Abstract: A conic bearing positioning member for a spindle motor includes a small diameter portion abutting against an inner race of a ball bearing of the spindle motor, a large diameter portion abutting against a rotor of the spindle motor, and at least one resilient connecting portion extending between the small diameter portion and the large diameter portion for biasing the ball bearing and the rotor away from each other, assuring a gap between the ball bearing and the rotor. The conic bearing positioning member may be a helical spring.

Abstract: A casing for a heat-dissipating fan includes a bottom board and a plurality of sidewalls extending from the bottom board. The bottom board and the sidewalls are integrally formed by punching a magnetically conductive plate. The bottom board includes a base on which a stator having a coil assembly is mounted. An axial hole is defined in the base of the bottom board, and a bearing is mounted in the axial hole for rotatably holding a shaft of a rotor. Magnetic pole faces are formed on the base of the bottom board by punching the base of the bottom board. The magnetic pole faces surround the axial hole and are adjacent to the coil assembly of the stator.

Abstract: A conic bearing positioning member for a spindle motor includes a small diameter portion abutting against an inner race of a ball bearing of the spindle motor, a large diameter portion abutting against a rotor of the spindle motor, and at least one resilient connecting portion extending between the small diameter portion and the large diameter portion for biasing the ball bearing and the rotor away from each other, assuring a gap between the ball bearing and the rotor. The conic bearing positioning member may be a helical spring.

Abstract: A combination of a base and an axle tube is provided for a motor. The base includes a tubular body and an axial hole through which the axle tube extends. A flange extends upward from a peripheral edge delimiting the axial hole. At least one positioning groove is defined in an inner periphery of the flange. The axle tube includes at least one protrusion on an outer periphery thereof for engaging with the positioning groove of the base. At least one resilient hook rod is formed in the tubular body of the axle tube and has a hook for securely retaining a stator around the axle tube and for securely retaining at least one bearing in the axle tube.

Abstract: A brushless DC motor includes a pole plate, a magnetic pole base, a coil assembly, a circuit board, and a rotor. Each of the pole plate and the magnetic pole base is formed by punching a magnetically conductive plate and includes several pole faces and a magnetically conductive tube, with the respective pole faces being annularly located around the respective magnetically conductive tube. The magnetically conductive tube of the magnetic pole plate and the magnetically conductive tube of the pole base are securely mounted one around the other to form an axle tube. At least one bearing is received in the axle tube for rotatably holding a shaft of the rotor. The pole faces of the magnetic pole base and the pole faces of the pole plate are alternately disposed and located around the axle tube.

Abstract: A combination includes a casing having a base extending therefrom and an axle tube. The base has an axial hole, and at least one engaging portion is defined in an underside of the casing. The axle tube has at least one positioning portion on an end thereof. The axle tube is extended through the axial hole of the base, with the positioning portion of the axle tube being securely engaged with the engaging portion of the base. When an axle tube of different inner diameter or length is required, only an additional mold for the axle tube is required. It is not necessary to manufacture a mold for the whole casing.

Abstract: A brushless DC motor includes a pole plate, a magnetic pole base, a coil assembly, a circuit board, and a rotor. Each of the pole plate and the magnetic pole base is formed by punching a magnetically conductive plate and includes several pole faces and a magnetically conductive tube, with the respective pole faces being annularly located around the respective magnetically conductive tube. The magnetically conductive tube of the magnetic pole plate and the magnetically conductive tube of the pole base are securely mounted one around the other to form an axle tube. At least one bearing is received in the axle tube for rotatably holding a shaft of the rotor. The pole faces of the magnetic pole base and the pole faces of the pole plate are alternately disposed and located around the axle tube.

Abstract: A casing for a heat-dissipating fan includes a bottom board and a plurality of sidewalls extending from the bottom board. The bottom board and the sidewalls are integrally formed by punching a magnetically conductive plate. The bottom board includes a base on which a stator having a coil assembly is mounted. An axial hole is defined in the base of the bottom board, and a bearing is mounted in the axial hole for rotatably holding a shaft of a rotor. Magnetic pole faces are formed on the base of the bottom board by punching the base of the bottom board. The magnetic pole faces surround the axial hole and are adjacent to the coil assembly of the stator.

