Sealing device for a hub/wheel assembly and hub/wheel assembly having such a sealing device

Patent metadata

Field	Value
Publication number	US-2019070897-A1
Application number	US-201816113228-A
Country	US
Kind code	A1
Filing date	Aug 27, 2018
Priority date	Sep 5, 2017
Publication date	Mar 7, 2019
Grant date	—

Abstract

A sealing device for a hub/wheel assembly with a roller bearing. The sealing device includes a guard, made of plastic. The guard is coupled to an outer ring of the bearing to seal off the bearing. The guard has a cylindrical mounting wall with an outer lateral surface coupled to an inner lateral surface of a collar of the outer ring, and a snap-engagement step for engaging with the collar made along the outer lateral surface so that it snap-fits in a contoured annular groove made along the collar about the axis. An annular gasket is made of elastomer and co-injection-molded inside an annular groove made in the cylindrical mounting wall on the same side as the snap-engagement step.

First claim

What is claimed is:

1 . A sealing device for a hub/wheel assembly with a roller bearing, the sealing device having a central axis, the sealing device comprising:
a guard coupled to an outer ring of the bearing so as to seal off the bearing, the guard having a cylindrical mounting wall including a first lateral surface coupled to a second lateral surface of a collar of the outer ring; a snap-engagement for engaging the guard with the collar made along the first lateral surface so that it snap-fits in a contoured annular groove made along the collar about the axis; and an annular sealing arrangement made of an elastomer and arranged inside an annular groove made in the cylindrical mounting wall on the same side as the snap-engagement, the guard being made of plastic and the annular sealing arrangement being co-injection-molded inside the groove and adhering chemically to the plastic of the guard.

2 . The sealing device according to claim 1 , wherein the annular groove is made in the cylindrical mounting wall at an axial distance determined with respect to the snap-engagement means to allow radial deformation of the cylindrical mounting wall with respect to the collar so as to move the annular sealing arrangement away from the collar until the snap-engagement means are snap-fitted in the contoured annular groove.

3 . The sealing device according to claim 2 , wherein the snap-engagement and the annular sealing arrangement inside the groove are arranged on a first outer lateral surface of the cylindrical mounting wall and the contoured annular groove is made along the collar about the axis on a second inner lateral surface of the collar.

4 . The sealing device according to claim 3 , wherein the contoured annular groove has an axial stop element that, when applicable, comes into contact with an end of the cylindrical mounting wall.

5 . The sealing device according to claim 2 , wherein the snap-engagement and the annular sealing arrangement inside the groove are arranged on a first inner lateral surface of the cylindrical mounting wall and the contoured annular groove is made along the collar about the axis on a second outer lateral surface of the collar.

6 . The sealing device according claim 1 , wherein the snap-engagement is defined by a step which is circumferentially continuous, in the form of an annular ridge, or, preferably, by a step which is circumferentially discrete, in the form of bumps which are angularly separated from one another, and this step can interact by snap-fitting with the contoured annular groove to axially engage the guard with the collar.

7 . The sealing device according claim 1 , wherein the snap-engagement is defined by a step which is circumferentially continuous, in the form of a step which is circumferentially discrete, in the form of bumps, which are angularly separated from one another, and this step can interact by snap-fitting with the contoured annular groove to axially engage the guard with the collar.

8 . A hub/wheel assembly comprising an outer ring, in stationary use, an inner ring, in rotational use, at least one row of rotating bodies interposed between the outer ring and the inner ring, and a sealing device with a central axis, comprising:
a guard, which is coupled to an outer ring of the bearing so as to seal off the bearing, and which has a cylindrical mounting wall having a first lateral surface coupled to a second lateral surface of a collar of the outer ring; and snap-engagement means for engaging the guard with the collar made along the first lateral surface so that it snap-fits in a contoured annular groove made along the collar about the axis; the hub/wheel assembly being characterized in that the sealing device further comprises annular sealing arrangement made of elastomer and arranged inside an annular groove made in the cylindrical mounting wall on the same side as the snap-engagement means; the guard being made of plastic and the sealing means being co-injection-molded inside the groove and adhering chemically to the plastic of the guard.

Assignees

• Skf Ab

Inventors

• Falossi Marco
• Bertola Maurizio
• Missiaggia Giorgio

Classifications

• F16C19/184

  in O-arrangement · CPC title

• B60B2310/204

  by moulding, e.g. injection moulding, i.e. casting of plastics material · CPC title

• B60B27/0005

  with ball bearings · CPC title

• B60B27/02

  adapted to be rotatably arranged on axle · CPC title

• B60B27/0073 Primary

  characterised by sealing means · CPC title