Patent ID: 9512812
Filing Date: 2016-12-06
CPC Classification: F02N,Y10T

Claim Text:
1. An engine starting device comprising: a motor unit; an output rotation shaft driven by the motor unit; a pinion gear unit which rotates according to the rotation of the output rotation shaft; and a pushing mechanism which moves the pinion gear unit towards an engagement location of the pinion gears, and an engine starting gear, wherein an engine is started by a rotation force of the motor unit through the pinion gears and the engine starting gear which are engaged with each other, the pinion gear unit includes a first pinion gear which is configured to engage with the engine starting gear when the pinion gear unit is moved towards the engagement location by the pushing mechanism, and a second pinion gear which is engaged with the engine starting gear after the first pinion gear, when the pinion gear unit further moves towards the engagement location, a void is formed between a surface of a tooth portion of the first pinion gear on the side of a tooth portion of the second pinion gear, and a surface of a tooth portion of the second pinion gear on the side of a tooth portion of the first pinion gear, a cylindrical rotation member which is penetrated by the output rotation shaft, and the cylindrical rotation member is commonly used for the first and second pinion gears and rotates the first pinion gear and the second pinion gear, penetrates the first and second pinion gears, to be fit to the first and second pinion gears, and a gap for allowing the inclination of the first pinion gear with respect to the second pinion gear is formed between the first pinion gear and the cylindrical rotation member on the penetration portion.