| 摘要 |
A hub bearing unit comprising an outer ring; an inner ring rotating about a common symmetry axis of the outer ring and of the inner ring; a flange which extends radially from the outer ring; a plurality of rolling bodies interposed between the outer ring and the inner ring; a sealing assembly and a protective shield for the sealing assembly, arranged on the side opposite to the flange. The protective shield is constituted by a metal sheet and comprises a cylindrical portion that can be mounted integral with a stationary axle, and a flange portion, extending radially on the outside of the cylindrical portion, facing the sealing assembly, from a first end of the cylindrical portion opposite to the flange of the outer ring. A cylindrical portion second end is provided radially inwards with an L-fold which delimits an annular axial shoulder cooperating in abutment with the inner ring. |
| 主权项 |
1. A hub bearing unit, designed to be mounted on an axle, stationary in use, of a piece of machinery, in particular an axle of a piece of agricultural machinery, the hub bearing unit comprising:
an outer ring; a receiving flange, which extends radially on the outside from a first end of the outer ring and which is adapted to receive one of a tool or a vehicle wheel in use; an inner ring, arranged within the outer ring, the inner ring being adapted to be mounted integral with the axle in use; rolling bodies, interposed between inner and outer rings to operatively connect the inner ring to the outer ring so that the outer ring is free to rotate about a common symmetry axis of the inner and outer rings; a sealing assembly, arranged on the side opposite to the receiving flange and integrally carried by a second end of the outer ring, opposite to the first end; and a protective shield, arranged facing the sealing assembly, on the side opposite to the first end of the outer ring; wherein, in combination: i) the protective shield comprises a cylindrical mounting portion adapted to be mounted, in use, integral with the stationary axle, and a flange portion, which extends radially on the outside of the cylindrical mounting portion starting from a first end of the cylindrical mounting portion opposite to first end of the outer ring; ii) the flange portion and the cylindrical mounting portion of the protective shield have substantially the same thickness, measured in axial direction for the flange portion and in radial direction for the cylindrical portion; iii) the sealing assembly is radially driven on the outside of the cylindrical mounting portion of the protective shield, with the flange portion of the protective shield axially interposed between the sealing assembly and an environment external to the outer ring; iv) the protective shield is constituted by a folded, sheared metal sheet and v) the cylindrical mounting portion of the protective shield has a second end, opposite to the first end and facing toward the receiving flange of the outer ring, which second end of the cylindrical mounting portion is provided with a radially inner L-shaped end fold, which defines a frontal edge, facing the inner ring, of the protective shield, the L-fold delimiting an annular axial shoulder of the protective shield cooperating in axial abutment with the inner ring on the side opposite to the first end. |
