Patent ID: 8803386

Claim:
A brushless DC motor, comprising: a) a motor casing; b) a stator component; and c) a rotor component; wherein: the stator component and the rotor component are respectively arranged inside the motor casing; the rotor component comprises a rotor iron core and a rotating shaft supporting the rotor iron core, and a shaft extension end of the rotating shaft is arranged with a magnetic ring; one end of the motor casing is arranged with an end cover; a center of an outer end surface of the end cover is arranged with a groove; the magnetic ring is arranged inside the groove; a Hall induction device is arranged outside the groove and close to the magnetic ring; the Hall induction device comprises a circuit board mounted with a Hall element and an installation kit, one end of the installation kit is connected with the circuit board and the other end supports the outer end of the end cover; the installation kit is arranged with a plurality of uprights; the circuit board is disposed with a plurality of through holes; the through holes are fit together with the uprights; a middle part of the installation kit is arranged with a convex ring body embedded into the groove; an outer edge surface of the convex ring body fits closely with a wall surface of the groove; and an outer side of the groove forms a cylinder body with an installation foot arranged outside; the installation foot is arranged with a screw hole; strip-shaped holes are arranged on corresponding upper and lower positions of the circuit board and the installation kit, respectively; screws passes through the strip-shaped holes and screw holes to connect the circuit board, the installation kit, and the installation feet together.