JP2015117767A - Roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller bearing having superior workability in an assembling work, not impairing bearing performance, having a simple structure and easy in processing.SOLUTION: In a roller bearing 1 having an outer ring 10, an inner ring 20 and a plurality of rollers 30, the rollers 30 are respectively provided with a rolling surface 31 on an outer periphery, and a pair of roller end faces 32 at both end portions, and the outer ring 10 is provided with an outer ring raceway 11 in which the rollers 30 rolls and a pair of flange faces 13 projecting from both side end portions in the axial direction, of an outer ring raceway 11. When the roller 30 is kept into contact with one flange face 13 at one roller end face 32, and falls in the direction opposite to the outer ring raceway 11, from a state that the rolling face 31 is kept into contact with the outer ring raceway 11, one roller end face 32 is kept into contact with one flange face 13, and a guide clearance gap Δ is formed between the other roller end face 32 and the other flange face 13, the other roller end face 32 is extended to the direction opposite to the outer ring raceway 11 over a contact position P3 to be kept into contact with the other flange face 13, and the roller 30 is restricted by the outer ring 10.

Description

  The present invention relates to a roller bearing.

  In a large-sized rolling bearing such as a wind power generation bearing, for the convenience of forming and assembling the cage, a segmented split cage in which a plurality of segments are connected is used.

  The segment-type split cage is a combination of a plurality of segments that hold rolling elements in an annular shape between an inner ring and an outer ring, and a general segment is engaged with both the inner ring and the outer ring. Absent. Further, in the roller bearing in which the rolling element is a roller, a flange for roller guidance is formed on the inner ring or the outer ring, but the flange is formed at the minimum height necessary for guiding the roller. The restraining of the roller when the roller falls is not taken into consideration.

  In the case of a roller bearing using a normal integrated cage, the cage and rolling elements constitute an assembly that is integral with the inner ring or outer ring. In the assembling step, the rolling element and the cage do not fall off from the inner ring or the outer ring.

  However, when a segmented split cage is used, the segments are not constrained in the circumferential direction, so the rolling elements and the segments constituting the cage are scattered in the roller bearing assembly process. If it falls off from the inner ring or outer ring, the assembly work may be hindered. In particular, since the segment-type split cage is employed for large bearings, it is very important to improve the workability of the assembly process.

  Therefore, a rolling bearing provided with a claw for engagement in each segment, engaging the claw with the inner ring or the outer ring, and preventing the segments and the rolling elements held by the segment from dropping from the inner ring or the outer ring. There is. (See Patent Document 1).

JP 2011-169392 A

  However, the split type cage and the rolling bearing disclosed in Patent Document 1 need to be provided with engagement means such as an engagement groove in the inner ring or the outer ring in order to engage the claw with the inner ring or the outer ring. There is. If the engagement groove is provided in the inner ring or the outer ring, there is a concern that the strength of the race ring may be reduced, such as the strength of the hook. In addition, in order to secure the strength of the bearing ring such as the strength of the hook, it is necessary to reduce the width of the raceway, and there is a problem that the performance as a rolling bearing such as the life is sacrificed.

  The present invention has been made to solve the above-described problems, and provides a roller bearing that has good workability in the assembly process, does not impair the bearing performance, has a simple structure, and is easy to process. It is aimed.

  In order to solve the above-mentioned problem, the structural feature of the invention according to claim 1 is that two race rings and a plurality of rollers arranged so as to roll between the two race rings are provided. The roller has a rolling surface on the outer periphery and a pair of roller end surfaces on both ends, a raceway surface on which the roller rolls on one of the two race rings, and an axial direction of the raceway surface A roller bearing formed with a pair of flange surfaces projecting from both end portions, wherein the roller is in contact with the raceway surface and the roller end surface on one side is on the flange surface on one side. In contact with the roller end surface on the other side and the flange surface on the other side with a guide gap, the roller contacts the roller end surface on one side with the flange surface on one side. When the roller rolls over in the direction opposite to the raceway surface, the roller end surface on the other side exceeds the contact position in contact with the flange surface on the other side. By the flange surface of the other side extends in the direction opposite to the raceway surface, the roller is to be bound to the one of the raceway rings.

