Measuring tool for bearing area detection in the inner hole of the axle box

Abstract

The invention discloses a measuring tool for detecting the load-bearing area of ​​an inner hole of an axle box, which relates to the field of measurement technology. It includes a positioning sleeve that is sleeved outside a rotating sleeve through a rotating shaft; three openings are evenly distributed on the circumferential side of the positioning sleeve, and the rotating sleeve corresponds to the three openings. There is an arc-shaped groove at the position; a positioning block is installed at the arc-shaped groove, and one end of the positioning block protrudes from the opening. When the positioning sleeve and the rotating sleeve rotate relative to each other, the positioning block is driven to move outward and contact the inner hole wall of the workpiece to realize Hole center positioning; the chassis at the bottom end of the rotating shaft is fixedly connected with the rotating sleeve, the top of the rotating shaft is sleeved with a corrugated handle, and there is a ruler sleeve between the corrugated handle and the top surface of the positioning sleeve. The other end is set with a ruler frame, and a digital display meter for measuring workpieces is installed on the ruler frame. The invention can solve the problems that the existing measuring tools have large measurement errors and low efficiency, and are far from meeting the requirements for the dimensional accuracy of the distance from the center of the inner hole of the detection shaft box to the end surface of the tie rod seat.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a special measuring tool for measuring the distance from the center of the inner hole of a locomotive axle box to the end face of a tie rod seat. Background technique [0002] In the production process of the locomotive axle box, it is required to measure the distance between the center of the inner hole of the axle box and the end face of the tie rod seat, such as figure 1 As shown, there is a shaft box inner hole center diameter of Φ270mm, and the distance between the shaft box inner hole center and the end face of the tie rod seat is required to be 265±0.1mm; due to the high precision requirements of the product, the measuring tool should meet the measurement accuracy when measuring. And the repeated measurement error is between 1 / 5-1 / 3 of the workpiece tolerance. Existing measuring tools not only have large measurement errors, but also have low efficiency, which are far ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a measuring tool for measuring the load-bearing area of ​​the inner hole of the axle box. Questions about the distance dimension requirements between the end faces of the seat

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