Detecting tool for detecting rocker arm motion avoiding plane of irregular cavity of cylinder cover

Abstract

The invention relates to a detecting tool for detecting a rocker arm motion avoiding plane of an irregular cavity of a cylinder cover. The detecting tool comprises a detecting block and a cylindrical positioning mandrel, wherein the detecting block is fixedly connected to the upper part of the positioning mandrel; the positioning mandrel is inserted into a tappet hole of the cylinder cover to position the detecting tool; the diameter of the positioning mandrel is basically as same as that of the tappet hole of the cylinder cover; the positioning mandrel and the tappet h9ole are in clearance fit; the detecting block is used for detecting the rocker arm motion avoiding plane which is milled in the cylinder cover and is provided with a limiting reference surface at the lower part, and an upper depth detecting surface as well as a thickness detecting surface at the upper part. The detecting tool is simple to operate, has low requests on skills of a person, is fast in detecting speed, can obviously improve production efficiency and is low in cost.

Description

technical field [0001] The invention relates to a testing tool for automobile parts, in particular to a testing tool for detecting a special-shaped cavity of a cylinder head. Background technique [0002] The cylinder head belongs to the gas distribution mechanism of the internal combustion engine. It is mainly used to close the upper part of the cylinder, form the combustion chamber, and serve as the support for the camshaft and the intake and exhaust pipes. [0003] see figure 1 , figure 2 , the rocker arm movement area in the engine cylinder head 7 is a curved surface shape of sand casting, and the size of the cast cylinder head is neither stable nor regular, especially the cam journal 71 where the camshaft is installed on the cylinder head 7 and the rocker arm cylinder. The tappet holes 72 are adjacent to each other, and the two sidewalls of the cam journal 71 are curved surfaces, which are easy to interfere with the active area of ​​the rocker arm. In order to ensur...

AI Technical Summary

Problems solved by technology

However, since the standard functional gauge is a regular-shaped and easy-to-manufacture inspection tool, while the cylinder head cavity and the rocker arm movement area are shaped cavities, it is difficult to measure with the existing standard functional gauge. Therefore, a holographic scanning instrument is generally used However, the use of holographic scanning equipment for detecti

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