  In the assembling process, the roller bearing is arranged such that one of the bearing rings is horizontally disposed on a side surface, and the roller is arranged so that one end of the roller end surface is disposed radially outward of the raceway surface, and the one side flange surface is disposed. The roller may be inserted until the rolling surface of the roller contacts the raceway surface. At this time, if the center of gravity of the roller is located away from the raceway surface in the radial direction of the flange surface on one side, the other end of the roller is in the direction opposite to the raceway surface in the radial direction. Falls.

  According to the configuration of the present invention, because the roller end surface on the other side of the roller is in contact with the flange surface on the other side of the bearing ring at the contact position, the roller is restrained by the bearing ring. The roller can be prevented from falling off from the race. For this reason, the workability | operativity of the said assembly process of the said roller bearing improves significantly compared with the conventional roller bearing. The means for achieving the configuration of the present invention is to form the outer periphery of the flange surface on the other side in consideration of the guide gap between the roller end surface on the other side and the flange surface on the other side. The bearing performance is not impaired, the structure is simple, and the processing is easy.

  In order to solve the above-described problem, the structural feature of the invention according to claim 2 is that the roller bearing has a cross-section including the axis of the one bearing ring and the axis of the roller, and the flange surface on the one side. A distance from a position farthest from the raceway surface to a position farthest from the raceway surface of the other side flange surface from a position farthest from the raceway surface of the one side collar surface, The roller end surface of the other side is formed shorter than the distance to the position closest to the raceway surface, and when the roller falls as described above, the roller end surface on the other side contacts the flange surface on the other side. It is.

  According to the configuration of the present invention, when the roller bearing is designed, by setting the guide gap, the both side surfaces, and the specifications of the roller in advance, when the roller falls down as described above, The roller end surface of the roller reliably contacts the other flange surface, and the roller can be prevented from falling off from the race.

  In order to solve the above-mentioned problem, a structural feature of the invention according to claim 3 is that the roller bearing is a tapered roller bearing.

In the conventional tapered roller bearing, the flange surface on the other side, that is, the small flange surface, is formed to have a minimum radial width that can prevent the roller from slipping out in the axial direction. Cannot be prevented.
According to the configuration of the present invention, when the roller is about to fall down, the roller end surface of the other side, that is, the roller small end surface is in contact with the small collar surface and is restrained by the raceway ring. It is possible to prevent the roller from falling off the raceway in the process.

  In order to solve the above-mentioned problem, the structural feature of the invention according to claim 4 is that the roller bearing has a segmented split type cage made up of a plurality of segments, To be held in the segment.

In the assembling step, the roller and the segment are arranged as an aggregate in such a manner that one end surface of the roller is in contact with a flange surface on one side of the race. The center of gravity of the aggregate is likely to deviate in the direction opposite to the track surface in the radial direction of the flange surface on one side, as compared to the case of the roller alone. Further, the mass of the aggregate is larger than that of the roller alone, and in the arrangement described above, the roller held in the segment is more likely to fall than in the case of the roller alone.
According to the configuration of the present invention, when the roller is about to fall down, the effect of preventing the roller from falling off from the raceway due to the roller being restrained by the raceway is the case only for the roller. Bigger than that.

  ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity in an assembly process is good, a bearing performance is not impaired, a structure is simple, and a roller bearing which is easy to process can be provided.

It is sectional drawing of the roller bearing of the 1st Embodiment of this invention. FIG. 5 is an explanatory diagram for explaining the operation of the roller bearing according to the first embodiment of the present invention. It is sectional drawing of the tapered roller bearing of the 2nd Embodiment of this invention. It is explanatory drawing explaining the effect | action of the tapered roller bearing of the 2nd Embodiment of this invention. It is a perspective view of the segment of the tapered roller bearing of the 2nd Embodiment of this invention.

(First embodiment)
A roller bearing according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a roller bearing according to a first embodiment of the present invention.
In FIG. 1, a roller bearing 1 is a cylindrical roller bearing that includes an outer ring 10 that is one race ring, an inner ring 20 that is the other race ring, and a plurality of cylindrical rollers 30.

