JP2020159376A - Segment cage for roller bearing and roller bearing - Google Patents

Abstract

To provide a segment cage for a roller bearing which is of a roller guide type and compact in size, can cope with the enlargement of the bearing, and can reduce a cost, and the roller bearing.SOLUTION: A cage 5 is of a roller guide type and composed of a plurality of pieces of cage segments 6 which are arranged in an annular shape. In each of the cage segments 6, a pocket Pt is formed of adjacent column parts 7 and a pair of connecting parts between the adjacent column parts 7, 7. In each column part 7, a guide claw 10 having a guide face for guiding rollers 4 which are accommodated in the pocket Pt, and protruding to an outside diameter side or an inside diameter side from the column part 7 is arranged. A pair of guide claws 10, 10 protruding to the outside diameter side and a pair of guide rollers 10, 10 protruding to the inside diameter side are alternately arranged in each pocket Pt along a peripheral direction with respect to arrangement bodies of the plurality of pieces of cage segments 6, and an engagement part 11 and an engaged part 12 which are engaged with each other in a radial direction are arranged at the adjacent column parts 7, 7 of the adjacent cage segments 6, 6 in the peripheral direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a segment cage for roller bearings and roller bearings, and relates to a technique applied to large roller bearings, for example, spindle bearings in wind power generators such as offshore wind turbines and roller bearings used in industrial machinery.

Currently, the size of wind power generators such as offshore wind turbines is increasing. Along with the increase in size of wind turbines, the size of spindle bearings that support the spindle to which the blade is attached is also increasing. Such bearings also have large components, which makes it difficult to produce and assemble the parts. For this reason, it has been proposed that the cage be divided into a plurality of cage segments.
In addition, in bearings used in various industrial machines, a cage segment may be used in large bearings.

There are two types of guides for the cage, the raceway ring guide type and the roller guide type. In the cage segment, unlike the one-piece ring-shaped cage, each cage segment moves individually, so the rollers are more than the raceway ring guide. The guide type is preferable because it can suppress defects and collision noise due to contact with the raceway wheels.

As shown in FIG. 14, the conventional roller guide type cage segment includes a plurality of pillars 38 extending along the axis so as to form pockets 37a, 37b, 37c for accommodating the rollers 39, and a plurality of the pillars 38. It includes a connecting portion (not shown) extending in the circumferential direction so as to connect the pillar portion 38 (for example, Patent Document 1). On the outer diameter side of the pillars 38 located on both sides of the first pockets 37a and 37c in the circumferential direction, the outer diameter side roller stopper that restricts the movement of the rollers 39 housed in the first pockets 37a and 37c to the outer diameter side. A portion 40a is provided. On the inner diameter side of the pillar portion 38 located on both sides of the second pocket 37b in the circumferential direction, an inner diameter side roller stopper 40b that restricts the movement of the roller 39 housed in the second pocket 37b to the inner diameter side is provided. .. As a result, the cage segment becomes a roller guide.

As another conventional roller guide type cage segment, a plurality of retainers are provided on the inner surface of the column portion, and these retainers come into contact with the outer peripheral surface of the tapered roller to obtain the radial direction of the cage segment. A technique for positioning and the like has been proposed (Patent Document 2).

JP-A-2007-170538 Japanese Patent No. 6323037

In the cage segment having three or more pockets as in Patent Document 1, the size is large, so that the equipment that can be manufactured is limited. As the number of pockets increases, the volume of the cage segment increases, requiring a larger resin molding machine. Large molding machines are uncommon and expensive, and there is concern about cost increase when using such molding machines.

In Patent Document 2, since the roller is held inside the cage, the cage rotates in the circumferential direction of the roller, but does not fall in the radial direction. However, in that case, it is necessary to forcibly push the rollers between the holding portions by using the elastic deformation of the cage segment, so-called "clicking". For this reason, the cage segment needs to be made of a material that can withstand elastic deformation, and equipment for elastically deforming the cage segment is required. Therefore, the manufacturing cost of the cage increases.

An object of the present invention is to provide a segment cage for roller bearings and roller bearings which are compact and have a roller guide type, can cope with an increase in size of bearings, and can reduce costs.

