Running direction
Child parent shuttle car: The child parent shuttle car system is mainly composed of parent car and child car. The primary trolley runs on the track, usually along the direction of the roadway (longitudinal), and can transport the secondary trolley to the roadway location. The secondary trolley itself can also carry out limited lateral movement on the platform provided by the primary trolley, which is mainly used for cargo access operation. Its overall running direction is relatively fixed, mainly in the roadway and the limited range perpendicular to it.
Four way shuttle car: As its name suggests, the four-way shuttle car can run in four directions, that is, it can move forward and backward longitudinally along the roadway, and it can also move laterally left and right between roadways, and it can also lift and lower goods in the vertical direction (matching with appropriate lifting equipment). This multidirectional operation capability greatly enhances the flexibility of the four-way shuttle in the warehouse shelf system.
Cargo access mode
Shuttle car: when goods are accessed, the primary car first transports the secondary car to the target roadway, and then the secondary car drives from the primary car platform into the rack roadway to complete the access of goods. In this way, the shuttle bus system needs to go through two actions of the main bus and the secondary bus when it accesses goods, which is relatively complicated. However, this double-layer structure can effectively use space and improve storage density.
Four way shuttle car: the four-way shuttle car can reach the target cargo location directly through its own operation, and operate directly at the rack location where goods need to be accessed. Its action is more direct, it can quickly respond to cargo access requests, reduce the intermediate transshipment link, and has obvious advantages in some scenarios requiring high cargo access efficiency.
Applicable scenarios and warehouse layout
Shuttle car: It is more suitable for warehouses with high storage density requirements, large batch of goods and strong regularity of goods in and out of the warehouse. Its system can be optimized according to the roadway layout of the warehouse to store a large number of goods in a limited space. It is usually suitable for large logistics or industrial warehouses.
Four way shuttle: due to its high flexibility, it is more suitable for scenarios where the warehouse layout is more complex, goods are frequently delivered and warehoused, and orders are diversified. For example, in e-commerce warehouses, four-way shuttles can quickly shuttle between different shelf areas to meet the rapid access needs of small batch and multi variety goods. At the same time, it has relatively low requirements for the transformation of warehouse shelves, and can better adapt to the existing warehouse environment.
