ELECTRIC MOTOR FOR STARTER OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an electric motor for starter of internal combustion engine furnished with a pick finding conductive part insulation bush which is never to be a heating source to cause a thermal damage, even through the temperature of the pick finding conductive part of the electric motor rises. SOLUTION: An insulation rubber with the material property of the combustion starting temperature of 480 deg.C or more in the atmosphere, and the oxigen index not less than 21%, is manufactured by using the method to add a compound including a chemical periodic table V group element, to a rubber made by chemically leading in a chemical periodic table VII group element in a molecular structure, and a bush 20 for pick finding conductive part 10 insulation of an electric motor 200 for internal combustion engine starter is formed of this insulation rubber.