Provided is construction and a manufacturing method of an inner shaft for an extendable and contractible shaft for which finishing for forming a synthetic resin coating layer 19a on the outer-circumferential surface of a male spline section 14b can be performed easily, while at the same time an increase in weight thereof is suppressed. A concave groove 22 that extends in the axial direction is provided on the outer-circumferential surface of the male spline section in a state so as to be continuous in the axial direction with one male spline groove 23 of the male spline grooves 23 of the male spline section 14b. A portion of the concave groove 22 that is separated in the axial direction from the male spline section 14b is used to perform phase alignment of a cutting tool for performing a finishing process of a coating layer 19a and unevenness in the circumferential direction of the male spline section 14b.
INNER SHAFT FOR TELESCOPIC SHAFT AND PRODUCTION METHOD THEREOF
INNENWELLE FÜR TELESKOPISCHE WELLE UND HERSTELLUNGSVERFAHREN DAFÜR
ARBRE INTERNE DESTINÉ À UN ARBRE TÉLESCOPIQUE ET SON PROCÉDÉ DE PRODUCTION
2019-08-21
Patent
Elektronische Ressource
Englisch
INNER SHAFT FOR TELESCOPIC SHAFT AND PRODUCTION METHOD THEREOF
Europäisches Patentamt | 2015
|