A rotary driving device driven by a piezoelectric ceramic motor and its application

Abstract

The invention discloses a rotary driving apparatus driven by piezoelectric ceramic motors and an application of the rotary driving apparatus, and relates to the electric rotary driving field. The rotary driving apparatus comprises a ceramic ring, a connecting shaft transitional part, a substrate ring and at least four piezoelectric ceramic motors, wherein the ceramic ring and the connecting shaft transitional part are fixedly connected; the ceramic ring and the connecting shaft transitional part are coaxially mounted with a substrate through a distance tool; a motor mounting surface is arranged on the upper surface of the substrate; the piezoelectric ceramic motors are uniformly distributed and mounted on the motor mounting surface of the substrate; and the substrate is fixed, and the piezoelectric ceramic motors drive the ceramic ring to rotate. The power of the electric rotary driving apparatus provided by the invention is supplied by the piezoelectric ceramic motors; and meanwhile, the piezoelectric ceramic motors have the advantages of low speed, high torque, high static holding torque, high response speed, small size, light weight, nano-scale resolution, no magnetic field interference and the like, so that the rotary driving apparatus has been applied in multiple fields.

Description

technical field [0001] The invention relates to the field of electric rotary drive, in particular to a rotary drive device driven by a piezoelectric ceramic motor and its application. Background technique [0002] The traditional shafting or rotating platform is generally provided by a DC motor or an AC motor to drive the torque, directly or through a reducer to drive the load to achieve rotational motion. When the torque required for load movement is large, the output torque of the system needs to be increased. There are two options: option 1, choose a motor with a large output torque to directly drive the load; option 2, add a reducer with an appropriate reduction ratio between the motor and the load to increase the output torque. [0003] However, both of the above solutions will increase the weight of the system. If the output torque of the motor is directly increased, it must be realized by increasing the weight of the motor. For traditional motors, the output torque...

AI Technical Summary

Problems solved by technology

For traditional motors, the output torque is subject to the design of key parameters of the motor, the manufacturing and assembly process of the motor, and the selection of the magnetic steel material of the motor. For a motor with a certain weight, there is a bottleneck in the output torque. It can only reach about 1N m; if a reducer is added between the motor and the load, on the one hand, it will inevitably increase the weight of the system and take up more space; on the other hand, adding a reducer will bring many problems to the system, such as reduced speed, Introduce problems such as backlash error, low transmission efficiency and limited life

[0004] For the occasions where the lightweight requirements of the system are strict, such as aviation, aerospace and some military applications, the above two solutions have great disadvantages

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