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https://www.honpine.com/products/Robot-Joint-Motor/Planetary-Joint-Motor/High-Speed-Impact-Resistance-Compact-Lightweight-Planetary-Joint-Module.html

Core Structure Composition 

● Power Unit

• Frameless torque motor: Provides compact power source, suitable for high dynamic response requirements.

• Two-stage planetary reducer: Optimizes space through nested gear structure, improves torque transmission efficiency.

● Sensing and Control

• Dual absolute encoders (motor end + output end): Supports full closed-loop control, improves positioning accuracy.

• Friction brake: Ensures emergency stop safety and zero-speed starting stability.

● Communication Module

Supports CAN bus protocol, compatible with multi-axis coordinated control.

Features

● High Torque Density and Power Performance

• Multi-stage planetary reduction structure: Through multi-stage gear combination, torque density can reach above 20N·m/kg, suitable for high-load driving requirements of robotic hip joints, legs and other parts.

   

• Peak torque output: Delivers greater peak torque output, meeting instantaneous power demands in dynamic motion scenarios.

● Impact Resistance and High Reliability

• Advantages of planetary gear transmission: Gear meshing disperses impact force, can withstand harsh working conditions such as emergency stops and high-frequency load changes, suitable for high-dynamic scenarios like bipedal robot walking and jumping.

• Mass production controllability: Planetary reducer solution has mature technology with high mass production consistency and reliability, suitable for large-scale applications.

● Compact Structure and Lightweight Design

• High integration: Nested design of planetary reducer, frameless motor, encoder and other components reduces volume by 30% compared to traditional solutions.

• Lightweight materials: Uses high-strength alloys and compact layout to meet humanoid robots' stringent requirements for lightweight and high energy efficiency.

● High Precision and Low Energy Consumption

• Low cogging torque and dual encoder closed-loop: Reduces torque ripple, combined with dual absolute encoders (motor end + output end) achieves ±0.05° repeat positioning accuracy.

• Transmission efficiency optimization: Planetary reducer transmission efficiency reaches above 80%.

● Multi-axis Coordinated Control
Supports CAN bus protocol to meet multi-degree-of-freedom coordinated motion requirements of robots.

● Economy and Maintenance Convenience

• Maintenance-free design: Stable planetary reducer structure requires no regular lubrication, reducing long-term usage costs.

• Modular interfaces: Standardized design facilitates quick replacement and upgrades, shortening robot development cycles.

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