The present invention allows for the pack clearance of a clutch pack to be adjusted during the manufacturing process to the proper amount, even if there are variations in friction disc thickness and steel disc thickness. The present invention is an electromagnetic clutch having an adjustable pack cl
The present invention allows for the pack clearance of a clutch pack to be adjusted during the manufacturing process to the proper amount, even if there are variations in friction disc thickness and steel disc thickness. The present invention is an electromagnetic clutch having an adjustable pack clearance arrangement, comprising an output shaft, a pressure plate, and a clutch pack actuated by the pressure plate. The pressure plate and the clutch pack are splined to the output shaft. There is also a clutch housing splined to the clutch pack, which also receives force from the clutch pack when the pressure plate is applied. The pressure plate defines a pack clearance for the clutch pack, and the pack clearance is adjustable by a pack clearance adjusting arrangement.
대표청구항▼
What is claimed is: 1. An electromagnetic clutch assembly having an adjustable pack clearance arrangement,comprising: an output shaft; a pressure plate; a clutch pack at a first side engageable with said pressure plate, wherein said pressure plate and clutch pack are splined to said output shaft; a
What is claimed is: 1. An electromagnetic clutch assembly having an adjustable pack clearance arrangement,comprising: an output shaft; a pressure plate; a clutch pack at a first side engageable with said pressure plate, wherein said pressure plate and clutch pack are splined to said output shaft; a clutch housing splined to said clutch pack, engageable with said clutch pack on a second side, wherein said pressure plate defines a pack clearance for said clutch pack; a base cam having a threaded inner surface engaged with a threaded plate, said threaded plate supported by bearings on said output shaft; and wherein upon rotation of said threaded plate in a clockwise or counterclockwise direction, said base cam will translate axially along said output shaft, changing the pack clearance of said clutch pack. 2. An electromagnetic clutch assembly having an adjustable pack clearance arrangement, comprising: an output shaft; a pressure plate; a clutch pack at a first side engageable with said pressure plate, wherein said pressure plate and clutch pack are splined to said output shaft; a clutch housing splined to said clutch pack, engageable with said clutch pack on a second side, wherein said pressure plate defines a pack clearance for said clutch pack; said pressure plate having a first element featuring a series of adjustment stops; and said pressure plate having a second element featuring a series of corresponding recesses for receiving said adjustment stops, wherein upon which indexing said first element relative to said second element, a displacement occurs between said first element and said second element, adjusting the pack clearance. 3. An electromagnetic clutch assembly having an adjustable pack clearance arrangement, comprising: an output shaft; a pressure plate; a clutch pack at a first side engageable with said pressure plate, wherein said pressure plate and clutch pack are splined to said output shaft; a clutch housing splined to said clutch pack, engageable with said clutch pack on a second side, wherein said pressure plate defines a pack clearance for said clutch pack; a cam plate having a helical ramp surface on a first side; and said pressure plate having a helical ramp surface that contacts said helical ramp of said cam plate, wherein said cam plate can be indexed on said output shaft so said helical ramp moves said pressure plate to either increase or decrease said pack clearance. 4. An electromagnetic clutch assembly having a variable pack clearance, comprising: an output shaft; a clutch pack positioned on said output shaft, having a pressure plate; a ball ramp assembly operably associated with said output shaft having a base cam and a cam plate, said base cam having one or more cam surfaces on a first side, and said cam plate having one or more cam surfaces on a first side, and a second side resting against said pressure plate; one or more balls held in position by said cam surfaces of said base cam and said cam plate, in which said base cam and said cam plate will axially displace apart along said output shaft upon relative motion therebetween said base cam and said cam plate, causing pressure to be applied to said pressure plate, engaging said clutch pack; said base cam having a threaded inner surface; a threaded plate supported by bearings on said output shaft; and said base cam being threaded onto said threaded plate, wherein upon rotation of said threaded plate, said base cam will translate axially along said output shaft, causing said pack clearance of said clutch pack to increase or decrease. 5. An electromagnetic clutch assembly having a variable pack clearance, comprising: an output shaft; a clutch pack positioned on said output shaft, having a pressure plate; a ball ramp assembly operably associated with said output shaft having a base cam and a cam plate, said base cam having one or more cam surfaces on a first side, and said cam plate having one or more cam surfaces on a first side, and a second side resting against said pressure plate; one or more balls held in position by said cam surfaces of said base cam and said cam plate, in which said base cam and said cam plate will axially displace apart along said output shaft upon relative motion therebetween said base cam and said cam plate, causing pressure to be applied to said pressure plate, engaging said clutch pack; a first element of said pressure plate having a set of adjustment stops; and a second element of said pressure plate having a set of corresponding recesses for receiving said adjustment stops, wherein indexing said first element relative to said second element causes axial displacement to occur between said first element and said second element, adjusting said pack clearance. 