Construction of a double-row tapered-roller bearing unit that is able to improve the contact state between the rolling contact surfaces of plural tapered rollers and a first inner-ring raceway (7) and second inner-ring raceway (8), and a method of manufacturing the same are provided. The inclination angle θ1 of the first inner-ring raceway (7) and the inclination angle θ2 of the second inner-ring raceway (8) in a state before the first inner ring (10) and the second inner ring (11) are press-fitted onto the fitting surface section (13a) of the hub main body (12a), the amount of decrease δθa in the inclination angle of the first inner-ring raceway (7) and the amount of decrease δθb in the inclination angle of the second inner-ring raceway (8) occurring due to press-fitting of the first inner ring (10) and the second inner ring (11) onto the fitting-surface section (13a), and the amount of increase δθk in the inclination angle of the first inner-ring raceway (7) occurring due to formation of the crimped section (15) are adjusted, so that the inclination angle φ1 of the first inner-ring raceway (7) and the inclination angle Θ2 of the second inner-ring raceway (8) in a state after the crimped section (15) has been formed are kept within respective proper ranges.


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    Title :

    Double-row tapered roller bearing unit and method for manufacturing same


    Contributors:

    Publication date :

    2017-02-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F16C SHAFTS , Wellen / B60B VEHICLE WHEELS , Räder für Fahrzeuge



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