| 摘要 |
<p>A planet gear (18) includes a tooth portion (24) having a bore (26) extending axially therethrough, a hub (36) disposed within the bore (26) such that an annular space is defined between the hub (36) and the toothed portion (24), and an elastomeric element (46) injection-molded into the annular space. The toothed portion (24) includes a first groove (34) circumferentially disposed in an inner surface (28) of the toothed portion (24), and the hub (36) includes a second groove (44) circumferentially disposed in a peripheral surface (38)of the hub (36). The grooves (34, 44) provide surfaces upon which the injection-molded elastomer can set. Holes (147) may be disposed axially within the elastomeric element to decrease the spring rate of the elastomer, thereby providing additional radial compliancy to the planet gear. A method for manufacturing the gear includes disposing the hub (36) within the bore (26) of the toothed portion (24), injecting the elastomer in the annulus defined by the hub (36) disposed within the bore (26), and curing the injected elastomer. A method for manufacturing the gear having axially disposed holes (147) within the elastomer includes disposing a plurality of pins in the annulus prior to injecting the elastomer, then removing the pins once the elastomer has cured.</p> |
