Automatic transmission carrier assembly including an overrunning brake
AssigneeFord Global Technologies, LLC
InventorsJohn W. Kimes, Bernie J. Simon
Life of this patent
Estimating the term…
Abstract
A carrier assembly for a planetary gearset of a transmission includes a pinion carrier, a one-way brake having a rocker ring integral with the carrier and having multiple pockets mutually spaced about an axis and located on an outer radial surface of the carrier. A cam ring includes multiple notches angularly spaced about the axis and facing the rocker ring. A rocker, located in each pocket, pivots about a pivot center to engage the cam ring, and a spring urges each rocker to pivot toward engagement with the cam ring. A hydraulically actuated friction brake secured to the carrier alternately holds the carrier against rotation relative to a housing and permits the carrier to rotate.
Claims18
A carrier assembly for a planetary gearset of a transmission comprising:
- a pinion carrier including a rocker ring formed with pockets mutually spaced about an axis of rotation and located on an outer radial surface of the carrier;
- a cam ring including notches angularly spaced about the axis and facing the rocker ring and pockets;
- multiple rockers, each rocker being located in a respective pocket for pivoting movement about a pivot center toward engagement with the cam ring, each rocker including first and second exterior partial cylindrical surfaces centered at the pivot center, said first surface being spaced a first radial distance from the pivot center, said second surface being spaced a second radial distance from the pivot center, the first and second distances being unequal;
- and
- multiple springs, each spring urging a rocker to pivot toward engagement with the cam ring.
A carrier assembly for a planetary gearset of a transmission comprising:
- a pinion carrier including a rocker ring formed with pockets mutually spaced about an axis of rotation and located on an outer radial surface of the carrier;
- a cam ring including notches angularly spaced about the axis and facing the rocker ring and pockets, the cam ring including splines formed on a radial outer surface for engaging a nonrotating housing and holding the cam ring fixed on the housing against rotation relative to the pinion carrier;
- multiple rockers, each rocker being located in a respective pocket for pivoting movement about a pivot center toward engagement with the cam ring, each rocker including first and second exterior partial cylindrical surfaces centered at the pivot center, said first surface being spaced a first radial distance from the pivot center, said second surface being spaced a second radial distance from the pivot center the first and second distances being mutually unequal;
- multiple springs, each spring urging a rocker to pivot toward engagement with the cam ring;
- pinion support shafts angularly spaced about the axis and supported on the carrier;
- and
- a planet pinion rotatably supported on each pinion support shaft.
Dependencies are inferred from the claim text.