Patent ID: 6699340
Filing Date: 2004-03-02
Classification: F16C

Abstract:
A method for producing a driving shaft including yokes at both ends as parts of respective universal joints and including an intermediate slidable portion composed of a male shaft member and a female shaft member fitted with each other by means of splines, said male shaft member includinga) a hollow shaft member having one end connected to said yoke of the universal joint and having an inner diameter larger than the outer diameter of one end of said female shaft member on the side of said male shaft member, and b) a splined male member having a splined slidable portion slidably fitted in a splined hole of said female shaft member and a fixing portion to be fixed in the inner surface of said hollow shaft member, said method comprising the sequential steps of: a) applying a resin coating to either of said inner surface of said hollow shaft member or said fixing portion of said splined male member, b) inserting and fitting said fixing portion of said splined male member in the inside of said hollow shaft member, and c) fixing said hollow shaft member and said splined male member to each other by means of swelling of the resin and/or restoring force of elasticity of the resin of said resin coating, and wherein a swelling accelerator for swelling the resin of the resin coating is coated on the inner surface of said hollow shaft member or said fixing portion of said splined male member that is not provided with the resin coating.