Housing and motor including same
The present invention provides a housing including a teeth support part formed to protrude from the inner bottom surface thereof so as to come into contact with the end surfaces of stator teeth and support the same, and thus provides an advantageous effect of preventing the generation of cogging torque, which can occur because of the non-uniform assembly of a stator.
1. A housing comprising:
a teeth support part configured to protrude from an inner bottom surface and come in contact with end surfaces of a plurality of teeth of a stator,
wherein the teeth support part is configured to protrude in a cylindrical shape and has an outer diameter corresponding to an inner diameter of a virtual circle formed by end surfaces of the plurality of teeth,
wherein the teeth support part includes a guide protruding from an outer surface thereof and that is disposed between teeth adjacent to each other,
wherein a width of the guide in a circumferential direction equals a distance between the end surfaces of the adjacent teeth, and
wherein an outer upper surface of the guide and inner bottom surfaces of the adjacent teeth form a shape of an arc.
2. The housing of claim 1 , wherein the housing includes a bearing pocket part configured to accommodate a bearing disposed inside the teeth support part.
3. The housing of claim 2 , wherein an inner diameter of the teeth support part is equal to an outer diameter of the bearing pocket portion.
4. The housing of claim 3 , wherein the teeth support part and the bearing pocket part are integrally formed.
5. A motor comprising;
a housing;
a stator disposed inside the housing;
a rotor disposed inside the stator; and
a shaft coupled to the rotor,
wherein, the stator includes a plurality of teeth therein;
wherein the housing includes a teeth support part configured to protrude from an inner bottom surface and come in contact with end surfaces of the teeth of the stator,
having a stator core, wherein end portions of the teeth expand in a width direction and are disposed toward a center of the stator core, wherein the teeth support part is configured to protrude in a cylindrical shape and has an outer diameter corresponding to an inner diameter of a virtual circle formed by end surfaces of the plurality of teeth with respect to the center of the stator core, wherein a bearing pocket part is configured to accommodate a bearing, wherein an inner face of the bearing pocket part is fixed to an outer ring of the accommodated bearing, and an outer face of the bearing pocket part is configured to support the end surfaces of the teeth,
wherein the teeth support part includes a guide protruding from an outer face thereof and that is disposed between teeth adjacent to each other, and
wherein an outer upper surface of the guide and inner bottom surfaces of the adjacent teeth form a shave of an arc.
6. The motor of claim 5 , wherein the guide is formed at regular intervals on the outer surface of the teeth support part along a circumferential direction.
7. The motor of claim 5 , wherein a width of the guide in a circumferential direction corresponds to the length between the end surfaces of the adjacent teeth.
8. The motor of claim 5 , wherein an outer diameter of the bearing pocket portion is equal to an inner diameter of the teeth support part.
9. The motor of claim 5 , wherein the teeth support part and the bearing pocket part are integrally formed.