Aktiebolaget Skf

Andrea Serafini

Daniele Duch

Fausto Morello

Claudio Foti

Paolo Baratti

Laura Sguotti

Paolo A Re

Cornelius Petrus Antonius Vissers

Carlo Maldera

Flavio Franza

Domenico Bosco

Marco Brunetti

Marco Bresso

Stellario Barbera

Michel Organisciak

Luca Tedeschini

Massimo Russo

Héctor Villalobos

Patrick Le Reun

Raffaele Montagnoni

Edward White Ladell

Roberto Galante

A sealing device for sealing a bearing unit against external contaminants is arranged substantially inside a cavity of the bearing unit and is provided with two annular metal screens and a sealing element made of elastomeric material. The sealing element is rigidly connected to a rotary one of the two annular screens and is provided with a shaped protrusion projecting radially outwardly from a stationary one of the two annular screens to define, together with the stationary screen, an annular opening of the sealing device. The stationary screen and the sealing element also together defining a drainage and flow channel in communication with the outside of the sealing device through the annular opening, in which the drainage and flow channel is entirely linear and extends in an exclusively radial direction within the sealing device to and from the opening.

Sealing device for bearing unit

Sealing device including a first annular element coupled to a first fixed mechanical member, and a second annular element coupled to a second rotating mechanical member, for protecting an annular compartment delimited between the members, the first element being provided with at least one annular sealing lip configured to interact with the second element, which has a radial edge of a flange portion arranged at an edge of a sleeve portion of the first element, thus forming with the latter a radial gap configured as a labyrinth seal; wherein the radial gap of the flange portion of the second annular element carries a plurality of depressions arranged in a crown, spaced adjacently to one another at the radial gap and configured to generate, as a result of the rotation of the second element, a dynamic effect (F) for the purpose of repelling any contaminants impelled towards said radial gap.

Sealing device with dynamic action for rolling bearings

Sealing device for a cartridge of a shock absorbing fork, provided with a screen of metallic material and with an elastomer coating, in turn comprising a radially outer portion which forms a static seal on a cartridge housing and at least one radially inner lip which makes a sliding contact on a moving element of the cartridge, wherein an additional lip forms a seal on a surface of the housing, thus sealing a cavity (V) of the elastomer coating.

Sealing device for bicycle or motorcycle suspensions

Sealing device including a first annular element coupled to a first fixed mechanical member, and a second annular element coupled to a second rotating mechanical member, for protecting an annular compartment delimited between the members; the first element being provided with at least one annular sealing lip configured to interact with the second element, which has a radial edge of a flange portion arranged at an edge of a sleeve portion of the first element, thus forming with the latter a radial gap configured as a labyrinth seal; wherein the radial gap of the flange portion of the second annular element carries a plurality of depressions arranged in a crown, spaced adjacently to one another at the radial gap and configured to generate, as a result of the rotation of the second element, a dynamic effect (F) for the purpose of repelling any contaminants impelled towards the radial gap.

Sealing device with dynamic action, particularly for rolling bearings

Low-friction sealing assembly for a vehicle wheel-hub unit inserted inside an annular interspace defined between a flanged rotating element and a stationary element, coaxial with each other, of the wheel-hub unit to protect at least one ring of revolving bodies arranged between the stationary element and the rotating element, and having a first annular screen and a second annular screen during use integral with the rotating element and with the stationary element; and an annular seal having lips that extend axially and radially projecting from the first screen towards the second screen inside an annular chamber defined by the first and second screens; the sealing assembly being a multi-stage sealing assembly provided with a first inner collecting stage designed to collect and expel some of the contaminants.

Low-friction sealing assembly for a wheel-hub unit and wheel-hub unit equipped with such a sealing assembly

Coupling system of a sealing assembly that has an annular rotating element, the seal assembly provides an annular screen providing a sleeve portion to be integrally coupled with the annular element rotating and a flange portion that protrudes radially from the sleeve portion. The sleeve portion by coupling with a seat mounting of the annular rotating element defined by an outer cylindrical surface of the mounting and including a first circumferential discontinuity cooperating with the sleeve portion to locally increase a reaction force of the cylindrical surface at the first circumferential discontinuity due to elastic radial pressure exerted by the sleeve portion on the mounting seat.

Coupling system of a sealing assembly with a rotating annular element

A procedure for mounting of a hub bearing assembly having a rotatable hub, and a bearing unit having a stationary radially outer ring, and two bodies rolling crowns disposed between the radially outer ring and the hub. The assembly process involves the following steps: a) pressing-fit a first seal on the hub, b) mounting an axially external cage and the axially outside rolling bodies, in correspondence with a track of the axially outer hub, c) the radially outer ring assembly and inclination of the same outer ring of a predetermined angle with respect to the hub, d) mounting of the axially interior rolling bodies in correspondence with a track of the axially inner hub, and the radially outer ring alignment to the hub, f) snap insertion of the axially internal cage on rolling bodies and g) the pressing-fit a second seal on its seat.

