PULSER PLATE MOUNTING STRUCTURE

摘要

A pulser plate mounting structure in which a key groove (14) is formed in a mounting surface (10) of a rotation wall section (9) having a crank arm (3) and a counter weight (4), a key section (16) engaging with the key groove (14) is formed on a pulser plate (P) superposed on the mounting surface (10), and the pulser plate (P) is secured to the rotation wall section (9) by a securing member (18). The key section (16) is constructed from an arcuate band-like section (16a) arcuately projecting from the pulser plate (P) toward one end face of the pulser plate and engaging with the key groove (14), and from a pair of connection sections (16b) for integrally connecting both ends of the arcuate band-like section (16a) to the pulser plate (P). The pulser plate mounting structure enables highly accurately positioning of the pulser plate on a crankshaft and provides excellent productivity of the pulser plate.