JP2006336751A - Assembling method and assembling device of self-aligning roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fully automate an assembling operation by realizing an assembling method and an assembling device capable of preventing a part of barrel rollers 4, 4 from being interfered with the opening end edge part of an outer ring 2 even if the barrel rollers 4, 4 are not supported manually. <P>SOLUTION: First, as shown in (A), an inner ring assembly 13 is inserted into the outer ring 2 until the center axes of the inner ring assembly 13 and the outer ring 2 cross perpendicularly to each other at the portion of the center of curvature of an outer ring route 6. The outer ring 2 is put on a pedestal 15 having a spherical recessed part 18. In this state, the inner ring assembly 13 is swung in the order of (A), (B), and (C) while guiding the spherical rollers 4, 4 forming the inner ring assembly 13 by a spherical recessed surface 19 for guiding which is the inner surface of the spherical recessed part 18 to substantially align the center axis O<SB>13</SB>of the inner ring assembly 13 with the center axis O<SB>2</SB>of the outer ring 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement in an assembling method and an assembling apparatus for a self-aligning roller bearing that is incorporated in various mechanical devices and supports a rotating shaft inside a housing, for example.

  For example, a self-aligning roller bearing as described in Patent Document 1 has been conventionally used to rotatably support a heavy shaft inside a housing. 3 to 4 show a self-aligning roller bearing 1 which has been widely known in the past, as described in Patent Document 1. The self-aligning roller bearing 1 includes a plurality of spherical rollers 4 and 4 arranged in a freely rollable manner between an outer ring 2 and an inner ring 3 that are concentrically combined with each other. A pair of cages 5 and 5 prevent separation of the plurality of spherical rollers 4 and 4.

  An outer ring raceway 6 that is a spherical concave surface having a single center is formed on the inner peripheral surface of the outer ring 2. Also, a pair of inner ring raceways 7 and 7 are formed on both sides of the outer peripheral surface of the inner ring 3 in the width direction (left and right direction in FIG. 3) so as to face the outer ring raceway 6. The plurality of spherical rollers 4 and 4 have a symmetrical shape in which the maximum diameter portion is at the center of the axial length of each spherical roller 4 and 4, and the outer ring raceway 6 and the pair of inner ring raceways 7, 7 is arranged so as to be freely rollable in two rows.

  In both the cages 5 and 5, a plurality of pockets 9 for holding the spherical rollers 4 and 4 so as to be freely rollable are formed at equal intervals in the circumferential direction in a conical cylindrical main portion 8. is doing. The main portion 8 is disposed radially inside the pitch circle diameter of the spherical rollers 4 and 4, and the width of the pockets 9 in the circumferential direction of the main portion 8 is set so that the spherical rollers 4 4 is smaller than the outer diameter. Therefore, the spherical rollers 4 and 4 held in the pockets 9 do not come out to the inner diameter side of the cages 5 and 5. Further, an outward flange portion 10 is formed at the large-diameter end edge portion of the main portion 8, and the metal plate is bent outward in the radial direction. And the elastic tongue piece 11 formed in the state which protrudes radially inward in the position equivalent to the circumferential direction intermediate part of each said pocket 9 in the inner peripheral part of this outward flange part 10 is each said spherical roller. 4, 4 and 4 are engaged with circular recesses 12 formed at the center of both end faces in the axial direction. Due to the engagement between the elastic tongue 11 and the recess 12, the spherical rollers 4, 4 can be incorporated into the pockets 9 from the outside in the radial direction of the main portion 8. The spherical rollers 4 and 4 are prevented from coming out to the outer diameter side of the cages 5 and 5.

