JP2538769Y2 - Rolling bearing with alignment ring - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to a rolling bearing with an aligning ring used for a rolling roll in a steel casting process.

[Conventional technology]

Rolling roll bearings in the steel casting process need to be aligned, and have to allow axial expansion, because the shaft has large deflection. Therefore, as shown in FIG. 5, one end of the rolling roll has an inner ring (1) having no shoulder on the raceway surface, an outer ring (2) having a spherical portion on the outer diameter, and inner and outer rings (1) (2). A) a rolling element (4) which is equally arranged via a retainer (3), and an aligning ring (5) which fits and supports the outer spherical surface portion of the outer ring (2) so as to be able to align. Rolling bearing with free centering ring (A)
6, and the other end has the same structure as that of FIG. 5 except that an inner ring (1 ') having a shoulder on the raceway surface is used as shown in FIG. (B) is used. Rolling bearings with centering rings as described above (A) (B)
Conventionally, in order to incorporate the outer ring (2) into the aligning ring (5), as shown in FIG. 5 and FIG. A notch (6) for outer ring insertion extending to the portion is formed. This notch (6) is the outer ring (2)
The centering ring (5) is formed at two positions (180 ° opposed positions) with a width slightly larger than the width in the axial direction. The outer ring (2) and the aligning ring (5) are assembled by aligning the outer ring (2) with the axis of the outer ring (2) orthogonal to the axis of the aligning ring (5). Alignment ring (5) from notch (6) of ring (5)
Of the outer ring (2) and the aligning ring (5) at that position by rotating the outer ring (2) and the aligning ring (5) relatively by 90 ° so that the axes are aligned.

[Problems to be solved by the invention]

When incorporating the above-mentioned rolling bearings (A) and (B) with an aligning ring into a rolling roll in a steel continuous casting process, the position of the notch (6) of the aligning ring (5) should be 90 degrees with respect to the load area. The bearing is of this type, but in this type of bearing, the inner ring (1) is used as the rotating side and the outer ring (2) is used as the fixed side,
In addition, since the inner and outer rings (1) and (2) are clearance-fitted, creep occurs in the inner ring (1) and the alignment ring (5). And
Due to this creep, the position of the notch (6) of the aligning ring (5) may move to the load region. In such a case,
Cracks sometimes occurred starting from the corner (6a) of the notch (6).

Further, since no load is applied to the notch (6), an excessive load, vibration, or the like causes the stepped wear portion (7) to be formed on the outer diameter spherical portion of the outer ring (2) as shown in FIG. ) May occur, and in such a case, the aligning function is lost, which is one cause of breakage.

Accordingly, an object of the present invention is to provide a centering ring that does not require a notch for inserting an outer ring and that can be easily incorporated into a bearing housing or the like.

[Means for solving the problem]

This invention has a structure in which the aligning ring is divided by an axial dividing surface, an annular groove is formed in both end surfaces on the outer diameter side of the divided aligning ring, and an annular retaining ring is formed in the annular groove in the aligning ring. The above-mentioned problem has been solved by integrally fitting so as not to exceed the outer diameter of.

[Action]

The aligning ring has a structure divided in advance in the axial division surface.When the outer ring is assembled, the divided state of the aligning ring is applied to the outer periphery of the outer ring from the outside to match the axial division surface. In this case, the annular retaining ring is integrally fitted to the alignment ring to integrate the alignment ring.

Therefore, the notch for outer ring insertion is unnecessary for the aligning ring,
Even if the outer ring swings in the axial direction with respect to the aligning ring to perform the aligning operation due to load fluctuation, vibration, or the like acting on the bearing, it is possible to prevent the occurrence of cracks and stepped wear. Also, even if the split surface moves to the load region due to the creep of the aligning ring, since the split surface is formed in the axial direction, there is a discrepancy with respect to the axial swing motion of the outer ring. Since there is no oil film breakage, smooth centering operation is guaranteed. In addition, an annular groove is formed on both end surfaces on the outer diameter side of the divided aligning ring, and an annular retaining ring is integrally fitted into this annular groove so as not to exceed the outer diameter of the aligning ring. Incorporation into a bearing housing or the like becomes easy.

〔Example〕

FIG. 1 shows one embodiment of the present invention, wherein (1) is an inner ring, (2) is an outer ring having an outer spherical surface, (3) is a cage, and (4) is an inner and outer ring (1) ( 2) Rollers which are equally arranged via a retainer (3) between them are shown, and since they have the same configuration as the conventional one, their description is omitted.

