Valve timing adjusting device for internal combustion engine has outer circumferential surface of each protrusion of second toothed wheel provided with surface section reduced radially inwards towards radial center of protrusion

摘要

The valve timing adjusting device has an outer circumferential surface of each protrusion (49) of a second toothed wheel (33) provided with a reduced surface section (62,63) which is reduced radially inwards towards a radial center (Q) of the protrusion along a radial line (L) of the second toothed wheel which runs through the radial center of the protrusion so that it has a reduced radial value compared with a radial value of the rest of the outer circumferential face of the protrusion.