JP2009210091A - Automatic aligning roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide a structure facilitating assembly work and component management of an inner ring assembly, improving durability by preventing damage of rolling surfaces of respective spherical rollers 4, 4 and both inner ring raceways 8 of an inner ring 3 in the assembly work. <P>SOLUTION: The whole of a cage 5a is formed into a nearly-cylindrical shape by circumferentially combining a pair of semicircular cage elements 16, 16 with each other, to solve the above problem. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement in a self-aligning roller bearing that is incorporated in various mechanical devices and supports a rotating shaft inside a housing, for example. Specifically, the work to incorporate each spherical roller into the cage can be realized easily and without damaging the rolling surface of each spherical roller and the inner ring raceway of the inner ring, reducing the assembly work cost, It is intended to improve work efficiency and reliability after assembly.

  For example, as a self-aligning roller bearing that rotatably supports a heavy shaft on the inside of a housing, a structure as shown in FIG. 5 has been widely known. 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. The cage 5 and the guide wheel 6 regulate the position and posture of each of the spherical rollers 4 and 4.

An outer ring raceway 7, which is a spherical concave surface having a single center, is formed on the inner peripheral surface of the outer ring 2.
Further, a pair of inner ring raceways 8 and 8 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. 5). Further, flanges 9 and 9 having outward flange shapes are formed on the outer peripheral surfaces of both ends of the inner ring 3, and the spherical rollers 4 and 4 are respectively connected to the inner peripheral surface of the outer ring 2 and the outer peripheral surface of the inner ring 3. So that it does not escape axially outward from the space between.
The plurality of spherical rollers 4 and 4 have a beer barrel shape in which the maximum diameter portion is present in the middle portion in the axial direction of each of the spherical rollers 4 and 4 (in general, the maximum diameter portion is symmetrical in the axial center portion). ) Between the outer ring raceway 7 and the pair of inner ring raceways 8, 8.

  The cage 5 was made as a whole by cutting a metal material having self-lubricating properties such as a copper-based alloy such as brass, or by injection molding a synthetic resin. In this configuration, the rim portion 10 includes an annular rim portion 10 and a plurality of column portions 11 and 11 projecting in opposite directions from both axial side surfaces of the rim portion 10. Then, pockets 12 and 12 for holding the respective spherical rollers 4 and 4 are respectively surrounded by three sides surrounded by the side surfaces of the column portions 11 and 11 adjacent in the circumferential direction and the axial side surface of the rim portion 10. It is said. The cage 5 is positioned in the radial direction by bringing the inner peripheral surface of the rim portion 10 close to the outer peripheral surface of the guide wheel 6 (sliding contact or facing through a minute gap).

  Further, the guide wheel 6 is formed in an annular shape as a whole by a material having a low coefficient of friction such as a self-lubricating metal such as a copper-based alloy, an oil-impregnated metal, or a synthetic resin. The guide wheel 6 has a trapezoidal cross section in which the axial width is larger on the outer diameter side and smaller on the inner diameter side, and has a slightly larger inner diameter than the intermediate portion in the axial direction of the inner ring 3, and the rim portion 10 of the cage 5. And an outer diameter that is slightly smaller than the inner diameter. Such a guide wheel 6 is installed between the inner peripheral surface of the inner ring 3 and the inner peripheral surface of the rim portion 10 so as to be able to rotate relative to the inner ring 3 and the rim portion 10. In this state, both side surfaces in the axial direction of the guide wheel 6 are the inner end surfaces in the axial direction of the spherical rollers 4, 4 (“inner” with respect to the axial direction refers to the center in the width direction of the self-aligning roller bearing 1, On the contrary, the outer side in the width direction of the self-aligning roller bearing 1 is referred to as “outside” with respect to the axial direction, which is substantially the same throughout the present specification and claims. The planes connecting the two are parallel.

  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 fixed to the rotating shaft. When the inner ring 3 rotates together with the rotating shaft, the spherical rollers 4 and 4 roll to allow this rotation. When 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). To compensate for this discrepancy.

