Adapter for attaching a sensor rotor to one end of a shaft

Abstract

Adapter (1) for attaching a rotor (3) of a sensor to one end of a shaft (2), characterized in that the adapter (1) has a first end region (11) and an opposing second end region (12), that at least one fastening structure for attaching the rotor (3) is provided in the first end region (11) and / or in the second end region (12), and that a fastening structure for attaching to a shaft (2) of a first shaft type and a fastening structure for attaching to a shaft (2) of a second shaft type are provided in the second end region (12).

Description

[0001] The invention relates to an adapter for fastening a rotor of a sensor to one end of a shaft.

[0002] Sensors are commonly used in many applications to determine the rotational speed or angle of a shaft. Some sensors have a rotor attached to the shaft that interacts with a stator to measure the rotational speed or angle of the shaft. Such rotors are often attached to one end of the shaft.

[0003] Sensors used to detect the rotation of the shaft include, for example, sensors as disclosed in the documents DE 10 2004 027 954 A1 and DE 20 2006 007 778 U1.

[0004] In practice, different types of shafts are used and the installation space in which the shafts are used can also be designed differently. In order to be able to use a sensor type with a rotor and a stator with different shafts and in different installation spaces, adapters are used which make it possible to mount the rotor of one sensor type on different shaft types. For each combination of sensor type or rotor type on the one hand and shaft type on the other, adapters adapted to both the sensor and the shaft type are provided. In addition, even with the same shaft types and the same rotor types, additional adapters are used depending on the available installation space. Therefore, many different adapters are required to attach the rotors to the shafts.

[0005] The invention is based on the object of reducing the number of different adapters required.

[0006] This object is achieved according to the invention in that the adapter has a first end region and an opposite second end region, and in that fastening structures for fastening a rotor are provided in the first end region and / or in the second end region.

[0007] It is particularly advantageous if, in an adapter according to the invention, the fastening structures for fastening the rotor are identical in both end regions of the adapter. In this case, one and the same rotor can be fastened in the same way to both end regions of the adapter. However, it is also possible for the fastening structures for fastening the rotor to be different at the two end regions of the adapter. In this case, the rotor can also have different fastening structures with which the rotor can be fastened to one end region or to the other end region. It is also possible for several different fastening structures for fastening a rotor to be provided at one or both end regions of the adapter, so that rotors of different rotor types can be fastened to the end region or the ends.If several fastening structures are provided for fastening the rotor at each of the ends, the fastening structures at the two ends may be the same or different or partially the same and partially different.

[0008] Likewise, each adapter according to the invention has fastening structures in the first end region and / or in the second end region for fastening to a shaft of a first shaft type and / or to a shaft of a second shaft type. An adapter according to the invention can thus be fastened to a shaft either by means of the first end region or by means of the second end region. The adapter can be designed such that the two end regions have the fastening structures for fastening to a shaft of a first shaft type and to a shaft of a second shaft type. However, it is also possible for only one end region to have the fastening structures for fastening to a shaft of a first shaft type and to a shaft of a second shaft type, while the other end region only has the fastening structure for fastening to one of the two shaft types or no fastening structures at all.

[0009] If identical fastening structures for fastening the adapter to a shaft are provided in both end regions of the adapter, the adapter can be fastened to shafts of the same type with the first end region or with the second end region. The rotor can then be fastened to the end of the other end region or to the end of the same end region. This can be advantageous if differently designed installation spaces are available when using the same shaft and perhaps also the same rotor. If different fastening structures for fastening the adapter to a shaft are (also) provided in both end regions of the adapter, the adapter can be fastened to shafts of different types with the first end region or with the second end region and the rotor is then fastened to the other end region.Several different fastening structures for attaching the adapter to a shaft can be provided in one or both end areas of the adapter.

[0010] As a fastening structure for attaching the adapter to the shaft, the adapter can have a recess at one or both ends that can be slipped onto one end of the shaft. The recess can be formed by the interior of a hollow cylindrical tube that forms the adapter or a significant part of the adapter. The inner diameter of the tube can be slightly smaller than the outer diameter of the shaft, allowing the tube to be clamped onto the shaft.

[0011] It is also possible for the adapter to have a circular cylindrical surface as a fastening structure at one or both ends to secure the adapter to the shaft. This surface can be inserted or pressed into a cavity at the end of the shaft. The shaft could then be a hollow shaft. The circular cylindrical surface can be an outer surface of a collar of the adapter.

[0012] An adapter according to the invention can comprise a tube, in particular one with a circular cross-section, on the outside of which the collar is attached. The collar and the tube can be one piece. The inner diameter of the tube can be the same, at least in particular at both ends of the tube. Likewise, the outer diameter of the tube can be the same at both ends.

[0013] An embodiment of an adapter according to the invention is described in more detail with reference to the drawings. It shows Fig. 1 the embodiment in a first arrangement with a hollow shaft and a rotor in a sectional view and Fig. 2 the embodiment in a second arrangement with a shaft made of solid material and the rotor in a sectional view.

