| 摘要 |
PCT No. PCT/JP88/00097 Sec. 371 Date Sep. 1, 1988 Sec. 102(e) Date Sep. 1, 1988 PCT Filed Feb. 3, 1988 PCT Pub. No. WO88/05864 PCT Pub. Date Aug. 11, 1988.An engine starter comprises a hollow armature rotary shaft having a plurality of cam surfaces of an over-running clutch mechanism and having at one end a reduced-diameter portion on which a sleeve member is press fit and at the other end a stopper. The sleeve member has a rolled portion on its outer circumference on which an armature core is secured by press fit so that the armature core is firmly held by the sleeve member and the stopper on the armature rotary shaft. The armature rotary shaft may have a polygonal cross-sectional outer configuration so that the armature core can be firmly press-fit onto polygonal armature rotary shaft. A method for concurrently brazing and magnetically annealing the armature core comprises heating the armature assembly between 780 DEG C. and 850 DEG C. |
