JP2011247294A - Rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing capable of suppressing poor lubrication based on the spatial deviation of lubricant caused by the self weight of the lubricant.SOLUTION: Blade parts 20 extend in an outward area in the radial direction from an outer circumferential surface of an annular part 17 of a holder 7. When a roller bearing is driven while the center axis of an inner ring extends substantially in the horizontal direction, a first state in which fore ends of the blade parts 20 are located on the side opposite to the rotational direction of the holder 7 from roots of the blade parts 20, and located on an inner circumferential surface of the outer ring with spacing therebetween, and a second state in which the fore ends of the blade parts 20 are brought into contact with the inner peripheral surface of the outer ring, or the position of the fore ends of the blade parts 20 in the radial direction of the holder 7 are same as the positions of the roots of the blade parts 20 in the radial direction can be changed each other.

Description

  The present invention relates to a rolling bearing, for example, a rolling bearing suitable for use in rotatably supporting a relatively low-speed rotating shaft such as a main shaft of a wind power generator.

  Conventionally, as a rolling bearing, there is a ball bearing described in JP-A-2002-372058 (Patent Document 1).

  The ball bearing includes an inner ring, an outer ring, a plurality of balls, and a crown type cage, and the plurality of balls are held by the crown type cage between the race groove of the inner ring and the race groove of the outer ring. Thus, they are arranged at intervals in the circumferential direction.

  The crown-shaped cage has one annular portion, a plurality of column portions, and a plurality of projections, and the annular portion, the plurality of column portions, and the plurality of projections are non-deformable rigid bodies that are the same. It is made of these materials and is integrally molded. Each said pillar part is extended in the substantially axial direction from one end surface of the axial direction of an annular part. An end surface on one side in the circumferential direction of each of the column portions has an arc shape. The plurality of column parts are located at intervals in the circumferential direction of the annular part.

  The surfaces facing the circumferential direction of the two column portions adjacent to each other in the circumferential direction together form an arc-shaped surface. Using this arc-shaped surface as a pocket, a ball is held in the pocket. Each of the protrusions extends outward in the radial direction from the outer peripheral surface of the annular portion.

  The conventional ball bearing adjusts the oil film thickness of the raceway groove to a constant level by scraping off excess grease existing between the inner ring and the outer ring at each of the protrusions.

  However, in the conventional ball bearing described above, the space for the arrangement of the grease generated by the weight of the grease when the rotating shaft on which the ball bearing is installed extends in the horizontal direction and the rotating shaft rotates at a low speed, etc. There is a problem that there is almost no effect of correcting the general bias, and there is almost no effect of suppressing poor lubrication based on the spatial bias of the grease arrangement.

Japanese Patent Laid-Open No. 2002-372058 (FIG. 3)

  Then, the subject of this invention is providing the rolling bearing which can suppress the poor lubrication based on the spatial bias of the lubricant by the dead weight of the lubricant.

In order to solve the above problems, the rolling bearing of the present invention is
An inner race member having a raceway surface;
An outer race member having a raceway surface;
A plurality of rolling elements disposed between the raceway surface of the inner raceway member and the raceway surface of the outer raceway member;
An annular portion, a plurality of column portions extending circumferentially from an axial end surface of the annular portion, and an outer circumferential surface of the annular portion extending radially outward of the annular portion And a cage for holding the rolling element between the two column portions adjacent in the circumferential direction.
When operating with the central axis of the inner raceway member extending in a substantially horizontal direction, the tip of the blade part is more than the root of the blade part while the cage rotates once. The first state, which is located on the opposite side to the rotation direction of the cage and is spaced from the inner circumferential surface of the outer race member, and the tip of the blade portion is the inner circumference of the outer race member Or a second state where the radial position of the retainer at the tip of the blade part is the same as the radial position of the root of the blade part. .

  The condition that “the radial position of the retainer at the tip of the blade part is the same as the radial position of the base of the blade part” is that the region constituting the tip of the blade part is a blade It shall be filled when it has the part which has overlapped with the diameter direction of a cage in the field which constitutes the root of a part.

