Lock nut with low on/high off torque control

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

Patent

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Details

F16B 39/28 (2006.01)

Patent

CA 2570607

A lock nut (10) having a plurality of sides (16) having a crimp radius (18) which is consistent with the radius of the threaded bore (14) in the lock nut (10). Preferably, the lock nut (10) is crimped using a three sided die (52), each die having a crimp radius (118) with relief angles (56). The relief angles (56) are provided at a desired angle to result in the desired amount of contact area between the lock nut (10) and the die (52). The device (40) includes a housing (42), and the housing (42) includes at one end (44) a threaded bore (46) which is configured to mount on a ram. An opposite end (48) of the housing (42) provides a tapered die section (50) in which the three sided die (52) is disposed. The three sided die (52) is engaged with a locking die base (66) which is movable within the housing (42).

L'invention concerne un contre-écrou (10) comprenant une pluralité de côtés (16) possédant un rayon de sertissage (18) compatible avec le rayon de l'alésage fileté (14) dans le contre-écrou (10). De préférence, le contre-écrou (10) est serti au moyen d'une matrice à trois côtés (52), chaque matrice comprenant un rayon de sertissage (118) à angles de dépouille (56). Ceux-ci (56) sont placés au niveau d'un angle souhaité, de manière à obtenir la quantité souhaitée de zone de contact entre le contre-écrou (10) et la matrice (52). Le dispositif (40) comprend un boîtier (42) présentant, au niveau d'une extrémité (44), un alésage fileté (46) conçu pour être monté sur un vérin. Une extrémité opposée (48) du boîtier (42) présente une section de matrice tronconique (50) dans laquelle la matrice à trois côtés (52) est disposée. La matrice à trois côtés (52) vient en contact avec une base de matrice de verrouillage (66) mobile dans le boîtier (42).

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