JP2004028139A - Double row tapered roller bearing with aligning ring - Google Patents

Abstract

An inexpensive double-row tapered roller bearing with an aligning ring that can be used in place of a spherical roller bearing without using a spacer.
A double-row tapered roller bearing with an aligning ring has an outer peripheral surface (11b) of an outer ring (11) of a double-row tapered roller bearing (10) having a spherical convex surface, and an inner peripheral surface of an aligning ring (50) disposed outside the outer ring (11). 50a is a spherical concave surface corresponding to the spherical convex surface, and the outer peripheral surface 11b of the outer ring 11 and the inner peripheral surface 50a of the aligning ring 50 are fitted so that the relative swing displacement between the aligning ring 50 and the outer ring 11 can be freely adjusted. Is done. The axial width B3 of the aligning ring 50 is equal to the combination width B1 of the pair of inner rings 12, 12 of the double row tapered roller bearing 10, and is wider than the axial width B2 of the outer ring 11.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a double-row tapered roller bearing with an aligning ring, which is used to support a rotary shaft that undergoes relatively large deformation (bending) due to a large radial load such as a central shaft of a rolling mill roll and a thrust load. To improved double row tapered roller bearings with centering rings.
[0002]
[Prior art]
As a bearing for supporting a rotating shaft that receives a large radial load and a thrust load in addition to a large radial load, such as the center axis of a roll for a rolling mill, and has a large shaft length and relatively large bending deformation of the shaft due to the load, Mainly self-aligning roller bearings have been used. Spherical roller bearings can support not only large radial loads but also thrust loads, and even when the rotating shaft tends to tilt, local loads such as edge loads are not applied to the components. Because it can be However, on the other hand, since spherical rollers are used as the rollers, there are problems such as an increase in cost.
[0003]
Therefore, when replacing a bearing, it has been considered to replace the bearing with a double-row tapered roller bearing with an aligning ring capable of exhibiting the same function. This is because the double-row tapered roller bearing with an aligning ring uses tapered rollers whose manufacturing cost is relatively low.
[0004]
FIG. 3 shows a configuration of a conventional double-row tapered roller bearing with an aligning ring described in Japanese Patent Application Laid-Open No. 10-250467.
In the double-row tapered roller bearing with an aligning ring, the aligning ring 20 is disposed outside the outer ring 11 of the double-row tapered roller bearing 10, and the outer peripheral surface 11 b of the outer ring 11 is formed into a spherical convex surface. The inner peripheral surface 20a of the aligning ring 20 disposed outside is a spherical concave surface corresponding to the spherical convex surface, and the outer peripheral surface 11b of the outer ring 11 and the inner peripheral surface 20a of the aligning ring 20 are aligned with the aligning ring 20. The outer ring 11 and the outer ring 11 are fitted with each other so as to be freely swingable.
[0005]
The double-row tapered roller bearing 10 includes one outer ring 11, a pair of inner rings 12, 12, and a plurality of tapered rollers 13, 13.
On the inner peripheral surface of the outer race 11, double rows of outer raceways 11a, 11a are formed. Each of the outer raceways 11a, 11a has a conical concave shape, and is formed of a tapered surface that is inclined in directions opposite to each other and in a direction in which the inner diameter increases toward the opening.
Therefore, the inner diameter of the outer race 11 is smallest at the center and gradually increases toward the openings at both ends.
[0006]
Conical convex inner ring tracks 12a, 12a are formed on the outer peripheral surfaces of the pair of inner rings 12, 12, respectively. An outer flange-shaped large-diameter flange 12d is formed at the large-diameter end of the inner raceway 12a on the outer peripheral surface of one end (the left and right ends in the drawing) of each of the inner rings 12, 12. An outer flange-shaped small-diameter flange 12c is formed at the small-diameter end of the inner raceway 12a on the outer peripheral surface of the other end (the center end in the drawing) of each of the inner races 12, 12.
[0007]
The pair of inner rings 12, 12 are in a back-to-back combination state in which the small diameter side flange portions 12c, 12c face each other, and a spacer 15 is interposed between the end surfaces.
