Bearing preloading device

Patent metadata

Field	Value
Publication number	US-2016290394-A1
Application number	US-201415035562-A
Country	US
Kind code	A1
Filing date	Oct 31, 2014
Priority date	Nov 13, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

In a bearing preloading device in which a compression coil spring is used, a hole is formed in a bearing race or in a separate member from the bearing race, the separate member being axially opposed to the bearing race. The hole has an inner periphery constituted by a threaded portion connected to the bottom surface of the hole, and a shallow hole portion connected to the edge of the hole, and having an inner diameter larger than that of the threaded portion. By axially screwing the compression coil spring into the threaded portion so as to be threadedly engaged in the threaded portion, it is possible to easily prevent the compression coil spring from being pulled out.

First claim

1 . A bearing preloading device comprising at least one compression coil spring configured to axially push a bearing race,
wherein the bearing preloading device further comprises a threaded portion into which the compression coil spring can be axially screwed so as to be threadedly engaged in the threaded portion, and wherein the threaded portion is formed in one of the bearing race and a separate member from the bearing race, the separate member being axially opposed to the bearing race.

2 . The bearing preloading device according to claim 1 , wherein said one of the bearing race and the separate member has an inner periphery defining an axially recessed hole, and comprising the threaded portion, connected to a bottom surface of the hole, and a shallow hole portion connected to an edge of the hole, and having an inner diameter larger than an inner diameter of the threaded portion,
wherein the shallow hole portion is concentric with the threaded portion, and has an inner diameter larger than an outer diameter of the compression coil spring, wherein the compression coil spring has such a natural length that when the compression spring is not compressed, the compression coil spring axially protrudes from the shallow hole portion, and wherein an axial length of the shallow hole portion is set such that the compression coil spring can be compressed until the compression coil spring is entirely received in the hole.

3 . The bearing preloading device according to claim 1 , wherein the threaded portion is formed in the bearing race.

4 . The bearing preloading device according to claim 1 , further comprising an oil seal including an annulus,
wherein the separate member comprises the annulus, and wherein the threaded portion is formed in the separate member.

5 . The bearing preloading device according to claim 1 , wherein the bearing race comprises a component of a rolling bearing supporting a rolling roller shaft of a steel rolling machine.

6 . The bearing preloading device according to claim 2 , wherein the threaded portion is formed in the bearing race.

7 . The bearing preloading device according to claim 2 , further comprising an oil seal including an annulus,
wherein the separate member comprises the annulus, and wherein the threaded portion is formed in the separate member.

8 . The bearing preloading device according to claim 2 , wherein the bearing race comprises a component of a rolling bearing supporting a rolling roller shaft of a steel rolling machine.

9 . The bearing preloading device according to claim 3 , wherein the bearing race comprises a component of a rolling bearing supporting a rolling roller shaft of a steel rolling machine.

10 . The bearing preloading device according to claim 4 , wherein the bearing race comprises a component of a rolling bearing supporting a rolling roller shaft of a steel rolling machine.

11 . The bearing preloading device according to claim 6 , wherein the bearing race comprises a component of a rolling bearing supporting a rolling roller shaft of a steel rolling machine.

12 . The bearing preloading device according to claim 7 , wherein the bearing race comprises a component of a rolling bearing supporting a rolling roller shaft of a steel rolling machine.

Assignees

• Ntn Toyo Bearing Co Ltd

Inventors

• Shimizu Yasuhiro

Classifications

• F16C19/385

  with two rows, i.e. double-row tapered roller bearings · CPC title

• F16C33/60

  divided {or split, e.g. comprising two juxtaposed rings} · CPC title

• F16C2240/14

  Preload · CPC title

• F16C25/083 Primary

  with resilient means acting axially on a race ring to preload the bearing · CPC title

• F16C2322/12

  Rolling apparatus, e.g. rolling stands, rolls · CPC title