JP2007205535A - Roller bearing cage and rolling bearing - Google Patents

Abstract

Provided are a rolling bearing cage and a rolling bearing which do not damage a cage when assembling rolling elements and do not damage a raceway surface of a bearing ring.
A rolling bearing retainer having pockets 20 and 30 for inserting rolling elements 6 and 8 from an outer diameter side or an inner diameter side to hold the rolling elements so as to be freely rotatable, and an annular portion formed in a ring shape 14 and a plurality of pillars 16 and 18 that project in the axial direction at predetermined intervals on both side surfaces of the annular portion to form the pocket, and on the outer diameter side or inner diameter side of the pocket Openings 21 and 31 are provided for inserting the rolling elements from the outer diameter side or the inner diameter side.
[Selection] Figure 1

Description

  The present invention relates to an improvement in assemblability when a rolling element is incorporated into a rolling bearing cage.

  Conventionally, since a large load or impact is applied in a radial direction to, for example, an automobile axle or a main shaft of a generator, various roller bearings having high load capacity against the load or impact have been used for supporting these loads. Yes. Among them, especially spherical roller bearings have a very high radial load capacity, and can load large impact loads and heavy loads in the radial direction, and can also load bidirectional axial loads. Widely used as an optimum bearing for such applications (see Patent Document 1).

  As a configuration of the self-aligning roller bearing, for example, a configuration as shown in FIG. Such a self-aligning roller bearing includes an inner ring 2 and an outer ring 4, which are arranged to face each other so as to be relatively rotatable, an inner ring raceway surface 2b formed on the inner ring outer diameter surface 2a, and an outer ring raceway surface formed on the outer ring inner diameter surface 4a. A retainer having a plurality of rollers 6 and 8 incorporated in a double row (two rows) so as to be able to roll between 4b and a pocket 20 and 30 for holding the plurality of rollers 6 and 8 rotatably one by one. 10. The rollers 6 and 8 have a shape in which outer peripheral surfaces 6a and 8a swell into a spherical shape (convex spherical shape). Further, flanges 2e and 2f are formed at both ends of the inner ring outer diameter surface 2a, and a guide wheel 12 is provided along the circumferential direction at the center of the inner ring outer diameter surface 2a. , 2f and the guide wheel 12, the rollers 6, 8 are positioned between the inner ring raceway surface 2b and the outer ring raceway surface 4b.

  In this case, the inner ring raceway surface 2b is composed of two concave spherical surfaces (the raceway surface 2c and the raceway surface 2d) having different curvature radii, and the outer ring raceway surface 4b is composed of the two inner ring raceway surfaces 2c, 2d. And is formed as one concave spherical surface having a center of curvature radius at the center of the bearing. The inner ring raceway surfaces 2c and 2d and the outer ring raceway surface 4b have respective curvature radii so as to form concave spherical surfaces along the shapes of the outer peripheral surfaces (convex spherical surfaces) 6a and 8a of the rollers 6 and 8. By forming the inner ring raceway surfaces 2c and 2d and the outer ring raceway surface 4b in this manner, the rollers 6 and 8 incorporated between the inner ring raceway surfaces 2c and 2d and the outer ring raceway surface 4b The outer peripheral surfaces 6a, 8a are in line contact with the inner ring raceway surfaces 2c, 2d and the outer ring raceway surface 4b, respectively, while the shafts are inclined in opposite directions with respect to the rotation axis of the bearing, and the outer surfaces 6b, 8b are brought into contact with the inner ring. The flanges 2e and 2f of the outer diameter surface 2a are brought into contact with the guide wheels 12 of the inner ring outer diameter surface 2a and the inner side surfaces 6c and 8c thereof are respectively positioned in this state between the inner ring raceway surface 2b and the outer ring raceway surface 4b. Is done.

