Motor-driven seal circulation liquid push rod

Abstract

The invention discloses a motor-driven seal circulation liquid push rod which comprises an electromotor, an oil chamber, a maintenance port, an oil chamber feeding device, a support, an oil cylinder and a fork head, wherein the electromotor is installed on the oil chamber, the oil chamber is provided with the maintenance port, the oil chamber feeding device is arranged in the oil chamber, the support is arranged on the external of the oil chamber, the oil cylinder is connected with the oil chamber, a piston and a piston rod are arranged in the oil cylinder, and the fork head is installed on the piston rod. According to the motor-driven seal circulation liquid push rod, when the push rod works, a feeding chamber can achieve feeding through increasing or decreasing of the volume of a corresponding air bag along with increasing or decreasing of the volume of air in the oil chamber, not only is pressure loss avoided, but also entrance of dust and impurities in the external world is prevented, and a fully-sealed chamber is actually achieved.

Description

[0001] Technical field [0002] The invention relates to a hydraulic device, in particular to an electric sealed circulating liquid push rod. Background technique [0003] Ordinary electro-hydraulic has one of the biggest shortcomings, that is, in order to increase or decrease the liquid level of the oil cavity to have a constant pressure (no pressure difference with the outside) when the piston and piston rod are working in the cylinder, a 3mm diameter is drilled on the fuel plug Small holes allow outside air to enter. When there are impurities, water vapor, and dust in the outside air, it is easy to enter the oil cavity and mix with the hydraulic oil, causing the oil quality to deteriorate or even deteriorate. As time goes by, the seals, cylinders, and manifold valve cores are easy to wear and break down, which will cause the system pressure of the oil circuit to decrease, the oil temperature to increase, and even the system pressure to disappear. Summary of the invention [000...

AI Technical Summary

Problems solved by technology

[0003] Ordinary electro-hydraulic has one of the biggest shortcomings, that is, in order to make the liquid level of the oil chamber increase or decrease with a constant pressure (no pressure difference with the outside world) when the piston and the piston rod work in the cylinder, a 3mm diameter hole is drilled on the oil filling plug. The small hole allows the outside air to enter. When there are impurities, water vapor, and dust in the outside air, it is easy to enter the oil chamber and mix with the hydraulic oil, making the oil quality deteriorate or even deteriorate.

Over a long period of time, the seals, oil cylinders, and manifold valve cores are prone to wear and tear, causing the system pressure of the oil circuit to decrease, the oil temperature to rise, and even the system pressure to disappear.

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