JP2008064134A - Cage for cylindrical roller bearing, and cylindrical roller bearing using the cage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cage for a cylindrical roller bearing capable of enhancing the working efficiency and preventing damages of bearing components when disassembling the cylindrical roller bearing. <P>SOLUTION: In the cage for the cylindrical roller bearing, a plurality of pockets 7 for holding a plurality of cylindrical rollers 4 in the circumferential direction are provided, inner faces 8 which are opposite to each other in the circumferential direction of the pockets and in contact with rolling contact surfaces 4a of the cylindrical rollers have an area E1 and an area E2 in which the spacing between the inner faces is not reduced and reduced, respectively, on an inside diameter 5b side of a cage 5. When a single-flanged inner ring 3 is drawn out in a bearing disassembly step, circumscribing radial parts of the cylindrical rollers are dropped inside the pockets from a flange part inside diameter surface 2b on outer rings 2 of both flanges. Inclined face parts 11a are provided opposite to each other in the width direction across the circumferential direction of the pockets, and provided close to the inside diameter of the cage of the inner surface 10 with an end face 4b of the cylindrical roller being brought into contact therewith, and in the step of detaching the cylindrical rollers and the cage from the outer and inner rings, the cylindrical rollers are inclined close to the inside diameter of the cage of the inner face, and dropped in the inclined face parts and the roller end faces are held thereby. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement in a cage for a cylindrical roller bearing used in an axle for a railway vehicle, a main motor, a steel rolling mill, a continuous casting machine or the like.

  For example, in the case of a cylindrical roller bearing used when an axle of a railway vehicle is supported, as shown in FIG. 8, a pair of race rings, for example, an outer ring 2 with both collars, an inner ring 3 with one collar, and the outer ring 2 An annular cage 5 having a plurality of pockets 7 in the circumferential direction with a predetermined interval between the inner ring 3 and a plurality of cylindrical rollers incorporated in the pocket 7 and held rotatably. 4 is configured.

  In particular, for axles of railway vehicles, periodic inspections are required after disassembling the bearings every hundreds of thousands of kilometers, and periodic inspections are performed relatively frequently. At the time of periodic inspection, etc., after removing from the axle, the parts such as the outer ring 2, the inner ring 3, the cage 5 and the cylindrical roller 4 are disassembled for inspection.

In order to disassemble the cylindrical roller bearing 1 of this type, after pulling out the inner ring 3 with one collar and then pulling out the outer ring 2 with both collars, when the outer ring 2 is pulled out, the collar portion 2a of the outer ring 2 is a cylindrical roller. 4 end surface 4b or roller chamfered portion 4c, the cylindrical roller 4 needs to be moved in the direction of the inner diameter 5b of the cage 5 once.
Therefore, conventionally, in this type of cylindrical roller bearing 1, as shown in FIGS. 8 to 10, for example, as shown in FIGS. Region E1, in which the inner surface 8 in contact with the rolling surface 4a, that is, the opposing surface of the column portion 6 facing each other in the circumferential direction, is not narrowed as the distance between the inner surfaces 8, 8 increases toward the inner diameter 5b side of the cage 5. E1 and narrowed regions E2 and E2, and when the inner ring 3 of one collar is pulled out in the bearing disassembling process, the circumscribed circular diameter part of the cylindrical roller 4 is larger than the inner diameter surface 2b of the collar part of the outer ring 2 of both collars. A cage 5 (this type of cage is also referred to as a drop-type cage hereinafter) that falls into the pocket is employed (see, for example, Patent Documents 1 and 2). By adopting such a configuration, the cylindrical roller 4 can be temporarily moved in the direction of the inner diameter 5b of the cage 5 during the outer ring pulling operation described above, so that it does not interfere with the outer ring collar portion inner diameter 2b.

The disassembly process of this type of cylindrical roller bearing will be described with reference to FIG.
(1) First, as shown in FIG. 11A, the cylindrical roller bearing 1 to be disassembled is installed on a work table. At this time, the rotating shaft G of the bearing is installed so as to be orthogonal to the work table (vertically) (sideways state). At this time, the inner ring 3 is installed with the end face side with the collar 3a facing upward.
(2) First, as shown in FIG. 11 (b), the inner ring 3 is extracted upward (in the direction indicated by the arrow U in FIG. 11), and the outer ring 2, the cage 5, and the cylindrical roller 4 are configured.
(3) When the inner ring 3 is extracted upward in this manner, as shown in FIG. 11C, the cylindrical roller 4 is moved closer to the cage inner diameter 5b of the pocket inner side surface 8 in contact with the roller rolling surface 4a. Can do.
As a result, the cylindrical roller 4 does not protrude from the outer ring collar inner diameter 2b on the outer diameter 5a side of the cage 5.
(4) Then, in this state, the outer ring 2 is extracted upward, and the cage 5 and the cylindrical roller 4 are configured.
(5) Finally, the cylindrical roller 4 is moved in the outer diameter direction and pulled out. This completes the disassembly of the bearing.

