JPH11315840A - Rolling bearing holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold a sealed grease over a long period without requiring the grease holding by a seal or shield by providing a radially protruding continuous or discontinuous protruding wall on either one of the outside surface and the inside surface or both the axial end parts. SOLUTION: A plurality of radially protruding discontinuous protruding walls 9... are provided on both axial end parts of an external surface 5 at prescribed intervals. The axial internal surface 11 of the protruding wall 9 is formed into a protruding round curved surface. The protruding wall 9 may be provided only on an internal surface 6 or on both the external surface 5 and the internal surface 6, and further may be provided circumferentially continuously. In a holder 4a according to this structure, the internal surfaces 11 of the protruding round inclined form of the protruding walls 9, 9... act to push back the grease laterally divided by a rolling body 3 into the bearing. Consequently, much grease can be held within the bearing in the state adhered to the holder 4a without using a seal or shield.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cage for a rolling bearing.

[0002]

2. Description of the Related Art Cages used for grease-lubricated rolling bearings include a steel plate cage formed by press molding, a resin cage formed by injection molding, and a metal cage formed by machining.

[0003]

In this type of rolling bearing using a retainer, the grease initially sealed is distributed little by little by the rolling of the rolling element 100 to the left and right.
In some cases, the oil is transferred to the outside of the bearing along the inner diameter surface (track surface) 201 of the bearing outer ring 200.

However, the conventional cage 300 itself is provided with such initially sealed grease on the bearing raceway surface 201.
No special shape is devised for holding the bearing inside the bearing, and the grease holding of these grease-lubricated bearings is performed by using a shield (or seal) 4 provided on the bearing.
00 or had to be done by a shield provided outside the bearing (see FIGS. 11 and 12). In the figure, reference numeral 301 denotes a pocket for holding the roller 100.

As a result, it is necessary to secure an axial dimension for mounting these bearing shields (or seals) 400 or an axial dimension for disposing a shield outside the bearing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a sealed grease for a long period of time without requiring grease holding by a seal or a shield. An object of the present invention is to provide a rolling bearing retainer that can be held and can extend the life of the bearing.

[0007]

In order to solve the above-mentioned problems, the technical means of the present invention is to provide a protruding member in one or both of the outer diameter surface and the inner diameter surface in the axial direction. That is, a continuous or discontinuous protruding wall is provided.

The protruding wall is within the scope of the present invention as long as it protrudes radially with an arbitrary width in the circumferential direction. In particular, the shape of the inner wall surface in the axial direction, the circumferential width, the axial width,
It is optional without being limited to the height in the radial direction, but the inner surface in the axial direction is inclined (a curved surface or a narrow inner top surface parallel to the outer surface is inclined in the outer surface direction from each end of the narrow inner top surface, respectively). (The inner inclined surface, etc.) is effective for guiding the grease to move to the outside to the inside of the bearing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment, and FIGS.
5 and 6 show the third embodiment, FIGS. 7 and 8 show the fourth embodiment, and FIGS. 9 and 10 show the rolling bearings provided with the retainer of the fourth embodiment shown in FIG. FIG.

FIGS. 1 to 6 show an embodiment in which the cage of the present invention is applied to a cylindrical roller bearing (first to third embodiments). FIGS. 7 and 8 show a cage of the present invention for a ball bearing. Is shown (fourth embodiment). In the figure, 1 outer ring, 2
Denotes an inner ring, 3 denotes a rolling element, 4a, 4b, 4c, 4d denotes a retainer.

The retainer 4a is provided with a plurality of pockets 7 at predetermined intervals via pillars 8 and at both axial ends of the outer diameter surface 5 a non-continuous projecting member protruding in the radial direction. A plurality of projecting walls 9 are provided at predetermined intervals.
Is formed in a convex R shape (curved surface) (first embodiment).

The projecting walls 9 are provided at opposite ends of each column portion 8 on the outer diameter surface 5. However, the projecting positions of the projecting walls 9 are within the scope of the present invention. The setting is not limited to the position shown in FIG. Further, the curvature of the convex R-shaped (curved surface) of the axial inner surface 11 of the protruding wall 9 or the protruding height of the protruding wall 9 itself is not particularly limited.

