Mechanical safety mechanism for vertical or oblique...

B - Operations – Transporting – 66 – F

Patent

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Details

B66F 7/02 (2006.01) B66F 3/08 (2006.01) B66F 7/14 (2006.01)

Patent

CA 2610385

A safety nut (220) received slidingly in a seat (205) through which a threaded bar (203) passes, is coupled with front interlocking (209B, 220A) with the lifting nut (209); release occurs when wear of the thread of the lifting nut (209) exceeds a safety limit; an axial stop formed of a bearing (228) rests on the safety nut (220) to support the load mechanically interrupting movement. A warning switch (250) is activated by the safety nut before said mechanical shut-down.

L'invention concerne un écrou de sécurité (220) reçu coulissant dans un siège (205) traversé par une barre filetée (203). Cet écrou est couplé à un interverrouillage avant (209B, 220A) à l'aide d'un écrou de levage (209). Une libération s'opère lorsque l'usure subie par le filetage de l'écrou de levage (209) dépasse la limite de sécurité. Une butée axiale constituée par un palier (228) repose sur l'écrou de sécurité (220) pour prendre en charge le mouvement d'interruption mécanique de charge. Un commutateur d'alarme (250) est activé par l'écrou de sécurité avant l'arrêt mécanique.

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