Braking or clutching device
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0742185
(2007-04-30)
|
등록번호 |
US-7717241
(2010-06-10)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- American Precision Industries, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
An electric braking or clutching device includes a housing; an armature having an axis and disposed at the housing, the armature and the housing defining a radial air gap therebetween; and a coil configured to generate, when energized, a magnetic field at the housing and armature, a flux path of the
An electric braking or clutching device includes a housing; an armature having an axis and disposed at the housing, the armature and the housing defining a radial air gap therebetween; and a coil configured to generate, when energized, a magnetic field at the housing and armature, a flux path of the field extending from the coil into the armature, from the armature into the housing, and from the housing back to the coil, with the direction of the flux path from the armature into the housing being substantially radial in orientation.
대표청구항
▼
What is claimed is: 1. An electric braking or clutching device comprising: a set of thrust washers; a set of friction disks, with the thrust washers being interleaved between the friction disks; a housing; an armature having an axis and disposed at the housing, the armature and the housing defining
What is claimed is: 1. An electric braking or clutching device comprising: a set of thrust washers; a set of friction disks, with the thrust washers being interleaved between the friction disks; a housing; an armature having an axis and disposed at the housing, the armature and the housing defining a radial air gap therebetween, with the armature defining an interior cavity therein and supporting the set of thrust washers in the interior cavity for longitudinal movement relative to the armature but against rotational movement relative to the armature; a shaft rotationally mounted in the housing and armature for rotation relative thereto, and carrying the set of friction disks thereon for longitudinal movement relative to the shaft but against rotational movement relative to the shaft; and a coil positioned at least in substantial part radially outwardly of the set of friction disks and the set of thrust washers and configured to generate, when energized, a magnetic field at the housing and armature, a flux path of the field extending from the coil into the armature, from the armature into the housing, and from the housing back to the coil, with the direction of the flux path from the armature into the housing being substantially radial in orientation, wherein the air gap is of a substantially fixed, radial dimension irrespective of wear of the device and the sets of friction discs and thrust washers are held substantially contained within the cavity of the armature. 2. An electric braking or clutching device as claimed in claim 1 wherein the armature includes a portion that is generally radially concentric with the coil. 3. An electric braking or clutching device as claimed in claim 1 wherein the armature includes a portion that is generally radially concentric with the housing and is positioned radially inwardly of the outer surface of the housing. 4. An electric braking or clutching device as claimed in claim 2 wherein the armature includes a planar portion and the radially concentric portion is a ring extending axially therefrom to define the internal cavity of the armature. 5. An electric braking or clutching device as claimed in claim 1 wherein the friction disks are disposed between the housing and the armature. 6. An electric braking or clutching device as claimed in claim 5 wherein the friction disks are subjected to an axial compressive load when the coil is energized. 7. An electric braking or clutching device as claimed in claim 1 wherein the friction disks are rotationally supported on the shaft by a non-circular shaped opening therein complementary to a portion of the shaft of non-circular cross-section in shape. 8. An electric braking or clutching device as claimed in claim 1 wherein the thrust washers are secured to an interior surface of the armature defining the interior cavity therein. 9. An electric braking or clutching device as claimed in claim 1 wherein the direction of the flux path from the housing into the armature is substantially radial. 10. An electric braking or clutching device as claimed in claim 1, wherein the flux path of the magnetic field extends across the radial air gap in a direction that is more radial than axial, when the coil is energized. 11. An electric braking or clutching device as claimed in claim 1 wherein the radial air gap is maintained at a generally constant radial dimension, upon movement of the armature relative to the housing in an axial direction thereof. 12. An electric braking or clutching device as claimed in claim 11 wherein the air gap is positioned radially inwardly of an outer surface of the housing. 13. An electric braking or clutching device as claimed in claim 1 wherein the air gap is located out of a wear path of the device. 14. An electric braking or clutching device as claimed in claim 1 further comprising a cover through which the shaft extends and having a cavity receiving the armature. 15. An electric braking or clutching device as claimed in claim 14 wherein the cover extends radially outwardly of the coil. 16. An electric braking or clutching device as claimed in claim 14 wherein the cover extends longitudinally past the sets of friction disks and thrust washers to further contain them within the interior of the device. 17. An electric braking or clutching device, comprising: a set of interleaved thrust washers and friction disks; a housing; an armature, having an interior cavity, which is mounted for axial movement relative to the housing, which is disposed to define a radial air gap with the housing with a substantially fixed radial dimension, and which supports the thrust washers to be contained in the interior cavity and to be longitudinally movable and rotationally fixed relative to the armature; a shaft, rotationally mounted in the housing and the armature, on which the friction disks are mounted to be contained within the interior cavity and to be longitudinally movable and rotationally fixed relative to the shaft; and a coil, partially positioned radially outwardly of the friction disks the thrust washers, to generate a magnetic field having a flux path extending from the coil to the armature, the armature to the housing, and from the housing to the coil, with a direction of the flux path from the armature to the housing being oriented substantially radially.
이 특허에 인용된 특허 (10)
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Roll Thomas P. (Janesville WI), Apparatus and method for controlling the engagement of a gap-type electromagnetic coupling and for alleviating engagemen.
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Appelqvist,Roger L. E., Brake.
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Jolly, Mark R.; Marjoram, Robert H.; Koester, Steve; St. Clair, Kenneth A., Brake with field responsive material.
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Landrieve, Franck, Braked bearing.
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DeRoos, Bradley G.; Ebersole, Jr., Harvey N., Braking system.
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Kyle M. Muramoto, Combined parking and service brake.
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MacDonald J. G. Fraser (Rockford IL), Electromagnetic clutch having a contractible friction shoe.
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Sekiya, Shigenobu; Shionoya, Yosuke, Magnetic flux detector with resistance of its potential setup resistor set larger than that of its search coil.
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Thebault Jacques (Bordeaux FRX) Laxague Michel (Bordeaux FRX) Rey Jacques (Merignac FRX) Delaval Rodolphe (St. Martin au Laert FRX) Palavit Gerard (Douai FRX), Method for applying an anti-oxidative coating on brake disks of a carbon-containing composite material.
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Bieker, Guido; Dörner, Heinz Dieter, Reduction of torsional vibration in rail vehicle wheel sets.
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