JP2005061594A - Automatic aligning roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To intend to prevent scoring at assembling from occurring when incorporating a roller into an inner ring and a retainer by passing through a roller insert of outer periphery on both ends of an inner ring and then sub-assembly is completed, to prevent the roller from coming to pieces, and to increase in efficiency of assembling works. <P>SOLUTION: Groove bottom of insert groove of the roller providing on outer periphery of a collar providing on outer periphery of both ends of the inner ring is configured so as to position in substantial alignment with extension line axially outwardly extending outside track in connection of the collar with the outside track of the inner ring. Furthermore, it installs a member of preventing it from coming to pieces in the roller insertion groove. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-aligning roller bearing used for an industrial machine or the like, and more particularly to a double row self-aligning roller bearing suitable for an open cage.

  Regarding double row spherical roller bearings, for example, regarding the technology of the stage where the inner ring assembly and the cage assembly are assembled with the outer ring to form a final assembly, a chamfered portion and an inclined portion are formed at the inner circumferential end of the outer ring. The device which solves the subject regarding an assembly by providing a surface is disclosed (for example, patent documents 1).

  By the way, in a double row self-aligning roller bearing in which a spherical roller is interposed between the outer ring and the inner ring and the roller is held by an open type cage, the roller, the inner ring, and the cage are assembled, When making an assembly, the cage pillars that form the pockets that accommodate the rollers are once displaced radially outward with a predetermined tool with elastic deformation, and the outer peripheral parts of the collars at both ends of the inner ring Pass the roller and insert the roller.

The prior art will be described with reference to FIGS.
FIG. 8 shows an assembly drawing of a conventional self-aligning roller bearing. Reference numeral 1 denotes an outer ring having an inner track 11. Reference numeral 2 denotes an inner ring having double-row outer raceways 21. The inner ring 2 has a flange portion 23 that is continuous with the track on the outer side in the axial direction of the track 21, that is, on the outer periphery of both ends of the inner ring. Reference numeral 3 denotes a spherical roller, 4 denotes an open portion 41 having an annular portion 41 and a column portion 42 extending axially outward from the annular portion, and 5 denotes a floating ring.

FIG. 9 illustrates the assembly of the sub-assembly including the inner ring, rollers, cage, and floating ring. In FIG. 9, the left side roller assembly is illustrated, but when the left side is completed, the right side is naturally performed. In the assembly in the circumferential direction, the rollers are sequentially moved in the circumferential direction one by one while passing through the outer peripheral portion of the collar and accommodated in the pocket of the cage. At this time, a force is applied to the outer side X of the cage in the radial direction X with a predetermined tool so as to be displaced with elastic deformation once as indicated by a broken line, and the rollers that have passed through the outer periphery of the collar are inserted in the insertion direction. The direction of Y and the pocket portion are matched so that insertion into the pocket from the axial direction is facilitated.
JP-A-7-127636

  However, as described above, when the roller is inserted, the retainer column part is deformed outward, so that the work itself is of course annoying, but the retainer column is greatly deformed and requires a large deformation force. As a result, the cage is plastically deformed and the cage dimensions, in particular, the dimensional accuracy of the pocket portion is deteriorated, and the roller outer peripheral surface is damaged when the roller is inserted. There is a risk that a so-called assembly damage may occur, in which the roller hits the raceway surface of the inner ring and damages the raceway surface.

  The object of the present invention is to facilitate and improve the assembly of the roller, inner ring, and cage sub-assemblies, to prevent the occurrence of assembly flaws, and to maintain quality. It is an object of the present invention to provide a self-aligning roller bearing that solves the above problem.

  The present invention includes an outer ring having a single spherical inner raceway, a double-row outer race facing the inner raceway of the outer ring, and a double-row double-track raceway provided on each outer peripheral portion. An inner ring provided with a collar, a plurality of spherical rollers arranged in a double row between the inner race and the outer race, and a ring portion at the center and the annular portion holding the spherical rollers A double row automatic comprising a column portion extending axially on both sides to form a pocket portion opened outward in the axial direction and holding a spherical roller in the pocket portion. In the spherical roller bearing, a roller insertion groove is provided on the outer periphery of the collar portion, and a groove bottom portion of the roller insertion groove extends the outer raceway in the connecting portion between the outer raceway and the collar portion of the inner ring in the axial direction. Is configured to be located substantially on the same line as the line, and The filtrate insertion groove is intended to resolve the problem by wearing the fall over is prevented member.

  The anti-rolling member may be a key-like member or a pin-like member. Further, the open type retainer may be of a minnow type, or may be of a punched shape by a press. In addition, although it is desirable that the roller does not require an insertion force, the insertion force may be generated to the extent that the cage is not deformed or scratched.

  By adopting the configuration of the present invention, when assembling the assembly of the roller, the cage and the inner ring, the cage pillar is not deformed, so that the assembly becomes easy, the assembly is not damaged, and the roller barrel is not damaged. The quality of the product can be maintained.

[Embodiment 1]
Embodiments of the present invention are shown in the assembly diagram of FIG. 1, the roller insertion portion of FIG. 2, the related diagram of the cage portion of FIG. 3, the partial assembly diagram of FIG. 4a, and the roller / inner ring / cage subassembly of FIG. An explanation will be given based on the assembly drawing.

  In FIG. 1, reference numeral 1 denotes an outer ring having a single spherical inner raceway 11. Reference numeral 2 denotes an inner ring having a double row outer race 21 facing the inner race of the outer race. The inner ring has a flange portion 23 that is continuous with the track 21 on the outer side in the axial direction of the track 21, that is, on both outer peripheral portions 22 of the inner ring. As shown in FIG. 2 (the view A in FIG. 1), at least a portion of the collar portion 23 in the circumferential direction has a roller insertion groove 24 necessary for assembly, which will be described later. The bottom portion 25 is configured so as to be positioned substantially on the same line as an extension line 26 that extends the outer raceway 21 outward in the axial direction at the connecting portion 27 of the outer race 21 and the flange portion 23 of the inner ring.

