Viscous clutch with adjustable pump mechanism
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16D-035/02
F16D-035/00
F16H-047/06
F16H-047/00
출원번호
US-0657738
(2015-03-13)
등록번호
US-9618059
(2017-04-11)
발명자
/ 주소
Schmidt, Thomas
Brand, Bastian
Miller, Scott
출원인 / 주소
Horton, Inc.
대리인 / 주소
Westman, Champlin & Koehler, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
58
초록▼
A viscous clutch (20) includes a housing assembly (28), a rotor assembly (26), a reservoir (38) to hold a supply of a shear fluid, a working chamber (40) operatively positioned between the housing assembly and the rotor assembly, and a fluid return bore (26-1B) that optionally extends radially throu
A viscous clutch (20) includes a housing assembly (28), a rotor assembly (26), a reservoir (38) to hold a supply of a shear fluid, a working chamber (40) operatively positioned between the housing assembly and the rotor assembly, and a fluid return bore (26-1B) that optionally extends radially through at least an outer diameter portion of the rotor assembly to the working chamber. Selective introduction of the shear fluid to the working chamber facilitates selective torque transmission between the housing assembly and the rotor assembly. The fluid return bore can form at least a portion of a fluid return path (50) from the working chamber to the reservoir.
대표청구항▼
1. A viscous clutch comprising: a housing assembly;a rotor assembly including a disk;a reservoir to hold a supply of a shear fluid;a working chamber operatively positioned between the housing assembly and the rotor assembly, wherein selective introduction of the shear fluid to the working chamber fa
1. A viscous clutch comprising: a housing assembly;a rotor assembly including a disk;a reservoir to hold a supply of a shear fluid;a working chamber operatively positioned between the housing assembly and the rotor assembly, wherein selective introduction of the shear fluid to the working chamber facilitates selective torque transmission between the housing assembly and the rotor assembly;a fluid return bore that extends radially through at least a portion of the disk to the working chamber, the fluid return bore forming at least a portion of the fluid return path from the working chamber to the reservoir;a pump bore insert having a bore in fluid communication with a fluid return path extending from the working chamber to the reservoir, wherein the pump bore insert is positioned at least partially within the radially-extending fluid return bore; and an electromagnetically actuated valve assembly configured to controllably translate a first valve subassembly that controls flow of the shear fluid between the reservoir and the working chamber. 2. The viscous clutch of claim 1, wherein the pump bore insert is removably engaged with the rotor assembly. 3. The viscous clutch of claim 1 and further comprising: a reservoir cover defining a portion of a boundary of the reservoir; anda flow guide that traverses the reservoir cover to deliver the shear fluid from fluid return bore of the rotor assembly to the reservoir along the fluid return path. 4. The viscous clutch of claim 1 and further comprising: a second valve subassembly configured to be actuated concurrently with the first valve subassembly to further control flow of the shear fluid between the reservoir and the working chamber. 5. The viscous clutch of claim 1 and further comprising: an electromagnetic coil assembly positioned adjacent to the housing assembly, wherein the electromagnetic coil assembly includes first and second windings with separate terminals. 6. The viscous clutch of claim 1, wherein the rotor assembly further comprises: a bearing hub connected to the disk for co-rotation therewith, wherein the bearing hub extends beyond the housing assembly to provide a mounting location for an output member. 7. The viscous clutch of claim 1 and further comprising: a pulley connected to the housing assembly for co-rotation with the housing assembly. 8. The viscous clutch of claim 1 and further comprising: a rotationally fixed journal bracket having a shaft portion;a first set of tapered roller bearings for rotationally supporting the housing assembly on the shaft portion of the journal bracket; anda second set of tapered roller bearings for rotationally supporting the rotor assembly on the shaft portion of the journal bracket. 9. The viscous clutch of claim 1 and further comprising: an access opening in the housing assembly configured to allow access to the pump bore insert. 10. The viscous clutch of claim 9, wherein the housing assembly comprises: a base supported by bearings; anda cover attached to the base, wherein the access opening extends through a portion of the base. 11. The viscous clutch of claim 10, wherein the pump bore insert is removable through the access opening while the cover of the housing assembly is attached to the base. 12. The viscous clutch of claim 9 and further comprising: a plug removably engaged with the access opening. 13. A kit for use with the viscous clutch of claim 1, the kit comprising a replacement pump bore insert of a different configuration. 