Patent ID: 9605743
Date: 2017-03-28
CPC Classifications: F16D,F16H

Claim:
1. A decoupler with free wheel system and vibration dampening comprising: a pulley, a shaft actuated by the pulley, a hub having a first hub piece and a second hub piece, the hub being coupled between an inner race of the pulley and an outer surface of the shaft, at least one journal element between the shaft and the pulley, a clutch spring, a torsion spring, and a torsional spring housing cavity formed by an inner surface of said pulley and an outer surface of said hub, with one of the axial sides of the torsional spring housing cavity being limited by the second hub piece, wherein an axial length of the torsional spring housing cavity is smaller than an axial length of the relaxed, unconstrained torsional spring, wherein the first hub piece is mounted to the shaft and the second hub piece is mounted around the shaft and can rotate relative to the shaft, the torsion spring is arranged inside said torsional spring housing cavity and has a first end operatively coupled to the pulley and a second end operatively coupled to the second hub piece, and the clutch spring is arranged internally to the torsion spring and is frictionally coupled to both the hub pieces for transmission of torque to the shaft, wherein the torsion spring arranged inside the torsional spring housing cavity exerts an axial force (F a bearing ring coupled to the inner race of the pulley and a bushing mounted between the first hub piece and the bearing ring, the bearing ring having a stopper that engages the first end of the torsion spring, in case of a relative movement of the pulley and the torsion spring being arranged inside the torsional spring housing cavity which is limited in the axial direction by the bearing ring and by the second hub piece.