Vehicle propulsion system torque transfer vibration attenuation mechanism
AssigneeGM Global Technology Operations LLC
InventorsDerek F Lahr, Farzad Samie
Life of this patent
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Abstract
A torque transfer mechanism includes an input member to receive an input torque from a propulsion source and an output member coupled to the input member to transfer the input torque to a driveline component. The torque transfer mechanism also includes a damping mechanism having at least one spring element to restrict relative rotation between the input member and the output member. wherein the at least one spring element defines a first spring rate corresponding to an initial range of travel that is less than a second spring rate corresponding to a subsequent range of travel.
Claims15
A torque transfer mechanism for transmitting torque from a torque output member of a propulsion source to a transmission input member of a transmission assembly, the propulsion source including an engine and/or a motor, the torque transfer mechanism comprising:
- an input member configured to attach to the torque output member and receive an input torque from the propulsion source;
- an output member coupled to the input member and configured to attach to the transmission input member and transfer the input torque to the transmission assembly;
- and
- a damping mechanism including a clockspring attached at a first end thereof to the input member and at a second end thereof to the output member, the first end being axially spaced from the second end relative to an axis of rotation of the clockspring, the clockspring including:
- a first portion proximate the first end and having a first thickness with a first spring rate corresponding to a first range of rotational travel of the clockspring, and
- a second portion proximate the second end and having a second thickness with a second spring rate, greater than the first spring rate, corresponding to a second range of rotational travel of the clockspring.
A torque transfer mechanism for transmitting torque from a torque output member of a propulsion source to a transmission input member of a transmission assembly, the torque transfer mechanism comprising:
- an input member configured to attach to the torque output member and receive an input torque from the propulsion source;
- an output member coupled to the input member and configured to attach to the transmission input member and transfer the input torque to the transmission assembly;
- and
- a first clockspring and a second clockspring each attached at a first end thereof to the input member and at a second end thereof to the output member, the first ends being axially spaced from the second ends relative to an axis of rotation of the clockspring, the first and second clocksprings being configured to cooperate to resist relative rotation between the input member and the output member, wherein the first and second clocksprings are interleaved with each other such that coil lengths of the clocksprings contact each other to restrict further deformation of a first portion of the coil lengths after a predetermined initial rotation travel.
Dependencies are inferred from the claim text.