Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1986-11-07
1988-12-06
Staab, Lawrence
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74762, 74333, F16H 3706
Patent
active
047888873
ABSTRACT:
A gearbox comprises parallel primary or input and secondary or output shafts in a casing. An output gear train of two constant-mesh gearwheels is fastened to the secondary shaft. An independent input gear train of four constant-mesh gearwheels and a first and a second clutch are mounted on the primary shaft. A third clutch is mounted on the secondary shaft. The first and third clutches respectively couple the input train to the primary shaft and to the secondary shaft. A three-element planetary gearset concentric with the primary shaft comprises a sun gear fastened to the input train, a planet carrier coupled to the primary shaft by the second clutch and a ring gear fastened to the output train. Thus the gearbox features three gear ratios by respective combinations of pairs of the three clutches. This arrangement constitutes a basic gearbox. More complex gearboxes derived from the basic gearbox comprise a supplementary gear train and a fourth clutch and/or a first brake and/or a second brake for respectively driving and/or immobilizing the sun gear and/or the planet carrier. This provides numerous additional forward and reverse gear ratios that are always well distributed and easy to control.
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Brown Charles A.
Brown Charles E.
Diehl Dwight G.
Staab Lawrence
Valeo
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