JP2001165157A - Self-aligning radial roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase static load capacity by increasing the number of rollers to the maximum. SOLUTION: This self-aligning radial roller bearing 1 with a plurality of rollers 4 disposed between an inner ring 2 and an outer ring 3 through steel plate punched cages 5 is characterized by arranging the cage 5 closer to the inner ring 2 side from the center axis C of the roller 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radial self-aligning roller bearing in which a plurality of rollers are disposed between an inner ring and an outer ring via a steel sheet punching retainer.

[0002]

2. Description of the Related Art In a conventional radial self-aligning roller bearing of this type, a press retainer is arranged along a central axis of a roller, whereby a roller is held at equal intervals in a circumferential direction, and a roller is held at an equal interval. It has a function to control skew.

[0003]

By increasing the number of rollers, the static load capacity of the bearing can be increased, and the bearing can be made thinner in cross section. In this case, the roll diameter can be reduced. However, in the conventional radial self-aligning roller bearing described above, since the press retainer is arranged along the center axis of the roller, the number of rollers is limited by the width dimension of the column between the pocket portions accommodating the roller. There is a problem that can not be increased.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a radial self-aligning roller bearing capable of increasing the number of rollers as much as possible to increase the static load capacity. I do.

[0005]

SUMMARY OF THE INVENTION In order to solve such a problem, a radial self-aligning roller bearing according to the present invention has a plurality of rollers disposed between an inner ring and an outer ring via a steel plate punched retainer. A radial self-aligning roller bearing, wherein the retainer is disposed on an inner ring side of a center axis of the roller.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part for describing a radial self-aligning roller bearing which is an example of an embodiment of the present invention. FIG. 3 is a view seen from the lower side of FIG.
FIG. 7 is a cross-sectional view of a main part for describing a radial self-aligning roller bearing according to another embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a double-row radial self-aligning roller bearing in which a plurality of rollers 4 are disposed between an inner ring 2 and an outer ring 3 via a steel plate punching and holding device 5.
Is not provided with a collar portion, and the rollers 4 are symmetrical rollers. The steel plate punched retainer 5 has a tapered cylindrical shape. As shown in FIGS. 2 and 3, a plurality of pockets 6 for accommodating the rollers 4 are formed on the outer peripheral surface at substantially equal intervals in the circumferential direction by punching. ing. Here, the steel plate punched retainer 5 is disposed closer to the inner ring 2 than the center axis C of the roller 4 when being disposed concentrically with the inner and outer rings 2 and 3 in consideration of assemblability. Therefore, as shown in FIG. 2, the lower portion of the roller 4 in the circumferential direction is accommodated in the pocket portion 6. In this accommodated state, the function of controlling the skew of the roller 4 is provided, while the roller 4 is provided with the outer ring. It comes off on the 3rd side.
Thereby, even if the interval between the adjacent pocket portions 6 of the retainer 5 is reduced, the width dimension of the pillar 7 between the pocket portions 6 can be secured, and as a result, the number of rollers can be increased.

Further, as shown in FIG. 3, the inner peripheral surface of the pocket portion 6 is subjected to face pressing in accordance with the barrel curvature of the roller 4 so that the roller 4 has a shaft end side. Pillar 7
Can be made larger than the central portion, and as a result, it is possible to further reduce the interval between the pocket portions 6 adjacent to each other. Further, a retaining ring 8 is provided on both inner diameter surfaces of both ends or one end inner diameter surface of the outer ring 3 so that the outer ring 3 and the inner ring 2 are unnecessarily aligned and the rollers 4 do not come off.
Is installed. The retaining ring 8 functions as a stopper at the time of centering, and can be easily separated from the outer ring 3, the inner ring 2, the rollers 4, and the retainer 5 by removing the retaining ring 8 from the inner diameter surface of the outer ring 3, Therefore, the bearing can be reused by replacing only worn parts with parts having dimensional compatibility.

As described above, in this embodiment, since the number of rollers can be increased, the static load capacity of the bearing can be increased, and the cross section of the bearing can be made thin. In the case where the roll is used for an application roll, the roll diameter can be reduced. FIG. 4 shows an example in which the oil seal 9 is attached. The oil seal 9 is of a type in which the lip 10 faces outward in the axial direction to prevent foreign matter from entering from outside. The function of the retaining ring 8 described above is substituted by a metal ring 11 integrally formed with the lip 10. It is like that.

[0010]

As is apparent from the above description, according to the present invention, the effect that the number of rollers can be increased as much as possible to increase the static load capacity of the bearing can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part for describing a radial spherical roller bearing as an example of an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a state where rollers are accommodated in a pocket portion of a retainer.

FIG. 3 is a view as seen from the lower side of FIG. 2;

FIG. 4 is a cross-sectional view of a main part for describing a radial self-aligning roller bearing according to another embodiment of the present invention.

[Description of Signs] 1 ... Radial self-aligning roller bearing 2 ... Inner ring 3 ... Outer ring 4 ... Roller 5 ... Steel plate punched cage 6 ... Pocket portion 7 ... Column C ... Center axis of roller

Claims (1)

[Claims] 1. A radial self-aligning roller bearing in which a plurality of rollers are disposed between an inner ring and an outer ring via a steel plate punched retainer, wherein the retainer is disposed on the inner ring side of a center axis of the rollers. A radial self-aligning roller bearing characterized by being arranged.