  According to the present invention, since the blade part moves dynamically so that the first state and the second state can be taken, a mass of the lubricant below the vertical direction generated by the weight of the lubricant is generated. Can be dispersed by the blades. Therefore, the spatial deviation of the lubricant can be suppressed, and the lubricant can be arranged more spatially and uniformly.

  In the present invention, when the lubricant adhering to the tip of the blade portion can be rubbed against the inner peripheral surface of the outer race member in the second state, lubrication on the inner circumference side of the outer race member is performed. The performance can be greatly improved.

In one embodiment,
When operating with the central axis of the inner raceway member extending in a substantially horizontal direction, the tip of the blade part is more than the root of the blade part while the cage rotates once. A third state is adopted in which the cage is located on the rotational direction side and is located at an interval on the inner circumferential surface of the outer race member.

  According to the above embodiment, during one rotation of the cage, at least in the first state and the third state, the blade portion is not in contact with the outer track member, and the blade portion is not in contact with the outer track member. become longer. Therefore, the rotation of the cage is less likely to be hindered by the outer race member, resulting in smoother rolling of the rolling elements.

The rolling bearing of the present invention is
An inner race member having a raceway surface;
An outer race member having a raceway surface;
A plurality of rolling elements disposed between the raceway surface of the inner raceway member and the raceway surface of the outer raceway member;
The annular portion, a plurality of column portions extending circumferentially from the axial end surface of the annular portion, and the radially inner side of the annular portion from the inner peripheral surface of the annular portion And a cage that holds the rolling element between the two column portions adjacent in the circumferential direction.
When operating with the central axis of the inner raceway member extending in a substantially horizontal direction, the tip of the blade part is more than the root of the blade part while the cage rotates once. The first state, which is located on the opposite side to the rotation direction of the cage and is spaced from the outer circumferential surface of the inner race member, and the tip of the blade portion are located on the outer circumferential surface of the inner race member. It contacts, or the radial position of the said holder | retainer of the front-end | tip of the said blade | wing part takes the 2nd state which is the same as the said radial position of the base of the said blade | wing part.

  The condition that “the radial position of the retainer at the tip of the blade part is the same as the radial position of the base of the blade part” is that the region constituting the tip of the blade part is a blade It shall be satisfied when the region constituting the root of the portion has a portion overlapping in the radial direction of the cage.

  It is clear that the dynamic movement of the blade can be obtained either by attaching the blade part to the outer peripheral surface of the annular part of the cage or attaching the blade part to the inner peripheral surface of the annular part of the cage. It is.

  According to the present invention, as in the case where the blade portion is connected to the outer peripheral surface of the annular portion of the cage, the blade portion moves dynamically so as to take the first state and the second state. Therefore, the mass of the lubricant below the vertical direction generated by the weight of the lubricant can be dispersed by the blade portion. Therefore, the spatial deviation of the lubricant can be suppressed, and the lubricant can be arranged more spatially and uniformly.

  In the present invention, when the lubricant adhering to the tip of the blade portion can be rubbed against the outer peripheral surface of the inner race member in the second state, the lubrication performance on the outer circumference side of the inner race member is improved. It can be improved significantly.

In one embodiment,
When operating with the central axis of the inner raceway member extending in a substantially horizontal direction, the tip of the blade part is more than the root of the blade part while the cage rotates once. A third state is adopted in which the cage is located on the rotational direction side and is located at an interval on the outer circumferential surface of the inner race member.

  According to the above embodiment, during one rotation of the cage, at least in the first state and the third state, the blade portion is not in contact with the inner track member, and the blade portion is not in contact with the inner track member. become longer. Therefore, the rotation of the cage is less likely to be inhibited by the inner race member, and the rolling element is thereby smoothly rolled.

  According to the rolling bearing of the present invention, since the blade portion moves dynamically so that the first state and the second state can be taken, the mass of the lubricant below the vertical direction generated by the weight of the lubricant is reduced. The blades can disperse, can suppress the spatial bias of the lubricant, and can more evenly arrange the lubricant.

  Further, in the rolling bearing of the present invention, when the lubricant adhering to the tip of the blade portion can be rubbed against the peripheral surface of the race member (inner race member or outer race member) in the second state, The lubrication performance of the circumferential surface of the raceway member can be significantly improved.