However, according to the techniques disclosed in Patent Literature 1 and Patent Literature 2, after the inner ring 3 is extracted, the cylindrical roller 4 can be once dropped into the radially inner side (inner cage inner diameter 5b direction). However, the present inventor has found a further problem.
That is, in this type of prior art, the cylindrical roller 4 is merely displaced straight in the radial direction of the cage 5, so that the cylindrical roller 4 has a certain diameter (for example, a factor such as vibration) when the outer ring 2 is pulled out. It is conceivable to move outward (in the direction of the cage outer diameter 5a) (FIG. 11 (d)).
If the cylindrical roller 4 moves in the direction of the cage outer diameter 5a during the extraction operation of the outer ring 2 as described above, it may come into contact with the collar portion 2a of the outer ring 2 and the outer ring 2 cannot be extracted or is difficult to extract. Yes, workability in the disassembling work is deteriorated.
Furthermore, if the collar portion 2a of the outer ring 2 and the cylindrical roller 4 come into contact with each other, the end surface 4b of the cylindrical roller 4, the roller chamfered portion 4c, the collar portion 2a of the outer ring 2 and the like may be damaged.
Further, depending on the length of the pocket 7 and the length of the cylindrical roller 4, the cylindrical roller 4 is likely to drop out of the pocket 7 after the outer ring is removed (FIG. 11 (e)). 4 may be damaged.
FIG. 12 shows a conventional cylindrical roller bearing 1 in which the inner ring 3 has no collar. Even the cylindrical roller bearing 1 of the type shown in FIG. 12 has the above-described problems.
JP-A-2005-351367 Japanese Patent Laid-Open No. 7-12131

  The present invention has been made in order to solve such a problem, and an object of the present invention is to improve work efficiency and prevent damage to bearing components when disassembling a cylindrical roller bearing. An object of the present invention is to provide a cage for a cylindrical roller bearing.

  In order to achieve such an object, the first invention of the present invention is incorporated in a cylindrical roller bearing in which any one of the race rings is a double collar and the other race ring is a single collar or no collar. It has a plurality of pockets that hold the cylindrical rollers in the circumferential direction, and the pockets are opposed to each other in the circumferential direction, and the inner side surface that contacts the rolling surface of the cylindrical rollers is the inner diameter side or outer diameter side of the cage When the bearing ring with one flange or no collar is pulled out in the bearing disassembly process, the circumscribed diameter of the cylindrical roller is A retainer for a cylindrical roller bearing that falls into the pocket inward or outward from the inner diameter surface or outer diameter surface of the collar portion of the raceway ring, facing the width direction intersecting the circumferential direction of the pocket, and the end surface of the cylindrical roller Of the inner surface that touches The roller is provided near the outer diameter or inner diameter of the cage, and in the step of removing the cylindrical roller and the cage from the pair of race rings, the cylindrical roller falls down toward the inner diameter of the inner surface or closer to the outer diameter. This is a cylindrical roller bearing retainer provided with a cylindrical roller inclined holding mechanism for holding the end face.

  According to a second invention, in the first invention, the cylindrical roller inclined holding mechanism is a cage for a cylindrical roller bearing, characterized in that the cylindrical roller inclined holding mechanism is configured by an inclined surface portion inclined in the end surface direction of the cage. It is.

  In a third aspect of the invention for a cylindrical roller bearing according to the first aspect of the invention, the cylindrical roller inclined holding mechanism is configured by a concave surface portion that is recessed in a direction parallel to the central axis of the cage. This is a cage.

  According to a fourth aspect of the present invention, in the second or third aspect of the invention, the cylindrical roller tilt holding mechanism is formed near the inner diameter or outer diameter of the cage on the inner side surface with which the end face of the cylindrical roller contacts. This is a cage for roller bearings.

