The present invention relates to a power transmission device including two or more pistons. The power transmission device may include: a housing arranged to form a mounting space by connecting a clutch housing, a clutch connecting portion, a clutch hub and a disk housing to each other; a power transmission hub selectively and operably connected to the housing; a plurality of first friction disks splined to an interior circumference of the disk housing; a plurality of second friction disks splined to an exterior circumference of the power transmission hub and disposed alternately with the first friction disks; a piston module including two or more pistons, each of which has a corresponding piston chamber, and selectively and frictionally coupling the first friction disks with the second friction disks by an operating hydraulic pressure supplied to the piston chambers; and at least one return spring or at least one separating spring supplying a spring load counteracting against an axial force generated by the operating hydraulic pressure, and disposed at an inside or an outside of the piston module, wherein friction material is attached to any one surface or both surfaces of each first friction disk or each second friction disk.


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    Title :

    POWER TRANSMISSION DEVICE HAVING TWO OR MORE PISTONS


    Additional title:

    KRAFTÜBERTRAGUNGSVORRICHTUNG MIT ZWEI ODER MEHR KOLBEN
    DISPOSITIF DE TRANSMISSION DE PUISSANCE AYANT DEUX OU PLUS DE DEUX PISTONS


    Contributors:

    Publication date :

    2019-03-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen



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