Motor and cleaner having the same
A motor and a cleaner including the same where the motor includes a stator including a stator including a stator core, a rotating shaft arrangeable inside of the stator, a rotor rotatable about the rotating shaft by electromagnetically interacting with the stator while the rotating shaft is arranged inside the stator, a housing to accommodate the stator and the rotor, a bearing coupleable to the housing so that while the bearing is coupled to the housing, the bearing supports a rotation of the rotor about the rotating shaft while the stator and the rotor are stably accommodated in the housing and a frame to support the bearing in the housing, the frame being positioned in the housing to be in contact with the stator core and the bearing to allow the stator core and the bearing to be electrically connected.
1 . A motor comprising:
a stator including a stator core;
a rotor inside the stator and including a rotating shaft, the rotor configured to electromagnetically interact with the stator to rotate the rotating shaft;
a housing to accommodate the stator and the rotor;
a bearing coupled to the housing so that the bearing supports rotation of the rotating shaft while the stator and the rotor are stably accommodated in the housing; and
a frame in the housing and configured to support the bearing in the housing, the frame including a contact rib that is in contact with an outer circumferential surface of the stator core and an outer ring of the bearing such that the stator core and the bearing are electrically connected,
wherein the housing includes at least one support rib that is on an inner side of the contact rib, and
wherein an axial end of the stator core contacts the at least one support rib.
2 . The motor of claim 1 , wherein
the frame is formed of metal, and
the housing is injection molded with the frame inserted therein so that the frame is integrally formed with the housing.
3 . The motor of claim 2 , wherein
the frame includes an upper frame above the stator core and a lower frame below the stator core, and
the bearing includes a first bearing that is seated on the upper frame and a second bearing that is seated on the lower frame.
4 . The motor of claim 3 , wherein
the upper frame includes a first seating hole at an upper end of the upper frame and the first bearing is seated in the first seating hole, and
the lower frame includes a second seating hole at a lower end of the lower frame and the second bearing is seated in the second seating hole.
5 . The motor of claim 4 , wherein
the upper frame includes:
a first base on which the first seating hole is formed, and
a first contact rib that extends downward from the first base and contacts the stator core, and
the lower frame includes:
a second base on which the second seating hole is formed, and
a second contact rib that extends upward from the second base and contacts the stator core.
6 . The motor of claim 5 , wherein
the first contact rib and the second contact rib contact respective portions of an outside of the stator core, and
the at least one support rib is on an inner side of at least one of the first contact rib or the second contact rib to support the stator core.
7 . The motor of claim 1 , further comprising
an adhesive member to couple the frame and the bearing; and
at least one cover member configured to cover the adhesive member to improve an adhesive strength of the adhesive member.
8 . The motor of claim 7 , wherein
the frame includes:
an upper frame above the stator core and including:
a first base formed on an upper portion of the upper frame, and
a first seating hole formed in the first base, and
a lower frame below the stator core and including:
a second base formed on a lower portion of the lower frame, and
a second seating hole formed in the second base,
the bearing includes:
a first bearing seated in the first seating hole, and
a second bearing seated in the second seating hole,
the adhesive member includes:
a first adhesive member coupling the upper frame and the first bearing, and
a second adhesive member coupling the lower frame and the second bearing, and
the at least one cover member is configured to cover the first adhesive member and/or the second adhesive member.
9 . The motor of claim 8 , wherein
the first bearing protrudes upward more than the first base,
the first adhesive member surrounds an outer ring of the first bearing that protrudes upward from the first base,
the second bearing protrudes downward more than the second base, and
the second adhesive member surrounds an outer ring of the second bearing that protrudes downward from the second base.
10 . The motor of claim 3 , further comprising:
an impeller coupled to an upper portion of the rotating shaft outside the housing, and configured to generate an air flow,
wherein, to support a load of the impeller, a cross-sectional area of the first bearing is larger than a cross-sectional area of the second bearing.
11 . The motor of claim 3 , wherein a diameter ratio corresponding to a diameter of the first bearing divided by a diameter of the second bearing is 1.1 to 1.6.
12 . The motor of claim 3 , wherein
the upper frame is in the housing and is in contact with the outer circumferential surface of the stator core and an outer ring of the first bearing so that the stator core and the first bearing are electrically connected, and
the lower frame is in the housing and is in contact with the outer circumferential surface of the stator core and an outer ring of the second bearing so that the stator core and the second bearing are electrically connected.
13 . The motor of claim 3 , wherein
the upper frame includes the contact rib that includes a first contact rib that is in contact with the outer circumferential surface of the stator core and an outer ring of the first bearing so that the stator core and the first bearing are electrically connected, and the at least one support rib includes a first support rib on an inner side of the first contact rib, and in contact with a first radial surface of the stator core so as to support the stator core in the housing, and
the lower frame includes the contact rib that includes a second contact rib that is in contact with the outer circumferential surface of the stator core and an outer ring of the second bearing so that the stator core and the second bearing are electrically connected, and the at least one support rib includes a second support rib on an inner side of the second contact rib, and in contact with a second radial surface of the stator core so as to support the stator core in the housing.