Detection tool assembly for detecting interference of cam shaft hole and engine oil pump hole of diesel engine cylinder body

Abstract

The invention relates to a detection tool assembly for detecting interference of a cam shaft hole and an engine oil pump hole of a diesel engine cylinder body. The detection tool assembly is formed by a cam shaft hole core rod, an engine oil pump hole no-go gauge core rod, an engine oil pump hole go gauge core rod and a detection flat plate, wherein the diameters of three measuring convex rings on the cam shaft hole core rod are the same as the size of the outer diameter of a cam shaft; the diameter of one end of the engine oil pump hole go gauge core rod is calculated by a distance allowance below nominal size from the center of the cam shaft to the center of an engine oil pump on the diesel engine cylinder body; and the diameter of one end of the engine oil pump hole no-go gauge core rod is calculated by a distance allowance above nominal size from the center of the cam shaft to the center of the engine oil pump on the diesel engine cylinder body. According to the detection tool assembly disclosed by the invention, the problem that whether the cam shaft and the engine oil pump of a diesel engine are interfered or not is more early and accurately found; and a follow-up unnecessary assembling link is reduced. The detection tool assembly disclosed by the invention is reasonable in design, simple to manufacture, low in cost, high in sensitivity, strong in practicability and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of engine production, and in particular relates to a detection tool for a cylinder block of a diesel engine. Background technique [0002] The diesel engine drives the oil pump to work through the camshaft to realize oil supply and lubrication to each lubrication point on the diesel engine. The spatial position relationship between the oil pump hole and the camshaft hole on the diesel engine cylinder block is that the axis lines of the two holes are perpendicular to each other but do not intersect. The camshaft and the oil pump in the inner cavity of the body adopt a pair of cylindrical helical gears at 90° to each other to transmit torque. If the oil pump hole on the body is too long relative to the camshaft hole, the backlash of the gear will increase. If the size is too large, it will cause shock, vibration and noise to the gear transmission; on the contrary, if the size is too short, there will be serio...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there is no tool for detecting the out-of-tolerance position and size of the second hole of the cylinder block. At present, the position and size of the second hole of the cylinder block can only be measured by three coordinates. Although the result of this method is accurate, the cost is high, the operation is time-consuming, and the practicability is not strong.

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