Anti-backlash gearing
AssigneeUSM Corporation
InventorArchie N. Swasey
Life of this patent
Estimating the term…
Abstract
A gear system adapted to eliminate backlash between a set of reversible gears. The gears are also arranged to perform without backlash when their center distances are changed. One gear of the double helical type fixed to a first shaft is in engagement with a single adjustably secured first helical gear on a second shaft. A biased helical gear is slidably arranged on the second shaft adjacent the first helical gear, forcing the teeth of the biased gear against corresponding teeth of the double helical gear, automatically removing any clearance between them thus eliminating any backlash therewith, which is desirable for gears driving matched rolls.
Claims5
A gear drive mechanism for driving two shafts in synchronized rotation comprising:
- a unitary double gear having teeth of opposite helixes and being fixed on one of said shafts;
- two pinions slidable axially on the other of said shafts and fixed thereon against rotation;
- one of said pinions meshing with the teeth of said gear of one helix and the other of said pinions meshing with the teeth of said gear of the opposite helix;
- means for adjustably securing said one pinion to said other shaft for regulating the synchronized rotative relation between the shafts;
- and
- means for biasing said other pinion axially relative to said one pinion for controlling backlash between the teeth of the double gear and the pinions.
Dependencies are inferred from the claim text.