  Such a self-aligning roller bearing retainer 10 has a ring shape passing between double row (two rows) rollers 6 and 8 as shown in FIGS. 3 (a) and 4 (a) to (c). And a plurality of column portions 16 and 18 projecting in the axial direction at predetermined intervals on both side surfaces of the annular portion 14. Pockets 20 and 30 for holding the rollers 6 and 8 are formed by the column parts 16 and 18. In this case, the column portions 16 and the column portions 18 are alternately provided so as to protrude in the opposite axial directions, and similarly, the pockets 20 and the pockets 30 are also provided alternately in the opposite axial directions. As described above, the cage 10 has a comb shape in which the pocket 30 is positioned on the opposite side of the column portion 16 and the pocket 20 is positioned on the opposite side of the column portion 18 with the annular portion 14 interposed therebetween (comb shape). Machined cage). Note that the axially opposite end portions of the outer diameter surface of the cage 10 (outer end portions of the surfaces facing the outer ring raceway surface 4b of the column portions 16 and 18) are inclined with a diameter decreasing toward the outer side in the circumferential direction. Surfaces 16a and 18a are respectively provided.

Here, a process of incorporating the roller 6 and the roller 8 into the cage 10 will be described (see FIG. 3B).
First, any one of the rollers (for example, the right row of rollers 8) is inserted into a pocket (for example, the right side pocket 30) of the cage 10, and in this state (the state in which the rollers 6 are not inserted in the left row). Thus, the roller 8 together with the cage 10 is assembled into the raceway surface 2 d of the inner ring 2.
Next, with the cage 10 elastically deformed radially outward (the column portion 16 in the direction of the arrow s), the left row of rollers 6 is inserted into the insertion groove of the flange portion 2e of the inner ring 2 from the left side surface of the cage 10. While sliding along 2g, it is inserted into the pocket 20, and the inner lower end 6d of the roller 6 is brought into contact with the inner ring raceway surface 2c.
Subsequently, the roller 6 is pushed so as to slide up along the inner ring raceway surface 2c while the inner lower end 6d of the roller 6 is in contact with the inner ring raceway surface 2c.
Further, the roller 6 is pushed further into the flange portion 2e of the inner ring outer diameter surface 2a until the inner side surface 6c comes into contact with the guide wheel 12, whereby the roller 6 is pushed into the inner ring raceway surface 2c and the outer ring raceway surface 4b. It can be positioned and incorporated in between.

  Thus, when the roller 6 (8) is incorporated in the pocket 20 (30) of the cage 10, the cage 10 must be elastically deformed radially outward. When excessive stress is applied, for example, the cage 10 may be damaged, and the rollers 6 and 8 may not be stably held. Further, the roller 6 (8) is slid along the inner ring raceway surface 2c (2d) while the inner lower end 6d (8d) of the roller 6 (8) is in contact with the inner ring raceway surface 2c (2d). For example, the inner ring raceway surface 2c (2d) may be damaged due to being pushed in.

As a measure for avoiding such inconvenience, for example, a measure for incorporating the roller 6 (8) into the pocket 20 (30) from the outer diameter side of the cage 10 is considered as an example. However, as shown in FIGS. 4B and 4C, the opening width of the pocket 20 (30) on the outer diameter side of the cage (the opposing side surfaces 16b, 16c (18b) of the two adjacent pillars 16 (18)). , 18c) is less than the outer diameter of the roller 6 (8), and the tips of the opposing side surfaces 16b, 16c (18b, 18c) of the two adjacent pillars 16 (18) are smaller than the outer diameter of the roller 6 (8). The claw portion 10a for stably supporting the roller 6 (8) in the pocket 20 (30) is provided in the portion so as to narrow the opening width w of the pocket 20 (30) on the outer diameter side of the cage. Yes. For this reason, in the cage 10 of the current configuration, the roller 6 (8) cannot be incorporated into the pocket 20 (30) from the outer diameter side of the cage 10.
JP 2001-12463 A

  The present invention has been made to solve such a problem, and the purpose thereof is to prevent damage to the cage when assembling the rolling elements, and to prevent damage to the raceway of the raceway. An object of the present invention is to provide a cage for a rolling bearing and a rolling bearing.

