In the cage, on opposing edges of an outer circumferential opening of each of some of cage pockets, guiding faces for limiting the inward displacement in the radial direction of each of balls for a pitch circle diameter are provided; and on opposing edges of the inner circumferential opening of each
In the cage, on opposing edges of an outer circumferential opening of each of some of cage pockets, guiding faces for limiting the inward displacement in the radial direction of each of balls for a pitch circle diameter are provided; and on opposing edges of the inner circumferential opening of each of remaining cage pockets, guiding faces for limiting the outward displacement in the radial direction of each of the balls for the pitch circle diameter are provided, thereby making a ball guide.
대표청구항▼
1. A cage for a ball bearing, comprising: a synthetic resin in which cage pockets for accommodating balls, respectively, formed as through holes penetrating through a radial direction are arranged on a circumference of said cage, and being formed by connecting a plurality of curved segments each of
1. A cage for a ball bearing, comprising: a synthetic resin in which cage pockets for accommodating balls, respectively, formed as through holes penetrating through a radial direction are arranged on a circumference of said cage, and being formed by connecting a plurality of curved segments each of which comprises a curved shape in a circumferential direction;a pair of outer circumferential guiding convexes which protrude outwardly in the radial direction from the curved segments are provided on opposing edges of outer circumferential openings of certain cage pockets, and outer circumferential guiding faces for limiting radially inward displacement of the curved segments with respect to a pitch circle diameter of said balls are provided on said pair of outer circumferential guiding convexes; anda pair of inner circumferential guiding convexes which protrude inwardly in the radial direction from the curved segments are provided on opposing edges of inner circumferential openings of other cage pockets, and inner circumferential guiding faces for limiting a radially outward displacement of the curved segments with respect to the pitch circle diameter of said balls are provided on said pair of inner circumferential guiding convexes,wherein the outer circumferential guiding faces of said certain cage pockets and the inner circumferential guiding faces of said other cage pockets are alternately provided on each adjacent pair of said cage pockets along the circumference,wherein a pair of opposite inner circumferential stoppers for stopping come-off of said balls are provided on opposing sides in a circumferential direction in an inner circumferential opening of each of said certain cage pockets which has the outer circumferential guiding faces on the outer circumferential opening, and an interval between said pair of opposite inner circumferential stoppers becomes gradually narrow inwardly in the radial direction of the cage to stop come-off of the ball toward an inner circumferential side, said opposite inner circumferential stoppers including a surface facing the pocket and a surface opposite to the pocket in the circumferential direction both of which approach the pocket in the circumferential direction as the surface facing the pocket and the surface opposite to the pocket project inwardly in the radial direction from the curved segments, a surface facing the pocket in each of the opposite inner circumferential stoppers projects toward the pocket when the surface goes to a radial inner side, and a chamfered flat surface that is apart from a surface of the ball in the pocket is located on the radial inner side of the surface facing the pocket,wherein a pair of opposite outer circumferential stoppers for stopping come-off of said balls are provided on opposing sides in the circumferential direction in an outer circumferential opening of each of the other cage pockets which has the inner circumferential guiding faces on the inner circumferential opening, and an interval between the pair of opposite outer circumferential stoppers becomes gradually narrow outwardly in the radial direction of the cage to stop come-off of the ball toward an outer circumferential side, said opposite outer circumferential stoppers having a surface facing the pocket and a surface opposite to the pocket in the circumferential direction both of which approach the pocket in the circumferential direction as the surface facing the pocket and the surface opposite to the pocket project outwardly in the radial direction from the curved segments, a surface facing the pocket in each of the opposite outer circumferential stoppers projects toward the pocket when the surface goes to a radial outer side, and a chamfered flat surface that is apart from a surface of the ball in the pocket is located on the radial outer side of the surface facing the pocket,wherein the outer circumferential guiding convexes and the outer circumferential stoppers which are adjacent each other in the circumferential direction protrude from an outer circumferential surface of the curved segments independently,wherein the inner circumferential guiding convexes and the inner circumferential stoppers which are adjacent each other in the circumferential direction protrude from an inner circumferential surface of the curved segments independently;wherein a length in the circumferential direction of the outer circumferential guiding convex is longer than that of the outer circumferential stopper, a maximum height in the radial direction from the outer circumferential surface of the curved segment of the outer circumferential guiding convex is higher than that of the outer circumferential stopper, and an axial length of the outer circumferential guiding convex is longer than that of the outer circumferential stopper,wherein a length in the circumferential