A hydraulic rotary joint, a rotary driving device mechanical arm capable of conducting oil

By improving the structural design of the hydraulic rotary joint, and adopting a two-part rotating guide with an annular semi-groove and straight pipeline design, the problems of wear and blockage were solved, enabling stable transmission and precise control of high-pressure oil that is easy to maintain, thus improving the stability and flexibility of the equipment.

CN116498821BActive Publication Date: 2026-07-21ZHEJIANG DEYAO ENERGY SAVING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG DEYAO ENERGY SAVING TECH CO LTD
Filing Date
2023-04-26
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing hydraulic rotary joints are prone to oil circuit blockage due to wear and impurity accumulation after prolonged use, making maintenance inconvenient and oil transmission unstable, which affects the service life and accuracy of the equipment.

Method used

The structure is formed by opening annular semi-grooves on the end faces of two rotating conductive parts, eliminating the internal oil passage bends. It adopts a straight pipeline and open semi-groove design, with the oil passage intersection point located on the radial end face of the component. A rotating bearing and sealing ring are installed to ensure smooth oil passage.

Benefits of technology

It facilitates maintenance and repair, reduces wear, extends equipment life, improves oil transmission stability and equipment accuracy, avoids oil leakage, and enhances the flexibility and precise control of the robotic arm.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116498821B_ABST
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Abstract

The hydraulic rotary joint can stably transmit high-pressure oil liquid between two parts of pipelines for a long time, and is convenient for maintenance, cleaning and repair. The hydraulic rotary joint comprises a first rotary conducting part and a second rotary conducting part which are in abutment with each other, a first conducting oil path which simultaneously penetrates and connects the first rotary conducting part and the second rotary conducting part, and a second conducting oil path which simultaneously penetrates and connects the first rotary conducting part and the second rotary conducting part. Independent first and second rotary conducting cavities are formed at the abutment positions of the two rotary conducting parts, so that the first conducting oil path and the second conducting oil path can keep open when the first rotary conducting part rotates relative to the second rotary conducting part around a common central axis.
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Citation Information

Patent Citations

  • High-pressure high-speed dual-path rotating joint

    CN106151739A

  • High -speed high -pressure rotary joint of multichannel

    CN206361302U

  • Dual-channel rotating joint

    CN203162409U

  • Swivel joint apparatus and method for utility supply to a rotatable building

    US20020045383A1