It is a perspective view of the self-aligning roller bearing of one Embodiment of the rolling bearing of this invention. It is a figure when the holder | retainer mounted in the horizontal surface is seen from the outer side of radial direction. It is a figure when the holder | retainer which mounted the end surface of the one side of the axial direction of a 1st pillar part on the horizontal surface is seen from the other side of the axial direction of an annular part. It is an expansion perspective view of the fin part periphery of the holder | retainer shown in FIG. It is a fragmentary sectional view of the radial direction of the annular part of a cage shown in FIG. It is a perspective view of a part of a cage of a rolling bearing of a modified example in which the blade part is a structure that is not part of the fin part.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a self-aligning roller bearing according to an embodiment of the rolling bearing of the present invention. In FIG. 1, a self-aligning roller bearing (hereinafter simply referred to as a roller bearing) has a central axis extending in the horizontal direction, and the side indicated by arrow A in FIG. It is in the state located in the direction lower side.

  This roller bearing is used to rotatably support the main shaft extending in the horizontal direction of the wind turbine generator with respect to the housing of the wind turbine generator, and its usage environment (low speed rotation, variable load, vibration, wide temperature) Range) is set in an environment where lubricity is particularly important.

  This roller bearing includes an outer ring 1 as an outer race member, an inner ring 2 as an inner race member, a plurality of convex rollers (rollers) 3, and a cage (not shown in FIG. 1).

  The outer ring 1 is fitted and fixed to the inner peripheral surface of the housing of the wind power generator, while the inner ring 2 is fitted and fixed to the main shaft of the wind power generator. The outer ring 1 has an annular and spherical raceway surface over substantially the entire axial direction of the inner peripheral surface, and the inner ring 2 has an annular shape having substantially the same radius as the raceway surface of the outer ring 1 in a cross section including the axial center of the inner ring 2. The first raceway surface and the annular second raceway surface are respectively provided on one side of the outer peripheral surface of the inner ring 2 in the axial direction and the other side in the axial direction, and the radius of the spherical surface of the raceway surface of the outer ring 1 and the inner ring 2 The first raceway surface and the second raceway surface have substantially the same radius as the radius in the cross section including the axial centers. The plurality of convex rollers 3 are arranged in two rows in the axial direction. Specifically, the plurality of convex rollers 3 in one row are spaced apart from each other in the circumferential direction while being held by the cage between the raceway surface of the outer ring 1 and the first raceway surface of the inner ring 2. Are arranged. The other plurality of convex rollers 3 are disposed between the raceway surface of the outer ring 1 and the second raceway surface of the inner ring 2 at intervals in the circumferential direction while being held by the cage. ing. Grease as an example of a lubricant is enclosed between the inner peripheral surface of the outer ring 1 and the outer peripheral surface of the inner ring 2.

  This roller bearing is self-aligning because the center of the radius of the raceway surface of the outer ring 1 coincides with the center of the bearing. This roller bearing is preferably used when there is an inclination of the inner raceway member with respect to the outer raceway member caused by a mounting error with respect to the housing or a deflection of the shaft, such as when installed between the housing and the main shaft of the wind turbine generator. it can. This roller bearing has a large ability to apply a radial load, an axial load in both directions, and a composite load thereof, and is suitable for applications that receive vibration and impact loads.

  FIG. 2 is a view of the cage 7 placed on a horizontal plane when viewed from the outside in the radial direction.

  As shown in FIG. 2, the cage 7 includes an annular portion 17, a plurality of first pillar portions 18, a plurality of second pillar portions 19, and a plurality of rubber fin portions 29. Each of the first column portions 18 extends from one end face in the axial direction of the annular portion 17 to one side in the substantially axial direction, while each second column portion 19 is on the other side in the axial direction of the annular portion 17. It extends from the end face of the other side in the substantially axial direction. The plurality of first pillar portions 18 are spaced apart from each other in the circumferential direction of the annular portion 17, while the plurality of second pillar portions 19 are located spaced apart from each other in the circumferential direction of the annular portion 17. Yes.

