FIXING STRUCTURE OF BOSS

Japanese Patent JPS59121227

A

PURPOSE:To enable to carry out disassembling and reassembling easily by making a position adjustment in the circumferential direction unnecessary, by providing an annular groove, whose depth is made larger than a height of the returns to be generated through a bite by a protrusion of the tip, on the surface of a shaft against which the tip of a fixing screw abuts. CONSTITUTION:An annular groove 7 concentric with the external circumference is provided on the surface of a shaft 2 confronting with the tip of a fixing screw 4 of a boss and returns 6 rising through a bite into the surface of the groove 7 by a protrusion 8 are generated. Then if the outside diameter of the groove 7, the inside diameter of the boss and a height of the returns are given as (d), D and delta respectively, the groove 7 satisfying the relation d