JP2001289250A - Roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller bearing having a cage capable of preventing the initial abnormal abrasion at low cost. SOLUTION: The cage 10 of this roller bearing comprises a first annular part 20 and a second annular part 25 respectively along both end faces 18a and 18b of each roller 18, and plural pole parts 30 extended between the first annular part 20 and the second annular part 25 along a generating line 19 of each roller 18, for holding a number of rollers 18 mounted between an outer ring 11 and an inner ring 15 on equally spaced positions, the first annular part 20 and each pole part 30 are integrally molded, a cut part 31 is formed on a corner part at an inner ring 15 side of each pole part 30, and the second annular part 25 is engaged with the cut part 31 without kept into contact with the outer ring 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller bearing, and more particularly to a roller bearing having a retainer for retaining a plurality of rollers between an outer ring and an inner ring.

[0002]

2. Description of the Related Art Conventionally, a cylindrical roller bearing has a retainer for holding a plurality of cylindrical rollers disposed between an outer ring and an inner ring. This retainer is disclosed in, for example, JP-A-8-9-9.
It is proposed in Japanese Patent Publication No. 3772, "Coiled cage for cylindrical roller bearing". Hereinafter, the cylindrical roller bearing cage will be described with reference to FIGS. 6 and 7.

As shown in FIG. 6, a retainer for a cylindrical roller bearing is provided.
Reference numeral 70 denotes a plurality of pillars 72 projecting from the first annular portion 71 at regular intervals, and the second annular portion 75 is brought into contact with an end portion 73 of the pillar portion 72. Insertion hole 76 of column 72 and insertion hole 74 of column 72
Rivets 80 (shown in FIG. 7) are inserted into these insertion holes 74 and 76, and the rivets 80 are swaged to be integrally joined. This retainer 70 is disposed between the outer ring 82 and the inner ring 83 of the cylindrical roller bearing (shown in FIG. 7),
The cylindrical rollers 85 disposed between the pillars 72 are kept at a constant interval.

[0004]

This cylindrical roller bearing has the following features.
For example, when the inner ring 83 rotates with the outer ring 82 fixed,
The cylindrical roller 85 revolves in the same direction as the inner ring 83. For this reason, the retainer 70 also rotates in the same direction as the inner ring 83 together with the cylindrical rollers 85,
At this time, the outer peripheral surface 71a of the first annular portion 71 and the second annular portion
The outer peripheral surface 75 a of the outer ring 82 contacts the inner peripheral surface 82 a of the outer ring 82.

Therefore, unless the outer peripheral surface 71a of the first annular portion 71 and the outer peripheral surface 75a of the second annular portion 75 are assembled so as to be flush with each other, the outer peripheral surfaces 71a and 75a are Since the inner peripheral surface 82a does not evenly contact the inner peripheral surface 82a, it is conceivable that abnormal wear occurs early and hinders the bearing function.

Therefore, in order to prevent the outer peripheral surfaces 71a and 75a from being abnormally worn out at an early stage, a convex portion is formed on the end portion 73 of the pillar portion 72.
By forming a concave portion 75b in the second annular portion 75 and positioning and engaging the convex portion 73a with the concave portion 75b, the outer peripheral surface 71a of the first annular portion 71 and the second annular portion 75 are formed. Is made to be flush with the outer peripheral surface 75a. However, in order to positionally engage the convex portion 73a with the concave portion 75b, it is necessary to form the convex portion 73a and the concave portion 75b with high precision, and the processing is troublesome. For this reason, there is a problem that it is difficult to reduce the cost of the cylindrical roller bearing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a roller bearing having a cage capable of preventing abnormal early wear and reducing costs. is there.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a method for holding an outer ring, an inner ring, and a plurality of rollers disposed between the outer ring and the inner ring. First annular portion and second annular portion respectively along both end surfaces of
An annular portion, and a plurality of pillar portions extending along the generatrix of each roller and extending between the first annular portion and the second annular portion, wherein the first annular portion and each pillar portion are A roller bearing having a retainer formed integrally therewith, having a notch provided in the inner ring side corner of each of the pillars of the retainer, wherein the second annular portion is provided in the outer ring. It is characterized in that it is engaged with the notch so as not to come into contact with it.

