Starting device for IC engine - has starter motor and free run coupling with spring accumulator for damping thrust-form torque variations

摘要

A sprung shock-absorbing device 28 in a starter motor drive train with an overrunning clutch 20 has an prestress torque of from 15 to 50% of the stall torque of the starting motor 11 and the torsional stiffness of the drive train without the device is at least four times that of the device. The device 28 may be associated with the clutch 20 or the epicyclic speed reducer 14. Helical compression springs (30, Fig 2) may be prestressed between projections (31) on the speed reducer ring gear 15 and its housing 29. Wavy leaf springs (40, 45, Figs 5 to 7) or engaging multiple plate springs (52, 54, Figs. 9 to 12) may replace the helical compression springs.