JP2007263279A - Retainer of rolling bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retainer of a rolling bearing that can favorably prevent deformation toward an outside diameter direction caused by a centrifugal force by forming the retainer of the rolling bearing by combining resin-made retainer bodies and a metal ring, and can rigidly connect and hold the retainer bodies and the metal ring. <P>SOLUTION: The retainer 40 of the rolling bearing comprises: the resin-made first retainer body 41 that is assembled from one side between an inner ring 10 and outer ring 20; the resin-made second retainer body 45 that is assembled from the other side; and the metal ring 51 that is arranged along the outside of at least one retainer body out of the first and the second retainer bodies 41, 45. Both the first and the second retainer bodies 41, 45, and the metal ring 51 are integrally connected by a rivet 60 penetrating over columns 43, 47 arranged between pockets 42, 46 of both the first and the second retainer bodies 41, 45 and opposite to each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cage used for rolling bearings such as deep groove ball bearings and cylindrical roller bearings.

In a rolling bearing, for example, a deep groove ball bearing, when the cage is made of a synthetic resin and has a single-sided crown shape, it is easily deformed in the outer diameter direction by centrifugal force during rotation. Further, when the cage is deformed in the outer diameter direction by centrifugal force, the rolling of the balls becomes worse.
For this reason, for example, a synthetic resin cage disclosed in Patent Document 1 (Japanese Utility Model Laid-Open No. 6-1848) is known.
In this case, a connecting leg is formed on a pillar portion provided between adjacent pockets of the cage body, while an engaging shaft portion is provided on an annular lid body, and the engaging shaft portion is provided at the tip end portion of the connecting leg. The annular lid is connected by being elastically engaged or press-fitted.
Japanese Utility Model Publication No. 6-1848

By the way, in the synthetic resin-made cage disclosed in Patent Document 1, the engagement shaft portion of the annular lid is elastically engaged with or pressed into the distal end portion of the connecting leg of the cage body. For example, if the engagement force between the coupling leg and the engagement shaft portion is increased to prevent the engagement shaft portion from being accidentally pulled out, the workability of the connection between the cage body and the annular lid body is improved. Becomes worse.
On the other hand, if the engagement force between the connecting leg and the engagement shaft is reduced in consideration of the connection workability between the cage body and the annular lid, there is a problem that the engagement shaft is unexpectedly pulled out. To do.

  In view of the above-mentioned problems, the object of the present invention is that the rolling bearing retainer is composed of a combination of a synthetic resin retainer body and a metal ring, so that deformation in the outer diameter direction due to centrifugal force is good. It is possible to provide a cage for a rolling bearing capable of preventing the above-mentioned problem and capable of firmly connecting and holding the cage body and the metal ring.

To achieve the above object, a rolling bearing cage according to claim 1 of the present invention is a rolling bearing cage for holding a plurality of rolling elements between an inner ring and an outer ring.
The cage includes a synthetic resin first cage body assembled from one side between the inner ring and the outer ring, a synthetic resin second cage body assembled from the other side, and the first A metal ring disposed along the outer side of at least one of the first and second cage bodies;
The first and second cage main bodies and the metal ring are integrated by rivets that are provided between the respective pockets of the first and second cage main bodies and are inserted through opposite column portions. It is connected in the shape.

According to the above-described configuration, the holding force of the rolling element can be increased by holding the rolling element by both pockets by the mutual pockets of the first and second cage bodies, and the first and second holdings are both held. It becomes a structure which has the core by a rivet in the pillar part of a container main body, and rigidity can be improved favorably by metal rings and rivets. For this reason, the deformation | transformation to the outer-diameter direction by a centrifugal force can be prevented favorably.
Furthermore, both the first and second cage main bodies and the metal ring can be firmly and securely connected and held by the rivets, and the durability is excellent.

A rolling bearing cage according to claim 2 is the rolling bearing cage according to claim 1,
Metal rings are respectively arranged along the outer portions of both the first and second cage bodies,
The first and second cage bodies are sandwiched between the metal rings.

  According to the said structure, rigidity can be improved much more by pinching both the 1st and 2nd holder body with both metal rings, and it is effective in preventing the deformation | transformation to the outer-diameter direction by centrifugal force. Is big.

A rolling bearing cage according to claim 3 is a rolling bearing cage for holding a plurality of rolling elements between an inner ring and an outer ring,
The cage includes a cage body made of synthetic resin assembled from one side between the inner ring and the outer ring, and a metal ring assembled from the other side,
In the pillar portion provided between the pockets of the cage body, a connecting body projects integrally toward the metal ring,
A shaft portion protrudes through the metal ring on the distal end surface of the connection body,
The distal end portion of the shaft portion is melted and crimped, and the cage body and the metal ring are integrally connected.