  For example, when the rotating shaft is supported inside the housing by the self-aligning roller bearing 1 configured as described above, the outer ring 2 is fitted and fixed to the housing, and the inner ring 3 is fitted and fixed to the rotating shaft. When the inner ring 3 rotates together with the rotation shaft, the plurality of spherical rollers 4 and 4 roll to allow this rotation. If the shaft center of the housing and the shaft center of the rotary shaft do not match, the inner ring 3 is aligned inside the outer ring 2 (the central axis of the inner ring 3 is inclined with respect to the central axis of the outer ring 2). Compensate for discrepancies. In this case, since the outer ring raceway 6 is formed in a single spherical shape, the rolling of the plurality of spherical rollers 4 and 4 is performed smoothly even after the mismatch compensation.

The process of assembling the self-aligning roller bearing 1 configured and acting as described above is described in Patent Document 2, for example. When the self-aligning roller bearing 1 is assembled, first, an inner ring assembly 13 as shown in FIG. 5 is assembled outside the outer ring 2. The inner ring assembly 13 is formed by assembling a plurality of spherical rollers 4 and 4 together with a pair of cages 5 and 5 around the inner ring 3. Since the outer diameter D 13 of such an inner ring assembly ₁₃ is larger than the inner diameter R ₂ of the opening of the outer ring 2 (D ₁₃ > R ₂ ), it cannot be inserted inside the outer ring 2 as it is. Therefore, as described in Patent Document 2, as shown in FIG. 6, the outer ring 2 is pressed radially inward from the opposite side in the diametrical direction to elastically deform the outer ring 2 into an elliptical shape. The major axis of the ellipse is made larger than the outer diameter of the inner ring assembly 13. Then, substantially in this state, as shown in Figures 5-6, the inner ring assembly 13 to the inside of the outer ring 2, the the central axis O ₁₃ of the inner ring assembly 13 and the central axis O ₂ of the outer ring 2 In a state where they are orthogonally crossed, the center of curvature of the outer ring raceway is inserted so as to be positioned on the central axis O ₁₃ of the inner ring assembly 13. After the insertion, the force pressing the outer ring 2 from the opposite side in the radial direction is released, and the outer ring 2 is restored to a circular shape.

The inner ring assembly 13 is inserted into the outer ring 2 by holding the spherical rollers 4 and 4 in the pockets 9 and 9 of a part of the retainers 5 and 5 (both left and right ends in FIG. 5). In some cases, the diameter of the inner ring assembly 13 is suppressed to be equal to or smaller than the inner diameter of the opening of the outer ring 2. The operation of assembling each of the spherical rollers 4 and 4 into the partial pockets 9 and 9 is performed by rotating the inner ring assembly 13 about its own central axis O ₁₃ after the insertion operation. This is performed in a state where the pockets 9 and 9 are exposed to the outside of the outer ring 2.

Even when the inner ring assembly 13 is inserted into the outer ring 2 by any of the methods described above, the central axes O ₂ and O ₁₃ of the outer ring 2 and the inner ring assembly 13 have the curvature of the outer ring raceway 6. After being inserted in a state of being substantially orthogonal on the center, an assembling operation called a so-called return operation is performed in which both the central axes O ₂ and O ₁₃ coincide with each other. That is, the inner ring assembly 13 is swung substantially 90 degrees around the diameter direction of the inner ring assembly 13 and the outer ring 2, and as shown in FIGS. Is incorporated inside the outer ring 2. Such a return work procedure is described in Patent Document 3, for example.

  FIG. 7 shows the procedure of the returning operation described in Patent Document 3 to be performed for assembling the inner ring assembly 13 inside the outer ring 2. This returning operation is performed in a state where the central axis of the outer ring 2 is arranged in a substantially horizontal direction. Then, among the plurality of spherical rollers 4 and 4 constituting the inner ring assembly 13, the spherical rollers 4 and 4 existing on the lower side are lightly pushed upward by a hand 14, while the central axis of the inner ring assembly 13 and the above-mentioned The inner ring assembly 13 is oscillated and displaced with respect to the outer ring 2 in a direction that coincides with the central axis of the outer ring 2. The reason why this swing displacement is performed while pushing up the spherical rollers 4, 4 existing on the lower side is that the end surface outer diameter portion of each of the spherical rollers 4, 4 and the end surface inner diameter portion of the outer ring 2 are close to each other. This is to prevent interference as shown in FIG.