In order to assemble such a self-aligning roller bearing 1, first, an inner ring assembly constituted by the inner ring 3, the guide ring 6, the cage 5, and the spherical rollers 4 and 4, The outer ring 2 is assembled outside. Then, the inner ring assembly is assembled to the inner diameter side of the outer ring 2.
In the assembling operation of the inner ring assembly, the guide wheel 6 and the cage 5 are first assembled on the outer diameter side of the inner ring 3 as shown in FIG. In this state, the spherical rollers 4 are stored one by one in the pockets 12 and 12 of the cage 5. At this time, as shown by the chain line in FIG. 6, the spherical rollers 4 are connected to the end portions in the axial direction of the inner ring 3 in a state where the cylindrical rollers 4 are elastically deformed radially outward. The brim 9 on the left side (the left end in FIG. 6) is moved over and accommodated in the pockets 12 and 12 through the axial openings of the pockets 12 and 12. Although FIG. 6 shows the accommodation operation for the left column, the same operation is performed for the right column.

  In the case of such an assembly work of the inner ring assembly that has been conventionally performed, the work of elastically deforming the column portions 11 and 11 of the cage 5 outward in the radial direction is troublesome, and the work efficiency is lowered. It can be thought of. In addition, when the column parts 11 and 11 are elastically deformed outward in the radial direction, the force applied is increased. As a result, when the amount of elastic deformation increases, the column parts 11 and 11 are plastically deformed. It is conceivable that the dimensional accuracy of the pockets 12 and 12 of the cage 5 is lowered. When the spherical rollers 4 are accommodated in the pockets 12 and 12, the rolling surfaces of the spherical rollers 4 and the end portions of the flanges 9 and 9 of the inner ring 3 come into contact with each other. The outer peripheral edge portion of the end surface of the spherical roller 4 and the inner ring raceways 8 and 8 of the inner ring 3 come into contact with each other, causing damage such as scratches on the rolling surfaces and the inner ring raceways 8 and 8. The durability of the self-aligning roller bearing 1 may be impaired.

  In view of such circumstances, Patent Document 1 describes a structure as shown in FIG. In the self-aligning roller bearing described in Patent Document 1, the structure of the inner ring 3a constituting the self-aligning roller bearing is devised in order to solve the above problem. In this conventional improved self-aligning roller bearing, the spherical rollers 4, 4 pass in the axial direction at least in one circumferential direction of the flanges 9, 9 formed on the outer peripheral surfaces of both ends of the inner ring 3a. The possible insertion grooves 13 and 13 are formed. In addition, the spherical rollers 4 and 4 come out from the insertion grooves 13 and 13 in the axial direction in a state where the spherical rollers 4 and 4 are assembled to the cage 5 at the bottoms of the insertion grooves 13 and 13. Engaging grooves 14 and 14 for engaging the engaging members 15 and 15 for preventing this are formed.

When assembling the inner ring assembly of such an improved self-aligning roller bearing, first, the guide wheel 6 and the cage 5 are assembled on the outer diameter side of the inner ring 3a.
Next, the spherical rollers 4 and 4 are passed through the insertion groove 13 from the axial direction as shown by a chain line in FIG. 7, and each pocket of the cage 5 is also shown by a solid line in FIG. 12 and 12. Such an operation is repeated until the spherical rollers 4 and 4 are accommodated in all the pockets 12 and 12 while the cage 5 is shifted in the circumferential direction together with the inserted spherical rollers 4.
Further, after the spherical rollers 4 and 4 are accommodated in all the pockets 12 and 12, the engagement members 15 and 15 are engaged with the engagement grooves 14 and 14, respectively. The spherical rollers 4 and 4 are prevented from coming out of the insertion grooves 13 and 13 outward in the axial direction.

According to the conventional improved self-aligning roller bearing as described above, when the spherical rollers 4 and 4 are accommodated in the pockets 12 and 12 of the cage 5, The operation | work which elastically deforms each pillar part 11 and 11 and the operation | work which gets over the said spherical rollers 4 and 4 over the said collar parts 9 and 9 are unnecessary. For this reason, the dimensional accuracy of the cage 5 decreases as in the conventional assembly work of the inner ring assembly described with reference to FIG. 6, or the rolling surfaces of the spherical rollers 4 and 4 and the inner ring. The inner ring raceways 8 and 8 of 3a are not damaged, and the durability of the self-aligning roller bearing is not impaired.
However, in the case of the self-aligning roller bearing, it is necessary to perform a machining operation for forming the insertion grooves 13 and 13 and the engagement grooves 14 and 14 in the flange portions 9 and 9. For this reason, it can be considered that the processing cost increases. Further, it is necessary to provide the engaging members 15 and 15 as separate members. For this reason, it may be considered that the parts management cost increases. Further, the operation of storing the spherical rollers 4 and 4 in the pockets 12 and 12 of the retainer 5 through the insertion grooves 13 and 13 is performed by the insertion grooves 13 and 13 and the pockets 12. Therefore, troublesome work such as aligning the circumferential position with, 12 is required, and work efficiency may be reduced. For this reason, there is room for improvement.

