Method for manufacturing hub unit bearing, swaging device, and method for manufacturing vehicle
AssigneeNsk Ltd.
InventorsNobuyuki Hagiwara, Reiji Hirasaki
Life of this patent
Estimating the term…
Abstract
To realize a method for manufacturing a hub unit bearing capable of increasing the processing efficiency of a staking portion. An axial inner end portion of a hub ring 22 is processed into a staking portion 26 by rotating a die 31 around a reference axis C in a state in which the die 31 having a rotation axis α inclined with respect to the reference axis C is pressed against the axial inner end portion of the hub ring 22 under a condition that the hub ring 22 is disposed so that a center axis of the hub ring 22 is coaxial or parallel to the reference axis C and the hub ring 22 is supported to be radially movable.
Claims8
A method for manufacturing a hub unit bearing, the hub unit bearing including an outer ring, a hub, and a rolling element disposed between the outer ring and the hub, the hub including a first hub element, a second hub element, and a staking portion connecting the first hub element and the second hub element to each other, the manufacturing method comprising the steps of:
- preparing a holder;
- holding the second hub element, which is combined with the first hub element along a reference axis, on the holder, and
- forming the staking portion by using a die in a state in which (i) the second hub element is movable with respect to the holder in a direction orthogonal to the reference axis, wherein
- the second hub element includes a shaft portion provided with a track for the rolling element and a pilot portion provided at a shaft end portion of the shaft portion,
- the holder includes an insertion hole having an inner diameter larger than an outer diameter of the pilot portion of the second hub element,
- the step of holding the second hub element includes:
- holding the second hub element, which is combined with the first hub element along the reference axis, on the holder in a state in which the pilot portion of the second hub element is inserted into the insertion hole of the holder;
- aligning a center axis of the second hub element to the reference axis with fitting an alignment jig to the pilot portion of the second hub element;
- and
- removing the alignment jig from the aligned second hub element, and
- the step of forming the staking portion includes forming the staking portion by using the die in a state in which the second hub element from which the alignment jig is removed is movable with respect to the holder in the direction orthogonal to the reference axis.
Dependencies are inferred from the claim text.