Non-contact power transmission apparatus
An aspect of the present invention has a first disk-shaped member coupled to a first rotating shaft to rotate and a first plate-shaped member having a surface perpendicular to a surface of the first disk-shaped member and holding a first magnet. Moreover, a second disk-shaped member provided so as to face the first disk-shaped member and coupled to a second rotating shaft to rotate, and a second plate-shaped member having a surface perpendicular to a surface of the second disk-shaped member and holding a second magnet are provided. A magnetic pole of the first magnet on a side facing the second magnet and a magnetic pole of the second magnet on a side facing the first magnet have the same pole.
1. A non-contact power transmission apparatus comprising:
a first member including:
a first rotating shaft which is driven to rotate;
a first disk-shaped member which is coupled to the first rotating shaft to rotate;
a first plate-shaped member provided on a first surface of the first disk-shaped member on a side opposite to a second surface to which the first rotating shaft is coupled, the first plate-shaped member having a surface perpendicular to the first surface; and
a first magnet provided on the perpendicular surface of the first plate-shaped member;
a second member including:
a second rotating shaft which is driven to rotate;
a second disk-shaped member provided so as to face the first disk-shaped member and coupled to the second rotating shaft to rotate;
a second plate-shaped member provided on a first surface of the second disk-shaped member on a side opposite to a second surface to which the second rotating shaft is coupled, the second plate-shaped member having a surface perpendicular to the first surface; and
a second magnet provided on the perpendicular surface of the second plate-shaped member; and
a magnetic pole of the first magnet on a side facing the second magnet and a magnetic pole of the second magnet on a side facing the first magnet have the same pole,
wherein the first member is provided with a support portion main body configured to support the first plate-shaped member provided on the first surface of the first disk-shaped member on the side opposite to the second surface to which the first rotating shaft is coupled and provided at a center part on the first surface of the first disk-shaped member, the first plate-shaped member has a first end portion at a first side and a second end portion at a second side, the first end portion is closer to the first rotating shaft than the second end portion, a vicinity of the first end portion is coupled to the support portion main body, and the first magnet provided on the first plate-shaped member is arranged on the second side.
2. The non-contact power transmission apparatus according to claim 1 , wherein
when the first rotating shaft of the first member rotates, the first disk-shaped member rotates around the first rotating shaft, and the first magnet provided on the first plate-shaped member of the first disk-shaped member and the second magnet provided on second plate-shaped member of the second disk-shaped member come close to and face each other, a repulsion force is generated between the first magnet and the second magnet.
3. The non-contact power transmission apparatus according to claim 1 , wherein
the first plate-shaped member is arranged along a radiation direction around the first rotating shaft; and
the second plate-shaped member is arranged along a radiation direction around the second rotating shaft.
4. The non-contact power transmission apparatus according to claim 1 , wherein
a taper is formed on a surface of the second plate-shaped member facing the first plate-shaped member so that, when the first magnet and the second magnet come close to and face each other, the surface of the first magnet facing the second magnet and the surface of the second magnet facing the first magnet become parallel with each other.
5. The non-contact power transmission apparatus according to claim 1 , wherein
the first plate-shaped member has a through hole formed on a side closer to the first rotating shaft than the first magnet, perpendicularly to the first rotating shaft, an insertion portion of a fixing member to be fixed to the support portion main body is inserted into the through hole, and an annular reinforcing member is wound around an outer periphery of the first plate-shaped member.
6. The non-contact power transmission apparatus according to claim 5 , wherein the annular reinforcing member is constituted by a composite material in which at least carbon fiber, glass fiber or para-based wholly aromatic polyamide fiber is consolidated by a resin.
7. The non-contact power transmission apparatus according to claim 1 , wherein the second disk-shaped member has a first cylindrical portion provided in a vicinity of an outer peripheral portion of the first surface of the second disk-shaped member so as to extend in a perpendicular direction from the first surface, and the second plate-shaped member is fixed to the first surface of the second disk-shaped member and an inner peripheral surface of the first cylindrical portion.
8. The non-contact power transmission apparatus according to claim 7 , wherein the second disk-shaped member has a second cylindrical portion arranged on an outside of the first cylindrical portion in close contact with the first cylindrical portion.