| 主权项 |
1. A vehicle hub bearing unit comprising:
an outer ring, wherein the outer ring is stationary in use; a wheel hub, rotating in use about a common symmetry axis of the outer ring and of the wheel hub, the wheel hub being arranged within the outer ring and comprising a wheel flange that extends radially from the wheel hub and radially on the outside of the outer ring; a plurality of rolling bodies interposed between the outer ring and the wheel hub; at least one sealing assembly comprising at least one annular lip, the sealing assembly being interposed between the wheel hub and the outer ring on the side of the wheel flange; the wheel flange being delimited between a first and a second mutually opposing radial extending faces, the first face facing the outer ring and the second face facing the opposite side of the outer ring; and a protective ring which surrounds the outer ring and which radially extends from the outer ring in a position facing the first face of the wheel flange; wherein:
i) the first face of the wheel flange is provided with a first annular step that axially protrudes towards the outer ring and which is arranged in a radial position between a radially outermost lip of the sealing assembly and a radially outer peripheral edge of the wheel flange;ii) the protective ring overhangingly radially extends from the outer ring beyond the first annular step and comprises a radially outer section which overhangingly axially extends from the outer ring and towards the wheel flange;iii) the radially outer section of the protective ring has a radially outer peripheral end rim which axially extends towards of the first face of the wheel flange so as to form therewith a labyrinth seal oriented in radial direction, parallel to the first face;iv) the radially outer section of the protective ring extends in axial direction and also in radial direction, so that the radially outer peripheral end rim thereof:v) is arranged beyond the first annular step in axial direction, so that the protective ring axially overlaps on the first annular step;vi) is arranged in a radial position which is far from the first step and such that it exerts no labyrinth seal action therewith;vii) the first annular step being obtained on the first face of the wheel flange in a radial position arranged substantially flush with a first end facing the wheel flange of a fixing portion of the protective ring driven on a radially outer lateral surface of the outer ring;viii) the protective ring comprising a flange portion facing the wheel flange and extending radially from the first end;ix) the flange portion comprising the radially outer section of the protective ring, wherein the radially outer section is arranged obliquely to the first face of the wheel flange, and a radially inner section of the protective ring, connecting the fixing portion and the radially outer section of the protective ring, wherein the radially inner section is arranged parallel to the first face of the wheel flange; andx) an obtuse angled bend being present between the radially outer section and the radially inner section of the protective ring, which bend is arranged radially on the outside of the first step. |
