| 摘要 |
A bicycle crank shaft set comprising a hollow shaft 1 with cylindrical splines 2 at each end, crank arms (3a, bb) with matching splines 6, tapered plugs 4 to be inserted into each end and end caps 5 for finishing the assembly. The splines 2 may have longitudinal slots therein, and the tapered plugs 4, when installed, cause the splined end of the shaft 1 to expand and firmly hold the crank 31, 3b. |
