Full-closed multi-speed buffering driven hydraulic cylinder

Abstract

The invention relates to the field of hydraulic cylinders, and discloses a full-closed multi-speed buffering driven hydraulic cylinder comprising a cylinder body, an end cap, a piston shaft and a piston. The end cap is connected with an opening end of the cylinder body hermetically, the cylinder body is filled with hydraulic oil, the piston shaft coaxially connects two end faces of the cylinder body, and the piston sleeves the piston shaft. An inner cavity of the cylinder body is divided into multiple travel sections with different inner diameter, and the piston moves in the cylinder body and in clearance fit with the different travel sections. One end of the piston shaft is of a hollow shaft, and at least two through holes which are respectively disposed on the left and the right side of the piston are formed in the hollow shaft to realize communication between the inner cavity of the hollow shaft and the inner cavity of the cylinder body. An adjusting screw is connected to the inner cavity of the hollow shaft, and the head of the adjusting screw extends to an inner cavity of the hollow shaft to partially block the orifice of the through hole on the right side of the piston.

Description

technical field [0001] The invention relates to the field of hydraulic cylinders, in particular to a fully enclosed multi-speed buffer passive hydraulic cylinder. Background technique [0002] Oil shock absorbers are widely used in fields such as automobiles, elevators, cranes, and high-lift water pump automatic control systems for opening and closing. Hydraulic oil, the hydraulic oil is discharged from the oil discharge hole of the inner tube after being pressurized, and the hydraulic oil discharged from the inner tube is also returned to the inner tube through the oil return hole of the inner tube; when the external force disappears, the spring will bounce the piston back to the starting point and wait next action. The disadvantages of this kind of buffer are: (1) In the whole buffering and reset stroke range, the piston keeps a low speed, and the buffering speed cannot be adjusted; (2) The buffering speed is single, and the buffering speed cannot be adjusted, and ...

AI Technical Summary

Problems solved by technology

The disadvantages of this kind of buffer are: (1) In the whole buffering and reset stroke range, the piston keeps a low speed, and the buffering speed cannot be adjusted; (2) The buffering speed is single, and the buffering speed cannot be adjusted, and the buffering speed The impact force on the hydraulic cylinder is large, and it is easy to cause damage to the cylinder

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