JP2009185925A - Full type roller bearing and fallout prevention implement used for this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a roller from falling out from an inner ring in such a state that the inner ring and the roller are separated from an outer ring. <P>SOLUTION: A fallout prevention implement 19 attached to the inner ring 11 of a full type roller bearing 10 includes a stopper 21 preventing a roller 13 from falling out from the inner ring 11 in such a state that the roller 13 and the inner ring 11 are separated from the outer ring 12. Furthermore, the stopper 21 provides a plurality of supporting sections 23 supporting a posture of each roller 13 in such a state that it is inserted between each roller 13. Additionally, the supporting section 23 is inserted between each roller 13 at a cone back face rib section 16 side of the inner ring 11, and supports each roller 13 in cooperation with a retaining rib section 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a full-roller bearing used for supporting a main shaft of a wind power generator, for example, and a roller drop-off prevention tool used therefor.

  In a wind power generator, a single row tapered roller bearing may be used for supporting a main shaft. Since the tapered roller bearing for supporting the main shaft is usually very large with an outer diameter of 1 m or more, the operation of assembling or disassembling the tapered roller bearing is performed as shown in FIG. 11, the tapered roller bearing 1 is turned sideways (with the axis centered in the vertical direction) while the inner ring 11 and the tapered roller 13 are moved up and down.

  In the case of a tapered roller bearing provided with a cage for holding the tapered roller 13, a crane can be connected to the cage, and the tapered roller 13 and the inner ring 11 can be lifted together with the cage. However, when the tapered roller bearing 1 is a full-roller type not equipped with a cage, as shown in FIG. 5A, an eyebolt 40 or the like is attached to the inner ring 11 and a crane is connected, and the inner ring 11 must be lifted directly. I must. However, when the inner ring 11 is directly lifted, there is a problem that the tapered roller 13 falls off from the inner ring 11 as shown in FIG.

The following Patent Document 1 discloses a technique related to the transportation and assembly of a rolling bearing used for supporting a main shaft of a wind power generator.
JP 2006-46465 A

  An object of the present invention is to provide a full-roller bearing capable of preventing a roller from falling off from an inner ring in a state where the inner ring and the roller are separated from an outer ring, and a roller drop-off preventing tool used therefor.

  A full roller bearing according to the present invention includes an outer ring having an outer ring raceway surface, an inner ring having an inner ring raceway surface, and a plurality of full roller type rollers disposed between the outer ring raceway surface and the inner ring raceway surface in a rollable manner. And a roller drop-off prevention tool provided with a stopper which is attached to the inner ring and prevents the roller and the inner ring from dropping off from the outer ring in a state where the roller and the inner ring are separated from each other. To do.

The roller drop prevention device for the full roller bearing of the present invention is attached to the inner ring of the full roller bearing, and prevents the roller from dropping from the inner ring when the inner ring and the roller are separated from the outer ring of the full roller bearing. A stopper is provided.
According to each of the above inventions, when the full roller bearing is assembled or disassembled, the roller can be prevented from falling off from the inner ring by the stopper even if the inner ring and the roller are separated from the outer ring.

  The stopper can be formed in an annular shape coaxial with the inner ring, and further includes a plurality of support portions that are inserted between the rollers to support the postures of the rollers at intervals in the circumferential direction. Can do. Since a gap is formed between the adjacent rollers of the full roller bearing, it is possible to support the roller by inserting a support portion into this gap and prevent the inner ring from falling off.

  Further, the support portion is inserted between the rollers on one end side in the axial direction of the inner ring raceway surface, and supports each roller in cooperation with a collar portion of the inner ring formed on the other end portion in the coaxial direction. It can be constituted as follows. In this case, it is not necessary to insert the support portion in a range extending over the entire axial direction of the roller, and it is sufficient to insert the support portion on one end side in the axial direction, so that the support portion can be configured compactly.

  The stopper is fitted to an annular base surface coaxial with the inner ring so as to be movable in the axial direction, and the support portion is inserted between the rollers by moving the stopper in the axial direction. It is preferable to be configured to be removable. According to this configuration, the support portion can be inserted between the rollers or the support portion can be detached from the rollers simply by fitting the stopper to the base surface and moving the stopper in the axial direction relative to the base surface. You can make it.

  Further, it is preferable that the roller drop-off preventing device includes positioning means for positioning the stopper at a position where the support portion is inserted between the rollers and a position where the support part is separated from the rollers. As a result, the support portion can be positioned by switching between the insertion position and the separation position between the rollers.