Further, unlike the structure of the cage shown in FIGS. 6 to 7 described above, Patent Document 2 discloses a method of assembling each spherical roller to a cage having a structure in which each pocket does not open in the axial direction. Are listed. In the method described in Patent Document 2, the spherical rollers are assembled in the pockets of the cage incorporated in the inner ring from the radial direction of the cage using a plastic hammer. That is, the spherical rollers are made to face each of the pockets of the cage supported on the outer diameter side of the inner ring, and the hammer is hit against each of the spherical rollers, so that each of the spherical rollers is placed in the pocket. Assemble one by one. Such assembling work is troublesome and requires skill, and the work time becomes long, so that the manufacturing cost may increase. Moreover, in order to hit each spherical roller, it is conceivable that the rolling surface of each spherical roller may be damaged, or the column portion that is a portion between the pockets of the cage may be deformed. Further, when the spherical rollers are assembled with the hammer, the rolling surfaces of the spherical rollers and the inner ring raceways of the inner ring may come into contact with each other and be damaged.
In addition, the structure of the cage | basket provided with the pocket which has an appropriate shape when implementing the self-aligning roller bearing of this invention is described in patent documents 3-4.

JP 2005-61594 A JP 2006-207730 A JP 2006-250302 A JP 2006-194289 A

  In view of the circumstances as described above, the present invention facilitates the assembly work and parts management of the inner ring assembly. Further, at the time of this assembly work, the rolling surface of each spherical roller and both inner ring raceways of the inner ring are provided. The invention has been invented to realize a structure capable of preventing damage and improving durability at low cost.

A self-aligning roller bearing that is an object of the present invention includes an outer ring, an inner ring, a plurality of spherical rollers, and a cage.
Of these, the outer ring has an outer ring raceway that is a spherical concave surface having a single center on the inner peripheral surface.
The inner ring has a pair of inner ring raceways opposed to the outer ring raceway on the outer peripheral surface.
Each of the spherical rollers is provided between the outer ring raceway and the both inner ring raceways so as to be freely rollable for each row of raceways.
Further, the cage has a plurality of pockets, each of which holds the spherical rollers in a rollable manner.
In particular, in the self-aligning roller bearing of the present invention, the cage is configured by combining semi-cylindrical cage elements.

As described above, the cage constituting the self-aligning roller bearing of the present invention is a split-type cage formed by combining semicylindrical cage elements. For this reason, when assembling the inner ring assembly, the spherical rollers are assembled to the cage elements in advance, and then the cage elements and the spherical rollers, which are coupled to each other without separation, are attached to the inner ring. Can be assembled from the outer diameter side.
In this way, the work of assembling the spherical rollers to the cage elements can be performed from the outside in the radial direction without interference between the spherical rollers and the inner ring. It is possible to improve work efficiency by omitting troublesome work such as elastically deforming the.
Further, during the assembling work, the rolling surfaces of the spherical rollers and the flange portion of the inner ring do not rub against each other. Further, the outer peripheral edge portion of each of the spherical rollers and the inner ring raceways of the inner ring do not rub against each other. For this reason, it is possible to prevent damage such as scratches from occurring on the rolling surface and both the inner ring raceways. As a result, the cost required for the assembly work can be reduced, and the durability after the assembly can be improved.

[First example of embodiment]
1 and 2 show a first example of an embodiment of the present invention. The feature of the present invention, including this example, is that the structure of the cage 5a constituting the self-aligning roller bearing 1a is devised in order to realize a structure that can easily assemble the inner ring assembly. . Since the configuration and operation of the other parts are the same as those of the self-aligning roller bearing 1 having the conventional structure described with reference to FIG. 5, the same parts are denoted by the same reference numerals, and redundant description is omitted or simplified. Hereinafter, the characteristic part of this example will be mainly described. Incidentally, the self-aligning roller bearing 1a of this example is not provided with guide wheels, and this cage is engaged by the engagement between the inner surfaces of the pockets 12 and 12 of the cage 5a and the rolling surfaces of the spherical rollers 4 and 4. This is a rolling element guide system for guiding 5a. However, in the present invention, as in the second to third examples of the embodiments described later, the guide ring 6 is provided like the conventional self-aligning roller bearing 1 shown in FIG. The present invention can also be applied to an inner ring guide type self-aligning roller bearing guided by No. 3.

