Damped driven disc assembly
AssigneeDana Corporation
InventorAndrzej Szadkowski
Life of this patent
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Abstract
A damped driven disc assembly comprises a disc concentrically mounted with respect to a hub, wherein the disc is driven by engagement with a flywheel and the hub drives an output shaft. A plurality of pairs of beam springs have first ends secured to the disc and second ends secured to the hub at points angularly spaced, in one embodiment, about 180.degree. from one another and, in another embodiment, about 0.degree. from one another. In a specific preferred embodiment, the assembly includes three pairs of beam springs.
Claims21
A disc assembly useful as a damper when disposed between a flywheel and a shaft, the disc assembly comprising:
- a hub secured circumferentially to the shaft, the hub including outwardly extending radial projections;
- a disc separate from the hub and concentrically positioned with respect thereto, the disc including a central opening bordered by an arcuate groove which receives portions of the outwardly extending radial projections;
- a plurality of beam springs, wherein each beam spring has a first end and a second end, the first ends of the beam springs being attached to the disc at first points, and the second ends of the beam springs being attached to the hub at second points which are angularly displaced when undeflected about 150.degree. to about 210.degree. from the first points, the beam springs being engaged only at the ends thereof.
In a drive train including a flywheel having a driving surface, a disc assembly in proximity with the driving surface, and a clutch plate for normally urging the disc assembly into engagement with the driving surface, the disc assembly comprising a hub fixed circumferentially to a shaft and a disc coaxially mounted with respect to the hub and the shaft;
- the improvement comprising:
- a plurality of beam springs, each having first and second ends wherein the first ends of each of the beam springs are pivoted to the disc at first pivotal locations and the second ends of each of the beam springs are pivoted to the hub at second pivotal locations which, for each beam spring, are angularly displaced from the first pivotal locations when undeflected by an angle in the range of greater than 180.degree. but less than about 210.degree., the angle being sufficient to provide a partially negative spring characteristic during operation of the drive train;
- the beam springs being engaged only at the ends thereof.
In a drive train including a flywheel having a driving surface, a disc assembly in proximity with the driving surface, and a clutch plate for normally urging the disc assembly into engagement with the driving surface;
- the disc assembly comprising a hub fixed circumferentially to a shaft and a disc coaxially mounted with respect to the hub and the shaft;
- the improvement comprising:
- a plurality of outwardly extending radial projections on the hub and a central opening through the disc bordered by an arcuate groove which receives portions of the outwardly extending radial projections on the hub;
- a plurality of beam springs, each having first and second ends wherein the first ends of each of the beam springs are pivoted to the disc at first pivotal locations and the second ends of each of the beam springs are pivoted to the hub at second pivotal locations which, for each beam spring, are angularly displaced from the first pivotal locations when undeflected by about 150.degree. to 210.degree., the beam springs being engaged only at the ends thereof.
In a drive train including a flywheel having a driving surface, a disc assembly in proximity with the driving surface, and a clutch plate for normally urging the disc assembly into engagement with the driving surface, the disc assembly comprising a hub fixed circumferentially to a shaft and a disc coaxially mounted with respect to the hub and the shaft;
- the improvement comprising a plurality of beam springs, each having first and second ends wherein the first ends of each of the beam springs are pivoted to the disc at first pivotal locations and the second ends of each of the beam springs have elongated slots therein which are pivoted on pins projecting from the hub at second pivotal locations which, for each beam spring, are angularly displaced when undeflected from the first pivotal locations by about 150.degree. to 210.degree., the beam springs being engaged only at the ends thereof.
Dependencies are inferred from the claim text.