| 摘要 |
In order to reduce the vibration occurring usually in a DC (Direct Current) motor and causing premature wear and tear of the bearings as well as unwanted noise, a second vibration is generated at the transmission gear. By changing the shape of the teeth (15) of the pinion a constant input is transformed into a pulsating output and vice versa. All pitch points (17,19,20) are positioned on the same central axle (14) but move along this axle according to the actual situation of the engaged gearwheels resulting in a sinus shaped pitch circle.
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