The segment cage for roller bearings of the present invention is a roller guide type segment cage for roller bearings, which is composed of a plurality of cage segments arranged in an annular shape.
Each of the cage segments includes a plurality of pillars extending in the axial direction and a pair of connecting portions extending in the circumferential direction to connect the plurality of pillars, respectively, and the plurality of pillars and the pair of connecting portions. A pocket for holding the roller is formed between the adjacent pillars, and each pillar has a guide surface for guiding the outer peripheral surface of the roller housed in the pocket. A guide claw that protrudes from the outer diameter side or the inner diameter side is provided.
For an array of the plurality of cage segments arranged in an annular shape, a pair of guide claws protruding toward the outer diameter side and a pair of guide claws protruding toward the inner diameter side are provided for each pocket along the circumferential direction. The column portions adjacent to the cage segments adjacent to each other in the circumferential direction are provided with engaging portions and engaged portions that are alternately arranged in the radial direction.

If the guide claw that guides the rollers is only on the inner diameter side, the cage segment will fall off to the inner diameter side, and if the guide claw is only on the outer diameter side, the cage segment will fall off to the outer diameter side.
Therefore, according to this configuration, the protruding directions of the pair of guide claws are alternately arranged for each pocket, and the adjacent pillar portions are provided with engaging portions and engaged portions that engage with each other in the radial direction. Therefore, the cage segment is held on either the inner diameter side or the outer diameter side without falling off, and the roller guide type is established.

In this case, since a cage segment having at least one pocket is sufficient, it can be made more compact than the conventional cage segment having three or more pockets, and the bearing can be freely increased in size. Since each roller is guided by the guide surface of a pair of guide claws, it is not necessary to insert the roller into the cage segment, and a simple gap insertion can be performed. Therefore, it is possible to select a highly versatile material as the cage segment, and it is possible to reduce the manufacturing cost of the cage segment because equipment for elastically deforming the cage segment is not required.

The direction in which the engaging portion engages with the engaged portion may be the same as the protruding direction of the guide claw in the pillar portion where the engaging portion is provided. In this case, even if the cage segment tries to fall off in the protruding direction of the guide claw, the engaging portion of the cage segment is supported by the engaged portion of the adjacent cage segment, and the engaging portion of the adjacent cage segment is supported. Since the guide claws project in a direction different from the above, the cage segment is prevented from falling off. In this way, the engaging portion and the engaged portion and the guide claws of the adjacent cage segments cooperate with each other to reliably and easily prevent the cage segment from falling off.

The engaging portion is a convex portion that protrudes in the circumferential direction at the circumferential end portion of the pillar portion, and the engaged portion is a circumferential end portion of the pillar portion adjacent to the pillar portion. It may be an engaging recess. With such convex portions and concave portions, an engaging portion and an engaged portion that engage with each other in the radial direction can be easily formed.

The engaging portion is a tapered portion that inclines outward in the radial direction toward the tip at the circumferential end portion of the pillar portion, and the engaged portion is a circumferential end of the pillar portion adjacent to the pillar portion. The portion may be a tapered portion that inclines inward in the radial direction toward the tip so that the tapered portion engages. With these tapered portions, an engaging portion and an engaged portion that engage with each other in the radial direction can be easily formed.

A pocket gap is provided between the roller and the pocket, and the tip of the engaging portion and the base end of the engaged portion are provided in a state where each cage segment is offset toward the outer diameter side by the pocket clearance. The final gap between the gaps may be smaller than the circumferential length of the engaged portion. By setting the final clearance as in this configuration, even if each cage segment moves individually during the operation of the roller bearing, the engaged state between the engaged portion and the engaged portion is maintained, and the cage segment. Can be prevented from falling off undesirably.

The pair of connecting portions may have an arc shape or a straight shape. When the pair of connecting portions have an arc shape, for example, the pair of connecting portions have a shape corresponding to the size of the roller bearing, and a cage segment having optimum dimensions corresponding to the roller bearing can be realized. However, in a segment cage having one pocket, when the pair of connecting portions has an arc shape, there are two types of segments having a cage having a guide claw on the convex side of the arc and a guide claw on the concave side of the arc. A cage is required. Therefore, in a segment cage having one pocket, when the pair of connecting portions has a straight shape, each segment cage can be of one type.

