Motor with internal driver

摘要

A motor with an internal driver having a shell, having a stator, a rotor and a drive shaft attached to said rotor in an internal thereof; a front cover; a rear cover; ends of a drive shaft penetrating through holes of the front and rear covers to the external. The inner surface of the rear cover includes outer and inner circumferential walls and a receiving space defined by the outer and inner circumferential walls and the inner surface of the rear cover. A driver is provided within said receiving space and the outer surface of the rear cover is provided with a bearing slot to receive a bearing. An inner diameter of the inner circumferential wall is greater than the drive shaft. Said inner diameter of said inner circumferential wall is smaller than the annular diameter of the bearing in the bearing slot.

主权项

1. A motor with an internal driver, comprising:
a shell, having a stator, a rotor and a drive shaft attached to said rotor in an internal thereof; a front cover, covering a front end of said shell, and said front cover having a through hole formed thereon; a rear cover, covering a rear end of said shell, and defining an inner surface on a side attached to said internal of said shell and an outer surface on another side exposed externally, said rear cover having a through hole formed thereon; two ends of said drive shaft penetrating said through holes of said front and rear covers respectively and exposed externally; characterized in that: said inner surface of said rear cover comprises an outer circumferential wall provided on an edge thereof, and an inner circumferential wall provided on an edge of said through hole; a receiving space is defined by said outer circumferential wall, said inner surface of the rear cover and said inner circumferential wall; a driver arranged within said receiving space comprises a circuit board and a plurality of electronic components, said circuit board and said rear cover being parallel; said outer surface of the rear cover is provided with a bearing slot indented inwardly to receive a bearing therein, and said bearing slot is aligned with said through hole of said rear cover; an inner diameter of said inner circumferential wall is greater than the drive shaft to allow said drive shaft to pass therethrough, and said inner diameter of said inner circumferential wall is smaller than an annular diameter of said bearing received within said bearing slot, an external diameter of the inner circumferential wall of the rear cover is smaller than a diameter of the bearing slot.