[0014] The exemplary embodiment of an adapter 1 according to the invention shown in the figures is a rotationally symmetrical part. It comprises a tube, preferably made of metal, and a collar 121, preferably made of metal, placed on the outside of the tube. The tube has the same outer diameter and the same inner diameter at its ends. The collar 121 is provided in a second end region 12 of the adapter 1 at a distance from the second end of the tube. In a first end region 11, the tube has a uniform outer diameter.

[0015] The preferably metallic collar 121 is connected to the metallic pipe, for example, via a welded connection.

[0016] In the first arrangement, the first end region 11 of the adapter 1 extends into the shaft 2, which is designed here as a hollow shaft, and the collar 121 of the second end region 12 is pressed into the hollow shaft 2. The inner wall of the hollow shaft 2 has a shoulder 21 against which the collar 121 rests. The inner diameter of the hollow shaft 2 in the area of ​​the shoulder 21 is slightly smaller than the outer diameter of the collar 121 on the adapter 1. The rotor 3 is attached to the second end of the adapter 1. In principle, it would also be possible for the rotor to be attached to the first end, which extends into the shaft 2.

[0017] In the second arrangement, the second end portion 11 of the adapter 1 is fitted with an internal recess onto the end of the shaft 2, which is here designed as a solid shaft. The recess is formed by the interior of the hollow cylindrical tube, with the inner diameter of the tube being slightly smaller than the outer diameter of the shaft 2, onto which the tube is clamped. The rotor 3 is attached to the opposite first end of the adapter 1.

[0018] The orientation of the adapter 1 relative to the end of the hollow shaft (first embodiment) is thus rotated by 180° compared to the orientation of the adapter relative to the end of the solid shaft (second embodiment).

[0019] The adapter 1 could be connected to the hollow shaft of the first arrangement from the Fig. 1 can also be arranged (not shown) in such a way that the end of the second end region 11 is inserted into the hollow shaft, the collar 121 of the second end region 12 is pressed into the hollow shaft and the rotor is fastened to the first end of the adapter 1. This results in comparison to the arrangement shown in the first Fig. 1, a larger distance between the end of the hollow shaft and the rotor is used. This variation makes it possible to arrange the same hollow shaft and the same rotor 3 in different ways using the same adapter 1, depending on the installation space requirements.

[0020] As a fastening structure for securing the rotor 3, the adapter 1 has an end face at each of its end regions, preferably at each end, to which the rotor 3 is fastened, for example, by welding or gluing. However, structures for a plug connection, a snap connection, a screw connection, and any other suitable connection could also be provided on the adapter 1 and the rotor 3.

[0021] Particularly in the case of a tubular adapter 1 made of metal, if the rotor 3 with its rotor blades is designed as a stamped sheet metal part, it is preferably provided to be optionally attached (depending on the type of shaft intended) to one or the other end face of the tube via a welded connection. However, it is also possible for the rotor to have a printed circuit board on which conductor tracks are provided. List of reference symbols 1 adapter 11 first end area 12 second end area 121 collar in the second end area 2nd wave 21 paragraph of the wave 3 Rotor QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 102004027954 A1

[0003] DE 202006007778 U1

[0003]

Claims

[1] Adapter (1) for attaching a rotor (3) of a sensor to one end of a shaft (2), characterized by , - that the adapter (1) has a first end region (11) and an opposite second end region (12), - that in the first end region (11) and / or in the second end region (12) at least one fastening structure for fastening a rotor (3) is provided and - that in the first end region and / or in the second end region (12) at least one fastening structure is provided for fastening to a shaft (2) of a first shaft type and / or to a shaft (2) of a second shaft type. [2] Adapter (1) according to claim 1, characterized by that the fastening structure for fastening the rotor (3) in both end regions (11, 12) of the adapter (1) is identical. [3] Adapter (1) according to claim 1, characterized bythat the fastening structures for fastening the rotor (3) to the two end regions (11, 12) of the adapter (1) are different. [4] Adapter (1) according to claim 1, characterized by that at one or both end regions (11, 12) of the adapter (1) several different fastening structures for fastening a rotor (3) are provided, wherein the fastening structures at both end regions are the same, partly the same and partly different or different. [5] Adapter (1) according to one of claims 1 to 4, characterized by that identical fastening structures for fastening the adapter (1) to a shaft (2) are provided in both end regions (11, 12) of the adapter (1). [6] Adapter (1) according to one of claims 1 to 5, characterized by that in both end regions (11, 12) of the adapter (1) different fastening structures are provided for fastening the adapter (1) to a shaft (2). [7] Adapter (1) according to one of claims 1 to 6, characterized by that in one end region or both end regions (11, 12) of the adapter (1) several different fastening structures for fastening the adapter (1) to a shaft (2) are provided, wherein the fastening structures in both end regions are the same, partly the same and partly different or different. [8] Adapter (1) according to one of claims 1 to 7, characterized by that the adapter (1) has a recess as a fastening structure for fastening the adapter (1) to the shaft (2) at one or both ends. [9] Adapter (1) according to one of claims 1 to 8, characterized by that the adapter (1) for fastening the adapter (1) to the shaft (2) has as a fastening structure in one or both end regions (11, 12) of a circular cylinder shell surface. [10] Adapter (1) according to claim 9, characterized bythat the circular cylinder surface is an outer surface of a collar (121) of the adapter (1).

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