Bearing wheel hub unit

#The present invention relates to a bearing wheel hub unit.

#In general, bearing wheel hub units of a well known kind comprise a mounting flange which is integral with an inner race of the bearing in order to mount a wheel, and a centering collar, which is defined by an annular body which is produced in a single piece with the flange by means of removing shavings, and which extends frontally and transverse to the flange itself in order to permit the centering of the wheel in relation to the unit itself.

#Bearing wheel hub units of the kind which have just been described above present some disadvantages due to the fact that, once the centering collar has been produced by means of turning, it is then necessary to subject the same centering collar to anti-corrosion treatment, which can only be carried out after the centering collar has been carefully cleaned and, in the case in which such treatment is carried out at a certain temperature, it must also be carried out in such a way as to ensure that no damage is suffered by the other components of the unit.

#The present invention will now be described with reference to the attached drawings, which illustrate a non-limiting for of embodiment of the present invention, and in which:

#FIG. 1 is a section view of a first preferred form of embodiment of a bearing wheel hub unit according to the present invention;

#FIG. 2 is a section view, with some parts removed for reasons of clarity, of a second preferred form of embodiment of the bearing wheel hub unit which is shown in FIG. 1; and

#With reference to FIG. 1, the number 1 refers to a bearing wheel hub unit in its entirety.

#The unit 1 presents a rotation axis A, and comprises a bearing 2 which is provided with an inner race 21 which can rotate around the axis A, and a mounting flange 3, which is integral with the race 21, and which is arranged transverse to the axis A, and which presents a number of passing attaching holes 34 which are uniformly distributed around the axis A in order to fix a wheel (which is noted but not illustrated).

#The unit 1 also comprises a centering collar 4, which is fixed to the flange 3 at the end of the production cycle of the unit 1, and which extends from a frontal surface 31 of the flange 3 itself in order to permit the centering of the above-mentioned wheel in relation to the unit 1, or rather in relation to the axis A.