JPH1182518A - Cage for rolling bearing and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit sinking quantity of rollers to nearly the same quantity as caulking type even though it is an integral type, by extending bore parts of an annular part in the radial directions, and by projecting inter-pocket parts of an extended part prominent more inward than a columnar part, to the center line side of the bearing. SOLUTION: A cage 1 is integrally provided with an extended part 1e by respectively extending bore parts of both annular parts 1a to the inside. The extended part 1e is thinner than the annular parts 1a, and forms an annular shape prominent more inward than a columnar part 1b, and the surface of the bearing center line O-O side continues to the internal surface of the annular parts 1a. Projecting parts 1f projecting to the bearing center line O-O side are formed at parts between pockets 1c of the extended part 1e. The projecting parts 1f positioned on both sides of the roller 2 enable the inward shift of the roller to be regulated within a definite range. By the way, projecting parts 1f may be provided on the outside of the cage 1, and the projecting parts may regulate the outward shift of the rollers 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cage for a roller bearing used in general machines such as a main motor, and a method of manufacturing the same.

[0002]

2. Description of the Related Art As shown in FIG. 5, a brass piercing cage (10), which is one of the cages for cylindrical roller bearings, has a main body (11), which is a comb-like ring, and a ring-like body. The lid (12) is composed of parts of a tack (13) for connecting the main body (11) and the lid (12). The main body (11) is formed with a plurality of axial stud holes (14) at a plurality of positions, and the lid (12) is also provided with a plurality of stud holes corresponding to the stud holes (14) of the main body (11). (15) is formed. The space defined by the main body (11) and the lid (12) is a pocket (16) for holding the cylindrical rollers in a circumferentially equidistant position, and opposing surfaces in the circumferential direction that sandwich the pocket (16). (17:
In the following, each of the pocket surfaces is formed in an arc shape having a diameter larger than the outer circumference of the rollers. Therefore, as shown in FIG. 6, the outer peripheral surface (20) of the roller (20) housed in the pocket (16) is
A gap (18: pocket gap) in the radial direction of the roller (20) is formed between a) and the pocket surface (17) of the main body (11). (2
0) can be moved in the radial direction of the holder (10) within a predetermined range (S1) (S2).

[0003] The conventional retainer (10) is assembled by a main body (11).
After storing the rollers (20) in the pockets (16), the lid (12)
Is applied to the body (11), the rivet (13) is inserted into the rivet holes (14, 15) of the body (11) and the lid (12), and the tip of the rivet (13) is crimped. I have. The assembled retainer (10) is assembled into an inner diameter portion of an outer ring (30: see FIG. 6) to form a unit. Further, by inserting an inner ring (not shown) into the inner diameter side of this unit, a cylindrical roller bearing is assembled. Can be

After the bearing is assembled, the retainer (10) can be moved in the radial direction. The amount of movement of the retainer (10) at that time is, as shown in FIG. To
The raceway guide surface (in the outer ring guide type as shown, the outer ring 30
(T) between the outer peripheral surface of the cage (10) and the outer peripheral surface of the cage (10).
Becomes At this time, the movement amounts (S1, S2) of the rollers (20) are set to be larger than the gaps (t), respectively (S1> t, S2).
> T). On the other hand, in the roller guide type bearing, the smaller one of the roller movement amounts (S1, S2) becomes the movement amount of the cage (10), and at this time, the smaller movement amount (S1 or S2)
Is set smaller than the gap (t) (S1 <to).
r S2 <t).

[0005]

As described above, in the conventional cage, the process of caulking the studs is required, so that the number of processes is increased, and furthermore, there are problems such as improper caulking and loosening of the studs when the bearing is used. Failure to do so may occur.

As a solution to the above problems, a cage which does not require a caulking step by integrally molding a main body and a lid can be considered. As shown in FIG. 4, the integrated retainer includes a pair of annular portions (1a) spaced apart in the axial direction,
It has a plurality of pillars (1b) formed integrally with both annular parts (1a), extending in the axial direction at equal circumferential positions, and bridging between the annular parts (1a). The pocket (1c) is formed between the pillars (1b).

However, in the above-mentioned integrated cage, as shown in FIG. 7 (b), when assembling the bearing, the rollers (2) are normally held in the cage (1) from the radial direction (the inner diameter side in the drawing).
Forcibly into the pocket (1c)
The roller (2) is pressed into the pocket (1c) by elastically deforming the inner diameter side of the periphery of the pocket (1c) of the retainer (1). At this time, the pressure inlet (1 g: the inner diameter side of the pocket peripheral portion) of the retainer (1) is cut off in the radial direction so that the roller (2) can be pushed in smoothly, and the inner diameter (D) of the pressure inlet is changed to the conventional value. Since the size is larger than the caulking type (a in the same figure), the amount of movement of the roller (2) toward the inner diameter side (S1 ′: the amount of roller drop) is larger than that of the conventional product (S1). Therefore, when the retainer (1) is assembled into the outer ring (30), when the inner ring is inserted into the inner diameter side of the retainer (1), the inner ring easily interferes with the roller (2), and the inner ring is smoothly inserted. It becomes difficult and workability deteriorates.

