Mechanical spring hand for measuring straightness of steel rail

By designing a flexible connection structure for the mechanical spring hand, the problem of insufficient buffering and shock absorption in existing devices was solved, enabling low-cost and efficient rail straightness measurement, and improving measurement accuracy and equipment reliability.

CN224544580UActive Publication Date: 2026-07-24CHINA RAILWAY RAILWAY TECH SERVICE GRP CO LTD
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Patent Information

Application Number
CN202521644244.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-04
Publication Date
2026-07-24
Estimated Expiration
2035-08-04

AI Technical Summary

Technical Problem

Existing rail straightness measuring devices lack buffering and shock absorption functions, are easily damaged, and have complex structures and high maintenance costs, making them difficult to promote on a large scale.

Method used

Design a mechanical spring hand that includes a robotic arm, a rotating arm, a spring hand assembly, and a flatness measuring instrument. A flexible connection between the robotic arm and the flatness measuring instrument is achieved through multiple sets of spring connectors, providing a buffering and shock absorption function to reduce the risk of equipment damage.

Benefits of technology

It enables low-cost and efficient rail straightness measurement, improves measurement accuracy and efficiency, avoids the impact of equipment collisions and vibrations on measurement results, and reduces maintenance costs.

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Abstract

The utility model discloses a mechanical spring hand for measuring the straightness of a steel rail, which relates to the field of rail transit, and comprises a mechanical arm and a straightness measuring instrument, one end of the mechanical arm is provided with a rotating arm, the rotating arm is provided with a spring hand assembly for loading the straightness measuring instrument, and the spring hand assembly is provided with a spring. The spring hand assembly comprises a connecting disc and spring connecting pieces, the connecting disc is fixedly arranged on the rotating arm, the number of the spring connecting pieces is at least two, each spring connecting piece comprises a spring and two spring seats, and the two spring seats are installed on the connecting disc and the flatness measuring instrument respectively. The two ends of the spring are connected with the two spring seats respectively, flexible connection between the mechanical arm and the straightness measuring instrument is achieved, the measuring efficiency and precision are improved, buffer transition is formed between the mechanical arm and the straightness measuring instrument through the flexible connection structure of the spring hand, and the influence of impact and vibration on the measuring result is effectively avoided.
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