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Roller bearing

A technology of roller bearings and rollers, applied in the field of roller bearings, can solve problems such as increased manufacturing costs, seizure, and difficulty in penetration of lubricants and greases

Inactive Publication Date: 2005-02-02
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, as in the roller bearing described in JP-A-2002-70874, the bearing is required to strictly establish the opening angle of the inner side face of the flange portion to keep the contact position between the cylindrical roller and the flange portion constant, which increases manufacturing cost
Because the roller bearing described in JP-A-2002-70874 creates a narrow gap between the end face of the cylindrical roller and the inner face of the flange part due to the contact position between the cylindrical roller and the flange part, the lubricated Penetration of agents such as grease is difficult, causing seizure problems more likely

Method used

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Examples

Experimental program
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Embodiment Construction

[0022] see Figures 1 to 10 , preferred embodiments of the present invention are described below.

[0023] figure 1 is an axial cross-sectional view of a roller bearing according to an embodiment of the present invention. The roller bearing according to this embodiment of the invention comprises an inner ring 11 and an outer ring 12, such as figure 1 shown.

[0024] The outer diameter of the inner ring 11 is smaller than the inner diameter of the outer ring 12 . The inner ring 11 is like a ring. The rolling contact surface 13 of the rolling element is formed on the outer peripheral surface of the inner ring 11 as figure 2 shown. On the other hand, the inner diameter of the outer ring 12 is larger than the outer diameter of the inner ring 11 . The outer ring 12 is like a ring. The rolling contact surface 14 of the rolling element is formed on the inner peripheral surface of the outer ring 12 as image 3 shown. The rolling contact surfaces 13 and 14 of these rolling e...

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Abstract

A roller bearing includes an inner ring, an outer ring, a plurality of cylindrical rollers each provided between rolling contact surfaces of the inner ring and the outer ring. Each of the cylindrical rollers includes an end face having a peripheral part that is crowned. A flange portion is formed at an outer circumferential face end part of the inner ring and / or an inner circumferential face end part of the outer ring. The peripheral part is crowned in a curving shape represented by an exponential function of y=a.exp(-b.x); where a and b are constants, x is a distance from the rolling contact surface in a radial direction of the cylindrical roller, and y is a crowning fall-off amount from a central part of the end face of the cylindrical roller in an axial direction of the cylindrical roller.

Description

technical field [0001] The present invention relates to improvements in roller bearings using cylindrical rollers as rolling elements. Background technique [0002] A roller bearing using cylindrical rollers as rolling elements usually has an axial thrust load as well as a radial load, and it has a structure: a flange portion is provided at the end of the outer circumferential surface of an inner ring end and a The end of the inner peripheral surface of the outer ring, and the end face of the cylindrical roller and the inner face of the flange portion are in contact so as to bear the axial thrust load. In any case, if the cylindrical rolling elements are rolling while the rolling contact surfaces of the rolling elements of the inner and outer rings are skewed, one edge portion of the cylindrical rolling elements contacts the inner side of the flange portion, causing shortened life of the bearing. Therefore, the inner surface of the flange portion is inclined at a predetermi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/26F16C33/34F16C33/36F16C33/58
CPCF16C33/34F16C19/26F16C19/225F16C2240/50F16C2240/40F16C33/585F16C2240/34
Inventor 井手义郎市丸雅丈大浦行雄镰村有宏
Owner NSK LTD