According to the said structure, since rigidity can be improved with metal rings, the deformation | transformation to the outer-diameter direction by a centrifugal force can be prevented favorably.
In addition, the tip of the shaft on the tip of the connecting body projecting from the column of the synthetic resin cage main body penetrates the metal ring and is melted and crimped, so that the synthetic resin cage main body and Since the metal ring is firmly and securely connected and held, the rolling element can be stably held.

  Next, the best mode for carrying out the present invention will be described with reference to examples.

A first embodiment of the present invention will be described with reference to FIGS.
1 is a partially broken perspective view showing a deep groove ball bearing as a rolling bearing according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view showing a state in which the rolling elements are held in the pockets of the cage. FIG. 3 is a longitudinal sectional view showing a state in which the first and second cage bodies of the cage are sandwiched between the first and second metal rings and connected by rivets.
As shown in FIGS. 1 to 3, a deep groove ball bearing as a rolling bearing includes an inner ring 10 in which a raceway surface 11 having a circular arc cross section is formed on the outer peripheral surface, and a raceway surface 21 having a circular arc cross section on the inner peripheral surface. Is formed in an annular shape, a plurality of balls 30 as rolling elements disposed between the raceway surfaces 11 and 21 of the inner and outer rings 10 and 20, and a holding for holding the plurality of balls 30 And a container 40.

As shown in FIGS. 1 and 2, the retainer 40 includes first and second retainer bodies 41 and 45 made of synthetic resin, and first and second sandwiching the retainer bodies 41 and 45 from the outside. Second metal rings 51 and 55 are provided.
As shown in FIGS. 2 and 3, both the first and second cage bodies 41 and 45 have pockets 42 and 46 corresponding to a plurality of balls 30 and column portions 43 and 47 in the circumferential direction. The first cage body 41 is assembled from one side between the inner ring 10 and the outer ring 20, and the second cage body 45 is assembled from the other side between the inner ring 10 and the outer ring 20. It has come to be.
Further, in the first embodiment, as shown in FIG. 1, the pocket 42 of the first retainer body 41 is deeply formed beyond the center of the ball 30 by a predetermined amount. The 45 pockets 46 are formed shallow.

First and second metal rings 51 and 55 made of a steel plate ring or the like are disposed on the outer sides of the first and second cage bodies 41 and 45. Both the first and second rings The metal rings 51 and 55 and the first and second cage main bodies 41 and 45 are integrally connected by a metal rivet 60 inserted through the portions of the column portions 43 and 47.
The first and second cage bodies 41 and 45 are sandwiched between the first and second metal rings 51 and 55.
That is, as shown in FIG. 3, the shaft portion 62 of the rivet 60 having the head 61 at one end is the first metal ring 51, the column portion 43 of the first cage body 41, and the second cage body 45. After being sequentially inserted into the column part 47 and the second metal ring 55, the tip end of the shaft part 62 is crimped to form the crimp part 63, thereby forming both the first and second metal rings 51. , 55 are connected by a rivet 60 in a state where both the first and second cage main bodies 41, 45 are sandwiched between the first and second cage main bodies 41, 45, whereby the cage 40 is configured.

In the deep groove ball bearing retainer 40 as the rolling bearing according to the first embodiment configured as described above, as shown in FIG. 2, the pockets of the first and second retainer bodies 41 and 45 are mutually pocketed. Since the ball 30 can be held by both holdings by means of 42 and 46, the holding force of the ball 30 can be increased as compared with a single holding type holder.
Further, as shown in FIG. 3, the first and second retainer bodies 41 and 45 have a structure having a core formed by the shaft portion 62 of the metal rivet 60 on the mutual column portions 43 and 47. For this reason, rigidity can be favorably improved by the first and second metal rings 51 and 55 and the rivet 60. As a result, it is possible to satisfactorily prevent deformation in the outer diameter direction due to centrifugal force.
Furthermore, both the first and second metal rings 51 and 55 and the first and second cage bodies 41 and 45 can be firmly and securely connected and held by the rivet 60, and the outer diameter due to centrifugal force can be increased. Effective in preventing deformation in the direction, and excellent durability.

  Further, a coating layer made of a material having a low coefficient of friction (for example, Teflon (registered trademark) resin material) is provided on the surfaces of the first and second cage bodies 41, 45 that contact the balls 30 in the mutual pockets 42, 46. By providing it, it becomes possible to constitute a deep groove ball bearing with low torque.

