Screw-rotation preventing device and railcar auxiliary power...

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

Patent

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Details

F16B 39/10 (2006.01) B61C 17/12 (2006.01) F16B 41/00 (2006.01)

Patent

CA 2563603

A conventional device for preventing rotation of a bolt is made for a case where the device can be operated from both the bolt side and the nut side. It has been therefore impossible to fasten the bolt and nut together at a place where the device can be operated only from one side and to apply loosening prevention to the bolt. A rotation prevention device of this invention has a body section (7B) having a shaft, on the outer surface of which shaft an external thread is provided, and having a through-hole (7A), through which the shaft of a screw component (4) with a head (4A) with a greater diameter than the shaft can pass and which has a smaller diameter than the head; an engagement section (7C) engaging with the side surface of either a member (2) to be installed or a member (3) on which installation is made; and a head hold- down section (7D) fixed to the body section (7B) so as to clasp and fasten, between the head hold-down section and the body section (7B), the head (4A) of the screw component (4).

Un dispositif traditionnel empêchant la rotation d'un boulon convient dans le cas où il est possible d'actionner le dispositif à la fois du côté du boulon et du côté de l'écrou. Il est donc impossible de fixer ensemble le boulon et l'écrou à un endroit où le dispositif ne peut être actionné que d'un seul côté et d'empêcher ainsi le desserrage du boulon. L'invention concerne un dispositif anti-rotation comportant une partie de corps (7B) possédant un tronc à la surface duquel est ménagé un filetage externe, et comportant un trou traversant (7A) à travers lequel peut passer le tronc d'un composant à vis (4) possédant une tête (4A) dont le diamètre est supérieur à celui de le tronc et dont le diamètre est inférieur à celui de la tête ; une partie d'engagement (7C) s'engageant avec la surface latérale d'une pièce (2) à installer ou d'une pièce (3) sur laquelle s'effectue l'installation ; et une partie de maintien de tête (7D) fixée à la partie de corps (7B) de manière à agripper et fixer, entre la partie de maintien de tête et la partie de corps (7B), la tête (4A) du composant à vis (4).

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