The invention provides a three-stage double-acting self-fitting hydraulic jack. The three-stage double-acting self-fitting hydraulic jack comprises an outer oil cylinder, a primary piston cylinder block, a secondary piston cylinder block and a tertiary piston cylinder block which are in sleeving connection coaxially sequentially, and further comprises a plurality of cylinder block inclining portions, and the cylinder block inclining portions are arranged between the outer wall of the primary piston cylinder block and the inner wall of the outer oil cylinder uniformly and between the upper wall of the primary piston cylinder block and the lower wall of the outer oil cylinder correspondingly. Each cylinder block inclining portion comprises a hollow tube sleeving a spring connectively, a solid tube is connected to the other end of the spring, and the external diameter of the solid tube is matched with the internal diameter of the hollow tube. The three-stage double-acting self-fitting hydraulic jack has the advantages that by the aid of the cylinder body inclining portions, the primary piston cylinder block achieves that the three-stage piston cylinder blocks translate along an optional direction and rotate within a specific three-dimensional space in an inclining manner under finite constraint of stainless steel segmentation blocks, so that cylinder jamming caused by the fact that the cylinder blocks deflect irregularly under the action of upper dynamic load is improved.
Three-stage double-acting self-fitting hydraulic jack
2015-06-10
Patent
Electronic Resource
English
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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