Gauge for radial run-out of inner bore walls at two ends of hollow shaft

Abstract

The invention discloses a gauge for radial run-out of inner bore walls at two ends of a hollow shaft. The gauge comprises a foundation bed, a fixed bracket and a movable bracket, wherein one end of the foundation bed is fixedly connected with the fixed bracket; the movable bracket is positioned and arranged at the other end of the foundation bed by virtue of three longitudinal slots which are parallel to one another and upwards open. An adjustable positioning structure which consists of a movable tip, a shaft sleeve, a spring and a fan-shaped gear is assembled on the top of the movable bracket. The tip arranged on the top of the fixed bracket at the other end of the foundation bed is coaxial with the movable tip in the movable bracket. A dial indicator arranged on the fixed bracket is positioned on the side surface of the tip, and the axes of the dial indicator and the fixed bracket are parallel to one another. According to the gauge for radial run-out of inner bore walls at the two ends of the hollow shaft, the groove is formed in one surface, facing towards one end of the workpiece, of the tip, and an angle-shaped measuring head inserted to the groove is in hinged connection by virtue of a pin roll, the radial side of the angle-shaped measuring rod in fixed-axis swinging is pulled by a tension spring on the fixed bracket, so that the contact point of the axial side is lean against the inner bore wall of the workpiece, and the linked radial side position changes are quantitatively displayed by the contacted dial indicator. The gauge for the radial run-out of the inner bore walls at the two ends of the hollow shaft is simple in structure, simple and convenient to operate, and especially suitable for quality detection on a production site.

Description

Technical field [0001] The invention relates to a checking tool for measuring the processing quality of the inner hole of a mechanical part. Specifically, the invention relates to a checking tool for measuring the radial runout of the inner hole wall at both ends of a hollow shaft. Background technique [0002] Hollow shaft is a common mechanical part, and the design datum and measurement datum of this kind of parts are the central axis according to the convention. Under the conditions of the prior art equipment, by coaxially supporting the inner holes at both ends of the hollow shaft, the length and the radial runout of each part of the outer wall of the hollow shaft can be accurately measured. In reality, the hollow shafts of many equipment are equipped with two inner holes for positioning and mounting accessories. Therefore, this type of shaft hole has both dimensional tolerance and form tolerance requirements. When such parts are tested, the inner holes at both ends are block...

AI Technical Summary

Problems solved by technology

At present, there is no general-purpose measuring tool on the market that can be directly used for on-line inspection at the production site. Due to the lack of such inspection, it has seriously restricted the industrialization process of high-precision parts in my country's automobile manufacturing industry.

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