Axial gap motor
An axial gap motor includes a rotor configured to rotate around a rotation axis and a stator disposed to be opposed to the rotor across a gap in an axial direction parallel to the rotation axis. The rotor includes a hub, an annular rim located on the outer side of the hub and holding a permanent magnet, a coupling section coupling the hub and the rim and including a recess having a first opening opened on a surface facing one end side in the axial direction, a first plate member disposed on the one end side of the coupling section and covering at least a part of the first opening in plan view from the axial direction, and a member disposed in the recess and having density lower than the density of the coupling section.
1. An axial gap motor comprising:
a rotor configured to rotate around a rotation axis; and
a stator disposed to be opposed to the rotor across a gap in an axial direction parallel to the rotation axis, wherein
the rotor includes:
a hub;
an annular rim located on an outer side of the hub and holding a permanent magnet;
a coupling section coupling the hub and the rim and including a recess having a first opening opened on a surface facing one end side in the axial direction;
a first plate member disposed on the one end side of the coupling section and covering at least a part of the first opening in plane view from the axial direction; and
a member disposed in the recess and having density lower than density of the coupling section,
wherein the first plate member includes a first through-hole that causes an inside and an outside of the recess to communicate,
wherein the recess includes a second opening opened on a surface facing another end side in the axial direction of the coupling section,
the rotor includes a second plate member disposed on the other end side of the coupling section and covering at least a part of the second opening in the plane view from the axial direction,
the second plate member includes a second through-hole that causes the inside and the outside of the recess to communicate, and
the member includes a through hole that causes the first through-hole and the second through-hole to communicate,
wherein the member is in contact with the first plate member.
2. The axial gap motor according to claim 1 , wherein the member is filled in the recess.
3. The axial gap motor according to claim 1 , wherein, in the plane view from the axial direction, the first through-hole overlaps a center of the recess.
4. The axial gap motor according to claim 1 , wherein the first through-hole overlaps a loop of vibration that occurs in the first plate member.
5. The axial gap motor according to claim 1 , wherein a plurality of the recesses are disposed along a circumferential direction of the coupling section.
6. The axial gap motor according to claim 1 , wherein the member is a resin material.
7. The axial gap motor according to claim 6 , wherein the member is silicone rubber.
8. The axial gap motor according to claim 6 , wherein the member is a foamed body.