国上清支大华 Involute Profile ▣The relation between involute curve and the base circle. A N, 圆上泽夫通大华 Involute Profile 1.Ik= Ip or cosok= COSOK K 2.0K=∠N0A-0k =NA-as NK-ax -tgas-ax Ip using:invak=tgak-ak Ik=- Ip Involute equation: osOk invak=tgak-ak 1414  The relation between involute curve and the base circle. Involute Profile k A1 A2 O1 O2 N1 N2 αk 1. rK = ——— rb cosK or cosK = — rK rb 2. K = ∠NOA - K = ——— - K NA rb = ——— - K NK rb = tgK - K using： invK = tgK - K . . Involute equation:{ rK = ——— rb cosK invK = tgK - K . K K K K rK rb O N A Involute Profile