Connecting apparatus for bicycle or motorcycle fork and method

摘要

The pieces to be reciprocally connected are mechanically manufactured with tolerances such that the outer diameter of the ends of the tubes (6, 6 @ ) is suitably greater than the inner diameter of the seats of the ends of the crowns (1). The crowns are heated to a temperature which does not cause a permanent deformation in the pieces and which is such as to slightly increase the diameter of their seats. The tubes instead are inserted by their ends to be connected, in a liquid nitrogen bath that suitably restricts the outer diameter of said ends and brings them substantially to a condition of equality or inferiority with respect to the diameter of the dilated seats of the ends of the crowns. The cooled ends of the tubes are then inserted into the heated end of the seats of the crowns and when the pieces return to room temperature, they are connected with the predetermined tightness.