Four-way shuttles (or simply four-way shuttles) work in conjunction with reciprocating elevators to complete tasks on different levels and within different aisles of the warehouse, according to mission requirements. Under the control and scheduling of the Warehouse Control System (WCS), multiple shuttles can operate simultaneously across multiple levels. Each four-way shuttle can upload information such as location, speed, battery level, inventory status, malfunctions, and operational status to the information management system. The four-way shuttles have functions such as bulk storage and retrieval, reversing and moving goods, and pallet counting, enabling rapid material retrieval and inventory management. They are equipped with obstacle avoidance and fault alarm functions for safety protection and timely feedback of fault information. From a hardware perspective, the four-way shuttle mainly consists of a frame, lifting mechanism, drive mechanism, wheel set, power supply, and electrical control components.

Four-Way Vehicle Parameters

Lifting Mechanism: Mechanical Lifting

Travel Drive: Two-way four-wheel drive, 16 wheels

Travel Speed: 1.8m/s

Reversal Time: ≤3S

Positioning Method: High-definition camera + barcode

Operation Method: Online/Semi-automatic/Manual

Key Technologies

·Mechanical Lifting (Chainless Drive, All Gearbox Drive)

·Travel Drive (Chainless Drive, All Gearbox Drive)

·Communication between Stacker Crane and Host Computer: WIFI Communication

·Battery Temperature and Current Monitoring for Safety

·Fast Charging Station: Equipped with Temperature Control Sensor + Fire Extinguishing Device

Operation Method: Online/Semi-automatic/Manual

Key Technologies

· Vector frequency conversion control, S-curve stepless speed control

· Frequency conversion (or servo) speed regulation, laser or barcode addressing

· Optical communication between the stacker crane and the host computer

· Double mechanical and electrical safety features

· Multiple control modes: manual, semi-automatic, stand-alone automatic, and online automatic