Pair-welding positioning tool for under-side door folding seat of open wagon maintenance

By designing a pair-welded positioning fixture for the lower side door hinge seat of open wagon maintenance, the accuracy and efficiency problems of traditional positioning methods were solved, achieving high-precision and high-efficiency positioning and installation, and ensuring the quality and safety of open wagon maintenance.

CN224508836UActive Publication Date: 2026-07-17CRRC 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
2026-07-17

AI Technical Summary

Technical Problem

The traditional positioning method for the lower side door hinge seat of open wagons suffers from low positioning accuracy, complex operation, and low efficiency, making it difficult to meet the high precision and high efficiency requirements of modern railway transportation and affecting the sealing performance and opening and closing flexibility of the lower side door.

Method used

A pair-welded positioning fixture for the lower side door hinge seat of an open wagon is adopted for maintenance. It includes a main frame, a positioning seat and a support seat, which are fixed by countersunk bolts. Combined with diagonal reinforcing ribs and spring structure, it can achieve high-precision and rapid installation and positioning.

Benefits of technology

It improves the positioning accuracy and maintenance efficiency of the lower door hinge seat, reduces the rework rate, ensures the reliability and safety of the door, reduces welding fume emissions, avoids the risk of door detachment, and achieves standardized operation and multi-model compatibility.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224508836U_ABST
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Abstract

The utility model provides a kind of gondola overhauling with lower side door folding seat pair welding positioning tool, including the main body frame being set up in rectangle, the positioning seat being set up on the upper end of main body frame left and right symmetry and the support seat being set up in the lower end of main body frame left and right symmetry;Can quickly complete gondola lower side door folding seat installation operation, improve the efficiency of gondola production and manufacture;Compatible with a variety of gondola models use;Simple structure, convenient operation, save time and labour in operation process, and cost is lower, keep the positioning accuracy of folding seat, lower side door assembly opens and closes flexibly after group welding, realize standardization operation, reduce the repair rate of lower side door assembly and lower side door folding seat, better standardize operation process;Reduce welding fume emission, avoid the risk of door falling caused by folding seat loosening simultaneously avoid the phenomenon that door falls off and tilts due to jolt in vehicle operation process, effectively improve the reliability of gondola car body and door connecting structure, and tool can be recycled.
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Claims

1. A pair-welded positioning fixture for the lower side door hinge seat of an open wagon for maintenance, characterized in that: It includes a main frame (2), positioning seats (1) symmetrically arranged on the upper part of the main frame (2) and support seats (4) symmetrically arranged on the lower part of the main frame (2). The lower ends of the two support seats (4) are respectively used to abut against the upper surface of the lower door latch seat. The two positioning seats (1) are groove-shaped structures with openings at the upper end, and can just wrap around the hinge seat from below. The center line of the positioning seat (1) on the same side coincides with that of the support seat (4).

2. The lower side door folding seat pair welding positioning tool for open wagon maintenance according to claim 1, characterized in that: The main frame (2) is a "U" shaped frame structure. The left and right ends of the main frame (2) extend upward and downward respectively to form four mounting ends for mounting the positioning seat (1) and the support seat (4). The positioning seat (1) and the support seat (4) are fixed to the main frame (2) by countersunk bolts (5).

3. The lower side door folding seat pair welding positioning tool for open wagon maintenance according to claim 1, characterized in that: The positioning seat (1) and the support seat (4) are respectively fixed to the main frame (2) by three countersunk bolts (5), and the three countersunk bolts (5) are not in a straight line.

4. The lower side door folding seat pair welding positioning tool for open wagon maintenance according to claim 2, characterized in that: The main frame (2) is provided with diagonal reinforcing ribs (3) at the connection points.

5. The lower side door folding seat pair welding positioning tool for open wagon maintenance according to claim 4, characterized in that: The main frame (2) includes two positioning beams (21) and two connecting beams (22). The upper and lower parts of the positioning beams (21) are provided with slots. The two ends of the connecting beams (22) are respectively connected to the inserts (23) that match the slots. A rectangular slide (25) is provided between the two slots on the same side. Two fixing blocks (28) are fixedly installed in the middle of the rectangular slide (25). One end of the two fixing blocks (28) is connected to each other, and the other end is connected to a first spring (29). The free ends of the first springs (29) are connected to rectangular slide plates (26). The free ends of the rectangular slide plates (26) are fixedly installed with locking blocks (27). The inserts (23) are provided with locking grooves (24) that match and engage with the locking blocks (27).

6. The pair of welding positioning tool for the under side door folding seat of the open wagon for maintenance according to claim 5, characterized in that: The rectangular slide (26) has positioning grooves (211) on both sides. A positioning block (212) is connected to the positioning groove (211) by a second spring. Positioning holes (210) that match and fit with the positioning block (212) are provided on the inner walls of both sides of the rectangular slide (25).