Abstract: A single magnetic conductive plate for a single pole plate brushless dc motor comprises a pole plate, a plurality of pole faces, and an axial hole. The pole plate, the pole faces and an axial hole are integrated into the single magnetic conductive plate. The pole plate is regarded as a base and adapted to combine with a coil to form a stator. The pole faces are punched and equi-spaced round the axial hole proximal the coil. The axial hole is adapted to combine with a mounting seat for supporting a rotor.

Abstract: A single magnetic conductive plate for a single pole plate brushless dc motor comprises a pole plate, a plurality of pole faces, and an axial hole. The pole plate, the pole faces and an axial hole are integrated into the single magnetic conductive plate. The pole plate is regarded as a base and adapted to combine with a coil to form a stator. The pole faces are punched and equi-spaced round the axial hole proximal the coil. The axial hole is adapted to combine with a mounting seat for supporting a rotor.

Abstract: A stator and bearing fixing structure of a motor includes a housing provided with a shaft seat having a bottom provided with a bottom stop member and having an outer wall provided with multiple snap members. An insulating seat consisting of an upper insulating plate and a lower insulating plate may isolate a magnetically conductive assembly and may be wound with metallic coils, thereby forming a stator which is mounted on the outer wall of the shaft seat. The upper insulating plate is provided with an annular lip, and the lower insulating plate is provided with multiple protruding snap members that may be snapped with the snap members of the shaft seat. A bearing is placed in the shaft seat and has a first end stopped by the bottom stop member, and a second end pressed by the annular lip.

Abstract: A stator and bearing fixing structure of a motor includes a housing provided with a shaft seat having a bottom provided with a bottom stop member and having an outer wall provided with multiple snap members. An insulating seat consisting of an upper insulating plate and a lower insulating plate may isolate a magnetically conductive assembly and may be wound with metallic coils, thereby forming a stator which is mounted on the outer wall of the shaft seat. The upper insulating plate is provided with an annular lip, and the lower insulating plate is provided with multiple protruding snap members that may be snapped with the snap members of the shaft seat. A bearing is placed in the shaft seat and has a first end stopped by the bottom stop member, and a second end pressed by the annular lip.

Abstract: A brushless motor comprises a casing including an axle seat with an axle hole, the axle hole having a flange provided therein. An axle tube is engaged on the axle seat and includes a bearing mounted therein for rotatably holding a shaft of a rotor. The shaft includes a distal end that extends beyond an end face of the bearing, the distal end including a neck to thereby define an annular groove. An engaging member mounted in the axle hole of the axle seat and retained in place by the bearing or the axle tube. The engaging member includes a hole having an inner diameter smaller than a diameter of the shaft of the rotor. An inner peripheral wall defining the hole of the engaging member includes a plurality of notches to thereby allow forcible passage of a distal end of the shaft through the hole of the engaging member. The peripheral wall of the hole of the engaging member is located in the annular groove of the shaft after the distal end of the shaft is passed through the hole of the engaging member.

Abstract: A brushless motor comprises a casing including an axle seat with an axle hole, the axle hole having a flange provided therein. An axle tube is engaged on the axle seat and includes a bearing mounted therein for rotatably holding a shaft of a rotor. The shaft includes a distal end that extends beyond an end face of the bearing, the distal end including a neck to thereby define an annular groove. An engaging member mounted in the axle hole of the axle seat and retained in place by the bearing or the axle tube. The engaging member includes a hole having an inner diameter smaller than a diameter of the shaft of the rotor. An inner peripheral wall defining the hole of the engaging member includes a plurality of notches to thereby allow forcible passage of a distal end of the shaft through the hole of the engaging member. The peripheral wall of the hole of the engaging member is located in the annular groove of the shaft after the distal end of the shaft is passed through the hole of the engaging member.

Abstract: A fixing structure for an axle tube of a motor comprises a support member including an assembly hole through which a relatively smaller outer diameter portion of an outer periphery of an end cap extends. The end cap includes a relatively larger outer diameter portion having an end face abutting against a lower side of the support member. The relatively smaller outer diameter portion of the end cap is extended through the assembly hole of the axle tube and engaged with a relatively larger inner diameter portion of an axle tube that further includes a relatively smaller inner diameter portion in which a bearing is secured. An end face of the axle tube abuts against an upper side of the support member while the relatively larger outer diameter portion of the end cap abuts against the lower side of the support member, thereby sandwiching the support member.