External-rotor motor having a stationary bearing shaft
An improved drum motor, preferably electronically commutated, features a unitary stationary central shaft ( 18 ) supporting a stationary inner stator ( 52 ), and an external rotor ( 49 ), including permanent magnets ( 54 ), secured to an inner surface of a generally cylindrical rotatable casing part...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | An improved drum motor, preferably electronically commutated, features a unitary stationary central shaft (
18
) supporting a stationary inner stator (
52
), and an external rotor (
49
), including permanent magnets (
54
), secured to an inner surface of a generally cylindrical rotatable casing part (
18
). This permits variable speed operation while avoiding any need for an internal gear linkage. Safety is improved by making sealing plates (
76, 78
) at respective axial ends of the casing (
14
) stationary, and providing an annular peripheral seal (
90
) around each sealing plate. Respective rolling bearings (
24, 44
) near each end of the casing (
14
) facilitate rotation of the external rotor (
49
) relative to the stator (
52
), and a clamping arrangement (
30
) minimizes noise from the bearings. |
|---|