient material, the free ends of the four supporting legs are connected to the four-legged support and the materials with the same friction coefficient are arranged adjacent to each other

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