Patent ID: 9422949
Filing Date: 2016-08-23
CPC Classification: B66F,F15B

Claim Text:
1. An energy-recovery generation system for a handling and carrying electric vehicle, comprising: a hoisting cylinder having an output pipeline provided with a pressure sensor unit and a directional valve; the directional valve is under the control of the pressure sensor unit; a first outlet of the directional valve is connected to a tank via a multi-way valve with an operating handle; pressure oil is configured to flow out from a second outlet of the directional valve, pass through a pump having an oil suction port capable of bearing pressure or through a motor, and then pass through the multi-way valve, to finally flow back to the tank; the pump or the motor drives an electric motor to output electric energy; and an electric energy output end of the electric motor is connected to an energy storage device through a converter, the energy-recovery generation system further comprising a lifting piece handle button, a cargo lowering detection enabling signaling switch, a speed control signal potentiometer and a relay, wherein the pressure sensor unit comprises a pressure switch and a hoisting cylinder full-extension detection switch; the relay comprises a first normal open switch and a second normal open switch; the hoisting piece handle button, the cargo lowering detection enabling signaling switch, the pressure switch and a coil of the relay are connected in series to form a first control branch; the second normal open switch of the relay and a coil of an electromagnet for controlling the directional valve are connected in series to form a second control branch.