The roller bearing of the present invention includes an inner ring, an outer ring, a plurality of rollers interposed between the inner ring and the outer ring, and a segment cage for a roller bearing according to any one of the present inventions for holding the plurality of rollers. ing. According to the roller bearing having this configuration, the above-mentioned actions and effects described for the roller bearing segment cage of the present invention can be obtained.

The roller bearing segment cage of the present invention is a roller guide type roller bearing segment cage composed of a plurality of cage segments arranged in an annular shape, and each cage segment extends in the axial direction. A plurality of pillars and a pair of connecting portions extending in the circumferential direction to connect the plurality of pillars are provided, and the plurality of pillars and the pair of connecting portions are located between adjacent pillars. A pocket for holding the roller is formed, and each pillar portion has a guide surface for guiding the outer peripheral surface of the roller housed in the pocket, and a guide projecting from each pillar portion toward the outer diameter side or the inner diameter side. For an array of the plurality of cage segments provided with claws and arranged in an annular shape, a pair of guide claws protruding toward the outer diameter side and a pair of guide claws protruding toward the inner diameter side are provided in the circumferential direction. The pillars adjacent to the cage segments adjacent to each other in the circumferential direction are provided with engaging portions and engaged portions that engage with each other in the radial direction. For this reason, it is compact and has a roller guide type, can cope with an increase in bearing size, and can reduce costs.

The roller bearing of the present invention includes an inner ring, an outer ring, a plurality of rollers interposed between the inner ring and the outer ring, and a segment cage for a roller bearing according to any one of the present inventions for holding the plurality of rollers. Therefore, it is compact and has a roller guide type, can cope with an increase in bearing size, and can reduce costs.

It is a partial fracture side view of the roller bearing provided with the segment cage for a roller bearing which concerns on embodiment of this invention. It is a partial front view of the roller bearing provided with the segment cage for the same roller bearing. It is a partial perspective view which omitted the outer ring of the same roller bearing. It is a perspective view of the segment cage for the same roller bearing which accommodated a roller. It is a perspective view of each cage segment of the segment cage for the same roller bearing. 5 (a) is a view taken along the line VI (a) and FIG. 5 (b) is a view taken along the line VII (a) and FIG. 5 (b) is a view taken along the line VII (b). It is a partial front view which shows the engaging part and the engaged part of the segment cage for the same roller bearing. It is a partial front view which shows the engaging part and the engaged part of the segment cage for a roller bearing which concerns on another embodiment of this invention. It is a partial front view of the segment cage for a roller bearing which concerns on still another embodiment of this invention. It is a partial front view which shows the assembly method of the segment cage for the same roller bearing. It is a notch perspective view of the wind power generation apparatus using the roller bearing which concerns on any embodiment of this invention. It is sectional drawing of the turntable device using the roller bearing which concerns on still another Embodiment of this invention. It is sectional drawing which shows an example of the conventional cage segment.

[First Embodiment]
A roller bearing provided with a segment cage for a roller bearing according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8.
<Roller bearing>
As shown in FIGS. 1 and 2, the roller bearing 1 is a roller bearing segment cage that holds a plurality of rollers 4 interposed between the inner ring 2, the outer ring 3, the inner and outer rings 2, and 3, and the plurality of rollers 4. 5 is provided. The segment cage 5 for roller bearings may be simply referred to as a cage 5. This embodiment is an example in which the roller bearing 1 is applied to a tapered roller bearing, and the roller 4 is a tapered roller 4. The roller bearing 1 may be applied to a cylindrical roller bearing (not shown).

A tapered raceway surface 2a is provided on the outer peripheral surface of the inner ring 2, and a tapered raceway surface 3a is provided on the inner peripheral surface of the outer ring 3. The plurality of tapered rollers 4 are rotatably arranged between the raceway surfaces 2a and 3a, and a tapered rolling surface is formed on the outer peripheral surface of each tapered roller 4. The cage 5 holds a plurality of tapered rollers 4 at regular intervals in the circumferential direction. The inner and outer rings 2 and 3 and the tapered rollers 4 are made of, for example, bearing steel, stainless steel, or the like. A small brim 2b is provided on the outer peripheral surface of the inner ring 2 adjacent to the small diameter side portion of the raceway surface 2a, and a large brim 2c is provided on the portion adjacent to the large diameter side portion of the raceway surface 2a.

