VEHICLE WHEEL BEARING DEVICE

WIPO Patent Application WO/2023/013508

A1

Provided is a vehicle wheel bearing device with which the ease of filling an injection molding of a holder with a resin is improved, and with which any increase in bearing torque can be minimized.　A vehicle wheel bearing device 1 comprising a plastic holder 7 which has a ring portion 7a formed in an annular shape and a plurality of column parts 7b axially extending from the ring portion 7a at regular intervals in the circumferential direction, and in which pockets Pt having curved surfaces 7e following the outer peripheral surfaces of rolling elements (balls 8) are formed by adjacent column parts 7b and the annular portion 7a, the rolling elements (8) being held in the pockets, and the column parts 7b being formed branching into inner-diameter sides and outer-diameter sides due to cut-away parts 7k, wherein, starting from an end part 7p of the ring portion 7a on the side axially opposite of the column parts 7b, the axial length a of each column part 7c on the inner-diameter side is less than the axial length b up to a center position P1 of the rolling element (8), and is greater than the axial length c up to an end part position P2 on the ring-portion 7a side of the cut-away part 7k.

NAKA DAISUKE (JP)
KATSUBE SHOUJI (JP)

PCT/JP2022/029031

February 09, 2023

July 27, 2022

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NTN TOYO BEARING CO LTD (JP)

F16C33/41; F16C19/18

JP2017026076A	2017-02-02
JP2011202710A	2011-10-13
JP2019173831A	2019-10-10
JP2012167683A	2012-09-06
US5387041A	1995-02-07

YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)

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