The present invention provides a motor comprising: a rotary shaft; a rotor including a hole in which the rotary shaft is disposed; a stator disposed on the outer side of the rotor; and a housing for accommodating the rotor and the stator, and further comprising a rectifier having a hole in which the rotary shaft is disposed, wherein the housing includes a cover plate, the cover plate includes a brush coming into contact with the rectifier, and the front surface of the brush includes a curved part coming into contact with the rectifier, and a cutting part formed to be bent from the curved part such that the cutting part does not come into contact with the rectifier, thereby providing an advantageous effect of inhibiting the worn foreign material of the brush from being generated on a contact portion between the brush and the rectifier during the initial driving of the motor.

The present invention provides a motor comprising: a rotary shaft; a rotor including a hole in which the rotary shaft is disposed; a stator disposed on the outer side of the rotor; and a housing for accommodating the rotor and the stator, and further comprising a rectifier having a hole in which the rotary shaft is disposed, wherein the housing includes a cover plate, the cover plate includes a brush coming into contact with the rectifier, and the front surface of the brush includes a curved part coming into contact with the rectifier, and a cutting part formed to be bent from the curved part such that the cutting part does not come into contact with the rectifier, thereby providing an advantageous effect of inhibiting the worn foreign material of the brush from being generated on a contact portion between the brush and the rectifier during the initial driving of the motor.

The invention relates to a commutator, comprising an insulating base and a plurality of commutator segments arranged on the insulating base, wherein each commutator segment comprises a metal layer, a transition layer and a graphite layer arranged on the base in sequence. The transition layer contains a material identical to that of the graphite layer and a material identical to that of the metal layer. The invention further relates to a motor comprising the commutator and a method for manufacturing the commutator. As the transition layer contains the material identical to that of the graphite layer and the metal layer, the problem that the graphite layer and the metal layer are cracked during high temperature sintering is resolved. The service life of the commutator is prolonged. The method for manufacturing the commutator reduces chemical contamination and production cost caused by electroplating and brazing used in a traditional technology.

The present invention relates to monolithic structures for use as an electrical contact. In particular, these structures are formed from a laminate alloy, which in turn is composed of a M.sub.n+1AX.sub.n compound. Electrical contact assemblies and electrical components having such contacts are also described herein. In some example, such monolithic structures display increased wear resistance, which is useful for sliding electrical contacts.

The present invention relates to monolithic structures for use as an electrical contact. In particular, these structures are formed from a laminate alloy, which in turn is composed of a M.sub.n+1AX.sub.n compound. Electrical contact assemblies and electrical components having such contacts are also described herein. In some example, such monolithic structures display increased wear resistance, which is useful for sliding electrical contacts.

A commutator includes a cylindrical insulator and commutator pieces, which are formed on the outer circumferential surface of the insulator and arranged side by side in the circumferential direction of the insulator. The commutator pieces are each composed of a conductive plate material, and each includes a connection claw and an engagement claw. The connection claw extends outward in the radial direction of the insulator while being configured to electrically being connected to an armature coil. The engagement claw extends inward in the radial direction of the insulator and engages with the insulator. The commutator pieces each include a recess portion with an undercut formed in a surface facing inward in the radial direction of the insulator.

A commutator includes a cylindrical insulator and commutator pieces, which are formed on the outer circumferential surface of the insulator and arranged side by side in the circumferential direction of the insulator. The commutator pieces are each composed of a conductive plate material, and each includes a connection claw and an engagement claw. The connection claw extends outward in the radial direction of the insulator while being configured to electrically being connected to an armature coil. The engagement claw extends inward in the radial direction of the insulator and engages with the insulator. The commutator pieces each include a recess portion with an undercut formed in a surface facing inward in the radial direction of the insulator.

A motor structure for an electric wheelchair, includes a housing, a front cover, a rear cover, a rotating shaft, a rotor, a commutator sleeved on the rotating shaft and electrically connected to the rotor, and a brush power terminal fixed to the front cover and in contact with the commutator, and further including a plurality of tile-shaped magnets surrounding the rotor, a cross-section of each tile-shaped magnet is a symmetric structure about an axis thereof, each tile-shaped magnet includes an inner curved surface and an outer curved surface, and the centre of the circle corresponding to the inner curved surface and the centres of circles corresponding to the outer curved surface lie on a straight line and are distanced apart.

A motor structure for an electric wheelchair, includes a housing, a front cover, a rear cover, a rotating shaft, a rotor, a commutator sleeved on the rotating shaft and electrically connected to the rotor, and a brush power terminal fixed to the front cover and in contact with the commutator, and further including a plurality of tile-shaped magnets surrounding the rotor, a cross-section of each tile-shaped magnet is a symmetric structure about an axis thereof, each tile-shaped magnet includes an inner curved surface and an outer curved surface, and the centre of the circle corresponding to the inner curved surface and the centres of circles corresponding to the outer curved surface lie on a straight line and are distanced apart.

Provided is a rotor of a brushed motor capable of reducing the occurrence of contamination during press-fitting of a commutator onto a knurling and reducing defect factors due to rotor contamination to improve productivity. In a rotor of a brushed motor having a commutator press-fitted onto a knurling of a shaft, an inclined surface is provided on an inner circumferential side of the commutator, and an angle of the inclined surface is configured to be smaller than an angle of an axial end portion of the knurling. The knurling may be configured to be at a position different from a shaft stepped end surface of the shaft and the knurling may be configured to be positioned axially inward of the commutator from an end surface of the commutator.