Hydraulic jack for rapidly lifting load

Abstract

The invention relates to a hydraulic jack for rapidly lifting a load. The hydraulic jack comprises a hydraulic oil pump, wherein the hydraulic oil pump comprises an oil cylinder, a large pump, a small pump and an oil cylinder base; the larger pump is used for driving hydraulic oil into the oil cylinder; the small pump is used for driving hydraulic oil into the oil cylinder; the larger pump and the small pump are respectively fixedly connected with one side of the oil cylinder base; the oil cylinder is fixedly connected with the other side of the oil cylinder base; the oil cylinder base is provided with a first channel and a second channel; one end of the first channel is connected with one end of the second channel; the diameter of the first channel is smaller than that of the second channel; a connecting port of the first channel and the second channel is provided with a first steel ball for movably blocking the first channel and the second channel; the first channel is internally provided with a high-speed valve element for pushing the first steel ball to be separated from the connecting port of the first channel and the second channel; and the second channel is internally provided with an elastic element for providing an elastic stress for the first steel ball. When the load is smaller than a rated load, the double pumps simultaneously act, so that the jacking speed is high, the load is rapidly lifted, the work efficiency is high, the time consumption is low, and a great deal of time is saved.

Description

technical field [0001] The invention relates to a hydraulic jack for rapidly lifting a load Background technique [0002] A traditional hydraulic jack consists of a frame with front and rear wheels, on which a lifting arm, a long connecting rod, a tray, a bracket and a hydraulic oil pump for driving the lifting arm are installed, and the handle is connected to the hydraulic oil pump through a lifting handle , also includes a large pump and a small pump that inject hydraulic oil into the hydraulic oil pump, the inner cavity of the large pump and the inner cavity of the small pump are respectively connected with the hydraulic cylinder, and the large pump core and the small pump core are connected with the lift handle axially respectively. Connected, and the top end surfaces of the large and small pump cores are respectively in contact with the rollers mounted on the handle. [0003] When the jack is in the no-load lifting state, rotate the handle, and the roller presses on th...

AI Technical Summary

Problems solved by technology

[0004] When the hydraulic jack is in the load lifting state, in order to facilitate the handle operation, the oil passage connecting the inner chamber of the large pump and the hydraulic oil tank must be opened, otherwise the hydraulic oil in the inner chamber of the large and small pumps will have too much resistance to the pump cores of the large and small pumps. As a result, the handle cannot be operated, the hydraulic oil in the inner chamber of the large pump flows directly into the oil tank, the large pump core is unloaded, and only the small pump core works, the hydraulic oil in the inner cavity of the small pump enters the oil cylinder, and the oil intake is small, pushing The piston rod lifts slowly, and the piston rod pushes the heavy object to lift

[0005] Therefore, when the above-mentioned lifting method is in the load state of the jack, the jacking speed is slow, the work efficiency is low, and the time consumption is long.

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