  The outer ring 10 is made of a steel material such as bearing steel and is formed in an annular shape. The outer ring 10 is formed with a cylindrical outer ring raceway 11 on the inner periphery, which is a raceway surface on which the rollers 30 roll. Both end portions of the outer ring 10 are outer ring end faces 12 which are planes perpendicular to the axis. A pair of flange surfaces 13 projecting with a reduced diameter are formed at both ends in the axial direction of the outer ring raceway 11 of the outer ring 10. Both side surfaces 13 are planes perpendicular to the axis, and the radially inner peripheral ends of both side surfaces 13 are connected to the inner peripheral surface 15 of the cylindrical surface via a chamfer chamfer 14.

The inner ring 20 is made of a steel material such as bearing steel and is formed in an annular shape. The inner ring 20 has a cylindrical inner ring raceway 21 that is a raceway surface on which the rollers 30 roll.
The plurality of rollers 30 are made of a steel material such as bearing steel or ceramic, and are formed in a cylindrical shape. A cylindrical rolling surface 31 is provided on the outer periphery, and a pair of roller end surfaces 32 are formed flat on both ends. Between both end portions of the rolling surface 31 and both roller end surfaces 32 are connected by roller chamfers 33, respectively.

In FIG. 1, a plurality of rollers 30 have a roller end surface 32 on one side in contact with a flange surface 13 on one side of the outer ring 10, and a rolling surface 31, an outer ring track 11 of the outer ring 10, and an inner ring track 21 of the inner ring 20. It is arranged so as to be able to roll freely in contact with. Further, a guide gap Δ is provided between the roller end surface 32 on the other side and the flange surface 13 on the other side.
Further, the distance from the position P0 farthest from the outer ring raceway 11 on the one side collar 13 to the position P1 farthest from the outer ring raceway 11 on the other side collar 13 is from the position P0 to the other side of the roller 30. The roller end surface 32 is formed shorter than the distance to the position P2 closest to the outer ring raceway 11.

  FIG. 2 is an explanatory view for explaining the operation of the roller bearing 1 according to the first embodiment of the present invention, and the state of the outer ring 10 and the roller 30 in the assembly process includes the axis of the outer ring 10 and the axis of the roller 30. Shown in cross section.

  In the assembly process, the outer ring 10 is disposed on the assembly base 50 with the outer ring end surface 12 horizontally, the rolling surface 31 of the roller 30 is in contact with the outer ring raceway 11 of the outer ring 10, and the one side roller end surface 32 is on one side of the outer ring 10. It is disposed in contact with the flange surface 13. However, since the center of gravity G of the roller 30 in FIG. 2 is located away from the raceway surface of the flange surface 13 on one side of the inner ring 20, the roller 30 has the roller P on the other side with the position P0 as a fulcrum. The other end including the end face 32 falls over in the direction opposite to the outer ring raceway 11, that is, inward in the radial direction.

  At this time, since the distance from the position P0 to the position P1 is shorter than the distance from the position P0 to the position P2, the roller end surface 32 on the other side is located from the position P0 on the flange surface 13 on the other side. At the contact position P3 that is equal to the distance from the position P0 to the position P2, the other side of the collar surface 13 is contacted. Further, the distance from the position P0 to the position P1 is shorter than the distance from the position P0 to the contact position P3, and the flange 13 extends beyond the contact position P3 in the opposite direction to the outer ring raceway 11. As a result, the roller 30 is reliably restrained by the outer ring 10, and the roller 30 can be prevented from falling off from the outer ring 10 in the assembly process of the roller bearing 1, and the workability is greatly improved compared to a conventional roller bearing having a similar configuration. improves.

Moreover, the roller bearing 1 can restrain the roller 30 by setting the dimensions of the guide gap Δ and the flange surface 13 to predetermined dimensions. For this reason, there is no decrease in bearing performance such as a decrease in roller length and a decrease in heel strength due to an increase in special means. In addition, the structure is simple and processing is easy.
Thus, the roller bearing 1 according to the first embodiment of the present invention provides a roller bearing that has good workability in the assembly process, does not impair the bearing performance, has a simple structure, and is easy to process. it can.

(Second Embodiment)
A tapered roller bearing according to a second embodiment of the present invention will be described with reference to the drawings.
FIG. 3 is a cross-sectional view of the tapered roller bearing 2 of the second embodiment of the present invention, and FIG. 4 is an explanatory view for explaining the operation of the tapered roller bearing 2 of the second embodiment. FIG. 5 is a perspective view of the segment 241 of the segmented split cage 240 of the tapered roller bearing 2 according to the second embodiment.

