Title:
DESIGNING METHOD FOR ROLLER BEARING AND CROWNING
Document Type and Number:
WIPO Patent Application WO/2008/056563
Kind Code:
A1
Abstract:
Provided are a roller bearing capable of testing a crowning easily, and a crowning designing method capable of saving time and effort for the design drastically. The optimum value (zm (μm)) of the drop quantity of the crowning at the end of the effective length of a roller (13) is determined by the following Formula (1) from the diameter (d (mm)) of the roller (13) and the effective length (L (mm)) of the roller (13): [Formula 1] 0.40(d + L) + 0.66 ≤ z
m ≤ 0.46(d + L) + 1.03...(1). It is decided whether or not the drop quantities at a plurality of positions in the direction of a generating line are within the allowance range of the following Table 1 (A). The products can be easily tested on the manufacture line.
Inventors:
FUJIWARA HIROKI (JP)
Application Number:
PCT/JP2007/071083
Publication Date:
May 15, 2008
Filing Date:
October 30, 2007
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
FUJIWARA HIROKI (JP)
FUJIWARA HIROKI (JP)
International Classes:
F16C33/58; F16C33/34
Foreign References:
| JP2006052790A | 2006-02-23 | |||
| JP2001065574A | 2001-03-16 | |||
| JP2001124089A | 2001-05-08 | |||
| JP2004353744A | 2004-12-16 | |||
| JP2006052790A | 2006-02-23 | |||
| JP3731401B2 | 2006-01-05 |
Other References:
LUNDBERG, G, ELASTIC CONTACT BETWEEN TWO SEMI-INFINITE BODIES, FORSCHUNG AUF DEN GEBIETE DES INGENIEURWESEN, vol. 5, 1939, pages 201 - 211
JOHNS, RM.; GOHAR, R: "Roller bearing under radial and eccentric loads", TRIBOLOGY INTERNATIONAL, vol. 14, 1981, pages 131 - 136, XP008128280, DOI: doi:10.1016/0301-679X(81)90058-X
JOHNS, P.M.; GOHAR, R., ROLLER BEARING UNDER RADIAL AND ECCENTRIC LOADS, TRIBOLOGY INTERNATIONAL, vol. 14, 1981, pages 131 - 136
JOHNS, RM.; GOHAR, R: "Roller bearing under radial and eccentric loads", TRIBOLOGY INTERNATIONAL, vol. 14, 1981, pages 131 - 136, XP008128280, DOI: doi:10.1016/0301-679X(81)90058-X
JOHNS, P.M.; GOHAR, R., ROLLER BEARING UNDER RADIAL AND ECCENTRIC LOADS, TRIBOLOGY INTERNATIONAL, vol. 14, 1981, pages 131 - 136
Attorney, Agent or Firm:
TANAKA, Hideyoshi et al. (15-26 Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, JP)
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