Abstract: A bearing device includes a bearing having first and second rings, a bushing having first and second annular parts each having an axially extending cylindrical portion and radially inwardly extending annular collar and an electrically insulating lining overmolded between and connecting the first and second parts of the bushing and the second ring. The radial collar of the first part of the bushing extends radially beyond a surface of the second ring and includes a plurality of circumferentially spaced through-holes. The insulating lining includes a plurality of blind holes, each extending axially inward from one of the through-holes, and bottoms of the blind holes are axially spaced from the second ring.

Abstract: A bearing device includes a bearing having first and second rings, a bushing and an electrically insulating insert overmolded between and connecting the bushing and the second ring. A key is mounted in aligned slots of the bushing, the insert and the second ring to lock them against relative rotation. The key includes a retaining pin, at least one circumferentially extending support member connected to the retaining pin, and at least one radial bead on the circumferentially extending support member projecting into a radially facing groove to form an interference fit and hold the retaining pin in the slots of the bushing, insulating insert and the second ring.

Abstract: A bearing device includes a bearing having first and second rings configured to rotate relative to each other about a central axis, a bushing, and an electrically insulating insert overmolded between and connecting the bushing and a second radial side of the second ring. A surface of the bushing facing the second ring includes at least one groove extending circumferentially around a groove axis, at least one rib of the electrically insulating insert extends into the at least one groove, and the at least one groove axis is radially offset from the central axis.

Abstract: An electrical machine includes a non-rotating part, a rotating part, at least one bearing that includes a rotating ring and a non-rotating ring and supports the rotating part, a grounding brush fixed and secured to the non-rotating part, and having a free end extending towards the rotating ring of the bearing, and a conductive layer covering a portion of a surface of the rotating ring of the bearing such that the free end of the grounding brush is in contact with the conductive layer.

Abstract: A bearing device includes first and second rings, a bushing and an electrically insulating insert overmolded between and connecting a cylindrical surface of the bushing and a cylindrical surface of the second ring. A connecting chamfer connects one cylindrical surface of the bushing to a front face of the busing, and the connecting chamfer includes a first convex surface extending from the cylindrical surface of the bushing and having a first radius of curvature, a second convex surface extending from the front surface of the bushing and having a second radius of curvature and a first frustoconical surface extending between and connecting the first convex surface to the second convex surface. The first convex surface meets the first cylindrical surface at a first sharp edge, and the first convex surface meets the first front face of the bushing at a second sharp edge.

Abstract: A bearing device includes a bearing having first and second rings, a bushing, and an electrically insulating insert overmolded between and connecting a first cylindrical surface of the bushing and a second cylindrical surface of the second ring. A convex surface connects the first cylindrical surface of the bushing to a first front face of the bushing, and the convex surface has a first radius of curvature. The convex surface meets the first cylindrical surface at a sharp edge and the convex surface meets the first front face of the bushing at a second sharp edge.

Abstract: A bearing device includes a bearing having first and second rings, a bushing and an electrically insulating insert overmolded between the bushing and the second ring. An axially facing end of the bushing includes a slot delimited by two lateral flanks and extending from the first cylindrical surface of the bushing to the second cylindrical surface of the bushing and a first protruding part of the electrically insulating insert extends into the at least one slot of the bushing, and an axially facing end of the second ring includes a slot delimited by two lateral flanks, the at least one slot of the second ring extending into the second ring from the second cylindrical surface of the second ring and a second protruding part of the electrically insulating insert extends into the at least one slot of the second ring.

Abstract: A bearing device includes a bearing having first and second mutually rotatable rings, the second ring having a first cylindrical surface and a second cylindrical surface radially spaced from the first cylindrical surface, and a bushing having an axial length and a first cylindrical surface and a second cylindrical surface radially spaced from the first cylindrical surface of the bushing. An elastically deformable member is located radially between the second ring and the bushing, and an electrically insulating insert is overmolded between and connects the first cylindrical surface of the bushing and the second cylindrical surface of the second ring and contacts the elastically deformable member. The elastically deformable member radially contacts the second ring and/or the bushing and is radially compressed relative to a free state of the elastically deformable member.

Abstract: A bearing device includes a bearing having first and second rings configured for relative rotation, a bushing and an electrically insulating insert overmolded between the second ring and the bushing. The bushing includes a radial groove at least partially aligned with a radial groove in the insulating insert, and the bearing device includes a key having a first portion mounted in the radial groove of the bushing and a second portion mounted in the radial groove of the insulating insert. Also a method of forming the bearing device.

Abstract: A bearing device includes a bearing having first and second rings and a bushing having a first cylindrical surface and a second cylindrical surface radially spaced from the first cylindrical surface. An electrically insulating insert is overmolded between and connects the first cylindrical surface of the bushing and the second cylindrical surface of the second ring. The first cylindrical surface of the bushing includes a first annular band of material projecting toward the second cylindrical surface of the second ring, the first annular band has a radial surface facing the second cylindrical surface of the second ring, the first annular bandhas an axial width less than the axial width of the bushing, and the radial surface of the first annular band is curved but does not lie on a single cylinder.