The cage 5a constituting the self-aligning roller bearing 1a of the present example is divided into a cylindrical shape as a whole by combining a pair of cage elements 16, 16 each having a semicylindrical shape in the circumferential direction. It is a mold cage.
The cage elements 16 and 16 are parallel to the rotation axis of the spherical rollers 4 and 4 in opposite directions from the semicircular arc-shaped rim portion 10a and both axial side surfaces of the rim portions 10a. And a plurality of pillars 11 and 11 projecting in various directions. Then, pockets 12 and 12 for holding the respective spherical rollers 4 and 4 are respectively enclosed in three sides by the side surfaces of the column portions 11 and 11 adjacent in the circumferential direction and the axial side surface of the rim portion 10a. It is said. Further, in a state where the spherical rollers 4 and 4 are held, the spherical rollers 4 and 4 face each other in the circumferential direction in the pockets 12 and 12 so that the spherical rollers 4 and 4 do not fall from the pockets 12 and 12. The distance in the circumferential direction between the radially outer side and the radially inner side portion between the side surfaces is smaller than the outer diameter of the maximum diameter portion of each of the spherical rollers 4 and 4. Further, in order to prevent the spherical rollers 4 and 4 from falling from the axial openings of the pockets 12 and 12 in the held state, the inner dimensions in the circumferential direction of the openings are set to It is slightly smaller than the outer diameter of the maximum diameter part of the spherical rollers 4 and 4.
In addition, the fall prevention structure of each said spherical roller 4 and 4 provided in each said pocket 12 and 12 of the said holder | retainer 5a (both said holder | retainer elements 16 and 16) is described in the said patent documents 3-4, for example. Various structures known in the art can be employed including such structures.

The assembly operation of the self-aligning roller bearing 1a of the present example as described above is similar to the assembly operation of the self-aligning roller bearing 1 having the conventional structure described above. First, the inner ring 3, the cage 5a, An inner ring assembly constituted by the spherical rollers 4 and 4 is assembled outside the outer ring 2. Then, the inner ring assembly is assembled to the inner diameter side of the outer ring 2. A method for assembling the inner ring assembly on the inner diameter side of the outer ring 2 has been conventionally known and is not related to the characterizing portion of the present invention.
In the case of the self-aligning roller bearing 1a of the present example, the cage 5a is configured by combining a pair of cage elements 16, 16 in the circumferential direction, each having a semi-cylindrical shape. For this reason, in the assembly work of the inner ring assembly, first, the spherical rollers 4 and 4 are assembled in the pockets 12 and 12 of the two retainer elements 16 and 16 at a position apart from the inner ring 3. In this assembling operation, the spherical rollers 4 and 4 are elastically deformed in the circumferential direction from the front end openings of the pillars 11 and 11 in the pockets 12 and 12, respectively. While doing. Then, after the spherical rollers 4 and 4 are assembled in all the pockets 12 and 12, the spherical rollers 4 and 4 and the two retainer elements are combined with each other as shown in FIG. 16 and 16 are assembled to the inner ring 3 from the radially outer side of the inner ring 3.

