Annular joint surfaces of a lower case of a strut bearing device respectively have case-side projections that project in an axial direction. Shapes A of the case-side projections, seen in an axial direction, continue in a circumferential direction, and vary their position in a radial direction along the circumferential direction. An inner-diameter side seal has a seal-side recess fitted to the case-side projection. An outer-diameter side seal has a seal-side recess fitted to the case-side projection.

A sealed bearing assembly includes seal members each including a seal lip with multiple protrusions, and being arranged such that oil passages are defined between the seal lip and a seal sliding surface which is configured to slide circumferentially relative to the protrusions such that the oil passages communicate with a bearing internal space and an exterior of the bearing, and prevent passage of foreign objects having particle diameters larger than a predetermined value therethrough. The seal lip and the seal sliding surface are arranged such that, when the bearing rotates, lubricating oil in the oil passages is pulled into spaces between the seal lip and the seal sliding surface such that a fluid lubricating condition is created between the seal lip and the seal sliding surface, due to a wedge effect.

A wheel bearing apparatus has a magnetic encoder 14 mounted on an inner ring 5 opposing the rotational speed sensor 16, via the cap 10 and an air gap. The cap 10 has a cylindrical fitting part 10a press-fit into an inner circumference of an end of the outer member 2. A shielding part 10c extends radially inward from the fitting part 10a and has an annular disc shape. A detection part 16a of the rotational speed sensor 16 is arranged close to or in contact with a side surface of the shielding part 10c. The cap 10 is formed of austenitic stainless steel sheet based on SUS 304. The carbon (C) content is reduced and the nickel (Ni) content is increased. A difference of magnetic flux density between a martensitic transformation part and non-martensite part is 1.4 mT or less.

An integrated plastic shield bearing assembly including a plastic shield for preventing contamination of running surfaces of a bearing assembly is disclosed. The integrated plastic shield bearing assembly includes an inner bearing ring defining an inner race, an outer bearing ring defining an outer race, and a plurality of rolling elements supported between the inner race and the outer race. A first one of the inner bearing ring or the outer bearing ring includes a circumferential groove. The plastic shield includes a molding portion molded on to the circumferential groove of the first one of the inner bearing ring or the outer bearing ring, and a shield portion extending towards a second one of the inner bearing ring or the outer bearing ring.

A sealed bearing assembly includes seal members each including a seal lip formed with multiple protrusions, and arranged such that oil passages are formed between the seal lip and a seal sliding surface which slides circumferentially relative to the protrusions such that the oil passages communicate with the bearing internal space and the exterior of the bearing, and prevent passage of foreign objects having particle diameters larger than a predetermined value therethrough. The seal lip and the seal sliding surface are arranged such that when the bearing rotates, lubricating oil in the oil passages are pulled into the spaces between the seal lip and the seal sliding surface such that fluid lubricating condition is created between the seal lip and the seal sliding surface, due to the wedge effect.

An integrated plastic shield bearing assembly including a plastic shield for preventing contamination of running surfaces of a bearing assembly is disclosed. The integrated plastic shield bearing assembly includes an inner bearing ring defining an inner race, an outer bearing ring defining an outer race, and a plurality of rolling elements supported between the inner race and the outer race. A first one of the inner bearing ring or the outer bearing ring includes a circumferential groove. The plastic shield includes a molding portion molded on to the circumferential groove of the first one of the inner bearing ring or the outer bearing ring, and a shield portion extending towards a second one of the inner bearing ring or the outer bearing ring.

An instrumented bearing, which includes an outer race and an inner race between which a rolling chamber is delimited. Rolling bodies are disposed in the rolling chamber. The bearing additionally includes a member isolating the rolling chamber from the outside; and a measuring device including at least one sensor adapted to measure at least one operating parameter of the instrumented bearing. At least one measuring device can be mounted to the member isolating the rolling chamber from the outside.

A strut bearing including an improved seal configuration is disclosed. The strut bearing includes an upper carrier including a first outer axially extending rim and a first inner axially extending rim, and a lower carrier including a second outer axially extending rim and a second inner axially extending rim. The first outer axially extending rim at least partially surrounds the second outer axially extending rim. A rolling bearing is supported between the upper and lower carriers. A seal includes at least one sealing lip and a reinforcement rim, and the at least one sealing lip is molded on to the reinforcement rim. The seal extends between the first outer axially extending rim of the upper carrier and the second outer axially extending rim of the lower carrier.

The present invention is intended to provide a machine component composed of metal and rubber that results in no increase of material costs for an adhesive or increase of manufacturing costs for metal molding, causes no contamination of the metal mold or generates no foreign matter on the metal mold due to adhesion of the adhesive at the time of molding, causes no failure by separation of the adhesive from a fitting portion at the time of fitting the metal component, and is clean and favorable in appearance. A machine component 1 composed of metal and rubber is formed by applying a thermoset resin adhesive A to a surface of a metal component 2 of a predetermined shape, and vulcanizing and adhering a rubber 3 of a predetermined shape to part of the surface of the metal component 2 by metal molding.

The present invention is intended to provide a manufacturing method of a protective cover having a sensor holder part that has high adhesion strength between a metallic component and a plastic component and maintains high reliability over a long period of time.

The manufacturing method includes: a step of applying a thermoset resin adhesive to a surface of a metallic component 1A including a joining surface relative to a plastic component; a drying and solidification step of evaporating a solvent contained in the adhesive under a temperature condition at a temperature lower than a temperature at which the adhesive starts cross-linking reaction; and an injection molding step of placing the metallic component 1A as an insert in dies 18 and 19 and injecting a molten plastic material from a gate 20 into cavities.