Arrangement in a wheel lifting mechanism

B - Operations – Transporting – 62 – B

Patent

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Details

B62B 5/02 (2006.01) B60B 33/00 (2006.01) B60B 33/04 (2006.01)

Patent

CA 2475041

The present invention relates to an arrangement in a wheel lifting mechanism designed to lift at least one wheel (1) running on an underlying surface so that it is capable of negotiating an obstacle (h) rising above the underlying surface. The arrangement comprises an element (7) which is formed with a contour convexly curved towards the underlying surface and is moveably supported in relation to the axle of the wheel (1). The said element is designed, when the contour of the element (7) engages with the obstacle (h), to bring about the said lifting of the wheel (7) as the element (7) is rotated about its point of engagement with the obstacle (h). The arrangement further comprises a chassis (4), to which the wheel axle is firmly connected. Between the chassis and the element (7) there is an operative connection designed, when the element (7) engages with the obstacle (h), to allow the chassis (4) firstly to undertake lifting of the wheel (1) from a home position of the element (7) during a displacing movement relative thereto in the direction of movement of the wheel, and secondly to bring about a return to the home position once the wheel (1) has been lifted to the level of the obstacle (h).

La présente invention concerne un dispositif compris dans un mécanisme de levage de roues conçu pour lever au moins une roue (1) roulant sur une surface sous-jacente, de telle manière que la roue peut passer un obstacle (h) dépassant au-dessus de la surface sous-jacente. Ce dispositif comporte un élément (7) formé d'un contour convexe en direction de la surface sous-jacente et il est soutenu de façon amovible en relation avec l'axe de la roue (1). Lorsque le contour de l'élément (7) rentre en contact avec l'obstacle (h), cet élément est conçu pour provoquer le levage de la roue (7), à mesure que l'élément (7) tourne autour de son point d'engagement avec l'obstacle (h). Ce dispositif comporte aussi un châssis (4), auquel est bien relié l'axe de la roue. Entre le châssis et l'élément (7), lorsque l'élément (7) rentre en contact avec l'obstacle (h), une connexion fonctionnelle permet au châssis (4) dans un premier temps d'entreprendre le levage de la roue (1) d'une position initiale de l'élément (7), pendant un mouvement de déplacement correspondant dans le sens du mouvement de la roue, et, dans un deuxième temps, d'entraîner un retour à la position initiale, une fois que la roue (1) a été élevée au niveau de l'obstacle (h).

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