As described above, according to this example, the operation of assembling the spherical rollers 4 and 4 into the pockets 12 and 12 of the retainer elements 16 and 16 can be performed at a position away from the inner ring 3. . For this reason, as in the assembly work of the conventional structure described with reference to FIG. 6, each of the cage elements 16, 16 is to avoid the flanges 9, 9 provided on the outer peripheral surface of the end of the inner ring 3. It is not necessary to elastically deform the column parts 11 and 11 radially outward. That is, it is not necessary to work over the spherical rollers 4 and 4 over the flanges 9 and 9 at the axial ends of the inner ring 3. For this reason, the troublesome operation | work which elastically deforms each pillar part 11 and 11 of the said both holder | retainer elements 16 and 16 can be abbreviate | omitted, and the improvement of work efficiency can be aimed at. Further, since the column portions 11 and 11 of the cage elements 16 and 16 are not plastically deformed, the dimensional accuracy of the pockets 12 and 12 of the cage elements 16 and 16 is lowered. There is nothing. In addition, the rolling surfaces of the spherical rollers 4 and 4 and the flanges 9 of the inner ring 3 which cause damage to the rolling surfaces of the spherical rollers 4 and 4 and the inner ring raceways 8 and 8 are obtained. No strong rubbing with the end of 9 or strong rubbing between the outer peripheral edges of the spherical rollers 4 and 4 and the inner ring raceways 8 and 8 of the inner ring 3 does not occur. Therefore, damages such as scratches are less likely to occur on the inner raceways 8, 8 and the rolling surfaces of the spherical rollers 4, 4, and the durability of the self-aligning roller bearing 1 can be improved. it can.
Further, unlike the self-aligning roller bearing described in Patent Document 1 shown in FIG. 7, it is not necessary to form the insertion grooves 13 and 13 and the engagement grooves 14 and 14 in the inner ring 3a. For this reason, the processing cost does not increase. Moreover, it is not necessary to provide each engaging member 15 and 15 as a separate body. For this reason, the parts management cost does not increase.

  The operation of assembling the spherical rollers 4 and 4 into the pockets 12 and 12 of the retainer elements 16 and 16 is performed from the openings in the axial direction of the pockets 12 and 12 as described above. This is done by pushing in the spherical rollers 4 and 4. Since the dimensions of these openings are restricted to slightly smaller dimensions as described above with respect to the maximum outer diameter of the spherical rollers 4 and 4, the two retainer elements 16 are used during the assembly operation. , 16 need only be slightly elastically deformed in the circumferential direction. In addition, since both the cage elements 16 and 16 are made of a material that is sufficiently softer than the spherical rollers 4 and 4, the dimensional accuracy of the pockets 12 and 12 may be reduced, or the spherical rollers 4. No damage such as scratches occurs on the rolling surface of No. 4.

[Second Example of Embodiment]
FIG. 3 shows a second example of the embodiment of the present invention. The cage 5b of the self-aligning roller bearing 1b of this example has four semi-cylindrical cage elements 16a and 16b (the two cage elements 16a and 16b are denoted by reference numerals for convenience of explanation). In this example, the same structure is reversed and used in the axial direction.) Is combined in the circumferential direction and the axial direction. That is, in the left column of FIG. 3, the pair of cage elements 16a are combined in the circumferential direction. In the right column, the pair of retainer elements 16b are combined in the circumferential direction. The retainer 5b is configured by combining the retainer elements 16a in the left row and the retainer elements 16b in the right row combined in the circumferential direction in the axial direction.
Each of the cage elements 16a and 16b includes semi-arc-shaped rim portions 10b and 10b, and a plurality of column portions 11 and 11 protruding from one side surface in the axial direction of the rim portions 10b and 10b. Then, pockets for holding the spherical rollers 4 and 4 respectively, which are surrounded on three sides by the side surfaces of the column portions 11 and 11 adjacent to each other in the circumferential direction and the axial side surfaces of the rim portions 10b and 10b. 12 and 12.
An annular sliding member 17 is provided between the inner side surfaces of the rim portions 10b and 10b of the cage elements 16a and 16b facing each other in the axial direction. The sliding member 17 is made of a synthetic resin material having a low friction coefficient such as polyamide resin or polytetrafluoroethylene resin, or a metal material having a low friction coefficient such as a contained metal or a copper-based alloy. I can do things.
Further, the cage elements 16a and 16b are arranged in two rows between the inner peripheral surfaces of the rim portions 10b and 10b and the inner peripheral surface of the sliding member 17 and the outer peripheral surface of the intermediate portion of the inner ring 3. An annular guide wheel 6 is rotatably provided in an annular gap between the rows of the plurality of spherical rollers 4 and 4. Then, by positioning the rim portions 10b and 10b close to each other on the outer peripheral surface of the guide wheel 6 (sliding contact or facing each other through a minute gap), the radial positioning of the two retainer elements 16a and 16b is achieved. ing.

