Compound type pressurizing oil cylinder

Abstract

The invention provides a compound type pressurizing oil cylinder. The compound type pressurizing oil cylinder comprises a piston rod assembly, the piston rod assembly comprises an inner rod and an external piston rod arranged on the inner rod in a sleeving mode, medium-pressure oil enters a medium-pressure oil port and enters a medium-pressure oil cavity through a medium-pressure oil way passageway formed by the axis of the inner rod, and then the external piston rod is pushed to advance by a first preset stroke. After the first preset stroke is completed, high-pressure oil enters a high-pressure oil cavity through a high-pressure oil port, directly acts on a piston and pushes the piston to advance, and therefore the external piston rod continues to advance by a second preset stroke; and meanwhile, the medium-pressure oil cavity keeps continuous input of medium-pressure oil, and the die assembly pressure is medium pressure plus high pressure. After die assembly is completed, the process is switched to oil return, medium pressure and high pressure are cut off, back-pressure oil is provided for a back-pressure oil port, and therefore resetting, namely descending resetting of the oilcylinder, of the first preset stroke and the second preset stroke is achieved. The compound pressurizing oil cylinder has the effects of reducing energy consumption, improving the stability of the oilcylinder, reducing the pressure of the oil cylinder in a high-pressure state and the like.

Description

Technical field[0001]The invention relates to the technical field of hydraulic cylinders, in particular to a two-step pressurized oil cylinder.Background technique[0002]The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swing motion). This component is widely used in various fields. For example, in the field of packaging machinery and equipment, when the container needs to be sealed, it is usually necessary to use a cap making machine, and the core power component of the cap making machine is hydraulic Cylinder.[0003]The applicant of this application has found that the prior art has at least the following technical problems in the production and research and development process related to this technology for many years:[0004]Among them, the cap making machine includes a rotary compression molding cap making machine, and the rotary compression molding cap making machine will be applied to t...

AI Technical Summary

Problems solved by technology

[0007] 1) The piston area of ​​the oil cylinder is designed too large, resulting in a large amount of oil used by the oil cylinder and high energy consumption

[0008] 2) The upper and lower area ratio of the oil cylinder is too large, resulting in a large pressure difference between the upper and lower sides of the oil cylinder during operation, which indirectly leads to poor overall stability of the oil cylinder

[0009] 3) The pressure of the oil cylinder is too high when it is in a high pressure state, resulting in high energy consumption at this time

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