Traction drive power transmission systems
OwnerLori H. Hambricinventor
Life of this patent
Estimating the term…
Abstract
Traction drive transmissions which may be utilized as speed increasers or speed reducers for various power and rotary motor applications including for use in transmissions for helicopter main rotor and tail rotor drives wherein power from the primary input source is transmitted to output shafts or driven elements which may be disposed at a variety of angular relationships with respect to the input source through multiple rollers which are shaped and in frictionally driven contact with one another so as to effectively divide the input load into multiple power paths to the output shafts or driven elements and wherein the rollers are oriented so as to reduce or eliminate the radial loading of stresses on the bearings in which the rollers are mounted.
Claims13
A traction drive power transmission system for drivingly engaging an input drive shaft having a longitudinal axis and extending from a rotary source of power supply to a rotatable working member mounted to a driven shaft through a split power path comprising, a power input drive roller means mounted to the input drive shaft so as to be rotatably driven about the longitudinal axis of the input drive shaft, a power splitting reactor roller means mounted adjacent said input drive roller means, each of said input drive roller means and said reactor roller means having outer surfaces in engagement with one another, a pair of spaced opposing flange members mounted to the driven shaft and having generally opposing annular contact surfaces, said contact surface of one of said flange members being engageable with said outer surface of said input drive roller means and said contact surface of the other of said flange members being engageable with the outer surface of said reactor roller means, at least one secondary power splitting reactor roller means having an outer surface, said secondary reactor roller means rotatably engaging said outer surface of said input roller means and said contact surface of said other of said flange members mounted to the driven shaft, whereby power from the input shaft is directed to the rotatably working member through said input roller means, said reactor roller means and said at least one secondary reactor roller means.
A traction drive power transmission system for drivingly engaging an input drive shaft having a longitudinal axis and extending from a rotary source of power supply to a rotatably working member mounted to a driven shaft through a split power path comprising, a power input drive roller means mounted to the input drive shaft so as to be rotatably driven about the longitudinal axis of the input drive shaft, a power splitting reactor roller means mounted adjacent said input drive roller means, each of said input drive roller means and said reactor roller means having outer surfaces in engagement with one another, a pair of spaced opposing flange members mounted to the driven shaft and having generally opposing annular contact surfaces, said contact surface of one of said flange members being engageable with said outer surface of said input drive roller means and said contact surface of the other of said flange members being engageable with the outer surface of said reactor roller means, a first pair of spaced bearing means for supporting said input drive roller means and a second pair of spaced bearing means for supporting said reactor roller means, said input drive roller means having a first shaft disposed between said firs pair of spaced bearings, said first shaft having a central axis which extends through a point along an elongated axis of the driven shaft, and said reactor roller means having a second shaft mounted between said second pair of spaced bearings and having a central axis which intersects the axis of said driven shaft a said point, whereby power from the input shaft is directed to the rotatably working member through both said input drive roller means and said reactor roller means.
A traction drive power transmission system for drivingly engaging an input drive shaft having a longitudinal axis and extending from a rotary source of power supply to a rotatably working member mounted to a driven shaft through a split power path comprising, a power input drive roller means mounted to the input drive shaft so as to be rotatably driven about the longitudinal axis of the input drive shaft, a power splitting reactor roller means mounted adjacent said input drive roller means, each of said input drive roller means and said reactor roller means having outer surfaces in engagement with one another, a pair of spaced opposing flange members mounted to the driven shaft and having generally opposing annular contact surfaces, said contact surface of one of said flange members being engageable with said outer surface of said input drive roller means and said contact surface of the other of said flange members being engageable with the outer surface of said reactor roller means, a first pair of spaced bearing means for supporting said input drive roller means and a second pair of spaced bearing means for supporting said reactor roller means, said input drive roller means being mounted on a first shaft which extends between said first spaced bearing means, said first shaft having a central axis which intersects an elongated axis of the driven shaft at a first point, said reactor roller means mounted on a second shaft which extends between said second spaced bearings and having a central axis which intersects the elongated axis of the driven shaft at a second point spaced from said first point and secondary power transmission means extending from said reactor roller means away from said driven shaft whereby power from the input shaft is directed to the rotatable working member through said input roller means and said reactor roller means provides power to both the rotatable working member and to a supplemental spaced working member.
Dependencies are inferred from the claim text.