Harmonic Planetary® Gearhead
Harmonic Drive LLCUpdated 04/14/2015
Building a high precision actuator is easily achieved by coupling any servomotor to one of our precision Quick Connect™ gearheads. The thin wall flexible gear technology used for HarmonicDrive® gearing is applied to the internal gear of our planetary gear speed reducers. It allows the internal gear to deform elastically thus maintaining low backlash for the life of the gearhead, without the need for adjustment.
Planetary gears have simultaneous meshing between the sun gear and planet gears and between the planet gears and the internal gear. Some manufacturers try to reduce the backlash by controlling the dimensional precision of the parts, however this causes interference of meshing parts due to dimensional errors, resulting in uneven input torque and noise. Harmonic Planetary gears use a thin wall elastic internal gear which allows a preload of the gear and compensates for interference between meshing parts. The Harmonic Planetary® gear series incorporates this internal gear which maintains low backlash for the life of the speed reducer.
-Low backlash: Less than 3 arc-min (Less than 1 arc-min also available)
-Low gear ratios, 3:1 to 50:1
-High load capacity by integrating structure with cross roller bearing
Planetary Gear Principle
Planetary gears have simultaneous meshing between the sun gear and planet gears and between the planet gears and the internal gear. The sun gear is connected to the motor and a carrier, supporting the planet gears, is connected to the output. Single stage planetary gears can achieve reduction ratios up to 10:1. Ratios above 10:1 utilize a two stage design where the carrier of the first stage drives the sun gear of the second planetary stage.
Model: HPN, HPG, HPF, CSF-GH, CSG-GH, HPGP
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