Patent ID: 9140319
Filing Date: 2015-09-22
Classification: F16D,F16H

Abstract:
1. A decoupler, comprising: a hub; a pulley mounted about the hub; a helical coil torsion spring disposed about the hub; a first spring driver fixed to the pulley, the first spring driver having a first stop feature to transfer force to the spring; a second spring driver mounted about the hub and not fixed to the pulley, the second spring driver having a second stop feature to receive force from the spring; a driving clutch member mounted about the hub, the driving clutch member being connected to the second spring driver; a driven clutch member positioned axially adjacent the driving clutch member and mounted concentrically about the hub with the driving clutch member, the driven clutch member being drivingly connected to the hub; a one-way wrap spring clutch mounted about the hub and disposed to interconnect the driving clutch member and the driven clutch member, the one-way wrap spring clutch being configured to transfer torque in a first flow path direction between the driving clutch member and the driven clutch member, and configured to inhibit torque flow in a second direction that is opposite the first direction between the driven clutch member and driving clutch member; and an axial biasing member acting between one of (i) the pulley and the driving clutch member and (ii) the hub and driven clutch member, so as to urge the driving and driven clutch members together.