  As shown in FIG. 2, in the circumferential direction of the annular portion 17, the first column portion 18 and the second column portion 19 are alternately positioned. Between the 1st pillar part 18 adjacent to the said circumferential direction is a pocket which accommodates the convex roller 3 (refer FIG. 1), Between the 2nd pillar parts 19 adjacent to the circumferential direction, the convex roller 3 ( It is a pocket 26 that accommodates (see FIG. 1).

  As shown in FIG. 2, the fin portions 29 are connected to the annular portion 17. The plurality of fin portions 29 are arranged at intervals in the circumferential direction of the annular portion 17. The fin portion 29 has a blade portion 20 that is a portion of the fin portion 29 that extends from the outer peripheral surface of the annular portion 17 to a radially outward region. The blade portion 20 is flexible enough to be bent downward in the vertical direction by its own weight. The length of the blade portion 20 in the extending direction is longer than the radial distance between the outer peripheral surface of the annular portion 17 of the cage 7 and the inner peripheral surface of the outer ring 1.

  FIG. 3 is a view of the cage 7 in which one axial end surface of the first column portion 18 is placed on a horizontal plane when viewed from the other axial side of the annular portion 17.

  As shown in FIG. 3, the cage 7 has four fin portions 29, and the four fin portions 29 are arranged at substantially equal intervals in the circumferential direction of the annular portion 17. As shown in FIG. 3, the blade portion 20 of each fin portion 29 extends in the radial direction of the annular portion 17 in a state where no weight is applied.

  FIG. 4 is an enlarged perspective view of the periphery of the blade portion 20 of the cage 7 shown in FIG.

  As shown in FIG. 4, the axial width of the cage 7 of the blade portion 20 is substantially equal to the axial width of the annular portion 17. Further, the cross section in the direction perpendicular to the extending direction of the blade part 20 at the tip of the blade part 20 is larger than the cross section in the direction perpendicular to the extending direction in the root part of the blade part 20.

  FIG. 5 is a partial cross-sectional view in the radial direction of the annular portion 17 of the cage 7 shown in FIG. 3, and shows a structure for attaching the fin portion 29 to the annular portion 17.

  As shown in FIG. 5, the annular portion 17 has a fin portion mounting hole 60 that is a through hole extending in the radial direction. Further, as shown in FIG. 5, each of the fin portions 29 has a block-shaped mounting portion 70 and a lubricant holding portion 71, and the lubricant holding portion 71 extends in the radial direction from the mounting portion 70. is doing.

  As shown in FIG. 5, the end portion of the block-like (substantially rectangular parallelepiped) mounting portion 70 on the radial side of the lubricant retaining portion 71 has a first protrusion 40 projecting to one side in the circumferential direction, It has the 2nd protrusion part 42 which protrudes in the other side of the circumferential direction. Further, the end of the block-shaped mounting portion 70 on the opposite side to the lubricant holding portion 71 side in the radial direction has a third projection 41 projecting on one side in the circumferential direction, and on the other side in the circumferential direction. It has the 4th projection part 43 which protrudes.

  The radial distance between the first protrusion 40 and the third protrusion 41 is substantially equal to the radial distance between the second protrusion 42 and the fourth protrusion 43, and the radial direction of the annular portion 17. The thickness is substantially equal. A concave portion 50 defined by the first protrusion 40 and the third protrusion 41 is present on one end surface in the circumferential direction of the mounting portion 70, and the other end surface in the circumferential direction of the mounting portion 70 is present on the end surface. There is a recess 51 defined by the second protrusion 42 and the fourth protrusion 43.

  The fin portion 29 is pushed into the fin portion mounting hole 60 by hand or machine from the mounting portion 70 side of the fin portion 29 and the radially outer side of the fin portion mounting hole 60, and the mounting portion 70 is inserted into the fin portion mounting hole. It is fixed to 60 securely and stably. The blade portion 20 includes a portion located on the radially outer side of the annular portion 17 in the fin portion 29 after the fin portion 29 is attached to the annular portion 17.

  When a conventional roller bearing is used to support a main shaft extending in the horizontal direction of a wind turbine generator so as to be rotatable with respect to the housing of the wind turbine generator, its usage environment (low-speed rotation, variable load, vibration, (Wide temperature range) makes it easier for lubricant (for example, grease) to accumulate on the lower side in the vertical direction between the inner race member and the outer race member. However, the rolling bearing of the present invention can greatly improve this problem. Hereinafter, this will be described with the operation of the blade portion 20 of the roller bearing of the above embodiment.

