Inspection tool for the gap at the cam hole of the diesel engine block

Abstract

The invention provides a tool for detecting a gap at a position of a diesel engine body cam hole and capable of conveniently and quickly detecting a circular-arc-shaped avoiding gap between the diesel engine body cam hole and the outer wall of an air cylinder and improving the yield. A detection device is installed at the detection end of a positioning device and can extend into the diesel engine body cam hole with the positioning device, and the positioning device enables the detection device to be positioned at the position needing gap detection in the diesel engine body cam hole. The detection device comprises a push-pull rod, a sliding sleeve and proving rings, wherein the sliding sleeve is movably installed at the detection end of the positioning device, the push-pull rod coaxially and sequentially penetrates the positioning device and the sliding sleeve, the push-pull rod is in threaded connection with the sliding sleeve, the peripheral face of the sliding sleeve is evenly provided with at least two radial through holes communicated with axial through holes of the sliding sleeve, the proving rings are respectively installed in at least two radial through holes, the end faces of the radial inner sides of the proving rings are matched with the conical surface of the periphery of the push-pull rod, and the peripheral face formed by splicing the proving rings in at least two radial through holes is round.

Description

technical field [0001] The invention relates to the field of inspection devices for processing diesel engine parts, in particular to a detection tool for the gap at the cam hole of a diesel engine body. Background technique [0002] During the assembly and production process of a diesel engine with a relatively compact body structure, there will be interference in the space between the bearing gear of the camshaft and the outer wall of the cylinder bore, see figure 1 In order to ensure the assembly, an arc-shaped avoidance 17 is usually set on the outer wall of the cylinder and the camshaft assembly interference, that is, the outer wall blank of the cylinder bore. However, due to the difficulty in controlling the casting size, some parts of the body will have an arc-shaped avoidance of the outer wall blank of the cylinder bore. The gap is too small, which leads to interference when the camshaft is inserted into the camshaft hole from one end and cannot be assembled. If the c...

AI Technical Summary

Problems solved by technology

[0002] During the assembly and production process of a diesel engine with a relatively compact body structure, there will be interference in the space between the bearing gear of the camshaft and the outer wall of the cylinder bore, see figure 1 In order to ensure the assembly, an arc-shaped avoidance 17 is usually set on the outer wall of the cylinder and the camshaft assembly interference, that is, the outer wall blank of the cylinder bore. However, due to the difficulty in controlling the casting size, some parts of the body will have an arc-shaped avoidance of the outer wall blank of the cylinder bore. The gap is too small, which leads to interference when the camshaft penetrates the camshaft hole from one end and cannot be assembled. If the camshaft hole is bored for the entire length, it will require additional processing equipment and prolong the processing cycle, thereby reducing production capacity.

Images