Patent ID: 8421562
Filing Date: 2013-04-16
Classification: F02D,F02N,H01F,H01H,H02K,Y10T

Abstract:
1. A starting device for engines comprising: a motor that generates torque; a pinion gear that moves in an axial direction and engages to a ring gear of an engine, and transmits the torque of the motor to the ring gear; a fixed iron core that includes a magnetic plate and a core part fixed to the magnetic plate; a solenoid device having a first coil that forms an electromagnet by energization, and pushes out the pinion gear to a ring gear side; and an electromagnetic switch having a second coil that forms an electromagnet by energization, and opens and closes a main point of contact disposed on a motor circuit by an attraction power of the second coil; wherein, the solenoid device and the electromagnetic switch are arranged integrally in series in an axial direction, while a magnetic plate that forms a part of a magnetic circuit between the first coil and the second coil is shared by the solenoid device and the electromagnetic switch; the first coil and the second coil are wound so that the directions of a current flow in the first coil and in the second coil are the same; a length of the second coil in the axial direction is shorter than a length of the first coil in the axial direction; and a surface of the core part attracts a plunger that is alongside the second coil such that the surface of the core part is pressed against the plunger in an axial direction relative to an end surface of a bobbin on a fixed iron core side of the second coil.