JPS58134222A - One row or four row tapered roller bearing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single-row or four-row tapered roller bearing consisting of an inner race, an outer race, rollers and a cage, the races having no guiding edges.

Tapered cylindrical roller bearings are already generally known. However, these tapered cylindrical roller bearings have the disadvantage that guide edges must always be provided due to the axial forces acting on the rollers, which do not provide an optimal solution during manufacture and use. There is. This means, on the one hand, that the grinding of the races is made more difficult, and on the other hand, the friction increases on the sliding surfaces between the roller end faces and the edges, leading to an additional temperature rise in the bearing.

Now, it is easily conceivable to replace this bearing with a bearing as shown in, for example, US Pat. No. 1,869,890. By using spherical barrel rollers in spherical roller bearings, it is no longer necessary to provide edges, but the sliding portion of the slanted running surface is increased. In addition, manufacturing highly curved rollers is time consuming and expensive. This is because only individual rollers can be manufactured using the so-called infeed grinding method.

It is therefore an object of the present invention to improve bearings of the type mentioned at the outset so that in the simplest construction and in any given bearing size, as high as possible radial and axial load-bearing capacities are obtained with low sliding friction, the individual This allows the parts and especially the rollers to be easily manufactured.

A solution to this problem is described in the +1° characteristic part of claim 1. Special features are indicated in claims 2 to 5.

Due to the slightly smaller diameter of the rollers, at least in the end face region and in the area of suitably designed running surfaces, the distance between the running surfaces of the inner race and the outer race becomes narrower. The movement of the rollers in the - direction is fixed. Force components acting on the rollers in the direction of the roller axis, consisting, for example, of the centrifugal force of the rollers and of the inclination of the races, are absorbed by the running surfaces. Unfavorable guide edges are no longer necessary. Surprisingly, the rollers do not roll into the narrow running surface gap, which is generally feared when the diameter is slightly reduced.The reduction in roller radius distinguishes this new roller from regular cylindrical rollers. The new rollers therefore have the advantage of being simple to manufacture, for example by through-feed grinding, but they require guide edges and the roller end faces have to be ground and ground. The high radial and axial load-bearing capacity of tapered roller bearings is obtained because many narrow rollers can be fitted into the bearing without difficulty in bearings of any size. The sliding area during movement is smaller than with normal barrel rollers.

According to a preferred embodiment, the roller radius becomes progressively smaller. In this case, for example, a roller having a roller circumferential surface whose longitudinal section is curved in an arc at least in the roller end face region is obtained. The rollers that can be most easily manufactured using the through-feed grinding method are rollers that are curved convexly with the same radius over their entire length. The advantages are fully realized for rollers whose radius of curvature is more than ten times the length of the roller.

Bearings with such rollers can hardly be distinguished from Teno (cylindrical roller bearings).

In order to ensure that a bearing with the maximum number of rollers can always be assembled, according to claim 5, the radius of the outer race running surface that stands perpendicular to the bearing axis is should not become smaller again on the side.

Tapered roller bearings according to the invention can be arranged in one row. However, a two-column configuration with an X or zero arrangement is also possible with the same advantages.

With this configuration, if the maximum number of rollers is to be packed, the number of assemblies (at least one race only needs to be divided) for the above reasons.

The invention will be explained in detail below with reference to the drawings.

The single-row tapered roller bearing consists of an outer race 1, an inner race 2, a cage 3, and rollers 4.゛In this case, the rollers 4 have a cylindrical intermediate portion 4' and portions 4'' where the diameter 5 gradually decreases at both end face portions.The outer race 1 and the inner race 20 running surfaces 1/, 2/ also have configured to correspond.

In the case of a reduction in the diameter 5, which is exaggerated in FIG. This prevents it from shifting in the direction.

The embodiment according to FIG. 2 has a similar construction. In this figure, there is a contraction between the outer race 7 and the inner race 8.
A roller 9 with a decreasing diameter 5 is provided, the center of curvature 11 of which lies well beyond the bearing axis 10, and the radius 12 is greater than ten times the roller length 13. The exaggerated curve of the roller with radius 12, together with the correspondingly curved running surface, fixes the axial movement of the roller 9.

As can be seen from FIG. 3, a double row bearing can also be constructed according to the present invention. “In this figure, two bearings according to FIG. 2 are assembled in the 0 configuration. The outer race 16 of the configuration is superior in manufacturing and functionality to, for example, double-row tapered roller bearings.

Figures 4a, 4b and 4c have been added because, as already mentioned above, the reduction in roller diameter is shown in an exaggerated manner. Figure 4a shows a normal cylindrical roller;
Figure b shows a roller according to the invention with a large radius of curvature,
FIG. 4C shows a conventional barrel roller. compare.

and the roller according to Figure 4b is the fourth roller than the roller according to Figure 4C.
It can be seen that it is much more similar to the one shown in Figure a. The incorporation of the roller according to FIG. 4b in a bearing with a suitable running surface section therefore provides the advantages of a Taber cylindrical roller bearing without the disadvantages of a guide edge. Compared to the barrel roller according to FIG. 4C, the roller according to FIG. 4B, apart from the possibility of a longer construction, results in a much cheaper manufacture due to the through-feed grinding method.

On the other hand, barrel-shaped rollers cannot be individually machined by the infeed grinding method because of their large bends.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a single-row tapered roller bearing according to the present invention, FIG. 2 is a partial cross-sectional view of a modification of FIG. 1 with spherically bent rollers, and FIG. Figures 4a to 4c are partial cross-sectional views of a two-row bearing of a bearing similar to the configuration according to Figure 2, showing the known roller and the roller of Figure 2 according to the invention for comparison; be. 1.7---outside □, 2.8---inside u, 4.9
...Roller, 5...Diameter, 6...Fig. 3 for end face

Claims (1)

[Claims] 1. Consisting of an inner race, an outer race, rollers and a cage,
In single-row or four-row tapered roller bearings in which the race does not have a guide edge, the diameter (5) of the rollers (4°9) is at least within the range of both end faces (6) of the rollers (4, 9) from the center of the roller. A single-row or four-row tapered roller bearing, which is slightly smaller and is characterized in that the running surfaces of the outer races (1, 7) and inner races (2, 8) have approximately the same shape. 2. The tapered roller bearing according to claim 1, wherein the diameter is gradually reduced. 3. The tapered roller bearing according to claim 1, wherein the diameter is reduced so that the longitudinal cross section of the roller is circular. Claim 3, characterized in that the circular shape has a radius (12) greater than 10 times the roller length 13).
Tapered roller bearings described in section. 5. A patent characterized in that all tangents that can touch the running surface curves of the outer races (1, 7) cut the bearing axis (10) on one side and in the extreme case are parallel to this bearing axis. A tapered roller bearing according to any one of claims 1 to 4.