Gasoline engine electric-starting flywheel

Abstract

The invention discloses an electric starting flywheel of a gasoline engine, which includes a flywheel disc, an inner alnico and an outer alnico fixed on the flywheel disc, and a balancing weight. The flywheel disc which is strike molded by steel plate has a concave cavity and an electric starting driven gear. The driven gear is arranged on the hem around the flywheel disc, the opening part of theconcave cavity of the flywheel disc bends and extends outwards to form the hem, and the hem and the flywheel are integrated. The invention reduces the weight of the flywheel, lessens the rotation inertia of the flywheel, can stop the rotation completely in three seconds when braking, can ensure the stability and the reliability of the torque transmitting by the electric starting driven gear during, and can prolong the service life of the flywheel.

Description

technical field [0001] The invention relates to a starting flywheel of an engine, in particular to an electric starting flywheel of a gasoline engine. Background technique [0002] The starting flywheel of the gasoline engine is usually installed at one end of the crankshaft, and has the functions of starting the engine ignition and inertia reset. The outer circumference of the flywheel disc of the existing electric starter flywheel needs an interference fit with a driven gear. The driven gear meshes with the gear on the starter motor shaft, and the power of the starter motor drives the flywheel disc to rotate, thereby driving the crankshaft to start. engine. Referring to Fig. 6, the flywheel disc 20 of the electric starter flywheel of the existing gasoline engine is generally a cast iron product, and the wall thickness of the flywheel disc must be more than 10mm to ensure its strength and rigidity, so that it can form with the driven gear 21 Strong interference fit, when ...

AI Technical Summary

Problems solved by technology

However, the flywheel disc made of cast iron needs to ensure strength and rigidity, resulting in heavy weight, large rotational inertia, long braking time, and cannot be completely stopped within 3 seconds, so it cannot be used for machinery such as lawnmowers. The braking of a small engine must be stopped within 3 seconds, and the flywheel of this cast iron structure still has a large machining allowance, poor heat dissipation, low production efficiency, processing and polluting the environment, etc., and its weak parts are easy to Crack, making the flywheel useless

In order to reduce the weight of the flywheel and reduce its inertia, some flywheels are made of aluminum alloy casting, but the strength of the flywheel made of aluminum alloy is low, its key parts are easy to wear, and there is a problem of short service life, especially the aluminum alloy material. The cost is high, which increases the burden on enterprises or users

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