Decoupler carrier with balanced forces

摘要

In one aspect, a decoupler comprises an input member, an output member, and a torsional isolation spring, a carrier, and a wrap spring clutch configured to operate in a first mode in which rotary power is transmitted in a first rotational direction from the input member to the output member serially through the wrap spring clutch, the carrier, and the isolation spring, and a second mode in which the output member overruns the input member in the first rotational direction. The carrier has a carrier clutch drive face that receives a first vector force from an end of the wrap spring clutch, and an isolation spring drive face that receives a second vector force from an end of the isolation spring. The wrap spring clutch and isolation spring drive faces are arranged so as to direct the second vector force to intersect with the first vector force substantially at the carrier clutch drive face.

主权项

1. A decoupler, comprising:
an input member (30, 402); an output member (32, 404); and a torsional isolation spring (40, 410), a carrier (82, 408), and a wrap spring clutch (80, 406) configured to operate in a first mode in which rotary power is transmitted in a first rotational direction from the input member to the output member serially through the wrap spring clutch, the carrier, and the isolation spring, and a second mode in which the output member overruns the input member in the first rotational direction, wherein the carrier has a carrier clutch drive face (108, 436) that receives a first vector force (V1) from a face (96, 434) at a helical end (86, 432) of the wrap spring clutch, and an isolation spring drive face (118, 438) that receives a second vector force (V2) from a face (132, 440) at a helical end of the isolation spring, wherein the carrier clutch drive face and the isolation spring drive face are arranged so as to direct the second vector force to intersect with the first vector force substantially at the carrier clutch drive face, wherein the helical end of the wrap spring clutch extends along a helical path that substantially matches a helical path of a coil of the wrap spring clutch immediately adjacent the helical end, and, wherein the helical end is a terminal end of the wrap spring clutch.