  That is, the spherical rollers 4 and 4 held in the pockets 9 and 9 of the cages 5 and 5 are prevented from coming out to the outer diameter side of the cages 5 by the structure as described above. However, before assembling the outer ring 2 around, it is unavoidable that the outer ring 2 is displaced to some extent radially outward. Therefore, unless the above-described returning operation is performed while pushing up the lower spherical rollers 4 and 4 as shown in FIG. 7, each of these spherical rollers 4 and 4 as shown in FIG. The portion near the outer diameter of the end surface interferes with the portion near the inner diameter of the end surface of the outer ring 2. In this state, the inner ring assembly 13 cannot be assembled inside the outer ring 2. When performing the above-described return operation, there is such a problem, and therefore the entire assembly process of the self-aligning roller bearing cannot be automated including this return operation.

Japanese Patent No. 3529191 JP 54-27644 A Japanese Patent Laid-Open No. 11-42521

  In view of the circumstances as described above, the present invention provides a self-aligning roller bearing assembly method capable of preventing interference between a part of the spherical roller and the opening edge of the outer ring without manually supporting the spherical roller. Invented to realize the assembly apparatus.

  The self-aligning roller bearing that is the subject of the present invention is an outer ring in which an outer ring raceway that is a spherical concave surface is formed on the inner peripheral surface, and the outer ring raceway, as in the previously known self-aligning roller bearings. An inner ring having a pair of opposed inner ring raceways formed on the outer peripheral surface, a plurality of spherical rollers provided between the outer ring raceway and the inner ring raceway so as to roll in two rows, and each of these spherical rollers And a holder having a plurality of pockets for holding the roll freely.

The invention of the method of assembling a self-aligning roller bearing according to claim 1 is a combination of the inner ring, the spherical rollers, and the cage in advance in order to assemble the self-aligning roller bearing as described above. The inner ring assembly is inserted inside the outer ring until the central axis of the inner ring assembly and the central axis of the outer ring are substantially perpendicular to each other at the center of curvature of the outer ring raceway. The solid body is swung substantially 90 degrees around the diameter direction of the inner ring assembly and the outer ring, and the inner ring assembly is incorporated inside the outer ring.
In particular, in the method of assembling the self-aligning roller bearing according to claim 1, the inner ring assembly is placed inside the outer ring, and the central axes of the inner ring assembly and the outer ring are curved with the curvature of the outer ring raceway. The outer ring is inserted into a substantially orthogonal state at the central portion, and the outer ring is placed on a pedestal having a spherical recess. Next, in this state, the spherical rollers constituting the inner ring assembly are guided by the guiding spherical concave surface which is the inner surface of the spherical concave portion, and the inner ring assembly is swung around the diametrical direction. The central axis of the inner ring assembly and the central axis of the outer ring are substantially matched.
The state of being substantially orthogonal at the center of curvature of the outer ring raceway does not have to be strictly orthogonal, but the inner ring assembly can be inserted inside the outer ring, and after the insertion, In this state, the inner ring assembly can be swung. Further, to substantially match the central axes of the outer ring and the inner ring assembly does not need to be strictly matched, but it means a state that can function as a completed self-aligning roller bearing. This is the same throughout the specification and claims.

  The self-aligning roller bearing assembly apparatus according to claim 4 includes a pedestal and a swing arm. Of these, the pedestal has a spherical concave portion on which the outer ring can be placed and whose inner surface is a spherical concave surface for guidance. The spherical recess is a part of the inner ring assembly in a state where the inner ring assembly is inserted inside the outer ring and the center axes of the inner ring assembly are substantially orthogonal to each other at the center of curvature of the outer ring raceway. To enter. Then, as the inner ring assembly swings around the diametrical direction, the spherical rollers constituting the inner ring assembly are guided to the inner side of the outer ring raceway. The swing arm is provided at a portion facing the opening of the spherical recess in the vicinity of the pedestal. The swing arm is displaced about the diameter direction of the inner ring assembly and the outer ring, and the inner ring assembly is moved. Rock.

