JP2007198464A - Cylindrical roller bearing with alignment ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical roller bearing with an alignment ring, capable of increasing the basic rated load of a cylindrical roller bearing with alignment ring used in a continuous casting facility or the like and extending the bearing life. <P>SOLUTION: This cylindrical roller bearing with alignment ring 10 comprises an inner ring 14, an outer ring 12 having a spherical outer circumferential surface 12a, a plurality of cylindrical rollers 13 disposed between the inner ring and the outer ring, and an alignment ring 11 having a spherical inner circumferential surface 11a corresponding to the outer circumferential surface of the outer ring. The inner ring includes collar parts 14a and 14b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cylindrical roller bearing with a centering ring used in steel facilities and the like.

  In recent years, in steelmaking facilities, there has been a demand for extending the life of bearings used in facilities with the aim of increasing production efficiency and reducing costs. Continuous casting equipment is no exception, and it is expected to extend the life of the bearing in order to prevent sudden accidents by improving the durability of the bearing and extend the roll segment replacement cycle (see Non-Patent Document 1 below).

FIG. 3 shows a conventional cylindrical roller bearing with a centering ring used as a guide roll bearing in a continuous casting facility. The conventional cylindrical roller bearing with a centering ring in FIG. 3 has a plurality of cylindrical rollers 53 disposed between an inner ring 54 and an outer ring 52, and a spherical inner periphery in which the aligning ring 51 contacts the outer peripheral surface of the outer ring 52. The flanges 52 a at both ends of the outer ring 52 are engaged with the cylindrical rollers 53.
“Steel Equipment Bearings” NSK Bearing Product Catalog No. 1268 (pages 13-18 and 29)

  In the cylindrical roller bearing with aligning ring as shown in FIG. 3, in order to increase the basic load rating, means such as increasing the roller length or increasing the number of rollers relative to the proportion of the existing bearing can be considered. For example, when the roller diameter is the same and the roller length is increased, the outer ring 52 has a spherical shape, so that the outer ring 52 becomes thinner as it approaches the end face, and the flange 52a of the outer ring 52 and the strength in the vicinity thereof are increased. descend. Also, when the number of rollers is increased, the roller PCD (pitch circle diameter) is increased, so that the outer ring 52 becomes thin, and the strength of the flange portion 52a of the outer ring 52 decreases. As described above, if the roller length is increased or the number of rollers is increased to increase the basic load rating, the strength of the flange portion 52a of the outer ring 52 and the vicinity thereof is reduced, and the life of the bearing is shortened.

  In view of the above-described problems of the conventional technology, the present invention can increase the basic load rating of a cylindrical roller bearing with a centering ring used in a continuous casting facility or the like and can extend the bearing life. An object of the present invention is to provide a cylindrical roller bearing with a centering ring.

  In order to achieve the above object, a cylindrical roller bearing with a centering ring according to the present invention includes an inner ring, an outer ring having a spherical outer peripheral surface, and a plurality of cylindrical rollers disposed between the inner ring and the outer ring. A cylindrical roller bearing with a centering ring comprising a centering ring having a spherical inner peripheral surface corresponding to the outer peripheral surface of the outer ring, wherein the inner ring includes a collar portion.

  According to this cylindrical roller bearing with a centering ring, by providing a collar on the inner ring instead of the outer ring, when a moment load is applied to the bearing, the stress generated on the collar on the outer ring side as in the past is applied. Since there is no need to consider, even if the cylindrical roller diameter or cylindrical roller length is made larger than before, there is no problem of strength reduction at both ends of the outer ring and in the vicinity thereof. For this reason, since at least one of the cylindrical roller diameter and the cylindrical roller length can be made larger than before, the basic rated load of the cylindrical roller bearing with the aligning ring can be increased and the bearing life can be extended.

  In the cylindrical roller bearing with the aligning ring, the collar portion of the inner ring can be configured to engage with the cylindrical roller and guide the cylindrical roller during rotation of the bearing.

  Another cylindrical roller bearing with a centering ring according to the present invention includes an inner ring, an outer ring having a spherical outer peripheral surface, a plurality of cylindrical rollers disposed between the inner ring and the outer ring, and an outer peripheral surface of the outer ring. A cylindrical roller bearing with a centering ring that has a spherical inner peripheral surface corresponding to the inner ring, and engages with the cylindrical roller on the inner ring side to guide the cylindrical roller during rotation of the bearing Thus, a holding member disposed on at least one end side of the inner ring is provided.