<About cage 5>
As shown in FIGS. 2 and 3, the cage 5 is a roller-guided cage composed of a plurality of cage segments 6 arranged in an annular shape. Each cage segment 6 has the same shape made of, for example, a synthetic resin, and is molded by the same mold. However, the plurality of cage segments 6 are incorporated so that the directions in which they are arranged in the roller bearing 1 are different from each other along the circumferential direction as described later.

As shown in FIGS. 2 and 4, each cage segment 6 has one pocket Pt for holding the rollers 4. Each cage segment 6 includes a plurality of (two in this example) pillar portions 7 extending in the axial direction, and a pair of connecting portions 9 and 9 extending in the circumferential direction to connect the plurality of pillar portions 7, respectively. .. A pocket Pt for holding the one roller 4 is formed between the plurality of pillar portions 7 and the pair of connecting portions 9, 9 adjacent pillar portions 7, 7. The pair of connecting portions 9, 9 may have an arc shape along a pitch circle, which is a circle connecting the roller center positions of the roller arrangement, or may have a straight shape. As shown in FIG. 3, each pillar portion 7 has a side surface forming the pocket Pt tapered so as to be along the peripheral surface of the conical roller 4.

As shown in FIGS. 4 and 5, each pillar portion 7 is provided with a guide claw 10 projecting to the outer diameter side or the inner diameter side. The guide claw 10 has a guide surface 10a that guides the outer peripheral surface of the roller 4 housed in the pocket Pt. As shown in FIGS. 2, 6 and 7, a pair of guide claws 10 and 10 projecting to the outer diameter side and a pair of guide claws 10 and 10 projecting to the inner diameter side of the array of a plurality of cage segments 6 arranged in an annular shape. A pair of guide claws 10 and 10 are alternately arranged for each pocket Pt along the circumferential direction.

As shown in FIGS. 4 and 5, the inner side surface of each guide claw 10 is a tubular guide surface 10a that is continuous with the inner side surface of the pillar portion 7 and is along the outer peripheral surface of the roller 4. Since the outer peripheral surface of the roller 4 of the tubular guide surface 10a is conical, it is specifically referred to as a conical tubular surface. When the outer peripheral surface of the roller 4 is cylindrical, the guide surface of the guide claw 10 is cylindrical.
As shown in FIG. 2, engaging portions 11 and engaged portions 12 that engage with each other in the radial direction are provided on the adjacent pillar portions 7 and 7 of the cage segments 6 that are adjacent in the circumferential direction.

<Detailed structure of engaging portion 11 and engaged portion 12>
As shown in FIG. 8, the direction in which the engaging portion 11 engages with the engaged portion 12 is the same as the protruding direction of the guide claws 10 and 10 in the pillar portion 7 in which the engaging portion 11 is provided. .. The engaging portion 11 is a convex portion protruding in the circumferential direction at the circumferential end portion of the pillar portion 7, and the engaged portion 12 is the convex portion at the circumferential end portion of the pillar portion 7 adjacent to the pillar portion 7. It is a recess with which the parts engage.

Assuming that the convex portion protruding to the left from the pillar portion 7 of the right cage segment 6 in FIG. 8 is the engaging portion 11, the engaged portion 12 which is the concave portion to be engaged with the engaging portion 11 is on the left side. It is a portion protruding to the right side from the pillar portion 7 of the cage segment 6 of the above. On the contrary, when the convex portion protruding to the right from the pillar portion 7 of the cage segment 6 on the left side in FIG. 8 is used as the engaging portion 11, the engaged portion 12 is a concave portion to be engaged with the engaging portion 11. Is a portion protruding to the left from the pillar portion 7 of the cage segment 6 on the right side. The step portion 11a provided on the inner surface or the outer surface of the engaging portion 11 and the step portion 12a provided on the outer surface or the inner surface of the engaged portion 12 engage with each other in the radial direction.

