Isolator decoupler
View Patent ↗An isolating decoupler comprising a pulley having a pulley inner surface, a hub having a radially extending arm, the radially extending arm having a frictional surface slidingly engaged with the pulley inner surface, a spring fixed to the pulley, the spring intermittently engageable with the radially extending arm, an elastomeric member disposed between the spring and the radially extending arm; and the radially extending arm intermittently engageable with a pulley stop.
1. An isolating decoupler comprising:
a pulley ( 30 ) having a pulley inner surface ( 300 );
a hub ( 20 ) having a radially extending arm ( 21 );
the radially extending arm having a frictional surface ( 211 ) slidingly engaged with the pulley inner surface;
a spring ( 41 ) fixed to the pulley;
the spring intermittently engageable with the radially extending arm;
an elastomeric member ( 61 ) disposed between the spring and the radially extending arm; and
the radially extending arm intermittently engageable with a pulley stop ( 301 ).
2. The isolating decoupler as in claim 1 further comprising three radially extending arms, each radially extending arm comprising a frictional surface slidingly engaged with the pulley inner surface.
3. The isolating decoupler as in claim 2 further comprising three springs, each spring engaged with a radially extending arm.
4. The isolating decoupler as in claim 3 further comprising a damping member disposed between each radially extending arm and each spring.
5. The isolating decoupler as in claim 3 further comprising a damping member disposed between each radially extending arm and the pulley.
6. The isolating decoupler as in claim 1 , wherein the spring comprises a cantilever bending portion and a folded portion.
7. The isolating decoupler as in claim 1 further comprising a friction ring disposed between the pulley and the hub.
8. The isolating decoupler as in claim 1 , wherein the pulley inner surface comprises a cylindrical section.
9. The isolating decoupler as in claim 8 , wherein the frictional surface is arcuate.
10. An isolating decoupler comprising:
a pulley ( 30 ) having a pulley inner surface ( 300 ) describing a cylindrical section;
a hub ( 20 ) having three radially extending arms ( 21 , 22 , 23 );
each radially extending arm having an arcuate frictional surface ( 211 , 221 , 231 ) slidingly engaged with the pulley inner surface;
three springs ( 41 , 42 , 43 ) fixed to the pulley;
one of each spring intermittently engageable with one of each radially extending arms;
an elastomeric member ( 61 , 62 , 63 ) is disposed between each spring and each radially extending arm; and
each radially extending arm intermittently engageable with a pulley stop ( 301 , 302 , 303 ).
11. The isolating decoupler as in claim 10 further comprising a friction ring member disposed between the hub and the pulley.
12. The isolating decoupler as in claim 10 further comprising a shaft attached to the hub.