Patent ID: 9003901
Filing Date: 2015-04-14
Classification: F02N,H02K,Y10T

Abstract:
1. A starter comprising: a motor that has an armature with a commutator disposed in an end of an armature shaft and generates torque in the armature; a speed reducer that reduces a rotating speed of the motor and increases drive torque, the speed reducer being disposed in the motor opposite to the commutator; a pinion that transmits the drive torque increased by the speed reducer to an engine ring gear; a partition wall that is disposed between the motor and the speed reducer to separate the motor and the speed reducer, the partition wall having a hole formed in a central part for passing through the end of the armature shaft; a pinion driving solenoid that forms a first electromagnet by energization, and pushes out the pinion to the ring gear side by using an attraction power of the first electromagnet; and a motor energizing switch that has a second solenoid that forms a second electromagnet by energization, and opens and closes an electric point of contact interlocking with an ON/OFF operation of the second solenoid for intermitting a current flowing into the motor, wherein the starter is able to control independently operation of the pinion driving solenoid and operation of the motor energizing switch separately, the starter further comprising a rotation detector that outputs a rotation signal of a frequency proportional to the rotating speed of the motor, and the rotation detector is disposed in a motor side inner space where the armature is disposed separated by the partition wall.