The invention provides an efficient hydraulic jack, and relates to the field of mechanical assistance devices, in particular to the efficient hydraulic jack. The efficient hydraulic jack comprises a large cylinder plunger and a pump cylinder. The large cylinder plunger is arranged in a large cylinder barrel. The lower portion of the large cylinder barrel is connected with an oil tank through a stop valve. A small cylinder plunger is arranged in the large cylinder plunger. An inner cavity of the large cylinder plunger is connected with the oil tank through a first check valve. Meanwhile, the inner cavity of the large cylinder plunger is connected with the pump cylinder through a pressure oil check valve. A piston is arranged in the pump cylinder and connected with a pressing rod. The pump cylinder is connected with the oil tank through an oil suction check valve. The efficient hydraulic jack can rapidly move at the no-load stage, time is saved, the work efficiency is improved, the bearing capacity is high, and the efficient hydraulic jack is safe and reliable.
Efficient hydraulic jack
2015-05-20
Patent
Elektronische Ressource
Englisch
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |