Traction roller transmission
AssigneeExcelermatic Inc.
InventorCharles E. Kraus
Life of this patent
Estimating the term…
Abstract
A traction roller transmission having a number of traction rollers disposed in an annular space formed between a sun roller rotatable with one shaft and traction rings surrounding the sun roller. The traction rollers are rotatably supported and mounted for movement with another shaft and the traction rings are slightly conical and held in position by cam structures such that a torque transmitted through the transmission forces the conical traction rings toward each other so as to cause firm engagement of the traction rollers with the traction rings and the sun roller. Springs are disposed between the traction rings to provide for return of the traction rings when the torque transmitted through the transmission is reduced.
Claims6
In a traction roller transmission comprising:
- a traction ring structure including two traction rings having opposite conical inner traction surfaces;
- a sun roller centrally disposed within the traction ring structure and having a circumferential traction surface spaced from the traction surfaces of said traction rings;
- planetary traction rollers supported in the space between the sun roller and the traction ring structure, each of said traction rollers having a cylindrical central section in engagement with said sun roller and axially outer conical sections in engagement with the conical traction rings, and engagement means for forcing said traction rings toward each other and into firm compressive engagement with the traction rollers and said traction rollers into frictional engagement with said sun roller;
- the improvement residing in the cone angle of said conical traction ring surfaces and the conical surface sections of the traction rollers being relatively small so as to prevent substantial spin at the conical surfaces of the traction rollers and the traction rings and separating means being disposed between the traction rings for axially forcing said traction rings apart for disengagement of said traction rings from said traction rollers.
Dependencies are inferred from the claim text.