JPH0639204U - Double-row rolling bearing device for roll neck of rolling mill - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a double-row rolling bearing device for a roll neck of a rolling mill, in which a nozzle having a mist hole is securely fixed to a nozzle fitting hole of an outer ring. [Structure] A nozzle 16 having a mist hole 20 is loosely fitted in a nozzle fitting hole 15 formed between double rows of raceways 12A of an integral outer ring 12, and an annular groove 21 formed on a peripheral surface of the nozzle 16 is formed. The inside and outside of the bearing are sealed with the fitted O-ring 22, and the nozzle 16 is fixed to the nozzle fitting hole 15 of the outer ring 12 by the expansion portion 16B formed by caulking the inner end of the nozzle 16. A double row rolling bearing device for a roll neck of a rolling mill.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a double row rolling bearing device used for a roll neck of a rolling mill.

As a conventional double-row rolling bearing device for a roll neck of a rolling mill, a double-row cylindrical roller bearing device shown in FIGS. 3 and 4 is known.

That is, the above-mentioned double-row cylindrical roller bearing device is provided with a shaft box 1 and a multi-row track 3A which is fitted to the shaft box 1 and which is formed on the inner and outer circumferences of the center flange 5 between the tracks 3A. The outer ring 3 having a plurality of nozzle fitting holes 6 on the circumference communicating with the surface, the cylindrical inner ring 2 without a collar having the raceway 2A formed on the outer peripheral surface, and the inner ring 2 and the outer ring 2 Nozzle 7 having a plurality of cylindrical rollers 4 each of which is rolled between three orbits 2A and 3A, and one mist hole 8 is press-fitted into the nozzle fitting hole 6 to form a cylinder. The rollers 4 are guided to roll by separate end flanges 5A, 5B and central flanges 5 arranged at both ends of the outer ring 1, and the nozzle fitting of the outer ring fitting hole peripheral surface 1A of the axle box 1 is performed. A peripheral groove G communicating with the mist supply passage 9 provided in the shaft box 1 is formed at a position facing the hole 6. To do.

In the case of FIGS. 3 and 4, since the double row cylindrical roller bearings are used in parallel to form the four cylindrical roller rows, the ends of the outer rings 3 of both bearings on the opposite side are opposed to each other. The collar 5A has a structure as a spacer for both outer rings. A mist discharge hole M communicating with a mist discharge passage (not shown) formed in the axle box 1 is formed in the end flange 5A which is the spacer.

The other end collar 5B of the outer ring 3 is axially fixed by shaft retainers P and Q fixed to the axle box by means not shown.

[0006]

[Problems to be solved by the device]

 Since the conventional nozzle 7 is press-fitted into the nozzle fitting hole 6 of the outer ring 3 and fixed only by the interference with the peripheral wall of the nozzle fitting hole 6, if the interference is inadequate, the bearing lower side 5, the nozzle 7 falls off from the nozzle fitting hole 6 of the outer ring 3 and the end of the nozzle 7 fits into the circumferential groove G of the shaft box 1, so that when the bearing is replaced, the outer ring 3 moves. It may become difficult to remove the bearing, which may hinder bearing replacement. Further, since the nozzle 7 is press-fitted into the nozzle fitting hole 7 to be assembled, the assembling property is poor.

[0007]

[Means for solving problems]

 According to this invention, a shaft box and a double-row orbit that is fitted in the shaft box are formed, and a plurality of nozzle fitting holes communicating with the outer peripheral surface are provided on the circumference between the tracks. An integral outer ring, an inner ring having a raceway corresponding to the race of the outer ring, a rolling element that is rolled between the inner ring and the outer ring, and a nozzle that has a mist hole and is fitted into each of a plurality of nozzle fitting holes. , A double row rolling bearing device for a roll neck of a rolling mill having a circumferential groove formed at a position facing the nozzle fitting hole on the outer peripheral surface of the outer ring fitting hole of the shaft box and communicating with a mist supply passage provided in the shaft box Is loosely fitted in the nozzle fitting hole of the outer ring and is fixed in the nozzle fitting hole by the fixing means, and an annular groove is formed on the peripheral surface of the nozzle. The elastic ring that contacts the Characterized in that between the surface and the nozzle fitting hole periphery is sealed. Further, in claim 2, the inner end portion of the nozzle is fixed by the fixing means. Further, according to a third aspect of the present invention, the fixing means is an expanding portion by caulking the inner end portion of the nozzle toward the peripheral edge of the nozzle fitting hole.

[0008]

[Action]

 Since the nozzle is fixed to the nozzle fitting hole of the outer ring by the fixing means, there is no risk of the nozzle falling off, and since the nozzle is loosely fitted in the nozzle fitting hole, it is easy to assemble.

[0009]

【Example】

 An embodiment of the present invention will be described below. The embodiment of FIGS. 1 and 2 is a case where the double row cylindrical roller bearing devices are used in parallel and the number of cylindrical roller rows is four. Reference numeral 10 denotes an axle box, in which an integral outer ring 12 having a double row of tracks 12A formed on its inner peripheral surface is loosely fitted. A plurality of nozzle fitting holes 15 communicating with the inner and outer peripheral surfaces are formed on the central flange 14 between the double-row raceways 12A of the outer ring 12 on the circumference.

Reference numeral 11 is a cylindrical inner body without a collar, and one or a plurality of raceways 11 A corresponding to the plurality of raceways 12 A of the outer ring 12 are formed. Although the inner ring 11 is an integral type, it may be a plurality of inner rings corresponding to each track 12A of the outer ring 12.

