JP2000074071A - Cage and roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cage and a roller on which a clearance between adjacent rollers is not restricted due to structure of a holder. SOLUTION: A holder 23 on a cage and a roller 21 is divided into an outer peripheral side holer 30 having an outside support 31 to prevent falling of the roller by inserting it between itself and a roller 22 on the outside of a pitch circle 25 of a roller row and an inside peripheral side holder 40 having an inside support 41 to prevent falling of the roller 22 inward in the bearing radial direction by inserting it between itself and the roller 22 on the inside of the pitch circle 25 of the roller row, and the outer peripheral side holder 30 and the inner peripheral side holder 40 are engaged and integrated through an lock means 33a of a flange part 33 to cover an end part of the roller row.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined bearing comprising a plurality of rollers and a cage for positioning and holding these rollers at predetermined intervals on a predetermined pitch circle without using inner and outer rings. It concerns a certain cage and roller.

[0002]

2. Description of the Related Art As a bearing for an industrial machine under heavy load such as a construction machine, a plurality of rollers and holding these rollers at predetermined intervals on a predetermined pitch circle without using inner and outer rings. A cage-and-roller, which is a combination bearing composed of a container and a container, has been developed.

FIGS. 10 and 11 show a conventional cage and roller. This cage and roller 1
Is composed of a plurality of rollers (rollers) 2 and a cage 4 for positioning and holding the rollers 2 on a predetermined pitch circle 3. The retainer 4 is formed by integrally forming a pair of ring-shaped flange portions 6 and 6 that cover the end portions of the roller row and a column portion 8 that connects the pair of flange portions 6 and 6 to each other. .

[0004] The strut portion 8 has a pair of outer struts 10 and 10 continuous with the outer periphery of the pair of flange portions 6 and 6, and extends diagonally from the distal end portions of these outer struts 10 inward in the radial direction of the bearing. The pair of connecting portions 12, 12 protruded from each other and the inner strut 14 connecting the ends of the pair of connecting portions 12, 12 are integrated with each other, and are provided at predetermined intervals on the outer periphery of the pair of flange portions 6, 6. ing.

[0005] The outer column 10 of the column portion 8 is inserted between the adjacent rollers 2 along the axial direction of the rollers at a position closer to the outside than the pitch circle 3 of the roller row, and is moved outward in the radial direction of the bearing. Prevent the roller 2 from falling off. The inner support 14 of the support portion 8 is inserted between the adjacent rollers 2 along the axial direction of the rollers at a position closer to the inner side than the pitch circle 3, and the rollers 2 are inserted inward in the radial direction of the bearing. To prevent falling off. As shown, the retainer 4 includes an outer support 10 and an inner support 14.
The cross-sectional shape is substantially M-shaped because of the support portion 8 which integrates the above and is referred to as an M-shape.

[0006]

However, in the cage and roller 1 described above, since the retainer 4 has an integral structure and the connecting portion 12 of the support portion 8 crosses over the pitch circle 3, it is connected between adjacent rollers. The space occupied by the part 12 must be left. Therefore, when the interval between adjacent rollers is reduced in order to increase the load capacity by increasing the number of rollers, there is a problem that the interval between adjacent rollers is limited by the connecting portion 12, and it is difficult to increase the number of rollers. Was.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problem, and the distance between adjacent rollers is not limited due to the structure of the retainer. An object of the present invention is to provide a cage and roller in which it is easy to increase the load capacity by increasing the number of rollers.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a plurality of rollers and a cage for positioning and holding these rollers at predetermined intervals on a predetermined pitch circle without using inner and outer rings. In a cage and roller that is a combined bearing, the cage is inserted radially outward of the bearing by inserting the cage along the axial direction of the roller between adjacent rollers at a position closer to the outside than the pitch circle of the roller row. In the axial direction of the rollers, the outer circumferential side retainer, in which outer pillars that prevent the rollers from falling off, are arranged in a ring at predetermined intervals, and the adjacent rollers at positions closer to the inside than the pitch circle of the roller rows, An inner support that is inserted along the inner support to prevent the rollers from dropping inward in the radial direction and that is arranged in a ring at predetermined intervals, and the outer support or the inner support. One of the peripheral cages is A ring-shaped flange portion covering the end of the roller row is continuously provided at both ends of the column inserted between the adjacent rollers, the cross-sectional shape is configured in a gate shape, and the other retainer is This is achieved by a cage-and-roller characterized in that an engagement portion integrated with one of the retainers is provided by engagement with a locking means formed on the flange portion.

