The invention discloses a manual hydraulic lifting device in machining. A hydraulic pump is arranged above an oil tank and is connected to the oil tank, wherein a large hydraulic cylinder and a small hydraulic cylinder are arranged above the hydraulic pump; the small hydraulic cylinder is connected to the hydraulic pump; an opening is formed in the top of each of the large hydraulic cylinder and the small hydraulic cylinder; a positioning block is arranged between the large hydraulic cylinder and the small hydraulic cylinder and is fixed to the large hydraulic cylinder and the small hydraulic cylinder; a large piston is arranged in the large hydraulic cylinder; a support table is fixed on the top of the large piston and is arranged above the large hydraulic cylinder; a small piston is arranged in the small hydraulic cylinder; a pressing rod is arranged above the positioning block; the pressing rod is connected to a connector; the connector is fixed to the positioning block; a connection rod is arranged under the pressing rod and is respectively connected to the pressing rod and the small piston. The manual hydraulic lifting device is simple in structure, simple in principle, small in occupied area, low in cost and convenient to carry; metal parts can be lifted by using the principles of levers and hydraulic pressure; the manual hydraulic lifting device can be conveniently operated by operators.


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    Title :

    Manual hydraulic lifting device in machining


    Contributors:

    Publication date :

    2015-08-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    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



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