Four-Way Vehicle Rack-Haote logistics equipment

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Four-Way Vehicle Rack

A shuttle racking system, also known as a shuttle racking system or shuttle compact shelving, is a palletized high-density storage system consisting of the racking body, shuttles, a track system, lifting/conveying equipment, and a control system. The operational logic is as follows: A forklift/stallizer delivers palletized goods to a designated level at the aisle entrance; the shuttle automatically transports the pallets along the internal tracks of the racking system to an empty space deeper within the aisle; upon outbound, the shuttle automatically returns the designated pallet to the aisle entrance, where it is retrieved by a forklift/stallizer.

Function

To achieve automated storage, retrieval, and turnover of bulk goods, shuttle vehicles can automatically plan routes and work with the WMS system to complete batch outbound and bulk inbound/outbound operations, thereby improving warehousing efficiency.

Advantages

Storage Density: With no forklift lanes within the aisles, pallets are densely arranged, achieving a storage density 50%-80% higher than beam-type systems, approaching that of automated storage and retrieval systems (AS/RS).

Operational Efficiency: Shuttles operate automatically, eliminating the need for manual operation within the aisles. Forklifts only handle storage and retrieval at aisle entrances, increasing operational efficiency by 30%-50%.

Flexible Modes: Can flexibly switch between FIFO (First-In, First-Out) and FILO (Last-In, First-Out) modes to adapt to the inventory management needs of different industries.

High Safety: Reduces the frequency of forklift entry into aisles, preventing forklift collisions with racks; shuttles are equipped with anti-collision and anti-fall detection, reducing operational risks.

Strong Scalability: Can be expanded into a multi-level shuttle system, achieving full automation with stacker cranes; supports phased construction, building some aisles first and then gradually expanding.

Reduced Labor Costs: Reduces the number of forklift drivers and lowers labor intensity, especially suitable for harsh environments such as cold chain and high-temperature environments.

Components

Main Components of the Shelving System

Uprights: Q235B/Q355B steel, heavy-duty shelving-specific uprights, cross-section 120×100mm and above, core load-bearing structure, spacing designed according to aisle width and pallet size;
Beams: Welded beams/I-beams, supporting pallets and rails, deflection ≤L/250, ensuring load-bearing stability;
Cogs/Rail Support Beams: Fixing the shuttle rails, integrated with the beams, ensuring rail levelness.

Shuttle (Core Execution Component)

Frame: Aluminum alloy/steel, lightweight design, ensuring operating speed and stability;
Drive System: Servo motor + reducer, enabling the shuttle to move forward, backward, and for precise positioning;
Wheelset: Polyurethane wheels, wear-resistant, quiet, and compatible with rail operation;
Lifting Platform: Hydraulic/electric lifting, enabling pallet loading/unloading and height adjustment;
Control System: PLC + wireless communication module, receiving commands for automatic operation and obstacle avoidance.

Track System Components

Shuttle Track: C-shaped steel/rails, fixed to the rack beams. Track spacing is adapted to the shuttle's wheels. The track surface is smooth to ensure stable operation.
Track Fixing Components: Bolts/welding, securing the track to the beams to prevent track deviation.
Track End Limiters: Prevent the shuttle from derailing; a buffer device is installed to protect the equipment.

Entrance Lifting/Conveying Components

Lifter: Vertical lifting equipment to transfer shuttles and pallets between different levels; load capacity 1000-2000kg.
Conveyor Line: Roller conveyor/chain conveyor, connecting the lifter and the aisle entrance for automatic pallet transport.
Transfer Device: Enables shuttle transfer between different aisles, improving system flexibility.

Application Industries And Scope

Due to its simple structure, strong versatility, easy assembly, and low implementation cost, warehouse pallet shelves are the most commonly used storage system. They are particularly suitable for the following situations:

Food & Beverage & Cold Chain Industry (Priority for Essential Needs)

This industry generally faces pain points such as essential shelf-life/batch number management, bulk inventory preparation during peak seasons, and high cold storage rental costs. Shuttle racking is one of the best solutions to balance high density and batch control.