Here, the outer ring is a bearing ring fitted to a housing or the like, and the inner ring is a bearing ring fitted to a shaft or the like. The rollers are rolling elements having one central axis.
Further, the pillar portion is a stay connecting the first annular portion and the second annular portion.

In the roller bearing configured as described above, since the second annular portion is attached to the notch of each column of the cage, the outer periphery of the second annular portion is located inside the first annular portion. In position, only the first annular portion and the column portion contact the outer ring. Since the first annular portion and the column portion are integrally formed members, the accuracy of the outer peripheral surface can be relatively easily increased. On the other hand, since the second annular portion does not contact the outer ring, there is no need to attach the second annular portion to the first annular portion with high accuracy. Therefore, early abnormal wear can be prevented and the cost can be reduced.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 and 2, the cage 10 of the roller bearing according to the first embodiment includes a plurality of rollers (cylindrical rollers) 18 disposed between the outer ring 11 and the inner ring 15 in an equal position. Both end faces 18 of each cylindrical roller 18
a first annular portion 20 and a second annular portion respectively along a, 18b
25, along the bus 19 of each cylindrical roller 18 and the first annular portion
20 and a plurality of pillars 30 bridged between the second annular part 25, the first annular part 20 and each pillar 30 are integrally formed,
Each column 30 has a notch 31 provided at a corner on the inner ring 15 side, and is engaged with the notch 31 so that the second annular portion 25 does not contact the outer ring 11.

The outer race 11 of the roller bearing has an outer raceway 12 on which a cylindrical roller 18 rolls, and has flanges 13 on both sides of the outer raceway 12. For example, an outer peripheral surface 14 is mounted on a housing (not shown). Mated. The inner ring 15 is arranged coaxially inside the outer ring 11, and has cylindrical rollers 18 arranged along an inner ring track 16, for example, an inner peripheral surface 17.
To a shaft (not shown).

The first annular portion 20 is a guide member which is formed in a ring shape which can be disposed between the outer ring 11 and the inner ring 15 and has a ring height dimension H1 and a ring width dimension W. This first
A plurality of pillars 30 are formed integrally with the annular portion 20 along the inner surface 21. The space between the columns 30 is set to a space in which the cylindrical rollers 18 are rotatably arranged.

The outer surface 32 of the pillar portion 30 is formed on the outer peripheral surface of the first annular portion 20.
22 has a notch 31 for positioning the second annular portion 25 at a corner on the inner ring 15 side. Notch
31 is set to a height dimension H2 and a width dimension W. Notch
31 is formed on the inner surface 33 side of the pillar portion 30 (see also FIG. 1). For this reason, the second annular portion 25 arranged in the notch 31 is
30 can be located inside the outer surface 32. Insert hole 34 in notch 31
The insertion hole 34 is formed on the outer surface of the first annular portion 20.
23 (see FIG. 1).

The second annular portion 25 is formed in a ring shape so as to be disposed between the outer ring 11 and the inner ring 15, and has a ring height dimension H2 and a ring width dimension W. An insertion hole 26 is formed in the second annular portion 25 so as to correspond to the insertion hole 34 of the notch 31. In a state where the second annular portion 25 is arranged in the notch portion 31, the rivet 38 is inserted into these insertion holes 26 and 34 and the rivet 38 is swaged, so that the second annular portion 25 is formed as shown in FIG. It is integrally connected to the pillar 30. Then, the cylindrical roller 18 is housed between the pillar portions 30. As shown in FIG. 3, the outer surface 27 of the second annular portion 25 and the end surface 35 of the column portion 30 are flush, and as shown in FIG. 30
The inner surface 33 is set to be flush.

Here, the second annular portion 25 is riveted to the column portion 30.
When caulking at 38, it is conceivable that the second annular portion 25 slightly shifts with respect to the column portion 30, but it is assumed that the second annular portion 25 slightly shifts with respect to the column portion 30. Even the deviation is the cage
It does not affect the outer periphery of 10 (that is, the outer peripheral surface 22 of the first annular portion 20 and the outer surface 32 of the column 30). Therefore, the second
Since the annular portion 25 does not have to be assembled to the pillar portion 30 with higher precision than necessary, the cost of the retainer 10 can be reduced.

