Cage and ball bearing
AssigneeNtn Corporation
InventorGoro NAKAO
Life of this patent
Estimating the term…
Abstract
A cage is provided which is less likely to be deformed by a centrifugal force, and in which the strength of a weld is less likely to decrease. Each horn portion includes a base wall axially connected to a ring portion, and located between pockets; and a pair of claws separated from each other. The pair of claws each has a pocket inner surface facing the pocket; and an opposed surface (14) on the side opposite from the pocket inner surface. The base wall includes a pair of connection portions axially connecting the respective claws to the ring portion; and an intermediate portion circumferentially connecting the connection portions to each other. A weld is disposed in a resin area consisting of one of the claws, one of the connection portions, and a circumferential section of the ring portion.
Claims15
A cage comprising:
- a ring portion extending in a circular annular shape;
- and
- a plurality of horn portions disposed at uniform intervals in a circumferential direction, and protruding from the ring portion toward one axial side, the ring portion and the plurality of horn portions being integrally formed by injection molding of a synthetic resin,
- wherein rolling elements are received, respectively, in pockets of the cage that are each surrounded from three sides by the ring portion and a corresponding circumferentially adjacent pair of the horn portions,
- wherein the ring portion has pocket bottoms defining deepest portions of the respective pockets on the other axial side,
- wherein each of the horn portions comprises:
- a base wall axially connected to the ring portion, and located between, and circumferentially connected to, a corresponding circumferentially adjacent pair of the pockets;
- and
- a pair of claws circumferentially separated from each other, and protruding from the base wall toward the one axial side,
- the pair of claws each having:
- a pocket inner surface facing a corresponding one of the pockets;
- and
- an opposed surface located on a side circumferentially opposite from the pocket inner surface,
- the base wall comprising:
- a pair of connection portions axially connecting the respective claws to the ring portion;
- and
- an intermediate portion circumferentially connecting the connection portions to each other, and
- wherein a weld formed during the injection molding is disposed in a resin area consisting of one of the claws, one of the connection portions axially connected to the one of the claws, and a circumferential section of the ring portion axially connected to the one of the connection portions.
Dependencies are inferred from the claim text.