11.24.2025 / 4-minute read

Rigid Chain Lifting Stage for Humanoid Robot Performance

Project Overview

Industry: Technology Exhibition & Entertainment

Application: Robotic Performance Stage System

Core Challenge: To design an ultra-smooth and rapid lifting stage specifically for humanoid robot performances, requiring absolute stability to prevent robots from falling during elevation while ensuring silent operation for indoor exhibitions.

Basic Parameters

Parameter	Specification
Stage Size	3450 × 2850 mm
Load Capacity	500 kg
Travel Height	1400 mm
Lift/Lower Time	≤ 10 seconds
Drive System	Dual Rigid Chains (XCL35R/L-1540/S)
Control System	PLC with 485 & Ethernet protocols
Structure Design	2-chain, 4-scissor configuration
Collapsed Height	≤ 480 mm

Challenge

Critical Stability Demands: Any vibration or jerking during movement could cause 35kg humanoid robots to lose balance
Rapid Scene Transitions: Required complete elevation changes within 10 seconds for dynamic performance effects
Noise Sensitivity: Needed whisper-quiet operation suitable for indoor exhibition environments
Advanced Integration: Required sophisticated control interfaces for seamless show programming

Solution

Absolute Motion Stability: The dual rigid chain drive system, combined with precision auxiliary guides, completely eliminates the jerking or vibration commonly found in conventional screw or hydraulic lifts. This ensures a perfectly smooth transition throughout the entire 1400mm travel, which is the fundamental requirement for maintaining the balance of humanoid robots.
Rapid Yet Controlled Movement: The servo motor system is precisely programmed to achieve the full elevation change within the demanding 10-second timeframe. The motion profile is carefully tuned for smooth acceleration and deceleration, avoiding any sudden movements that could destabilize the robotic performers.
Whisper-Quiet Operation: Utilizing an ultra-silent motor and a drive mechanism designed for minimal noise generation, the stage operates at remarkably low decibel levels. This is crucial for maintaining the immersive atmosphere of an indoor technology exhibition, where mechanical noise would be disruptive.
Advanced Control Integration: With built-in support for 485 and Ethernet communication protocols, the stage seamlessly integrates into a larger show control system. This allows for precise remote triggering, synchronization with lighting and music, and the creation of complex, automated performance sequences.
Space-Optimized Low Profile: The innovative 2-chain, 4-scissor configuration allows for a remarkably low collapsed height of ≤480mm. This maximizes flexibility in stage design and installation, making it ideal for permanent installations or temporary exhibitions where space is at a premium.
Redundant Safety & Reliability: The dual-chain design provides a inherent level of redundancy. The system is engineered for the high-duty cycle demands of continuous public demonstrations, ensuring long-term reliability and minimal downtime.