A plurality of the tapered rollers 13 are arranged between the outer raceways 11a, 11a and the inner raceways 12a, 12a, respectively, in such a manner as to be freely rolled in the pockets of the retainers 14, 14. .
In the double-row tapered roller bearing 10 in the rear-side combination state, the axial width B2 of the outer ring 11 is set smaller than the combination width B1 of the inner ring 12.
[0008]
[Problems to be solved by the invention]
Meanwhile, in the conventional double row tapered roller bearing with an aligning ring shown in FIG. 3, the axial width B3 of the aligning ring 20 is set to be equal to the axial width B2 of the outer ring 11 which is smaller than the combination width B1 of the inner ring 12. ing.
Therefore, in order to use the above-described double-row tapered roller bearing with an aligning ring in place of the self-aligning roller bearing in which the inner ring and the outer ring have the same axial width, the width of the bearing fitting portion on the housing side is required. As shown in the figure, the spacers 30 in the axial width S must be fitted to both ends of the outer race 11 in accordance with the dimension H1.
[0009]
The spacer 30 is manufactured with high precision so that the total dimension of the axial widths of the outer ring 11 and the two spacers 30 is equal to the combination width B1 of the inner ring 12 in a state where the spacers 30 are arranged on both ends of the outer ring 11. Must-have. Also, the perpendicularity of both end faces to the outer peripheral face must be accurately obtained.
Therefore, there are problems that the number of parts is increased, the assemblability is poor, and the parts management cost is high.
[0010]
Accordingly, an object of the present invention is to solve the above-described problems, and provides an inexpensive double-row tapered roller bearing with an aligning ring that can be used instead of a spherical roller bearing without using a spacer. It is to be.
[0011]
[Means for Solving the Problems]
The object of the present invention is to form a spherical convex surface on the outer peripheral surface of the outer ring of the double row tapered roller bearing, and a spherical concave surface corresponding to the spherical convex surface on the inner peripheral surface of the aligning ring disposed outside the outer ring. A double-row tapered roller bearing with an aligning ring, wherein the outer peripheral surface of the outer ring and the inner peripheral surface of the aligning ring are fitted so as to allow relative swing displacement between the aligning ring and the outer ring, Wherein the axial width of the double-row tapered roller bearing is equal to the combination width of the inner ring of the double-row tapered roller bearing, and is wider than the axial width of the outer ring. .
[0012]
According to the double-row tapered roller bearing with an aligning ring having the above-described configuration, the axial width of the aligning ring is equal to the combination width of the inner ring. Therefore, the self-aligning roller having a configuration in which the outer ring and the inner ring have the same axial width. Even when the bearing is used instead of the bearing, it can be installed at the position where the self-aligning roller bearing was previously installed, without using a spacer, as it is.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a double-row tapered roller bearing with an aligning ring according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a longitudinal sectional view of a double row tapered roller bearing with an aligning ring according to one embodiment of the present invention, and FIG. 2 is a partially enlarged view of the aligning ring shown in FIG.
[0014]
As shown in FIG. 1, the double-row tapered roller bearing with an aligning ring according to the present embodiment includes an aligning ring 50 disposed outside the outer ring 11 of the double-row tapered roller bearing 10, and an outer peripheral surface 11 b of the outer ring 11. Is a spherical convex surface, and the inner peripheral surface 50a of the centering ring 50 arranged outside the outer ring 11 is a spherical concave surface corresponding to the spherical convex surface, and the outer peripheral surface 11b of the outer ring 11 and the inner The peripheral surface 50a is fitted so that the relative swing displacement between the alignment ring 50 and the outer ring 11 can be freely adjusted. The configuration of the double-row tapered roller bearing 10 is the same as that of the conventional example shown in FIG.
[0015]
