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Patent Searching and Data


Title:
BEARING DEVICE FOR WHEELS
Document Type and Number:
WIPO Patent Application WO/2019/189421
Kind Code:
A1
Abstract:
Provided is a bearing device for wheels, which has an increased number of balls and in which the easiness of mounting the balls is increased. A bearing device 1 for wheels is provided with: an outer ring 2 provided with outer raceway surfaces 2c, 2d; an inner member having a hub ring 3 and an inner ring 4 and having double-row inner raceway surfaces 3c, 4a formed thereon; balls 8 contained in a rollable manner between the raceway surfaces of the outer ring 2 and of the inner member; and a retainer 7 which is provided with a base 7a and with columns 7b arranged at fixed intervals in a circumferential direction and extending in the axial direction thereof from the base 7a, and has pockets Pt each formed surrounded by adjacent columns 7b and a base 7a which is located between the adjacent columns 7b, the pockets Pt retaining the balls 8. Each of the columns 7b of the retainer 7 is provided with latch sections 7e protruding toward adjacent columns 7b and with cutouts. The front ends of the latches 7e are located within an annular range having a radial width R1 defined between the outer peripheral circle of a ball 8 and a reference imaginary circle C1 having a diameter D1 centered on the center of the ball 8.

Inventors:
KOIZUMI Souta (1578 Higashikaizuka, Iwata-sh, Shizuoka 10, 〒4388510, JP)
Application Number:
JP2019/013290
Publication Date:
October 03, 2019
Filing Date:
March 27, 2019
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
F16C33/41; B60B35/18; F16C19/18
Foreign References:
US4702627A1987-10-27
JP2005180630A2005-07-07
JP2008261483A2008-10-30
JP2007239854A2007-09-20
JP2002098151A2002-04-05
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (Twin 21 MID Tower 34th Floor, 1-61 Shiromi 2-chome, Chuo-ku, Osaka-sh, Osaka 34, 〒5406134, JP)
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