Reference numeral 13 denotes a cylindrical roller that rolls between the raceways 11A and 12A of the inner and outer rings 11 and 12, respectively. The cylindrical roller 13 is guided by a central flange 14 of the outer ring 12 and end flanges 17 and 18 separately arranged at both ends of the outer ring 12. In the embodiment, the end flanges 17 on the opposite sides of both outer rings 12 serve as spacers that also serve as both outer rings, and the end flanges 17 that are the spacers are provided with a mist (not shown) formed on the axle box 10. A mist discharge hole 19 communicating with the discharge passage is formed. The other end flange 18 of each outer ring 12 is axially fixed by bearing retainers 28 and 29 fixed to the shaft box 10 by means not shown.

The nozzle fitting hole 15 of the outer ring 12 is formed with a stepped portion 15A having a small diameter on the inner side of the bearing, and two mist holes 20 communicating the inner and outer ends are formed in the nozzle fitting hole 15. The nozzle 16 is loosely fitted. A stepped portion 16A having a small diameter inside the bearing is formed in the nozzle 16, and the stepped portion 16A of the nozzle 16 is placed on the stepped portion 15A of the nozzle fitting hole 15. Thereby, the nozzle 16 is positioned with respect to the nozzle fitting hole 15. The number of mist holes may be one or two or more. Further, an annular groove 21 is formed on the peripheral surface of the nozzle 16, and an O-ring 22 that contacts the peripheral wall of the nozzle fitting hole 15 is fitted into the annular groove 21 to seal the inside and outside of the bearing. . The O-ring 22 is not limited to this, and may be any elastic ring that can seal the inside and outside of the bearing.

Further, the inner end of the nozzle 16 is caulked toward the slope 15B formed on the peripheral edge of the nozzle fitting hole 15 to form a widened portion 16B along the slope 15B. It is fixed in the fitting hole 15. This caulking may be performed at the inner circumferential portion of the nozzle 16 at several circumferential positions or at the entire circumference. The fixing means for the nozzle 16 is not limited to the above-described widening portion by caulking, and after the separate member is assembled to the nozzle, it is attached to the inner end of the nozzle to fix the nozzle in the nozzle fitting hole. The nozzle may be fixed at an appropriate position by an appropriate means. Further, the end of the nozzle 16 on the outer side of the bearing is immersed in the nozzle fitting hole 15 by a fixed distance h. The space 30 of the nozzle fitting hole 15 formed by this distance h is used for inserting a jig (not shown) when handling the bearing.

A peripheral groove 24 communicating with the mist supply passage 23 formed in the shaft box 10 is formed at a position of the outer ring fitting hole peripheral surface 10 A of the shaft box 10 facing the nozzle fitting hole 15. Further, a peripheral groove 25 facing the peripheral groove 24 of the shaft box 10 is formed on the outer peripheral portion of the nozzle fitting hole 15 of the outer ring 10. Further, reference numeral 26 is an O-ring fitted in a peripheral groove 27 formed on the outer peripheral surface of the outer ring 10 to prevent the mist supplied by coming into contact with the inner peripheral surface 10A of the shaft box from escaping to the outside of the bearing. ing. In the embodiment, the double-row cylindrical roller bearing device is used, but it goes without saying that the present invention can be applied to other bearing types such as a double-row tapered roller bearing device.

[0015]

【effect】

 This invention is configured as described above. Since the nozzle is fixed in the nozzle fitting hole of the outer ring by the fixing means, there is no risk of the nozzle falling off, and the nozzle is loose in the nozzle fitting hole. As it is fitted, it can be easily assembled.

[0016]

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional device.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is a diagram showing a state where the nozzle of the conventional device is dropped off.

[Explanation of symbols]

10 Axle Box 11 Inner Ring 12 Outer Ring 13 Cylindrical Roller 15 Nozzle Fitting Hole 16 Nozzle 16B Expanding Part (Fixing Means) 20 Mist Hole 21 Annular Groove 22 O-ring

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[Procedure amendment]

[Submission date] August 3, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Name of device

[Correction method] Change

[Correction content]

[Title of device] Double row rolling bearing device for roll neck of rolling mill

Claims (3)

[Scope of utility model registration request] 1. A shaft box and a plurality of rows of orbits that are fitted in the shaft box and are formed in a plurality of rows. Nozzle fitting holes communicating with the outer peripheral surface are provided on the circumference between the orbits. Integrated outer ring, an inner ring having a raceway corresponding to that of the outer ring, a rolling element that is rolled between the inner ring and the outer ring, and a nozzle that is formed with a mist hole and is fitted into a plurality of nozzle fitting holes, respectively. And a double-row rolling bearing device for a roll neck of a rolling mill having a circumferential groove formed at a position facing the nozzle fitting hole on the outer circumferential surface of the outer ring fitting hole of the shaft box and communicating with a mist supply passage provided in the shaft box, The nozzle is loosely fitted in the nozzle fitting hole of the outer ring and is fixed in the nozzle fitting hole by a fixing means, and an annular groove is formed on the peripheral surface of the nozzle. The elastic ring that comes into contact with the Roll neck for the double row rolling bearing unit of the rolling mill between nozzle fitting hole circumferential surface, characterized in that it is sealed. 2. The double row rolling bearing device for a roll neck of a rolling mill according to claim 1, wherein an inner end portion of the nozzle is fixed by the fixing means. 3. The double row for a roll neck of a rolling mill according to claim 2, wherein the fixing means is an expanded portion of the inner end portion of the nozzle by caulking toward the peripheral edge of the nozzle fitting hole. Rolling bearing device.