COVER HUB WITH SEALING RING
A cover hub for a torque converter includes a radial wall arranged for axial alignment with a cover of the torque converter, a first circumferential surface including an opening for receiving a seal, and a second circumferential surface disposed radially inside of the first circumferential surface and arranged for sealing to a transmission input shaft. The hub has a first fluid passage exiting the hub at a first axial side of the opening and a second fluid passage, circumferentially offset from the first fluid passage and exiting the hub on a second axial side of the opening, opposite the first axial side, and a first circumferential protrusion for sealing the hub to the cover.
1 . A cover hub for a torque converter comprising:
a radial wall arranged for axial alignment with a cover of the torque converter;
a first circumferential surface including an opening for receiving a seal;
a second circumferential surface disposed radially inside of the first circumferential surface and arranged for sealing to a transmission input shaft;
a first fluid passage exiting the hub at a first axial side of the opening;
a second fluid passage, circumferentially offset from the first fluid passage and exiting the hub on a second axial side of the opening, opposite the first axial side; and,
a first circumferential protrusion for sealing the hub to the cover.
2 . The cover hub of claim 1 wherein at least a portion of the first fluid passage intersects the radial wall or the second circumferential surface.
3 . The cover hub of claim 1 wherein at least a portion of the first or second fluid passage intersects the first circumferential surface.
4 . The cover hub of claim 1 wherein the hub includes a second circumferential protrusion, extending in a direction axially opposite of the first protrusion, for engaging a clutch seal plate.
5 . A cover assembly for a torque converter comprising:
a cover including a first radial wall with a circumferential recess; and,
a cover hub including:
a second radial wall with a first circumferential protrusion extending axially into the recess;
a first circumferential surface arranged for sealing to a piston plate for the torque converter;
a second circumferential surface disposed radially inside of the first circumferential surface and arranged for sealing to a transmission input shaft; and,
first and second fluid passages exiting the hub at the first circumferential surface.
6 . The cover assembly of claim 5 wherein:
the first circumferential surface includes an opening for receiving a seal;
at least a portion of the first fluid passage extends from the radial wall or the second circumferential surface and exits the hub at a first axial side of the opening; and,
at least a portion of the second fluid passage exits the hub on a second axial side of the opening, opposite the first axial side.
7 . The cover assembly of claim 5 wherein the hub is fixed to the cover by a discontinuous weld.
8 . The cover assembly of claim 5 further comprising:
a piston plate with a third circumferential surface; and,
a seal disposed in the opening for sealing the third circumferential surface to the hub.
9 . The cover assembly of claim 8 further comprising:
a seal plate, wherein the hub includes a second circumferential protrusion, extending in an axially opposite direction from the first protrusion and fixed to the seal plate.
10 . A torque converter comprising:
a cover assembly including a cover shell with a first continuous recess and a cover hub, fixed to the shell by a discontinuous weld and including a second continuous recess engaged with the first recess to seal the hub to the cover shell;
a piston plate sealed to the cover hub; and,
a seal plate fixed to the hub.
11 . The torque converter of claim 10 wherein the hub further comprises:
a circumferential surface arranged for sealing to a transmission input shaft;
a first passage extending from a first axial side of the circumferential surface, through the hub, to a chamber at least partially formed by the cover shell and the piston plate; and,
a second passage extending from a second axial side of the circumferential surface, opposite the first axial side, through the hub, to a chamber at least partially formed by the piston plate and the seal plate.