9.5.2025 / 5 minute read

3-axis Mobile Manned Lifting Platform for Spray Painting

Project Overview

Customized 3-axis mobile manned platform for HITACHI’s painting workshops, enabling 10m horizontal (X), 5.8m vertical (Y), and 2.7m telescopic (Z) movement with 200kg payload.

ATEX-certified (II2G Ex db IIB T4 Gb) for explosive environments, installed in 9900×9600×7850mm booths (2 units/booth).

Basic Parameters

Product Model	SJG3.0-4.0
Lifting Platform Size	2000*750mm
Space Required Size	2100*850mm
Stroke Height	4000mm
Rated Load	3000kg
Equipment Self-Height	800mm (includes wheel height, four universal wheels)
Lifting Speed	2-3m/min
Overall Painting	Yellow + Black
Structure	Two Scissor Forks + Synchronous Motor + Hydraulic Pump Station + Control System
Scissor Fork Structure	Single Span, Three Layers

The Challenge

Z-axis Stability: 4.3m telescopic stroke with 200kg load risks scissor arm deflection.
Cost & Lead Time: High price/delivery of ABB Ex brakes requiring alternative solutions.
Cable Management: Large drag chain bend radius (≥200mm) for multi-cable protection.
Space Constraints: Dense equipment layout demands compact track/support design.

Solutions

Z-axis Reinforcement: Manganese steel arms + cross roller guides enhance stiffness; dual motors with encoders limit deflection to 8.6mm.
Electromagnetic Brake: ATEX-certified brakes (200N·m torque) cut costs by 40% and lead time by 50%.
Layered Drag Chains: Separated power/signal cables in 180mm bend radius chains for 500k cycles.
Modular Tracks: Pre-assembled quick-release tracks + embedded supports save 15% space.

Advantages

✅ Full Ex Safety: 12 ATEX-certified motors/switches for IIB T4 zones.
✅ Heavy & Long Reach: Z-axis 4.3m/200kg with <0.2% deflection.
✅ High Flexibility: 0-12m/min speed control, 95% coverage per unit.
✅ Easy Maintenance: Layered chains + modular tracks cut downtime by 50%.
✅ Cost-Effective: 30% savings with alternative brakes, 8-week delivery.