Next, a second embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a perspective view showing a state in which a cage body made of a synthetic resin and a metal ring constituting a cage used in a deep groove ball bearing as a rolling bearing according to Embodiment 2 of the present invention are separated from each other. It is. FIG. 5 is a cross-sectional view showing a state in which the cage body and the metal ring are connected.
As shown in FIGS. 4 and 5, the second embodiment exemplifies the case of a one-sided type retainer 140, and the retainer 140 is made of a synthetic resin and has a crown-shaped retainer body 141. And a metal ring 151 such as a steel plate.
That is, the cage body 141 includes pockets 142 for individually holding a plurality of balls 30 and column portions 143 provided between the adjacent pockets 142. Further, a rectangular shaft-like connecting body 145 is integrally projected toward the metal ring 151. Further, a shaft portion 146 penetrating through the through hole 152 of the metal ring 151 protrudes from the distal end surface of each connecting body 145. As shown in FIG. 5, the cage main body 141 and the metal ring 151 are integrally connected by melting and caulking the tip end portion of the shaft portion 146 to form the caulking portion 147.
Since the other structure of this Example 2 is comprised similarly to Example 1, the same code | symbol is attached | subjected with respect to the same component, and the description is abbreviate | omitted.

In the deep groove ball bearing retainer 140 according to the second embodiment configured as described above, since the rigidity of the retainer 140 can be increased by the metal ring 151, deformation in the outer diameter direction due to centrifugal force is good. Can be prevented.
Further, the distal end portion of the shaft portion 146 on the distal end surface of the coupling body 145 projecting from the column portion 143 of the cage main body 141 is passed through the through hole 152 of the metal ring 151, and the caulking portion 147 is formed by melting caulking. Thus, the cage main body 141 and the metal ring 151 can be firmly and securely connected and held, and the ball 30 can be stably held.

The present invention is not limited to the first and second embodiments.
For example, in the first embodiment, both the first and second cage main bodies 41 and 45 made of synthetic resin and the first and second both metal bodies sandwiched from the outside of the both cage main bodies 41 and 45 are used. Although the case where the retainer 40 is configured to include the rings 51 and 55 is illustrated, it is made of metal along the outer portion of one of the first and second retainer bodies 41 and 45. The present invention can be implemented even if a ring is arranged and fixed by the rivet 60.
Moreover, in the said Example 1 and 2, although the case where the rolling bearing was a deep groove ball bearing was illustrated, it is possible to employ | adopt the holder | retainer of this invention also when it is a cylindrical roller bearing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing a deep groove ball bearing as a rolling bearing according to Embodiment 1 of the present invention. It is a longitudinal section showing the state where the ball was similarly held in the pocket of the cage. Similarly, it is a longitudinal sectional view showing a state in which both the first and second cage main bodies of the cage are sandwiched between the first and second metal rings and connected by rivets. It is a perspective view which fractures | ruptures and shows the state from which the synthetic resin cage main body and metal ring which comprise the cage used for the deep groove ball bearing as a rolling bearing which concerns on Example 2 of this invention were isolate | separated. It is sectional drawing which similarly shows the state with which the holder main body and metal rings were connected.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Inner ring 11 Track surface 20 Outer ring 21 Track surface 30 Ball 40 Cage 41 Cage 41 First cage body 42 Pocket 43 Column 45 Second cage body 46 Pocket 47 Column 51 First metal ring 55 Second metal ring Metal ring 60 Rivet 140 Cage 141 Cage body 142 Pocket 143 Pillar part 145 Connection body 146 Shaft part 147 Caulking part 151 Metal ring

Claims (3)

A rolling bearing retainer for holding a plurality of rolling elements between an inner ring and an outer ring,
The cage includes a synthetic resin first cage body assembled from one side between the inner ring and the outer ring, a synthetic resin second cage body assembled from the other side, and the first A metal ring disposed along the outer side of at least one of the first and second cage bodies;
The first and second cage main bodies and the metal ring are integrated by rivets at the respective pillar portions provided between the adjacent pockets of the first and second cage main bodies. A cage for a rolling bearing, characterized by being connected in a shape. A rolling bearing retainer according to claim 1,
Metal rings are respectively arranged along the outer portions of both the first and second cage bodies,
A cage for a rolling bearing, wherein the first and second cage bodies are sandwiched between the metal rings. A rolling bearing retainer for holding a plurality of rolling elements between an inner ring and an outer ring,
The cage includes a cage body made of synthetic resin assembled from one side between the inner ring and the outer ring, and a metal ring assembled from the other side,
In the pillar portion provided between the adjacent pockets of the cage body, a connecting body projects integrally toward the metal ring,
A shaft portion protrudes through the metal ring on the distal end surface of the connection body,
A rolling bearing retainer, wherein a tip end portion of the shaft portion is melted and crimped, and the retainer body and the metal ring are integrally connected.

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