A pocket clearance is provided between the roller 4 and the pocket Pt, and the tip of the engaging portion 11 and the base of the engaged portion 12 are provided with each cage segment 6 offset to the outer diameter side by the pocket clearance. The final clearance x between the ends is set to be smaller than the circumferential length a of the engaged portion 12. By setting the final clearance x in this way, even if each cage segment 6 moves individually during the operation of the roller bearing, the engaged state between the engaging portion 11 and the engaged portion 12 is maintained and held. It is possible to prevent the vessel segment 6 from undesirably falling off.

<Action effect>
If the guide claw that guides the rollers is only on the inner diameter side, the cage segment falls off to the inner diameter side, and if the guide claw is only on the outer diameter side, the cage segment falls off to the outer diameter side.
Therefore, according to the cage 5, the protruding directions of the pair of guide claws 10 and 10 are alternately arranged for each pocket Pt, and the engaging portions 11 that engage with the adjacent pillar portions 7 and 7 in the radial direction. And an engaged portion 12 is provided. Therefore, the cage segment 6 holds the roller 4 on either the inner diameter side or the outer diameter side without falling off, and the roller guide type is established.

In this case, since the cage segment 6 having at least one pocket Pt is sufficient, it can be made more compact than the conventional cage segment having three or more pockets, and the bearing can be freely increased in size. it can. Since each roller 4 is guided by the guide surfaces 10a and 10a of the pair of guide claws 10 and 10, it is not necessary to insert the roller 4 into the cage segment 6 and a simple gap insertion can be performed. Therefore, it is possible to select a highly versatile material for the cage segment 6, and it is possible to reduce the manufacturing cost of the cage segment 6 because equipment for elastically deforming the cage segment 6 is not required. it can.

Since the direction in which the engaging portion 11 engages with the engaged portion 12 is the same as the protruding direction of the guide claw 10 in the pillar portion 7 where the engaging portion 11 is provided, the cage segment 6 has the guide claw. Even if the cage 10 is attempted to fall off in the protruding direction, the engaging portion 11 of the cage segment 6 is supported by the engaged portion 12 of the adjacent cage segment 6, and the guide claw 10 of the adjacent cage segment 6 is supported. Protrudes in a direction different from the above, so that the cage segment 6 is prevented from falling off. In this way, the engaging portion 11 and the engaged portion 12 and the guide claw 10 of the adjacent cage segment 6 cooperate with each other to reliably and easily prevent the cage segment 6 from falling off.

<About other embodiments>
In the following description, the same reference numerals will be given to the parts corresponding to the matters previously described in each embodiment, and duplicate description will be omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described above unless otherwise specified. It produces the same action and effect from the same configuration. In addition to the combination of the parts specifically described in each embodiment, it is also possible to partially combine the embodiments as long as the combination does not cause any trouble.

As shown in FIG. 9, the engaging portion 11 may be a tapered portion that is inclined outward in the radial direction toward the tip at the peripheral end portion of the pillar portion 7. In this case, the engaged portion 12 is a peripheral end portion of the pillar portion 7 adjacent to the pillar portion 7, and is a tapered portion that inclines inward in the radial direction toward the tip so that the tapered portion engages. Is. Also in the case of FIG. 9, in a state where each cage segment 6A is offset to the outer diameter side by the pocket clearance, the final clearance x between the tip of the engaging portion 11 and the base end of the engaged portion 12 is determined. It is set to be smaller than the circumferential length a of the engaged portion 12. With these tapered portions, the engaging portion 11 and the engaged portion 12 that engage with each other in the radial direction can be easily formed. Other than that, it has the same effect as that of the above-described embodiment.

As shown in FIG. 10, each cage segment 6B may include two pockets Pt. In this case, the cage segment 6B has two column portions 7 and 7 on both end sides extending in the axial direction at both ends in the circumferential direction, and one vertically extending between the two pockets Pt and Pt. The two pockets Pt and Pt are formed by a central pillar portion 7 and a pair of connecting portions 9 and 9 extending in the circumferential direction at both ends in the axial direction to connect the three pillar portions 7. There is. Each pillar portion 7 has a side surface forming the pocket Pt tapered so as to follow the peripheral surface of the conical roller 4.

