DE8437115U1 - Fixed bearings for shafts, in particular for ball screws - Google Patents

Description

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FAG Kugelfischer Georg Schäfer KGaA R-RS-801-wa-st

Fixed bearings for shafts, especially for ball screws.

The innovation relates to a fixed bearing according to the preamble of the claim.

Bearings of the type mentioned are z. B. from DE-OS 29 17 425 known. For absorbing the axial forces two axial roller bearings are provided here. The radial forces are taken over by one between the two axial bearings arranged needle bearing. This is a bearing in which the rolling conditions in the axial cylindrical roller bearings are not ideal. This is because constraining forces occur which have increased coefficients of friction and thus also lead to increased temperatures. This can lead to premature bearing failure.

It is therefore the task of the innovation to improve the storage according to the preamble of the claim and in particular to show a simple construction consisting of a few parts, which under ideal rolling conditions maintains the highest possible stiffness.

The solution is presented in the characterized part of the claim.

When using tapered roller bearings according to the marked Part of the claim, the forces of friction that occur with cylindrical roller bearings are avoided. The result is ideal rolling conditions. An increase in temperature is therefore not to be feared, which is why premature bearing failure is not expected who, the must. By using tapered roller bearings that are guided on the edges of the housing or shaft washer, it is still possible both axially and radially

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Transferring burdens. An additional radial bearing is therefore no longer required. aside from that the result is a symmetrical and therefore easier one Structure of the bearing, with the same stiffness axially on both sides.

The innovation is shown in detail using two figures.

Figure 1 shows a cross section of the storage according to the innovation.

Figure 2 shows a section of the storage according to Figure 1, with only the arrangement of the shelves in another Way is executed. 15th

The fixed bearing according to FIG. 1 consists, among other things, of the two shaft washers 1, the housing washer 2 and the two rows of axial tapered rollers 3. These parts are used to support the shaft 4 of a ball screw drive in the housing 11.

Both rows of tapered rollers 3 have perpendicular 'on the Shaft axis 5 arranged roller axes 3 '. Furthermore, the extension lines 6 'of the raceways intersect 6 on the shaft axis 5. This ensures that ideal rolling conditions are always present. So that the tapered rollers in rows 3 are guided axially

the, are mounted both in the shaft washers 1 and in the housing washer 2 Borde 7, on which the Start tapered rollers.

FIG. 2 differs from FIG. 1 only in that rims 8 are only attached to housing disk 9 are provided. This results in a simpler design of the two wave washers 10.

Claims (1)

m 9 * · * ■ ο FAG Kugelfischer Georg Schäfer R-RS-801-wa-st Limited partnership on shares 12/18/1984 claim Fixed bearings for shafts, in particular ball screws, consisting of roller bearings which can transmit axial forces in both directions and radial forces, characterized in that one housing washer (2, 9) each at least one row of tapered rollers (3) perpendicular to the shaft axis (5) arranged roller axles (3 ^{1 ) and with extension lines (6 1} ) of the raceways (6) intersecting on the shaft axis (5) and facing a wave washer (1, 10), the housing washer (2 , 9) and / or the wave washers (1) have radially outer rims (7, 8). * «Uiin
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