IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0500466
(1990-03-28)
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발명자
/ 주소 |
- Booth, Dwight E.
- DeYoung, Daniel L.
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
19 인용 특허 :
5 |
초록
▼
An armature assembly for an electromagnetic clutch includes a plastic spider having a central sleeve which is joined to a central driven hub by insert molding. A circular web is molded integrally with and extends radially from the sleeve and carries an annular armature disc which is adapted to coact
An armature assembly for an electromagnetic clutch includes a plastic spider having a central sleeve which is joined to a central driven hub by insert molding. A circular web is molded integrally with and extends radially from the sleeve and carries an annular armature disc which is adapted to coact with the electromagnetic rotor of the clutch. When the clutch is energized, the web flexes adjacent the sleeve in the manner of a living hinge to enable the armature disc to move axially into engagement with the rotor. Upon de-energization of the clutch, the resilient memory of the plastic retracts the armature disc from the rotor. In addition to eliminating the need for separate springs and other components, the plastic spider provides torsional and acoustical dampening.
대표청구항
▼
1. An armature assembly for a selectively energizable and de-energizable electromagnetic coupling, said armature assembly comprising a hub having a central axis, a sleeve telescoped over said hub and captivated against rotational and axial movement relative to said hub, a generally circular web join
1. An armature assembly for a selectively energizable and de-energizable electromagnetic coupling, said armature assembly comprising a hub having a central axis, a sleeve telescoped over said hub and captivated against rotational and axial movement relative to said hub, a generally circular web joined to and projecting radially from said sleeve and having inner and outer margins, the inner margin of said web being formed integrally with said sleeve, and an annular armature disc made of low magnetic reluctance material spaced radially from said hub and joined to said web, said web being axially thinner than said armature disc and being made of resiliently flexible plastic, and a living hinge integral with and located between said web and said sleeve adjacent the inner margin of the web to permit said armature disc to move axially back and forth relative to said hub when said electromagnetic coupling is energized and de-energized. 2. An armature assembly as defined in claim 1 in which said sleeve encapsulates and is bonded to at least a portion of said hub. 3. An armature assembly as defined in claim 2 further including angularly spaced and radially extending lugs formed integrally with said hub, the material of said sleeve filling the angular spaces between said lugs thereby to couple said hub and said sleeve for rotation in unison. 4. An armature assembly as defined in claim 3 in which each of said lugs defines a pair of shoulders which face in oppositely axial directions to captivate said sleeve axially on said hub. 5. An armature assembly as defined in claim 1 further including an annular and axially opening channel of generally C-shaped cross-section formed integrally with the outer margin of said web, said armature disc being secured within said channel. 6. An armature assembly as defined in claim 5 further including axially extending and angularly spaced holes formed in said armature disc, axially extending and angularly spaced pins formed integrally with said channel and projecting axially from said channel and through said holes, said pins having free ends, and means integral with the free ends of said pins for captivating said armature disc in said channel. 7. An armature assembly as defined in claim 1 in which said armature disc comprises a series of circumferentially extending and radially spaced rings which define poles, there being an axially enlarged portion integral with the outer margin of said web and made of the same material as said web, the material of said enlarged portion encapsulating portions of said rings and at least partially filling the spaces between said rings so as to captivate said rings and join said rings to said web. 8. An armature assembly for a selectively energizable and de-energizable electromagnetic coupling, said armature assembly comprising a hub having a central axis, a sleeve telescoped over said hub and captivated against rotational and axial movement relative to said hub, a generally circular web projecting radially from said sleeve and having an inner margin formed integrally with said sleeve, an annular and axially opening channel of generally C-shaped cross-section formed integrally with the outer margin of said web, and an annular armature disc made of low magnetic reluctance material captivated in said channel, said web being made of resiliently yieldable material and being sufficiently flexible to permit said armature disc to move axially back and forth relative to said hub and said sleeve when said electromagnetic coupling is energized and de-energized. 9. An armature assembly as defined in claim 8 further including angularly spaced and radially extending lugs formed integrally with said hub, each of said lugs defining a pair of shoulders which face in opposite axial directions, the material of said sleeve encapsulating said shoulders and filling the angular spaces between said lugs so as to captivate said sleeve against axial and rotational movement on said hub. 10. An armature assembly as defined in claim 8 further including axially extending and angularly spaced holes formed in said armature disc, axially extending and angularly spaced pins formed integrally with said channel and projecting axially from said channel and through said holes, said pins having free ends, and means on the free ends of said pins for captivating said armature disc axially in said channel. 11. An armature assembly as defined in claim 8 in combination with an electromagnetic field member having an axially facing and radially extending friction face, said armature disc being selectively movable into engagement with said friction face, inner and outer circumferentially extending lips extending axially from said friction face toward said armature disc, said disc being disposed radially between said lips and being retained loosely by said lips in the event said disc separates from said channel. 12. An armature assembly as defined in claim 8 in combination with an electromagnetic field member having an axially facing and radially extending friction face located adjacent one side of said channel, said armature disc being selectively movable into engagement with said friction face, and a retention member secured to and extending radially from said hub and disposed in opposing relation with the other side of said channel, said retention member coacting with said friction face to retain said web, said channel and said armature disc axially in the event said web separates from said sleeve. 13. An armature assembly as defined in claim 12 further including axially adjustable bumper means on said retention member for establishing a predetermined axial spacing between said armature disc and said friction face. 14. An armature assembly for a selectively energizable and de-energizable electromagnetic coupling, said armature assembly comprising a hub having a central axis, a web joined to and projecting radially from said hub and having an outer margin, an annular and axially opening channel of generally C-shaped cross-section formed integrally with the outer margin of said web, an annular armature disc made of low magnetic reluctance material spaced radially from said hub and located within said channel, axially extending and angularly spaced holes formed in said armature disc, axially extending and angularly spaced pins formed integrally with said channel and projecting axially from said channel and through said holes, said pins having free ends, means integral with the free ends of said pins for captivating said armature disc in said channel, and said web being made of resiliently flexible material to permit said armature disc to move axially back and forth relative to said hub when said electromagnetic coupling is energized and de-energized. 15. An armature assembly for a selectively energizable and de-energizable electromagnetic coupling, said armature assembly comprising a hub having a central axis, a web joined to and projecting radially from said hub and having an outer margin, an annular armature disc made of low magnetic reluctance material spaced radially from said hub and joined to said web, said web being made of resiliently flexible material to permit said armature disc to move axially back and forth relative to said hub when said electromagnetic coupling is energized and de-energized, said armature disc comprising a series of circumferentially extending and radially spaced rings which define poles, there being an axially enlarged portion integral with the outer margin of said web and made of the same material as said web, the material of said enlarged portion encapsulating portions of said rings and at least partially filling the spaces between said rings so as to captivate said rings and join said rings to said web.
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