JP2014066273A - Radial tapered roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radial tapered roller bearing capable of using a plurality of radial tapered roller bearings while combining them in a state that spacers are not always disposed, and using the spacers of the same size in an inner ring and an outer ring in a case when the spacers are used, thus process efficiency and dimensional accuracy of the spacers can be improved, the number of components can be reduced, and adjustment of bearing clearance, and manufacturing management can be performed with high accuracy.SOLUTION: In a single row radial tapered roller bearing 1, axial widths of an inner ring 2 and an outer ring 3 are made equal to each other by disposing extending portions 2c, 3c so that end faces 2a, 3a and end faces 2b, 3b exist on the same plane orthogonal to the axial direction, at one end side and the other end side in the axial direction of the inner ring 2 and the outer ring 3. A radial tapered roller bearing set can be constituted by bringing the end faces 2b and the end faces 3b of the inner ring 2 and the outer ring 3 into closely contact with each other while opposed to each other without needing spacers.

Description

  The present invention relates to a radial tapered roller bearing and a radial tapered roller bearing set in which a plurality of these are combined.

  In general, the single-row radial tapered roller bearing 11 has a structure in which a conical roller 14 is rotatably held between raceway surfaces where an inner ring 12 and an outer ring 13 face each other as shown in FIG. And an axial load in one direction (from right to left in the figure).

  The inner ring of such single-row radial tapered roller bearings is also suitable for applications that can withstand relatively heavy loads and impact loads, and can maintain the required rigidity when subjected to loads and can be as light as possible. As described above, the axial lengths of the inner ring 12 and the outer ring 13 are merely provided with a slight margin on one side and the other side.

That is, as shown in FIG. 6, the conventional single-row radial tapered roller bearing has different inner ring width B ₂ , outer ring width C _2, and assembly width T ₂ , and the inner ring 12 and outer ring 13 have different width dimensions. The end face 12a and the end face 13a on one end side in the axial direction have a step when viewed as a plane orthogonal to the axial direction, and the other end face 12b and the end face 13b in the axial direction of the inner ring 12 and the outer ring 13 are also in the axial direction. There is a step when viewed as an orthogonal plane.

  Therefore, as shown in FIGS. 7 to 9, the radial tapered roller bearing set in which a plurality of conventional single row radial tapered roller bearings are combined has a front surface on the small diameter side of the tapered roller 14 and a front surface on the large diameter side. When the side surfaces or the back surface sides are opposed to each other, the end surfaces 12b of the inner ring 12 (FIG. 7), the end surfaces 13a of the outer ring 13 (FIG. 8), or the end surfaces of the inner ring 12 and the outer ring 13 are disposed to face each other. A plurality of types of spacers 15, 16, 17, 18 that are annular and have different widths in the axial direction are required between 12 b and the end faces 13 b (FIG. 9).

  In addition, a single-row radial tapered roller bearing is known in which an extension part is provided on the front side of the outer ring, with the small diameter side of the tapered roller as the front side, so that the raceway ring does not deform even if preload is applied. (Patent Document 1).

JP 2004-60758 A

  However, since the conventional single-row radial tapered roller bearings described above have different axial widths of the inner ring and the outer ring, the end faces on the one end side in the axial direction of the inner ring and the outer ring are positioned on a plane perpendicular to the axial direction. Are different, that is, there are steps.

  Further, a plurality of such bearings are used as a bearing set that is combined in series or in parallel, that is, as described above (see FIGS. 7, 8, and 9), the small diameter side of the tapered roller 14 is the front side, and the large diameter side is the front side. When the front side or the back side is used as the back side, the end surfaces 12b of the inner rings 12 (FIG. 7), the end surfaces 13a of the outer ring 13 (FIG. 8), or the inner ring 12 are arranged to face each other. A plurality of types of spacers 15, 16, 17, which are annular and have different axial widths, in order to fill the gaps formed between the end faces 12 b of the outer ring 13 and between the end faces 13 b (FIG. 9). 18 is required, and the number of parts required for the combined bearing set is increased.

  In addition, the axial width dimension of the annular spacer required in the above-mentioned combination differs depending on the mode of each combination, and the dimensional variation in the width processing of the spacer is directly reflected in the variation in the assembly dimension of the bearing. Therefore, there is a problem that it becomes a hindrance when it is necessary to use a set of a plurality of radial tapered roller bearings combined with high accuracy.