Further, since only the first annular portion 20 and the column portion 30 which are integrally formed members come into contact with the inner peripheral surface of the flange portion 13 of the outer ring 11, they come into contact with the inner peripheral surface of the flange portion 13 of the outer ring 11. The accuracy of the part can be increased relatively easily. Therefore, early abnormal wear can be prevented.

Further, as shown in FIG. 3, the second annular portion 25
By disposing the outer periphery 29 of the inside of the outer surface 32 of the column 30, a space S (a region shown by oblique lines) can be secured between the columns 30. Therefore, as shown in FIG. 1, a large space S1 is secured between the outer ring 11 and the second annular portion 25, and the space S1 can be used to easily fill the lubricant.

Hereinafter, a second embodiment will be described. In the embodiments described below, the members and the like already described in FIGS. 1 to 3 are denoted by the same reference numerals or corresponding reference numerals in the drawings to simplify or omit the description. As shown in FIGS. 4 and 5, the cage 40 of the roller bearing according to the second embodiment sets the height of the first annular portion 41 to be the same as the height H2 of the second annular portion 25. Thus, a gap S similar to that of the outer peripheral surface 29 of the second annular portion 25 is formed on the outer peripheral surface 42 of the first annular portion 41.

A space S is secured on the outer peripheral surface 42 of the first annular portion 41 and on the outer peripheral surface 29 of the second annular portion 25, and a space S1 is secured on both sides of the roller bearing as shown in FIG. It becomes possible to do. For this reason, the lubricant can be filled from the side where the work is easy to perform in accordance with the mounting state of the roller bearing. Also, since only the upper surface 46 of the column portion 45 contacts the inner peripheral surface of the flange portion 13 of the outer ring 11,
The accuracy of the portion of the outer ring 11 that contacts the inner peripheral surface 13 can be relatively easily increased. Therefore, early abnormal wear can be prevented.

The cage of the roller bearing according to the present invention is not limited to the above-described embodiments, but may be appropriately modified,
Improvements are possible, and the materials, shapes, dimensions, forms, numbers, locations, and the like of the first annular portion, the second annular portion, the column portions, and the like of the cage of the roller bearing illustrated in the above-described embodiments. Is arbitrary and not limited as long as the present invention can be achieved.

[0022]

As described above, according to the present invention, each column has a notch at the inner ring side corner, and the notch is formed so that the second annular portion does not contact the outer ring. Is engaged. For this reason, the outer periphery of the second annular portion is located inside the first annular portion, and only the first annular portion and the column contact the outer ring. Since the first annular portion and the column portion are integrally formed members, the accuracy of the outer peripheral surface can be relatively easily improved. On the other hand, since the second annular portion does not contact the outer ring, there is no need to attach the second annular portion to the first annular portion with high accuracy. Therefore, early abnormal wear can be prevented and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment according to the present invention.

FIG. 2 is an exploded perspective view of the first embodiment according to the present invention.

FIG. 3 is a perspective view of the first embodiment according to the present invention.

FIG. 4 is a perspective view of a second embodiment according to the present invention.

FIG. 5 is a sectional view of a second embodiment according to the present invention.

FIG. 6 is an exploded perspective view of a conventional roller shaft retainer.

FIG. 7 is a cross-sectional view of a conventional roller bearing retainer.

[Description of Signs] 10, 40 Cage 11 Outer ring 15 Inner ring 18 Rollers (cylindrical rollers) 18a, 18b Both ends of rollers 19 Rollers 20, 41 First annular section 25 Second annular section 30, 45 Column section 31 Notch

Claims (1)

[Claims] 1. A first annular portion and a second annular portion respectively along both end faces of each roller for holding an outer ring, an inner ring, and a number of rollers disposed between the outer ring and the inner ring. And a plurality of pillars extending along the generatrix of each roller and extending between the first annular portion and the second annular portion, wherein the first annular portion and each pillar are integrally formed. A roller bearing having a notch provided in the inner ring side corner of each of the pillars of the retainer, wherein the second annular portion is in contact with the outer ring. The roller bearing is engaged with the notch so as not to be disturbed.