A positioning fixture for the anti-opening device of the lower side door of an open wagon for maintenance

By designing a positioning fixture consisting of columns, main beams, crossbeams, and positioning pins, the problem of accurately positioning the installation location of the anti-opening device for open wagon doors was solved, achieving efficient and reliable installation and positioning, adapting to various vehicle types, and improving the efficiency and standardized operation of railway transportation.

CN224425361UActive Publication Date: 2026-06-30CRRC SHENYANG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CRRC SHENYANG CO LTD
Filing Date
2025-07-23
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In the existing technology, the installation location of the anti-opening device for open wagon doors is difficult to accurately position, resulting in low installation efficiency. Inaccurate positioning causes rework, affecting the reliability of the anti-opening device and the efficiency of railway transportation.

Method used

A positioning fixture comprising columns, main beams, crossbeams, positioning pins, and positioning plates was designed. Through the connection of outer and inner corner brackets, high-precision positioning is achieved, simplifying the operation process and ensuring the rapid installation and positioning of the anti-opening device.

Benefits of technology

It achieves millimeter-level positioning accuracy, improves the installation efficiency and reliability of anti-opening devices, shortens maintenance time, reduces costs, adapts to various train models, is suitable for large-scale maintenance and new construction scenarios, and ensures the efficiency and standardization of railway transportation.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model proposes a positioning fixture for the anti-opening device of the lower side door of an open wagon during maintenance. It includes a column, a main beam horizontally positioned at the middle left side of the column, a crossbeam horizontally positioned at the bottom right side of the column, a positioning pin on the main beam, and a positioning plate on the top of the column. The positioning pin is vertically inserted into the main beam along the front-to-back direction and fixed by a locking bolt at the left end of the main beam. The fixture features a simple structure, saves time and effort in operation, eliminates the need for complex calibration procedures, and has low cost. It can quickly complete the positioning and installation of the anti-opening device for the open wagon door, with high reliability. Compared to traditional manual measurement, it significantly reduces downtime during vehicle maintenance or modification, improves railway vehicle maintenance efficiency, and ensures freight timeliness. It is highly versatile and adaptable to multiple vehicle types. It reduces tooling replacement costs, adapts to the diversified needs of railway vehicles, and is particularly suitable for large-scale maintenance or new construction scenarios. Compared to existing processes, it achieves standardized operation and better regulates the work process.
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