Fixing structure for mounting member of a nut

摘要

At least one end portion of a nut threadably engaged with a screw shaft is provided a mounting member mounting stepped portion, a radial through-hole is formed in the peripheral surface of the stepped portion and a radial pin insertion aperture is formed in the peripheral surface of a mounting member correspondingly to the through-hole, and an engagement recess is formed at a location whereat the through-hole and the pin insertion aperture are connected together. A pin member is provided with a protruded portion on the barrel portion thereof. The pin member is elastically deformed and inserted into the through-hole, and the tip end thereof is brought into engagement with the pin insertion aperture to fix the mounting member and bring the protruded portion into engagement with the engagement recess, thereby preventing the pin member from slipping out.