Locking fastener

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

Patent

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Details

F16B 39/24 (2006.01) F16B 39/12 (2006.01)

Patent

CA 2416814

In a fastener comprising a bolt (3), a nut (2), and a washer (1), a bolt through-hole (5) which is slightly larger than a nominal diameter of the bolt (3) is formed in a base portion (4) of the washer (1), a conical barrel member (6) whose diameter decreases toward an upward position in a bolt axial direction is formed around the bolt through-hole (5) so as to stand therefrom, a continuous slit for a notched circle is formed in the base portion (4) and the conical barrel member (6), the diameter of the conical barrel member (6) of such a washer (1) is decreased by the fastening of the nut (2) and the bolt (3), and the conical barrel member (6) is fitted into a conical hole portion (10) of the nut (2), thereby obtaining a state where the conical barrel member (6) of the washer (1) is bitten and sandwiched between the bolt (3) and the nut (2) . The bolt (3) and the nut (2) are strongly integrated via two kinds of integration routes in the bolt axis orthogonal direction and the bolt axial direction, thereby rationally realizing a large locking effect.

L'invention concerne une fixation comprenant un boulon (3), un écrou (2) et une rondelle (1). Un trou traversant (5) de boulon, présentant un diamètre supérieur au diamètre nominal du boulon (3), est disposé dans la partie base (4) de la rondelle (1). Une pièce tubulaire conique (6) à diamètre réduit en direction du côté supérieur axial du boulon, est disposée dressée autour dudit trou traversant (5), la pièce tubulaire conique (6) de la rondelle (1) comportant une entaille segmentaire en direction de la partie base (4). Cette pièce tubulaire conique (6) présente un diamètre réduit, par le serrage de l'écrou (2) et du boulon (3), et elle est ajustée sur la partie trou conique (10) de l'écrou (2), de sorte à fixer la pièce tubulaire conique (6) entre le boulon (3) et l'écrou (2). Le boulon (3) peut être formé rigide et solidaire de l'écrou (2), par deux types de trajets d'intégration, dans le sens perpendiculaire à l'axe du boulon et dans le sens axial du boulon, de sorte à obtenir un effet de blocage important.

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