  In order to achieve such an object, a rolling bearing cage according to the present invention is a rolling bearing cage having a pocket for inserting and rolling a rolling element from an outer diameter side or an inner diameter side. An annular portion formed in a ring shape, and a plurality of pillars that project in the axial direction at predetermined intervals on both side surfaces of the annular portion to form the pocket, An opening for inserting the rolling element from the outer diameter side or the inner diameter side is provided on the diameter side or the inner diameter side.

  In such a configuration, the pocket has a holding part for holding the rolling element, an introduction part for guiding and introducing the rolling element inserted into the opening to the holding part, and the rolling element as a holding part stably. The holding part is formed in a concave arc shape along the shape of the outer peripheral surface of the rolling element, and is connected to the introduction part and the support part, respectively. In this case, the introduction part has an inclined shape spreading toward the opening. Moreover, the holding | maintenance part and the introducing | transducing part are connected via the cusp-like connection part.

  Further, the rolling bearing according to the present invention includes a plurality of rolling rings that are rotatably incorporated between a pair of bearing rings that are arranged to face each other so as to be relatively rotatable, and a raceway surface that is formed on a facing surface of each bearing ring. A rolling element and a cage having a pocket for holding the rolling element are provided. Any of the above-described rolling bearing cages according to the present invention is used as the cage.

  According to the rolling bearing cage and rolling bearing of the present invention, the rolling element is inserted from the outer diameter side or the inner diameter side of the pocket of the cage, so that the cage is not damaged, and the raceway surface of the bearing ring. It is possible to incorporate the rolling element into the cage without causing any damage to the assembly.

Hereinafter, a rolling bearing cage and a rolling bearing according to the present invention will be described with reference to the accompanying drawings.
As a type of bearing to which the present invention can be applied, for example, a double-row cylindrical roller bearing or a self-aligning roller bearing can be assumed, but in the following, a bearing type is a self-aligning roller bearing as an example. This will be described assuming a certain case. At that time, the same reference numerals are assigned to the same components as those of the conventional rolling bearing cage and the self-aligning roller bearing (FIGS. 3A and 3B and FIGS. 4A to 4C). Therefore, the description is omitted.

1 (a), 1 (b) and FIGS. 2 (a) to 2 (c) show a rolling bearing cage and a self-aligning roller bearing according to an embodiment of the present invention.
A rolling bearing retainer 10 (hereinafter simply referred to as a retainer 10) according to the present embodiment has pockets 20 and 30 for inserting rolling elements (rollers) 6 and 8 from the outer diameter side and holding them freely. is doing. In the present embodiment, the cage 10 includes a ring-shaped portion 14 formed in a ring shape, and a plurality of pockets 20 and 30 that protrude in the axial direction at predetermined intervals on both side surfaces of the ring-shaped portion 14. The openings 20, 31 for inserting the rollers 6, 8 from the outer diameter side are provided on the outer diameter side of the pockets 20, 30. In this case, the cage 10 holds the rollers 6 and 8 rotatably in the pockets 20 and 30 one by one. In the present embodiment, the column portions 16 and 18 of the cage 10 are provided to be inclined with respect to the rotation axis of the bearing so that the outer diameter decreases from the proximal end toward the distal end.

  In the present embodiment, the pockets 20 and 30 guide and introduce the holding portions 22 and 32 for holding the rollers 6 and 8 and the rollers 6 and 8 inserted into the openings 21 and 31 to the holding portions 22 and 32, respectively. Introducing portions 23 and 33 for carrying out, and supporting portions 24 and 34 for stably positioning the rollers 6 and 8 on the holding portions 22 and 32 are provided. In this case, the holding portion 22 (32) is formed in a concave arc shape (concave spherical shape) along the shape of the outer peripheral surfaces 6a, 8a of the rollers 6, 8, and the introduction portion 23 (33) and the support portion. 24 (34), respectively. The holding portions 22 and 32, the introduction portions 23 and 33, and the support portions 24 and 34 are provided on the side surfaces facing the circumferential direction of the two adjacent column portions 16 and 18 forming one pocket 20 and 30, respectively. It has been.

