Electrically actuated rotating band torque transmitting mechanism for hybrid and other transmissions

摘要

A torque transmitting mechanism includes a drum attached to one of a first member and a second member, and a shell attached to another of the first member and the second member. The drum and the shell are concentrically disposed about a longitudinal axis, with the shell concentrically disposed about the drum. An electric motor includes a stator, and a first rotor rotatable about the longitudinal axis relative to the stator. A band is coupled to the shell, wrapped around the drum between four and twelve complete revolutions, and includes a first end attached to the first rotor for rotation with the first rotor. The band includes a second end attached to a reaction member. Rotation of the first rotor tightens the band against the drum to bias the drum against the shell, to transmit torque between the first member and the second member.

主权项

1. A transmission for a vehicle, the transmission comprising:
a housing; a first member and a second member, with each of the first member and the second member supported by the housing and aligned with each other along a longitudinal axis, wherein at least one of the first member and the second member is rotatable about the longitudinal axis relative to the housing; and a torque transmitting mechanism selectively interconnecting the first member and the second member for torque transmission therebetween, the torque transmitting mechanism including:
a drum attached to one of the first member and the second member and concentrically disposed about the longitudinal axis;a shell attached to another of the first member and the second member and concentrically disposed about the longitudinal axis and the drum, wherein the shell is radially spaced from the drum relative to the longitudinal axis;an electric motor including a stator fixed in position relative to the housing, and a rotor rotatable about the longitudinal axis relative to the stator; anda band having a first end and a second end, wherein the first end is coupled to either the shell and the rotor, or the drum and the rotor, wherein the second end is coupled to either the shell and the rotor, or the drum and the rotor, and wherein the band is wrapped to define at least one wrap completely encircling the drum;wherein rotation of the rotor in response to an electric current applied to the stator moves the at least one wrap of the band into frictional engagement with one of the drum or the shell to transmit torque between the first member and the second member.