Checking tool for height difference of tappet bottom surface

Abstract

The invention discloses a tappet bottom face height difference gauge. The gauge comprises a gauge body and a gauge stand slider. A guide groove and a tappet positioning hole are formed in the top face of the gauge body, and a tappet push-up assembly is distributed on the lower end opening of the tappet positioning hole and used for supporting and pushing up a tappet to be measured elastically from the bottom. A dial indicator head measurement groove and guide side faces are arranged at the bottom of the dial stand slider, a dial indicator mounting hole is formed in the vertical direction of the dial stand slider, a dial indicator is vertically inserted in the dial indicator mounting hole, the dial stand slider is arranged to be matched with the guide groove of the gauge body through the guide side faces at the bottom in a sliding mode, and thus the plane of the axis of the head of the dial indicator and the plane of the central plane of the axis of the tappet to be measured are the same. The gauge has the advantages that every time the measurement head is used for measurement, paths in contact with the measurement head are the same, measured data are good in repeatability, measurement results are more accurate, and measurement efficiency is high.

Description

technical field [0001] The invention relates to the field of detection of geometric characteristic items of tappet products in the manufacture of internal combustion engines, in particular to a height difference check tool for tappet bottom surfaces. Background technique [0002] For the inspection of the geometric characteristics of internal combustion engine tappet products, it is difficult to detect the height difference distance items at the bottom of the tappet, mainly because the bottom working surface of the tappet is a spherical surface, and it is difficult to establish measurement conditions. Usually use a vernier caliper (change the probe type if necessary) or use a profiler and a three-coordinate machine for measurement. Due to the low accuracy of the vernier caliper, the measurement results are controversial when measuring the distance between the spherical arc surface and the edge at the bottom of the tappet. When measuring with a profiler and a three-coordinat...

AI Technical Summary

Problems solved by technology

Due to the low accuracy of the vernier caliper, when measuring the distance between the spherical arc surface and the edge at the bottom of the tappet, the measurement results are controversial

Using a profiler and a three-coordinate machine to measure, there will be difficulties in positioning and determining the reference plane, and the data repeatability is poor, the measurement time is too long, the efficiency is low, and the measurement cost is high

The existence of this contradiction is not conducive to the quality control of internal combustion engine tappet products

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