Low-inertia leg structure of small robot

WO2026124700A1PCT designated stage Publication Date: 2026-06-18SHENZHEN EAGLESIGHT DYNAMICS TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SHENZHEN EAGLESIGHT DYNAMICS TECHNOLOGY CO LTD
Filing Date
2026-03-31
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

In the design of legged robots, existing technologies make it difficult to simultaneously reduce the inertia of the leg end and make the drive unit arrangement compact, resulting in increased weight and energy consumption of the robot's legs, which is particularly prominent in small robots.

⚗Method used

A low-inertia small robot leg structure design is adopted. By placing the third joint motor close to the second joint motor and using only one link at the knee joint, the number of transmission mechanisms is reduced, the motor spacing and lever arm direction are optimized, and the drive unit is compactly arranged.

🎯Benefits of technology

It reduces the rotational inertia and energy consumption of the robot's legs, and improves the standby time of small robots. It is suitable for legged robots with miniaturization and lightweight requirements, especially when battery energy is limited.

✦ Generated by Eureka AI based on patent content.

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Abstract

A low-inertia leg structure of a small robot, the low-inertia leg structure comprising a first connector (1), a second connector (3) and a lower leg (10), wherein the first connector (1) is provided with a first joint electric motor (2); the first joint electric motor (2) is connected to the second connector (3), and the axis of the first joint electric motor (2) is perpendicular to that of the second connector (3); the second connector (3) is provided with a second joint electric motor (4), and an outer thigh clamping plate (5) is connected to the second joint electric motor (4); a third joint electric motor (7) is provided between the outer thigh clamping plate (5) and an inner thigh clamping plate (6); the lower leg (10) is rotationally arranged between the bottoms of the outer thigh clamping plate (5) and the inner thigh clamping plate (6) to form a knee joint; and a link (11) is rotationally connected between a part of the lower leg (10) lower than the knee joint and the third joint electric motor (7).
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