In the cage segment 6B, a pair of guide claws 10 and 10 protruding toward the outer diameter side and a pair of guide claws 10 and 10 protruding toward the inner diameter side are alternately arranged for each pocket Pt along the circumferential direction. There is. Guide claws 10 and 10 projecting from the central pillar portion 7 in opposite directions to the inside and outside are provided, and the guide claws 10 and 10 form a pair with the guide claw 10 projecting from the pillar portion 7 on either end side. .. For example, in the cage segment 6B on the left side of FIG. 10, a guide claw 10 projecting downward from the pillar portion 7 at the left end of FIG. 10 and a guide claw 10 projecting downward from the central pillar portion 7 of FIG. 10 , Guide 4 when it is housed in one pocket Pt.

Further, engaging portions 11 and engaged portions 12 that engage with each other in the radial direction are provided on the adjacent pillar portions 7 and 7 of the cage segments 6B and 6B adjacent in the circumferential direction. The stepped portion provided on the inner side surface or the outer side surface of the engaging portion 11 and the stepped portion provided on the outer side surface or the inner side surface of the engaged portion 12 engage with each other in the radial direction. Each cage segment 6B is molded with the same mold. When the roller cage segment in which the rollers 4 are housed in each pocket Pt is incorporated into the inner ring, the rollers 4 of the roller cage segment are sequentially arranged along the raceway surface of the inner ring, and finally, as shown in FIG. The two roller cage segments 6B and 6B are arranged obliquely, and the engaging portion 11 and the engaged portion 12 that engage with each other are engaged while moving from the outer diameter side to the inner diameter side.
At this time, the segment cage for roller bearings also has the same effect as that of the first embodiment.

The cage segment of each embodiment is molded by a mold, but can also be molded by machining or a 3D printer.
Further, the cage segment may be made of metal other than synthetic resin. In this case, the cage segment may be formed by casting and machining, or machining.

<Example of application to wind power generation equipment>
FIG. 12 shows an example of a wind power generation device using a roller bearing according to any one of the above embodiments. In this wind power generation device, the spindle 24 of the propeller-shaped wind turbine 23 is rotatably supported by the spindle bearing 25 on the nacelle 22 installed horizontally at the upper end of the column 21. The spindle 24 is connected to the generator 26 via a speed increaser 27.
The roller bearing according to any one of the above embodiments is used for the spindle bearing 25 in this wind power generation device. The roller bearing according to the embodiment can be used for the large spindle bearing 25 used in such a wind power generation device, which contributes to cost reduction of the entire wind power generation device.

<Example of application to turntable equipment>
FIG. 13 shows a turntable device using a roller bearing according to any one of the above embodiments. A turntable 33 is rotatably supported by a fixed spindle 32 protruding from the upper surface of the base 31 via a single row tapered roller bearing 30. The single row tapered roller bearing 30 is, for example, the roller bearing described with reference to FIG. 1, and holds the inner ring 2, the outer ring 3, the plurality of rollers 4 interposed between the inner ring 2 and the outer ring 3, and the plurality of rollers 4. The cage 5 is provided. The cage 5 is a cage 5 composed of any of the cage segments 6 described with reference to FIGS. 1 to 11.

The turntable 33 has a cylindrical portion 34 located concentrically on the outer circumference of the main shaft 32. The inner peripheral surface of the cylindrical portion 34 has a downward stepped surface portion 34a, and the upper side of the stepped surface portion 34a is formed in a small diameter portion. The outer peripheral surface of the main shaft 32 has an upward stepped portion 32a, and a portion below the stepped portion 32a has a large diameter portion. The single row tapered roller bearing 30 is installed so that the large collar 2c of the inner ring 2 is located on the lower side, and the end surface of the inner ring on the large collar 1a side engages with the stepped surface 32a of the main shaft 32, and the inner ring. The end surface of the outer ring 2 opposite to the end surface of the turntable 33 is engaged with the stepped surface portion 34a of the cylindrical portion 34 of the turntable 33.

