Hub motor

Abstract

The invention relates to a hub motor comprising a stator unit, a rotor unit, a magnetic ring and a sensing circuit unit. The rotor unit is provided with a shaft part which can be relatively and rotatably penetrates through the stator unit; the magnetic ring and the sensing circuit unit are arranged on the rotor unit and the stator unit respectively and are correspondingly positioned at intervals between the rotor unit and the stator unit; and the magnetic ring is provided with a first ring piece extending radially and a second ring piece which is connected with the first ring piece and extends axially. With the structural design of the magnetic ring, the problems of eccentric rotation and axial displacement generated in the process that the magnetic ring rotates with the rotor unit can be avoided; and as the magnetic ring and the sensing circuit unit are arranged between the rotor unit and the stator unit and are wrapped and fixed by both the rotor unit and the stator unit, on the one hand, the structure stability that the magnetic ring is combined with the rotor unit is increased so as to resist the centrifugal force generated by high speed rotation, and on the other hand, the magnetic ring can be prevented from being polluted and interfered by the outside, and the cost for additional arrangement of an outer cover is saved.

Description

technical field [0001] The present invention relates to a motor, in particular to a DC brushless wheel hub motor. Background technique [0002] In the conventional brushless DC motor structure (such as the structure disclosed in Taiwan Model Certificate No. M358466), the electromagnet and the Hall sensing element are arranged outside the motor body, and are covered by a motor cover. However, This approach requires extra cost of the motor cover. In addition, since the electromagnet is sleeved on the rotating shaft of the motor and rotates with the rotor of the motor, when the stability of the electromagnet setting is insufficient, it is easy to follow the motor. During the rotation of the rotor, eccentricity or axial displacement occurs due to shaking, thus affecting the sensing effect of the Hall sensing component. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a DC brushless motor that solves the aforementioned defects, and the DC br...

AI Technical Summary

Problems solved by technology

[0002] In the conventional brushless DC motor structure (for example, the structure disclosed by Taiwan New Certificate No. M358466), the electromagnet and the Hall sensor assembly are arranged outside the motor body and covered by a motor cover. However, Such an approach requires extra cost for the motor cover. In addition, since the electromagnet is sleeved on the shaft of the motor and rotates with the rotor of the motor, when the stability of the electromagnet setting is not enough, it is easy to follow the motor. During the rotation of the rotor, eccentricity or axial displacement occurs due to shaking, thus affecting the sensing effect of the Hall sensing component

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