Internal-drive internal indirect feedback type digital hydraulic cylinder structure

A digital hydraulic and feedback technology, which is applied in the field of hydraulic cylinders, can solve problems such as demanding machining accuracy, difficult production of ball screws, and difficult realization of long strokes, so as to ensure smooth flow, fast speed, and small overall structural size.

Inactive Publication Date: 2018-09-14
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 h

Method used

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  • Internal-drive internal indirect feedback type digital hydraulic cylinder structure
  • Internal-drive internal indirect feedback type digital hydraulic cylinder structure
  • Internal-drive internal indirect feedback type digital hydraulic cylinder structure

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Example Embodiment

[0029] The present invention will be further described below in conjunction with the accompanying drawings of the specification.

[0030] Such as Figure 1~3 As shown, an internal drive internal indirect feedback type digital hydraulic cylinder of the present invention includes: a cylinder block 6, a hollow piston rod 8, a large lead spiral body 11, a valve core 18, a valve body 20 and a stepping motor 15, wherein the hollow piston The rod 8 is slidably installed in the cylinder block 6. The valve body 20 is installed on the rear end cover 12 of the cylinder block and is coaxially connected with the cylinder block 6. The valve core 18 is arranged in the valve body 20, and one end of the valve core 18 is connected to the large lead The spiral body 11 is coaxially rotating and connected. The large lead spiral body 11 enters the hollow cavity of the hollow piston rod 8 through the cylinder rear end cover 12 and the cylinder back cavity 10. The end of the hollow piston rod 8 and the ...

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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...

Claims

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Application Information

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IPC IPC(8): F15B15/14F15B15/20
CPCF15B15/14F15B15/202
Inventor 李海洋谢里阳赵丙峰李冲张诗健赵志强宋佳昕
Owner NORTHEASTERN UNIV
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