  According to this cylindrical roller bearing with a centering ring, by providing a holding member that holds the cylindrical roller not on the outer ring but on the inner ring side, when a moment load is applied to the bearing, it is applied to the flange part on the outer ring side as before. Since there is no need to consider the generated stress, even if the diameter of the cylindrical roller or the length of the cylindrical roller is made larger than before, there is no problem of strength reduction at both ends of the outer ring and in the vicinity thereof. For this reason, since at least one of the cylindrical roller diameter and the cylindrical roller length can be made larger than before, the basic rated load of the cylindrical roller bearing with the aligning ring can be increased and the bearing life can be extended.

  In the cylindrical roller bearing with the aligning ring, a holding member may be provided on both end sides of the inner ring, but the collar portion provided on the inner ring and the holding member are engaged with the cylindrical roller and the bearing is rotating during the rotation of the bearing. You may comprise so that a cylindrical roller may be guided.

  The cylindrical roller bearing with a centering ring is preferably used in a continuous casting facility such as a rolling mill.

  According to the cylindrical roller bearing with the aligning ring of the present invention, it can be used for iron making equipment of continuous casting equipment, and the basic rated load of the bearing can be increased and the bearing life can be extended.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  <First Embodiment>

  FIG. 1 is a sectional view of a cylindrical roller bearing with a centering ring according to the first embodiment.

  1 includes a cylindrical inner ring 14, an outer ring 12 having a spherical outer peripheral surface 12 a, and a plurality of cylindrical rollers 13 disposed between the inner ring 14 and the outer ring 12. And an aligning ring 11 having a spherical inner peripheral surface 11a corresponding to the outer peripheral surface 12a of the outer ring 12, and is a full-roller type with a high load capacity design.

  Further, in the cylindrical roller bearing 10 with the aligning ring, flange portions 14a and 14b are provided at both ends of the cylindrical outer peripheral surface of the inner ring 14. The cylindrical roller 13 partially enters a recess 14c formed between the flange portions 14a and 14b and comes into contact with the recess 14c, and the flange portions 14a and 14b engage with the cylindrical roller 13 at both ends, and the cylindrical roller 13 Is supposed to hold.

  The outer ring 12 is slidably in contact with the inner peripheral surface 11a of the aligning ring 11 at the outer peripheral surface 12a, and the inner peripheral surface 12d is configured as a cylindrical inner peripheral surface from one end 12b to the other end 12c. And contact with the cylindrical roller 13 at the inner peripheral surface 12d.

  The cylindrical roller bearing 10 with a centering ring in FIG. 1 is used for a guide roll of a rolling mill, for example, in a continuous casting facility, and a guide roll (not shown) of the rolling mill is fitted to the inner peripheral surface of the inner ring 14 to align the roller. The ring 11 is fixed via a bearing box.

  When the guide roll of the rolling mill fitted to the inner ring 14 in FIG. 1 rotates, the cylindrical roller 13 is held and guided by the flange portions 14a and 14b at both ends of the inner ring 14, and the rotating guide roll is bent. When this occurs, the outer ring 12 moves and aligns on the inner peripheral surface 11a and the outer peripheral surface 12a with respect to the fixed aligning ring 11, and the deflection of the guide roll can be absorbed.

  As described above, according to the cylindrical roller bearing 10 with the aligning ring according to the first embodiment, the collar portions 14a and 14b are provided on the inner ring 14 side, not the configuration in which the collar portion is provided on the outer ring side, unlike the conventional case. By adopting a bearing type, when a moment load is applied to the bearing, it is not necessary to consider the stress generated in the flange portion 52a on the outer ring side as in FIG. Even if the roller length is made longer than before, there is no problem of strength reduction at both ends 12b, 12c of the outer ring 12 and the vicinity thereof.

  Accordingly, at least one of the cylindrical roller diameter and the cylindrical roller length can be made larger than before, so that the basic load rating of the cylindrical roller bearing with the aligning ring can be increased and the bearing life can be extended. As a result, in an iron manufacturing facility such as a continuous casting facility, it is possible to prevent sudden accidents by extending the durability of the bearing and to extend the roll segment replacement cycle.

  <Second to Fourth Embodiments>

  Next, 2nd thru | or 4th embodiment of the cylindrical roller bearing 10 with a centering ring of FIG. 1 is described with reference to FIG. FIG. 2 is a sectional view (a) schematically showing a cylindrical roller bearing with a centering ring according to the second embodiment, a sectional view (b) showing a third embodiment, and a third embodiment. It is sectional drawing (c) which shows this.