The tapered roller bearing 2 of the second embodiment is different from the roller bearing 1 of the first embodiment in that the shape of the roller 230, the shape of the outer ring raceway 211 of the outer ring 210, the shape of the inner ring raceway 221 of the inner ring 220, and the flange surfaces 224, 2251 are the same. Different.
In the tapered roller bearing 2 of the second embodiment, the description of the shape, configuration, and effects common to the roller bearing 1 of the first embodiment is omitted, and is different from the roller bearing 1 of the first embodiment. Only the configuration and operational effects will be described.

  In FIG. 3, the tapered roller bearing 2 includes an inner ring 220 that is one race ring, an outer ring 210 that is the other race ring, a plurality of tapered tapered rollers 230, and a segment-type split cage 240. It is a tapered roller bearing constructed.

  The inner ring 220 is made of a steel material such as bearing steel and is formed in an annular shape. The inner ring 220 has a conical inner ring raceway 221 formed on the outer periphery. An end of the inner ring 220 in the large diameter direction of the inner ring raceway 221 is an inner ring large end surface 222, and an end of the inner ring 220 in the small diameter direction of the inner ring raceway 221 is an inner ring small end surface 223. From the end on the large diameter side of the inner ring raceway 221 of the inner ring 220, the large flange surface 224 as the flange surface on one side that expands the diameter, and from the end on the small diameter side of the inner ring raceway 221, A small surface 225 is formed as a surface.

  The large collar surface 224 is a conical inner surface, and the radial outer peripheral end of the large collar surface 224 is connected to a cylindrical large collar outer peripheral surface 227 via a large collar chamfer 226. The gavel surface 225 is a conical surface, and the end part of the outer periphery in the radial direction of the gavel surface 225 is continuous with the gavel outer peripheral surface 229 of the cylindrical surface through the bevel chamfering 228.

The outer ring 210 is made of a steel material such as bearing steel and is formed in an annular shape. The outer ring 210 has a conical outer ring raceway 211 formed on the inner periphery.
The plurality of tapered rollers 230 are made of a steel material such as bearing steel or ceramic, and are formed in a tapered shape. Roller surface 231 having a conical surface on the outer periphery, roller large end surface 232 as one roller end surface formed in a spherical surface on the large diameter side end portion, and roller small as the other roller end surface formed in a flat surface on the small diameter side end portion An end face 233 is provided.

  The segmented split type retainer 240 is composed of a plurality of segments 241. FIG. 5 is a perspective view of the segment 241. Each segment 241 has two circumferential ribs 243 and 244 and axial ribs 245 and 246, and the roller 230 is accommodated by the two circumferential ribs 243 and 244 and the axial ribs 245 and 246. A pocket 242 is configured. Protrusions 247 and 248 that prevent the rollers 230 from coming off are formed on the side surfaces of the two circumferential ribs 243 and 244 on the pocket 242 side, respectively.

  In FIG. 3, the plurality of tapered rollers 230 housed in the plurality of segments 241 are disposed so that the roller large end surface 232 is in contact with the large collar surface 224 of the inner ring 220 and the rolling surface 231 is in contact with the inner ring raceway 221 of the inner ring 220. A guide gap Δ2 is provided between the roller small end surface 233 and the small collar surface 225 of the inner ring 220. Further, since the roller large end surface 232 is formed into a spherical surface and the large collar surface 224 of the inner ring 220 is formed into a conical surface, the contact between the roller large end surface 232 and the large collar surface 224 at the roller contact position P20 is a point or a circumference. It is the upper line. The distance from the roller contact position P20 to the position P21 farthest from the inner ring raceway 221 of the small collar surface 225 is from the roller contact position P20 to the position P22 closest to the inner ring raceway 221 of the roller small end surface 233 of the tapered roller 230. It is shorter than the distance.

