| 摘要 |
A bicycle crank assembly of bicycle cranks and axle includes a first crank having a first hole which has a first open end and a second open end opposite the first open end. A first protrusion extends from the inner periphery of the first open end and a second protrusion extends from the first protrusion. The second protrusion has a first restriction face. An axle extends through the first crank and has a third end and a fourth end opposite the third end. The third end has a fixing portion on the outside thereof. The fixing portion has a recessed portion defined in the connection area with the axle. The recessed portion has a second restriction face which is matched with the first restriction face so as to evenly share the stress. |
