High Speed Impact Resistance Compact Lightweight Planetary Joint Module

●  Introduction

The Standard Planetary Joint Module is a core component of robotic power systems. Through highly integrated design combining a planetary reducer, frameless torque motor, brake, encoder, and driver, it achieves significant optimization in volume and weight, enabling precise motion control of the joint. This results in greater torque, smaller size, and lighter weight. Compared to harmonic joint modules, the planetary joint module features a smaller reduction ratio, higher output speed, and greater torque density, making it more suitable for medium-to-low load applications. We also provide customization services tailored to clients’ specific requirements.
With core advantages such as high-speed performance, impact resistance, and compact lightweight design, the Standard Planetary Joint Module has become the preferred solution for high-load drives in humanoid robots, specialized robots, logistics AGVs, and industrial automation, driving advancements in robotic performance and broader application scenarios.
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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.

Specification

Sheet 1


Rated VoltageVoltage RangePowerRated TorqueStall TorqueRated SpeedMax SpeedRated CurrentStall CurrentPhase ResistancePhase InductanceSpeed Constant
3510-824V12V-36V31W1.461205601.325.30.480.3123.53
3510-6424V12V-36V728.5466570324.20.480.312.88
4315-824V12V-36V623101202002.610.70.710.218.29
6010-824V12V-36V25251112042010.523.40.420.3417.5
6010-3624V12V-36V221184185974.69.30.550.492.02
6010-4824V12V-36V2523066207010.523.40.420.342.92
8108-824V12V-36V3367.5221103207220.670.456.67
8108-4824V12V-36V19145131.632405.320.90.670.451.11

Sheet 2


Torque ConstantPole PairsGear RatioGear BacklashMax Axial LoadMax Radial LoadNoiseIP RatingOperating Temp.Comm. ProtocolOnboard EncoderBrake Option
3510-80.3278:11575300≤60IP54-20~80°CCAN+485 Debug14bit(16384)YES
3510-642.61764:11575300≤60IP54-20~80°CCAN+485 Debug14bit(16384)YES
4315-80.96148:115125500≤60IP54-20~80°CCAN+485 Debug14bit(16384)YES
6010-80.47148:115200800≤60IP54-20~80°CCAN+485 Debug14bit(16384)YES
6010-364.681436:115250100060IP54-20~80°CCAN+485 Debug14bit(16384)YES
6010-482.801448:115250100060IP54-20~80°CCAN+485 Debug14bit(16384)YES
8108-81218:11522590060IP54-20~80°CCAN+485 Debug14bit(16384)YES
8108-488.142148:11522590060IP54-20~80°CCAN+485 Debug14bit(16384)YES