HOLLOW SHAFT MADE OF A MATERIAL HAVING A LOW MODULUS OF ELASTICITY, WITH DRIVE ELEMENTS SECURED THEREON BY EXPANDING THE SHAFT

摘要

An assembly includes a hollow shaft formed of a material having a modulus of elasticity of less than 150,000 N/mm2, and drive elements secured on the shaft by expansion of the shaft. The shaft and the drive elements have a relationship such that: ?FA > 0.6 ?Fw EA/Ew ¢(rwa/rwi)2 - 1!, and rAi - rwa > ?Fw/Ew - rwa. In this relationship, ?FA is the yield point and EA is the modulus of elasticity of the material of the drive elements in N/mm2. ?Fw is the yield point and Ew is the modulus of elasticity of the material of the shaft in N/mm2. rwa is the outside radius and rwi is the inside radius of the shaft and rAi is the inside radius of the drive element, in mm.