  FIG. 4 is an explanatory diagram for explaining the operation of the tapered roller bearing 2 according to the second embodiment of the present invention, and shows the state of the inner ring 220 and the roller 230 in the assembly process, the axis of the inner ring 220, and the axis of the tapered roller 230. The cross section includes

  In the process of assembling the tapered roller bearing 2, the inner ring 220 is disposed on the assembly base 250 with the inner ring end face 222 horizontally, and the tapered roller 230 accommodated in each segment 241 has the rolling surface 231 on the inner ring raceway 221 of the inner ring 220. The roller large end surface 232 is disposed in contact with the large collar surface 224 of the inner ring 220. However, since the center of gravity G2 of the aggregate of the tapered roller 230 and the segment 241 in FIG. 4 is located radially inward of the large collar surface 224 of the inner ring 220, the tapered roller 230 has a roller contact position P20. As a fulcrum, it falls in the opposite direction to the inner ring raceway 221, that is, radially outward.

  At this time, since the distance from the roller contact position P20 to the position P21 is formed shorter than the distance from the roller contact position P20 to the position P22, the roller small end surface 233 extends from the roller contact position P20 to the position P22. At the contact position P23 equal to the distance of Further, the distance from the roller contact position P20 to the position P21 is shorter than the distance from the roller contact position P20 to the contact position P23, and the small flange surface 225 extends beyond the contact position P23 in the direction opposite to the inner ring raceway 221. Exists. As a result, the roller 230 is reliably restrained by the inner ring 220. As a result, in the assembly process of the tapered roller bearing 2, the tapered roller 230 can be prevented from falling off from the inner ring 220, and the workability is greatly improved compared to a conventional tapered roller bearing having a similar configuration.

  The roller bearing of the first embodiment described above is a cylindrical roller bearing that does not have a segmented split cage, but in other embodiments, it may be a cylindrical roller bearing that has a segmented split cage. .

  The roller bearing of the first embodiment described above is a cylindrical roller bearing, and the second embodiment is a tapered roller bearing. In other embodiments, other roller bearings such as spherical roller bearings using spherical rollers are used. It may be a type of roller bearing.

  In the roller bearing of the above-described embodiment, the plurality of rollers are arranged in a single row, but in other embodiments, the plurality of rollers may be arranged in multiple rows such as a double row.

  The present invention is not limited to such embodiments, and can naturally be implemented in various modes without departing from the gist of the present invention.

1. Roller bearing 2. Tapered roller bearing (roller bearing)
10, 210 ... Outer ring (Raceway ring)
11, 211 ... Outer ring raceway (track surface)
13 ... Minoh 20, 220 ... Inner ring (Raceway)
21, 221 ... Inner ring track (track surface)
224...
225 ... Small surface (Mineral)
30, 230 ... Rollers 31, 231 ... Rolling surface 32 ... Roller end face 232 ... Roller large end face (roller end face)
233 ... Roller small end face (roller end face)
240 ... Segment type split cage 241 ... Segment Δ, Δ2 ... Guide gap P3, P23 ... Contact position

Claims (4)

Two race rings, and a plurality of rollers arranged to be freely rollable between the two race rings. The rollers have a rolling surface on the outer periphery and a pair of roller end surfaces on both side ends. A roller bearing formed on one of the two race rings, wherein a raceway surface on which the roller rolls and a pair of flange surfaces projecting from both end portions in the axial direction of the raceway surface,
The roller has the rolling surface in contact with the raceway surface, the roller end surface on one side is in contact with the flange surface on one side, and a guide gap is formed between the roller end surface on the other side and the flange surface on the other side. From the state that has
When the roller contacts the roller end surface on one side with the flange surface on one side and falls in the direction opposite to the raceway surface, the roller end surface on the other side contacts with the flange surface on the other side. Beyond,
The roller bearing is characterized in that the roller is constrained by the one raceway when the flange surface on the other side extends in a direction opposite to the raceway surface. In the cross section including the axis of the one bearing ring and the axis of the roller,
The distance from the position farthest away from the raceway surface of the one side saddle surface to the position farthest away from the raceway surface of the other side saddle surface,
It is formed shorter than the distance from the position farthest from the raceway surface of the one side flange surface to the position closest to the raceway surface of the roller end surface on the other side of the roller, and the roller has fallen as described above. 2. The roller bearing according to claim 1, wherein the roller end surface on the other side is in contact with the flange surface on the other side.   The roller bearing according to claim 1, wherein the roller bearing is a tapered roller bearing.   4. The roller bearing according to claim 1, wherein the roller bearing includes a segmented split type cage that includes a plurality of segments, and each of the plurality of rollers is held by the segment. 5. The roller bearing described in the item.

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