  A fifth invention is the cage for a cylindrical roller bearing according to the second invention, wherein the inclined angle of the inclined surface portion is 20 minutes or more.

  The sixth invention is a cylindrical roller bearing characterized by using the cage of any one of the first to fifth inventions.

  7th invention is incorporating the cylindrical roller bearing of 6th invention for the axle support of a railway vehicle.

  According to the present invention, it is possible to provide a retainer for a cylindrical roller bearing capable of improving working efficiency and preventing damage to bearing components when disassembling the cylindrical roller bearing. Thereby, an overhaul operation can be performed without deteriorating the bearing performance.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
Note that the present embodiment is merely an embodiment of the present invention, and is not construed as being limited thereto. The design can be changed within the scope of the present invention. In this embodiment, a cylindrical roller bearing for supporting an axle of a railway vehicle will be described as an example. However, a cylindrical roller bearing used for a main motor, a steel rolling mill, a continuous casting machine, etc. for a railway vehicle may be used.

Further, in Examples 1 and 3, the outer ring has both collars, and the inner ring is described as a single collar type (NJ type) cylindrical roller bearing. In Example 2, the outer ring has both collars, and the inner ring has collars. However, the present invention is not construed as being limited thereto, and other types can be adopted. Specifically, a cylindrical roller bearing with a double collar on the inner ring and a single collar on the outer ring (NF type), or a cylindrical roller bearing with a collar on the inner ring without a collar on the outer ring (N type) Is targeted.
Further, in this embodiment, the description will be made with a single row cylindrical roller bearing, but even a double row cylindrical roller bearing is within the scope of the present invention.
In the present embodiment, the sealing plate configuration is not shown, but a sealing plate having a predetermined configuration can be appropriately employed according to the specification.
"Example 1"

  1 to 3 show a first embodiment of the present invention, FIG. 1 is a schematic longitudinal sectional view showing a cylindrical roller bearing in a radial direction, and FIG. 2 is a main part of the cylindrical roller bearing of the first embodiment. FIG. 3 is a cross-sectional view of the assembly of the cage and the cylindrical roller, and FIG. 3 is a cross-sectional view taken along the line II-II in FIG.

  As shown in FIG. 1, the cylindrical roller bearing 1 includes a pair of raceways (in this embodiment, an outer ring 2 and an inner ring 3) that can rotate relative to each other, and a plurality of cylindrical roller bearings 1 that are rotatably incorporated between the outer ring 2 and the inner ring 3. It is comprised by the cylindrical roller 4 as an individual rolling element, and the holder | retainer 5 which hold | maintains this cylindrical roller 4 rotatably at equal intervals. In this embodiment, a cylindrical roller bearing of the type (NJ type) in which the outer ring 2 has both collars 2a and 2a and the inner ring 3 has one collar 3a is employed. Since the outer ring 2, the inner ring 3 and the cylindrical roller 4 are the same as the conventional configuration, detailed description thereof is omitted, but the present embodiment is not limited to any interpretation.

  The cage 5 has a plurality of pockets 7 for holding a plurality of cylindrical rollers 4 in the circumferential direction (in the direction indicated by the arrow R in FIG. 3) at equal intervals and rotatably, respectively. It is configured in an annular shape with equal intervals in the direction indicated by R).

  According to this embodiment, as shown in FIG. 3, the pockets 7 face each other in the circumferential direction (the direction indicated by the arrow R in FIG. 3) and contact the inner side surfaces 8, 8 in contact with the rolling surface 4 a of the cylindrical roller 4. (Refer to the cross-sectional view of the pillar portion 6 in FIG. 2B), the region E1 on the outer diameter 5a side of the cage 5 where the distance between the inner side surfaces 8 and 8 is not reduced. An area E2 on the inner diameter 5b side in which the distance between the inner side surfaces 8 and 8 becomes narrower toward the inner diameter 5b side of the cage 5 (as shown in FIG. 3, the distance L1 between the areas E1> the distance L2 between the areas E2 When the inner ring 3 of one collar is pulled out in the bearing disassembling process, the circumscribed circle diameter part of the cylindrical roller 4 is pocketed from the inner diameter surface 2b of the collar part of the outer ring 2 of both collars. 7 has a shape that falls inward.

