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 arcuate...
Patent
1992-12-07
1994-11-08
Watts, Douglas D.
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 arcuate...
474101, F16H 702
Patent
active
053622804
ABSTRACT:
A power transmission system having: a power transmission belt with a tensile strength such that a force of at least 17 kgf per 1 mm width is required to effect a 1% elongation of the belt; a plurality of pulleys with which the power transmission belt is operatively engaged; and an auto-tensioner having an element to engage the power transmission belt. The auto-tensioner has a damping ratio that is not greater than 20%, where the damping ratio is defined by the following formula: Damping ratio=2[(A-B)/(A+B)].times.100, where A is the force exerted by the auto-tensioner element during up-stroking of the auto-tensioner element and B is the force exerted by the auto-tensioner element during down-stroking of the idler pulley. More preferably, the damping ratio is 10-20%.
REFERENCES:
patent: 4285676 (1981-08-01), Kraft
patent: 4309174 (1982-01-01), Sproul
patent: 4713044 (1987-12-01), Nakamura et al.
patent: 5098347 (1992-03-01), Sajazuk et al.
Hirai Hideo
Mishima Kyoichi
Yamakawa Susumu
Mitsuboshi Belting Ltd.
Watts Douglas D.
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