Fifth wheel locking mechanism

B - Operations – Transporting – 62 – D

Patent

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Details

B62D 53/10 (2006.01)

Patent

CA 2226103

A novel interconnection of the jaw (42), wedge (26) and operating handle (21) in a fifth wheel (11) facilitates the provision of an indicator (58) on a secondary locking mechanism which further insures the security of the system. In the invention, the jaw (42) is connected to the operating handle (21) by a pivoting timing lever (31) which pivots off a pin (41) on the jaw (42) such that the jaw (42) remains engaged with the fifth wheel (11) until the wedge (26) is substantially removed from engagement with the jaw (42). In cooperation with the primary locking mechanism, a secondary lock is provided at the end of the operating handle (21) such that a pawl arrangement (51) engages a stop (63) on the fifth wheel assembly (11) until positively released by the operator. The pawl arrangement (51) further has a mechanical indicator (58) which extends beyond the fifth wheel assembly (11) and allows the operator to determine whether the king pin (16) is engaged and the secondary lock is activated.

L'invention se rapporte à un nouveau mécanisme d'arrimage de la mâchoire (42), de la cale (26) et du levier de manoeuvre (21) d'une sellette d'attelage (11), qui facilite l'établissement d'un indicateur (58) sur un mécanisme de verrouillage secondaire assurant lui-même la sécurité du système. La mâchoire (42) est reliée au levier de manoeuvre (21) par un levier d'attente pivotant (31) qui fait pivoter une cheville (41) sur la mâchoire (42) de sorte que cette mâchoire (42) reste en prise avec la sellette d'attelage (11) jusqu'à ce que la cale (26) se désengage sensiblement de la mâchoire (42). En combinaison avec le mécanisme de verrouillage primaire, un système de verrouillage secondaire est prévu à l'extrémité du levier de manoeuvre (21): il consiste en un dispositif à cliquet (51) qui prend appui sur une butée (63) de l'ensemble sellette d'attelage (11) en attendant la libération effective du mécanisme par l'usager. En outre, le dispositif à cliquet (51) est doté d'un indicateur mécanique (58) qui s'étend au-delà de l'ensemble sellette d'attelage (11) et permet à l'usager de déterminer si le pivot d'attelage (16) est engagé et si le système de verrouillage secondaire est activé.

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