Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Guide roll mounted for movement of its axis along...
Patent
1981-01-23
1983-09-06
Staab, Lawrence J.
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
Guide roll mounted for movement of its axis along...
74110, G01F 314
Patent
active
044026773
ABSTRACT:
A device for tensioning the endless drive belt for vehicle accessories. An L-shaped housing is mounted in a fixed position adjacent the drive belt. A stub shaft is slidably mounted on the housing and has an idler pulley rotatably mounted on an extended end of the shaft. A pair of cam plates having mutually engageable camming surfaces are slidably mounted in the housing. One of the plates is operatively engaged with the stub shaft and imparts sliding movement to the shaft for moving the idler pulley into tensioning engagement with the drive belt. A compression spring biases the camming plates into sliding engagement with each other moving the pulley toward tensioning engagement with the drive belt. The included angles of the cam plate camming surfaces equal 90.degree. with the angle of the camming surface of the stub shaft engaged cam plate being greater than the angle of the camming surface of the cam plate which is engaged by the tensioning spring whereby a greater force is required to move the pulley in a nontensioning direction than in the belt tensioning direction, achieving better damping and reduced vibration.
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Bednarek Michael D.
Dyneer Corporation
Staab Lawrence J.
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