Driver and driving method

Abstract

The invention provides a driver and a driving method. The driver comprises a driving module, a transmission module, an elastic element, an output shaft and a base module. The driving module comprises a piezoelectric stack and a displacement amplification mechanism; the displacement amplification mechanism comprises a horizontal moving end which linearly moves back and forth along with the telescopic deformation of the piezoelectric stack, a fixed end which is static relative to the piezoelectric stack, and a vertical moving end which moves up and down along with the telescopic deformation of the piezoelectric stack; the transmission module is used for converting linear motion of the displacement amplification mechanism into rotary motion of the output shaft and comprises a tooth column, a tooth cover and a tooth cylinder. The lower end of the output shaft penetrates through a supporting shaft on the base module and extends out of the base module; the output shaft is rotationally mounted on the base module; the elastic element sleeves the outer side of the lower section of the tooth cylinder and is placed between the upper section of the tooth cylinder and the base module; in each periodic voltage signal, the elastic element is in a compressed state. The motor can be miniaturized, and is high in driving precision, large in output torque and long in service life.

Description

technical field [0001] The invention belongs to the field of micro-rotary mechanical power drive, and in particular relates to a driver and a driving method. Background technique [0002] With the rapid development of electronic information and mechanical science, especially with the continuous penetration and integration of materials science, microelectronics, automatic control theory, precision manufacturing technology and other disciplines, the society presents diversified and personalized needs. Industrial products are constantly developing towards miniaturization and intelligence, and miniaturization and miniaturization have become a hot issue in people's research, and put forward higher requirements for performance indicators such as driving accuracy, output torque and service life. [0003] In the prior art, because the piezoelectric stack will produce linear micro-deformation after applying an electrical signal, the drivers using the single piezoelectric stack as the...

AI Technical Summary

Problems solved by technology

However, due to the surface contact between the amplifying mechanism and the rotor of the above-mentioned driver and a certain pre-tightening force, after a long time of operation, the contact surface will be worn due to friction, which will gradually reduce the rotation accuracy of the driver and even cause the motor to stall due to slipping between the amplifying mechanism and the rotor.

Rotary drives that work on the principle of inertial impact have strict requirements on the drive signal in terms of control, and the control system is relatively complicated.

As a result, there are defects such as serious wear caused by slipping or stalling between the stator and rotor, low driving precision, high energy consumption, small output torque, and short service life.

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