According to the above construction, the retainer is divided into an outer peripheral retainer having an outer support and an inner peripheral retainer having an inner support, and these outer and inner retainers are provided. The two members are integrally engaged with each other by a locking means of a flange portion provided on one of the retainers so as to cover the end portions of the roller rows, and there is no member crossing the pitch circle of the roller rows in the retainers. Therefore, it is not necessary to leave an occupied space for the components of the cage between the adjacent rollers, and the interval between the adjacent rollers can be reduced to the limit.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cage and roller according to the present invention. 1 to 8 show a first embodiment of a cage and roller according to the present invention. FIG. 1 is a cross-sectional view of the cage and roller according to the first embodiment, and FIG. FIG. 3 is an exploded perspective view of the cage and roller according to the first embodiment of the present invention, FIG. 4 is a cross-sectional view of an outer circumferential side retainer of the cage and roller according to the first embodiment of the present invention, and FIG. FIG. 6 is a cross-sectional view taken along the line CC of FIG. 4, FIG. 6 is a side view of the inner peripheral side retainer of the cage and roller according to the first embodiment of the present invention, FIG. FIG. 7 is a sectional view taken along line EE in FIG. 6.

The cage and roller 2 of the first embodiment
Reference numeral 1 denotes a combination bearing including a plurality of rollers 22 and a cage 23 for positioning and holding these rollers 22 on a predetermined pitch circle at predetermined intervals without using inner and outer rings. However, as shown in FIG.
It is divided into an outer peripheral side retainer 30 and a pair of inner peripheral side retainers 40. As shown in FIG. 2 to FIG. 4, the outer peripheral side retainer 30 is inserted between the adjacent rollers 22 along the axial direction of the rollers at a position closer to the outer side than the pitch circle 25 of the roller row, and the radius of the bearing. A plurality of outer pillars 31 for preventing the rollers 22 from dropping outward in the direction are arranged in a ring shape at predetermined intervals and connected.

As shown in FIGS. 2 and 3, the inner peripheral side retainer 40 is inserted between adjacent rollers 22 at a position closer to the inner side than the pitch circle 25 of the roller rows along the axial direction of the rollers. A plurality of inner struts 41 for preventing the rollers 22 from dropping inward in the radial direction of the bearing are arranged and connected in a ring shape at predetermined intervals.

Outer struts 31 in each of the retainers 30, 40
The inner support 41 functions as an opening edge of a retainer pocket that stores and holds the rollers 22.

In the case of this embodiment, FIGS.
As shown in the figure, the outer peripheral side retainer 30 is provided with ring-shaped flange portions 33, 33 covering end portions of a row of rollers at both ends of an outer column 31 inserted between the adjacent rollers 22. The cross-sectional shape is a gate shape.

Also, as shown in FIG.
Is provided with a protrusion 31a, and a portion provided with the protrusion 31a has a maximum width. The distance C1 between the adjacent outer columns 31 measured at the portion having the maximum width is set smaller than the outer diameter D of the roller 22. Further, the distance C2 between the adjacent outer supports 31 in a range deviating from the protrusion 31a.
Is set larger than the interval C1 between the projections 31a, and the flow of the lubricating oil is good. With such a configuration,
The rollers 22 are caught by the projections 31a of the outer pillars 31 to prevent the rollers 22 from dropping outward (roller burrs) in the radial direction.

Further, as shown in FIG. 5, a chamfer 31b is formed at a corner on the inner peripheral surface side of the projection 31a of the outer column 31 with which the roller 22 comes into contact. Further, a pair of flange portions 3
As shown in FIG. 4, the inner peripheral side
Is provided with a locking means 33a for locking. In the case of the present embodiment, the locking means 33 a is a groove having a semicircular cross section and is formed over the entire inner peripheral surface of the flange portion 33.

As shown in FIGS. 6 and 7, the inner peripheral side retainer 40 has an annular ring 43 fitted on the inner periphery of the flange portion 33.
On the side of the structure, a plurality of inner pillars 41 are projected,
In the case of the present embodiment, it is an integrally molded product made of a resin material. As shown in FIG. 2, in the inner circumferential side retainer 40, by setting the interval C3 between the adjacent inner supports 41 to be smaller than the outer diameter D of the roller 22, the roller 22 inward in the radial direction of the bearing is set. Prevention of dropping (roller ball).

On the outer peripheral surface of the ring 43 fitted on the inner periphery of the flange portion 33, the outer peripheral side retainer 30 and the inner peripheral side retainer 40 are engaged with the groove as the locking means 33a. Are integrated and intermittently provided at six locations in the circumferential direction. As shown in FIG. 8, the engaging portion 43a is a ridge having a semicircular cross-sectional shape corresponding to the groove as the locking means 33a.

