Isolating decoupler
AssigneeThe Gates Corporation
InventorsAlexander Serkh, Essie Rahdar
Life of this patent
Estimating the term…
Abstract
An isolating decoupler comprising a hub, a pulley journalled to the hub, a torsion spring having a first torsion spring end welded directly to the hub, a wrap spring having a first wrap spring end welded directly to a second torsion spring end, a wrap spring outer surface fictionally engaged with a pulley inner surface, and a wrap spring second end temporarily engagable with the torsion spring first end whereby the frictional engagement between the wrap spring outer surface and the pulley inner surface is progressively released as a torque load increases.
Claims19
An isolating decoupler comprising:
- a hub;
- a pulley journalled to the hub;
- a torsion spring directly connected to the hub by a laser weld;
- a wrap spring directly connected to the torsion spring by a weld;
- and
- the wrap spring frictionally engaged with a pulley surface.
An isolating decoupler comprising:
- a hub;
- a pulley journalled to the hub;
- a torsion spring having a first end directly connected to the hub by a laser weld;
- a wrap spring directly connected to a torsion spring second end by a laser weld;
- the wrap spring radially expandable to frictionally engage a pulley surface to transmit a torque load;
- and
- a wrap spring end releasably engagable with the torsion spring whereby upon engagement with the torsion spring the frictional engagement between the wrap spring and the pulley surface is progressively released as a torque load increases.
A method of manufacturing an isolating decoupler comprising:
- journaling a pulley to a hub;
- welding a torsion spring first end directly to the hub with a weld bead;
- selectively adjusting the weld bead length to achieve a desired torsion spring characteristic;
- welding a wrap spring end directly to a torsion spring second end;
- and
- engaging the wrap spring frictionally with a pulley surface.
Dependencies are inferred from the claim text.