Self-energizing anti-rattle device
AssigneeBorg-Warner Corporation
InventorDan Joseph Showalter
Life of this patent
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Abstract
Self-energizing anti-rattle apparatus particularly adapted for eliminating gear rattle encountered in modern manual transmissions is characterized by the provision of a device which is activated for imposing a drag on the first ratio output gear when the transmission either is in neutral with the clutch engaged or is in reverse. The device includes a lost motion mechanism to prevent imposition of the drag while the first ratio output gear is being engaged, thereby eliminating any tendency to bind during engagement.
Claims6
In combination, a rotatable shaft, first and second rotatable gears, said gears being engageable selectively with said shaft for rotation therewith in one direction of rotation respectively at a first relatively slow speed and a second relatively high speed, a wire spring engaged with said first gear for rotation therewith, and a sleeve supported on said shaft by a lost motion connection allowing slight relative rotation therebetween, said wire spring being coiled around said sleeve for establishing frictional engagement therewith, said wire spring being coiled so as to loosen in response to engagement of said second gear with said shaft, thereby decreasing said frictional engagement.
In a transmission, a rotatable input element, a rotatable output member, gear means having a neutral condition in which no torque is transmitted between said input element and output member and a drive condition in which torque is transmitted between said input element and output member selectively in a plurality of gear ratios, said gear means including a rotatable gear member engageable with said output member for establishing a low gear ratio, and anti-rattle means establishing frictional engagement between said members through a lost motion connection, rotation of said gear member relatively faster than said output member in said neutral condition tending to increase said frictional engagement, and rotation of said gear member relatively slower than said output member in a gear ratio other than low tending to decrease said frictional engagement.
In a transmission, a rotatable input shaft, a rotatable output shaft, gear means having a neutral condition in which no drive is transmitted between said shafts and a drive condition in which drive is transmitted between said shafts selectively in a plurality of forward gear ratios and a reverse gear ratio, said gear means including a rotatable gear engageable with one of said shafts in a first forward gear ratio, and anti-rattle means rotatable in response to rotation of said gear and in frictional engagement with said one shaft through a lost motion connection, relative rotation between said gear and said one shaft in one direction tending to increase said frictional engagement after a predetermined relative rotation determined by said lost motion connection, and relative rotation between said gear and said one shaft in another direction tending to decrease said frictional engagement.
Dependencies are inferred from the claim text.