MAKISHINKO ALL PRODUCTS GUIDE
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WDtimetimet1t2t3n1n3n2T1T2T3tOutput speedLoad torgue20SA seriesSelection Example of Planetary Gear DriveIn the case of truck drive1.A calculation of the load torque(1)A driving pattern2.Examination of the allowable torque(Cf. rating list) 36.1Nm>15.20:Average load torque for 100W 3.Examination of the peak torque(Cf. rating list) 108Nm>40.57Nm 4.Examination of the maximum torque at the time of an emergency(Cf. rating list) 5.Examination of the allowable radial load(Cf. rating list) 6.Examination of the allowable axial load(Cf. rating list) (2)The output torque in routine Run resistance moment : T2= 9.8W・D(μd/2+f) = 12.56Nm (3)Acceleration/Deceleration torque ①GD2 of the transporting object GD2=1/2W・D2=61.25kgm2 ②Acceleration torque T1=9.8GD2・n/375・t1=28.01Nm・・・Acceleration torque (T1+T2) 40.57Nm ③Deceleration torque T3=9.8GDt2・n/375・t3=18.67Nm・・・Deceleration torque (T2+T3) 31.23Nm (4)Average load torque Tm={(t1T13+t2T23+t3T33)/(t1+t2+t3)}1/3=15.20Nm (5)The decision of the reduction ratio I=Nt/n=85.7 Nt:Rated input rotation speed(3000r/min) (6)The temporary selection of the model number from performance list (Select temporarily SA19S81) Select the most nearest value 81 from reduction ratio values.NotationW D d n V T1 T2 T3 t1 t2 t3 μ fTotal weight Wheel Wheel shaft diameter Output shaft rotation speed Moving speed Acceleration torque Torque in routine Deceleration torque Time in acceleration speed Time in routine speed Time in Deceleration speed The friction coefficient of bearing and others The coefficient of friction of a wheel and the rail ExplanationAn initial value / unit100kg 0.5m 0.05m 35rpm 54.98m/min ※Nm ※Nm ※Nm 2sec 30sec 3sec 0.05 0.05

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