Double-acting combined type cylinder moving hydraulic oil cylinder suitable for minitype hydraulic machine

Abstract

The invention belongs to the related technical field of hydraulic transmission and control and discloses a double-acting combined type cylinder moving hydraulic oil cylinder suitable for a minitype hydraulic machine. The hydraulic oil cylinder comprises a cylinder body, a plunger piston, a piston rod and a piston, wherein one end of the cylinder body is formed with a working cavity, one end of theplunger piston is provided with a blind hole, the other end of the plunger piston is provided with a first oil hole communicating with the blind hole, the plunger piston is further provided with a second oil hole and a third oil hole, the second oil hole and the third oil hole are arranged around the blind hole, the second oil hole runs through the plunger piston, the third oil hole runs throughthe hole wall of the blind hole, one end of the piston rod is fixedly connected to the cylinder body, the other end of the piston rod is connected to the piston, the piston is arranged inside the blind hole, the end, away from the first oil hole, of the plunger piston is arranged inside the working cavity, and the hydraulic oil cylinder realizes pressure and speed classification by controlling oilinlet and outlet states of the first oil hole, the second oil hole and the third oil hole. The double-acting combined type cylinder moving hydraulic oil cylinder suitable for the minitype hydraulic machine can realize the pressure and speed classification and is high in practicability and simple in structure.

Description

technical field [0001] The invention belongs to the technical field related to hydraulic transmission and control, and more specifically relates to a double-acting cylinder-driven hydraulic oil cylinder suitable for a small hydraulic machine. Background technique [0002] The hydraulic cylinder is the actuator of the hydraulic machine, which is used to convert the pressure energy of the liquid into mechanical energy to drive the slider of the hydraulic machine to move and do work. Small hydraulic machines mostly use a double-acting single-piston rod hydraulic cylinder to drive the slider. The cylinder body is fixed on the machine body, and the piston rod is fixed on the slider. Liquid enters the chamber with a rod, drains liquid from the chamber without a rod, and the slider returns. Medium and large hydraulic machines mostly use a single-acting plunger hydraulic cylinder to drive the slider. The cylinder body is fixed on the body, and one end of the plunger is connected to...

AI Technical Summary

Problems solved by technology

[0003] Small hydraulic presses mostly use a single double-acting single-piston rod cylinder to work. Due to the fixed structural size of the cylinder, the pressure and speed cannot be graded when the press is working; medium and large hydraulic presses mostly use multiple single-acting plunger cylinders to work, and the control system chooses to participate The number of working cylinders is used to achieve pressure and speed classification, the structure is complex and the cost is high

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