Patent ID: 7755234

Claim:
A brushless motor have a variety of rotating angles for being used in different lamps, comprising: a bottom base ( 2 ) provided with a chamber ( 20 ) formed inside therein, three positioning bars ( 211 , 213 and 215 ) being located inside the chamber ( 20 ) to be respectively formed with a positioning hole ( 212 , 214 and 216 ), and a shaft base ( 22 ) being bored with a shaft hole ( 221 ); two stopping posts ( 23 ) being properly positioned around the shaft base ( 22 ) to form an inclined angle with the shaft base ( 22 ); a plurality of locking plates ( 24 ) protruding upward around the bottom base ( 2 ); each locking plate being formed with a locking hole ( 241 ); two sides of the bottom base ( 2 ) being provided with positioning ears ( 25 ), respectively, and an opening ( 27 ) formed through one sidewall of the bottom base ( 2 ); each positioning car ( 25 ) being formed with a through hole; a circuit board ( 3 ) installed in the chamber ( 20 ) of the bottom base ( 2 ), provided with a through hole ( 30 ) and a plugging set ( 31 ); a rotator ( 4 ) located above the circuit board ( 3 ) and inside the chamber ( 20 ), a bottom of the rotator being formed with a recess ( 40 ); a supporting shaft ( 41 ) installed in the recess ( 40 ), a driving gear ( 42 ) fixed at a top of the supporting shaft ( 41 ), another supporting shaft ( 43 ) positioned on the driving gear ( 42 ), a magnet ( 44 ) with a center through hole ( 45 ) located in the recess ( 40 ), a coil ( 46 ) installed in the through hole ( 45 ), and a through hole ( 47 ) centrally bored through the coil ( 46 ); a big gear ( 5 ) engaged with the driving gear ( 42 ) of the rotator ( 4 ), provided with a small gear ( 51 ) located at a bottom thereof, and two supporting shafts ( 52 ) and ( 53 ) respectively extended upward and downward at the center of the small gear ( 51 ); a big driven gear ( 6 ) engaged with the small gear ( 51 ) and provided with a small driven gear ( 61 ) positioned at a top thereof, and two supporting shafts ( 62 and 63 ) respectively extending upward and downward at a center of the small driven gear ( 61 ); a driving gear ( 7 ) engaged with the little driven gear ( 61 ) and provided with a driving shaft ( 70 ) formed at a top thereof; the driving gear ( 7 ) having teeth around a cycle; a recess ( 71 ) being formed in the driving shaft ( 70 ), a rotating shaft ( 72 ) being located in the recess ( 71 ), and a positioning plate ( 73 ) formed at its bottom; and a lid ( 8 ) covered on the bottom base ( 2 ) and provided with three positioning bars ( 81 , 82 and 83 ) located inside thereof to correspond to the positioning bars ( 211 , 213 and 215 ) of the bottom base ( 2 ), a through hole ( 84 ), plural locking projections ( 85 ) formed around its circumference, each of two sides of the lid ( 8 ) having a positioning ear ( 86 ), and each positioning ear ( 86 having a through hole ( 87 ; the positioning bars ( 81 , 82 and 83 ) being formed with a positioning hole ( 810 , 820 and 830 ), respectively.