Automotive accessory drive pulleys incorporating spiral type...

F - Mech Eng,Light,Heat,Weapons – 16 – D

Patent

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Details

F16D 41/07 (2006.01) F02B 67/06 (2006.01)

Patent

CA 2209636

In an accessory drive system for an internal combustion engine, in one of the pulleys (P1 - P6) (e.g. on the engine crankshaft, the alternator, a hydraulic pump) is incorporated a one-way clutch to isolate oscillations from the engine. The clutch preferably has roller bearings (5) in a saw tooth spiral channel (23), defined by an inner and/or an outer slipper member (3, 105, 106), which/each of which engages a cylindrical bearing race (4a, 15, 29) of an adjacent inner or encircling member (2, 4). The slipper member (3, 3a) may be split and elastically sprung against the adjacent bearing race (4a, 15, 29) or segmented, the springs (6, 6a, 110) being interposed between the rolling bearings (5, B1 to B11).

Dans un système d'entraînement d'accessoires destiné à un moteur à combustion interne, une des poulies (P1-P6) (montée par exemple sur le vilebrequin du moteur, l'alternateur, une pompe hydraulique) comprend un embrayage à roue libre destiné à amortir les variations de régime du moteur. Cet embrayage comporte de préférence des roulements à rouleaux (5) disposés dans un espace en spirale en dents de scie (23) défini par un patin interne et/ou externe (3, 105, 106) qui entre en prise avec un chemin de roulement cylindrique (4a, 15, 29) d'un élément interne adjacent ou disposé de façon circonférentielle (2, 4). Ce patin (3, 3a) peut être fractionné et plaqué élastiquement contre le chemin de roulement adjacent (4a, 15, 29) ou être segmenté. Des ressorts (6, 6a, 110) sont intercalés entre les rouleaux (5, B1 à B11).

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