direction of the inner circumferential guiding convex is longer than that of the inner circumferential stopper, a maximum height in the radial direction from the inner circumferential surface of the curved segment of the inner circumferential guiding convex is higher than that of the inner circumferential stopper, and an axial length of the inner circumferential guiding convex is longer than that of the inner circumferential stopper, andwherein a segment of the outer circumferential surface of the curved segment between the outer circumferential guiding convexes and the outer circumferential stoppers which are adjacent each other in the circumferential direction does not overlap a segment of the inner circumferential surface of the curved segment between the inner circumferential guiding convexes and the inner circumferential stoppers which are adjacent each other, in the circumferential direction of the cage. 2. A cage for a ball bearing according to claim 1, wherein a circumference of said cage is separated at one position such that a securing portion at one end of said cage and an engaging portion at another end of said cage are engageable and detachable with respect to each other. 3. A cage for a ball bearing according to claim 1, wherein said outer circumferential guiding face includes a planar face at a center part in an axial direction of said cage body and partial conical faces on both axial sides of said center part, and wherein said inner circumferential guiding face includes a planar face at a center part in an axial direction of said cage body and partial conical faces on both axial sides of said center part. 4. A cage for a ball bearing according to claim 1, wherein each of the cage pockets for accommodating balls is a cylindrical through hole. 5. A ball bearing comprising the cage according to claim 1, further comprising a plurality of balls, an outer ring and an inner ring. 6. A cage for a ball bearing according to claim 1, wherein the outer circumferential guiding faces are only provided on said certain cage pockets and the inner circumferential guiding faces are only provided on said other cage pockets. 7. A cage for a ball bearing according to claim 3, wherein a slope narrowing the plurality of outer circumferential openings is provided on a plurality of edges of the outer circumferential openings on which the outer circumferential guiding faces are provided, adjacent to the outer circumferential guiding faces in the circumferential direction, in said plurality of cage pockets. 8. A cage for a ball bearing, comprising: a synthetic resin in which cage pockets for accommodating balls, respectively, formed as through holes penetrating through a radial direction are arranged on a circumference of said cage, and being formed by connecting a plurality of curved segments each of which comprises a curved shape in a circumferential direction;a pair of outer circumferential guiding convexes which protrude outwardly in the radial direction from the curved segments are provided on opposing edges of outer circumferential openings of certain cage pockets, and outer circumferential guiding faces for limiting radially inward displacement of the curved segments with respect to a pitch circle diameter of said balls are provided on said pair of outer circumferential guiding convexes; anda pair of inner circumferential guiding convexes which protrude inwardly in the radial direction from the curved segments are provided on opposing edges of inner circumferential openings of other cage pockets, and inner circumferential guiding faces for limiting a radially outward displacement of the curved segments with respect to the pitch circle diameter of said balls are provided on said pair of inner circumferential guiding convexes, whereby a ball guide is formed so as to suppress or prevent interference of the cage with a bearing ring member,wherein the outer circumferential guiding faces of said certain cage pockets and the inner circumferential guiding faces of said other cage pockets are alternately provided on each adjacent pair of said cage pockets along the circumference,wherein a pair of opposite inner circumferential stoppers for stopping come-off of said balls are provided on opposing sides in a circumferential direction in an inner circumferential opening of each of said certain cage pockets which has the outer circumferential guiding faces on the outer circumferential opening, and an interval between said pair of opposite inner circumferential stoppers becomes gradually narrow inwardly in the radial direction of the cage to stop come-off of the ball toward an inner circumferential side, said opposite inner circumferential stoppers including a surface facing the pocket and a surface opposite to the pocket in the circumferential direction both of which approach the pocket in the circumferential direction as the surface facing the pocket and the surface opposite to the pocket project inwardly in the radial direction from the curved segments, a surface facing the pocket in each of the opposite inner circumferential stoppers projects toward the pocket when the surface goes to a radial inner side, and a chamfered flat surface that is apart from a surface of the ball in the pocket is located on the radial inner side of the surface facing the pocket,wherein a pair of opposite outer circumferential stoppers for stopping come-off of said balls are provided on opposing sides in the circumferential direction in an outer circumferential opening of each of the other cage pockets which has the inner circumferential guiding faces on the inner circumferential opening, and an interval between the pair of opposite outer circumferential stoppers becomes gradually narrow outwardly in the radial direction of the cage to stop come-off of the ball toward an outer circumferential side, said opposite outer circumferential stoppers having a surface facing the pocket and a surface opposite