Abstract: A bearing device includes a bearing and a bushing. The bearing has first and second rings, and the bushing has a first axial end and a second axial end and an axial length from the first axial end to the second axial end and a first radial surface and a second radial surface radially spaced from the first radial surface. An electrically insulating insert is overmolded between and connects the first radial surface of the bushing and a cylindrical surface of the second ring. The first radial surface of the bushing is curved but does not lie on a single cylinder.

Abstract: A bearing device includes a bearing having first and second rings, a bushing and an electrically insulating insert overmolded between and connecting the bushing and a cylindrical surface of the second ring. The bushing is formed from two parts each having a cylindrical portion and a radial collar, and the insert is overmolded onto the cylindrical portions and the collars. Also, a surface of the first cylindrical portion and a surface of the second cylindrical portion together delimit a radially inner surface of the bushing or a radially outer surface of the bushing.

Abstract: A bearing device includes a bearing having first and second rings configured to rotate relative to each other and a bushing and an electrically insulating insert. The second ring has first and second cylindrical surfaces. The bushing has first and second cylindrical surfaces. The electrically insulating insert is overmolded between and connects the first cylindrical surface of the bushing and the second cylindrical surface of the second ring. The first cylindrical surface of the bushing includes a first annular band of material projecting toward the second cylindrical surface of the second ring, the first annular band of material has a radial surface facing the second cylindrical surface of the second ring, the first annular band of material has an axial width less than an axial width of the bushing, and the radial surface of the first annular band of material includes at least one planar portion.

Abstract: A bearing device includes a bearing having a first ring and a second ring configured to rotate relative to each other relative to a central axis, the second ring having first and second cylindrical surfaces, and a bushing having first and second axial ends and first and second radial surfaces. The bushing is conceptually divided into first and second axial halves by an imaginary plane perpendicular to the central axis and halfway between the first and second axial ends. An electrically insulating insert is overmolded between and connecting the first radial surface of the bushing and the second cylindrical surface of the second ring. The second radial surface of the bushing includes a planar portion extending from the imaginary plane toward the first and second axial ends of the bushing.

Abstract: A bearing device includes a first ring and a second ring configured to rotate relative to one another and an insulating sleeve formed from a bushing and an electrically insulating lining. The lining is overmolded on the bushing and on the second ring and connects the bushing to the second ring. The radial internal or external surface of the bushing incudes at least one helicoidal groove and the lining incudes at least one fastening rib having a shape complementary to a shape of the at least one helicoidal groove that extends into the at least one helicoidal groove. The helicoidal groove extends circumferentially at least 360 degrees around the radial internal or external surface of the bushing or the radial internal surface of the bushing.

Abstract: A grounding brush assembly includes a grounding brush, which is provided with a plurality of conductive fibers and with a support inside of which the conductive fibers are mounted, and a brush mounting plate which is secured to the support of the brush. The mounting plate includes a radial portion and at least one centering portion extending at least axially from the radial portion, which is offset radially outwardly with respect to the support and has an outer surface defining the outside diameter of the mounting plate. The mounting plate further includes at least one spacer portion extending obliquely inwardly from the centering portion and on the side opposite the radial portion.

Abstract: A grounding brush assembly includes a grounding brush including a support and a plurality of conductive fibers disposed within the support, and a brush mounting plate secured to the support of the brush. The mounting plate includes a radial portion and at least one centering portion extending at least axially from the radial portion, which is offset radially outwardly with respect to the support and has an outer surface defining the outside diameter of the mounting plate. The mounting plate includes at least one spacer tongue protruding from the radial portion on the side opposite the support.

Abstract: A grounding brush assembly includes a grounding brush provided with a plurality of conductive fibers and with a support inside of which the conductive fibers are mounted, and a brush mounting plate which is secured to the support of the brush. The assembly further includes a spacer washer supported by the mounting plate and arranged axially on the side opposite the brush in relation to the mounting plate.

Abstract: A grounding brush assembly includes a grounding brush including a support and a plurality of conductive fibers disposed within the support, and a brush mounting plate which is secured to the support of the brush. The mounting plate includes a radial portion and at least one centering portion extending at least axially from the radial portion, which is offset radially outwardly with respect to the support and has an outer surface defining the outside diameter of the mounting plate. The mounting plate further includes at least one connecting portion connecting the radial portion to the centering portion and provided with at least one oblique part extending obliquely outwardly from the radial portion and on a side opposite to the support.

Abstract: An electrical machine having a non-rotating part, a rotating part, at least one bearing supporting said rotating part and having a rotating ring and a non-rotating ring, a fiber grounding brush fixed to said non-rotating part and having a support secured to the non-rotating part and a plurality of conductive fibers having a first end secured to said support and a second free end, opposite to said first end, extending towards the rotating part, and a conductive sleeve having a base fastened to the rotating part or to the rotating ring of the bearing and a conductive layer covering at a portion of a surface of the base, the second free end of the conductive fibers of the fiber grounding brush being in contact with said conductive layer.