A carbon brush for transferring high currents having a connective piece for connecting an electric conductor and a consumable contact piece having a contact surface formed for abutting against a commutator element. The connective piece has a silver content of approximately 5% by weight to approximately 39% by weight and the contact piece has a silver content of approximately 40% by weight to 100% by weight.

A carbon brush for transferring high currents having a connective piece for connecting an electric conductor and a consumable contact piece having a contact surface formed for abutting against a commutator element. The connective piece has a silver content of approximately 5% by weight to approximately 39% by weight and the contact piece has a silver content of approximately 40% by weight to 100% by weight.

A motor includes a commutator, a brush, a first spring, a second spring, and a holder. The brush is configured to come into contact with the commutator to be electrically connected to the commutator. The first spring is configured to push the brush along the first direction toward the commutator. The second spring pushes the brush along a second direction intersecting the first direction. The holder is disposed such that the brush is located between the holder and the second spring in the second direction. The holder holds the brush between the holder and the second spring.

The present disclosure provides a brushed direct-current slip ring motor comprising: a commutator-armature system secured to a stationary shaft of a motor base, the commutator-armature system comprising: commutator segments connected via wires, teeth in a circular orientation forming slots, and commutator leads connected to the commutator segments and secured to the wires; a top slip ring above the commutator segments; a bottom slip ring below the commutator segments, a rotor configured to axially rotate responsive to an electromagnetic field produced from the commutator-armature system comprising: a plurality of magnets configured to axially rotate with the rotational shaft; a first brush system in contact with one or more of the commutator segments, the first brush system being configured to axially rotate with the rotor; and a second brush system in contact with one or more of the commutator segments, the second brush system being configured to axially rotate with the rotor.

The present disclosure provides a brushed direct-current slip ring motor comprising: a commutator-armature system secured to a stationary shaft of a motor base, the commutator-armature system comprising: commutator segments connected via wires, teeth in a circular orientation forming slots, and commutator leads connected to the commutator segments and secured to the wires; a top slip ring above the commutator segments; a bottom slip ring below the commutator segments, a rotor configured to axially rotate responsive to an electromagnetic field produced from the commutator-armature system comprising: a plurality of magnets configured to axially rotate with the rotational shaft; a first brush system in contact with one or more of the commutator segments, the first brush system being configured to axially rotate with the rotor; and a second brush system in contact with one or more of the commutator segments, the second brush system being configured to axially rotate with the rotor.

The present disclosure relates to a motor with bidirectional terminals. According to the present disclosure, as the brush terminals are installed on both the left and right sides of the upper surface of the brush card assembly, it is possible to prevent the assembly defects of the motor due to the erroneous assembly of the brush terminals.

The present disclosure relates to a motor with bidirectional terminals. According to the present disclosure, as the brush terminals are installed on both the left and right sides of the upper surface of the brush card assembly, it is possible to prevent the assembly defects of the motor due to the erroneous assembly of the brush terminals.

A drive mechanism including a brushed motor comprises a brushed motor including a commutator having a plurality of commutator segments and a brush contactable to the plurality of commutator segments, a movable member driven by the brushed motor, and a stopper member configured to stop rotation of the brushed motor by contacting the movable member. In a state in which the movable member contacts the stopper member to thereby stop the rotation of the brushed motor, the brush contacts only one of two adjacent commutator segments of the plurality of commutator segments.

A PMDC motor includes a housing, a stator magnet fixed to the inner circumferential surface of the housing, a rotor core received in the housing and facing the stator magnet, and rotor windings wound around the rotor core. The rotor core includes a plurality of rotor teeth, each of the rotor teeth including a tooth body and a tooth tip. A ratio of the outer diameter of the rotor core to an outer diameter of the housing is in the range of 0.6 to 0.67. Compared to the existing PMDC motor, the PMDC motor of the present invention can satisfy the same performance requirement, while reducing the size and weight of the rotor core and hence the weight of the rotor windings. In this way, the total weight and hence the moment of inertia of the rotor is reduced, thereby effectively reducing the noise generated during operation of the motor.

A PMDC motor includes a housing, a stator magnet fixed to the inner circumferential surface of the housing, a rotor core received in the housing and facing the stator magnet, and rotor windings wound around the rotor core. The rotor core includes a plurality of rotor teeth, each of the rotor teeth including a tooth body and a tooth tip. A ratio of the outer diameter of the rotor core to an outer diameter of the housing is in the range of 0.6 to 0.67. Compared to the existing PMDC motor, the PMDC motor of the present invention can satisfy the same performance requirement, while reducing the size and weight of the rotor core and hence the weight of the rotor windings. In this way, the total weight and hence the moment of inertia of the rotor is reduced, thereby effectively reducing the noise generated during operation of the motor.