Machine element or mechanism – Gearing – Interchangeably locked
Patent
1986-04-10
1987-07-07
Herrmann, Allan D.
Machine element or mechanism
Gearing
Interchangeably locked
74411, 74443, 464 24, F16H 308, F16H 5514, F16D 380
Patent
active
046778683
ABSTRACT:
A torsional vibration viscous damper coupling arrangement for a manual transmission countershaft. The coupling includes a first driven gear journalled on the countershaft and in constant mesh with the input shaft gear. A second driven gear is fixed on the countershaft and is in constant mesh with a speed gear journalled on the main shaft. The first and second driven gears each have a set of longitudinally extending mirror image axial teeth sized to mesh in a loose fitting manner. A diametrical through-bore extends through the countershaft intermediate the first and second driven gears. The spaces between the teeth communicate with the through-bore to define a viscous fluid chamber enclosed by a sleeve surrounding the meshed teeth and sealed to the driven gears. Viscous fluid in the chamber provides a dampening medium obviating the transfer of torsion vibrations from the input shaft to the countershaft. Thus, the coupling isolates all the drive shaft speed gears, in mesh with the countershaft drive gears, from any input shaft torsional vibrations.
REFERENCES:
patent: 2738660 (1956-03-01), Gail
patent: 2812648 (1957-11-01), Croset
patent: 3298240 (1967-01-01), McDowell et al.
patent: 3364768 (1968-01-01), Powell
patent: 3398594 (1968-08-01), Keller
patent: 3700083 (1972-10-01), Ashikawa et al.
patent: 3834248 (1974-09-01), Caliri
Barthel Edward P.
Chrysler Motors Corporation
Herrmann Allan D.
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