That is, by configuring the pocket 7 as described above, when the inner ring 3 is pulled out in the disassembling process of the cylindrical roller bearing 1, the circumscribed circular diameter portion of the cylindrical roller 4 is changed to the inner diameter surface 2b of the collar portion 2a of the outer ring 2. In the radial direction, it falls inward of the pocket 7 (in the direction of the cage inner diameter 5b). FIG. 3 shows a moving state of the cylindrical roller 4 in the direction of the cage inner diameters 5a and 5b by phantom lines, and shows a state where the cylindrical roller indicated by reference numeral 4 'in the figure falls in the pocket 7 in the radial direction. .
In the drawing, a portion denoted by reference numeral 9 is a holding piece (hooking portion) for preventing the cylindrical roller 4 from falling off, which is formed at the inner diameter side end portion of the column portion 6.

  In this embodiment, the end faces of the cylindrical rollers 4 are opposed to each other in the width direction (the direction indicated by the arrow W in FIGS. 1 and 2) intersecting the circumferential direction of the pocket 7 (the direction indicated by the arrow R in FIG. 3). The inner side surfaces 10 and 10 in contact with 4b face each other in parallel in the region E3 on the outer diameter 5a side of the cage 5, but the region E4 near the inner diameter 5b of the cage 5 is in the direction of the cage end surfaces 5c and 5c, respectively. A cylindrical roller inclination holding mechanism 11 is provided that is expanded in an inclined manner toward the front.

  The cylindrical roller tilt holding mechanism 11 is a step of removing the cylindrical roller 4 and the cage 5 from the pair of races, specifically, after pulling out the inner ring 3, the inner surfaces of the pockets 7 that are in contact with the roller rolling surface 4a are opposed to each other. In the step of moving (falling) the cylindrical roller 4 in the direction of the inner diameter 5b of the cage 5 (the direction indicated by the arrow D in FIGS. 1 to 3) by the regions E2, E2 on the inner diameter 5b side of the side surfaces 8, 8. In order to hold the roller end surface 4b, the respective regions E4 and E4 are held in the cage 5 so that the cylindrical roller 4 is inclined and falls in the regions E4 and E4 near the inner diameter 5b of the inner side surfaces 10 and 10 with which the end surface 4b contacts. It is comprised by the inclined surface part 11a inclined in the end surface 5c, 5c direction.

As described above, the cylindrical roller inclination holding mechanism 11 including the inclined surface portion 11a is provided in each of the regions E4 and E4 near the inner diameter 5b of the opposed inner side surfaces 10 and 10 of the pocket 7 with which the roller end surface 4b contacts. After the inner ring 3 is pulled out in the disassembling step, the cylindrical rollers 4 are held in the cage 5 by the regions E2, 2 on the inner diameter 5b side of the opposed inner side surfaces 8, 8 of the pocket 7 in contact with the roller rolling surface 4a. In the process of moving (falling) in the direction of the inner diameter 5b (the direction indicated by the arrow D in FIGS. 1 to 3), the cylindrical roller 4 is inclined and falls because of the inclined surface portion 11a, and the inclined surface portion 11a or inclined The roller end surface 4b is caught at the intersection 11c between the surface portion 11a and the parallel surface portion (parallel surface of the pocket inner surface 10) 11b, and is held in an inclined shape.
FIG. 2A shows a state in which the cylindrical roller 4 incorporated in the cage 5 is held inclined with respect to the cage inner diameter 5b.

In addition, the inclination angle θ of the inclined surface portion 11a is not particularly limited, but is preferably set to 20 minutes (approximately 0.333 degrees in 20 ′ degree display) or more, for example.
Further, in the present embodiment, the inclined surface portion 11a is provided over the entire area in the circumferential direction of the regions E4 and E4 near the inner diameter 5b of the respective inner side surfaces 10 and 10 facing each other of the pocket 7 with which the roller end surface 4b contacts. Each circumferential corner, that is, the region in the vicinity of the boundary between the opposing inner side surfaces 8 and 8 of the pocket 7 in contact with the roller rolling surface 4a (opposing surface of the column portion 6) is not particularly inclined. May be.