In this embodiment, the projecting wall 9 is formed only on the outer diameter surface 5.
Although the description has been made with reference to the case where the inner diameter surface 6 is provided, it may be provided only on the inner diameter surface 6, or may be provided on both the outer diameter surface 5 and the inner diameter surface 6.

Although the above description has been made on the case where the projecting wall 9 is discontinuous in the circumferential direction, the projecting wall 9 may be provided so as to project continuously in the circumferential direction, and can be appropriately changed within the scope of the present invention.

The retainer to which the present invention can be applied is not limited at all, for example, a resin retainer formed by injection molding and a metal retainer formed by machining.

Therefore, the grease distributed to the left and right by the rolling elements (rollers) 3 is formed on the inner surfaces of the projecting walls 9, 9... 11, the grease is pushed back inside the bearing, and the sorting and pushing back are repeated, so that a large amount of grease is finally held inside the bearing with the grease adhered to the retainer 4a.

FIGS. 3 and 4 show a second embodiment of the retainer of the present invention. The retainer 4b shown in the present embodiment relates to the inclined state of the axially inner side surface 11 of the projecting wall 9 in the first embodiment. This is merely an illustration of another embodiment, and the configuration other than the inner surface shape and the operation and effect of this embodiment are the same as those of the first embodiment. .

The axial inner surface 11 of the protruding wall 9 according to the present embodiment.
More specifically, the inner side surface 11 in the axial direction has an inner top surface 12 formed narrower than the outer side surface 10 and is provided substantially parallel to the outer side surface 10. Inner inclined surfaces 13 inclined from both ends toward the outer surface 10 respectively
Is provided.

The width of the inner top surface 12 and the inner inclined surface 13
Is not limited to the illustrated example and can be changed within the scope of the present invention.

FIGS. 5 and 6 show a third embodiment of the retainer of the present invention. The retainer 4c shown in this embodiment is just another example of the shape of the projecting wall in the first embodiment. However, since the basic configuration of the retainer other than the shape of the protruding wall is the same as that of the first embodiment, the same reference numerals are given to the same portions and the description thereof will be omitted.

In the retainer 4c of the present embodiment, annular projecting walls (overhangs) 14 that are circumferentially continuous are provided at both ends in the axial direction of the outer diameter surface 5 so as to project in the radial direction, and are provided at predetermined intervals in the circumferential direction. The inclined surface 16 was formed so that the inner surface 15 in the axial direction was discontinuous.

The inclined surface 16 on the inner side surface 15 in the axial direction is
Convex R at opposite ends of each column 8 at the outer diameter surface 5
The convex R-shaped inclined surface 16 is not limited to the position shown in the present embodiment, but can be arbitrarily set and changed within the scope of the present invention. Yes, and in this embodiment is provided discontinuously,
It is also within the scope of the present invention to provide the convex R-shaped inclined surface 16 continuously.

Further, the curvature of the convex R-shaped inclined surface (curved surface) 16 of the inner surface 15 in the axial direction or the axial width of the convex R-shaped inclined surface 16 is not particularly limited.

The inclined surface 16 on the axial inner surface 15
May be formed into an inclined surface shape as shown in FIG. 3 and FIG. 4, which is within the scope of the present invention.

In the present embodiment, the case where the annular projecting wall 14 is provided only on the outer diameter surface 5 has been described.
May be provided only on the outer diameter surface 5 and the inner diameter surface 6.

FIGS. 7 and 8 show a fourth embodiment of the cage of the present invention. This embodiment is an embodiment in which the present invention is applied to a resin crown type cage 4d.

As in the first embodiment, the retainer 4d of the present embodiment is configured such that the protruding wall 9 whose axial inner surface 11 is inclined (curved) is formed at one axial end of the outer diameter surface 5, ie, one end. 17
And protruding from the end of the outer diameter surface 5 on the opposite side.