  The positioning means is formed on the base surface, and an engaging member provided in the stopper so as to be able to protrude and retract from the fitting surface of the stopper with respect to the base surface and biased in a direction protruding from the fitting surface, A first recess that engages with the engagement member when the support portion is inserted between the rollers and the base surface, and the engagement member is formed when the support portion is separated from the rollers. A second recess to be engaged. With such a configuration, the stopper can be easily moved in the axial direction, and can be easily positioned at a predetermined position.

  In this case, the first and second recesses can be configured as annular grooves formed in the base surface along the circumferential direction. In this case, even if the support portion is moved in the circumferential direction according to the position between the rollers, the engagement member can be engaged with the first and second recesses.

  According to the present invention, it is possible to prevent the roller from dropping from the inner ring in a state where the inner ring and the roller are separated from the outer ring by the roller drop prevention tool.

  FIG. 1 is a cross-sectional view of a full roller bearing 10 according to an embodiment of the present invention. The full roller bearing 10 is mainly used for supporting a main shaft of a wind power generator, and includes an inner ring 11, an outer ring 12, and a tapered roller 13. An inner ring raceway surface 14 is formed on the outer peripheral surface of the inner ring 11, and a small collar portion 15 is formed at one axial end portion (small diameter side) of the inner ring raceway surface 14, and a large diameter side axial end portion is formed. A large collar portion 16 is formed. An outer ring raceway surface 17 is formed on the inner peripheral surface of the outer ring 12. A plurality of tapered rollers 13 are provided between the inner ring raceway surface 14 and the outer ring raceway surface 17 so as to be able to roll. The full roller bearing 10 is not provided with a cage for holding the tapered rollers 13.

  In the full roller bearing 10, when the tapered roller 13 and the inner ring 11 are separated from the outer ring 12 (see FIG. 5B), a roller drop-off prevention tool 19 for preventing the tapered roller 13 from dropping off from the inner ring 11 is provided. Is provided. As shown in FIG. 2, the roller drop-off prevention tool 19 is provided on an annular base member 20 mounted on the outer peripheral surface of the inner ring 11 on the large collar portion 16 side, and an outer peripheral surface (base surface) 20 a of the base member 20. An annular stopper 21 is provided. The base member 20 is fixed to the inner ring 11 so as to be attachable / detachable by bolts or the like or not attachable / detachable by welding or the like.

  The stopper 21 includes an annular fitting portion 22 that is fitted to the outer peripheral surface 20 a of the base member 20, and a plurality of support portions 23 that protrude from the fitting portion 22 in the axial direction. The fitting portion 22 is fitted to the outer peripheral surface of the base member 20 so as to be slidable in the axial direction. The support portion 23 is formed by the P.P. C. It is arranged on the outer peripheral side from D (in the radial direction outside the center line O of the tapered roller 13), so that it does not contact the outer ring raceway surface 17 from the side surface on the tapered roller 13 side of the fitting portion 22 toward the tapered roller 13. Projecting in the axial direction.

  3 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 4 is a view taken along arrow B in FIG. The same number of support portions 23 as the tapered rollers 13 are provided, and are arranged at intervals in the circumferential direction so as to correspond to the spaces between the tapered rollers 13 (gap S). Moreover, the support part 23 is formed in the shape suitable for the substantially triangular clearance gap S formed between the tapered rollers 13, specifically, a cross-sectional triangle shape (triangular prism shape).

  The support portion 23 is inserted between the tapered rollers 13 by sliding the fitting portion 22 in the axial direction on the base member 20 (shown by a solid line in FIG. 2; hereinafter referred to as “insertion position”). In addition, it is possible to move between positions that are disengaged between the tapered rollers 13 (indicated by a two-dot chain line in FIG. 2; hereinafter referred to as “disengagement position”).

  The support portion 23 inserted between the tapered rollers 13 abuts on the outer peripheral surface of the tapered roller 13. When the inner ring 11 is removed from the outer ring 12 (see FIG. 5B), the support part 23 supports the tapered roller 13 together with the small brim part 15 (see FIG. 1), and the tapered roller 13 has a diameter from the inner ring 11. Prevents falling out of the direction.

