Bearing device with integrated electrical insulation, notably for electrical machine or electric motor, and associated methods of manufacture
OwnerBenoit ARNAULT, Mickael CHOLLET +1inventors
InventorsBenoit ARNAULT, Mickael CHOLLET, Anthony SIMONIN
Life of this patent
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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.
Claims16
A bearing device comprising:
- a bearing including a first ring and a second ring configured to rotate relative to each other, the second ring having a first cylindrical surface and a second cylindrical surface radially spaced from the first cylindrical surface,
- 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 electrically insulating insert overmolded between and connecting the first cylindrical surface of the bushing and the second cylindrical surface of the second ring, and
- a key,
- wherein the bushing includes a radial groove at least partially aligned with a radial groove in the insulating insert, and
- wherein a first portion of the key is mounted in the radial groove of the bushing and a second portion of the key is mounted in the radial groove of the insulating insert.
A method comprising:
- mounting a bushing having a radial groove in an axially facing surface and a bearing ring in a mold,
- overmolding an electrically insulating insert between the bushing and the bearing ring to connect the bushing to the bearing ring such that the electrically insulating insert does not completely fill the groove of the bushing and such that the electrically insulating insert has a groove at least partially aligned with the groove of the bushing and
- after the overmolding, inserting a key into the groove of the bushing and into the groove of the insulating insert.
A method comprising,
- mounting a bushing having a radial groove in an axially facing surface and a bearing ring in a mold,
- inserting a key in the radial groove such that a first portion of the key extends radially from the radial groove,
- overmolding an electrically insulating insert between the bushing and the bearing ring to secure the key to the bushing and the bearing ring and to secure the bushing and the bearing ring to one another.
Dependencies are inferred from the claim text.