Therefore, by using the ball bearing provided with the crown-shaped cage 4d of the present embodiment, the single shield (or the seal) having the shield (or seal) 18 only on the side opposite to the projection wall 9 in the axial direction is provided. (Single seal) ball bearing.

As described above, in the application to the crown-shaped resin cage by injection molding used for the deep groove ball bearing, the present invention is applied to one end in the axial direction on the side forming the ring of the cage as described above. By providing the protruding wall 9 by the above, it is possible to omit the arrangement of the shield (or seal) 18 on the corresponding bearing side surface and to reduce the overall width of the bearing.

In the present embodiment, one embodiment of the protruding wall 9 has been described with the inclined (curved) axial inner side surface 11 shown in the first embodiment, but the inclined axial direction shown in the second embodiment has been described. The inner side surface 11 may be used, and an annular projecting wall (projection) 14 which is continuous in the circumferential direction shown in the third embodiment is protruded in the radial direction, and the axial inner side surface 15 is not provided at predetermined intervals in the circumferential direction. A continuous inclined surface (curved) 16 may be formed, which is within the scope of the present invention.

FIG. 9 shows a motor 19 in which two rolling bearings (deep groove ball bearings) of the embodiment shown in FIG. 7 are arranged with their shields (or seals) 18 outside each other. FIG. 10 shows a specific form of use, showing a combination of one rolling bearing of the embodiment also shown in FIG. 7 and a slide bearing 20 disposed on the side opposite to the shield (or seal) 18 of the bearing. This is an example of a specific use of the present embodiment in which the motor 19 is constructed. Incidentally, 21 in the figure
Denotes a rotor, 22 denotes a stator, and 23 denotes a chassis.

Therefore, by applying a rolling bearing having a small width without the one-side shield as described above (see FIGS. 7 to 10), a motor having a low height can be provided.

[0033]

According to the present invention, grease which has the above-described structure and is intended to move to the outside of the bearing by rotation of the cage is provided on one or both of the outer diameter surface and the inner diameter surface of the cage. Since the protruding wall has the effect of pushing back inside the bearing, the grease initially sealed is retained inside the bearing for a long time and contributes to lubrication without extending the life of the bearing without the need to retain grease with a seal or shield. Can be expected.

Therefore, by using the cage for a rolling bearing of the present invention, it is not necessary to maintain the grease by the shield or the seal as described above, so that the axial dimension for mounting the bearing shield (or the seal) is not required. Also, it is not necessary to secure the axial dimension for arranging the shield outside the bearing.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a rolling bearing cage of the present invention.

FIG. 2 is a partially omitted perspective view showing the retainer of the first embodiment in an enlarged manner.

FIG. 3 is a longitudinal sectional view showing a second embodiment.

FIG. 4 is a partially omitted perspective view showing an enlarged view of a retainer according to a second embodiment.

FIG. 5 is a longitudinal sectional view showing a third embodiment.

FIG. 6 is a partially omitted perspective view showing an enlarged view of a retainer according to a third embodiment.

FIG. 7 is a longitudinal sectional view showing a fourth embodiment.

FIG. 8 is a partially omitted perspective view showing an enlarged view of a retainer according to a fourth embodiment.

FIG. 9 is a cross-sectional view showing a specific usage form of a rolling bearing provided with the cage of the present invention.

FIG. 10 is a cross-sectional view showing a specific use form of a rolling bearing provided with the cage of the present invention.

FIG. 11 is a longitudinal sectional view of a rolling bearing provided with a conventional cage.

FIG. 12 is a longitudinal sectional view of a conventional cage for a rolling bearing.

[Explanation of symbols]

 4a, 4b, 4c, 4d: cage 5: outer diameter surface 6: inner diameter surface 9: protruding wall 11: axial inner surface

Claims (1)

[Claims] 1. A rolling bearing having a continuous or discontinuous projecting wall projecting in a radial direction at one or both axial ends of an outer diameter surface and an inner diameter surface. Retainer.