Internal-drive internal indirect feedback type digital hydraulic cylinder structure

Abstract

The invention relates to an internal-drive internal indirect feedback type digital hydraulic cylinder structure. The internal-drive internal indirect feedback type digital hydraulic cylinder structurecomprises a cylinder body, a hollow piston rod, a large-lead spiral body, a valve element, a valve body and a stepping motor; the hollow piston rod is slidably mounted in the cylinder body, the valvebody is mounted on a cylinder body rear end cover and coaxially connected with the cylinder body, the valve element is arranged in the valve body, and one end of the valve element is coaxially and rotatably connected with the large-lead spiral body; the large-lead spiral body enters a hollow cavity of the hollow piston rod through the cylinder body rear end cover and a cylinder rear cavity; a nutis fixedly mounted at the position, at an inlet of the large-lead spiral body, of the end of the hollow piston rod, and the nut is engaged with the large-lead spiral body; and the other end of the valve element is fixedly connected with the output end of the stepping motor. The internal-drive internal indirect feedback type digital hydraulic cylinder structure has the advantages that the hydraulic cylinder stroke reaches 0.5-1.0 m or even more, the operating speed is higher, and the price is lower relatively; and through structural optimization and the layout design of the space position of oil holes, the valve structure becomes compact, and the overall structure size of a hydraulic cylinder is smaller under the situation that a certain stroke is met.

Description

technical field [0001] The invention relates to a hydraulic cylinder, in particular to an internal drive internal indirect feedback digital hydraulic cylinder structure. Background technique [0002] Digital hydraulic servo control systems have been widely used in the fields of high-end, precise and sophisticated mechanical equipment, operating mechanisms, power-assisted devices, etc., and the most representative equipment is digital hydraulic cylinders. Research and design from the perspective of mechanical principles are An important foundation of digital hydraulic servo control technology. The design and development of hydraulic components and hydraulic products in my country is gradually catching up with similar foreign advanced products, and the application of digital hydraulic cylinder products in intelligent robots is also increasing. [0003] The digital hydraulic cylinder is composed of a digital hydraulic valve and a hydraulic cylinder. Sensors and other equipment...

AI Technical Summary

Problems solved by technology

[0004] One is the slow running speed. Since the running speed of the digital hydraulic cylinder is restricted by the frequency of the pulse signal, its running speed is generally slow;

[0005] Second, long strokes are difficult to achieve. The helix structure of the more common digital hydraulic cylinders generally adopts a ball screw structure, and it is difficult to produce a ball screw with a large lead;

[0006] Third, the cost is high. Digital hydraulic cylinders are generally used in special occasions, and the processing accuracy of each key component is demanding.

Images