Rolling bearing ring having a measuring scale ring, and associated method

Abstract

The invention relates to a rolling bearing ring which is provided at least for pivoting and which is formed with a cylindrical lateral surface on which there is arranged a measuring scale ring which, in interaction with a sensor element which is fixed with respect thereto, makes it possible at least to determine the rotational position of the rolling bearing ring; and to a method for mounting a measuring scale ring on a cylindrical lateral surface of a rolling bearing ring with the aid of a mounting tool which is aligned with the rolling bearing ring, and application of the measuring scale ring is stopped as soon as the mounting tool touches an end face of the rolling bearing ring.

Description

[0001] 2024P00195DE 1 09.09.2024

[0002] Rolling bearing ring with a measuring scale ring and associated method

[0003] Description

[0004] The invention relates to a rolling bearing ring with a measuring scale ring and an associated method.

[0005] Rolling bearings are used in a wide variety of applications where one part needs to be pivotable or rotatable relative to another, for example, a stationary part. Position detection of the two parts relative to each other may be required. This is achieved, for example, by a measuring scale ring on the pivotable or rotatable part and a corresponding sensor element on the stationary part.

[0006] One object of the present invention is to create a precise, but also simple, attachment of such a measuring scale ring.

[0007] The problem is solved by the subject matter of claims 1 and 6. Advantageous embodiments are described in the dependent claims.

[0008] The invention is based on the understanding that a sensor element interacting with a measuring scale ring can only deliver accurate data, in particular position, angle, or rotational position data, if the permissible axial running accuracy or flatness of the measuring scale ring is precisely maintained as one of the key parameters. According to the invention, this is achieved, among other things, by mounting the comparatively thin measuring scale ring on the precisely manufactured, rigid, cylindrical surface of the 2024P00195DE 2 09.09.2024

[0009] The rolling bearing ring is precisely fitted. Therefore, any additional, precisely manufactured and sufficiently rigid ring is advantageously unnecessary.

[0010] A particular advantage is that the measuring scale ring is applied to the rolling bearing ring using an annular mounting tool. This tool is aligned with the rolling bearing ring and stops any axial application movement as soon as it comes into contact with the side surface of the rolling bearing ring. This advantageously leads to repeatable results regarding the position of the measuring scale ring relative to the side surface of the rolling bearing ring. Consequently, a previously necessary, projecting ring, required as an axial end stop for the measuring scale ring to maintain the tight tolerance range for the axial runout of the measuring scale ring, is no longer required. This projecting ring, in order to ensure the axial runout, had to be manufactured with precision and was therefore costly. Now, the function of this axial end stop is essentially taken over by the annular mounting tool.The elimination of the end stop collar simplifies the manufacturing process and reduces machining time and effort. Furthermore, the solution according to the invention also makes it possible to ensure high surface quality, which in turn guarantees highly precise results from the sensor system. The measuring scale ring can initially be roughly positioned by hand on the cylindrical surface of the rolling bearing ring, and the assembly tool then moves the measuring scale ring into its final position.

[0011] The durability of the connection is advantageously ensured by a special fit between the measuring scale ring and the bearing surface of the roller bearing ring. The roller bearing ring with the measuring scale ring can also be advantageously used in designs where no 2024P00195DE 3 09.09.2024 is required.

[0012] Sensor detection is used, and the existing end stop collar would, for example, interfere with it. The stiffness and accuracy described above are of particular importance, among other things, when used as a bearing for a rotary table of a machine tool.

[0013] Further advantages, features and details will become apparent from the exemplary embodiment described below with reference to Figures 1 and 2.

[0014] Figure 1 shows, as an embodiment of the invention, a section through an axial-radial cylindrical roller bearing with a measuring scale ring. The roller bearing comprises an outer ring 10 and an inner ring, which is composed of a first partial ring 22 and a second partial ring 24. The two partial rings 22 and 24 can be screwed together via the illustrated, but not specified, corresponding bores that axially penetrate the partial rings 22 and 24. The outer ring 10 and the inner ring have rolling tracks for a radial roller row 32 of cylindrical rolling elements and two axial roller rows 34 and 38 of cylindrical rolling elements, via which the outer ring 10 and the inner ring can be pivoted relative to each other. The rolling elements of the two axial roller rows 34 and 38 are each arranged in a cage 35 and 39, respectively.

[0015] A measuring scale ring is attached to the outer surface of the inner ring, more precisely to the sub-ring 22. This measuring scale ring can, for example, be made of a thin steel strip and have perforations, as shown in Figure 2 for a section of the measuring scale ring 40. The measuring scale ring 40 on the rotating inner ring is designed to interact with a stationary sensor element to detect, for example, a rotational position, but also other or different parameters, such as the pivoting speed of the inner ring relative to the stationary part. Of course, other materials, manufacturing methods, and designs of the measuring scale ring can be used in other embodiments, as can entirely different physical principles for the measuring scale ring and the associated sensor element.Effects of the interaction between the measuring scale ring and the sensor element.

Claims

2024P00195DE 5 09.09.2024 Patent claims 1. Rolling bearing ring, which is at least intended for pivoting and which is designed with a cylindrical outer surface on which a measuring scale ring is arranged, which in conjunction with a sensor element fixed against it enables at least a determination of the rotational position of the rolling bearing ring.

2. Rolling bearing ring according to claim 1, wherein the rolling bearing ring is designed free of an axial stop, in particular an end stop collar for the measuring scale ring.

3. Rolling bearing ring according to one of claims 1 or 2, wherein the measuring scale ring is made of a strip material, in particular a thin steel strip compared to the rolling bearing ring, and / or is formed in the circumferential direction at least with a coding detectable by the sensor element for said purpose, for example at least a series of perforations.

4. Rolling bearing ring according to one of claims 1 to 3, wherein the rolling bearing ring belongs to a particularly three-row axial-radial roller bearing, in particular with cylindrical rollers.

5. Rolling bearing ring according to one of claims 1 to 4, wherein a rolling bearing belonging to the rolling bearing ring supports a rotary table, in particular of a machine tool.

6. Method for mounting a measuring scale ring on a cylindrical surface of a rolling bearing ring using a mounting tool based on 2024P00195DE 6 09.09.2024 the rolling bearing ring is aligned and the application of the measuring scale ring is stopped as soon as the mounting tool touches an end face of the rolling bearing ring.

7. Method according to claim 6, wherein the rolling bearing ring is designed free of an axial stop, in particular an end stop collar for the measuring scale ring.

8. Method according to one of claims 6 or 7, wherein the measuring scale ring is made of a strip material, in particular a thin steel strip compared to the rolling bearing ring, and / or is formed in the circumferential direction at least with a coding detectable by the sensor element for said purpose, for example at least a series of perforations.

9. Method according to one of claims 6 to 8, wherein the rolling bearing ring belongs to a particularly three-row axial-radial roller bearing, in particular with cylindrical rollers.

10. Method according to one of claims 6 to 9, wherein a rolling bearing belonging to the rolling bearing ring supports a rotary table, in particular of a machine tool.

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