According to the assembling method and the assembling apparatus of the self-aligning roller bearing of the present invention configured as described above, the spherical spherical surface for guiding which is the inner surface of the spherical concave portion is replaced by the spherical rollers constituting the inner ring assembly. It is prevented from being displaced radially outward. Accordingly, when the inner ring assembly is pivoted substantially 90 degrees from the state in which the central axis of the inner ring assembly and the central axis of the outer ring are substantially orthogonal at the center of curvature of the outer ring raceway, In particular, even if the spherical rollers are not supported manually, the inner ring assembly can be incorporated inside the outer ring.
For this reason, it is possible to automate the entire assembly process of the self-aligning roller bearing including the above-described returning operation.

In order to implement the invention described in claim 1, preferably, as described in claim 2, the guide spherical concave surface provided on the pedestal has a shape having a curvature radius substantially the same as that of the outer ring raceway. Then, with the outer ring placed on the pedestal, the center of curvature of the outer ring raceway substantially coincides with the center of curvature of the guiding spherical concave surface. In this case, substantially matching does not need to be strictly matched, but the chamfer dimension formed on the outer peripheral edge of the axial end surface of each spherical roller held in the pocket of the cage, etc. In relation, it means a state where these spherical rollers are made to coincide with each other to the extent that they can be guided inside the outer ring raceway.
By adopting such a configuration, the returning operation for feeding the spherical rollers into the outer ring raceway can be performed more smoothly.

Preferably, when the invention described in claims 1 and 2 is carried out, as described in claim 3, the inner ring assembly is swung substantially 90 degrees around the diameter direction of the inner ring assembly and the outer ring. When moving, the pedestal is swung or rotated about the central axis of the outer ring placed on the pedestal.
With this configuration, the inner ring assembly is substantially rotated by 90 degrees from the state in which the central axis of the inner ring assembly and the central axis of the outer ring are substantially orthogonal at the center of curvature of the outer ring raceway. The return work can be performed more smoothly.
That is, as the pedestal is swung or rotated, the inner ring assembly and the outer ring vibrate, and the positional relationship between the spherical rollers and the outer ring that are in contact with each other during the returning operation becomes unstable. (It becomes difficult to maintain the positional relationship at each moment.) For this reason, even if the axial end edge of one of the spherical rollers and the opening peripheral edge of the outer ring are caught in the middle of the returning operation, the caught state is immediately resolved without being stabilized, and the spherical roller is removed. You can get inside the outer ring raceway. Further, even after each spherical roller enters the inside of the outer ring raceway, the friction acting between the rolling surface of each spherical roller and the outer ring raceway can be kept small. For this reason, the inner ring assembly can be incorporated inside the outer ring without causing damage such as scratches on the rolling surfaces and the outer ring raceway.

  1 and 2 show an embodiment of the present invention. The self-aligning roller bearing assembly apparatus used in this embodiment includes a pedestal 15, a swing arm 16, and holding jigs 17 and 17. The pedestal 15 is made of a metal such as stainless steel or a synthetic resin such as polyamide resin or polyacetal resin, and is supported and fixed on the upper surface of a swivel base (not shown). The swivel base rotates about a rotation center axis arranged in the vertical direction, and the pedestal 15 is arranged concentrically with the rotation center axis. The pedestal 15 has an outer ring 2 constituting the self-aligning roller bearing 1 mounted on the upper surface thereof, and has a spherical recess 18 opened on the upper surface. The spherical concave portion 18 is provided with a spherical concave surface 19 for guide having a point on the rotation center axis as a center of curvature, and a concave portion radially outward (downward) from the spherical concave surface 19 for guide. And a recess 20 for draining oil. Further, the spherical concave surface 19 for guide has substantially the same radius of curvature as the outer ring raceway 6 formed on the inner peripheral surface of the outer ring 2. In the state where the outer ring 2 is placed on the pedestal 15, the center of curvature of the outer ring raceway 6 and the center of curvature of the spherical concave surface 19 for guidance substantially coincide.

