Patent ID: 9583994
Date: 2017-02-28
CPC Classifications: H02K

Claim:
1. A motor with a shaft integrated sensing magnet, the motor comprising: a rotation shaft having an alignment groove at a distal end and a set of teeth at the other end thereof; a sensing magnet disposed at the distal end of the rotation shaft; a rotor including a magnet coupled to a periphery of the rotation shaft; and a stator including a core wrapping an ambient of the rotor and wound with a coil; wherein the alignment groove takes a shape of a circle when viewed from above and is concavely formed from an upper surface of the rotation shaft in a depth at least as great as a height of the sensing magnet; wherein the sensing magnet takes a shape corresponding to that of the alignment groove, and an entire outer lateral surface of the sensing magnet contacts an inner surface the alignment groove such that the sensing magnet is completely accommodated within the alignment groove; wherein a rotation center of the alignment groove matches a rotation center of the rotation shaft; wherein the sensing magnet is completely press-fitted into the alignment groove via an adhesive such that a rotation center of the sensing magnet matches the rotation center of the rotation shaft without a separate jig, wherein the sensing magnet is inhibited from being disengaged from the rotation shaft at a high speed; and wherein an upper surface of the sensing magnet is arranged on a same planar surface as that of the distal end of one side of the rotation shaft.