Trochoidal tooth gear assemblies for in-line mechanical power tr

Details Trochoidal tooth gear assemblies for in-line mechanical power tr Trochoidal tooth gear assemblies for in-line mechanical power tr

1996-05-09

1998-10-13

Marmor, Charles A.

Planetary gear transmission systems or components

Planet periphery surrounds axis of interacting gear

Gear has plural circumferential tooth sets

475180, F16H 132

Patent

active

058205047

ABSTRACT:
Trochoidal tooth form gear assemblies for in-line mechanical power transmission, gear reduction and differential drive employ internally meshed gear sets having differing numbers of trochoidal gear teeth, all of which are in continuous contact as one gear rotates and orbits relative to another. Coupling and output rotors having external trochoidal gear teeth profiles rotate and/or orbit in mesh with conjugate internal trochoidal gear teeth in stators or coupling rotors. A differing number of teeth between the meshed external and internal gear teeth provides gear reduction of rotational speeds through axially aligned input and output shafts. In certain embodiments, couplers are eccentrically mounted upon axially extending pins to translate the orbital motion of a meshed gear to shaft rotation. The gear sets can be combined in series to provide various gear reduction ratios as functions of the differing number of meshed gear teeth. In a differential transaxle trochoidal gear assembly, coupling rotors having internal and external gear teeth are eccentrically mounted back-to-back 180.degree. out of phase within a single internally-toothed ring gear to rotate in unison at constant speed rotation of the axles and in opposite directions upon differential axle speeds. Hypotrochroidal gear tooth forms are also described.

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"Power Flow from the Motor" (Theory of Operation/Power Flow from the Motor) from the John Deere Manual pp. 250-10-10 to 250-10-13, Jul. 1989.

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