| 摘要 |
<p>A toothed wheel suitable for automotive vehicle use comprising a generally circular sheet metal body (12) having an outer, free, end marginal section (18) thereof, annularly bent so as to initially provide: a first, tooth-end defining, annular wall-portion (20) having a generally radially-outward extent; a middle, tooth-body defining, annular wall-portion (22) having a generally axial extent; and a second, tooth-end defining, annular wall-portion (24), having a generally radially-inward extent. The tooth-defining, annular wall-portions (20, 22, 24) have a series of annularly spaced, radially-inwardly extending depressions formed therein by metal movement, so as to finally define therebetween a series of regularly occurring teeth, presenting continuous exterior trough surfaces (36), sidewall surfaces (38), crest surfaces (40), and first and second closed end surfaces (42 and 44). The trough, sidewall, and crest surfaces (36, 38, 40) of the teeth are defined by the sheet metal of the middle, tooth-body defining, wall-portion (22), and the first and second closed end surfaces (42 and 44) of the teeth are defined by the sheet metal of the first and second, tooth-end defining, wall-portions (20 and 24).</p> |
