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Rolling bearing

A technology for rolling bearings and rolling elements, applied in the field of rolling bearings, can solve problems such as film damage and lower insulation performance of bearings, and achieve the effects of reduced contact stress, easy finishing, and excellent durability

Inactive Publication Date: 2008-02-06
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, when the bearing is rotated, damage to the film due to stress concentration is likely to occur at the corner formed by the two wall surfaces 2a, 2b and the bottom surface 2c of the notch 2, which causes the insulation performance of the bearing to decrease.

Method used

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Embodiment Construction

[0032] 4A and 4B are a front view and a side sectional view of a four-point contact ball bearing 11 according to an embodiment of the present invention. In addition, FIG. 5 is a perspective view of the outer ring 13 used in the four-point contact ball bearing 11 shown in FIGS. 4A and 4B . 6A and 6B are perspective views of the keys 16 and 17 for fixing the outer ring 13 to the case.

[0033] The four-point contact ball bearing 11 includes, as shown in FIG. 4A , an inner ring 12 , an outer ring 13 , balls 14 serving as rolling elements disposed between the inner ring 12 and the outer ring 13 , and a cage 15 for keeping the distance between the balls 14 . The outer ring 13, as shown in FIG. 5, has a flat surface 13a cut by a plane connecting any point (P) on the outer diameter surface and any two points (Q, R) on the outer peripheral portion of the end surface.

[0034] When assembling the 4-point contact ball bearing 11 with the outer ring 13 as shown in FIG. Creep is thereby...

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PUM

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Abstract

A four-point contact ball bearing (11), comprising an inner ring (12), an outer ring (13), balls (14) disposed between the inner ring (12) and the outer ring (13), and a retainer (15) holding intervals between the balls (14). The outer ring (13) comprises flat surfaces (13a) cut by planes each of which connects any one point on its outer diameter surface to any two points at its end face outer peripheral part.

Description

technical field [0001] The invention relates to a rolling bearing, in particular to a rolling bearing with an insulating layer on the raceway ring. Background technique [0002] Conventionally, rolling bearings have been provided with creep prevention devices such as those described in Japanese Patent Application Publication No. 7-8913 in order to prevent creep between a housing and an outer ring during rotation. [0003] There are various types of creep prevention devices, and a rolling bearing having an outer ring as shown in FIG. 1 is generally known. [0004] According to FIG. 1 , a slit 2 is provided with a constant width from the outer diameter surface of the outer ring 1 to the end surface. In addition, FIGS. 2A and 2B show the keys 3 and 4 corresponding to the cutout 2 . [0005] When the rolling bearing with the outer ring 1 shown in Figure 1 is installed on the shaft, a recess is provided in the part of the housing corresponding to the notch 2, and the housing an...

Claims

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Application Information

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IPC IPC(8): F16C35/077F16C19/06F16C19/26F16C33/58F16C33/62
CPCF16C33/58F16C35/067F16C19/166F16C33/64F16C33/586F16C2226/50F16C2380/26
Inventor 曾根克典近藤博光平松研吾
Owner NTN CORP
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