Here, an example of the disassembling process performed during the periodic inspection of the cylindrical roller bearing 1 of the present embodiment will be described based on the schematic cross-sectional view of FIG.
(1) First, as shown in FIG. 4A, the cylindrical roller bearing 1 to be subjected to overhaul inspection is installed on a predetermined work table X.
At this time, the rotating shaft G of the bearing 1 is installed so as to be orthogonal to the work table X (vertically) (sideways state). At this time, the inner ring 3 is installed with the end face side with the collar 3a facing upward.
(2) First, as shown in FIG. 4B, the inner ring 3 is extracted upward (in the direction indicated by the arrow U in FIG. 4), and the outer ring 2, the cage 5, and the cylindrical roller 4 are configured.
(3) When the inner ring 3 is pulled out in this way, as shown in FIG. 4C, the cylindrical roller 4 is moved closer to the cage inner diameter 5b of the pocket inner side surface 8 in contact with the roller rolling surface 4a. Can do. As a result, the cylindrical roller 4 does not protrude from the outer ring collar inner diameter 2b on the outer diameter 5a side of the cage 5.
At this time, according to the present embodiment, as shown in FIG. 4 (d), the inclined surface portion 11a (inclined cylindrical roller inclined) provided near the cage inner diameter 5b of the pocket inner surfaces 10, 10 with which the end surface 4b of the cylindrical roller 4 contacts. Because of the holding mechanism 11), the cylindrical roller 4 is inclined and falls, and the end surface 4b of the cylindrical roller 4 is held in contact with the inclined surface portion 11a or the intersection 11c of the inclined surface portion 11a and the parallel surface portion 11b. Thereby, the cylindrical roller 4 does not protrude on the outer diameter 5a side of the cage 5.
(4) Then, in the state of FIG. 4D, as shown in FIG. 4E, the outer ring 2 is withdrawn upward, and the cage 5 and the cylindrical roller 4 are assembled.
(5) Finally, the cylindrical roller 4 is moved in the outer diameter direction and pulled out. This completes the disassembly of the bearing.

That is, according to the present embodiment, in the preliminary stage of moving to the drawing operation of the outer ring 2, as shown in FIG. 4 (d), close to the cage inner diameter 5b of the pocket inner surfaces 10, 10 with which the end face 4b of the cylindrical roller 4 contacts. The cylindrical roller 4 is inclined and dropped by the cylindrical roller inclination holding mechanism 11 comprising the inclined surface portion 11a provided for the upper end surface of the cylindrical roller 4 and the lower end surface is the inclined surface portion 11a or the inclined surface portion 11a and the parallel surface portion 11b. Therefore, the cylindrical roller 4 is less likely to move in the direction of the cage outer diameter 5a due to some factor.
Therefore, when the outer ring 2 is pulled upward, there is little possibility that the collar portion 2a of the outer ring 2 collides with the roller end surface 4b of the cylindrical roller 4 or the roller chamfered portion 4c. Therefore, there is little possibility of damaging the cylindrical roller 4 or the collar portion 2a of the outer ring 2.

Further, according to the present embodiment, as shown in the disassembling work process described above, the cylindrical roller inclined cage mechanism 11 formed of the inclined surface portion 11a is held down by being inclined toward the cage inner diameter 5b. There is little possibility of moving in the direction of the outer diameter 5a of the vessel, and there is little possibility that the cylindrical roller 4 will fall out of the pocket 7 after the outer ring 2 is pulled out.
In particular, since the axles and main motors of railway vehicles require periodic inspection after disassembling the bearings every hundreds of thousands of kilometers, the bearings are disassembled relatively frequently. When the cylindrical roller bearing 1 of this embodiment is used for this purpose, the number of work steps and damage to bearing components are extremely small, and there is a special effect of preventing the occurrence of defective products. The same applies to other applications.

In addition, cylindrical roller bearings with a double collar on the inner ring and a single collar on the outer ring (NF type) and cylindrical roller bearings with a collar on the inner ring without an outer ring (N type) are also included in the present invention. In the case of cylindrical roller bearings of this type, the outer ring is first pulled out and then the inner ring is pulled out. If the cylindrical roller 4 protrudes in the inner diameter direction of the cage 5 when the inner ring is pulled out, the pulling work is performed. May be difficult, or the cylindrical roller 4 and the inner ring collar may be damaged.
Therefore, the inner surface region near the outer diameter of the cage in the pocket with which the roller rolling surface 4a contacts is a region where the distance between the inner surfaces is wider than the inner surface region near the inner diameter, and the inclined surface portion 11a is formed on the roller end surface 4b. It is set as the structure with which the inner surface area | region near the holder outer diameter of the pocket which touches is provided. Accordingly, when the inner ring is pulled out, the cylindrical roller 4 moves in the cage outer diameter direction (inside the pocket) and is held in a slanted manner, so that there is little possibility of protruding in the cage inner diameter direction.
"Example 2"

