In a ceramic rotor and metal shaft assembly, a ceramic rotor has a protruded portion and is joined at the protruded portion to a recessed portion of a metal shaft by shrinkage fit or the like fitting method of fixedly holding the protruded and recessed portions relative to each other by making the mating circumferential surfaces of the protruded and recessed portions pressed against each other. The recessed portion has a minimum thickness wall between a circumferential wall and a bottom wall. The protruded and recessed portions have a set relationship of 0.05 </= t/D </= 0.2 where t is a thickness of the minimum wall portion of the recessed portion and D is an outer diameter of the protruded portion. <IMAGE>
申请公布号
DE472171(T1)
申请公布日期
1992.08.13
申请号
DE19910113949T
申请日期
1991.08.20
申请人
NGK SPARK PLUG CO., LTD., NAGOYA, AICHI, JP
发明人
YOSHIKAWA, C/O NGK SPARK PLUG CO.,LTD., TAKAYA;ISHIDA, C/O NGK SPARK PLUG CO., LTD., NOBORU, NAGOYA CITY, AICHI PREF., JP