Pharmaceutical & Chemical Industry (Compliance Priority)

Suitable for scenarios with strict GMP/GSP or chemical warehousing standards, full pallet storage, and medium turnover, balancing compliance and storage efficiency.

Manufacturing (Production Line JIT Delivery + Finished Product Batch Storage)

Suitable for raw material/semi-finished product/finished product warehousing for batch production, full pallet flow, and requiring batch control or high-density storage, especially suitable for lean manufacturing industries such as automotive and electronics.

E-commerce & Third-Party Logistics (3PL) (Best-Selling Items + Full Pallet Contract Warehouse)

Only suitable for scenarios with few SKUs, many best-selling single items, a high proportion of full pallet shipments, and batch control requirements. Not suitable for high-frequency split-pick picking.

FAQs

Are the maintenance costs of shuttle racks high? Do they require professional maintenance?

Maintenance costs are moderate, higher than traditional shelving but lower than automated storage and retrieval systems (AS/RS). Main maintenance tasks include: ① Shuttle car lithium battery maintenance (capacity check every 1-2 years); ② Cleaning and lubrication of shuttle car wheels and rails; ③ Software upgrades and troubleshooting of the control system. It is recommended to have 1-2 dedicated maintenance personnel trained by the manufacturer, or to sign an annual maintenance agreement with the manufacturer.

Can the shuttle racking system be operated manually in the event of a power outage? How can goods be stored and retrieved in an emergency?

Manual emergency operation is supported. The shuttle is equipped with an emergency power supply (backup battery) and can be manually controlled to move pallets to the aisle entrance or exit. In the event of a complete power outage, the shuttle can be manually pushed using the emergency hand crank on the side of the rack to achieve emergency outbound delivery of goods. However, the efficiency is low (approximately 5-10 pallets per hour) and it is only suitable for emergency use.

What is the efficiency of goods storage and retrieval using shuttle racks? How many pallets can it handle per hour?

A single shuttle can handle 30-50 pallets per hour (including inbound, outbound, and relocation). If multiple shuttles are configured with elevators and conveyors, the overall efficiency can reach 80-120 pallets per hour. This efficiency is higher than drive-in racking (20-30 pallets per hour) but lower than automated storage and retrieval systems (AS/RS) (150-200 pallets per hour), making it suitable for goods with medium turnover frequency.

How many lanes can a shuttle rack support sharing one shuttle? How long does it take to switch lanes?

Typically, one shuttle car can be shared by 3-5 lanes, with switching between lanes achieved via a hoist, taking approximately 1-2 minutes. If the operation frequency is high (e.g., ≥50 accesses per hour), it is recommended to configure one shuttle car for 1-2 lanes to avoid excessively long waiting times. Some manufacturers support automatic shuttle car scheduling systems, allowing for flexible equipment allocation based on operational needs.

Is the shuttle on the shuttle rack rechargeable or wired powered? What is its battery life?

The mainstream type is the rechargeable shuttle (powered by lithium batteries), while some large-scale projects can use wired power supply via a sliding contact line. The rechargeable shuttle can last for 8-12 hours on a single charge, meeting the needs of all-day operation. It is equipped with fast charging, which can restore 80% of the battery capacity in 2 hours. It also supports automatic charging mode, allowing the shuttle to return to the charging station on its own to recharge without affecting operation.

Case Studies

Vorwerk

A leading automotive chassis and suspension system expert under the German Fowler Group, founded in 1827, with a factory in Suzhou serving major global automakers. Specializing in the R&D and production of precision suspension components, its clients include Audi, BMW, BYD, and other manufacturers of both gasoline and new energy vehicles.

Shock absorbers, springs, stabilizer bars, suspension connectors, NVH vibration absorbers, body transition components, ventilation/fluid delivery pipes, gear components, and also supplying rubber and plastic molded parts for the home appliance and electronics industries.