Brushless direct current motor

1. A device, comprising:

a base;

an insulation seat;

a rotor assembly;

a revolving shaft;

a stator assembly;

a control panel;

a Hall circuit board; and

an end cover;

wherein:

the revolving shaft is connected to the rotor assembly;

the rotor assembly comprises a housing and a plurality of magnetic tiles; the housing comprises an inner wall and a cavity defined by the inner wall; the plurality of magnetic tiles is disposed on the inner wall;

the stator assembly is disposed in the cavity;

the base comprises a cylindrical sleeve extending from a center of the base to the cavity of the rotor assembly;

the stator assembly is connected to the cylindrical sleeve;

two ends of the cylindrical sleeve are provided with a first bearing and a second bearing, respectively; and two ends of the revolving shaft are supported by the first bearing and the second bearing, respectively;

the end cover is disposed on the base and an accommodation cavity is formed therebetween;

the base comprises a first through hole and a second through hole; the first through hole is disposed on an inner side of the plurality of magnetic tiles;

the insulation seat is disposed in the accommodation cavity; the insulation seat comprises a protrusion extending towards the cavity and a recess corresponding to the protrusion; the protrusion is disposed in the first through hole;

the control panel is disposed on the insulation seat the Hall circuit board is disposed in the recess;

at least one Hall element is secured to the Hall circuit board; and the at least one Hall element faces towards the protrusion;

the insulation seat further comprises a first surface facing the control panel and a second surface facing the base;

the first surface comprises a fixed platform provided with three third through holes;

the second surface comprises a convex frame corresponding to the fixed platform in position;

the convex frame is disposed in the second through hole;

the stator assembly comprises a contact pin; and

one end of the contact pin passes through the three third through holes to electrically connect to the control panel.

2. The device of claim 1 , wherein three Hall elements are secured to the Hall circuit board.

3. The device of claim 2 , wherein the recess comprises a bottom surface; the bottom surface comprises three square grooves and two positioning columns disposed between every two adjacent square grooves; the Hall circuit board is supported by the two positioning columns; and the three Hall elements are disposed in the three square grooves, respectively.

4. The device of claim 1 , wherein the convex frame comprises a first part and a second part; the second part is disposed outside the cylindrical sleeve; and a height of the second part is larger than a height of the first part.

5. The device of claim 4 , wherein the cylindrical sleeve comprises an outer surface provided with a step; the stator assembly comprises a stator core abutting against the step; a part of the step is sunken to form a groove to collect aluminum scraps.

6. The device of claim 5 , wherein the control panel comprises a heating element; the end cover comprises a first end face and a second end face; the first end face comprises a cooling platform attached to the heating element.

7. The device of claim 6 , wherein the second end face of the end cover comprises a plurality of radiating ribs.

8. The device of claim 7 , wherein the base comprises an annular side wall and a plurality of mounting columns secured to the annular side wall; each mounting column comprises a first screw hole; the insulation seat comprises a plurality of openings corresponding to the plurality of mounting columns in positions; the end cover is secured to the annular side wall and fixed on the plurality of mounting columns through a plurality of first screws.

9. The device of claim 8 , wherein the base further comprises a plurality of supporting seats abutting against the plurality of mounting columns, respectively; each supporting seat comprises a second screw hole; the insulation seat comprises a rim, and a plurality of supporting platforms corresponding to the plurality of supporting seats in positions; each supporting platform comprises a fourth through hole; the control panel is supported by the plurality of supporting platforms; the control panel comprises a plurality of mounting holes; the control panel, the insulation seat, and the base are fixed together through a plurality of second screws passing through the plurality of mounting holes, the fourth through hole, and the second screw hole in order.

10. The device of claim 9 , wherein the inner wall of the housing comprises a bracket; the bracket comprises a plurality of T-shaped columns; and the plurality of magnetic tiles each is disposed between every two adjacent T-shaped columns.

11. The device of claim 1 , wherein the stator assembly further comprises a coil winding; a middle part of the contact pin is soldered to one end of the coil winding to form a soldering part; the soldering part is disposed in the convex frame.

12. The device of claim 11 , wherein the middle part of the contact pin protrudes to form a clip; and the one end of the coil winding is soldered to the clip to form the soldering part.