14. A viscous clutch comprising: a housing assembly;a rotor assembly;a reservoir to hold a supply of a shear fluid;a working chamber operatively positioned between the housing assembly and the rotor assembly, wherein selective introduction of the shear fluid to the working chamber facilitates selective torque transmission between the housing assembly and the rotor assembly;a pump bore insert having a bore in fluid communication with a fluid return path extending from the working chamber to the reservoir; anda wiper engaged at an outer diameter portion of the rotor assembly adjacent to the pump bore insert and extending radially outward from a surrounding surface of the rotor assembly. 15. The viscous clutch of claim 14, wherein the wiper has a generally rectangular perimeter and is curved. 16. A method for using a viscous clutch, the method comprising: engaging a first pump bore insert along a working chamber of the viscous clutch at a fluid return bore; andreplacing the first pump bore insert with a second pump bore insert of a different configuration, wherein the first and second pump bore inserts are each, respectively, positioned at least partially within a radially extending portion of the fluid return bore along a fluid return path. 17. The method of claim 16 and further comprising: inserting a tool through an access opening in a housing assembly of the viscous clutch; andengaging the tool with the first pump bore insert. 18. The method of claim 16 and further comprising: removing the first pump bore insert from the viscous clutch. 19. The method of claim 18, wherein the second pump bore insert provides different pumping characteristics to the viscous clutch than the removed first pump bore insert. 20. The method of claim 16 and further comprising: positioning a removable wiper to protrude radially into the working chamber, wherein the removable wiper is positioned adjacent to the pump bore insert. 21. A method for use with a viscous clutch, the method comprising: positioning a first pump bore insert along a working chamber of the viscous clutch and at least partially within a fluid return bore;removing the first pump bore insert from the viscous clutch; andpositioning a second pump bore insert along the working chamber of the viscous clutch and at least partially within the fluid return bore in place of the first pump bore insert. 22. The method of claim 21 and further comprising: positioning a removable wiper to protrude into the working chamber, wherein the removable wiper is positioned adjacent to the pump bore insert; andremoving the removable wiper from the viscous clutch. 23. The method of claim 21, wherein the second pump bore insert has a differently sized bore than the first pump bore insert. 24. The method of claim 21 and further comprising: metering shear fluid flow with the first or second pump bore insert. 25. The viscous clutch of claim 1 and further comprising: a fluid delivery path extending from the reservoir to the working chamber, wherein the fluid delivery path passes through the housing assembly, and wherein the fluid return path passes through the rotor assembly separate from the fluid delivery path. 26. The method of claim 21, wherein the step of positioning a second pump bore insert along the working chamber of the viscous clutch and at least partially within the fluid return bore in place of the first pump bore insert includes threading the second pump bore insert into a radially-extending portion of the fluid return bore. 27. The method of claim 21 and further comprising: establishing a fluid return path extending within the viscous clutch from the working chamber to a reservoir, wherein the fluid return path passes through a bore in the first pump bore insert. 28. The method of claim 27, wherein, after positioning the second pump bore insert along the working chamber, the fluid return path passes through a bore in the second pump bore insert. 29. A viscous clutch comprising: a housing assembly; a rotor assembly including a disk; a reservoir to hold a supply of a shear fluid; a working chamber operatively positioned between the housing assembly and the rotor assembly, wherein selective introduction of the shear fluid to the working chamber facilitates selective torque transmission between the housing assembly and the rotor assembly; a fluid return bore that extends radially through at least a portion of the disk to the working chamber, the fluid return bore forming at least a portion of the fluid return path from the working chamber to the reservoir; a pump bore insert having a bore in fluid communication with a fluid return path extending from the working chamber to the reservoir, wherein the pump bore insert is positioned at least partially within the radially-extending fluid return bore; and wherein the pump bore insert includes a threaded shank, a head adjoining the shank; and an engagement structure located on or along at least one of the shank and the head, wherein the bore extends through the shank and the head.
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이 특허에 인용된 특허 (58)
Kennedy Lawrence C. (Kettering OH) Lambert Harvey J. (West Milton OH), Anti-flowback check valve for a viscous fluid clutch.
Drennen David B. (Bellbrook OH) Huth Ronald G. (Huber Heights OH) Hudson David M. (Kettering OH), Fluid return channels for a cover of a viscous fluid clutch.
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