  Further, the base end portion (upper end portion in FIG. 1) of the swing arm 16 is coupled and fixed at a position deviating from the center of rotation on the front surface of the output board 22 of the rotary actuator 21. The output board 22 swings and displaces around a rotation center axis arranged in the horizontal direction, and the height position of the rotation center axis is the above-described state when the output board 22 is placed on the upper surface of the pedestal 15. It substantially matches the position of the center of curvature of the outer ring raceway 6 (as much as possible excluding errors). Further, the tip of the swing arm 16 is either spherical roller constituting the inner ring assembly 13 inserted inside the outer ring 2 above the outer ring 2 placed on the upper surface of the pedestal 15. It exists in the position which can be engaged with (abutted on) the axial direction end surface of 4 freely.

  Further, the holding jigs 17 and 17 are supported and fixed concentrically to the tip of the output rod 24 of the direct acting actuator 23 such as an air cylinder provided concentrically with each other facing each other. ing. Such both holding jigs 17, 17 hold the outer ring 2 from the opposite side in the diameter direction in a state where they are close to each other as the both actuators 23 are extended. The outer ring 2 is supported above the pedestal 15 so as to be concentric with the guiding spherical concave surface 19.

  In the case of this embodiment, the inner ring assembly 13 is inserted inside the outer ring 2 to the state shown in FIG. 2A, and the inner ring assembly 13 is inserted into the figure. It is premised on that the return work step of swinging to the state shown in (C) of 2 is performed on separate stages. However, it is possible to perform these two steps on the same stage. In this case, as the both actuators 23, those that can obtain a large pressing force such as a hydraulic cylinder, a feed screw mechanism, etc. are used. It can be transformed into an ellipse. Then, after the insertion operation step is performed in a state where the outer ring 2 is deformed into an elliptical shape, the force with which the actuators 23 press the outer ring 2 (the outer ring 2 is not deformed but can be positioned). The above-mentioned returning work process is performed after weakening.

In any case, when the inner ring assembly 13 is inserted into the inner side of the outer ring 2 placed on the upper surface of the pedestal 15, the lower half of the spherical rollers 4, 4 constituting the inner ring assembly 13. The rolling surfaces of the spherical rollers 4 and 4 existing in the part abut against the guide spherical concave surface 19. Then, in the starting state of the flashing operation, the central axis O ₂ of the center axis O ₁₃ and the outer ring 2 of the inner ring assembly 13, with the center of curvature O ₆ parts of the outer ring raceway 6 of the inner peripheral surface of the outer ring 2 Substantially orthogonal. In the start state, the tip of the swing arm 16 is present on the side of the upper end of the inner ring assembly 13 as shown in FIG.

  As shown in FIG. 2A, if the inner ring assembly 13 is inserted into the inner side of the outer ring 2 placed on the upper surface of the pedestal 15, the swing arm 16 stopped until then is From the state shown in FIG. 2A, the rocking displacement is made counterclockwise. Then, the inner ring assembly 13 is oscillated and displaced about the diametrical direction of the inner ring assembly 13 and the outer ring 2 in the order shown in FIGS. 2 (A) → (B) → (C). The inner ring assembly 13 is incorporated inside the outer ring 2 along with the swing displacement.