FIG. 5 shows a second embodiment of the present invention.
In the case of this embodiment, an example in which the inner ring of the first embodiment is an inner ring 3 of a collarless type (both collars 2a and 2a are provided on the outer ring 2 and the inner ring 3 is not a collar (NU type) cylindrical roller bearing. 1). In this case, the cage 5 is guided by rollers.
Other configurations, decomposition steps, and operational effects are the same as those in the first embodiment, and therefore, the same reference numerals are given to the same portions, and descriptions thereof are omitted.
"Example 3"

6 and 7 show a third embodiment of the present invention.
In the case of the present embodiment, another example of the cylindrical roller tilt holding mechanism 11 is applied, and only the specific form of the cylindrical roller tilt holding mechanism 11 is different from that of the first embodiment. Since the operational effects are the same as those of the first embodiment, the same portions are denoted by the same reference numerals and the description thereof is omitted. In the drawings, the outer ring 2 and the inner ring 3 are not shown, but are the same as those shown in the first and second embodiments. Hereinafter, an example of a specific form of the cylindrical roller inclination holding mechanism 11 applied in the present embodiment will be described.

  The cylindrical roller tilt holding mechanism 11 is configured to remove the regions E4 and E4 near the inner diameter 5b of the inner surfaces 10 and 10 of the pocket 7 with which the roller end surface 4b comes into contact, as described in the first embodiment, in the circumferential direction of the region (FIG. 7). The concave surface portion 11d is recessed in the direction parallel to the central axis of the retainer 5 (the rotation axis G of the bearing 1) (the same direction as the width direction indicated by W in the drawing) over the entire area (indicated by the arrow R). ing.

In this embodiment, the concave surface portion 11d is provided over the entire area in the radial direction (direction indicated by the arrow D in the drawing) of the regions E4 and E4 near the inner diameter 5b, but when the inner ring 3 is pulled out in the disassembling process. The cylindrical roller 4 may move (fall down) in the direction of the cage inner diameter 5b (inward of the pocket 7) in an inclined shape and be held in an inclined shape by the concave surface portion 11d, or the inclination may not be hindered. However, the design is not particularly limited and can be changed within the scope of the present invention.
Further, in this embodiment, the cylindrical roller inclined holding mechanism 11 formed of the concave surface portion 11d is provided over the entire area in the circumferential direction of the regions E4 and E4 (the direction indicated by the arrow R in FIG. 7). The corners, that is, the regions in the vicinity of the boundaries between the opposing inner side surfaces 8, 8 of the pockets 7 in contact with the roller rolling surface 4a (opposing surfaces of the column portions 6) may not be particularly concave.

