Resin cage and roller bearing
A cage and resin technology, used in rolling contact bearings, bearings, bearing components, etc., to solve problems such as the inability to stably hold the rollers
Inactive Publication Date: 2014-03-26
JTEKT CORP
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] That is, like a metal cage, the column portion of the resin cage is formed with a slope portion whose tip becomes wider as it goes radially inward. If only the slope portion is used to guide the rollers, the following results are found: Situation: Due to the elasticity of the resin cage, the roller may sneak into the cage around the periphery in the direction in which the roller travel direction coincides with the vertical downward direction, and thus the roller cannot be held stably.
Method used
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[0016] Hereinafter, the present invention will be described in detail with reference to the drawings.
[0017] figure 1 It is an axial sectional view of a tapered roller bearing which is an embodiment of the roller bearing of the present invention.
[0018] Such as figure 1 As shown, this tapered roller bearing includes an outer ring 1 , an inner ring 2 , a plurality of tapered rollers 3 , and a cage 4 made of resin. The outer ring 1 has an inner peripheral tapered raceway surface 5 . On the other hand, the inner ring 2 has an outer peripheral tapered raceway surface 7 . The inner ring 2 has a small flange surface 10 at the small-diameter end of the outer peripheral tapered raceway surface 7 and a large flange surface 11 at the large-diameter end.
[0019] The plurality of tapered rollers 3 are held by the cage 4 and are located between the inner tapered raceway surface 5 of the outer ring 1 and the outer tapered raceway surface 7 of the inner ring 2 at intervals in the ci...
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The invention provides a resin cage and a roller bearing. In a section of a cage taken along a radial direction, each of tapered roller guide surfaces of bar portions, which face pockets, includes a straight first portion (50); a curved second portion (51) having a curvature radius that is equal to or larger than 1.01 times and equal to or smaller than 1.03 times a radius of a tapered roller in the section; and a straight third portion (52). In the section, extension lines of the two first portions that are opposed to each other across the pocket in the circumferential direction form a vertex angle that is equal to or larger than 35 degrees, and equal to or smaller than 55 degrees. In the section, a distance between the two third portions that are opposed to each other across the pocket in the circumferential direction is larger than a diameter of the tapered roller in the section.
Description
technical field [0001] The present invention relates to a resin cage and a roller bearing. Background technique [0002] Conventionally, there is a tapered roller bearing described in JP 2010-091007 A as a roller bearing. This tapered roller bearing includes a metal cage including: a small-diameter annular portion; a large-diameter annular portion having a larger diameter than the small-diameter annular portion; and a plurality of column portions. The plurality of column portions are positioned at intervals from each other in the circumferential direction of the small-diameter annular portion, and each of the column portions connects the small-diameter annular portion and the large-diameter annular portion. [0003] There are pockets in which the tapered rollers are arranged between the adjacent column portions in the circumferential direction. Some of the roller guide surfaces facing the pockets of the plurality of column portions have slope portions whose ends widen as t...
Claims
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IPC IPC(8): F16C33/46
CPCF16C19/364F16C33/4635F16C33/4676F16C2240/70F16C2326/10F16C2360/31F16C2361/61
Inventor 福田晋治
Owner JTEKT CORP