  As shown in FIGS. 2 (A) → (B) → (C), each of the spherical rollers 4 constituting the inner ring assembly 13 in the process of incorporating the inner ring assembly 13 into the inner side of the outer ring 2. 4 enters the inside of the outer ring raceway 6 while being guided by the guide spherical concave surface 19. There is a minute step based on an unavoidable error between the upper end opening edge of the guide spherical concave surface 19 and the lower end opening edge of the outer ring raceway 6. Based on the presence of chamfering in the part, each of these spherical rollers 4, 4 enters the outer ring raceway 6 without difficulty. Moreover, in the case of the present embodiment, the inner ring assembly 13 and the outer ring 2 vibrate as the pedestal 15 is rotated. Accordingly, the positional relationship between the spherical rollers 4 and 4 and the outer ring 2 that are in contact with each other in the course of the above-described returning operation becomes unstable, and in the middle of this returning operation, the axial end edge of any of the spherical rollers 4 Even if the outer periphery of the outer ring 2 is caught, the hooked state is immediately resolved without being stabilized. For this reason, the spherical roller 4 can enter inside the outer ring raceway 6. Further, even after the spherical rollers 4 and 4 enter the inside of the outer ring raceway 6, the friction acting between the rolling surfaces of the spherical rollers 4 and 4 and the outer ring raceway 6 is kept small. It is done. Therefore, the inner ring assembly 13 can be incorporated inside the outer ring 2 without causing damage such as scratches on the rolling surfaces and the outer ring raceway 6. The reason for rotating the pedestal 15 is to destabilize the positional relationship between the spherical rollers 4 and 4 and the outer ring 2, so that the pedestal 15 is vibrated by a vibrator or the like without rotating the pedestal 15. You may let them.

  In the case of the illustrated embodiment, the bottom of the spherical recess 18 is provided with an oil draining recess 20 that is recessed radially outward from the guiding spherical concave surface 19. It is possible to prevent the oil existing in 18 from staying on the guide spherical concave surface 19. However, along with the provision of the recess 20, in the initial stage of the returning operation, the outer peripheral edge of the axial end surface of a part of the spherical rollers 4 facing the recess 20 and the opening periphery of the recess 20 May be caught. For this reason, in the case of the present embodiment, the pedestal 15 is rotated about the central axis of the outer ring 2 so that the part of the spherical rollers 4 rides on the guiding spherical concave surface 19 without difficulty. Like. In addition, if chamfering is performed on the peripheral edge of the opening of the concave portion 20, the partial spherical rollers 4 can be smoothly run on the guiding spherical concave surface 19.

  Note that the rocking speed of the inner ring assembly 13 by the rocking arm 16 and the rotation speed of the pedestal 15 during the above-described returning operation are centrifugal, which are harmful to the returning operation as the rocking and rotating. Set to an appropriate value that does not generate force. Such an appropriate value is obtained by calculation or experiment. For example, in the case of a self-aligning roller bearing for an industrial machine such as a rolling mill, about 90 degrees / 3 to 4 seconds is appropriate for the swing speed. The rotational speed of the spherical rollers 4, 4 can be kept low as long as vibration for destabilizing the positional relationship between the spherical rollers 4, 4 and the outer ring 2 can be obtained. This is preferable from the viewpoint of suppressing the friction between the rolling contact surface and the guide spherical concave surface 19 and preventing the damage of these surfaces.

The principal part schematic plan view which shows the Example of this invention. The figure equivalent to the AA cross section of FIG. 1 which shows the state which turns this inner ring assembly in order to incorporate an inner ring assembly inside an outer ring. The fragmentary sectional view which shows one example of a self-aligning roller bearing. The figure seen from the side of FIG. Sectional drawing which shows the state which brought the inner ring assembly close to this outer ring without elastically deforming the outer ring. The side view which shows the state which inserted the inner ring assembly inside this outer ring | wheel in the state which elastically deformed the outer ring | wheel. The perspective view which shows the state which incorporates an inner ring assembly inside an outer ring | wheel by the conventional method. Sectional drawing which shows the state which a part of spherical roller which comprises this inner ring assembly interferes with the opening edge part of an outer ring, when integrating an inner ring assembly inside an outer ring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-aligning roller bearing 2 Outer ring 3 Inner ring 4 Spherical roller 5, 5a Cage 6 Outer ring raceway 7 Inner ring raceway 8 Main part 9, 9a Pocket 10 Outward flange part 11 Elastic tongue piece 12 Recessed part 13 Inner ring assembly 14 Manual 15 Base 16 Swing arm 17 Holding jig 18 Spherical recess 19 Spherical concave surface for guide 20 Recess 21 Rotary actuator 22 Output panel 23 Actuator 24 Output rod

