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Cage for rolling bearing

  • US 20090060407A1
  • Filed: 08/29/2008
  • Published: 03/05/2009
  • Est. Priority Date: 08/31/2007
  • Status: Abandoned Application
First Claim
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1. A cage for a bearing comprising:

  • a holding portion disposed in an annular space between a inner ring and an outer ring that holds a plurality of rolling elements between the inner ring and the outer ring so that the rolling elements rolls,whereinthe holding portion includes a first annular portion and a second annular portion that are disposed respectively at either end of the holding portion in an axial direction of the cage, and a plurality of columns which couples the first annular portion and the second annular portion to each other and which forms a plurality of pockets, in which the rolling elements are accommodated, the plurality of the columns being disposed in a circumferential direction of the holding portion,the plurality of the columns are constituted by a first column portion and a second column portion that are disposed adjacent to each other in the axial direction of the annular holding portion and coupled to each other, andan oil groove is formed in an outer diameter face of at least one of the first column portion and the second column portion, wherein the oil groove is recessed in the outer diameter face, and a base end of the oil groove leads to a corresponding pocket.

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