The centering ring 50 according to the present embodiment has an axial width B3 substantially equal to the combination width B1 of the pair of inner rings 12, 12, and the axial range substantially equal to the axial width B2 of the outer ring 11 is smaller. Outside the inner peripheral surface 50a formed as a spherical concave surface, there is provided an annular space 50b for escape during spherical processing. However, the combination width B1 of the pair of inner rings 12, 12 is a dimension including the axial width of the spacer 15 interposed between the end faces.
[0016]
That is, according to the double row tapered roller bearing with an aligning ring of the present embodiment, the axial width B3 of the aligning ring 50 is equal to the combination width B1 of the combined inner rings 12, 12. When used in place of a spherical roller bearing in which the outer ring and the inner ring have the same axial width, they remain in the bearing fitting part on the housing side where the spherical roller bearing was previously installed. It is not necessary to fit the spacer 30 like the conventional double row tapered roller bearing with a centering ring shown in FIG.
[0017]
Therefore, the double-row tapered roller bearing with an aligning ring of the present embodiment is provided with spherical rollers that are cumbersome to manufacture without using spacers that require a large number of parts, have poor assemblability, and require high parts management costs. It can be used as an alternative to spherical roller bearings, and can greatly reduce costs.
[0018]
Further, since the axial width B3 of the aligning ring 50 is wider than the axial width B2 of the outer ring 11, the axial direction B of the aligning ring 50 is wider than the axial width B2 of the outer ring 11. A bearing load hardly acts on both ends, and it is sufficient if the bearing can receive a supporting and fixing force in the axial direction when installed on the bearing fitting portion on the housing side.
[0019]
Therefore, at both ends in the axial direction of the outer peripheral surface of the aligning ring 50, a gentle inclined portion 50c serving as an insertion guide for facilitating assembly to a housing or the like can be provided.
Therefore, according to the double-row tapered roller bearing with an aligning ring of the present embodiment, the assemblability to a housing or the like can be easily improved.
[0020]
The configuration of the double-row tapered roller bearing, the aligning ring, and the like in the double-row tapered roller bearing with an aligning ring of the present invention is not limited to the configuration of the above-described embodiment, and various configurations based on the gist of the present invention are provided. It is needless to say that the form can be adopted.
[0021]
【The invention's effect】
As described above, according to the double row tapered roller bearing with an aligning ring of the present invention, since the axial width of the aligning ring is equal to the combination width of the inner ring, the outer ring and the inner ring have the same axial width. When used in place of the spherical roller bearing having the above configuration, the spherical roller bearing can be installed in a position where the spherical roller bearing was previously installed without using a spacer, as it is.
Therefore, it is possible to provide an inexpensive double-row tapered roller bearing with an aligning ring that can be used instead of the spherical roller bearing without using the spacer.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a double-row tapered roller bearing with an aligning ring according to an embodiment of the present invention.
FIG. 2 is a partially enlarged view of the alignment ring shown in FIG. 1;
FIG. 3 is a longitudinal sectional view of a conventional double row tapered roller bearing with an aligning ring.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Double row tapered roller bearing 11 Outer ring 11b Outer peripheral surface 12 Inner ring 13 Tapered roller 14 Cage 50 Alignment ring

Claims (1)

The outer peripheral surface of the outer ring of the double row tapered roller bearing is a spherical convex surface, and the inner peripheral surface of the alignment ring arranged outside the outer ring is a spherical concave surface corresponding to the spherical convex surface. The inner peripheral surface of the ring is a double-row tapered roller bearing with an aligning ring fitted so that the relative swing displacement between the aligning ring and the outer ring can be freely adjusted,
A double-row tapered roller bearing with an aligning ring, wherein an axial width of the aligning ring is equal to a combination width of an inner ring of the double-row tapered roller bearing and wider than an axial width of the outer ring. .

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