  In the configuration of the above-described embodiment, the roller bearing includes a roller bearing having a central axis of the roller bearing (coincident with the central axis of the outer ring 1 and the central axis of the inner ring 2) extending in a substantially horizontal direction. When the cage 7 is operated at a usable rotational speed in a state where the cage 7 is rotating with respect to the outer ring 1 (the stationary track member of the outer track member and the inner track member), the blade portion 20 is It works as follows.

  First, when the blade portion 20 is positioned below in the vertical direction, the blade portion 20 is caused by the low rotational speed of the roller bearing in the space between the inner and outer rings 1 and 2. The grease adheres to the blade portion 20 in contact with the grease located on the relatively lower side in the vertical direction under its own weight.

  Thereafter, when the blade part 20 moves upward from the lower side in the vertical direction along with the rotation of the cage 7, the blade part 20 is rotated by the weight of the blade part 20 due to its own weight. The blade 20 is bent on the opposite side (vertical direction lower side) to the first state in which the blade portion 20 extends in the substantially tangential direction of the outer peripheral surface of the annular portion 17. In this first state, the blade portion 20 is located at an interval on the inner peripheral surface of the outer ring 1.

  Subsequently, near the position where the blade portion 20 exceeds the uppermost position in the vertical direction, the blade portion 20 falls on the rotational direction side of the cage 7 due to its own weight. At that time, the tip of the blade portion 20 comes into contact with the inner peripheral surface of the outer ring 1, and the grease adhering to the tip portion of the blade portion 20 is rubbed against the inner peripheral surface of the outer ring 1. The state where the blade portion 20 is in contact with the inner peripheral surface of the outer ring 1 constitutes the second state.

  After the blade portion 20 contacts the inner peripheral surface of the outer ring 1, the tip of the blade portion 20 is bent to the rotation side (vertical direction lower side) of the cage 7, and the blade portion 20 is the outer periphery of the annular portion 17. It will be in the 3rd state extended in the substantially tangential direction of the surface. In the third state, the blade portion 20 is located at an interval on the inner peripheral surface of the outer ring 1.

  After that, the blade portion 20 is in a region near the lower part in the vertical direction and comes into contact with the grease existing in the vicinity thereof so that the grease flows, and then the first state is repeated again. It has become.

  According to the roller bearing of the above-described embodiment, the blade portion 20 moves dynamically so that the first state and the second state can be taken. A lump of grease can be dispersed by the blade portion 20. Therefore, the spatial bias of the grease can be suppressed, and the grease can be arranged more spatially and uniformly.

  Moreover, according to the roller bearing of the said embodiment, since the grease adhering to the front-end | tip of the blade | wing part 20 can be rubbed on the inner peripheral surface of the outer ring 1 in the said 2nd state, Lubrication performance can be significantly improved.

  Moreover, according to the roller bearing of the said embodiment, since the blade | wing part 20 is non-contact with the outer ring 1 in the 1st state and 3rd state which occupy most states, rotation of the holder | retainer 7 is obstructed by the outer ring 1. It becomes difficult to be made smooth, and due to this, the rolling of the convex roller 3 becomes smoother.

  In the roller bearing of the above embodiment, the blade portion 20 extends from the outer peripheral surface of the annular portion 17 of the cage 7. In the present invention, the blade portion is a diameter of the column portion of the cage. The structure may extend from the end face on the outer side in the direction to the region on the outer side in the radial direction. In this case, since the inner peripheral surface of the outer ring whose lubricity is improved by the blade portion corresponds to the raceway surface of the outer ring which is the sliding portion, the seizure suppression effect can be made particularly excellent. .

