Transmission and control

Abstract

Abstract A TRANSMISSION INCLUDING A COMPOUND PLANETARY GEAR SET HAVING AN INPUT SUN GEAR, A REACTION SUN GEAR, A RING GEAR AND A PLURALITY OF INDIVIDUAL PINIONS MOUNTED IN A COMMON OUTPUT CARRIER. THE PINION ARRANGEMENT CONSISTS OF SETS OF THREE (3) LIKE INDIVIDUAL PINION GEARS MOUNTED FOR INDEPENDENT ROTATION ON THE COMMON CARRIER ONE OF WHICH MESHES WITH THE INPUT SUN GEAR, A SECOND OF WHICH MESHES WITH THE FIRST PINION AND THE RING GEAR, AND THE GHIRD OF WHICH MESHES WITH THE RING GEAR AND THE REACTION SUN GEAR. IN ONE FORM, THE CARRIER INCLUDES A CENTRAL PLATE OR HUB MEMBER WHICH SERVES TO SUPPORT A COMMON PINION SHAFT OR PIN BETWEEN AN ALIGNED PAIR OF PINIONS, THE SPLIT PINIONS AND THE CENTRAL SUPPORT MAKING POSSIBLE THE USE OF A SMALL DIAMETER PIN AND HENCE, A SMALL DIAMETER PLANETARY GEAR PACKAGE. A SECOND PINION ARRANGEMENT MAY CONSIST OF THREE (3) SET OF LIKE PINIONS, THE FIRST OF WHICH MESHES WITH THE INPUT SUN GEAR, THE SECOND OF WHICH IS MOUNTED ON ITS OWN PINION SHAFT, SUPPORTED BY THE CENTRAL HUB, AND MESHES WITH THE FIRST PINION AND THE RING GEAR, WHILE THE THIRD PINION IS MOUNTED ON ITS OWN SHAFT AND SUPPORTED BY THE CARRIER CENTRAL HUB RADIALLY INWARDLY FROM THE SECOND PINION,D WHILE MESHING WITH THE REACTION SUN GEAR AND WITH A RADIALLY INWARDLY LOCATED PORTION OF A STEPPED OR TWO-DIAMETER RING GEAR. THE RESULTANT STEPPED SPLIT PINION ARRANGEMENT PRODUCES HIGHER LOW AND REVERSE GEAR RATIOS, AS WELL AS A MORE FABORABLE RELATIONSHIP BETWEEN THE TWO. FOR BOTH PINION ARRANGEMENTS, LOW GEAR RATIO IS PROVIDED BY A ONE-WAY CLUTCH IN AUTOMATIC LOW GEAR, WHILE THE REACTION SUN GEAR IS HELD. INPUT DURING SECOND GEAR RATIO IS PROVIDED BY AN ADDITIONAL CLUTCH CONNECTING THE RING GEAR TO THE INPUT SHAFT, WHILE REACTION IS PROVIDED BY THE REACTION SUN GEAR. IN ONE FORM, FOR THIRD GEAR RATIO, THE REACTION SUN GEAR IS RELEASED, AND BOTH CLUTCHES DRIVE. IN ANOTHER FORM, A THIRD GEAR CLUTCH, HAVING PARTS IDENTICAL TO THE SECOND GEAR CLUTCH, IS ENGAGED, LOCKING UP THE PLANETARY GEAR SET TO PRODUCE A DIRECT DIRVE AND PREVENT THE SECOND GEAR CLUTCH FROM BEING SUBJECTED TO EXCESSIVE TURBIN TORQUE. FOR REVERSE, A REVERSE BRAKE IS ENGAGED, CAUSING THE RING GEAR TO SERVE AS THE REACTION MEMBER, WHILE THE DIRECT CLUTCH IS ENGAGED. THE ENGAGEMENT OF THE DIRECT CLUTCH IN REVERSE SUPPLEMENTS THE INPUT THE GEAR SET THROUGH THE ONE-WAY CLUTCH PREVENTES FREEWHEELING IN REVERSE GEAR.

Inventors

• 👤 Gilbert K Hause

Bibliographic Details