Multi-lobular lockbolt

Details Multi-lobular lockbolt Multi-lobular lockbolt

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 39/22 (2006.01)

Patent

CA 2576719

A lockbolt (100, 200) which includes a head portion (102) and a shaft (104) which extends from the head portion (102). The shaft (104) includes at least a portion which is threaded and has a multi-lobular profile. A collar (120) is swageable onto the multi-lobular threaded portion (104), and thereafter the lobes (114) provide that the collar (120) does not tend to vibrate loose from the threading. The fact that the section which has a multi-lobular profile is also threaded provides that the collar (120) (or a conventional threaded nut) can be selectively rotatably removed and re-installed on the lockbolt (100, 200). Before swaging, the collar (120) may initially include a cylindrical bore (130), or a bore (130) which is multi-faceted, preferably generally corresponding to the profile of the multi-lobular portion of the lockbolt (100, 200). The lockbolt (100, 200) may also include a frangible pintail (106, 202), wherein the multi-lobular threaded portion is disposed between the head portion of the bolt and the frangible pintail.

L'invention concerne un boulon de blocage (100, 200) comprenant une partie tête (102) et une partie arbre (104) qui s'étend à partir de ladite partie tête (102). L'arbre (104) comprend au moins une partie filetée et présente un profil à lobes multiples. Un collier (120) peut être embouti sur la partie filetée (104) à lobes multiples, les lobes (114) empêchant que ledit collier (120) ne vibre de manière lâche à partir du filetage. Le fait que la partie présentant un profil à lobes multiples est également filetée permet au collier (120) (ou à un écrou fileté classique) d'être retiré et réinstallé sur le boulon de blocage (100, 200) de manière sélective et rotative. Avant l'emboutissage, le collier (120) peut initialement comprendre un alésage cylindrique (130) ou un trou (130) à facettes multiples correspondant généralement, de préférence, au profil de la partie à lobes multiples du boulon de blocage (100, 200). Ledit boulon de blocage (100, 200) peut également comprendre un pivot frangible (106, 202), la partie filetée à lobes multiples étant disposée entre la partie tête du boulon de blocage et le pivot frangible.

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