VALVE TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

This valve timing control device is provided with a large-diameter ball bearing 43 for bearing a sprocket body 1a and a driven member 9 so that the sprocket body 1a and the driven member 9 can rotate relative to each other, and an adapter 63 interposed between one axial end part 2a of a camshaft 2 and a fixed end part 9a of the driven member. In the driven member, a first fitting groove 9d in the shape of a disc groove is formed in a position faced by one end part of the camshaft; in the adapter, a second concave part 65b in the shape of a disc, into which one end part of the camshaft is fitted from the axial direction, is bent and formed in a position of facing one axial end part of the camshaft in an inner periphery 65; an outer wall forming the second concave part is formed as a convex part 65a that fits into the first fitting groove 9d; and length can be reduced in proportion to the depth of the second concave part.