  In the present embodiment, as in the first embodiment, the cylindrical roller bearing 1 of the NU type shown in FIG. 5 (the outer ring 2 has both collars 2a and 2a and the inner ring 3 has no collar) is also applicable. It is.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic longitudinal cross-sectional view which abbreviate | omits and partially shows the cylindrical roller bearing of Example 1 of this invention in cross section in radial direction. 1 shows an assembly of a cage and a cylindrical roller, which is a main part of the cylindrical roller bearing of Embodiment 1 of the present invention, and (a) shows a cylindrical roller incorporated in a cage for a cylindrical roller bearing; The state which is inclined and held in the direction is indicated by a solid line, and is a schematic longitudinal cross-sectional view which is shown by being cut in the radial direction and partially omitted, and (b) is a cross-sectional view of a pillar portion of the cage. FIG. 2A is a cross-sectional view taken along the line II-II in FIG. FIG. 4 is a schematic cross-sectional view showing a part of the disassembling process, in which (a) shows a state where a cylindrical roller bearing is installed on a workbench, (b) shows a state where an inner ring is pulled upward, and (c) shows a cylindrical roller once. The state in which the cylindrical roller is moved toward the inner diameter of the cage and the cylindrical roller is not projected to the inner diameter of the outer ring collar, (d) is the state in which the cylindrical roller is tilted and held down by the cylindrical roller inclination holding mechanism, and (e) is ( In the state of d), the outer ring is pulled upward, and (f) shows the state in which the cylindrical roller is pulled out from the pocket of the cage. It is a general | schematic longitudinal cross-sectional view which abbreviate | omits and partially shows the cylindrical roller bearing of Example 2 of this invention in a radial direction. An assembly of a cage and a cylindrical roller, which is a main part of the cylindrical roller bearing according to the third embodiment of the present invention, is shown in cross section in the radial direction and partially omitted, and (a) shows a cage for a cylindrical roller bearing. A state in which the incorporated cylindrical roller is held inclined with respect to the inner diameter direction of the cage is indicated by a solid line, and is a schematic longitudinal sectional view showing a section in the radial direction and a part of which is omitted. It is pillar part sectional drawing. FIG. 6A is a cross-sectional view taken along the line IV-IV in FIG. It is a general | schematic longitudinal cross-sectional view which abbreviate | omits and shows the conventional cylindrical roller bearing, while partially cross-sectioning in radial direction. FIG. 8 is an assembly of the cylindrical roller bearing retainer and the cylindrical roller, and shows a state in which the cylindrical roller is moving in the inner diameter direction of the cage by a solid line, and is a schematic longitudinal section that is cut in the radial direction and partially omitted. FIG. It is sectional drawing which showed the movement state to the inner-outer-outer diameter direction of the cylindrical roller in the prior art shown in FIG. 8 with the virtual line. FIG. 9 is a schematic cross-sectional view showing a part of the disassembling process of the prior art shown in FIG. 8, where (a) is a state where a cylindrical roller bearing is installed on a work table, (b) is a state where an inner ring is pulled upward, (C) is a state in which the cylindrical roller is once moved in the inner diameter direction of the cage and the cylindrical roller is not protruded to the inner diameter of the outer ring collar, and (d) is a state in which the cylindrical roller moves in the outer diameter direction of the cage due to some factor. A state of protruding to the inner diameter, (e) shows a state in which the cylindrical roller has dropped from the pocket of the cage due to some factor. It is a general | schematic longitudinal cross-sectional view which abbreviate | omits and shows a part of other conventional cylindrical roller bearing in a radial direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical roller bearing 2 Outer ring 3 Inner ring 4 Cylindrical roller 4a Rolling surface 4b End surface 5 Cage 5b Inner diameter 7 Pocket 8 Inner surface E1 which contacts a rolling surface Area | region E2 The space between inner surfaces is not narrow E2 The space | interval between inner surfaces is narrow Region 10 The inner surface 11 where the end face of the cylindrical roller contacts the cylindrical roller tilt holding mechanism

Claims (7)

One of the bearing rings is incorporated into a cylindrical roller bearing with both collars and the other bearing ring has one collar or no collar, and has a plurality of pockets for holding a plurality of cylindrical rollers in the circumferential direction,
The pockets are regions that face each other in the circumferential direction and the inner side surface that contacts the rolling surface of the cylindrical roller is a region in which the distance between the inner side surfaces is not narrowed and narrowed toward the inner diameter side or outer diameter side of the cage. When the bearing ring with one collar or no collar is pulled out in the bearing disassembly process, the circumscribed circle diameter part of the cylindrical roller is inside or outside the pocket from the inner diameter surface or outer diameter surface of the collar portion of both collar rings. A cage for a cylindrical roller bearing that falls in the direction,
Opposing in the width direction intersecting the circumferential direction of the pocket, provided near the outer diameter or inner diameter of the retainer on the inner surface where the end surface of the cylindrical roller contacts, and removing the cylindrical roller and the retainer from the pair of bearing rings, A cage for a cylindrical roller bearing, comprising: a cylindrical roller tilt holding mechanism in which the cylindrical roller is inclined down toward the inner diameter or outer diameter of the cage on the inner surface and the roller end surface is held.   2. The cylindrical roller bearing retainer according to claim 1, wherein the cylindrical roller inclined holding mechanism is configured by an inclined surface portion inclined in an end surface direction of the cage.   2. The cage for a cylindrical roller bearing according to claim 1, wherein the cylindrical roller tilt holding mechanism is configured by a concave surface portion recessed in a direction parallel to the central axis of the cage.   The cylindrical roller bearing retainer according to claim 2 or 3, wherein the cylindrical roller tilt holding mechanism is formed closer to the inner diameter or outer diameter of the inner surface of the inner surface with which the end surface of the cylindrical roller contacts.   The cage for a cylindrical roller bearing according to claim 2, wherein an inclination angle of the inclined surface portion is 20 minutes or more.   A cylindrical roller bearing using the cage according to any one of claims 1 to 5. The cylindrical roller bearing according to claim 6, which is incorporated for supporting an axle of a railway vehicle.

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