  In the roller bearing of the above embodiment, in the second state, the blade portion 20 is in contact with the inner peripheral surface of the outer ring 1. In the present invention, in the second state, the blade portion is in contact with the inner peripheral surface of the outer ring. The structure which does not contact may be sufficient. Even in this case, the effect of allowing the grease to adhere to the inner peripheral surface of the outer ring can be expected by splashing off the grease adhering to the blade portion. Also, even when grease cannot adhere to the inner peripheral surface of the outer race member, it is possible to ensure the dynamic movement of the blades to such an extent that the radial dimension of the cage changes. Lubricant that tends to accumulate downward can be flowed greatly, and the spatial bias of the presence of the lubricant can be improved.

  In the roller bearing of the above embodiment, the third state exists, the blade portion 20 extends substantially in the tangential direction in the rotational direction of the cage 7, and is spaced from the inner peripheral surface of the outer ring 1. There was a state of keeping. However, in this invention, the blade portion is maintained from the position in the vicinity of the uppermost position in the vertical direction to the position in the lower direction in the vertical direction while maintaining the second state where the blade portion is in contact with the inner peripheral surface of the outer race member. It may move with the rotation of the vessel, and the third state may not exist.

  Further, in the roller bearing of the above embodiment, the cage 7 has a structure in which the column portions 18 and 19 extend from the end surfaces on both sides in the axial direction of the single annular portion 17. The vessel may have a structure of a crown type cage, or may have a structure in which two annular portions are connected by a plurality of pillars.

  Moreover, in the roller bearing of the said embodiment, although the number of the blade | wing parts 20 was four, in this invention, the number of blade | wing parts may be natural numbers other than four.

  In the roller bearing of the above embodiment, the cage 7 is configured to hold the convex rollers 3 in two rows in the axial direction. However, in this invention, the cage holds the rolling elements in a row in the axial direction. It may be a configuration.

  Further, in the roller bearing of the above-described embodiment, the blade portion is configured by a part of the flexible and flexible rubber fin portion 29. In the present invention, the blade portion is in the first state and the first state. Any structure may be used as long as it can form two states.

  FIG. 6 is a perspective view of a part of a cage of a rolling bearing of a modified example in which the blade part is a structure that is not a part of the fin part.

  As shown in FIG. 6, in this modification, the blade portion 120 includes a plate-like cage fixing portion 130, a plate-like normal extending portion 131, and a turning portion 132. The cage fixing part 130 may be flat or curved. The cage fixing portion 130 is fixed to the outer peripheral surface of the annular portion 117 of the cage 107 with a plurality of screws 133. Each of the screws 133 penetrates the annular portion 117 of the cage 107 in the radial direction, and the end portion on the inner peripheral side of the cage 107 of the screw 133 is caulked. In this way, the cage fixing portion 130 is securely fixed to the annular portion 117.

  The normal extending portion 131 extends from the surface of the plate-like cage fixing portion 130 on the side opposite to the cage side in a substantially normal direction of the surface. The normal extending part 131 is configured integrally with the cage fixing part 130. The surface of the side surface 140 of the normal extending portion 131 has a substantially rectangular shape. The turning part 132 is connected to the normal extension part 131 via a hinge (hinge structure). The turning portion 132 can turn around the end 141 on the opposite side of the normal extension portion 131 from the cage fixing portion 130 side. By forming the blade part 120 in this way, the swivel part 132 is positioned on the rotation direction side of the cage 107 from the side opposite to the rotation direction of the cage 107 and the substantially tangential direction of the annular portion 117 of the cage 107. And the position to the substantially tangential direction of the annular part 117 of the holder | retainer 107 can be freely taken now with the dead weight. In this way, the rolling bearing of the modified example can take the first state and the second state, or can take the first state, the second state, and the third state. It can be done.

  In the above modification, the turning portion 132 is configured to be rotatable with a hinge structure. However, in the present invention, the turning portion may be configured to be rotatable using a bearing.

