Duplex nutation deceleration electro-telepushrod

By combining a compound nut reducer with a lead screw and nut transmission mechanism, the motor motion is converted into linear motion of the lead screw or nut using a compound nut reducer, which solves the problem of limited load capacity of linear actuation joints and achieves high rigidity and large reduction ratio output.

CN224283373UActive Publication Date: 2026-05-26SHANGHAI JINSHUN INTELLIGENT INVESTMENT TECHNOLOGY PARTNERSHIP (LLP)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI JINSHUN INTELLIGENT INVESTMENT TECHNOLOGY PARTNERSHIP (LLP)
Filing Date
2025-08-25
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing linear actuation joints have limited load capacity, planetary roller screws have small reduction ratios and high machining accuracy, resulting in high costs, while planetary reducers suffer from backlash and low precision.

Method used

The system combines a compound nut reducer with a screw and nut transmission mechanism. The compound nut reducer converts the high-speed, low-torque motion of the motor into low-speed, high-torque motion. High-rigidity transmission and a large reduction ratio output are achieved through a parallel compound nut reducer or a self-balancing double parallel compound nut reducer and a screw and nut transmission mechanism.

Benefits of technology

It achieves high push-pull force output in a small volume, high rigidity and long stroke linear actuation, reducing costs and improving load capacity and accuracy.

✦ Generated by Eureka AI based on patent content.

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Abstract

The electro-electric actuator with compound nutation reduction is organically composed of a parallel compound nutation wheel reducer or a self-balancing double parallel compound nutation wheel reducer and a lead screw and nut transmission mechanism. Various parallel compound nutation wheel reducers with power sources convert the low-torque, high-speed rotation of their built-in motors into high-torque, low-speed rotation, which drives the lead screw or nut of the lead screw transmission mechanism. This reliably converts the oscillating motion of the compound nutation wheel into the linear reciprocating motion of the lead screw or nut. Furthermore, utilizing the symmetrical structure of the parallel compound nutation wheel reducer, a bidirectional linear actuation function is achieved through a lead screw transmission mechanism with a pair of reverse-threaded screws. This increases the actuator stroke and reduces the external load on the reducer bearings, resulting in an electro-electric actuator with characteristics such as small size, low energy loss, high rigidity, long stroke, large load capacity, and high precision.
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