lift cylinder for manual pallet jack
The lifting cylinder is the core hydraulic power component of a manual pallet truck, and its performance directly determines the lifting capacity, stability, and service life of the pallet truck. It converts mechanical energy into hydraulic energy by manually operating the handle, driving the piston rod to lift the fork frame, thereby achieving smooth lifting and lowering of heavy objects.
Core structure and working principle
Main components:
Cylinder barrel: Made of high-strength steel, with precision grinding inside, it is the cavity for piston movement and needs to withstand high pressure and sealing.
Piston assembly: includes a piston, seals (such as O-rings, Y-rings), and guide rings, responsible for forming pressure zones in the cylinder and preventing internal leakage.
Piston rod: The surface is usually plated with hard chromium, which has high smoothness and wear resistance, and is directly connected to the load to transmit thrust.
Pump core unit: including one-way valve, safety valve (overflow valve), and return valve. When operating the handle, the pump core compresses the oil to establish pressure; The safety valve opens to release pressure and protect the system when overloaded.
Oil chamber and hydraulic oil: filled with specialized high anti-wear hydraulic oil as a medium for transmitting pressure.
Work cycle:
Lifting: Repeatedly press the handle, and the pump core will hydraulic the oil into the bottom of the cylinder piston, pushing the piston rod to extend.
Pressure holding/load bearing: The internal one-way valve is locked, preventing oil from flowing back, and the piston rod remains in its current position to support the load.
Lowering: Operate the return valve (usually through a handle or foot pedal), open the oil circuit, and under load pressure, the oil flows back to the storage chamber, and the piston rod smoothly retracts.
Application scenarios and importance
Logistics warehousing: cargo loading and unloading, short distance handling, shelf storage and retrieval.
Production workshop: Material distribution and finished product stacking on the production line.
Retail and Wholesale: Organizing goods in the warehouse.
Importance: A reliable and efficient lifting cylinder can ensure safe and effortless operation, and significantly improve the efficiency of material handling, which is fundamental to ensuring the reliable operation of pallet trucks.
