Design Optimization of an Integrated E-Type Multilink Suspension Wheel-Side Drive System and Improvement of Vehicle Ride Comfort

Table 12

Comparison of gears before and after optimization.

		First level		Second level
		Driving gear	Driven gear	Driving gear	Driven gear
Preoptimization gear parameters	Number of teeth	31	78	29	76
	Normal modulus (mm)	2.1	2.1	2.3	2.3
	Tooth width (mm)	20	18	25	23
	Helix angle (°)	34	34	22	22
	Volume of each gear (mm^3)	1.017 × 10^5	5.519 × 10^5	1.057 × 10^5	6.421 × 10^5
	Total volume (mm^3)	1.401 × 10^6
	Total mass (kg)	10.93
Postoptimization gear parameters	Number of teeth	38	103	34	85
	Normal modulus (mm)	1.5	1.5	2.25	2.25
	Tooth width (mm)	12	9	17	14
	Helix angle (°)	34	34	21	21
	Volume of each gear (mm^3)	4.455 × 10^4	2.455 × 10^5	8.965 × 10^4	4.614 × 10^5
	Total volume (mm^3)	8.411 × 10^5
	Total mass (kg)	6.56