A working method of a laminated piezoelectric actuator using a flexible amplified structure

Abstract

The invention discloses a laminating type piezoelectric brake adopting a flexible amplifying structure and a working method thereof. The piezoelectric brake comprises a non-rotation part, a brake support, a circular ring, a key, a brake disk and a rotating part, wherein the brake support, the circular ring, the key, the brake disk and the rotating part are installed in the non-rotation part. The circular ring is located in the non-rotation part, the inner circle of the circular ring and the brake support are connected through the key and located, and the inner circle of the brake disk and the outer circle of the circular ring are in clearance fit. The rotating part is installed on the circular ring and fixedly connected with the brake disk. The laminating type piezoelectric brake adopting the flexible amplifying structure further comprises laminating piezoelectric ceramic embedded in the circular ring, a wedge arranged on one side of the laminating piezoelectric ceramic and used for providing the pretightening force, and an isosceles triangle displacement amplifying structure used for amplifying and controlling extension displacement of the laminating piezoelectric ceramic. The laminating type piezoelectric brake adopting the flexible amplifying structure has the advantages of being small in size, easy to process, assemble and use, fast in response, easy to control and the like, and electromagnetic interference is avoided.

Description

Technical field: [0001] The invention relates to a working method of a laminated piezoelectric brake adopting a flexible amplifying structure, which belongs to piezoelectric actuators in the field of ultrasonic motors. Background technique: [0002] The friction clutch brake device is an indispensable executive mechanism in mechanical transmission, and it is required to output as large a braking torque as possible while consuming less energy and producing a small displacement. In the field of industrial brakes and automotive brakes, a large torque is usually required, and there is no specific requirement for accuracy and power consumption. Therefore, electromagnetic actuators are often used to drive the movement of the braking parts to achieve tightness and form a braking force (moment). . Due to the mechanism of electromagnetic actuation, it brings the disadvantages of relatively complex system, electromagnetic interference, and difficulty in miniaturization and control, m...

AI Technical Summary

Problems solved by technology

However, although piezoelectric ceramics can output a large thrust, the direct output displacement is very small (nanoscale), and it is difficult to be directly used to push the brake disc to achieve the braking effect.

However, the amplification effect of the ordinary mechanism is limited (up to several times), and the amplification of the order of magnitude cannot be obtained, and it is difficult to achieve a large displacement output.

In addition, the small displacement output requires extremely high brake assembly accuracy. Therefore, the previous piezoelectric brakes are only limited to ideas and concepts, and there is still a lack of feasibility for real applications.

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