  In particular, in the bearing set combined as shown in FIG. 9, spacers 17 and 18 interposed between the end faces of the opposed inner and outer rings have different width dimensions, that is, spacers 17 processed individually, 18 is required, the setting of the bearing clearance has a problem that the sum of four part tolerances, ie, the difference in plane of each bearing, the inner ring spacer width, and the outer ring spacer width, occurs as variations.

  Therefore, the object of the present invention is to solve the above-described problems, and when using a plurality of radial tapered roller bearings in combination, a spacer is not necessarily required, and even if a spacer is used, the inner ring and the outer ring Radial tapered roller bearings or radial tapered roller bearing sets that can use spacers of the same size, improve the efficiency and dimensional accuracy of spacers, reduce the number of parts, and manage production of bearing gaps with high accuracy. It is to be.

  In order to solve the above-described problems, in the present invention, both end surfaces in the axial direction of the inner ring and outer ring of the radial tapered roller bearing are on the same plane orthogonal to the axial direction at one end side and the other end side, respectively. The radial tapered roller bearing is characterized in that the inner ring and the outer ring have the same axial width.

  In the radial tapered roller bearing of the present invention configured as described above, the axial widths of the inner ring and the outer ring are set equal to each other so that one end side end face in the axial direction of the inner ring and the outer ring and the other end side end face are respectively shafts. Since they are arranged on the same plane orthogonal to the direction, the end faces in the axial direction of the inner ring and the outer ring have no step at a position orthogonal to the axial direction.

  Therefore, when used as a bearing set in which a plurality of bearings are combined in series, the bearings can be aligned with their shaft centers aligned by simply combining the inner rings and the end faces of the outer rings in close contact. If a spacer is not required due to the arrangement of multiple bearings, a spacer with the same width may be interposed between the inner ring and the outer ring. Since it is not necessary to manufacture various types of spacers, the processing efficiency and dimensional accuracy of the spacers can be improved, and the number of parts can be reduced.

  A single-row radial tapered roller bearing is the most basic unit for the radial tapered roller bearing having such an operational effect. However, the same operational effect is achieved even with a double-row radial tapered roller bearing.

  When using such a radial tapered roller bearing in combination, provide a plurality of the above radial tapered roller bearings, and the small diameter side of the tapered roller is the front side and the large diameter so that these bearings share the same axis. A radial tapered roller bearing set in which the front sides or the back sides are opposed to each other with the side as the back side and the end faces of the inner rings and the outer rings are brought into close contact with each other can be obtained.

  In this way, multiple radial tapered roller bearings can share the same axis without using spacers by simply combining the end faces of the inner rings and outer rings, so the radial tapered roller bearing with fewer parts Become a set.

Also, a plurality of the radial tapered roller bearings described above are provided, and the plurality of bearings share the same axis, and the front side or the back side is opposed to each other with the small diameter side of the tapered roller as the front side and the large diameter side as the back side. In addition, the end faces of the inner rings and the outer rings may be a radial tapered roller bearing set that is integrally combined via a plurality of spacers that are annular and have the same axial width.
In this case, the annular spacers required for the both end faces of the inner ring and the outer ring only need to have the same axial width, and do not require a plurality of width dimension spacers. Reduced.

  The radial tapered roller bearing set includes a plurality of radial tapered roller bearings, and the axial directions of the plurality of bearings are arranged in parallel. The inner and outer rings of the radial tapered roller bearing set are combined. It is also possible to provide a radial tapered roller bearing set in which both end surfaces in the axial direction are arranged so as to be on the same plane perpendicular to the axial direction at one end side and the other end side.

  When the axial directions of a plurality of bearings are arranged in parallel in this way, the positions of the axial end surfaces of the inner and outer rings of all of the plurality of bearings constituting the radial tapered roller bearing set are determined with the spacer. They can be arranged on the same plane without using them.