According to the present invention, an alignment ring (10) having an inner diameter spherical portion for fittingly supporting the outer diameter spherical portion of the outer ring (2) so as to be capable of centering operation is formed by a second method.
As shown in the figure, a semicircular divided piece (10
a) (10b), and these are integrated by annular retaining rings (11) and (11).

A method of dividing the aligning ring (10) is to divide the dividing planes (10c) and (10c) in parallel with the axial direction by a known natural dividing division and other cutting divisions. In order to prevent the misalignment of 10c) and to prevent the generation of the gap between the mating surfaces, it is preferable to adopt the natural splitting.

The natural splitting means that a notch groove having a V-shaped cross section running in the axial direction of the ring is formed at two places on the diameter line of the ring, and a wedge having a wedge angle larger than the notch angle of the V-shaped notch groove. The tool is brought into contact with two notch grooves on the diameter line of the ring, and a breaking load is applied to the tool in the radial direction of the ring to break the ring along the notch groove. is there.

The annular retaining rings (11) and (11) are press-fitted or shrink-fitted to the outer peripheral portion of the alignment ring (10), and as shown in FIG. It is sufficient to form the annular grooves (12) and (12) in the annular groove, and to fit the annular grooves (12) and (12) integrally.

The radial depth of the annular grooves (12) and (12) is slightly larger than the radial thickness of the annular retaining rings (11) and (11), and the aligning ring (10) is inserted into and removed from a bearing box or the like. In the case, the retaining ring (11)
It is desirable that (11) does not interfere.

Also, as shown in FIG. 3, the annular grooves (12) and (12)
It is more preferable to form a tapered annular groove (12a) (12a) having a retaining slope (α) at the bottom of the groove. In this case, the same gradient is applied to the inner diameter surfaces of the retaining rings (11) and (11). Also, it is desirable that the retaining rings (11) and (11) be slightly smaller than the axial width of the annular grooves (12) and (12) so as not to protrude from the end face of the alignment ring (10). .

As shown in FIG. 4, the means for integrating the aligning ring (10) is provided with stepped annular grooves (12) on both outer side surfaces of the aligning ring (10).
b) Form (12b), insert a steel retaining ring (11a) (11a) made of steel plate equivalent to SPCC material, press the roller from the outer circumference side and fix it by crimping by rolling. Good.

The means for fixing the retaining rings (11) and (11a) to the alignment ring (10) may be implemented by a method other than the above-described press-fitting, shrink fitting, and rolling caulking.

In any of the embodiments, when the outer ring (2) is assembled, the aligning ring (10) is in a divided state, and after the outer ring (2) is assembled, the retaining rings (11) and (11a) are fitted and integrated. It is to make it.

Although the drawing illustrates a case having the retainer (3), it can be applied to a full-roller type.

[Effect of the invention]

According to the present invention, the notch for inserting the outer ring from the aligning ring can be eliminated, the life of the bearing can be improved, and a smooth aligning operation can be maintained. Also, annular grooves are formed on both outer diameter side surfaces of the divided alignment ring,
Since the annular retaining ring is integrally fitted into the annular groove so as not to exceed the outer diameter of the aligning ring, it can be easily incorporated into a bearing housing or the like.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of an upper half of a rolling bearing with an aligning ring showing one embodiment of the present invention, FIG. 2 is a front view of the aligning ring alone of FIG. 1, and FIGS. FIG. 5 is a sectional view of a main part of a conventional rolling bearing with a centering ring, and FIG. 5 is a front view of the right half of the bearing shown in FIG. 5, and FIG. 8 is a partial longitudinal side view exaggeratingly showing a state in which the outer diameter surface of the conventional bearing outer ring has worn out. (1) ... inner ring, (2) ... outer ring, (4) ... rolling element,
(10)… Alignment ring, (10a) (10b)… Semicircular split piece,
(11) (11a) ... annular retaining ring, (12) (12a) (12
b) An annular groove.

Claims (1)

(57) [Scope of request for utility model registration] An inner ring, an outer ring having an outer spherical surface portion, a rolling element disposed between the inner and outer rings, and an aligning ring for fittingly supporting the outer spherical surface portion of the outer ring so as to be able to perform an aligning operation. In a rolling bearing with an aligning ring, the aligning ring has a structure in which the aligning ring is divided by an axial dividing surface, and annular grooves are formed on both outer side surfaces of the divided aligning ring, and an annular retaining ring is formed in the annular groove. A rolling bearing with an aligning ring, wherein the rolling bearings are integrally fitted so as not to exceed the outer diameter of the aligning ring.