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The demand of low noise in a reducer is increasing in the use in the place near a public facility. A reducer generates noise as vibrations of its gears propagate to the shaft, bearings and ultimately to the housing, which then radiates solid noise according to its vibration characteristics. For the gears, which are the source of vibrations, preventive measures have already been taken. However, no measures have been studied to prevent the gearbox housing from radiating noise. This report describes the method for designing a low-noise housing based on FEM analysis and the effect of the new housing obtained with a trial product.
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