to the pocket in the circumferential direction both of which approach the pocket in the circumferential direction as the surface facing the pocket and the surface opposite to the pocket project outwardly in the radial direction from the curved segments, a surface facing the pocket in each of the opposite outer circumferential stoppers projects toward the pocket when the surface goes to a radial outer side, and a chamfered flat surface that is apart from a surface of the ball in the pocket is located on the radial outer side of the surface facing the pocket,wherein the outer circumferential guiding convexes and the outer circumferential stoppers which are adjacent each other in the circumferential direction protrude from an outer circumferential surface of the curved segments independently,wherein the inner circumferential guiding convexes and the inner circumferential stoppers which are adjacent each other in the circumferential direction protrude from an inner circumferential surface of the curved segments independently,wherein a length in the circumferential direction of the outer circumferential guiding convex is longer than that of the outer circumferential stopper, a maximum height in the radial direction from the outer circumferential surface of the curved segment of the outer circumferential guiding convex is higher than that of the outer circumferential stopper, and an axial length of the outer circumferential guiding convex is longer than that of the outer circumferential stopper,wherein a length in the circumferential direction of the inner circumferential guiding convex is longer than that of the inner circumferential stopper, a maximum height in the radial direction from the inner circumferential surface of the curved segment of the inner circumferential guiding convex is higher than that of the inner circumferential stopper, and an axial length of the inner circumferential guiding convex is longer than that of the inner circumferential stopper, andwherein a segment of the outer circumferential surface of the curved segment between the outer circumferential guiding convexes and the outer circumferential stoppers which are adjacent each other in the circumferential direction does not overlap a segment of the inner circumferential surface of the curved segment between the inner circumferential guiding convexes and the inner circumferential stoppers which are adjacent each other, in the circumferential direction of the cage. 9. A cage for a ball bearing according to claim 8, wherein a circumference of said cage is separated at one position such that a securing portion at one end of said cage and an engaging portion at another end of said cage are engageable and detachable with respect to each other. 10. A cage for a ball bearing according to claim 8, wherein said outer circumferential guiding face includes a planar face at a center part in an axial direction of said cage body and partial conical faces on both axial sides of said center part, and wherein said inner circumferential guiding face includes a planar face at a center part in an axial direction of said cage body and partial conical faces on both axial sides of said center part. 11. A cage for a ball bearing according to claim 8, wherein each of the cage pockets for accommodating balls is a cylindrical through hole. 12. A ball bearing comprising the cage according to claim 8, further comprising a plurality of balls, an outer ring and an inner ring. 13. A cage for a ball bearing according to claim 8, wherein the outer circumferential guiding faces are only provided on said certain cage pockets and the inner circumferential guiding faces are only provided on said other cage pockets. 14. A cage for a ball bearing according to claim 10, wherein a slope narrowing the plurality of outer circumferential openings are provided on a plurality of edges of the outer circumferential openings on which the outer circumferential guiding faces are provided, adjacent to the outer circumferential guiding faces in the circumferential direction, in said plurality of cage pockets. 15. A cage for a ball bearing according to claim 1, wherein the pair of opposite outer circumferential stoppers are formed such that balls may be inserted therebetween. 16. A cage for a ball bearing according to claim 1, wherein the pair of opposite inner circumferential stoppers are formed such that balls may be inserted therebetween. 17. A cage for a ball bearing according to claim 1, wherein a thickness of the pair of inner circumferential guiding convexes, in the circumferential direction, increases as the pair of inner circumferential guiding convexes project radially inward. 18. A cage for a ball bearing according to claim 1, wherein a thickness of the pair of outer circumferential guiding convexes, in the circumferential direction, increases as the pair of outer circumferential guiding convexes project radially outward. 19. A cage for a ball bearing according to claim 1, wherein the outer circumferential guiding convex, except for a part of the outer circumferential guiding convex facing the pocket, is surrounded by the outer circumferential surface of the curved segment, wherein the outer circumferential stopper, except for a part of the outer circumferential stopper facing the pocket, is surrounded by the outer circumferential surface of the curved segment,wherein the inner circumferential guiding convex, except for a part of the inner circumferential guiding convex facing the pocket, is surrounded by the inner circumferential surface of the curved segment, andwherein the inner circumferential stopper, except for a part of the inner circumferential stopper facing the pocket, is surrounded by the inner circumferential surface of the curved segment.
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Ito Yukifusa (Gifu JPX), Angular ball bearing method for assembling the same.
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