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US 10,539,210 B2Granted
Angular contact ball ramps for driven turbocharger
AssigneeSuperTurbo Technologies, Inc.
InventorsMarc Montgomery, Ryan Sherill
Life of this patent
Estimating the term…
Abstract
Disclosed is a planetary traction drive for a driven turbocharger that utilizes angular contact ball ramps to provide variable clamping depending on torque throughput. The ball ramps are located between ring rollers and a ring gear, and function to locate the ring gear concentrically to the ring rollers. The angled contact axes of the ball ramps allows use of a low conformity contact between the balls and ball races in the ball ramps to provide efficient movement, while simultaneously locating ring gear concentrically to the traction rings.
Claims13
A driven turbocharger for an engine comprising:
- a turbo shaft;
- a compressor connected to a first location on said turbo shaft;
- a turbine connected to a second location on said turbo shaft;
- a planetary traction drive that interfaces with said turbo shaft to transmit power to and from said turbo shaft, said planetary traction drive comprising:
- a plurality of planet rollers that interface with said turbo shaft;
- a first ring roller and a second ring roller that interface with slanted traction surfaces on said plurality of planet rollers;
- a ring gear positioned centrally that interfaces with said first ring roller and said second ring roller through a first angular contact ball ramp and a second angular contact ball ramp, such that a plurality of balls in said first angular contact ball ramp and said second angular contact ball ramp increase clamping forces in said planetary traction drive when torque through said ring gear increases, where;
- said first angular contact ball ramp and said second angular contact ball ramp are comprised of said plurality of balls in ball races with angled contact axes that are angled with directional components in both the axial and radial directions that constrain said ring gear concentrically to said first ring roller and said second ring roller;
- a transfer gear that meshes with said ring gear that transfers power to and from said engine through a transmission.
6 more elements
A method of providing clamping forces in a planetary traction drive comprising:
- providing a sun shaft;
- interfacing a plurality of planet rollers to said sun shaft;
- interfacing a first ring roller and a second ring roller to said plurality of planet rollers through slanted traction surfaces on said plurality of planet rollers;
- providing a ring gear centrally located between said first ring roller and said second ring roller;
- coupling said ring gear to said first ring roller through a first angular contact ball ramp, and to said second ring roller through a second angular contact ball ramp such that a plurality of balls in said first angular contact ball ramp and said second angular contact ball ramp increase clamping forces in said planetary traction drive when torque through said ring gear increases, where;
- said first angular contact hall ramp and said second angular contact ball ramp are comprised of said plurality of halls in ball races with angled contact axes that are angled with directional components in both the axial and radial directions that constrain said ring gear concentrically to said first ring roller and said second ring roller.
3 more elements
A planetary traction drive comprising:
- a sun shaft;
- a plurality of planet rollers that interface with said sun shaft;
- a first ring roller and a second ring roller that interface with slanted traction surfaces on said plurality of planet rollers;
- a ring gear positioned centrally that interfaces with said first ring roller and said second ring roller through a plurality of balls in a first angular contact ball ramp and a second angular contact ball ramp, such that said plurality of balls in said first angular contact ball ramp and said second angular contact ball ramp increase clamping forces in said planetary traction drive when torque through said ring gear increases, where;
- said first angular contact ball ramp and said second angular contact ball ramp are comprised of said plurality of halls in ball races with angled contact axes that are angled with directional components in both the axial and radial directions that constrain said ring gear concentrically to said first ring roller and said second ring roller.
2 more elements
Dependencies are inferred from the claim text.