Axial gap type generator
View Patent ↗There is provided an axial gap type generator exhibiting improved precision in positioning stator cores. An axial gap type generator comprises a generator case fixed to a crank case of an engine, a rotor yoke housed inside the generator case, and fixed to a crankshaft of the engine, and a first stator core and a second stator core fixed to generator case inner faces, and disposed flanking the rotor yoke in a rotation axis direction. The generator case is configured through direct connection of a first member to which the first stator core is fixed and a second member to which the second stator core is fixed.
1. An axial gap type generator, comprising: a generator case fixed to a crank case of an engine; a rotor yoke housed inside the generator case, and fixed to a crankshaft of the engine; a first stator core and a second stator core fixed to an inner face of the generator case, and disposed flanking the rotor yoke in a rotation axis direction, wherein the generator case is configured by a direct connection of a first member, to which the first stator core is fixed, and a second member, to which the second stator core is fixed, and wherein the generator case includes a mounting section that is formed and protrudes from an outer peripheral edge and an outer diameter side of the generator case, and is fastened to the crank case; and an adaptor that engages the rotor yoke with the crankshaft between the first stator and the second stator, the adaptor comprising a disk disposed between the second stator and the rotor yoke, wherein the rotor yoke is fastened to a surface of the disk that faces the crank case.
2. The axial gap type generator according to claim 1 , wherein the first member and second member of the generator case comprise an aluminum alloy.
3. The axial gap type generator according to claim 1 , wherein the first member and the second member respectively include cooling fins formed on an outer surface section thereof.
4. The axial gap type generator according to claim 1 , wherein an engaging unit for relatively positioning the first member and the second member within a plane perpendicular to a rotation axis of the crankshaft is provided at an engaging section of the first member and the second member.
5. The axial gap type generator according to claim 1 , wherein, in an axial direction of the axial gap type generator, the disk is located inside the second member such that an opposing surface of the disk to the surface of the disk faces the second stator.
6. The axial gap type generator according to claim 5 , wherein the adaptor further comprises a tubular section that protrudes from the disk toward the crank case, an output shaft of the crankshaft being inserted into the tubular section.
7. The axial gap type generator according to claim 6 , wherein, in the axial direction of the axial gap type generator, the rotor yoke is located on the tubular section between the surface of the disk and the first stator.
8. The axial gap type generator according to claim 7 , wherein the adaptor further comprises a flywheel mounting section that protrudes in the axial direction of the axial gap type generator from the opposing surface of the disk in a direction opposite to the crank case.
9. The axial gap type generator according to claim 8 , wherein, in the axial direction of the axial gap type generator, the second stator is located on the second member between the opposing surface of the disk and the second member.
10. The axial gap type generator according to claim 9 , wherein the flywheel mounting section comprises a tapered shaft.
11. The axial gap type generator according to claim 10 , further comprising:
a flywheel mounted on the flywheel mounting section for blowing cooling air into the engine.
12. The axial gap type generator according to claim 11 , wherein, in the axial direction of the axial gap type generator, the second member is located between the flywheel and the second stator.