Patent ID: 9705380
Date: 2017-07-11
CPC Classifications: H02K

Claim:
1. An electric motor equipped with deceleration device comprising: an electric motor comprising: a motor housing which is in the shape of a circular cylinder having a bottom portion, motor magnets that are disposed on an internal wall of the motor housing, an armature that is rotatably disposed on an inner side of the motor magnets inside the motor housing, and a power supply device that has brushes and is configured to supply current to the armature; a deceleration device having an output component that decelerates and then outputs a rotation of the armature of the electric motor; and a main shaft component that is formed substantially in a circular rod shape, and has one end portion that is fixed to a substantial center of the bottom portion of the motor housing and another end portion that protrudes towards an outer side through an aperture in the motor housing, and the main shaft component being fixed to the motor housing with the one end portion, wherein the armature is disposed inside the motor housing so as to be on the same axis as the main shaft component and so as to surround the main shaft component, the deceleration device is disposed between the armature and the other end portion of the main shaft component so as to surround the main shaft component, and the output component, which is formed in a toroidal shape, is disposed on the same axis as the main shaft component so as to surround the main shaft component, the one end portion of the main shaft component is covered with the bottom portion of the motor housing, the deceleration device is provided with a fixed gear that is fixed to the motor housing on the same axis as the main shaft component, the fixed gear is attached to a main body component that is formed between the armature and the deceleration device, the armature is provided with an armature shaft, an armature core that is fixed to an outer circumferential surface of the armature shaft by being fitted around the outside thereof, insulators that are disposed on both end surfaces of the armature core, coils, and a commutator, a plurality of teeth that are disposed at the same pitch from each other are formed on the armature core, the coils are formed by winding in tightly concentrated winds onto the plurality of teeth from an outside of the insulators, a fixing portion of the motor housing in which the one end portion of the main shaft component is fixed, is folded, the main shaft component is fixedly arranged directly only at one position of the one end portion of the main shaft component, the deceleration device includes a fixed internal gear and a swing gear, an output gear is provided on the output component, the swing gear is axially supported so as to be freely rotatable on an eccentric component that is positioned eccentrically relative to the armature shaft, an external gear and an internal gear are provided on the swing gear, and the external gear is positioned so as to be capable of meshing with the fixed internal gear and rolling around inside the fixed internal gear, while the internal gear is positioned so as to be capable of meshing with the output gear and rolling around the output gear.