Preloaded antibacklash gear assembly
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United States of America Patent
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May 9, 1989
Grant Date -
N/A
app pub date -
Feb 11, 1987
filing date -
Feb 11, 1987
priority date (Note) -
Expired
status (Latency Note)
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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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