JPS5916128B2 - How to assemble a full complement cylindrical roller bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for assembling a full complement cylindrical roller bearing having both flanges on either the inner or outer ring.

Final reduction gears for construction machinery, main shafts for plastic extrusion molding machines,
Conventionally, heavy-load cylindrical roller bearings used in rolling mill roll necks, etc., are full complement type bearings consisting of inner and outer rings 1 and 2 and rollers 3, as shown simultaneously in the right half of Figure 1: A and the left half opening. Cylindrical roller bearings or cylindrical roller bearings with cages consisting of inner and outer rings 1, 2, 3, and cage 4 are used. Therefore, a separate type for the inner and outer rings is required, where the inner and outer rings can be installed separately.

However, these cylindrical roller bearings have the following advantages and disadvantages. In other words, the former is the best in terms of increasing the rated load because it is a full roller type, but if you try to attach the inner and outer rings separately to the shaft or frame assembly, the rollers will fall off and disassemble, causing the inner and outer rings to be damaged. This method has disadvantages in that the rings cannot be separated and the inner and outer rings, which are integrally assembled, must be attached at the same time, making handling and assembly difficult. However, the full complement type cylindrical roller bearing 0 includes a cylindrical inner ring 110, an outer ring 12 having an inner flange at the center of the raceway, columnar rollers 13 with guide grooves, and roller rollers to prevent disassembly, as shown in Fig. 2. There is a special type of retaining ring 14 in which the inner and outer rings can be separated. However, in this format '
5, since the rollers have guide grooves, the rated load is smaller than rollers of the same length, so the length of the rollers is increased to increase the rated load, but the axial regulation or It is difficult to prevent ink from skewing, and troubles such as roller breakage sometimes occur. '0 Also, in the latter type, the inner and outer rings can be separated, but because of the width w of the support between cage pockets, the number of rollers is smaller compared to the full roller type, and the effective load rating is reduced. The present invention focuses on the advantages and disadvantages of the conventional cylindrical roller bearings and improves them. In particular, the full complement 05 type cylindrical roller bearing has one of the inner and outer rings that can easily prevent rollers from falling off. It is an object of the present invention to provide a method for assembling a full complement type cylindrical roller bearing having a flange.

The configuration of the present invention will be described below with reference to the embodiments shown in FIGS. 3 to 6.

In FIGS. 3 to 5, 21 is an inner ring, 22 is an outer ring,
23 is a roller, 24 is a diameter of the inscribed circle of the roller, and 25 is a roller fall prevention ring. The roller fall prevention ring 25 is formed by a convexly curved frame portion 27 at both ends of the pocket and a strut portion 26 extending in the axial direction that connects the frame portion 27.
It is located inward from the center of the circle. As shown in FIG. 3A, the strut portion 26 is axially inserted into a substantially triangular gap formed between the circumferentially closely adjacent rollers 23, 23 and the outer diameter surface of the inner ring that becomes the non-flange side raceway groove. The inner diameter of the support column 26 is larger than the diameter of the inscribed circle of the rollers, and in order to prevent the rollers 23 from riding on the support column 26 due to rotation, the rollers of the support column 26 are The height h from the inscribed circle diameter is set to be 15% or more of the roller diameter Dw. In addition, the arcuate frame portion 27 between the pockets of the fall prevention ring 25 has its convex curve reversed to the outside in the radial direction in order to avoid interference between the axial guide of the roller 23 and the outer diameter surface of the inner ring after assembly. . The roller fall prevention ring 25, particularly the roller fall prevention ring 25 of the NU type cylindrical roller bearing having both flanges on the outer ring 22 as shown in the opening of FIG. 3, will be described in more detail.

