Johnson Electric S.a.

Johnson Electric International Ag

Chi Keung Law

Ming Cen Lu

James Ching Sik Lau

Tao Fu

Ngai Ming Leung

Xi Ping Yang

A low-voltage direct current motor has a stator and a rotor rotatable relative to the stator. The rotor includes a rotary shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft adjacent to the rotor core, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator includes a round housing, a permanent magnet mounted to an inner surface of the housing, and brushes disposed in sliding contact with the commutator. An input voltage of the motor is in the range of 7 to 36V, and a ratio of an outer diameter of the rotor core to an outer diameter of the housing is in the range of 67% to 75%.

Low-voltage direct current motor

A fastening device for a rolling bearing includes a bearing mounting portion disposed at an end of a motor housing, a rolling bearing received in the mounting portion, and a retainer ring disposed between an inner peripheral surface of the mounting portion and a peripheral surface of an outer ring of the rolling bearing. The rolling bearing is fastened to the motor housing by the retainer ring. The retainer ring is resiliently deformable in the radial direction of the rolling bearing.

Retainer for a rolling bearing

An electric motor has a rotor and a stator. The stator has an endcap with two brush assemblies, two brush brackets for holding the brush assemblies and two electrical terminals. Each brush assembly is detachably mounted to its brush bracket and has a brush holder, a brush slidably received in the brush holder, a spring for urging the brush out of the brush holder, and a conductive member electrically connecting the brush with a corresponding electrical terminal via a resilient releasable connection.

Growing community of inventors

Hong Kong, China

Chi Keung Law