Arrangement of a wheel hub connected to a constant velocity joint provided with a seal device

摘要

Arrangement including a portion of a radially outer lateral surface of an inner ring of wheel hub having an annular step formed on a constant velocity joint. The step is adapted to receive a first shield, a flange portion that radially extends to protrude towards an outer ring of a wheel hub, in front of a flange portion of a second shield, from a first end of a sleeve portion of the first shield facing on the side opposite of the constant velocity joint and axially protrudes from the inner ring and towards the joint, defining a tubular element arranged straddling wheel hub and an outer ring of the constant velocity joint, having an opposite second end, supporting an annular seal; an annular signal generating insert covers a face of the flange portion, wherein a radially inner annular part of face defines a thrust shoulder for mounting the first shield.

主权项

1. An arrangement of a wheel hub connected to a constant velocity joint provided with a seal device, comprising:
a sealing assembly disposed between an inner ring and an outer ring of the wheel hub, the sealing assembly extends straddling between the wheel hub and an outer ring of the constant velocity joint; wherein: the sealing assembly comprises a first shield and a second shield anchored by a first sleeve portion and a second sleeve portion, respectively, to the inner ring and to the outer ring of the wheel hub, respectively, and each having a respective flange portion which radially extends protruding from the sleeve portion and towards the second shield, and an annular sealing element carried by one of the first shield and the second shield provided with a plurality of annular sealing lips which cooperate with the second shield; the flange portion of the first shield carrying a signal generating element on the outer side thereof and towards the constant velocity joint consisting of an annular insert, wherein,
i) the seal device comprising a portion of a radially outer lateral surface of the inner ring, an annular step formed on side of the portion of the radially outer lateral surface of the inner ring located proximate the constant velocity joint and at an end of the inner ring facing the constant velocity joint, the annular step being adapted to receive the first shield;ii) the flange portion of the first shield extends radially overhangingly towards the outer ring and in front of the flange portion of the second shield, from a first end of the sleeve portion facing the side opposite to the constant velocity joint, wherein the flange portion of the first shield is arranged on the wheel hub on the side of the second sleeve portion located opposite of the constant velocity joint and wherein the first shield has in radial section the shape of an L facing the constant velocity joint;iii) the sleeve portion of the first shield overhangingly axially extends from the inner ring and towards the constant velocity joint, the sleeve portion being shaped to define a cylindrical tubular element arranged straddling the wheel hub and the outer ring of the constant velocity joint, the sleeve portion having a second end, opposite to the first end and facing the constant velocity joint, supporting an annular seal made of an elastomeric material and which radially extends protruding from the second end of the sleeve portion of the first shield, towards the inside of the tubular element defined by the sleeve portion of the first shield, up to intercept with interference a substantially cylindrical outer lateral surface of the outer ring of the constant velocity joint, for exerting a radial seal on it;iv) the annular insert forming the signal generating element, the annular insert being implemented as an annular insert having a predetermined thickness, measured in an axial direction, of one of a magnetizable elastomeric or a plastic synthetic material, the annular insert being chemically anchored to a first face of the flange portion of the first shield facing the constant velocity joint, and the annular insert being shaped wherein a radially inner annular part of the first face, immediately adjacent to the first end of the sleeve portion of the first shield is adapted to define a first thrust shoulder for mounting the first shield on the annular step; the annular insert extending to cover the first face, leaving uncovered the annular part constituting the first thrust shoulder,v) the first end of the sleeve portion of the first shield is fluid-tightly coupled against and on the annular step of the radially outer lateral surface of the inner ring wherein a second face of the flange portion of the first shield, opposite to the first face and facing an opposing side of the constant velocity joint, cooperates in axial abutment against an axial shoulder facing the constant velocity joint and at least partially defined by the annular step; andvi) the axial shoulder, against which the second face of the flange portion of the first shield cooperates in abutment is defined by the annular step and by an annular protrusion formed on the same portion of the radially outer lateral surface of the inner ring as the annular step is formed, the annular protrusion being formed in a position immediately adjacent to the annular step and flush with the annular step on an opposing side of the constant velocity joint with respect to the annular step.