Measuring device for coaxiality of bearing hole in diesel engine block

Abstract

The invention discloses a diesel engine block bearing hole coaxiality measuring device comprising bearing sleeves and a mandrel. The bearing sleeves include benchmark bearing sleeves sleeved in two benchmark bearing holes respectively and a to-be-tested bearing sleeve sleeved in a to-be-tested bearing hole. The benchmark bearing sleeves are each provided with a mandrel hole of which the axis is collinear with the axis of the corresponding benchmark bearing hole, and the to-be-tested bearing sleeve is provided with a mandrel hole of which the axis is collinear with the axis of the to-be-tested bearing hole. The outer diameter of the main rod section of the mandrel is equal to the inner diameters of the mandrel holes. The diesel engine block bearing hole coaxiality measuring device provided by the invention is applied as follows: the benchmark bearing sleeves are placed in the benchmark bearing holes, the to-be-tested bearing sleeve is placed in any to-be-tested bearing hole, that the coaxiality error of the to-be-tested bearing hole is qualified is judged if the mandrel passes through the bearing sleeves smoothly, and that the coaxiality error of the to-be-tested bearing hole is not qualified is judged if the mandrel cannot pass through the bearing sleeves smoothly. With the device, the coaxiality of multiple to-be-tested bearing holes can be tested simply and conveniently.

Description

technical field [0001] The invention relates to the field of instrument measurement, in particular to a device for measuring the coaxiality of a bearing hole of a diesel engine block. Background technique [0002] With the development of science and technology, more and more mechanized and intelligent equipment appear in our life, making production and life more convenient. Diesel engine is the product of the process of industrialization. The advantages of diesel engine are high power and good economic performance. The advantages of diesel engines in terms of energy saving and carbon dioxide emissions cannot be replaced by all heat engines including gasoline engines. [0003] The body is one of the key components of the diesel engine. The main bearing holes of the body are located on the bottom of the body, mostly 7 or 9, and the main bush is installed inside. The main journal of the crankshaft is hung upside down on the main bearing by the main bearing bolt through the bea...

AI Technical Summary

Problems solved by technology

On the one hand, this method is relatively complicated; on the other hand, there is currently no simple and convenient method or device for the detection of the coaxiality of bearing holes with a large number of main bearing holes and cam bearings in the body.

Images