Accordingly, an object of the present invention is to provide a roller bearing retainer and a method of manufacturing the roller bearing retainer, which can reduce the amount of roller dropping even to a conventional product (caulking type) even if it is an integral type.

[0009]

In order to achieve the above object,
The roller bearing retainer according to the present invention has a pair of annular portions spaced apart in the axial direction, and is formed integrally with the two annular portions, extends in the axial direction at equal circumferential positions, and bridges between the annular portions. And a pocket for accommodating the roller by forming a gap between the adjacent pillars and the outer peripheral surface of the roller,
In the one in which the roller is allowed to move in the radial direction by the gap, the inner or outer diameter portion of the annular portion is extended in the radial direction, and the extending portion protrudes toward the inner or outer diameter side of the pillar portion. In addition, the portion between the pockets of the extended portion is made to protrude toward the bearing center line, and the amount of movement of the roller in the radial direction is regulated by the protruding portion.

In this case, it is desirable that the extending portion is formed thinner than the annular portion.

The above-mentioned retainer comprises a pair of annular portions spaced apart in the axial direction, a column portion arranged at equal intervals in the circumferential direction and extending in the axial direction to bridge between the annular portions, and an inner diameter of the annular portion. Extending in the radial direction from the portion or the outer diameter portion, and extending from the pillar portion to the inner diameter side or the outer diameter side, and between the adjacent pillar portions,
A cage material having a pocket that accommodates the roller by interposing a gap between the roller outer peripheral surface and the roller and allows the roller to move in the radial direction by the gap is integrally formed. After accommodating the roller, it can be manufactured by projecting the portion between the pockets of the extension portion toward the bearing center line so as to regulate the amount of movement of the roller in the radial direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS.

The retainer (1) according to the present invention is of an integral type similar to the retainer shown in FIG. 4, and is formed integrally with a pair of annular portions (1a) spaced apart in the axial direction and both annular portions (1a). It is formed of a pillar (1b) that is formed, extends in the axial direction at equal circumferential positions, and bridges between the annular portions (1a). Adjacent pillars (1b)
A pocket (1c) for accommodating the cylindrical roller is formed therebetween, and the rollers in the pocket (1c) are allowed to move in the radial direction by a pocket gap.

As shown in FIGS. 1 and 2, the retainer (1) is formed integrally with an extended portion (1e) by extending the inner diameter portions of both annular portions (1a) toward the inner diameter side. The extending portion (1e) is thinner than the annular portion (1a), and has an annular shape protruding toward the inner diameter side than the column portion (1b). , And continuous with the inner surface of the annular portion (1a).

At the portion between the pockets (1c) of the extension (1e), a substantially triangular-shaped projection (1f) is formed to project inward, that is, toward the bearing center line OO. The protruding portion (1f) is formed in a wedge shape in which the protruding amount increases from both ends in the circumferential direction toward the center and toward the inner diameter (the protruding portion 1f).
Outer side surface is depressed corresponding to the protruding shape),
The most protruding portion (1f1: the inner diameter end of the center c in the circumferential direction) reaches a space on the outer diameter side of the outer peripheral surface (2a) of the roller (2).
This protruding portion (1f) is provided in each pocket (1f) of both extension portions (1e).
c) It can be formed by pressing a jig (not shown) in the shape of a triangular pyramid from the outside against the space portion and plastically deforming the jig inside. As described above, since the extending portion (1e) is formed to be thinner than the annular portion (1a), cracks and the like hardly occur in the base material even during such pressurization, and the base material can be smoothly deformed. it can. Considering the workability during pressurization,
As a material for the cage (1), a soft metal such as a copper alloy or a low carbon steel or a nonmetallic material (a material having an elongation of 15% or more in a tensile test based on JIS Z 2241 is preferable) is preferable. desirable.

This cage can be manufactured by the following procedure. First, a cage material having an annular portion (1a), a pillar portion (1b), and an extending portion (1e) integrally, and having a plurality of pockets (1c) between adjacent pillar portions (1b) is provided. Molding.
Next, the roller (2) is accommodated in each pocket (1c) of the cage material, and then the portion between the pockets of the extended portion (1e) is deformed toward the center of the bearing by pressing or the like, and the protrusion (1f) is formed. Is formed to obtain the retainer (1) shown in FIG. According to the above procedure, the step of caulking a stud unlike a conventional product is not necessary, so that the number of steps can be reduced, and further, problems such as improper caulking and loosening of a stud when a bearing is used can be avoided.

