Isolating decoupler

Patent metadata

Field	Value
Publication number	US-2017122425-A1
Application number	US-201514930278-A
Country	US
Kind code	A1
Filing date	Nov 2, 2015
Priority date	Nov 2, 2015
Publication date	May 4, 2017
Grant date	—

Abstract

An isolating decoupler comprising a hub for connection to a shaft, a pulley journalled to the hub, the pulley having a belt engaging surface, a composite spring having a clutch portion, a transition portion and a variable diameter portion, the composite spring engaged between the hub and the pulley, the clutch portion diameter reducible in a loading direction for a frictional engagement with the pulley in the loading direction, the frictional engagement of the clutch portion progressively releasable from the pulley in an unloading direction, the variable diameter portion having a diameter which varies according to a torque load; and an inertial member engaged with the hub through a damping member.

First claim

We claim:

1 . An isolating decoupler comprising:
a hub ( 11 ) for connection to a shaft; a pulley ( 16 ) journalled to the hub, the pulley having a belt engaging surface; a composite spring ( 12 ) having a clutch portion ( 22 ), a transition portion ( 23 ) and a variable diameter portion ( 24 ); the composite spring engaged between the hub and the pulley, the clutch portion diameter reducible in a loading direction for a frictional engagement with the pulley in the loading direction; the frictional engagement of the clutch portion progressively releasable from the pulley in an unloading direction; the variable diameter portion having a diameter which varies according to a torque load; and an inertial member ( 74 ) engaged with the hub through a damping member ( 75 ).

2 . The isolating decoupler as in claim 1 , wherein the damping member comprises elastomeric material.

3 . The isolating decoupler as in claim 1 , wherein the pulley is journalled to the hub on a bushing.

4 . The isolating decoupler as in claim 1 , wherein the clutch portion is loaded in the winding direction.

5 . The isolating decoupler as in claim 1 , wherein the composite spring comprises a torsion spring.

6 . The isolating decoupler as in claim 1 , wherein the pulley comprises a multi-ribbed belt engaging surface.

7 . An isolating decoupler comprising:
a hub for connection to a driving shaft; a pulley journalled to the hub, the pulley having a belt engaging surface; a composite spring having a clutch portion, a transition portion and a variable diameter portion; the composite spring engaged between the hub and the pulley, the clutch portion radially reducible in a loading direction for a frictional engagement with the pulley in the loading direction; the frictional engagement of the clutch portion progressively releasable from the pulley in an unloading direction; the variable diameter portion having a diameter which varies according to a torque load; and an inertial member engaged with the hub through an elasromeric damping member

Assignees

• Gates Corp

Inventors

• Schneider Dean
• Serkh Alexander
• Langhorst Benjamin R

Classifications

• F16H55/36 Primary

  Pulleys (with features essential for adjustment F16H55/52) · CPC title

• F16H2055/366

  with means providing resilience or vibration damping · CPC title

• F16D2300/22

  Vibration damping · CPC title

• F16D41/206 Primary

  having axially adjacent coils, e.g. helical wrap-springs · CPC title

• F16D13/08 Primary

  with a helical band or equivalent member, which may be built up from linked parts, with more than one turn embracing a drum or the like, with or without an additional clutch actuating the end of the band (F16D13/02 takes precedence; {similar slip couplings F16D7/022; similar clutches electromagnetically actuated F16D27/025, F16D27/105} ; similar free-wheel clutches F16D41/20; similar brakes F16D49/02) · CPC title