As shown in FIG. 2, the roller drop prevention tool 19 includes positioning means 25 that positions the stopper 21 in a state in which the support portion 23 is in the insertion position and a state in which it is in the removal position. The positioning means 25 is a so-called ball detent mechanism, and has a bottomed holding hole 26 formed radially outward from the inner peripheral surface of the fitting portion 22, and an urging force inserted into the holding hole 26. A compression coil spring 27 as a member, a ball 28 as an engagement member inserted into the holding hole 26, and recesses 30 and 31 formed on the outer peripheral surface of the base member 20 and into which the ball 28 is fitted and engaged. I have. The ball 28 can protrude and retract with respect to the inner peripheral surface of the fitting portion 22, and is urged by a compression coil spring 27 in a direction protruding from the inner peripheral surface.
A plurality of holding holes 26 into which the compression coil springs 27 and the balls 28 are inserted are formed at intervals in the circumferential direction. Each holding hole 26 is disposed at the same position in the axial direction.

The recesses 30 and 31 include an insertion-side recess (first recess) 30 into which the ball 28 fits when the support portion 23 is placed at the insertion position, and a removal-side recess (first recess) into which the ball 28 fits when placed at the release position. 2 recesses) 31. The insertion-side recess 30 and the detachment-side recess 31 are annular grooves extending along the circumferential direction of the base member 20.
Therefore, when the fitting portion 22 is slid in the axial direction and the support portion 23 is disposed at the insertion position or the detachment position, the ball 28 is fitted into the insertion-side recess 30 or the detachment-side recess 31 and the support portion 23 is at each position. Positioned. In order to facilitate sliding of the fitting portion 22, the holding holes 26 into which the compression coil springs 27 and the balls 28 are inserted are preferably formed at three or more locations in the circumferential direction.

In the above configuration, when the full roller bearing 10 is assembled or disassembled, the support portion 23 is moved to the insertion position and inserted between the tapered rollers 13. Accordingly, each tapered roller 13 is supported by the small brim portion 15 and the support portion 23, and is prevented from falling off from the inner ring 11. Further, when the roller assembly 10 is used for supporting the main shaft after assembling the full complement roller bearing 10, the support portion 23 is moved to the disengagement position. Thus, the support portion 23 does not become an obstacle to the rotation of the inner ring 11 (rotation of the tapered roller 13).
Since the support portion 23 supports the tapered roller 13 in cooperation with the small brim portion 15, it is not necessary to form the support portion 23 long so as to cover the entire axial direction of the tapered roller 13. Can be made compact and short.

  Although the relative position in the circumferential direction between the tapered roller 13 and the inner ring 11 can be changed by rotation, in the present embodiment, the insertion-side recess 30 and the detachment-side recess 31 are annular grooves extending in the circumferential direction. Therefore, the support part 23 can be rotated in the circumferential direction in accordance with the position between the tapered rollers 13 with the axial position of the support part 23 being positioned at the disengagement position, and then the support part 23 is moved to the insertion position. By moving, the ball 28 can be securely fitted into the insertion-side recess 30. The insertion-side recess 30 and the detachment-side recess 31 may be formed in a spherical shape instead of a groove shape. In this case, by rotating the inner ring 11, the support portion 23 can be aligned with the position between the tapered rollers 13.

  When the detachable recess 31 is an annular groove, the groove bottom of the detachable recess 31 is partially deeply formed at the same position (interval) as the circumferential position (interval) of the plurality of holding holes 26. Is preferred. In this case, the stopper 21 is positioned in the circumferential direction with respect to the base member 20 by fitting the ball 28 inserted into the holding hole 26 into a deep portion of the groove bottom. Therefore, when the inner ring 11 rotates, the stopper 21 can be prevented from rotating relative to the inner ring 11 due to inertia. In particular, in this case, when the stopper 21 is moved in the circumferential direction with respect to the base member 20, all the balls 28 are fitted into deep portions of the groove bottoms. It is desirable to keep the direction interval constant.

  The stopper 21 may be fixed to the base member 20 so that the stopper 21 does not rotate relative to the inner ring 11 due to inertia. As a means for fixing the stopper 21, for example, there is a method in which a recess is formed on the contact surface between the stopper 21 and the base member 20 and a wedge member (key member) is inserted into the recess. As another means for fixing the stopper 21, there is a method in which a female screw is formed in the base member 20, a through hole is formed in the stopper 21, and a bolt inserted from the through hole is screwed into the female screw. In the case of these methods, the ball 28 is fitted into the detachable recess 31 to easily align the recessed portion of the stopper 21 and the recessed portion of the base member 20 and align the female screw and the through hole. be able to.

