Tooling and method used for fixedly connecting camshaft with camshaft sprocket

Abstract

The invention discloses a tooling used for fixedly connecting a camshaft with a camshaft sprocket. The tooling comprises a upper lifting appliance, a lower clamp hoop and a camshaft sprocket bracket, wherein the upper lifting appliance comprises a lifting bolt, an upper hanger plate, an upper clamp hoop and a plurality of connection screws; the upper clamp hoop is arranged below the upper hanger plate; the upper hanger plate and the upper clamp hoop are fixedly connected into a whole through the connection screws. The connection method of the tooling is that the upper clamp hoop and the lower clamp hoop are radially clamped and fixed on the vertical positioning benchmarks at the upper and lower ends of the camshaft respectively, and then the camshaft sprocket is horizontally supported by the camshaft sprocket bracket after being heated. The camshaft is lifted up vertically, the perpendicularity of the camshaft and the levelness of the camshaft sprocket are adjusted respectively, and finally, the lower end of the camshaft enters a central hole in the camshaft sprocket to fulfill assembling. The tooling and the method have the advantages that the perpendicularity tolerance of the camshaft is controlled; the axial positioning of the camshaft sprocket is accurate; the mounting accuracy and the mounting efficiency of a diesel engine are improved; the mounting cost is reduced.

Description

technical field [0001] The invention relates to a tooling and a method for an interference fit connection between a shaft and a transmission part, in particular to a tooling and a method for an interference fit connection between a diesel engine camshaft and a heated sprocket red sleeve, and belongs to the technical field of diesel engine assembly. Background technique [0002] The diesel engine relies on the operation of the camshaft to drive the exhaust valve to open and the fuel injector to supply oil. The camshaft is driven by the sprocket installed at its end. The camshaft sprocket is connected with the crankshaft sprocket through a chain to obtain the crankshaft power. When the diesel engine is working, the cam rotation on the camshaft is provided to drive the valve ejector rod for precise exhaust and fuel injection timing. The assembly accuracy of the camshaft sprocket and the camshaft is very important to the assembly accuracy of the diesel engine. The verticality to...

AI Technical Summary

Problems solved by technology

The assembly of the existing camshaft and camshaft sprocket uses the camshaft to be supported horizontally on two V-shaped brackets below it, and then the vertically suspended heated camshaft sprocket is aligned with the center hole and pushed into the camshaft The installation method of the interference fit red sleeve at the end, this installation method must be installed successfully at one time, once the heated camshaft sprocket is skewed into the end of the camshaft, the camshaft sprocket cannot be removed, causing the sprocket to be scrapped or Heavy workload rework

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