Crankshaft processing technology of vertical shaft general gasoline engine

Abstract

The invention relates to a crankshaft processing technology of a vertical shaft general gasoline engine, which comprises the procedures of drilling a center hole; milling end faces; carrying out the rough turning on input and output ends; turning a curve neck; milling a flat keyway; quenching input and output end rods; carrying out double-station filleted quenching; carrying out the finish turning of input and output ends; grinding input and output end bearing stations and tooth stations; grinding the curve neck; milling a semicircular keyway; grinding an oil seal station; grinding input end conical surfaces; grinding flat key stations; grinding output end conical surfaces; and carrying out press mounting on a timing gear, wherein the procedure of polishing the oil seal station is further arranged in the front of the procedure of press mounting of the timing gear. The invention can ensure that crankshafts processed with the technology are assembled on a crankcase and can upwards spun engine oil infiltrating between an oil seal and the surface of a crankshaft oil seal station to the crankcase when the gasoline engine works, therefore, the engine oil is avoided from leaking outwards from the space between the oil seal and a crankshaft, and the quality of the vertical shaft general gasoline engine is enhanced.

Description

technical field [0001] The invention relates to the processing technology of the general gasoline engine crankshaft. Background technique [0002] The crankshaft of the vertical shaft universal gasoline engine is perpendicular to the horizontal plane when it is working. The seal between the lower end of the crankshaft and the crankcase is required to be very reliable, otherwise, the oil in the crankcase will leak out along the lower end of the crankshaft and the crankcase, thereby affecting the quality of the gasoline engine. [0003] The current processing technology of the crankshaft of the vertical axis universal gasoline engine includes drilling the center hole, milling the end face, rough turning the input and output ends, turning the neck, milling and flattening the keyway, quenching the shaft of the input and output ends, double-station fillet quenching, and finishing turning the input and output End, grinding input and output end bearing position and tooth position,...

AI Technical Summary

Problems solved by technology

[0002] The crankshaft of the vertical shaft universal gasoline engine is perpendicular to the horizontal plane when it is working. The seal between the lower end of the crankshaft and the crankcase is required to be very reliable, otherwise, the oil in the crankcase will leak out along the lower end of the crankshaft and the crankcase, thereby affecting the quality of the gasoline engine

[0003] The current processing technology of the crankshaft of the vertical axis universal gasoline engine includes drilling the center hole, milling the end face, rough turning the input and output ends, turning the neck, milling and flattening the keyway, quenching the shaft of the input and output ends, double-station fillet quenching, and finishing turning the input and output End, grinding input and output end bearing position and tooth position, grinding curved neck, milling semicircular keyway, grinding oil seal, grinding input end cone surface, grinding flat key position, grinding output end cone surface and press-fitting timing gear and other processes, using The crankshaft processed by this process is assembled on the crankcase. The cooperation between the lower end of the crankshaft and the crankcase is realized by an oil seal. The oil seal is installed between the lower end of the crankshaft and the crankcase. Good sealing effect, but when the gasoline engine is working, due to the high-speed rotation of the crankshaft, the oil will still seep out from between the crankshaft and the oil seal, even if the surface roughness of the joint between the crankshaft and the oil seal (that is, the crankshaft oil seal) is very low , still can not avoid oil leakage