In order to complete the assembly as shown in FIG. 3A, the roller fall prevention ring 25 must be constructed such that the arcuate frame portion 27 between the support portions 26 is smaller than the roller inscribed circle, as shown in FIG. It must be convexly curved inward and must be processed so that the support column 26 has the required height h, that is, the overall shape is closely arranged in a full complement shape in the circumferential direction. The rollers 23 are machined into a waveform shape that follows the waveform contour on the non-flange side raceway ring (inner ring 21) side, and the grooves between the rollers 23 closely adjacent in the circumferential direction and the non-flange side raceway groove (as shown in Fig. 3 The support column 2 extends in the axial direction and is arranged in a substantially triangular gap formed between the roller inscribed circle 24).
6, and a non-flange side raceway ring (inner ring 21) that connects the support portions 26, 26 in the circumferential direction at the positions of both axial ends of each roller 23.
The frame portion 27 is curved convexly in an arc shape on the side, and this prevents the rollers 23 from falling from the inscribed circular side after the rollers 23 are assembled into the outer ring 22 in a full complement shape. The ring 25 can be inserted in the axial direction, and the direction of the convex curve can be reversed to the outside in the radial direction without changing the length of the arcuate frame part 27 between the pockets after the roller fall prevention ring 25 is inserted. You can hold Koro 23. That is, the fourth
After inserting the roller drop prevention ring 25 as shown in Figure 5A, the arcuate frame part 27 is moved radially outward as shown in Figure 5A and 5A to the extent that the length of the frame part 27 does not change. Assembly is completed by applying force P to reverse the direction of the convex curve of the arcuate frame portion 27 toward the outside in the radial direction. The example shown in FIG. 6 is applied to a type of cylindrical roller bearing having a flange on the inner ring. The roller fall prevention ring 29 which is bent further outward in a wave shape is installed, and after installation, the arcuate frame portion 31 is pressurized radially inward to reverse the direction of its convex curve inward to complete the assembly. do.
In the drawings, 28 is the diameter of the circumscribed circle of the roller, 29 is a roller fall prevention ring, 30 is a support portion, and 31 is an arcuate frame portion. As explained above, the present invention provides a full complement type cylindrical roller bearing having both flanges on either one of the inner and outer rings, in which each roller is closely arranged in a full complement type in the circumferential direction on the non-flange side bearing ring side. A strut portion that is machined into a waveform shape that follows the waveform contour and extends in the axial direction and is disposed in a substantially triangular gap formed between each roller closely adjacent in the circumferential direction and the non-flange side raceway groove; A roller drop prevention ring having a convexly curved frame portion on the non-flange side raceway ring side that is connected in the circumferential direction following the strut portion is placed in advance in a full complement type in the raceway groove of the raceway ring having both flanges. The arranged rollers are inserted from the axial direction so as to match the waveform contour of the non-flange side bearing ring, and then each arcuate frame portion is pressed against the bearing ring side having both flanges to remove the arcuate frame portion. Since the direction of the convex curvature is reversed and each roller is exposed from the frame to the non-flange side of the bearing ring, the rated load increase characteristic, which is a characteristic of full complement cylindrical roller bearings, is not lost, and this feature is eliminated Easily prevents the octopus from separating and falling off.

In particular, the diameter of the pillar part of the roller fall prevention ring does not change at all between before and after installation, and the direction of the convex curve of the arcuate frame is simply reversed. Because almost no load from the rollers acts on them, they can be constructed from extremely thin steel plates, etc., and can be mass-produced easily and inexpensively using presses. The force required to change the shape is extremely small, just like changing the warpage of a thin plate spring past its dead point. All you have to do is reverse the direction of the convex curvature of each arcuate frame using soil inserted from the axial direction into the groove in which the rollers are arranged in a full-roller pattern, making it extremely easy to assemble. It does not change before and after, and from the beginning of the production of the roller fall prevention ring, it is formed so as not to contact the non-flange side raceway groove, and there will be no interference even after installation. Furthermore, the roller fall prevention ring does not expand or reduce the overall diameter, including the support column.
Since it is only necessary to change the direction of the convex curvature of the arcuate frame, it is possible to press one by one or an appropriate number of the arcuate frames without pressing all the arcuate frames at once, so it can be carried out with a simple device. Moreover, it is not necessary to strictly control the accuracy of the final diameter dimension at the time of completion of assembly, as is the case when expanding or contracting the diameter, and if the direction of the convex curve of the arcuate frame is simply changed. It is very easy to implement. Also, the support section necessarily has a cross section of V
Although it is manufactured from a steel plate with the same thickness as the frame, its bending rigidity is greater than that of the frame, which is advantageous.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional cylindrical roller bearing (full roller type and with an E-type cage). FIG. 2 is a sectional view showing an example of a conventional special type full complement cylindrical roller bearing. FIGS. 3A and 3B are a partial side view and a sectional view showing a cylindrical roller bearing according to the present invention. Fourth
Figures 1 and 2 are partial drawings for explaining the manufacturing shape and insertion procedure of the roller fall prevention ring according to the present invention. Figures 5A and 5A are partial drawings showing the final assembly stage of the roller fall prevention ring according to the present invention. FIG. 6 is a partial drawing showing the final assembly stage of the roller drop prevention ring, which is opposite in shape to that shown in FIG. 5. 21...Inner ring, 22...Outer ring, 2
3...Roller, 24...Inscribed circle diameter, 25
...Roller fall prevention ring, 26 ... Support column, 27 ... Arc-shaped frame, 28 ... Circumscribed circle diameter, 29 ...・Roller fall prevention ring, 30...
...Strut portion, 31... Arc-shaped frame portion.

Claims (1)

[Claims] 1. In a full complement type cylindrical roller bearing that has both flanges on either the inner or outer ring, the wavy shape follows the wave profile on the non-flange side raceway ring side of each roller that is closely arranged in a full complement type in the circumferential direction. A support section that extends in the axial direction and is arranged in a substantially triangular gap formed between each of the rollers that are machined and closely adjacent in the circumferential direction and the non-flange side raceway groove, and a support section that extends in the circumferential direction following the support section. On the non-flange side of the rollers, a roller drop prevention ring having a convexly curved frame portion on the non-flange side raceway to be connected is arranged in advance in a full roller shape in the raceway groove of the raceway ring having both flanges. It is inserted from the axial direction so as to match the waveform contour of the bearing ring side, and then each arcuate frame portion is pressed against the bearing ring side having both flanges to reverse the direction of the convex curvature of the arcuate frame portion. A method for assembling a full complement type cylindrical roller bearing, characterized in that each roller is exposed from a frame portion to the non-flange side bearing ring side.