Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1987-04-09
1989-02-21
Herrmann, Allan D.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
747105, 74785, 180250, F16H 3706, F16H 144
Patent
active
048054852
ABSTRACT:
A power transfer device includes a planetary gear unit which includes a sun gear, a carrier, a ring gear, and a plurality of planet gears journaled on the carrier and in mesh with the sun and ring gears. The planetary gear unit is shiftable between first, second and third positions to establish a high speed two-wheel drive mode in the first position wherein the carrier is engaged with an input shaft and a first output shaft, and the sun gear is engaged with a second output shaft, and the ring gear is disengaged. The planetary gear unit is arranged to establish a high speed four-wheel drive mode in the second position wherein the carrier is engaged with the input shaft and the first output shaft, and the sun gear is engaged with the input shaft and the second output shaft, and the ring gear is disengaged to restrict differential action between the output shafts and is further arranged to establish a low speed four-wheel drive mode in the third position wherein the sun gear is engaged with the input shaft, the carrier is engaged with the output shafts, and the ring gear is locked to restrict the differential action.
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Herrmann Allan D.
Novais David
Toyota Jidosha & Kabushiki Kaisha
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