Lubrication control device
View Patent ↗An automatic transmission is comprised of a housing and a hub rotatable about a shaft at differing speeds and having an axial assembly gap therebetween. The axial assembly gap defines an annular flow path in fluid communication with a source lubrication path and a lubrication-requiring mechanism. A lubrication control device is disposed in the annular flow path. The device includes a washer in constant contact with the housing and having a radial slot to permit a prescribed flow of lubricant through the annular flow path to the lubrication-requiring mechanism. The device further includes a belleville spring wherein a small diameter end is in contact with the hub and a large diameter end is piloted by a seating on the washer, wherein the belleville spring provides spring adjustability to accommodate the variable axial assembly gap.
1. An automatic transmission, comprising:
a source lubrication path for lubricant, a housing and a hub rotatable about a shaft at differing speeds and having a variable axial assembly gap therebetween, said axial assembly gap defining an annular flow path in fluid communication with said source lubrication path and a lubrication-requiring mechanism, said housing having an axial flange wall protruding in said annular flow path, a lubrication control device disposed in said annular flow path and in constant contact with said housing and said hub and having spring adjustability to accommodate said variable axial assembly gap, a means for securing said lubrication control device to said axial flange wall of said housing for rotation therewith, and said lubrication control device having a radial slot to permit a prescribed flow of lubricant between said lubrication control device and said hub, through said annular flow path, to said lubrication-requiring mechanism.
2. A transmission, as defined in claim 1 , wherein said lubrication control device comprises a washer configured as an annular cup and having an annular disk portion defined by a lubrication side and a securing side and a cylinder portion extending axially from an outer circumference of said securing side, said lubrication side in constant contact with said hub and including said radial slot, said cylinder portion defined by inner and outer cylindrical walls, said outer cylindrical wall including an inward shoulder, said lubrication control device further comprises a belleville spring having a small diameter end piloted and seated on said inward shoulder of said cylinder portion of said washer and a large diameter end contacting said housing, wherein said belleville spring provides spring adjustability to accommodate said variable axial assembly gap, and said means for securing said lubrication control device to said housing for rotation therewith comprising a key slot in said axial flange wall of said housing and a key along said inner cylindrical wall of said washer extending in said key slot.
3. A transmission, as defined in claim 2 , wherein said belleville spring is comprised of bronze.