Machine element or mechanism – Gearing – Backlash take-up
Patent
1987-02-11
1989-05-09
Braun, Leslie A.
Machine element or mechanism
Gearing
Backlash take-up
464 97, F16H 5518
Patent
active
048277860
ABSTRACT:
There is provided a backlash control rotation gear assembly for robotic applications, with such assembly comprising an input device to provide rotational force of a predetermined maximum torque. The system further includes a first drive gear which is connected to the rotational input device and a second drive gear which is connected to the first drive gear by an elastic torsion spring preloaded with a predetermined spring torque force. An output driven gear is connected to a moveable robotic part to be rotated, with such driven gear being connected to the first and second drive gears, wherein the first drive gear is driven by the rotational input device and the second drive gear is driven indirectly by the input device through the preloaded elastic torsion spring. The preloaded torque force of the elastic torsion spring maintains the intermeshing teeth of the first and second drive gears and the driven gear is loaded, substantially constant contact, thereby eliminating gear backlash normally encountered in such gear systems.
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Anchell Scott
Braun Leslie A.
Cincinnati Milacron Inc.
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