Multi-degree-of-freedom bionic dexterous hand

By designing a multi-degree-of-freedom bionic dexterous hand, and using linear motors to drive the structure of each finger joint to perform complex movements, the problems of limited function and insufficient grip strength of existing bionic fingers have been solved, thereby improving dexterity and grip strength, and maintaining grip even in the event of a power outage.

WO2025232033A1 Publication Date: 2025-11-13SHENZHEN ZHAOWEI MACHINERY&ELECTRONICS CO LTD
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Patent Information

Application Number
PCT/CN2024/112726
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-05-08
Filing Date
2024-08-16
Publication Date
2025-11-13

AI Technical Summary

Technical Problem

Existing bionic fingers have five motors installed on the palm shell, with each motor connected to one of the five bionic fingers. This results in each finger only being able to bend towards the palm and unable to perform movements in other directions. This leads to limited functionality, insufficient dexterity, and insufficient grip strength.

Method used

A multi-degree-of-freedom bionic dexterous hand was designed, including a palm structure, a bionic thumb, multifunctional bionic fingers, and dexterous fingers. The finger joints are driven by linear motors to flex, swing, and rotate, achieving motion control with multiple degrees of freedom.

Benefits of technology

The bionic fingers have improved grip strength and dexterity, and can simulate a variety of human hand movements. They also have a self-locking function to ensure that they can still maintain grip in the event of a power outage, thus improving safety and functional versatility.

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Abstract

A multi-degree-of-freedom bionic dexterous hand, comprising a palm structure (1), a bionic thumb (2), a multifunctional bionic finger (3) and a dexterous bionic finger (4). The bionic thumb (2) comprises a first phalanx structure (21) and a rotary table (22), wherein the rotary table (22) is rotatably arranged on the palm structure (1), and the first phalanx structure (21) is hinged to the rotary table (22), the rotation axis of the rotary table (22) not being parallel to that of the first phalanx structure (21). The multifunctional bionic finger (3) comprises a second phalanx structure (31), wherein the second phalanx structure (31) is universally hinged to the palm structure (1), and the second phalanx structure (31) can perform flexion-extension movement and swinging movement. The dexterous bionic finger (4) comprises a third phalanx structure (41), wherein the third phalanx structure (41) is hinged to the palm structure (1), and the third phalanx structure (41) can perform flexion-extension movement.
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