Full-hydraulic electric stacking forklift

Abstract

The invention relates to a stacking forklift, in particular to a full-hydraulic electric stacking forklift. The full-hydraulic electric stacking forklift is mainly used for carrying, lifting and stacking goods. The invention is realized as follows: the full-hydraulic electric stacking forklift comprises a storage battery, a micro-computer controller, a motor, a hydraulic pump and a fuel tank, wherein the storage battery is a power source and provides power for a microprocessor and the motor; the motor is in driving connection with the hydraulic pump; and the hydraulic pump provides power for a hydraulic motor and an oil cylinder; and the full-hydraulic electric stacking forklift is characterized by further comprising a speed limiting valve, a forklift walking loop, a heavy-load potential energy recycling loop and a light-load potential energy releasing loop. The full-hydraulic electric stacking forklift has the advantages that only one motor, one controller and a variable displacement hydraulic system are used to implement walking, lifting, heavy-load potential energy recycling and light-load potential energy releasing of the forklift. By the combined type fuel tank, mechanical and electrical integrated oil-cooling type mounting is realized, electrical elements are not in contact with air, noises of a hydraulic system are reduced effectively, and functions of watertightness, explosion proofing and cooling are fulfilled.

Description

technical field [0001] The invention relates to a stacker, in particular to a fully hydraulic electric stacker. Background technique [0002] Most of the non-highway mobile equipment and electric engineering vehicles sold and used in the market, including stacking electric vehicles, mostly use internationally popular three-phase AC asynchronous induction motors (AC motors) for their walking, lifting and tilting devices, but these equipment and vehicles with the following defects: [0003] 1) Large starting current; [0004] 2) Large climbing current (requires 2 to 3 times the rated current); [0005] 3) AC motors have defects such as low power factor, low efficiency at low speed, and narrow high-efficiency zone of the motor; [0006] 4) The cost of imported control drives is high; [0007] 5) Potential-free regenerative feedback technology for vehicles; [0008] 6) Multiple motors start and run repeatedly at the same time, resulting in superimposed starting and running ...

AI Technical Summary

Problems solved by technology

[0003] 1) Large starting current;

[0004] 2) Large climbing current (requires 2 to 3 times the rated current);

[0005] 3) AC motors have defects such as low power factor, low efficiency at low speed, and narrow high-efficiency zone of the motor;

[0006] 4) The cost of imported control drives is high;

[0008] 6) Multiple motors start and run repeatedly at the same time, resulting in superimposed starting and running high currents, which reduces the discharge current capacity of the lead-acid battery by 40%, resulting in increased operating costs, prolonged charging time, and reduced vehicle loading and unloading efficiency;

[0009] 7) Ordinary electric forklifts control the descending speed of the goods through the throttling of the valve when the goods are dropped. The deterioration of the oil will affect the reliability and working efficiency of the hydraulic components. At the same time, the use cost will increase due to the need to replace the hydraulic oil.

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