Patent ID: 9518550
Filing Date: 2016-12-13
CPC Classification: F02N,Y10T

Claim Text:
1. An engine starting device comprising: a motor unit; a pinion gear unit which rotates according to the rotation of an output rotation shaft driven by the motor unit; a pushing mechanism which moves the pinion gear unit towards an engagement location of the pinion gear and an engine starting gear; and a bracket which includes a bracket main body unit which supports the motor unit and the pushing mechanism and a nose unit which extends from the bracket main body unit and rotatably bears a tip portion of the output rotation shaft, wherein an engine is started by a rotational force of the motor unit through the pinion gear and the engine starting gear which are engaged with each other, the pinion gear unit includes a rotation member which is spline-coupled to the output rotation shaft, is moved in a direction toward the engine starting gear by the pushing mechanism, and rotates according to the rotation of the output rotation shaft, a pinion gear which is fit to the rotation member to be movable in the direction toward the engine starting gear, moves with the rotation member if the pinion gear unit is moved towards the engagement location by the pushing mechanism, is engaged with the engine starting gear, and rotates with the rotation member according to the rotation of the output rotation shaft, and an elastic member which pushes the pinion gear to be biased in the direction toward the engine starting gear, a first stopper unit, which restricts the movement of the rotation member in the direction toward the engine starting gear such that the rotation member can only move a first predefined distance in the direction toward the engine starting gear, is provided on the output rotation shaft, a second stopper unit, which restricts the movement of the pinion gear that is in the direction toward the engine starting gear due to pushing and biasing of the elastic member, is provided on the rotation member, and the first stopper unit, the pinion gear, the second stopper unit, and the tip portion borne by the nose unit are positioned in sequence along the axis of the output rotation shaft.