Decoupler with spring travel limiter

摘要

A decoupler having an output member, a one-way clutch, a spring and a spring limiter. The spring is disposed between an output portion of the one-way clutch and the output member to bias the output portion in a predetermined rotational direction relative to the output member. The spring limiter can be configured to lock an output of the one-way clutch to the output member to transmit rotary power between the one-way clutch and the output member without stressing the spring beyond a predetermined point and/or to limit rotational movement of the output portion and an associated end of the spring relative to the output member in the predetermined rotational direction. A method for operating a decoupler is also provided.

主权项

1. A decoupler comprising:
a hub that is rotatable about an axis; a pulley disposed concentrically about the hub and rotatable about the axis; a one-way clutch having an input member and an output member, the one-way clutch permitting transmission of rotary power from the pulley to the output member, but not from the output member to the pulley; and a torsion spring disposed between the output member of the one-way clutch and the hub to transmit rotary power from the output member to the hub; wherein the output member of the one-way clutch is rotatable relative to the hub about the axis between a first position and a second position, wherein positioning of the output member in a first position locks the output member to the hub so that rotary power transmitted through the torsion spring is limited to a predetermined maximum torque, and wherein all rotary power transmitted through the one-way clutch is transmitted to the hub through the torsion spring when the output member is positioned between the first and second positions.