Gear hub end of hollow shaft - fits into pinion and has holes in shaft's outer surface and ridge on shaft end

摘要

The cog-hub end (2) of a hollow shaft (1) fits into a pinion (6). Holes (7) are pressed into the hollow shaft's outer surface at the points of the pinion's (6) gaps (9) between the teeth at the end of the cog hub (2). - The end of the hollow shaft (1) is in the form of a ridge fitting into the gaps (9) in the pinion (6).