The cage 23 in the cage and roller 21 is constituted by an outer side cage 30 having an outer column 31.
And a pair of inner peripheral side retainers 40 having an inner support 41, and these retainers 30, 40 are mutually separated.
A structure in which the engaging means 33a of the flange portion 33 provided on the outer peripheral side retainer 30 is provided so as to cover the end portion of the roller row and is integrated with the retainer 23. do not do. Therefore, there is no need to leave a space occupied by the retainer 23 between the adjacent rollers 22, and the interval between the adjacent rollers 22 can be reduced to the limit. That is, the distance between the adjacent rollers 22 is not limited by the structure of the retainer 23, and the load capacity can be increased by reducing the distance between the adjacent rollers 22 and increasing the number of rollers to be held. Can be easily done.

The cage and roller 2 according to the present invention
In 1, the material of the retainer 23 is not limited to the resin material shown in the above embodiment, and a metal plate such as a steel strip can be used. FIG. 9 is a cross-sectional view of another embodiment of the inner peripheral side retainer 40 used for the cage and roller 21 of the present invention. Inner circumference side retainer 5 of this embodiment
Numeral 0 is formed by press-forming a steel strip. The configuration other than the material is the same as that of the first embodiment, and the same functional parts are denoted by the same reference numerals as those of the first embodiment. Is omitted. The ridge as the engagement portion 43a may be provided at the time of molding, or may be provided by caulking at the time of engagement with the outer peripheral side retainer 30.

In the above embodiment, the locking means 33a formed on the flange portion 33 of the outer circumferential side retainer 30 is formed as a groove.
Although the engaging portion 43a formed on the annular ring 43 of the inner peripheral side retainer 40 is formed as a ridge, it is also possible to form the engaging portion 43a as a groove and the locking means 33a as a ridge.

Further, in the above embodiment, the outer-side retainer has a gate-shaped cross-sectional structure provided with flange portions on both sides, and the inner-peripheral side retainer is integrally engaged with the inner periphery of the flange portion. Configuration. However, the inner peripheral side retainer may have a gate-shaped cross-sectional structure in which flange portions are provided on both sides, and the outer peripheral side retainer may be integrally engaged with the outer periphery of the flange portion.

[0023]

The cage in the cage and roller according to the present invention is divided into an outer side cage having an outer column and an inner side cage having an inner column. The cages are configured to be engaged and integrated by a locking means of a flange portion provided on one of the cages so as to cover the end portions of the roller rows, and a member crossing the pitch circle of the roller rows in the cage. not exist. Therefore, it is not necessary to leave an occupied space for the components of the cage between the adjacent rollers, and the interval between the adjacent rollers can be reduced to the limit. That is, the interval between adjacent rollers is not limited by the structure of the retainer, and it is easy to increase the load capacity by reducing the interval between the adjacent rollers and increasing the number of rollers to be held. it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first embodiment of a cage and roller according to the present invention.

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

FIG. 3 is an exploded perspective view of the cage and roller according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of an outer peripheral side cage in the cage and roller according to the first embodiment of the present invention.

FIG. 5 is a sectional view taken along line CC of FIG. 4;

FIG. 6 is a side view of an inner circumferential side cage in the cage and roller according to the first embodiment of the present invention.

FIG. 7 is a view as viewed in the direction of arrow D in FIG. 6;

FIG. 8 is a sectional view taken along the line EE in FIG. 6;

FIG. 9 is a cross-sectional view of another embodiment of the inner peripheral side cage used for the cage and roller of the present invention.

FIG. 10 is a cross-sectional view of a conventional cage and roller.

11 is a sectional view taken along the line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Cage and roller 22 Roller 22a Groove 23 Cage 30 Outer side cage 31 Outer column 31a Projection 33 Flange 33a Locking means 40 Inner column holder 41 Inner column 43 Ring 43a Engagement

Claims (1)

[Claims] 1. A cage and roller which is a combination bearing comprising a plurality of rollers and a cage for positioning and holding these rollers at predetermined intervals on a predetermined pitch circle without using inner and outer rings, An outer support that inserts the retainer in a position closer to the outside of the pitch circle of the roller row along an axial direction of the roller between adjacent rollers to prevent the roller from falling out radially outward of the bearing. Insert the outer circumferential side cage arranged in a ring shape at predetermined intervals and the adjacent roller at a position closer to the inside than the pitch circle of the roller row along the axial direction of the roller, and radially inward of the bearing. Along with an inner support having a configuration in which inner supports for preventing the rollers from falling off are arranged in a ring shape at a predetermined interval, one of the outer support and the inner support is one of the following.
A ring-shaped flange portion covering the end of the roller row is continuously provided at both ends of the column inserted between the adjacent rollers, the cross-sectional shape is configured as a gate shape, and the other retainer has the above-described shape. A cage-and-roller having an engaging portion integrated with one of the retainers by engaging with a locking means formed on a flange portion.