Claims
- 1. A rotor assembly for a brushless d.c. motor, comprising:
a rotor shaft having at least one permanent magnet mounted thereon; a sleeve accommodating said rotor shaft with said permanent magnet therewithin for a free rotation of said rotor shaft, said sleeve being open at both ends; a flange, said flange being connected with said sleeve at a first end face of said sleeve, a first bearing supporting said shaft; and a second bearing supporting said shaft, wherein a bearing seat for said first bearing is integrated into said flange at said first end face of said sleeve, wherein a bearing seat for said second bearing is integrated into said sleeve at a second end face of said sleeve, and wherein said first and second end faces of said sleeve are enclosed by said flange and said first and second bearings.
- 2. The rotor assembly according to claim 1, wherein said sleeve further comprises a stiffening structure on its outside.
- 3. The rotor assembly according to claim 1, wherein said rotor shaft protrudes from said sleeve at said first end face at said flange.
- 4. The rotor assembly according to claim 1, wherein said sleeve is molded onto said flange.
- 5. The rotor assembly according to claim 1, wherein said sleeve further comprises an essentially cylindrical cup portion engageable with said flange.
- 6. The rotor assembly according to claim 1, wherein said flange further comprises a lid portion terminating said sleeve at said first end face and receiving said first bearing and a flange portion projecting radially outwardly, said flange portion being configured to accomplish mounting of the motor.
- 7. The rotor assembly according to claim 6, wherein said lid portion and said flange portion are formed as an integral element.
- 8. The rotor assembly according to claim 6, wherein said lid portion is made of plastic, wherein said flange portion is made of one of a plastic material and a metal material, and wherein said flange portion is connected to said lid portion.
- 9. The rotor assembly according to claim 1, wherein said flange further comprises a lid portion terminating said sleeve at said first end face and receiving said first bearing, and a casing portion connected to said lid portion and enclosing said motor.
- 10. The rotor assembly according to claim 9, wherein said lid portion is made of plastic, and said casing portion is made of metal and molded into said lid portion.
- 11. The rotor assembly according to claim 10, wherein said casing portion is made of a deep-drawn metal sheet and is injection-coated by said plastic lid portion joining said lid portion with said casing portion.
- 12. An inner-rotor d.c. motor comprising:
a rotor assembly, said rotor assembly further comprising
a rotor shaft having at least one permanent magnet mounted thereon; a sleeve accommodating said rotor shaft with said permanent magnet therewithin for a free rotation of said rotor shaft, said sleeve being open at both ends; a flange, said flange being connected with said sleeve at a first end face of said sleeve, a first bearing supporting said shaft; and a second bearing supporting said shaft; and a stator, wherein a bearing seat for said first bearing is integrated into said flange at said first end face of said sleeve, wherein a bearing seat for said second bearing is integrated into said sleeve at a second end face of said sleeve, wherein said first and second end faces of said sleeve are enclosed by said flange and said first and second bearings, and wherein said stator is inserted over said sleeve of said rotor assembly.
- 13. The inner-rotor d.c. motor according to claim 12, wherein said rotor assembly further comprises a lid portion and a casing portion, and wherein said stator is inserted between said sleeve and said casing portion of said rotor assembly.
- 14. The inner-rotor d.c. motor according to claim 12, wherein said rotor assembly further comprises a stiffening structure on the outside of said sleeve, and wherein an outer contour of said stiffening structure is adapted to an inner contour of said stator.
- 15. The inner-rotor d.c. motor according to claim 12, wherein said motor is resin-embedded.
Priority Claims (1)
Number |
Date |
Country |
Kind |
DE 10051403.0 |
Oct 2000 |
DE |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of PCT Application Serial No. PCT/EP01/10457, filed Sep. 10, 2001 (pending) and claims all rights of priority thereto, the PCT Application in turn claimed priority to German Patent Application Serial No. DE 10051403.0, filed Oct. 17, 2000 (pending).
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/EP01/10457 |
Sep 2001 |
US |
Child |
10413883 |
Apr 2003 |
US |