Assembly procedure of a bearing unit&#x2014;HUB flange

A method for axially preloading a bearing hub assembly having a rotatable hub, provided with rolling tracks and a bearing unit having a stationary radially outer ring, provided with rolling tracks, and a double row of rolling bodies disposed between the radially outer ring and the hub. The method requires the use of a bias unit and provides the following steps: a) feeding to an assembly station a hub bearing assembly, already assembled; b) verifying the value of the interference (C) between the radially outer ring and the bias unit; c) exerting an axial force (F) radially on the outer ring for the bias unit to deform under compression the radially outer ring that in turn will transmit a force to the rolling bodies via the raceways.

Method for preloading a hub bearing unit

A hub-bearing unit for rotatably is provided with a stationary radially outer ring, a radially inner ring, an annular gasket, and a second metal insert. The radially inner ring includes a flange for mounting a wheel and a sealing device having a first metal insert, annular shaped, steadily fixed at an end portion of the outer ring facing the flange. The annular gasket includes a plurality of elastomeric sealing lips and steadily fixed to the metal insert. The second metal insert is steadily fixed on an axial cylindrical surface of the inner ring. The gasket presents a first axial contacting lip. The first axial contacting lip slidingly contacts a substantially frustoconical portion of the metal insert.

Hub-bearing unit with a sealing device

A sealing assembly comprises a first annular shield presenting an axial sleeve portion for the mounting angularly integral with one of said members, and a flange portion which radially extends from a first end of the sleeve portion, and a sealing member made of elastomeric material presenting an annular root portion, which overhangingly and radially extends from a peripheral edge of the flange portion and a first axially sealing annular lip, as well as a second radially sealing annular lip. The lips extend overhangingly and axially on the opposite side of the first end of the sleeve portion, from a same side as a thinned end of the root portion and are reciprocally and divergingly arranged to form in radial section a V-shape having a vertex facing towards the root portion and an axis parallel to the sleeve portion.

Annular sealing assembly, in particular for wheel hubs

An assembly providing a first annular shield including a sleeve portion integral with a rotating member and with a flange portion, which radially extends to protrude from the first sleeve portion; a second annular shield having a sleeve portion integral with a stationary member and with a flange portion that radially extends to protrude on the opposite side of the sleeve portion of the first shield and facing the flange portion; and an annular seal, which the flange portion of the first shield ends with an L-shaped annular portion that protrudingly radially and axially extends out of an annular gap delimited between the rotating and stationary members to define an L-shaped channel in radial section having constant width and forming a first labyrinth seal; the channel leads into an annular recess, delimited between the second shield and a first lip of the annular seal without contacting the first shield.

Hub bearing unit equipped with a low friction sealing assembly

A wheel hub bearing unit including a plurality of rolling bodies disposed between annular elements. One of the annular elements is a rotating element that includes a spindle on a side facing the outboard side of the vehicle having a mounting flange adapted to receive a vehicle wheel. A frontal surface of the mounting flange is covered by a layer of UV photopolimerizable synthetic plastic material having a predetermined thickness deposited on the frontal surface of the flange in the non-polimerized state by a mixed air spraying nozzle, by rotating the wheel hub bearing unit about a symmetry axis thereof with the nozzle arranged at a radial distance from a peripherally outer edge of the flange, and has a spraying axis which forms, with the symmetry axis, an angle from 20&#xb0; to 80&#xb0;; the synthetic plastic material being sprayed by the nozzle at a temperature higher than the room temperature.

Wheel hub bearing unit for vehicles and associated method

A bearing unit for a vehicle wheel having a radially outer stationary ring provided with an axial lug, with a flange transverse to an axis of rotation and with an annular channel formed between the axial lug and the flange and delimited axially by a bottom surface. A radially inner rotatable ring defining, together with the stationary ring, a space; an encoder fixed onto the inner ring and extending outside of the space and in front of the axial lug; a protective cover mounted on the axial lug to protect the encoder and close off the space and provided with a side wall mounted on the outer cylindrical surface and having a bent edge arranged axially in abutment against the bottom surface of the annular channel; sealing means disposed between the cylindrical side wall and the tubular axial lug to seal the cylindrical side wall on the outer cylindrical surface.

Bearing unit for a vehicle wheel

A hub-bearing assembly () is provided with an outer, stationary, ring (), and an inner ring () with a flange () for mounting a wheel, and the flange () forms an annular relief () projecting in an axially inward direction and having an outer toroidal surface (); a sealing device (), mounted on the outer ring (), has a non-contacting axial lip () which extends axially towards the flange () and has a free end portion () which creates a labyrinth seal with the outer toroidal surface () of the annular relief ().

Hub-bearing assembly with sealing device

A bearing unit for a vehicle wheel is provided having an axis of rotation and a radially outer stationary ring including a tubular axial lug delimited by an outer cylindrical surface, and with a flange transverse to the axis of rotation and axially delimited. A radially inner rotatable ring defines, with the ring, a space. An encoder is fixed to the inner ring and extends outside of the space and in front of the axial lug. A protective cover mounted on the axial lug to protect the encoder and close off the space. The stationary ring includes a shaped annular channel formed across the axial surface and delimited axially by a bottom surface and the side wall with a bent edge arranged axially in abutment against the bottom surface of the annular channel. Sealing means are arranged between the bent edge and the bottom surface to seal the annular channel.

Growing community of inventors

Pinerolo, Italy

Andrea Serafini