  In the case of such a self-aligning roller bearing 1b of this example, both the retainer elements 16a for holding the spherical rollers 4 and 4 in the left side row of FIG. 3 and the spherical rollers 4 in the right side row. The two retainer elements 16b for holding 4 are made independent of each other so as to be capable of relative rotation. That is, even when an axial load is applied to the spherical roller bearing 1b and a difference occurs in the revolution speed of the spherical rollers 4 and 4 in both rows, the spherical rollers 4 and 4 in both rows are connected. The two retainer elements 16a and 16b that are held can rotate independently of each other. For this reason, the spherical rollers 4 in a row with a high revolution speed drag the spherical rollers 4 in a slow row, or the spherical rollers 4 in a row with a low revolution speed are dragged in the spherical rollers in a fast row. No braking is applied to the revolution movement of No. 4. As a result, the dynamic torque of the self-aligning roller bearing 1b and the heat generated during operation can be kept low.

  In the case of the self-aligning roller bearing 1b of the present example, the sliding member 17 is provided between the inner side surfaces of the rim portions 10b, 10b of the cage elements 16a, 16b facing each other in the axial direction. Yes. For this reason, as described above, the inner surfaces of the rim portions 10b and 10b of the cage elements 16a and 16b opposed to each other in the axial direction of relative rotation do not directly rub against each other, and the rim portions 10b are not rubbed during relative rotation. The friction on the inner surface of 10b can be suppressed, and the increase in wear and heat generation on the inner surfaces of these rim portions 10b and 10b can be prevented. Since the structure and operation of the other parts are the same as those of the first example of the above-described embodiment, the same parts are denoted by the same reference numerals, and redundant description is omitted.

[Third example of embodiment]
FIG. 4 shows a third example of the embodiment of the present invention. The configuration of the cage 5b of the self-aligning roller bearing 1c of this example is the same as that of the second example of the embodiment described above.
Of the two cage elements 16a and 16b constituting the cage 5b, an annular ring is formed between the inner side surfaces of the rim portions 10b and 10b of the cage elements 16a and 16b facing each other in the axial direction. A sliding member 17a is provided. Such a sliding member 17a is formed between a plurality of spherical rollers 4, 4 arranged in two rows between the inner peripheral surface of each of the rim portions 10b, 10b and the outer peripheral surface of the intermediate portion of the inner ring 3. It is formed integrally with an annular guide wheel 6a that is rotatably provided in the annular gap.
Thus, in the case of the self-aligning roller bearing 1c of this example, since the sliding member 17a and the guide wheel 6a are integrally formed, the number of parts can be reduced and the part management cost can be reduced. Can be planned. Since the structure and operation of the other parts are the same as those of the second example of the embodiment described above, the same parts are denoted by the same reference numerals, and redundant description is omitted.

The fragmentary sectional view of the self-aligning roller bearing which shows the 1st example of embodiment of this invention. Similarly, sectional drawing seen from the direction orthogonal to FIG. 1 for demonstrating the assembly operation | work of an inner ring assembly. The fragmentary sectional view of the self-aligning roller bearing which shows the 2nd example of embodiment of this invention. Similarly, the fragmentary sectional view of the self-aligning roller bearing which shows a 3rd example. The fragmentary sectional view which shows the 1st example of the self-aligning roller bearing of the conventional structure. Similarly, the fragmentary sectional view seen from the same direction as FIG. 5 for demonstrating the assembly operation | work of an inner ring assembly. The fragmentary sectional view similar to FIG. 6 for demonstrating the assembly operation | work of the inner ring assembly of the self-aligning roller bearing of the 2nd example of conventional structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c Self-aligning roller bearing 2 Outer ring 3, 3a Inner ring 4 Spherical roller 5, 5a, 5b Cage 6, 6a Guide wheel 7 Outer ring raceway 8 Inner ring raceway 9 鍔 part 10, 10a, 10b Rim part 11 11 Pillar part 12 Pocket 13 Insertion groove 14 Engagement groove 15 Engagement member 16, 16a, 16b Cage element 17, 17a Sliding member

Claims (1)

  Between the outer ring in which the outer ring raceway, which is a spherical concave surface, is formed on the inner circumferential surface, the inner ring in which a pair of inner ring races opposed to the outer ring raceway are formed on the outer circumferential surface, and between the outer ring raceway and both the inner ring raceways, Spherical roller bearings that are divided into rows and are provided so as to be able to roll plurally for each row, and a cage having a plurality of pockets for holding each of the spherical rollers so as to roll freely. In this case, the self-aligning roller bearing is characterized in that the retainer is a split retainer constituted by combining semi-cylindrical retainer elements.

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