A multi-stage double-acting oil cylinder for a hydraulic road lifter

Abstract

The invention provides a multi-stage double-acting oil cylinder of a hydraulic road lifter. In this oil cylinder, a central plunger barrel is arranged on the bottom plate, and a plurality of coaxial cylinder barrels are arranged in sequence outside the center plunger barrel. Except for the outermost cylinder barrel, the cylinder wall of each cylinder barrel Oil passages are provided, and the oil passages communicate with the oil passages; the oil inlet is also provided with a second oil inlet, and the second oil inlet is arranged on the outer wall of the outermost cylinder and passes through the outermost The cylinder wall of the outer cylinder communicates with each oil passage in turn. The invention is a multi-stage double-action lifting oil cylinder, which has a large working stroke, high working pressure and large ejection force. The three-stage oil cylinder is tested and detected; the working stroke of the oil cylinder can reach 284mm; the allowable working pressure can reach 30MPa; The gravity can reach 70 tons; and the structure is compact. When the oil cylinder is in the retracted state, the total height of the three-stage oil cylinder is only 220mm, which is easy to operate and can be used in various places including small spaces for lifting operations.

Description

technical field [0001] The invention relates to hydraulic mechanical equipment, in particular to a hydraulic road lifter, in particular to a multistage double-acting oil cylinder for a hydraulic road lifter. Background technique [0002] The hydraulic track lifter is a commonly used and necessary tool for the auxiliary adjustment and maintenance of the railway track. It can also be widely used in bridge installation, mining track transposition, and vehicles, or other equipment with low load positions. Lifting operations. At present, due to the limitations of the oil cylinder structure, the existing hydraulic road lifters generally have the following deficiencies in actual use: First, the reciprocating stroke of the plunger in the cylinder is small, and the lifting height of the jacking is often not enough. Requirements, it is necessary to carry out multiple lifts, and the work efficiency is low; the second is that in order to obtain a larger jacking height, the height of th...

AI Technical Summary

Problems solved by technology

At present, due to the limitations of the oil cylinder structure, the existing hydraulic road lifters generally have the following deficiencies in actual use: First, the reciprocating stroke of the plunger in the cylinder is small, and the lifting height of the jacking is often not enough. Requirements, it is necessary to carry out multiple lifts, and the work efficiency is low; the second is that in order to obtain a larger jacking height, the height of the hydraulic cylinder body is relatively large, and the operation is extremely inconvenient. Sometimes it is necessary to dig a heavy pit, which is labor intensive and expensive. time consuming

Images