Patent ID: 9618041
Date: 2017-04-11
CPC Classifications: F16C,F16H

Claim:
1. A needle roller and cage assembly, comprising: a plurality of needle rollers arranged in a single row; and a cage having a width dimension larger than a diameter thereof, the cage comprising: the plurality of pillar sections form pockets for receiving the needle rollers, each of the pockets has a rectangular shape with its short sides being parallel to the pair of annular sections, each of the pockets comprises a second relief portion in each of four corners thereof, the second relief portions being formed by partially cutting out each of the plurality of pillar sections, each of the second relief portions extends in the axial direction of the cage from a position at which one of the short sides of each of the pockets is elongated in a circumferential direction of the cage to an outer end of the roller retaining portion on the radially outer side, and each of the second relief portions has a portion extending parallel to the axial direction of the cage, the cage is an outer race guiding cage, the cage having an outer circumferential surface including a radially outer guide surface located in a region from one of the annular sections to at least an inner end of the roller retaining portion on the radially outer side, an axial length of the roller retaining portion on the radially inner side is longer than an axial length of the roller retaining portion on the radially outer side, and an axial dimension of the second relief portion is set to 40% or more and 70% or less of an axial dimension from the one of the short sides of each of the pockets to the inner end of the roller retaining portion on the radially outer side.