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US 7,459,826 B2Granted
Laminated body of motor and manufacturing method thereof
AssigneeLG Electronics Inc.
InventorSeung-Weon Lee
Life of this patent
Estimating the term…
Abstract
A laminated body of a motor includes: a yoke spirally laminated to form a hollow cylindrical shape; a plurality of teeth protruding from one side edge of the yoke disposed along a longitudinal direction of the yoke and being separated apart at a predetermined distance; a plurality of notch portions on an opposite side edge of the yoke, each of the plurality of notch portions being aligned with each of the plurality of teeth; a stopping protrusion extendingly formed at a protruding end of the teeth in the longitudinal direction of the yoke; and an inclined portion having an inclined surface formed by decreasing a width of the stopping protrusion toward an end of the stopping protrusion so as to reduce cogging torque.
Claims17
A laminated body of a motor comprising:
- a yoke having a belt shape with a length longer than a width of the yoke, the yoke being spirally laminated to form a hollow cylindrical shape;
- and
- a plurality of teeth protruding from one side edge of the yoke, the plurality of teeth being disposed along a longitudinal direction of the yoke and being spaced apart at a predetermined distance, each of the teeth including
- a tooth base extending from the one side edge of the yoke at a first end of the tooth base to a second end of the tooth base;
- a stopping protrusion extendingly formed at the second end of the tooth base;
- a plurality of pin holes formed at the yoke, each of the plurality of pin holes corresponding to one of the plurality of teeth;
- an inclined portion of the stopping protrusion having an inclined surface formed by decreasing a width of the stopping protrusion toward an end of the stopping protrusion so as to reduce cogging torque;
- and
- grooves located at both sides of the tooth base at a junction of the tooth base at the first end and the yoke in the longitudinal direction of the yoke, each of the grooves having a shape corresponding to an end shape of the stopping protrusion, a width between the two grooves at both sides of the corresponding tooth base being smaller than a width of the corresponding tooth base at the second end thereof.
6 more elements
A laminated body of a motor, comprising:
- a yoke having a belt shape with a length longer than a width of the yoke and having a plurality of teeth protruding from one side of the yoke, the yoke being spirally laminated to form a hollow cylindrical shape with the teeth facing outward, each of the teeth including:
- a tooth base extending from the one side of the yoke at a first end of the tooth base to a second end of the tooth base;
- a stopping protrusion extendingly formed at the second end of the tooth base;
- a plurality of pin holes formed at the yoke, each of the plurality of pin holes corresponding to one of the plurality of teeth;
- an inclined portion of the stopping protrusion having an inclined surface formed by decreasing a width of the stopping protrusion toward an end of the stopping protrusion so as to reduce cogging torque;
- and
- grooves formed at both sides of the tooth base at a junction of the tooth base at the first end and the yoke in a longitudinal direction of the yoke, each of the grooves having a shape corresponding to an end shape of the stopping protrusion, the tooth base having a substantially same width except a width of the tooth base where the grooves are formed.
4 more elements
A laminated body for a motor, comprising:
- a yoke formed of a metallic strip with a first edge and a second edge that are shaped to allow edgewise spiral lamination to form multiple turns of lamination layers resulting in a hollow cylindrical shape;
- the first edge of the yoke having a plurality of notches respectively formed at certain intervals thereon to provide edgewise flexibility during spiral lamination;
- a plurality of teeth respectively formed at certain intervals and extending laterally from the second edge of the yoke, such that the teeth extend in a radial manner from the hollow cylindrical shape upon spiral lamination, and each tooth having a substantially uniform width and a substantially uniform length, each tooth having a notched junction at each point where the tooth meets the second edge of the yoke to provide edgewise flexibility during spiral lamination, and each tooth having a stopper protruding from a distal end thereof in two opposing directions along the width of the tooth, the stopper being relatively perpendicular to the tooth and having tapered ends to reduce cogging torque;
- interlocking coupling portions formed on each tooth for coupling adjacent turns of lamination layers to each other upon spiral lamination;
- and
- a plurality of pin holes formed at the yoke to accommodate a laminating device during spiral lamination, each of the plurality of the pin holes corresponding to one of the plurality of teeth.
3 more elements
A laminated body for a motor, comprising:
- a yoke formed of a metallic strip with a first edge and a second edge that are shaped to allow edgewise spiral lamination to form multiple turns of lamination layers resulting in a hollow cylindrical shape:
- the first edge of the yoke having a plurality of notches respectively formed at certain intervals thereon to provide edgewise flexibility during spiral lamination, a plurality of teeth respectively formed at certain intervals and extending laterally from the second edge of the yoke, such that the teeth extend in a radial manner from the hollow cylindrical shape upon spiral lamination, and each tooth having a substantially uniform width and a substantially uniform length.
Dependencies are inferred from the claim text.