US 11,753,987 B2
Spring preload for traction drive
Marc Montgomery, Loveland, CO (US); Jared Howe, Loveland, CO (US); and Ryan Sherrill, Loveland, CO (US)
Assigned to SuperTurbo Technologies, Inc., Loveland, CO (US)
Filed by SuperTurbo Technologies, Inc., Loveland, CO (US)
Filed on Feb. 18, 2022, as Appl. No. 17/675,772.
Claims priority of provisional application 63/214,630, filed on Jun. 24, 2021.
Claims priority of provisional application 63/164,812, filed on Mar. 23, 2021.
Prior Publication US 2022/0307411 A1, Sep. 29, 2022
Int. Cl. F02B 39/04 (2006.01); F02B 37/10 (2006.01); F16H 13/14 (2006.01); F16H 13/08 (2006.01)
CPC F02B 39/04 (2013.01) [F02B 37/105 (2013.01); F16H 13/14 (2013.01); F16H 13/08 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A planetary traction drive comprising:
a sun shaft;
a plurality of planet rollers with outer roller traction surfaces that interface with said sun shaft;
a ring roller assembly comprising:
a ring gear;
a sprung traction ring and a second traction ring located concentrically with said ring gear that interface with slanted inner roller traction surfaces of said plurality of planet rollers;
a preload spring located between said ring gear and said sprung traction ring that provides a preload force on said slanted inner roller traction surfaces of said plurality of planet rollers during assembly and operation of said planetary traction drive;
an anti-rotation mechanism that connects said sprung traction ring and said ring gear such that said sprung traction ring can slide axially on said anti-rotation mechanism wherein said anti-rotation mechanism transmits torque between said sprung traction ring and said ring gear.