Needle roller bearing with double row of retainers

Patent metadata

Field	Value
Publication number	US-10184517-B2
Application number	US-201415034620-A
Country	US
Kind code	B2
Filing date	Nov 14, 2014
Priority date	Nov 21, 2013
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

A retainer-equipped double-row needle-roller bearing includes a pair of annular end flange portions; a center annular center flange portion; and two rows of pillars connecting the portions to each other to provide pockets between mutually adjacent pairs of pillars in a circumferential direction for holding rollers in two rows. The center flange portion has an outer diameter (φD2), and the end flange portions have an outer diameter (φD1), in a relationship expressed as φD2<φD1. When the retainer moves radially by an amount of gap associated with the rollers, the retainer is guided on the outer diameter surfaces of the end flange portions at two ends of the retainer, by the inner diameter surface of a housing. This stabilizes behavior of the retainer during rotation, reducing premature wear and abnormal noise.

First claim

The invention claimed is:

1. A retainer-equipped double-row needle-roller bearing comprising:
a retainer designed to be guided on an outer diameter of the retainer, the retainer including:
a pair of annular end flange portions;
an annular center flange portion; and
two rows of pillars connecting said pair of end flange portions and said center flange portion to each other, and the end flange portions, the center flange portion, and the pillars form a single member in a thickness direction and in an axial direction and are heat treated; and
a plurality of rollers held in the pockets of the retainer,
wherein the center flange portion is made to have a thickness T 2 smaller than a thickness T 1 of each end flange portion of the pair of end flange portions at two ends and the center flange portion and the pair of end flange portions are made to have a greater thickness than a thickness of the pillars in a radial direction, thereby the radial thickness of the retainer is made unequal in its axial direction, and the center flange portion has an outer diameter (φD 2 ), each end flange portion of the pair of end flange portions has an outer diameter (φD 1 ), and the outer diameter (φD 2 ) of the center flange portion and the outer diameter (φD 1 ) of each end flange portion are made to have a relationship of φD 2 <φD 1 .

2. The retainer-equipped double-row needle-roller bearing according to claim 1 , wherein the thickness T 2 of the center flange portion and the thickness T 1 of each end flange portion of the pair of end flange portions at the two ends have a relationship of T 2 ≥0.80×T 1 .

Assignees

• Ntn Toyo Bearing Co Ltd

Inventors

• KAJIKAWA Syuichi

Classifications

• F16C33/4605

  Details of interaction of cage and race, e.g. retention or centring · CPC title

• F16C33/545

  rolled from a band · CPC title

• F16C2226/36

  by welding · CPC title

• F16C19/527

  related to vibration and noise · CPC title

• F16C33/48

  for multiple rows of rollers or needles · CPC title