Retainer

Abstract

The present invention provides a cage in which the occurrence of cage noise can be suppressed. A cage according to the present disclosure comprises: a body that forms a ring shape; a plurality of pockets that are provided along the circumferential direction and run through the body in the radial direction; and cage surfaces, each of which faces a ball and forms a C-shape as viewed from the radial direction. Each cage surface includes: a C-shaped outer circumferential angled portion; a C-shaped inner circumferential angled portion; a first cage surface that is disposed in a first rotation direction relative to the ball; and a second cage surface that is disposed in a second rotation direction relative to the ball. The first cage surface extends along a first spherical surface defined by rotating a first virtual circle about a virtual line passing through the axial center and the ball center. The second cage surface extends along a second spherical surface defined by rotating a second virtual circle about the virtual line. The first virtual circle and the second virtual circle are true circles and have radii that are greater than the ball radius. The center of the first virtual circle and the center of the second virtual circle are disposed more radially outward than a virtual plane that includes the ball center and is perpendicular to the virtual line.

Claims

1. The bearing device is positioned between the inner and outer rings, and has a main body that forms an annular shape around the axis of the inner ring, The main body portion penetrates radially and has multiple pockets provided in the circumferential direction, A retaining surface facing the ball placed in the aforementioned pocket, forming a C-shape when viewed radially, Equipped with, The retaining surface is The C-shaped outer corner portion where the holding surface and the outer circumferential surface of the main body intersect, The C-shaped inner circumferential corner portion where the retaining surface and the inner circumferential surface of the main body intersect, A first retaining surface is positioned relative to the ball in a first rotational direction about the axis, The ball is provided with a second retaining surface positioned in a second rotational direction opposite to the first rotational direction, It has, The first retaining surface extends along a first spherical surface formed by rotating a first virtual circle around a virtual line passing through the axis and the center of the ball, The second retaining surface extends along a second spherical surface formed by rotating a second virtual circle around the virtual line, The first virtual circle and the second virtual circle are ellipses, The centers of the first and second virtual circles are perpendicular to the virtual line and are located radially outward from the virtual plane containing the center of the ball. retainer.

2. The outer peripheral corner is located radially outward from the outer peripheral contact point that contacts the retaining surface when the ball moves radially outward relative to it. The inner circumferential angle portion is located radially inward from the inner circumferential contact point that contacts the retaining surface when the ball moves radially inward relative to it. The retainer according to claim 1.

3. The center of the first virtual circle is positioned closer to the second holding surface than the virtual line. The center of the second virtual circle is positioned closer to the first holding surface than the virtual line. The retainer according to claim 1 or claim 2.

4. The center of the first virtual circle and the center of the second virtual circle coincide on the virtual line. The retainer according to claim 1 or claim 2.

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