Reference numeral 3 denotes a spherical roller formed of a so-called barrel-shaped outer peripheral portion 31 and an end surface portion 32, and is interposed in a space S formed by the inner race of the outer ring and the outer race of the inner ring. .
Reference numeral 4 denotes a cage composed of an annular portion 41 at the center and column portions 42 extending axially from the annular portion. The column portion is shown in FIG. As shown, pocket portions 43 that are open toward both axial sides are formed between the pillars, and spherical rollers are accommodated and held in the pocket portions. Reference numeral 5 denotes an annular floating ring between an inner ring central outer peripheral part and the cage annular part inner peripheral surface. The floating ring is in contact with the end face 32 of the spherical roller. When the bearing is in use, particularly when a thrust load is generated, the end surface portion of the collar portion and the end surface portion 51 of the floating ring serve as a transmission path for the thrust load. The roller insertion groove 24 is provided with, for example, a recess 28 such as a key groove, and a roll prevention member 29 such as a key is attached to the key groove to prevent the roller from dropping off. The keyway is provided at a position where the attached key-like member does not come into contact with the end surface portion of the spherical roller even when the thrust load is transmitted when the bearing is in use.

  In the main part enlarged view of FIG. 2 (view A in FIG. 1), the anti-barre member 29 is a rectangular key-shaped member, and a key groove 28 for mounting the key-shaped member is provided in the roller insertion groove 24. Is fixed.

  In FIG. 4a, the left roller array is first assembled. In this case, the roller is inserted from the insertion side (left side in FIG. 4a) through the roller insertion groove provided in the collar portion of the inner ring and inserted into the pocket portion surrounded by the two cage pillars. The The four groove bottom portions 25 of the roller insertion grooves are positioned substantially on the same line as an extension line 26 that extends the outer track 21 outward in the axial direction by a connecting portion 27 of the outer track 21 and the flange 23 of the inner ring. Therefore, it is possible to align the pockets in the insertion direction Y of the rollers without applying force to the column portion 42 of the cage and deforming the column portions outwardly. Can be assembled.

  FIG. 4b shows a state in which the right roller row is assembled in the same procedure as in FIG. 4a and the key-like member is finally fixed, and the roller / inner ring / retainer sub-assembly is formed. Yes. As can be understood from FIG. 1 in the state of use of the roller bearing, the collar portion of the inner ring receives a load from the spherical roller, but the key-shaped member does not come into contact with the end portion of the roller, so deformation, wear, etc. There is no problem.

[Embodiment 2]
In the first embodiment, the concave portion is a key groove, and a key is attached to the key groove as a rolling prevention member. As the rolling member, FIG. 5 and FIG. As shown, the pin-shaped member 29a can be mounted in the recess 28a. In this embodiment, since the anti-rolling member is a pin-shaped member, the recessed portion to be mounted may be a pin hole, and the processing is further facilitated.

[Embodiment 3]
In the first embodiment, the cage is an open-type cage. However, as shown in FIG. 7 of the third embodiment, the cage may be an open-type cage 4a.

  In Embodiments 1 and 2, rectangular key-shaped members and pin-shaped members are shown as the anti-rolling members. However, the present invention is not limited to these members, and any member and method satisfying the anti-rolling function may be used. For example, the present invention is not limited to the above embodiment.

The assembly drawing of the self-aligning bearing which uses the open type cage of Embodiment 1 of this invention. The roller insertion part of FIG. 1 (arrow A figure of FIG. 1). The related figure of a holder | retainer place (cross-section BB figure of FIG. 1). The principal part assembly drawing of FIG. FIG. 2 is an assembly drawing of the roller / retainer / inner ring subassembly of FIG. 1. The principal part assembly drawing of Embodiment 2 of this invention. The roller insertion part of FIG. 5 (arrow A figure of FIG. 5). The assembly drawing of Embodiment 2 of the present invention. Assembly drawing of a conventional self-aligning bearing. The partial assembly figure of FIG.

Explanation of symbols

1: Outer ring 11: Inner ring of outer ring 2: Inner ring 21: Outer race of inner ring 22: End face part of inner ring 23: Brim part 24: Roller insertion groove 25: Bottom part of roller insertion groove 26: Extension line 27: Linking part 28 , 28a: recess (key groove)
29, 29a: Rolling prevention member (key-like member, pin-like member) 3: Roller 4: Cage 41: Ring part 42: Cage column part 43: Pocket part

Claims (3)

  An outer ring having a single spherical inner raceway, a double row outer race facing the inner raceway of the outer ring, and a flange portion provided on each outer peripheral portion of the double row and connected to each outer raceway. A plurality of spherical rollers arranged in double rows between the inner ring and the inner raceway and the outer raceway, and the spherical rollers are held on both sides in the axial direction from the annular portion of the central portion and the annular portion. In the double-row self-aligning roller bearing comprising a pocket portion that is opened outward in the axial direction by an extending column portion, and an open type retainer that holds a spherical roller in the pocket portion, A roller insertion groove is provided on the outer periphery of the flange portion, and the groove bottom portion of the roller insertion groove is substantially collinear with an extension line extending the outer track in the axial direction at the connecting portion between the outer track and the flange portion of the inner ring. In addition, the roller insertion groove is Self-aligning roller bearing, characterized in that mounted Barre preventing member.   2. The self-aligning roller bearing according to claim 1, wherein the open type cage is an open type cage. 2. The self-aligning roller bearing according to claim 1, wherein the rolling prevention member is a key-like member.

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