Gear rattle damper for countershaft transmissions

Details Gear rattle damper for countershaft transmissions Gear rattle damper for countershaft transmissions

1989-02-24

1991-07-23

Herrmann, Allan D.

Machine element or mechanism

Gearing

Interchangeably locked

74409, 74411, 464 97, 464160, F16H 308, F16D 356

Patent

active

050333232

ABSTRACT:
A manual transmission (14') having a counter-shaft assembly (50) with a torsion damping mechanism (34) disposed therein to mitigate in-gear rattle of transmission gears. The countershaft assembly is mounted for rotation in a transmission housing (36). Assembly (50) includes a cluster gear (58) having a plurality of ratio gears (68-76) fixed thereto, a driven gear (60) journaled on the cluster gear and stops (58f, 60g) to limit relative rotation. The torsion damping mechanism includes a torsion bar (64) fixed at its ends to driven and cluster gears (60, 58), an energy damper having coulomb friction surfaces engaged by Belleville springs (80) and by opposing axial forces provided by helical gear teeth of the countershaft assembly.

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