Rotor and motor
AssigneeMabuchi Motor Co., Ltd.
InventorsYasuhiro HASHIMOTO, Hideyuki UZAWA, Keiji NAKAMURA
Life of this patent
Estimating the term…
Abstract
A rotor is provided with: a rotor core which rotates integrally with a shaft and has a plurality of radially extending teeth; windings including coil portions wound around the teeth; a commutator that is attached to the rotor core and integrally rotates with the shaft, the commutator including metal commutator segments having contact portions with which precious metal brushes make sliding contact, and a plurality of terminals to which the windings are bonded; elements which include capacitors and respectively electrically connecting terminals to which both ends of the coil portions of the same phase are connected; and a coating layer formed of an oil applied to the contact portions. A motor includes this rotor.
Claims6
A rotor comprising:
- a rotor core that rotates integrally with a shaft and includes a plurality of radially extending teeth;
- a winding including a coil portion wound around the teeth;
- a commutator that is attached to the rotor core and rotates integrally with the shaft, the commutator including a contact portion with which precious metal brushes make sliding contact, and a metal commutator segment having a plurality of terminals to which the winding is bonded;
- an element including a capacitor and respectively electrically connecting the terminals to which both ends of the coil portion of the same phase are connected;
- and
- a coating layer formed of an oil applied to the contact portion.
A motor comprising:
- a rotor core that rotates integrally with a shaft and includes a plurality of radially extending teeth;
- a winding including a coil portion wound around the teeth;
- a commutator that is attached to the rotor core and rotates integrally with the shaft, the commutator including a contact portion with which precious metal brushes make sliding contact, and a metal commutator segment having a plurality of terminals to which the winding is bonded;
- an element including a capacitor and respectively electrically connecting the terminals to which both ends of the coil portion of the same phase are connected;
- a coating layer formed of an oil applied to the contact portion;
- a stator which includes a permanent magnet fixed to an inner peripheral surface of a bottomed and tubular housing, and rotatably supports one end of the shaft;
- and
- an end bell having the precious metal brushes and fixed to an opening portion of the housing.
Dependencies are inferred from the claim text.