  Further, in the above embodiment and the above modification, the blade portions 20 and 120 extend from the outer peripheral side of the cages 7 and 107 to the radially outward region. The structure may extend from the inner peripheral side of the cage to the radially inner region. In this case, when the blade portion moves in the upper direction in the vertical direction similar to the movement of the ferris wheel, and the blade portion is located at the uppermost position in the vertical direction, the blade portion and the outer peripheral surface of the inner track member Is the minimum (including zero). Therefore, when the distance in the extending direction of the blade portion is larger than the radial distance between the inner track member and the outer track member, the lubrication adhered to the blade portion when the blade portion is positioned on the lower side in the vertical direction. The agent can be rubbed against the outer peripheral surface of the inner track member when the blade portion contacts the outer peripheral surface of the inner track member, such as when the blade portion is positioned at the uppermost position in the vertical direction. Therefore, the lubrication characteristic of the outer peripheral surface of the inner race member can be improved. Moreover, even when the blade portion does not contact the outer peripheral surface of the inner ring, it can be expected that the lubricant attached to the blade portion adheres and falls to the inner ring side by its own weight. In any case, since the dynamic movement of the blade portion can be ensured to such an extent that the radial dimension of the cage changes, it is possible to greatly flow the lubricant that tends to accumulate downward in the vertical direction as compared with the conventional case. This can greatly improve the spatial bias of the presence of the lubricant.

  Moreover, in the said embodiment and modification, although the rolling element was the convex roller (roller-shaped roller) 3, in this invention, a cylindrical roller, a tapered roller, a ball | bowl, etc. may be sufficient, A rolling element other than the convex roller may be used.

  In addition, it cannot be overemphasized that the rolling bearing of this invention can be used for the use which supports the rotating shaft which rotates at high speed rotatably. Further, it goes without saying that the rolling bearing of the present invention can be used in an environment where the central axis of the rolling bearing extends in a direction inclined in the horizontal direction. Even in this case, the lubricant can be largely flowed by the dynamic movement of the blade portion. Needless to say, the lubricant that can be used in the present invention is not limited to grease, but may be lubricating oil, cleaning liquid, or other existing lubricants.

DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Convex roller 7,107 Cage 17,117 Annular part 18 First pillar part 19 Second pillar part 20,120 Blade part

Claims (4)

An inner race member having a raceway surface;
An outer race member having a raceway surface;
A plurality of rolling elements disposed between the raceway surface of the inner raceway member and the raceway surface of the outer raceway member;
An annular portion, a plurality of column portions extending circumferentially from an axial end surface of the annular portion, and an outer circumferential surface of the annular portion extending radially outward of the annular portion And a cage for holding the rolling element between the two column portions adjacent in the circumferential direction.
When operating with the central axis of the inner raceway member extending in a substantially horizontal direction, the tip of the blade part is more than the root of the blade part while the cage rotates once. The first state, which is located on the opposite side to the rotation direction of the cage and is spaced from the inner circumferential surface of the outer race member, and the tip of the blade portion is the inner circumference of the outer race member Or a second state in which the radial position of the cage at the tip of the blade part is the same as the radial position of the root of the blade part. Rolling bearing. The rolling bearing according to claim 1,
When operating with the central axis of the inner raceway member extending in a substantially horizontal direction, the tip of the blade part is more than the root of the blade part while the cage rotates once. A rolling bearing having a third state in which the cage is positioned on the rotational direction side of the cage and is positioned at an interval on the inner peripheral surface of the outer race member. An inner race member having a raceway surface;
An outer race member having a raceway surface;
A plurality of rolling elements disposed between the raceway surface of the inner raceway member and the raceway surface of the outer raceway member;
The annular portion, a plurality of column portions extending circumferentially from the axial end surface of the annular portion, and the radially inner side of the annular portion from the inner peripheral surface of the annular portion And a cage that holds the rolling element between the two column portions adjacent in the circumferential direction.
When operating with the central axis of the inner raceway member extending in a substantially horizontal direction, the tip of the blade part is more than the root of the blade part while the cage rotates once. The first state, which is located on the opposite side to the rotation direction of the cage and is spaced from the outer circumferential surface of the inner race member, and the tip of the blade portion are located on the outer circumferential surface of the inner race member. A rolling bearing having a second state in which the radial position of the cage at the tip of the blade part is in contact with the radial position of the root of the blade part. . In the rolling bearing according to claim 3,
When operating with the central axis of the inner raceway member extending in a substantially horizontal direction, the tip of the blade part is more than the root of the blade part while the cage rotates once. A rolling bearing having a third state in which the cage is located on the rotational direction side of the cage and is located at an interval on the outer peripheral surface of the inner race member.

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