Title:
BEARING DEVICE FOR VEHICLE WHEEL
Document Type and Number:
WIPO Patent Application WO/2017/010555
Kind Code:
A1
Abstract:
Provided is a bearing device for a vehicle wheel in which the bearing device for a vehicle wheel is reduced in weight, face deflection accuracy of a vehicle-wheel-mounted flange is increased to minimize the occurrence of brake judder, and reliability is improved. A bearing device for a vehicle wheel in which hub bolts 6a for fastening a vehicle wheel are embedded at equidistant circumferential intervals in a vehicle-wheel-mounted flange 6, wherein an annular groove 7a encompassing the hub bolts 6a is formed in an outer side surface 7 of the vehicle-wheel-mounted flange 6, the side surface 7 of the vehicle-wheel-mounted flange 6 is a machined surface that is machined after the hub bolts 6a have been press-fitted, circular holes 13 for weight reduction are formed between the hub bolts 6a of the vehicle-wheel-mounted flange 6, a circumcircle diameter A of the circular holes 13 is set greater than the outside diameter B of the annular groove 7a, and muddy water, etc., infiltrating the circular holes 13 is therefore easily discharged from the circular holes 13 without accumulating between the outer side surface 7 of the vehicle-wheel-mounted flange 6 and a side surface of a brake disk.
Inventors:
NAKATSUJI YUTA (JP)
Application Number:
PCT/JP2016/070914
Publication Date:
January 19, 2017
Filing Date:
July 14, 2016
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
B60B27/00; B60B35/02; F16C19/18; F16C33/58
Foreign References:
| JP2010089664A | 2010-04-22 | |||
| JP2005335700A | 2005-12-08 | |||
| JP2014031136A | 2014-02-20 |
Attorney, Agent or Firm:
KOSHIKAWA, Takao (JP)
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