6. An electromagnetic clutch assembly having a variable pack clearance, comprising: an output shaft; a clutch pack positioned on said output shaft, having a pressure plate; a ball ramp assembly operably associated with said output shaft having a base cam and a cam plate, said base cam having one or more cam surfaces on a first side, and said cam plate having one or more cam surfaces on a first side, and a second side resting against said pressure plate; one or more balls held in position by said cam surfaces of said base cam and said cam plate, in which said base cam and said cam plate will axially displace apart along said output shaft upon relative motion therebetween said base cam and said cam plate, causing pressure to be applied to said pressure plate, engaging said clutch pack; said cam plate having a helical ramp surface; and said pressure plate having a helical ramp surface which contacts said helical ramp surface of said cam plate, wherein upon indexing said cam plate on said output shaft, said pressure plate will translate axially along said output shaft causing displacement to occur between said cam plate and said pressure plate, adjusting said pack clearance. 7. A clutch assembly having an adjustable pack clearance, comprising: a clutch pack mounted on an output shaft; a pressure plate for applying said clutch pack; a cam plate splined to said output shaft having a first side with one or more cam surfaces and a second side in contact with said pressure plate; a base cam free to rotate upon said output shaft, having one or more cam surfaces on a first side which are complementary to said cam surfaces on said cam plate, wherein said first side of said cam surfaces are operably engageable to said one or more cam surfaces of said cam plate when said clutch assembly is engaged, and relative rotation of said base cam in relation to said cam plate will cause axial displacement of said cam plate, and said pressure plate, applying said clutch pack; and a threaded plate resting against a bearing mounted on said output shaft and said base cam having a threaded inner surface threaded onto said threaded plate. 8. The pack clearance adjusting arrangement of claim 7, wherein translating said base cam in an axial direction by rotating said base cam on said threaded plate will adjust said pack clearance of said clutch pack. 9. The clutch assembly having an adjustable pack clearance of claim 7, wherein said base cam is operably engageable to said cam plate by a series of balls held in place by said one or more cam surfaces of said cam plate and said one or more surfaces of said base cam. 10. The clutch assembly having an adjustable pack clearance of claim 9, wherein said series of balls will rotate along said one or more cam surfaces of said base cam and said one or more cam surfaces of said cam plate upon relative rotation between said base cam and said cam plate. 11. A clutch assembly having an adjustable pack clearance, comprising: a clutch pack mounted on an output shaft; a pressure plate for applying said clutch pack; a cam plate splined to said output shaft having a first side with one or more cam surfaces and a second side in contact with said pressure plate; a base cam free to rotate upon said output shaft, having one or more cam surfaces on a first side which are complementary to said cam surfaces on said cam plate, wherein said first side of said cam surfaces are operably engageable to said one or more cam surfaces of said cam plate when said clutch assembly is engaged, and relative rotation of said base cam in relation to said cam plate will cause axial displacement of said cam plate, and said pressure plate, applying said clutch pack; and said pressure plate having a first element with a series of adjustment stops circumscribing the inner surface of said first element and a second element with a series of recesses circumscribing the inner surface of said second element. 12. The pack clearance adjusting arrangement of claim 11, wherein said series of recesses on said second element are used for receiving said adjustment stops of said first element. 13. The clutch pack having a pack clearance adjusting arrangement of claim 12, wherein said apparatus is comprised of said cam plate having a helical ramp surface in contact with a corresponding helical ramp surface of said pressure plate. 14. The pack clearance adjusting arrangement of claim 13, wherein upon indexing said cam plate on said output shaft, said helical ramp on said pressure plate and said helical ramp on said cam plate will cause said pressure plate to translate axially along said output shaft, adjusting said pack clearance. 15. The pack clearance adjusting arrangement of claim 11, wherein upon indexing said first element relative to said second element, said first element will translate along said output shaft relative to said second element, adjusting said pack clearance. 16. The clutch assembly having an adjustable pack clearance of claim 11, wherein said base cam is operably engageable to said cam plate by a series of balls held in place by said one or more cam surfaces of said cam plate and said one or more surfaces of said base cam. 17. The clutch assembly having an adjustable pack clearance of claim 16, wherein said series of balls will rotate along said one or more cam surfaces of said base cam and said one or more cam surfaces of said cam plate upon relative rotation between said base cam and said cam plate.
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이 특허에 인용된 특허 (7)
Robert L. Gosda, Automatic brake clearance adjuster.
Watson Will (Southfield MI) Miller Alan L. (Ithaca NY) Sundquist Drew A. (Canton MI) Simpson Roger T. (Ithaca NY) Ducklow Diane K. (Farmington MI) Beckerman Joseph W. (Livonia MI) Showalter Dan J. (P, On demand vehicle drive system.
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