With the above configuration, as shown in FIG. 3, the protrusion (1f) located on both sides of the roller (2) allows the roller (2) to move (roller down) to the inner diameter side within a certain range (S). )
It is possible to regulate by. Therefore, even in the case of an integrated cage (1) in which the pressure inlet (1 g) of the roller (2) is increased, the roller drop amount (S) can be made smaller than that of the conventional product (caulking type). By appropriately selecting the shape and the projecting amount of the projecting portion (1f), it is possible to realize an appropriate roller drop amount (S). The roller drop amount (S) at this time is larger than the gap (t: see FIG. 6) in the bearing of the raceway guide type, and smaller than the gap (t) in the roller guide type bearing.

In FIG. 3, the pocket surface (1) of the cage (1) is shown.
d) is an arc portion (1d1) centered on the intersection with the roller pitch circle (p) and the equiaxed axis (q: refer to FIG. 1).
And the straight line portion (1d2) in the radial direction are smoothly continued (so that the straight line portion 1d2 is tangent to the arc portion 1d1).
Although the case where it is formed is illustrated, the shape of the pocket surface (1d) is not limited to this. For example, as shown in FIG. 7B, a step is formed between the arc portion (1d1) and the straight portion (1d2). Part (1d
The pocket surface (1d) having the shape formed in 3) may be used.

In the above description, since the present invention is applied to a bearing having flanges (3a, 3b: see FIG. 2) at both ends in the axial direction of the outer ring (3), the projection (1f) is provided with the retainer (3). Although the case where it is provided on the inner diameter side of 1) is illustrated, conversely, in order to apply to a bearing having flanges at both ends of the inner ring, a projection (1f) is provided on the outer diameter side of the cage (1). And the rollers (2)
May be restricted from moving toward the outer diameter side. In this case, the extension part (1e) is formed on the outer diameter side of the annular part (1a),
A protruding part (1f) is provided on the bearing center line OO side of the extension part (1e).

The present invention is not limited to the cylindrical roller bearing described above, but can be widely applied to other roller bearings such as tapered roller bearings.

[0021]

As described above, according to the present invention, even in the case of an integral type cage, the amount of roller drop can be suppressed to the same level as that of the conventional caulking type cage. When the other bearing ring is inserted after the retainer has been incorporated into the bearing, interference with the bearing ring can be prevented, and a smooth insertion operation can be realized.

[Brief description of the drawings]

FIG. 1 is a front view of a roller bearing retainer according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a plan view of the integrated cage.

FIG. 5 is a plan view (FIG. 5A) of a conventional cage (caulking type),
And a sectional view in a direction perpendicular to the axis (FIG. B).

FIG. 6 is an enlarged cross-sectional view in a direction perpendicular to an axis of a conventional retainer (caulking type).

FIG. 7 is a sectional view in a direction perpendicular to the axis of the cage,
(A) shows a swaged type, and (b) shows an integrated type.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cage 1a Annular part 1b Column part 1c Pocket 1e Extension part 1f Projection part 2 Roller OO bearing center line

Claims (3)

[Claims] 1. A vehicle comprising: a pair of annular portions spaced apart in an axial direction; and a column formed integrally with the two annular portions and extending in an axial direction at equal circumferential positions to bridge between the annular portions. Then, between adjacent pillar portions, a pocket is formed to accommodate the roller by interposing a gap between the outer peripheral surface of the roller, and the gap allows the roller to move in a radial direction, Extending the inner diameter portion or the outer diameter portion of the annular portion in the radial direction, providing an extending portion protruding to the inner diameter side or the outer diameter side than the pillar portion,
Further, a roller bearing retainer in which a portion between the pockets of the extending portion projects toward the bearing center line, and the amount of movement of the roller in the radial direction is regulated by the projecting portion. 2. The roller bearing retainer according to claim 1, wherein the extending portion is formed thinner than the annular portion. 3. A pair of annular portions spaced apart in the axial direction, a column portion arranged at equal intervals in the circumferential direction, extending in the axial direction, and bridging between the annular portions, an inner diameter portion or an outer diameter of the annular portion. Extending from the portion in the radial direction, and extending from the pillar portion to the inner diameter side or the outer diameter side, and between adjacent pillar portions, a gap is interposed between the outer peripheral surface of the roller and the roller. The cage material having a pocket that accommodates and allows the roller to move in the radial direction by the gap is integrally formed, and after the rollers are accommodated in the cage material pocket, the portion between the pockets of the extended portion is A method for manufacturing a cage for roller bearings, characterized in that the roller is projected toward the center line of the bearing so that the amount of movement of the roller in the radial direction can be restricted.