A jack hydraulic system that can save labor twice

Abstract

The invention discloses a jack hydraulic system capable of saving labor twice. The jack hydraulic system capable of saving labor twice includes a handle, an operation piston cylinder, an oil tank, a lifting piston cylinder, a high-pressure oil accumulator and a hydraulic controlled check valve, the handle is hinged to a piston rod of the operation piston cylinder, the rodless cavity of the operation piston cylinder communicates with the oil tank through a first check valve, the rodless cavity of the operation piston cylinder communicates with the oil inlet of the lifting piston cylinder through a second check valve, the rodless cavity of the operation piston cylinder is connected with the hydraulic controlled opening of the hydraulic controlled check valve, the liquid inlet of the hydraulic controlled check valve communicates with the high-pressure oil accumulator, the liquid outlet of the hydraulic controlled check valve communicates with a rod cavity of the operation piston cylinder,and pressure oil is stored in the high-pressure oil accumulator. According to the jack hydraulic system capable of saving labor twice, lifting speed is not influenced while the effects of labor saving and energy saving are achieved, and meanwhile the volume of the oil tank of the system can be further reduced.

Description

technical field [0001] The invention relates to a jack hydraulic system, in particular to a jack hydraulic system which can save labor twice. Background technique [0002] The hydraulic jack has compact structure, stable operation, self-locking function, and can be carried and operated by one person, so it is widely used in factories, mines, transportation and other departments as tools for vehicle repair and other lifting and supporting tools. Labor-saving effect: the area A of the small piston 1 , the area A of the large piston 2 , The force acting on the small piston is the force F that depresses the handle 1 , the weight of the object on the large piston G, the relationship between the four is Because A 1 <A 2 , so F 1 < G, so the jack can lift heavier objects with less force, and the force required for a person to depress the handle is related to the area ratio. [0003] When lifting heavy objects, in order to ensure that the handle can still be pressed li...

AI Technical Summary

Problems solved by technology

[0003] When lifting heavy objects, in order to ensure that the handle can still be pressed lightly, a hydraulic jack is required to further save effort. According to the hydraulic working principle of the traditional jack, it is necessary to The value of is further reduced, and the movement speed v of the small piston cylinder and large piston cylinder 1 , v 2 Existence relationship This will inevitably lead to a decrease in the lifting speed of the large piston cylinder

In addition, after the lifting of the traditional hydraulic jack is completed, the oil in the large piston cylinder flows back to the oil tank, and this part of energy is wasted, and the heavier the lifted object, the more serious the energy waste

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