Analysis and Optimization of the Vibration and Noise of a Double Planetary Gear Power Coupling Mechanism

Table 1

Gear parameters of the front and rear planet rows.

Parameters	Front planet row			Rear planet row
	Sun	Planets	Internal gear	Sun	Planets	Internal gear
Tooth number	30	23	78	22	18	58
Face width (mm)	27.5	25	25	50	35	35
Direction	Left	Right	Right	Left	Right	Right
Module (mm)	1			1.5
Pressure angle	20°			20°
Helix angle	25°			30°