  The present invention relates to the axial widths of the inner ring and the outer ring so that both end faces in the axial direction of the inner ring and outer ring of the radial tapered roller bearing are on the same plane orthogonal to the axial direction at one end side and the other end side, respectively. Therefore, when using a combination of multiple radial tapered roller bearings, a spacer is not necessarily required.When using a spacer, only use a spacer with the same dimensions for the inner ring and the outer ring. Therefore, there is an advantage that the radial tapered roller bearing can improve the efficiency of processing of the spacer, improve the dimensional accuracy of the radial tapered roller bearing set, reduce the number of parts, and manufacture and control a highly accurate bearing gap.

  A radial tapered roller bearing set using such a radial tapered roller bearing, in which the small diameter side of the tapered roller is the front side, the front sides or the back sides are opposed to each other, and the end faces of the inner rings and the outer rings are brought into close contact with each other. In the invention, as described above, there are the advantages that the number of parts can be reduced and the production management of the bearing gap can be performed with high accuracy.

  Further, the invention of a radial tapered roller bearing set in which front sides or back sides are opposed to each other and end faces of inner rings and outer rings are integrally combined via a plurality of spacers having annular and equal axial widths. Therefore, spacers formed with multiple widths are not required, and it is only necessary to use spacers of the same width but with different diameters. There is an advantage that the number of points is reduced.

  Further, in the invention of the radial tapered roller bearing set in which the axial directions of a plurality of bearings are arranged in parallel, the positions of the axial end faces of the inner and outer rings of all the radial tapered roller bearings used in the configuration are Can be arranged on the same plane without using any of the above, and there is an advantage that the number of parts can be reduced and the production management of the bearing gap can be performed with high accuracy.

Radial direction sectional view showing a single row radial tapered roller bearing of a 1st embodiment Radial direction sectional view of radial tapered roller bearing set of a 2nd embodiment Radial direction sectional view of radial tapered roller bearing set of a 3rd embodiment Radial direction sectional view of radial tapered roller bearing set of a 4th embodiment Radial direction sectional view of radial tapered roller bearing set of a 5th embodiment Radial direction sectional view showing a single row radial tapered roller bearing of the first conventional example Radial sectional view of radial tapered roller bearing set of second conventional example Radial sectional view of the third conventional radial tapered roller bearing set Radial sectional view of the fourth conventional radial tapered roller bearing set

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, a single-row radial tapered roller bearing 1 according to a first embodiment of the present invention includes end faces 2a and 3a on one end side and the other end side in the axial direction of an inner ring 2 and an outer ring 3 of a radial tapered roller bearing. Extension portions 2c and 3c not provided in the conventional isomorphous bearing (see FIG. 6) are provided so that the end faces 2b and 3b are on the same plane orthogonal to the axial direction, thereby increasing the axial width of the inner ring 2 and the outer ring 3. Equally provided. In addition, the code | symbol 7 in a figure has shown the holder | retainer.

  That is, in order to provide the axial widths of the inner ring 2 and the outer ring 3 equally, an extension portion 2c having a predetermined width is provided in the axial direction on the front side peripheral edge of the inner ring 2 with the small diameter side of the tapered roller 4 as the front side. An extension 3c having a predetermined width is provided in the axial direction on the rear side periphery.

Thus, the inner ring width B ₁ , the outer ring width C ₁ and the assembly width T ₁ of the single row radial tapered roller bearing are all the same, and there is no axial step between the both end surfaces of the inner ring 2 and the outer ring 3 of the bearing. Disappear.

  Further, in the second embodiment shown in FIG. 2, two single-row radial tapered roller bearings 1 of the first embodiment are used and arranged in series so that the radial tapered roller bearings share the same axis, that is, A radial cone in which the small-diameter side of the tapered roller 4 is opposed to the front side, the front sides are opposed to each other, and the end faces 2b and the end faces 3b of the inner ring 2 and the outer ring 3 are opposed to each other without requiring a spacer. It can be set as a roller bearing set.

  That is, in the second embodiment shown in FIG. 2, the spacers 15, 16, 17, and 18 required in the conventional radial tapered roller bearing set shown in FIGS. The radial tapered roller bearing set combined with each other reduces the number of components and the variation in the sum of component tolerances, and the mating surface of the combined single row radial tapered roller bearing 1 (the end surface of FIG. 2). 2b, 3b) By simply managing and adjusting the plane difference on the side, the desired bearing clearance can be obtained in the state where it is attached to the housing or the like while adjusting the tightening amount in the axial direction with respect to the inner ring 2 or the outer ring 3. It becomes a radial tapered roller bearing set that can be mounted with high precision.