The present invention is not limited to the above-described embodiments, and the design can be changed as appropriate within the scope of the claims. For example, the base member 20 and the stopper 21 of the roller drop prevention tool 19 may be formed in an annular shape by connecting a plurality of segments in the circumferential direction.
The base member 20 of the roller drop prevention tool 19 may be formed integrally with the inner ring 11. Further, the base member 20 can be omitted. In this case, the stopper 21 is directly fitted to the outer peripheral surface of the inner ring 11 (in this case, the outer peripheral surface becomes the base surface) so as to be slidable in the axial direction, and the insertion-side concave portion 30 and the separation-side concave portion 31 are fitted to the outer peripheral surface. May be formed. Further, the holding hole 26 into which the compression coil spring 27 and the ball 28 are inserted may be formed at one place or two places with respect to the stopper 21.

  The roller drop prevention tool 19 may be attached to the inner ring 11 only when the full roller bearing 10 is assembled or disassembled, and may be removed from the inner ring 11 when the full roller bearing 10 is used. Thereby, the roller fall-off prevention tool 19 can be used also for another full roller bearing 10. In this case, the positioning means 25 for positioning the support portion 23 at the insertion position and the removal position may be unnecessary, and the roller drop-off prevention tool 19 is attached to the inner ring 11 so that the support portion 23 is inserted between the tapered rollers 13. It only has to be attached.

The roller drop-off prevention device 19 can be provided not only on the outer peripheral surface of the inner ring 11 on the large collar portion 16 side but also on the outer peripheral surface of the small collar portion 15 side. In this case, the tapered roller 13 can be supported by the support portion 23 and the large collar portion 16 of the stopper 21.
The shape of the support portion 23 of the stopper 21 is not limited to a triangular shape as long as it can be inserted between the tapered rollers 13 and can support the tapered rollers 13. Good.
The present invention can be applied not only to tapered roller bearings but also to cylindrical roller bearings.

It is sectional drawing of the full complement roller bearing which concerns on embodiment of this invention. It is an expanded sectional view of the principal part in the full roller bearing of FIG. It is AA sectional drawing of FIG. It is a B arrow line view of FIG. It is sectional drawing of the full complement roller bearing which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Full roller bearing 11 Inner ring 12 Outer ring 13 Tapered roller 14 Inner ring raceway surface 15 Small brim part 16 Large brim part 17 Outer ring raceway surface 19 Fall prevention tool 20 Base member 21 Stopper 23 Support part 25 Positioning means 28 Ball 30 Insertion side concave part (first 1 recess)
31 Detachment side recess (second recess)

Claims (8)

An outer ring having an outer ring raceway surface;
An inner ring having an inner ring raceway surface;
A plurality of full-roller rollers arranged to roll between the outer ring raceway surface and the inner ring raceway surface;
A roller fall-off prevention tool provided with a stopper that is attached to the inner ring and prevents the roller and the inner ring from falling off the inner ring in a state where the roller and the inner ring are separated from the outer ring. Full roller bearing.   The stopper is formed in an annular shape having the same axis as the inner ring, and includes a plurality of support portions that are inserted between the rollers to support the posture of the rollers at intervals in the circumferential direction. The full roller bearing according to claim 1.   The support portion is inserted between the rollers on one end side in the axial direction of the inner ring raceway surface, and cooperates with a flange portion of the inner ring formed on the other end portion in the coaxial direction of the inner ring raceway surface. The full roller bearing according to claim 2, wherein the roller is configured to support the roller. The stopper is fitted to an annular base surface having the same axis as the inner ring so as to be movable in the axial direction,
The full roller bearing according to claim 2 or 3, wherein the support portion is configured to be insertable / removable between the rollers by moving the stopper in the axial direction.   5. The full roller bearing according to claim 4, wherein the roller drop-off prevention device includes positioning means for positioning the stopper at a position where the support portion is inserted between the rollers and a position where the support portion is separated from the rollers. .   The positioning means is formed on the base surface and an engaging member provided on the stopper so as to be able to project and retract with respect to the fitting surface of the stopper with respect to the base surface, and biased in a direction protruding from the fitting surface. A first recess that engages with the engagement member when the support portion is inserted between the rollers, and the base surface, and the engagement when the support portion is separated from the rollers. The full roller bearing according to claim 5, further comprising a second recess with which the member engages.   The full roller bearing according to claim 6, wherein the first and second recesses are grooves formed in a circumferential direction on the base surface.   A stopper for a full roller bearing, comprising a stopper which is attached to an inner ring of the full roller bearing and prevents the roller from falling off from the inner ring in a state where the inner ring and the roller are separated from the outer ring of the full roller bearing. Roller fall prevention tool.

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