A bearing cover (10) has a bearing receiving space (18) for a bearing (9) and has a fastening region (17) for fastening the bearing cover (10) to a housing body (7). The bearing receiving space (18) of the bearing cover (10) is decoupled electrically from the fastening region (17) of the bearing cover (10) to prevent an undesired flow of electric current across the bearing (9).

An electric machine (10) has a rotor (15) and a stator (11). The rotor (15) has a rotor shaft (16) and a rotor laminated core (17). The stator (11) has a housing (12) with a housing cover (14) and a stator laminated core (13). The rotor shaft (16) is mounted rotatably in the housing (12) via bearings (18, 19). Each bearing (18, 19) has a bearing inner ring (18a, 19a) that bears against the rotor shaft (16), and a bearing outer ring (18b, 19b) that bears against the housing (12). Sections (24) of the housing (12) against which the respective bearing outer ring (18b, 19b) bears are formed from a light metal alloy material or a light metal material that has a transformed material structure such that the housing (12) is of electrically insulating configuration in these sections (24).

A non-conventional, low temperature, process for applying a thin electrically insulating coating arrangement with high density, high purity, minimal porosity, and improved adhesion strength to a steel bearing component is provided. The bearing component is formed from steel and machined or otherwise formed to a near net shape. A high purity aluminum is electro-chemically deposited on the steel bearing component using a non-aqueous electrolyte in an inert environment to form a high purity aluminum coating at least over a portion of the steel bearing component. A surface of the high purity aluminum coating is then converted by an acid-bath into aluminum oxide to form an insulating layer. A bearing component and a bearing having such components is also provided.

A bearing device includes first and second rings each having end faces and being configured to rotate relative to one another, and the second ring has an annular groove. A socket having an electrically insulating sleeve is mounted on the second ring with the insulating lining radially interposed between the second ring and the socket. End faces of the electrically insulating lining each have an annular groove with a bottom that is offset axially inward relative to the respective first and second end faces of the second ring and to the respective first and second end faces of the socket. A method includes grinding end faces of the socket and/or second ring to reduce an axial depth of the grooves in the insulating layer.

A thrust roller bearing includes: a plurality of rollers which are radially arranged; a retainer having a pocket which is formed in a circular ring shape as a whole and rollingly retains the plurality of rollers; and at least one raceway ring which is provided with a race surface on which the plurality of rollers roll. The raceway ring includes an iron raceway ring and a resin raceway ring having insulating properties, and the iron raceway ring and the resin raceway ring are integrally assembled by being engaged with each other. In addition, the raceway ring may include a resin raceway ring having insulating properties and a pair of iron raceway rings disposed on both front and back surfaces of the resin raceway ring, and the pair of iron raceway rings and the resin raceway ring may be integrally assembled by being engaged with each other.

The aim of the invention is to provide a running gear with a mount for a brake linkage on a bogie, wherein the mount has a long service life and requires little maintenance. The transmission of shocks and vibrations between the brake linkage and the bogie is reduced, and the bogie and the brake linkage are electrically insulated from each other. A running gear for a rail vehicle including a bogie and a brake linkage is proposed, having at least one bearing element. The brake linkage is mounted on the bogie and/or is connected to the bogie by means of the at least one bearing element, and the at least one bearing element has a plastic and/or consists of a plastic.

The present invention relates to an insulated shaft joint (1) for electrically insulating a rotational member (2) from an end section of a shaft (3) to which the rotational member (2) is connected. The insulated shaft joint (1) comprises a plurality of first grooves (4) arranged in an outer surface of the end section of the shaft (3) and extending in an axial direction of the shaft (3), one or more rows of electrically insulating members (5), and an annular electrically insulating cage (6) arranged circumferentially around the plurality of first grooves (4). The insulating cage (6) comprises one or more rows of through-going openings (7), arranged circumferentially. The through-going openings (7) is being shaped and dimensioned so that they are adapted to surround and guide the insulating members (5). The rotational member (2) is arranged circumferentially around the annular electrically insulating cage (6). The rotational member (2) comprises a plurality of second grooves (8) arranged in an inner surface of the rotational member (2) and extending in an axial direction of shaft (3). The through-going openings (7) in the insulating cage (6) are arranged aligned with the plurality of first grooves (4) and the plurality of second grooves (8). The insulating members (5) are arranged in the through-going openings (7) of the insulating cage (6) and in the first and second grooves, so as to be adapted to transfer torque from the shaft to the rotational member (2) via the insulating members (5).

A rolling bearing having an annular inner ring and an annular outer ring in relative rotation around a central axis and rolling elements housed between raceways provided in the two rings. At least one of the rings includes two concentric annular ring parts made of metallic material, and an annular layer made of electrically insulating material, the layer being accommodated between the two parts.

An insulated bearing includes an outer ring, an inner ring, and a plurality of rolling elements. At least one of the outer ring and an inner ring is made of metal, the plurality of rolling elements are provided between the outer ring and the inner ring, so as to be freely rolled, and at least one of the outer ring and an inner ring is coated with an insulating layer. The insulating layer is formed of a mixture in which silicon carbide and/or aluminum nitride as an additive are/is dispersed in aluminum oxide as a base matrix. The content of the additive is 1 to 40 mass % with respect to the total amount of the mixture.

A rolling bearing according to an embodiment includes a stationary ring having a first facing surface, a rotating ring having a second facing surface facing the first facing surface, and rotating relative to the stationary ring, rolling elements arranged between the first facing surface and the second facing surface, a cage that retains the rolling elements, first electrodes and second electrodes fixed in position relative to the stationary ring and arranged in a bearing space between the stationary ring and the rotating ring, third electrodes fixed in position relative to the rotating ring, position relative to the rolling elements, or position relative to the cage and arranged in the bearing space, and an insulating film formed on surfaces of the first electrodes and the second electrodes or surfaces of the third electrodes.