Double-step type pressurizing oil cylinder

Abstract

The invention provides a double-step type pressurizing oil cylinder. The double-step type pressurizing oil cylinder comprises a first piston rod assembly and a second piston rod assembly which are arranged in a cylinder barrel, the first piston rod assembly comprises a first piston and a first piston rod, the second piston assembly comprises a second piston and a second piston rod, medium-pressureoil enters a medium-pressure oil cavity through a medium-pressure oil port to push the first piston so as to push the first piston rod to extend out by a preset stroke, then high-pressure oil is input into a high-pressure oil cavity from a high-pressure oil port, the second piston is pushed to push the second piston rod, medium-pressure oil in the medium-pressure oil cavity and the first piston rod assembly to integrally advance, then the first piston rod extends out by a second preset stroke, and backpressure oil enters a backpressure oil cavity through a backpressure oil port to achieve resetting of the first preset stroke and the second preset stroke. According to the oil cylinder, the characteristic that oil cannot be compressed is used for transmitting energy, the overall energy consumption of the oil cylinder is reduced, and stability is improved.

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] A 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 it is necessary to seal the container, it is usually necessary to use a cap-making machine, and the core power component of the cap-making machine is hydraulic pressure. cylinder. [0003] Among them, the cap making machine includes a rotary compression molding cap making machine, and the oil cylinder is used to drive the opening and closing of the compression mold on the rotary compression molding cap making machine, although the number of oil cylinders used by different cap making machines Not the same (such as 24-cavity model...

AI Technical Summary

Problems solved by technology

[0006] 1) The design of the oil cylinder plug volume is too large and the piston stroke is long, resulting in a large oil consumption of the oil cylinder and high energy consumption

[0007] 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

[0008] 3) The pressure of the oil cylinder is too high when it is in a high pressure state, resulting in high energy consumption and waste

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