DE8132600U1 - Rolling bearings for short axial travel - Google Patents

Description

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SKF KUGELLAGERPABRIKEN GMBH Schweinfurt, 1981-11-03

DE 81 049 DE TPA / Ko-gs

Rolling bearings for short axial travel

The innovation concerns a rolling bearing for short axial travel, consisting of a cage with rolling elements and a thin-walled, Shaped from sheet metal sleeve with laterally arranged, radially directed projections to limit the Axial travel.

A roller bearing of this type is known from DE-GM 7 321 955. The outer sleeve is used here to limit the axial travel flanged on both sides, so that ring-shaped inwardly directed projections arise. Such an outer sleeve is can only be produced with great mechanical effort and thus makes the entire rolling bearing more expensive.

The task of the innovation is to create a roller bearing for short axial travel, in which the sleeve with simple and inexpensive Means to be produced to limit the axial travel is provided.

-A-

The object is achieved in that the projections as distributed on the circumference of the sleeve, through slots or the like. From each other separate retaining tabs are formed.

The retaining tabs have only a small width in the circumferential direction on. As a result, there is a slight flow of material when bending and this mainly occurs at the bending point. Dsr radially directed section of the retaining tab almost retains its shape. Advantageously enough in this embodiment simple bending tools. The sleeve does not have to be rotated, so that bending over with simple Funds can be carried out and is inexpensive overall. There can be a few, somewhat wider, or several narrow retaining tabs are provided against which, for example, the cage of the rolling elements runs and thereby the axial path limited. It does not matter whether the sleeve is an outer sleeve with retaining tabs directed radially inward or is designed as an inner sleeve with radially outwardly directed retaining tabs.

According to a further feature of the innovation, the retaining tabs protrude only slightly radially for the contact of the rolling elements arranged and the cage is formed lying radially outside the radial extent of the retaining tabs.

In the case of an outer sleeve, the cage has a smaller outer diameter than the inner diameter of the outer sleeve in the area of the holding tabs. The same applies to an inner sleeve the outside diameter in the area of the retaining tabs is made smaller than the inside diameter of the cage. At this Execution of the axial travel is limited by the fact that the rolling elements run directly against the retaining tabs. That has the advantage, that, based on the total length of the roller bearing, the greatest possible axial travel is used.

In another embodiment, the sleeve has an axially continuous slot.

This greatly simplifies the assembly of the rolling bearing. In this case, the cage is opened with a slightly expanded outer sleeve or retracted inner sleeve. The sleeve then returns elastically to its nominal size. Another The advantage is that the sleeve can be produced extremely inexpensively by, for example, a sheet metal strip is punched out of sheet metal with lateral projections for the retaining tabs and then rolled. When rolling can at the same time the retaining tabs are bent over.

The innovation is described below using an example shown in the drawing.

Show it:

Fig. 1

the longitudinal section of a rolling bearing for short axial travel with retaining tabs and

2 shows the side view of the roller bearing shown in FIGS. 1 and 2.

The roller bearing can cover short axial paths on an axis 1 in both directions. It consists of a cage 2 with two rows of balls 3 arranged next to one another and an outer sleeve 4 with a cylindrical raceway 5 in the Drilling. The outer surface 6 of the axis 1 is designed accordingly as a raceway. The outer sleeve 4 has free on both Ends holding tabs 7, which are bent radially inward. They limit the axial travel of the outer sleeve 4 on the axis 1 or vice versa of the axis 1 in the outer sleeve 4, in that the balls 3 run directly against it. The retaining tabs 7 are only directed inward so far that they cannot touch the outer surface of the cage 2. This is the greatest possible Axial travel of the balls 3 in the outer sleeve 4 is utilized.

As shown in Fig. 2, the retaining tabs 7 are distributed on the circumference of the outer sleeve 4 and just so wide that at Rotation of the cage 2 with respect to the outer sleeve 4 can always run a ball 3, whereby a safe limitation in is guaranteed in all positions. In order to simplify the manufacture and assembly of the rolling bearing, the outer sleeve 4 has a continuous slot 8. While a rolling bearing with an outer sleeve is described here, the idea of innovation can also be used for roller bearings with inner sleeves.

Claims (3)

SKF KDGELLAGERFABRIKEN GMBH Schweinfurt, 1981-11-03 DE 81 049 DE TPA / Ko-gs Rolling bearings for short axial paths, protection requirements 1. Rolling bearing for short axial travel, consisting of a cage (2) with rolling elements (3) and a thin-walled, Shaped from sheet metal sleeve (4) with laterally arranged, radially directed projections to limit the Axial travel, characterized in that the projections are distributed as on the circumference of the sleeve (4), through slots or the like. Separate retaining tabs (7) are formed. 2. Rolling bearing according to claim 1, characterized in that the retaining tabs (7) for the contact of the rolling bodies (3) only are arranged slightly protruding radially and the cage (2) radially outside the radial extent of the Holding tabs (7) is designed horizontally. 3. Rolling bearing according to one of claims 1 or 2, characterized characterized in that the sleeve (4) has an axially continuous slot (8).