Mounting method of transmission gear of CG engine crankcase

Abstract

The invention discloses a mounting method of a transmission gear of a CG engine crankcase. The method comprises the steps that before mounting, a plurality of groups of timing driven gears with different cross-rod distances are designed and produced in a manner of corresponding to one timing driving gear; during mounting, the timing driving gear is firstly mounted on a crankshaft in a press-fit manner, the matched timing driven gears are selected, and mounting and gear matching are completed; and the method is characterized in that according to two sets of displacement sensors which are corrected in advance and have the mutually-fixed distance, the error detection of the center distance of the crankshaft and a camshaft hole is achieved, and the matched timing driven gears are automatically selected through a computer to be mounted. The method has the beneficial effects of being more convenient to detect and operate, higher in automation degree, smaller in detection error, and more precise and reliable in result, timing abnormal sounds caused by the improper gear backlash can be more effectively eliminated, and the service life of an engine is prolonged.

Description

technical field [0001] The invention relates to the field of motorcycle engine crankcase assembly, in particular to a method for installing a CG engine crankcase transmission gear. Background technique [0002] The CG engine is an engine that is specially used for motorcycles, and the valve is opened or closed by the cam and the ejector rod, so it is also called the ejector rod engine. In the CG engine, the crankshaft and the camshaft are arranged side by side at intervals, the end of the crankshaft is sleeved with a timing driving gear, the camshaft is fixedly arranged and a cam is rotatably fitted on the camshaft, and the outer end of the cam is sleeved and fixed with a timing driving gear The meshing timing driven gear, the cam is connected to the ejector rod through the lower rocker arm, and the ejector rod is connected to the valve through the upper rocker arm and transmits the power of the crankshaft to the valve, and then drives the valve to move so that it follows th...

AI Technical Summary

Problems solved by technology

This method still uses manual operation, and it is still prone to errors due to the mechanical measurement by individuals. The existence of the error of the gauge itself increases the error of the measured value, resulting in inaccurate final gear matching results, and it is difficult to accurately and effectively eliminate the abnormal timing noise caused by improper gear backlash

At the same time, relying on workers to operate with ring gauges, plug gauges and feeler gauges, there is still a defect that the operation is complicated, resulting in low assembly efficiency

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