Full-stroke adjustable oil cylinder with built-in stop valve

Abstract

The invention belongs the technical field of combinational design and manufacturing of integration of hydraulic oil cylinders for engineering machines, transport vehicles and agricultural machines and hydraulic stop valve machine liquid, and particularly relates to a total travel adjustable oil cylinder with a built-in stop valve. The total travel adjustable oil cylinder with the built-in stop valve mainly solves the technical problems that in the prior art, hydraulic oil cylinders can only be applied to adjustment of a short stroke, cannot be applied to full stroke adjustment, the total length of the oil cylinder is increased, and the production cost is high. The total travel adjustable oil cylinder with the built-in stop valve comprises a cylinder body, a piston is arranged in the cylinder body, the piston is connected with a piston rod through a locking nut, an oil inlet channel is formed in the cylinder body for being connected with an oil cavity in the oil cylinder, one end of the cylinder body is connected with the stop valve, a stop valve rod is arranged in the stop valve, a stop valve element is arranged at the inner end of the stop valve rod, the stop valve rod is connected in a stop valve end cover in a penetrating ode, an oil return channel which can be sealed by the stop valve element is formed in the stop valve, the oil return channel is connected with a rod cavity of the oil cylinder, and the exposed end of the piston rod is connected with a movable check block which can make contact with the stop valve rod.

Description

technical field [0001] The invention belongs to the technical field of combined design and manufacture of hydraulic oil cylinders for construction machinery, transportation vehicles, and agricultural machinery and hydraulic shut-off valves, and in particular relates to a full-stroke adjustable oil cylinder with a built-in shut-off valve. Background technique [0002] There are mainly three types of hydraulic cylinders with adjustable stroke. The first type is the screw adjustable type, that is, a screw is installed on the bottom of the cylinder, and one end of the screw extends into the rodless cavity inside the cylinder to offset the piston, and the other end is exposed on the cylinder. Outside the oil cylinder, the stroke of the cylinder piston is adjusted by adjusting the extension length of the screw; Easily deformed under high pressure impact. The second form is to install a hydraulic valve separately in the oil cylinder, connect the oil passage of the oil cylinder wit...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a full-stroke adjustable oil cylinder with a built-in cut-off valve, which mainly solves the problem that the hydraulic oil cylinder in the prior art can only be used for adjustment of a short stroke and cannot be adjusted for a full stroke, which increases the overall length of the oil cylinder and reduces the production cost. high cost technical issues

Images