Bearing device and beading device fixing plate

Patent metadata

Field	Value
Publication number	US-10001174-B2
Application number	US-201515313658-A
Country	US
Kind code	B2
Filing date	May 26, 2015
Priority date	May 27, 2014
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A fixing plate ( 40 ) is provided with through holes ( 45 ) for reducing the rigidity of the fixing plate ( 40 ) between a latch hole ( 41 ) and boss parts ( 42 ), the through holes being disposed between the latch hole ( 41 ) and the boss parts ( 42 ) and radially outward from the outer circumferential surface of an outer ring ( 31 ).

First claim

The invention claimed is:

1. A bearing device comprising:
a rolling bearing having an inner ring, an outer ring and a plurality of rolling elements arranged between the inner ring and the outer ring, and
a retainer plate having a substantially circular hole, a plurality of attachment holes provided around the substantially circular hole and configured to enable each of fastening members to be inserted or screwed thereinto, and a plurality of boss parts formed with the attachment holes, the retainer plate configured to be in contact with the outer ring in an axial direction,
wherein the rolling bearing is fixed to a housing via the retainer plate by fitting the outer ring to the housing and tightening each fastening member to fix the retainer plate to the housing,
wherein a contact surface of the outer ring with which the retainer plate is in contact in the axial direction is positioned at a more axially outboard side by a predetermined distance than a facing surface of the housing that the retainer plate faces,
wherein the retainer plate is formed with rigidity reducing parts for reducing rigidity of the retainer plate at radially outermore sides than an outer peripheral surface of the outer ring between the substantially circular hole and the attachment holes,
wherein the rigidity reducing parts are through-holes each of which is line-symmetrically formed with respect to a virtual line connecting a center of the substantially circular hole and a center of each attachment hole, and
wherein when an outer diameter of a boss part, of the plurality of boss parts, is denoted as d, a radius of the substantially circular hole is denoted as r, and an included angle between lines connecting the center of the substantially circular hole and both circumferential end portions of a through-hole, of the through-holes, is denoted as θ, d/πr×360°≤θ≤180°/the number of boss parts is satisfied.

2. The bearing device according to claim 1 ,
wherein an outer periphery of one axial end portion of the outer ring is provided with a small-diameter step portion to be fitted with the substantially circular hole of the retainer plate, and
wherein the rolling bearing and the retainer plate are mounted to be relatively rotatable without separating from each other by engaging a plurality of crushing portions, which are formed at a peripheral edge portion of the substantially circular hole of the retainer plate, to an engagement groove formed at the small-diameter step portion.

3. A retainer plate for a bearing device having a substantially circular hole and a plurality of attachment holes provided around the substantially circular hole and configured to enable each of fastening members to be inserted or screwed thereinto, and a plurality of boss parts formed with the attachment holes, the retainer plate configured to be in contact with an outer ring of a rolling bearing in an axial direction, the retainer plate configured to fix the rolling bearing to a housing as the retainer plate is fixed to the housing by tightening each fastening member in a state that the outer ring is fitted to the housing,
wherein rigidity reducing parts of reducing rigidity of the retainer plate for a bearing device are formed at radially outermore sides than an outer peripheral surface of the outer ring between the substantially circular hole and the attachment holes,
wherein the rigidity reducing parts are through-holes each of which is line-symmetrically formed with respect to a virtual line connecting a center of the substantially circular hole and a center of each attachment hole, and
wherein when an outer diameter of a boss part, of the plurality of boss parts, is denoted as d, a radius of the substantially circular hole is denoted as r, and an included angle between lines connecting the center of the substantially circular hole and both circumferential end portions of a through-hole, of the through holes, is denoted as θ, d/πr×360°≤θ≤180°/the number of boss parts is satisfied.

Assignees

• Nsk Ltd

Inventors

• Ishibashi Yutaka

Classifications

• F16C2361/61

  Toothed gear systems, e.g. support of pinion shafts · CPC title

• F16C19/06

  with a single row or balls · CPC title

• F16C35/077 Primary

  between housing and outer race ring · CPC title

• F16C35/067 Primary

  Fixing them in a housing (with interposition of an element F16C35/07) · CPC title

• F16C33/586

  outside the space between the races, e.g. end faces or bore of inner ring · CPC title