Further, the introduction portions 23 and 33 of the pockets 20 and 30 are inclined so as to expand toward the openings 21 and 31 of the pockets 20 and 30. In the present embodiment, the introduction portion 23 (33) is, for example, an inclined surface 26 (36) that forms a flat shape extending from the connecting portion 25 (35) to the holding portion 22 (32) toward the opening 21 (31). It is formed as.
Moreover, in this embodiment, the holding | maintenance part 22 (32) and the introducing | transducing part 23 (33) are connected via the cusp-like connection part 25 (35).
When the pockets 20 and 30 are formed in the cage 10 by cutting (cutting) at both ends of the closed portions 27 and 37 of the pockets 20 and 30 (base ends of the column portions 16 and 18 of the cage 10). Are provided so that the outer diameter side and the inner diameter side of the pockets 20 and 30 communicate with each other.

Here, in the present embodiment, a process of incorporating the rollers 6 and 8 into the cage 10 will be described (see FIG. 1B).
First, any one of the rollers (for example, the right row of rollers 8) is inserted into a pocket (for example, the right side pocket 30) of the cage 10, and in this state (the state in which the rollers 6 are not inserted in the left row). Thus, the roller 8 together with the cage 10 is assembled into the raceway surface 2 d of the inner ring 2.
Next, the rollers 6 in the left row are inserted into the pockets through the openings 21 of the pockets 20 provided on the outer diameter side (the outer diameter side of the pockets 20) of the cage 10, and are slid along the introduction portion 23. A part of the outer peripheral surface 6 a of the roller 6 is brought into contact with a connecting portion 25 between the introduction portion 23 and the holding portion 22.
Subsequently, the roller 6 is pushed toward the holding portion 22 of the pocket 20 (in the direction of the arrow t) while a part of the outer peripheral surface 6 a of the roller 6 is in contact with the connecting portion 25.
Accordingly, the roller 6 slides down along the concave spherical surface of the holding portion 22 and is stably positioned on the holding portion 22 by the support portion 24 of the pocket 20, and the outer peripheral surface 6 a of the roller 6 is the concave spherical surface of the holding portion 22. To touch. At this time, the outer surface 6b of the roller 6 is in contact with the flange 2e of the outer surface 2a of the inner ring and the inner surface 6c is in contact with the guide wheel 12, so that the roller 6 is in contact with the inner ring raceway surface 2c and the outer ring raceway surface 4b. It can be positioned and incorporated in between.

Thus, according to the cage 10 of the present embodiment, when the rollers 6 (8) are assembled into the pockets 20 (30) of the cage 10, the rollers 6 can be assembled from the outer diameter side of the cage 10. The cage 10 does not need to be elastically deformed radially outward, and excessive stress is not applied to the cage 10. Therefore, the rollers 6 and 8 can be smoothly assembled into the pocket 20 (30) of the cage 10 without damaging the cage 10, and the rollers 6 and 8 can be stably stabilized by the pocket 20 (30). Can be held.
Further, according to the cage 10 of the present embodiment, the rollers 6 (8) are kept in contact with the inner ring raceway surface 2c (2d) while the inner lower end 6d (8d) of the rollers 6 (8) is kept in contact with the inner ring raceway surface 2c (2d). ) Is not required to be slid up along the inner ring raceway surface 2c (2d). For this reason, when assembling the roller 6 (8) into the pocket 20 (30) of the cage 10, the inner ring raceway surface 2c (2d) is not damaged, and as a result, the rollers 6 and 8 are connected to the inner ring raceway surface. It can be smoothly rolled between 2b (2c, 2d) and the outer ring raceway surface 4b.

