A metro train taper hole gauge

By designing a tapered hole measuring tool for subway trains, using a U-shaped frame and horizontal fixed rod structure, combined with a dial indicator body and interchangeable probes, the problem of inaccurate measurement of the diameter of the central tapered hole of subway trains in existing technologies has been solved, achieving high-precision and rapid tapered hole measurement.

CN224480117UActive Publication Date: 2026-07-10申通阿尔斯通(上海)轨道交通车辆有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
申通阿尔斯通(上海)轨道交通车辆有限公司
Filing Date
2025-07-28
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing technologies, the diameter of the central conical hole cannot be accurately measured during the pressing of subway train wheelsets, and conventional measuring instruments are large in size, have high installation requirements, and take a long time to test.

Method used

A cone hole measuring tool for subway trains was designed. It adopts a U-shaped frame and a horizontal fixed rod structure, combined with a dial indicator body and interchangeable probes, to realize the measurement of cone hole diameter at multiple angles and positions. The interchangeable probes can be used to achieve different measurement ranges according to the cone hole diameter.

Benefits of technology

It achieves high-precision and rapid measurement of conical hole diameter, with simple structure and convenient operation, reducing testing costs.

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Abstract

The utility model discloses a subway train taper hole measuring tool relates to measuring instrument technical field, including U type frame and horizontal fixed link, the U type frame includes bottom bar, left side pole, right side pole, left side pole with right side pole is fixed perpendicularly installed in the left and right two ends of bottom bar, the front of left side pole with right side pole is provided with scale line, the inside both sides of horizontal fixed link all are set up with square hole. The utility model discloses the replaceable measuring head can change according to taper hole diameter, to realize the measurement switching of different range, and the distance of the axial line of dial test head and replaceable measuring head and the orifice end surface of the taper hole to be measured is consistent with the depth of the position to be measured in the taper hole. The horizontal fixed link is installed on different scale lines can check and measure the taper hole diameter of different positions, different angles, and the measurement mode is completed from the inside of taper hole, thereby has the characteristics of high detection precision, and has the characteristics of simple structure, convenient operation.
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