This turntable device is used for distribution machines, work machines, industrial machines and the like. Turntable devices are becoming larger and have higher load capacities. In the tapered roller bearing 30 that supports such a large-sized and high-load capacity turntable device, the cage according to any one of the embodiments is compact and has a roller-guided type, and can cope with an increase in the size of the bearing. It can be done and the cost can be reduced. Since the turntable 33 is supported, only one single row tapered roller bearing 30 can be used for the spindle 32 depending on the usage conditions. Further, in the single row tapered roller bearing 30, the roller 4 and the cage 5 can be easily arranged on the raceway surface of the inner ring 2 by installing the large collar 2c side on the lower side. A plurality of single row tapered roller bearings 30, for example, two may be provided side by side on the outer circumference of the spindle 32.

Although each of the above embodiments has been described when applied to a single row roller bearing, the roller bearing and its cage segment of the present invention may be applied to a double row roller bearing. When applied to double row roller bearings, a cage consisting of a plurality of cage segments is provided for each row.

Although the embodiments for carrying out the present invention have been described above based on the embodiments, the embodiments disclosed this time are exemplary in all respects and are not limiting. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 ... Roller bearing, 2 ... Inner ring, 3 ... Outer ring, 4 ... Roller, 5 ... Roller bearing segment cage, 6,6A, 6B ... Cage segment, 7 ... Pillar part, 9 ... Connecting part, Pt ... Pocket, 10 ... Guide claw, 10a ... Guide surface, 11 ... Engagement part, 12 ... Engagement part

Claims (7)

A roller guide type roller bearing segment cage consisting of a plurality of cage segments arranged in an annular shape.
Each of the cage segments includes a plurality of pillars extending in the axial direction and a pair of connecting portions extending in the circumferential direction to connect the plurality of pillars, respectively, and the plurality of pillars and the pair of connecting portions. A pocket for holding the roller is formed between the adjacent pillars, and each pillar has a guide surface for guiding the outer peripheral surface of the roller housed in the pocket. A guide claw that protrudes from the outer diameter side or the inner diameter side is provided.
For an array of the plurality of cage segments arranged in an annular shape, a pair of guide claws protruding toward the outer diameter side and a pair of guide claws protruding toward the inner diameter side are provided for each pocket along the circumferential direction. A segment cage for roller bearings, which is provided with engaging portions and engaged portions that are alternately arranged in the radial direction and are engaged with each other in the radial direction on the pillar portions adjacent to the cage segments adjacent to each other in the circumferential direction. In the roller bearing segment cage according to claim 1, the direction in which the engaging portion engages with the engaged portion is the protruding direction of the guide claw in the pillar portion provided with the engaging portion. Segment cage for roller bearings in the same direction. In the roller bearing segment cage according to claim 1 or 2, the engaging portion is a convex portion protruding in the circumferential direction at the circumferential end portion of the pillar portion, and the engaged portion is A segment cage for roller bearings, which is a concave portion in which the convex portion engages at the circumferential end of the pillar portion adjacent to the pillar portion. In the roller bearing segment cage according to claim 1 or 2, the engaging portion is a tapered portion that is radially outwardly inclined toward the tip at the circumferential end portion of the pillar portion. The engaged portion is a peripheral end portion of a pillar portion adjacent to the pillar portion, and is a segment for roller bearings which is a tapered portion that inclines inward in the radial direction toward the tip so that the tapered portion engages. Cage. In the roller bearing segment cage according to claim 3 or 4, a pocket clearance is provided between the roller and the pocket, and each cage segment is offset to the outer diameter side by the pocket clearance. A roller bearing segment cage in which the final clearance x between the tip of the engaged portion and the base end of the engaged portion is smaller than the circumferential length a of the engaged portion. In the roller bearing segment cage according to any one of claims 1 to 5, the pair of connecting portions is a roller bearing segment cage having an arc shape or a straight shape. The segment cage for roller bearings according to any one of claims 1 to 6, further comprising an inner ring, an outer ring, a plurality of rollers interposed between the inner ring and the outer ring, and the plurality of rollers. Roller bearing.

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