In addition, this invention is not limited to the structure shown in embodiment mentioned above, Even if it changes as follows, the same effect can be acquired.
For example, in the above-described embodiment, when a rolling element is incorporated into the pocket of the cage, the rolling element is inserted from the outer diameter side of the cage, and instead, the rolling element is inserted from the inner diameter side of the cage. It is good also as a structure built in. In this case, for example, a configuration in which the introduction portion of the pocket is provided on the inner diameter side, the support portion of the pocket is provided on the outer diameter side, and the introduction portion and the support portion are connected to the holding portion, respectively, is exemplified.

  In addition, the cage is configured as an integrated configuration that holds the rolling elements of each row together, but instead, for example, as a configuration that combines separate cages that hold the rolling elements independently for each row. Also good. In addition, the pillars on both sides of the annular part of the cage are alternately projected in the opposite axial direction, but instead, the pillars on both sides are in phase (with the annular part It may be provided so that the pillar part on the other side face is located on the opposite side of the pillar part on the one side face. In addition, the holding portion and the introduction portion of the pocket of the cage are connected via a pointed connecting portion, but instead, for example, the holding portion and the introduction portion are connected so as to form an R shape. May be. In the above-described embodiment, the material of the cage is not particularly limited, but any material such as an alloy such as high-strength brass or carbon steel, or a synthetic resin such as polyamide can be used.

It is a figure which shows the structural example of the rolling bearing which concerns on one Embodiment of this invention, Comprising: (a) is sectional drawing, (b) is sectional drawing for demonstrating the assembly process of a rolling element. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structural example of the rolling bearing retainer which concerns on one Embodiment of this invention, Comprising: (a) is sectional drawing, (b) is the top view seen from the arrow A direction of the figure (a) (C) is the top view seen from the arrow B direction of the figure (a). Sectional drawing which shows the structural example of the conventional rolling bearing. It is a figure which shows the structural example of the conventional cage for rolling bearings, Comprising: (a) is sectional drawing, (b) is the top view seen from the arrow A direction of the figure (a), (c), The top view seen from the arrow B direction of the figure (a).

Explanation of symbols

2 Inner rings 2 b, 2 c, 2 d Inner ring raceway surfaces 2 e, 2 f Ridge part 4 Outer ring 4 b Outer ring raceway surfaces 6, 8 Roller 10 Cage 12 Guide wheel 14 Ring part 16, 18 Pillar part 20, 30 Pocket 21, 31 Opening 22, 32 Holding part 23, 33 Introduction part 24, 34 Support part 25, 35 Connection part 26, 36 Inclined surface 27, 37 Closure part 28, 38 Relief part

Claims (5)

A rolling bearing retainer having a pocket for inserting and rolling the rolling element from the outer diameter side or the inner diameter side,
An annular part formed in a ring shape;
A plurality of pillars that project in the axial direction at predetermined intervals on both side surfaces of the annular part and form the pockets;
A rolling bearing retainer characterized in that an opening for inserting a rolling element from the outer diameter side or the inner diameter side is provided on the outer diameter side or inner diameter side of the pocket.   The pocket includes a holding part for holding the rolling element, an introduction part for guiding and introducing the rolling element inserted into the opening to the holding part, and a support part for stably positioning the rolling element on the holding part. The holding portion is formed in a concave arc shape along the shape of the outer peripheral surface of the rolling element, and is connected to the introduction portion and the support portion, respectively. The cage for rolling bearings as described.   The rolling bearing retainer according to claim 2, wherein the introduction portion has an inclined shape that widens toward the opening.   The rolling bearing retainer according to claim 2 or 3, wherein the holding portion and the introduction portion are connected to each other through a pointed connecting portion. A pair of races arranged to face each other so as to be relatively rotatable;
A plurality of rolling elements incorporated in a freely rolling manner between the raceway surfaces formed on the opposing surfaces of the raceways,
A rolling bearing comprising a cage having pockets for holding rolling elements,
A rolling bearing comprising the cage for a rolling bearing according to any one of claims 1 to 4 as the cage.

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