Further, in the third embodiment shown in FIG. 3, the two radial tapered roller bearings 1 of the first embodiment are arranged in series so as to share the same axis, that is, the large diameter side of the tapered roller 4 is arranged on the back surface. A radial tapered roller bearing set in which the back surfaces are opposed to each other and the end faces 2a, 2a of the inner ring 2 and the outer ring 3 are in close contact with each other and 3a, 3a are in close contact with each other.
In this case as well, the same advantageous effects of reducing the number of parts and assembling with high dimensional accuracy can be obtained as in the second embodiment.

  Further, in the fourth embodiment as shown in FIG. 4, the front sides of the two single-row radial tapered roller bearings 1 are opposed to each other, and the end surfaces 2 b and 2 b of the inner ring 2 and the end surfaces 3 b and 3 b of the outer ring 3 are connected to each other. The radial tapered roller bearing set is in close contact with each other via two annular spacers 5 and 6 having equal axial widths (thicknesses).

  In the fourth embodiment, since the spacers 5 and 6 having different diameters are formed with a single predetermined width, the radial tapered roller bearing can set the axial width and the bearing gap after assembly with high accuracy. As a set, it is possible to improve the processing efficiency of the spacer, manufacture and control the bearing gap with high precision, and reduce the number of parts.

  In addition, by simultaneously grinding and finishing the end faces of the plurality of spacers 5 and 6 used in the radial tapered roller bearing set, the processing efficiency for eliminating the difference in the axial width dimension of the spacers 5 and 6 is high. Therefore, it is possible to adjust and set the assembly width and the bearing gap with high accuracy.

  Further, the fifth embodiment shown in FIG. 5 uses two single-row radial tapered roller bearings 1 of the first embodiment, the axial directions thereof are arranged in parallel, and the outer peripheral surfaces of the outer ring 3 are directly overlapped with each other. And a radial tapered roller bearing set in which both end surfaces in the axial direction of the outer ring 3 are arranged and combined so as to be on the same plane perpendicular to the axial direction at one end side and the other end side.

  By thus combining the single-row radial tapered roller bearings 1 of the first embodiment in parallel, the positions of the end faces in the axial direction of the inner ring 2 and the outer ring 3 are arranged on the same plane without using a spacer. Therefore, the number of parts is reduced, and the variation of the sum of the part tolerances is thereby reduced, thereby providing a radial tapered roller bearing set that can be assembled with high accuracy.

1, 11 Single-row radial tapered roller bearings 2, 12 Inner ring 3, 13 Outer rings 2a, 2b, 3a, 3b End face 2c, 3c Extensions 4, 14 Tapered rollers 5, 6, 15, 16, 17, 18 Spacer 7 Holding vessel

Claims (5)

  The axial widths of the inner ring and the outer ring are set to be equal so that both end faces in the axial direction of the inner and outer rings of the radial tapered roller bearing are on the same plane perpendicular to the axial direction at one end and the other end. Radial tapered roller bearing characterized by.   The radial tapered roller bearing according to claim 1, wherein the radial tapered roller bearing is a single-row radial tapered roller bearing.   A plurality of radial tapered roller bearings according to claim 1 or 2 are provided, and these bearings share the same axis, and the front side or the back side of the tapered rollers with the smaller diameter side as the front side and the larger diameter side as the back side. A radial tapered roller bearing set composed of a combination of inner rings and end faces of inner rings and outer rings in close contact with each other.   A plurality of radial tapered roller bearings according to claim 1 or 2 are provided, and the plurality of bearings share the same axis, and the tapered rollers have a small diameter side as a front side and a large diameter side as a back side. A radial tapered roller bearing set in which end faces of inner rings and outer rings are integrally combined with each other via a plurality of spacers having an annular width and the same axial width.   3. A plurality of radial tapered roller bearings according to claim 1 or 2, comprising a radial tapered roller bearing set in which the axial directions of the plurality of bearings are arranged in parallel, and all inner rings of the radial tapered roller bearing set. And a radial tapered roller bearing set in which both end surfaces in the axial direction of the outer ring are arranged so as to be on the same plane perpendicular to the axial direction at one end side and the other end side.

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