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
1989-04-14
1990-02-20
Bui, Thuy M.
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...
F16H 708
Patent
active
049022687
ABSTRACT:
A tensioning device for belts, chains and the like particularly for the camshaft drive of an internal combustion engine, with a tension pulley supported on a movable carrier, with a control element, by which in the case of heating, the carrier can be moved via an actuating element against the action of a pressure spring in the slackening direction of the belt characterized in that, the control element consists of a hollow cylindrical sleeve closed at the one end by a bottom and on the other end has a flange extending radially inwards, against which from the inside a washer abuts, which in its center receives a longitudinally movable and sealed pressure piston, in the annular hollow space between the bore of the sleeve and the pressure piston, the pressure spring is arranged whereby it is supported on one hand on the washer and on the other hand on the pressure piston, between the bottom and the pressure piston, whose end face is at a distance from the bottom, a further pressure spring is arranged which with lower resilience opposes the action of the first mentioned pressure spring and the whole inner area of the sleeve is filled with a gas-free expansion fluid and a method of assembling the same.
REFERENCES:
patent: 4539001 (1985-09-01), Okabe
patent: 4790796 (1988-12-01), Okabe et al.
Goppelt Dieter
Hertrich Steffen
Bui Thuy M.
INA Walzlager Schaeffler KG
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