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Cage with rotation symmetrical depression

A technology of rotational symmetry and cage, applied in the field of cage, can solve the problems of complex mold shape, manufacturing steps of cutting, grinding and other complex machining, expensive mold manufacturing, etc.

Inactive Publication Date: 2003-12-17
MINEBEA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, since the pocket inner surface 4A described in the above prior art reference has a polyhedral shape, the shape of the mold for forming the cage is complicated.
Because for complex shapes, manufacturing steps such as cutting, grinding and other machining will be more complicated, therefore, the mold will be more expensive to manufacture

Method used

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  • Cage with rotation symmetrical depression
  • Cage with rotation symmetrical depression
  • Cage with rotation symmetrical depression

Examples

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Embodiment Construction

[0025] figure 2 and 3 A "crown" shaped cage 4 for holding a plurality of balls (not shown) is shown. Balls are rolling elements that fit into races formed between outer and inner rings of a radial ball bearing (not shown). A plurality of dimples 5 are arranged at equal intervals along the circumference of the cage 4 , and each dimple 5 holds a ball. The number of pockets 5 varies with the number of balls in the bearing.

[0026] Each pocket 5 has a pair of corner portions 7 protruding from one edge of the ring member 6 . Each pocket 5 opens in three directions—inner and outer peripheral directions of the ring member 6 and one edge direction of the ring member 6 . The inner surface 8 of the pocket 5 is spherical (ie concave surface shape) corresponding to the surface of the ball. When the ball is pressed into the opening at one edge of the pocket 5, the corner portion 7 is stretched, thereby allowing the ball to fit into the pocket 5 and rotate therein.

[0027] figure...

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PUM

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Abstract

A retainer having an annular body with a plurality of pockets. Each pocket has a pair of corner portions that form an opening. The pockets have a spherical inside surface and a pair of tapered surfaces. Alternatively, the pockets can have a spherical inside surface and at least two pairs of tapered surfaces. The geometry of the pockets including the corner portions has rotational symmetry. The retainer improves lubricant retention, and reduces vibration, noise and non-repeating run out.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority from Japanese Patent Application No. 2002-157430, filed May 30, 2002, entitled Cage". technical field [0003] The invention relates to a cage for retaining rolling elements within a ball bearing race. In particular, the invention relates to a cage having rotationally symmetrical pockets and for which a mold can be easily produced. Background technique [0004] In bearings using rolling elements, disengagement of the rolling elements and friction due to contact between adjacent rolling elements are prevented by using a cage. The use of cages enables the rolling elements to rotate within the bearing races while keeping them separated by a specified fixed distance. [0005] Figure 10 A common cage 1 used in ball bearings is shown. The cage 1 is an annular part with a plurality of pockets 3 (in Figure 10 Only one pocket is shown in ), these pockets 3 are fitted with bal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/38F16C33/41
CPCF16C33/418F16C33/416
Inventor 山本卓也
Owner MINEBEA CO LTD