Rolling bearing apparatus
AssigneeNsk Ltd.
InventorShogo Mochizuki
Life of this patent
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Abstract
In a creep preventing rolling bearing apparatus 21, an inner ring 12 is provided with a first key groove 13 opened at an inner peripheral face 12i in an axial end portion 12t. The first key groove 13 is provided so as to have a predetermined length L in the axial direction from the axial end portion 12t at a position having a certain depth D from an outer peripheral face 12o in a radial direction. A rotation shaft 17 is provided with a second key groove 13′ on an outer peripheral face 17o along an axial direction. The first key groove 13 and the second key groove 13′ are aligned and a key 18 is inserted, whereby the first key groove 13 and the second key groove 13′ are fixed at the same time.
Claims8
A rolling bearing apparatus comprising:
- a rolling bearing comprising an outer ring, an inner ring having a first key groove formed along an axial direction on an inner peripheral face of an axial end portion of the inner ring, and a plurality of rollers held between the inner ring and the outer ring in a rollable manner;
- a rotation shaft having a second key groove on an outer peripheral face thereof on which the rolling bearing is incorporated;
- a key inserted into the first key groove and the second key groove, and
- a seal provided between the inner and outer rings at the axial end portion of the inner ring;
- wherein the first key groove is opened at the inner peripheral face of the inner ring in the axial end portion of the inner ring, and
- wherein the first key groove is formed so as to have a predetermined length in the axial direction from the axial end portion of the inner ring at a position having a certain depth from an outer peripheral face of the inner ring in a radial direction,
- wherein the key is in a shape of a quadrilateral prism or cylinder.
A rolling bearing apparatus for supporting a roll neck of a rolling mill, the apparatus comprising:
- a rolling bearing comprising:
- an outer ring,
- an inner ring comprising an inner peripheral face, an outer peripheral face, and a first key groove formed on the inner peripheral face at an axial-most end portion of the inner ring,
- a plurality of rollers between the inner ring and the outer peripheral face;
- a rotation shaft having a second key groove on an outer peripheral face thereof on which the rolling bearing is incorporated;
- and
- a key configured to be inserted into the first key groove and the second key groove,
- wherein a surface of the first key groove extends in the axial direction from the axial-most end portion of the inner ring to a position short of the rollers, and
- wherein the first key groove is opened at the inner peripheral face of the inner ring in an axial-most end portion of the inner ring.
A rolling bearing apparatus comprising:
- a rolling bearing comprising an outer ring, an inner ring having a first key groove formed along an axial direction on an inner peripheral face of an axial end portion of the inner ring, and a plurality of rollers held between the inner ring and the outer ring in a rollable manner;
- a rotation shaft having a second key groove on an outer peripheral face thereof on which the rolling bearing is incorporated;
- a key inserted into the first key groove and the second key groove, and
- a seal provided between the inner and outer rings at the axial end portion of the inner ring;
- wherein the first key groove is opened at the inner peripheral face of the inner ring in the axial end portion of the inner ring,
- wherein the first key groove is formed so as to have a predetermined length in the axial direction from the axial end portion of the inner ring at a position having a certain depth from an outer peripheral face of the inner ring in a radial direction, and
- wherein the second key groove of the rotation shaft extends outward beyond the axial end portion of the inner ring.
Dependencies are inferred from the claim text.