초록 ▼

A planet gear drive mounting in the carrier of a speed increasing planetary gear train for driving a diesel engine turbocharger or the like includes a supporting axle carrying an enlarged hub which engages and supports a bearing in the gear, the gear being lightened and the bearing area being enlarg

A planet gear drive mounting in the carrier of a speed increasing planetary gear train for driving a diesel engine turbocharger or the like includes a supporting axle carrying an enlarged hub which engages and supports a bearing in the gear, the gear being lightened and the bearing area being enlarged by the large inner diameter of the bearing (preferably at least 50 percent greater than that of the axle) so that centrifugal force caused bearing loads are reduced and bearing loadings are minimized. Lubrication and other features are also disclosed.

대표청구항 ▼

A turbocharger planetary drive train having an engine driven planet carrier rotatable at a high speed, a ring gear fixed during a drive mode, a sun gear drivably connected with a turbocharger compressor and a plurality of planet gears rotatably carried by the planet carrier and engaging the sun and

A turbocharger planetary drive train having an engine driven planet carrier rotatable at a high speed, a ring gear fixed during a drive mode, a sun gear drivably connected with a turbocharger compressor and a plurality of planet gears rotatably carried by the planet carrier and engaging the sun and ring gears for driving the compressor at an elevated speed greater than that of the planet carrier, wherein the planet carrier includes axially spaced end walls extending radially outward from a rotational axis of the carrier with means in said walls receiving a plurality of removable axles in angularly spaced locations between said walls, said planet gears being rotatably supported on the axles by bearings, and the improvement wherein, the planet gears are made light by having large internal bores of at least 50 percent larger diameter than the diameters of their respective supporting axles, the bearings form said large internal bores and comprise sleeves fixed to the planet gears, said sleeves having internal bearing surface unbroken by grooves or openings, and separate removable large hubs are fixedly mounted on the axles within and engaging the bearings for rotation of the planet gears and bearings on the axle carried hubs, whereby the specific loading and wear on the planet gear bearings is minimized by the relatively low centrifugal forces of the light planet gears on their bearings and the high load carrying area of the large bearings.