Abstract: The present invention provides a hollow rotor structure for a direct-current motor and a winding structure of the same are provided for use in a direct-current motor. The hollow rotor structure includes a commutator, can output element, and a hollow rotor. The hollow rotor includes an iron core wound with a plurality of windings and is formed with an axial hole extending along the axial direction of the hollow rotor. Once mounted in a housing, the hollow rotor is spaced from a stator fixed in the housing and is separately connected to the commutator and the output element. When the commutator supplies a current to each winding, the hollow rotor generates the corresponding electromagnetic fields, which repel the magnets on the stator respectively. Thus, the hollow rotor generates a rotating force and outputs the rotating force through the output element.

Abstract: The present invention provides a nested stator structure for a DC motor is applicable to a DC motor and includes an outer stator and an inner stator. The outer stator, mounted in the housing of the DC motor, includes outer magnets fixed to the inner wall of the housing along the circumferential direction of the housing. Each two adjacent outer magnets are spaced apart and have opposite polarities. The inner stator, mounted in the outer stator, has its front and rear ends fixed to the front and rear ends of the housing respectively, is provided with inner magnets along the circumferential direction of the housing, and is spaced from the outer stator by a rotation space, where a hollow rotor is received. When supplied with electricity, the hollow rotor generates electromagnetic fields repelling the inner and outer magnets and is hence rotated, driving an output element simultaneously to output a rotating force.

Abstract: The present invention provides a hollow rotor structure for a direct-current motor and a winding structure of the same are provided for use in a direct-current motor. The hollow rotor structure includes a commutator, can output element, and a hollow rotor. The hollow rotor includes an iron core wound with a plurality of windings and is formed with an axial hole extending along the axial direction of the hollow rotor. Once mounted in a housing, the hollow rotor is spaced from a stator fixed in the housing and is separately connected to the commutator and the output element. When the commutator supplies a current to each winding, the hollow rotor generates the corresponding electromagnetic fields, which repel the magnets on the stator respectively. Thus, the hollow rotor generates a rotating force and outputs the rotating force through the output element.

Abstract: The present invention provides a DC motor structure with a hollow rotor and inner and outer stators includes a housing, a commutator, and an output element, in addition to the hollow rotor and the stators. The commutator and the output element are received at the front and rear ends of the housing respectively. The outer stator, the hollow rotor, and the inner stator are sequentially arranged in the housing in a direction toward the central axis of the housing. The hollow rotor between the stators is wound with plural windings and has a front end and a rear end respectively connected to the commutator and the output element. When each winding receives a current from the commutator, the hollow rotor generates a corresponding electromagnetic field such that the commutator and the output element rotate simultaneously with the hollow rotor to output directly through the output element the rotating force generated by the hollow rotor.