The invention discloses a heightened type hydraulic trailer. The heightened type hydraulic trailer comprises an oil pump, a main piston cylinder, a main piston rod and a main trailing frame, wherein the oil pump is provided with an oil tank, the main piston cylinder is communicated with the oil pump via a first one-way valve, the main piston rod is arranged in the main piston cylinder, the main trailing frame is connected with the main piston rod, an auxiliary piston is arranged on the main trailing frame and comprises auxiliary piston cylinders and auxiliary piston rods arranged in the auxiliary piston cylinders, a reversing valve is connected between the oil pump and the first one-way valve, an oil supply pipeline with a second one-way valve is arranged between the reversing valve and the auxiliary piston cylinders, and an oil return pipeline with a control valve is arranged between the auxiliary piston cylinders and the oil tank of the oil pump. The heightened type hydraulic trailer has the advantages that by the aid of the auxiliary piston which is capable of ascending optionally on the surface of the trailing frame, the integral lifting height of the hydraulic trailer can be extended, a working plane of the heightened type hydraulic trailer is free from the limit of lifting height of a traditional hydraulic trailer, and application fields of the heightened type hydraulic trailer are increased.
Heightened type hydraulic trailer
2015-07-01
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 |
Trailer carriage capable of being heightened automatically
Europäisches Patentamt | 2022
|