Gap-filling clutch with ramps

摘要

A transmission clutch including: a carrier; a clutch pack; friction plates; a compression plate including a portion; and a first ramp ring including: a first portion in contact with the portion of the compression plate; and a second portion. The clutch includes a second ramp ring including a third portion axially aligned with the second portion; a lever spring; and a piston. The piston displaces the spring in an axial direction such that: the spring applies a force to the second portion; the first ramp ring rotates in a circumferential direction and axially displaces in the axial direction; and the first ramp ring urges the compression plate in the axial direction to contact the clutch pack. The piston displaces the lever spring further in the axial direction such that the compression plate clamps pressure plates and friction plates in the clutch pack to rotationally fix the carrier to the housing.

主权项

1. A clutch for a transmission, comprising:
an inner carrier; a clutch pack including:
plurality of pressure plates non-rotationally connected to one of the inner carrier or a housing for the transmission; and,a plurality of friction plates non-rotationally connected to the other of the inner carrier or the housing; a compression plate including a first portion; a first ramp ring including second and third portions; a second ramp ring including a fourth portion; a first ramp assembly including:
the first portion of the compression plate including a first plurality of ramps; and,the second portion of the first ramp ring including a second plurality of ramps in contact with the first plurality of ramps; a second ramp assembly; a lever spring; and, an axially displaceable piston,
wherein:
the piston is arranged to axially displace the lever spring a first distance in a first axial direction such that:
the lever spring applies a first force to the third portion in the first axial direction;the first ramp ring rotates in a first circumferential direction and axially displaces in the first axial direction; and,the first ramp ring displaces the compression plate in the first axial direction to contact a portion of the clutch pack; and,the piston is arranged to further displace the lever spring in the first axial direction such that the compression plate displaces further in the first axial direction and the plurality of pressure plates frictionally engages the plurality of friction plates to rotationally fix the inner carrier with respect to the housing; and,wherein the second ramp assembly includes:
the third portion of the first ramp ring including a third plurality of ramps; and,the fourth portion of the second ramp ring including a fourth plurality of ramps in contact with the third plurality of ramps; or,wherein the second ramp assembly includes:
the third portion of the first ramp ring including a third plurality of ramps or a first radial surface;the fourth portion of the second ramp ring including a fourth plurality of ramps or a second radial surface; and,a plurality of spheres or rollers axially disposed between the third and fourth portions and in contact with the third and fourth portions.