Patent ID: 8093773

Claim:
A motor for a treadmill, comprising a housing ( 1 ); a stator ( 2 ); a rotor ( 3 ) having a rotating shaft ( 4 ); a front end cover ( 9 ); a rear end cover ( 5 ); and a flywheel ( 13 ); wherein said front end cover ( 9 ) and said rear end cover ( 5 ) are disposed on both ends of said housing ( 1 ), respectively; said stator ( 2 ) and said rotor ( 3 ) are disposed in said housing ( 1 ); a front end of said rotating shaft ( 4 ) extends from said housing ( 1 ); said flywheel ( 13 ) is disposed on said front end of said rotating shaft ( 4 ); said rotating shaft ( 4 ) is connected to said flywheel ( 13 ) via a key ( 14 ); a sleeve ( 12 ) is fit on said front end of said rotating shaft ( 4 ); said sleeve ( 12 ) abuts against said flywheel ( 13 ); a locking device is disposed on an end of said rotating shaft ( 4 ) and tightly fixes said flywheel ( 13 ); said locking device comprises a stop plate ( 16 ) and a screw ( 17 ); a screw hole ( 18 ) is disposed on a front end of said rotating shaft ( 4 ); said screw ( 17 ) passes through said stop plate ( 16 ), enters said screw hole ( 18 ), and forces said stop plate ( 16 ) to axially move; a flange ( 15 ) is disposed on inner wall of said flywheel ( 13 ); said stop plate ( 16 ) presses said flange ( 15 ); said stop plate ( 16 ) and said sleeve ( 12 ) operate to axially fix said flywheel ( 13 ); an impeller ( 6 ) is disposed on a rear end of said rotating shaft ( 4 ) whereby facilitating axial blowing and heat dissipation; and a wave-shaped washer ( 10 ) is disposed between said front end cover ( 9 ) and a bearing ( 11 ), wherein said bearing ( 11 ) is disposed in said front end cover ( 9 ).