Shear piezoelectric energy collection device with forked structure

By designing a shear piezoelectric energy harvesting device with a bifurcated structure, the problem of limited frequency response range is solved, and efficient energy conversion is achieved in a complex vibration environment. It has the characteristics of simple structure, high stability and strong adaptability.

CN120675438APending Publication Date: 2025-09-19SHAANXI FANRUIWEI PHOTOELECTRIC TECH CO LTD
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Patent Information

Application Number
CN202510834446.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-20
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

Existing piezoelectric energy harvesting devices have limited frequency response range, low energy conversion efficiency, and high structural complexity and manufacturing cost, making it difficult to maintain efficient energy harvesting in complex vibration environments.

Method used

A shear piezoelectric energy harvesting device with a bifurcated structure is designed. Through the symmetrically arranged bifurcated structure transmission arms, multiple force transmission paths and stiffness distributions are introduced to form a multimodal response mechanism. Multiple branch segments and flexible connections are used to optimize frequency adaptability and stability.

Benefits of technology

The frequency response range is expanded, the energy conversion efficiency and stability under broadband excitation are improved, the structure is kept simple and manufacturing-friendly, and it is suitable for micro-energy harvesting scenarios with limited space.

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Abstract

The invention relates to the technical field of piezoelectric energy collection. The invention provides a shearing piezoelectric energy collecting device with a forked structure. The shearing piezoelectric energy collecting device comprises a base, a shearing type piezoelectric unit, a supporting piece, a vibrating beam and a force transmission arm. The whole device is of a symmetrical structure relative to the middle of the vibrating beam, the vibrating beam is transversely arranged on the upper portion of the center of the device, the two ends of the vibrating beam are connected with the force transmission arms respectively, the other ends of the force transmission arms are connected to the upper surface of the bearing piece, the bearing piece is arranged on the shear type piezoelectric unit, and the shear type piezoelectric unit is arranged on the base. The force transmission arm comprises a main transmission section and a bifurcated structure, one end of the main transmission section is connected with the vibrating beam, the other end of the main transmission section is connected with the bifurcated structure, the bifurcated structure comprises a plurality of branch sections, one ends of the plurality of branch sections are converged and connected to the end part of the main transmission section, and the other ends of the plurality of branch sections are connected to different positions of the supporting sheet. According to the piezoelectric energy collecting device, the force transmission arm is arranged to be of a forked structure, multi-frequency modal linkage is achieved, the responsiveness of the piezoelectric energy collecting device is improved, and the frequency coverage range of the piezoelectric energy collecting device is widened.
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