Fifth wheel slip plate

Details Fifth wheel slip plate Fifth wheel slip plate

B - Operations, Transporting

62

D

B62D 53/08 (2006.01)

Patent

CA 2104343

A novel improved fifth wheel structure is provided of the type including a fifth wheel plate having an upper bearing face and a rearwardly opening slot having a closed forward end for use in conjunction with a kingpin plate of the type including a lower bearing face from which a kingpin projects downwardly, the fifth wheel plate being adapted to have the kingpin plate disposed thereover with the respective bearing faces in contact with each other and with the kingpin rotatingly and captively disposed in the forward end of the slot. The improvement comprises a plurality, e.g., preferably three, four or five, self-lubricating slip pads, each such slip pad being formed of self-lubricating plastic polytetrafluoroethylene or ultra-high molecular weight polyethylene. Each slip pad is substantially rectangular in shape with four rounded corners and has only its peripheral edges tapered or rounded to be lower than its central region. Each slip pad has a plurality of circular counterbored holes therein, each circular counterbored holes terminating in a circular hole. Each slip pad is secured into its respective rectangular recess within the upper bearing face of the fifth wheel plate, by means of an associated one of a plurality of weld washers, each of which has been placed in its respective circular counterbored hole in its associated slip plate and then welded to the fifth wheel plate.

Cette invention concerne un nouveau dispositif d'attelage amélioré du type à sellette caractérisé par une surface portante supérieure comportant une fente ouverte vers l'arrière et destinée à recevoir en appui la contre-sellette à pivot d'attelage d'une semi-remorque. L'ensemble est étudié pour que les surfaces supérieure et inférieure de la sellette et de la contre-sellette respectivement soient en contact et que le pivot d'attelage soit retenu à l'extrémité avant de la fente de la sellette sans qu'il soit empêché de tourner. L'amélioration prend la forme d'une pluralité d'inserts de glissement auto-lubrifiants, de préférence au nombre de trois, quatre ou cinq, en polytétrafluoroéthylène ou en polyéthylène de masse moléculaire très élevée. Chaque insert de forme sensiblement rectangulaire comporte des coins arrondis et seules ses rives sont biseautées ou arrondies. Chaque insert comporte par ailleurs une série de trous circulaires fraisées dans leur partie supérieure. Enfin, chaque insert est fixé dans son logement rectangulaire au moyen de rondelles à souder placées dans les trous fraisées susmentionnés et effectivement soudées à la sellette d'attelage.

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