Electric Pallet Truck QT Series – Precision Engineering for Heavy-Duty Material Handling

Electric Pallet Truck QT Series – Precision Engineering for Heavy-Duty Material Handling

The QT series electric pallet truck integrates a 90mm reinforced one-piece fork carriage with fully automated robotic welding and a lithium-ion battery equipped with real-time Battery Management System (BMS) monitoring. The power unit motor delivers 20% gradeability unloaded and 6% under full load. Rated load capacity reaches 2,500kg with a 600mm load center. Travel speed is 5.5 km/h unloaded and 4.2 km/h loaded.

Power Unit Motor – Core Drive Performance

The DC brushless power unit motor serves as the core drive装置, converting electrical energy into mechanical energy to propel the truck. It delivers 3.5kW continuous output with peak torque of 28 Nm. Encapsulated windings and sealed bearings enable operation from -10°C to 45°C without derating. The motor drives the transmission via a helical gearbox achieving 92% mechanical efficiency. Thermal sensors in stator windings trigger gradual power reduction at 120°C to prevent magnet demagnetization during extended ramp climbs.

One-Piece Fork Construction – 90mm Reinforced Steel

The fork is fabricated from single-piece high-tensile steel with a base thickness of 90mm at the heel, tapering strategically toward the tip to reduce weight while maintaining bending strength. The fork carriage integrates seamlessly with the load backrest using interference-fit mounting pins, eliminating play after thousands of lifting cycles. The reinforced heel plate distributes point loads evenly, reducing floor pressure by 18% compared to standard forged forks.

Fully Automated Robotic Welding

The entire mast and fork assembly undergoes fully automated MIG welding with precision-controlled heat input. This eliminates manual weld inconsistencies, resulting in uniform seam penetration and spatter-free surfaces. Reinforced gussets at high-stress junctions increase torsional rigidity by 22%. The one-piece construction ties the overhead guard, battery compartment, and drive unit into a single rigid frame.

Lithium-Ion Battery with Intelligent BMS

The lithium iron phosphate (LFP) battery pack incorporates a dedicated Battery Management System that monitors cell voltage, temperature, and state of charge across individual cells. The BMS actively balances cells during charging and disables output when detecting over-current or short-circuit conditions. Charging is auto-regulated to CC-CV profile, extending cycle life beyond 3,500 charges. A Bluetooth module transmits real-time data to fleet management software for predictive maintenance alerts.

Ergonomic Handle with Butterfly Switch Control

The contoured grip handle is molded from high-durability engineering plastic with soft-touch overmolding. Thumb controls including directional rocker switch, horn, and creep-speed button fall within natural finger reach. The handle's vertical adjustment range accommodates operators from 155cm to 195cm in height. A built-in dampening mechanism reduces wrist strain during prolonged shuttling operations. The tiller arm returns to vertical position automatically when released, engaging the electromagnetic parking brake.

Technical Specifications

Structural Integrity and Durability

The one-piece fork construction with 90mm thickened steel reinforcement eliminates additional bolts or weak joints, increasing bending resistance and torsional rigidity. The automatic welding process delivers consistent penetration depth and smooth surface transitions, reducing stress concentration points that commonly lead to metal fatigue in conventional assembled forks. Every main frame and fork joint undergoes fully automated CO₂ shielded arc welding, ensuring consistent heat input and minimal spatter. Weld strength exceeds the base metal tensile requirements.

Operational Benefits

Operators benefit from reduced physical effort through the ergonomic handle design and butterfly switch accelerator. The 90mm reinforced fork section provides extra margin when handling heavy or offset loads. The intelligent BMS extends cycle life by actively balancing cells and preventing overcharge or deep discharge. The lithium-ion battery eliminates routine maintenance and water filling. These features make the QT series suitable for warehouses, distribution centers, and production floors where uptime and maneuverability directly impact productivity.