A preload and retraction device (10, 10') of a wheel assembly comprises a linear guide (11), an internal slider (12) and an external slider (13) movable along the linear guide (11), a linear elastic member (14) arranged to connect the two sliders (12) (13), a first wheel support arm (15) integral with the internal slider (12) and a second wheel support arm (19) integral with the external slider (13), with the external slider (13) carrying a weight support wheel (20) that is actuated and the internal slider (12) carrying a traction wheel (16) that comes into contact with a rolling surface with a preload force that is a function of the geometry of the system. The use of the device (10, 10') is particularly advantageous for supporting the wheels in a self-propelled cart (100) of the type suitable for moving along a railway track for the inspection of the underbody of railway vehicles as it greatly facilitates and at least partially automates the installation of the self-propelled cart (100) on the track.

    Un dispositif de précharge et de rétraction (10, 10') d'un ensemble roue comprend un guide linéaire (11), un coulisseau interne (12) et un coulisseau externe (13) mobiles le long du guide linéaire (11), un élément élastique linéaire (14) agencé pour relier les deux coulisseaux (12) (13), un premier bras de support de roue (15) solidaire du coulisseau interne (12) et un second bras de support de roue (19) solidaire du coulisseau externe (13), le coulisseau externe (13) portant une roue de support de poids (20) qui est actionnée et le coulisseau interne (12) portant une roue de traction (16) qui vient en contact avec une surface de roulement au moyen d'une force de précharge qui est fonction de la géométrie du système. L'utilisation du dispositif (10, 10') est particulièrement avantageuse pour supporter les roues dans un chariot automoteur (100) du type approprié pour se déplacer le long d'une voie ferrée aux fins d'inspection du soubassement de véhicules ferroviaires comme il facilite considérablement et automatise au moins partiellement l'installation du chariot automoteur (100) sur la voie.


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    Title :

    PRELOAD AND RETRACTION DEVICE OF A WHEEL ASSEMBLY AND SELF-PROPELLED CART COMPRISING SAID DEVICE


    Additional title:

    DISPOSITIF DE PRÉCHARGE ET DE RÉTRACTION D'UN ENSEMBLE ROUE ET CHARIOT AUTOMOTEUR COMPRENANT LEDIT DISPOSITIF



    Publication date :

    2023-07-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES



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