Staking apparatus and staking method for bearing unit, manufacturing method and manufacturing apparatus of hub unit bearing, and manufacturing method of vehicle
AssigneeNsk Ltd.
InventorsNobuyuki HAGIWARA, Xuexiao ZHAO
Life of this patent
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Abstract
A plurality of press rolls (33) each having an inclined roll central axis (β) are used. Each of press rolls (33) and a hub ring (22z) are relatively rotated while pressing a roll processing surface portion (34) of each of the press rolls (33) against a plurality of locations of a tubular portion (25) of the hub ring (22z) in a circumferential direction to plastically deform the tubular portion (25).
Claims21
A staking apparatus for a bearing unit comprising:
- a reference axis;
- a base that supports a bearing unit in which a first member and a second member are combined in an axial direction;
- a first press die that has a first rotation axis;
- and
- a second press die that has a second rotation axis and is disposed apart from the first press die in a circumferential direction about the reference axis,
- wherein the first press die disposed such that the first rotation axis is inclined with respect to the reference axis and the second press die disposed such that the second rotation axis is inclined with respect to the reference axis are pressed against the bearing unit.
A staking method for a bearing unit comprising:
- a step of preparing a first press die that has a first rotation axis, and a second press die that has a second rotation axis and is disposed apart from the first press die in a circumferential direction about a reference axis;
- a step of supporting a bearing unit in which a first member and a second member are combined in an axial direction on a base;
- and
- a step of pressing the first press die disposed such that the first rotation axis is inclined with respect to the reference axis and the second press die disposed such that the second rotation axis is inclined with respect to the reference axis against the bearing unit.
A manufacturing method of a hub unit bearing which includes a shaft member and an inner ring fitted on the shaft member and in which an end surface of the inner ring on one side in an axial direction is held down with a staking portion formed by plastically deforming a tubular portion provided at an end portion of the shaft member on one side in an axial direction,
- wherein a plurality of press rolls which are disposed apart from each other in a circumferential direction about a central axis of the shaft member, each have a roll central axis inclined away from the central axis of the shaft member in a radial direction of the shaft member from one side toward the other side in the axial direction of the shaft member and an annular roll processing surface portion centered on the roll central axis, and are supported to freely rotate about the roll central axis are used, and
- wherein the method comprises a step of relatively rotating each of the press rolls and the shaft member about the central axis of the shaft member while pressing the roll processing surface portion of each of the press rolls against a plurality of locations of the tubular portion in the circumferential direction to plastically deform the tubular portion.
A manufacturing apparatus of a hub unit bearing which includes a shaft member and an inner ring fitted on the shaft member and in which an end surface of the inner ring on one side in an axial direction is held down with a staking portion formed by plastically deforming a tubular portion provided at an end portion of the shaft member on one side in an axial direction, the apparatus comprising:
- a support base;
- a plurality of press rolls;
- and a drive mechanism,
- wherein the support base is for supporting the shaft member,
- wherein the plurality of press rolls are disposed apart from each other in a circumferential direction about a central axis of the shaft member supported by the support base,
- wherein each of the press rolls has a roll central axis inclined away from the central axis of the shaft member in a radial direction of the shaft member from one side toward the other side in the axial direction of the shaft member supported by the support base and an annular roll processing surface portion centered on the roll central axis and is supported to freely rotate about the roll central axis, and
- wherein the drive mechanism has a function of relatively rotating each of the press rolls and the shaft member about the central axis of the shaft member while pressing the roll processing surface portion of each of the press rolls against a plurality of locations of the tubular portion in the circumferential direction to plastically deform the tubular portion.
Dependencies are inferred from the claim text.