Claims (4)

  An outer ring in which an outer ring raceway that is a spherical concave surface is formed on the inner peripheral surface, an inner ring in which a pair of inner ring races facing the outer ring raceway are formed on the outer peripheral surface, and the outer ring raceway and the inner ring raceway in two rows In order to assemble a self-aligning roller bearing comprising a plurality of spherical rollers provided so as to be freely rollable, and a cage having a plurality of pockets for holding each of these spherical rollers in a freely rollable manner, An inner ring assembly in which the spherical rollers and the cage are combined in advance is arranged inside the outer ring, and the central axis of the inner ring assembly and the central axis of the outer ring are substantially at the center of curvature of the outer ring raceway. After inserting the inner ring assembly into a state orthogonal to the inner ring assembly, the inner ring assembly is swung substantially 90 degrees about the diameter direction of the inner ring assembly and the outer ring, and the inner ring assembly is incorporated inside the outer ring. In the assembly method of the spherical roller bearing, The inner ring assembly is inserted inside the outer ring until the central axes of the inner ring assembly and the outer ring are substantially perpendicular to each other at the center of curvature of the outer ring raceway. The spherical rollers constituting the inner ring assembly are guided by the guiding spherical concave surface, which is the inner surface of the spherical concave portion, while the inner ring assembly is swung around the diametrical direction. A method of assembling a self-aligning roller bearing, characterized in that the center axis of the inner ring assembly and the center axis of the outer ring are substantially aligned with each other.   The guide spherical concave surface has substantially the same radius of curvature as the outer ring raceway, and the center of curvature of the outer ring raceway and the center of curvature of the guide spherical concave surface are substantially in a state where the outer ring is placed on the pedestal. The method of assembling a self-aligning roller bearing according to claim 1, which matches.   When the inner ring assembly is swung substantially 90 degrees around the diameter direction of the inner ring assembly and the outer ring, the pedestal is swung or rotated about the central axis of the outer ring mounted on the pedestal. Item 3. A method for assembling a self-aligning roller bearing according to any one of Items 1 and 2.   An outer ring in which an outer ring raceway that is a spherical concave surface is formed on the inner peripheral surface, an inner ring in which a pair of inner ring races facing the outer ring raceway are formed on the outer peripheral surface, and the outer ring raceway and the inner ring raceway in two rows In order to assemble a self-aligning roller bearing comprising a plurality of spherical rollers provided so as to be freely rollable, and a cage having a plurality of pockets for holding each of these spherical rollers in a freely rollable manner, An inner ring assembly in which the spherical rollers and the cage are combined in advance is arranged inside the outer ring, and the central axis of the inner ring assembly and the central axis of the outer ring are substantially at the center of curvature of the outer ring raceway. To insert the inner ring assembly into the inner side of the outer ring after the inner ring assembly is swung substantially 90 degrees about the diameter direction of the inner ring assembly and the outer ring. Assembly of spherical roller bearings In the inner ring assembly, a part of the inner ring assembly is inserted in a state where the center axes of the inner ring assemblies are substantially orthogonal to each other at the center of curvature of the outer ring raceway. As the inner ring assembly swings around the diametrical direction, the spherical rollers constituting the inner ring assembly are guided to the inner side of the outer ring raceway, and the inner surface is a spherical concave surface for guidance. A pedestal that has a spherical recess and on which the outer ring can be placed, and a portion that faces the opening of the spherical recess in the vicinity of the pedestal, is displaced about the diameter direction of the inner ring assembly and the outer ring. A self-aligning roller bearing assembly apparatus comprising a swing arm for swinging the inner ring assembly.

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