The invention relates to a bottom bracket (1) for bicycles comprising a central pin (2), a first adapter (8) radially outer with respect to said central pin (2) and intended to be associated with a box (102) for housing the bottom bracket, a first rolling bearing (6) radially arranged between said central pin (2) and said first adapter (8), a sealing gasket (30) arranged in axially outer position with respect to said first rolling bearing (6), radially outer with respect to said central pin (2) and directly exposed to the outside. The sealing gasket (30) comprises a first axially outer end (34) provided with a first lip (31) and a second lip (32) axially more inner with respect to the first lip (31), said first lip (31) being in constant fluid-tight relationship with said central pin (2). When the sealing gasket (30) is deformed, said second lip (32) moves from a more outer radial position, in which the second lip (32) is radially outer with respect to the first lip (31) and in which the second lip (32) does not exert a fluid-tight seal on said central pin (2), to a more inner radial position, in which the second lip (32) is in fluid-tight relationship with said central pin (2).


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    Title :

    BICYCLE BOTTOM BRACKET


    Additional title:

    FAHRRADTRETLAGER
    PÉDALIER DE BICYCLETTE


    Contributors:

    Publication date :

    2019-06-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer / B60B VEHICLE WHEELS , Räder für Fahrzeuge / F16C SHAFTS , Wellen



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