  The cylindrical roller bearing with the aligning ring according to the second embodiment shown in FIG. 2A omits one collar portion 14a of the inner ring 14 of the cylindrical roller bearing 10 with the aligning ring shown in FIG. The holding member 15 is disposed on one end side of the inner ring 14 as a separate member. The holding member 15 and the other collar portion 14 b of the inner ring 14 engage with the cylindrical roller 13 at both ends on the inner ring 14 side, and hold the cylindrical roller 13.

  The cylindrical roller bearing with the aligning ring according to the third embodiment shown in FIG. 2B omits one collar portion 14a of the inner ring 14 of the cylindrical roller bearing 10 with the aligning ring shown in FIG. The holding member 16 is disposed on one end side of the inner ring 14 as a separate member. The holding member 16 has a holding portion 16a protruding toward the concave portion 14c, and the holding portion 16a and the other collar portion 14b of the inner ring 14 engage with the cylindrical roller 13 at both ends on the inner ring 14 side. Hold.

  The cylindrical roller bearing with the aligning ring according to the fourth embodiment shown in FIG. 2 (c) omits both the flange portions 14a, 14b of the inner ring 14 of the aligning ring-equipped cylindrical roller bearing 10 of FIG. -Shaped holding members 15 and 17 are arranged on both end sides of the inner ring 14. The holding members 15 and 17 are engaged with the cylindrical roller 13 at both ends on the inner ring 14 side to hold the cylindrical roller 13.

  According to the cylindrical roller bearing with the aligning ring of the above-described second to fourth embodiments, unlike the conventional configuration, the configuration is such that the collar portion is provided on the outer ring side, and the bearing type that holds the cylindrical roller 13 on the inner ring 14 side. Therefore, when a moment load is applied to the bearing, it is not necessary to consider the stress generated in the flange portion 52a on the outer ring side as shown in FIG. Even if the height is made larger than the conventional one, the problem of strength reduction does not occur at both ends 12b, 12c of the outer ring 12 and the vicinity thereof. Therefore, the same effect as the first embodiment can be obtained.

  As described above, the best mode for carrying out the present invention has been described, but the present invention is not limited to these, and various modifications are possible within the scope of the technical idea of the present invention. Such modifications also belong to the technical scope of the present invention. For example, although the embodiment of FIG. 1 is a full-roller type cylindrical roller bearing with a centering ring, the present invention is not limited to this and may be a type with a cage.

It is sectional drawing which shows schematically the cylindrical roller bearing with a centering ring by 1st Embodiment. Sectional drawing (a) which shows schematically the cylindrical roller bearing with the aligning ring by 2nd Embodiment, sectional drawing (b) which shows 3rd Embodiment, and sectional drawing which shows 4th Embodiment (C). It is sectional drawing which shows schematically the conventional cylindrical roller bearing with a centering ring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cylindrical roller bearing with a centering ring 11 Centering ring 11a Inner peripheral surface 12 Outer ring 12a Outer peripheral surface 12b One end part 12c Other end part 12d Inner peripheral surface 13 Cylindrical roller 14 Inner ring 14a, 14b Collar part 14c Recessed part 15, 16, 17 Holding Element

Claims (5)

An inner ring, an outer ring having a spherical outer peripheral surface, a plurality of cylindrical rollers disposed between the inner ring and the outer ring, and a aligning ring having a spherical inner peripheral surface corresponding to the outer peripheral surface of the outer ring A cylindrical roller bearing with a centering ring,
A cylindrical roller bearing with a centering ring, wherein the inner ring includes a collar portion.   The cylindrical roller bearing with a centering ring according to claim 1, wherein a flange portion of the inner ring engages with the cylindrical roller and guides the cylindrical roller during rotation of the bearing. An inner ring, an outer ring having a spherical outer peripheral surface, a plurality of cylindrical rollers disposed between the inner ring and the outer ring, and a aligning ring having a spherical inner peripheral surface corresponding to the outer peripheral surface of the outer ring A cylindrical roller bearing with a centering ring,
A cylindrical roller bearing with a centering ring, comprising: a holding member disposed on at least one end side of the inner ring so as to engage with the cylindrical roller on the inner ring side and guide the cylindrical roller during rotation of the bearing.   4. A cylindrical roller bearing with a centering ring according to claim 3, wherein a flange provided on the inner ring and the holding member engage with the cylindrical roller to guide the cylindrical roller during rotation of the bearing.   The cylindrical roller bearing with an aligning ring according to claim 1 or 2, wherein the cylindrical roller bearing with an aligning ring is used in a continuous casting facility.

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