ARRANGEMENT FOR DETECTING A TORQUE ON A MACHINE ELEMENT AND VEHICLE HAVING SUCH AN ARRANGEMENT

Abstract

The present invention relates to an arrangement for detecting a torque on a machine element (01). The arrangement comprises a sleeve (03) arranged on the machine element (01), wherein the sleeve (03) has a magnetized region (07). The arrangement furthermore comprises a magnetic field sensor, which is arranged opposite the sleeve (03), and an intermediate sleeve (02). The intermediate sleeve (02) is arranged between the machine element (01) and the sleeve (03) and has an elevation (04) at each of the two end regions thereof. The elevations (04) come to abut the machine element (01). The sleeve (03) and the intermediate sleeve (02) are connected to one another for conjoint rotation. The invention furthermore relates to a vehicle having an arrangement for detecting a torque on a machine element (01).

Claims

1. An arrangement for detecting a torque on a machine element (01), comprising a sleeve (03) arranged on the machine element (01), wherein the sleeve (03) has a magnetized region (07), furthermore comprising a magnetic field sensor arranged opposite the sleeve (03), characterized in that an intermediate sleeve (02) is arranged coaxially between the machine element (01) and the sleeve (03), that the intermediate sleeve (02) has a radially inwardly directed elevation (04) at each of the two end regions thereof which come to abut the machine element (01) and connect the intermediate sleeve (02) to the machine element for conjoint rotation, and that the sleeve (03) and the intermediate sleeve (02) are connected to one another for conjoint rotation.

2. The arrangement according to claim 1, characterized in that the machine element (01) is a rotating, stationary or moving component.

3. The arrangement according to claim 1 or 2, characterized in that the machine element (01) is a shaft which is in particular a component of a drive train.

4. The arrangement according to any one of claims 1 to 3, characterized in that the sleeve (03) and the intermediate sleeve (02) are connected to one another for conjoint rotation by means of a joining method.

5. The arrangement according to any one of claims 1 to 4, characterized in that the intermediate sleeve (02) has a recess (06) radially between the two end regions in the region of the magnetized region (07) of the sleeve (03) so that a gap (09) is present between the magnetized region (07) of the sleeve (03) and the intermediate sleeve (02).

6. The arrangement according to any one of claims 1 to 5, characterized in that the magnetized region (07) of the sleeve (03) is formed by one or more magnetic tracks.

7. The arrangement according to any one of claims 1 to 6, characterized in that the intermediate sleeve (02) consists of a non-magnetic material.

8. The arrangement according to any one of claims 1 to 7, characterized in that the elevations (04) of the end regions of the intermediate sleeve (02) extend circumferentially.

9. A vehicle having an arrangement for detecting a torque on a machine element (01) according to any one of claims 1 to 8.

Description

[0024] Further advantages and details of the present invention arise from the following description of preferred embodiments with reference to the attached drawing. In the figures:

[0025] FIG. 1 shows an exploded view of an arrangement for detecting a torque according to the invention;

[0026] FIG. 2 shows a sectional view of a first embodiment of the arrangement; and

[0027] FIG. 3 shows a sectional view of a second embodiment of the arrangement.

[0028] FIG. 1 shows an exploded view of an arrangement for detecting a torque on a machine element 01 according to the invention. In the embodiment shown, the machine element 01 is a shaft. An intermediate sleeve 02 is arranged on the shaft 01. On the intermediate sleeve 02, a sleeve 03 is connected for conjoint rotation. The shaft 01, the intermediate sleeve 02 and the sleeve 03 are arranged coaxially to one another. Torques acting on the shaft and the resulting mechanical stresses are thus transmitted to the sleeve 03. The intermediate sleeve 02 consists of a non-magnetic material and has elevations 04 on its axial end regions, wherein the elevations 04 extend radially inwards. The intermediate sleeve 02 rests on the shaft 01 with the circumferentially formed elevations 04. Furthermore, the intermediate sleeve 02 has a circumferential recess 06 on its radially outer side. The sleeve 03 arranged on the intermediate sleeve 02 is connected to the intermediate sleeve 02 by means of a joining method so that micro-slippage of the sleeve is prevented. The sleeve 03 has a magnetized region on its radially outer surface, which is formed by magnetic tracks 07 lying parallel to one another. The magnetic tracks 07 are designed to be circumferential. The arrangement according to the invention has the advantage that the sleeve 03 arranged thereon is magnetically decoupled from the shaft 01 by means of the intermediate sleeve 02 with its elevations 04. There is no crossing of the field lines into the shaft 01 and thus no uneven flux density. As a result, a uniformly high signal quality is achieved by the arrangement according to the invention.

[0029] FIG. 2 shows a sectional view of a first embodiment, which is shown in its basic form in FIG. 1. The embodiment shown in FIG. 2 has an intermediate sleeve 02 with the recess 06 formed, for example, by milling, on the radially outer surface and with a second recess 08 which is formed on the radially inner surface of the intermediate sleeve 02. The two elevations 04 on the end regions of the intermediate sleeve 02 have been produced by the second recess 08. The magnetized sleeve 03 is U-shaped, wherein the end regions of the sleeve are directed radially inwards. A gap 09 is formed between the sleeve 03 and the intermediate sleeve 02.

[0030] FIG. 3 shows a sectional view of a second embodiment, which is shown in its basic form in FIG. 1. The embodiment shown in FIG. 3 is initially similar to that shown in FIG. 2. Deviating from FIG. 2, the intermediate sleeve 02 shown in FIG. 3 is formed from sheet metal. The recess 06 on the radially outer surface of the intermediate sleeve 02 is produced by the ends of the intermediate sleeve 02 directing radially outward. Likewise, the embodiment shown in FIG. 3 has radially inner elevations 04 of the intermediate sleeve 02, between which the second recess 08 is formed. The second recess 08 is formed on the radially inner surface of the intermediate sleeve 02. In contrast to the embodiment shown in FIG. 2, the magnetized sleeve 03 is flat in the embodiment shown in FIG. 3.

[0031] The structure of the intermediate sleeve 02 with the sleeve 03 on the shaft 01 and the gap 09 located in between allows the mechanical stress on the sleeve to be evenly distributed, as a result of which the signal quality remains high.

LIST OF REFERENCE SYMBOLS

[0032] 01 Shaft [0033] 02 Intermediate sleeve [0034] 03 Sleeve [0035] 04 Elevation [0036] 05 - [0037] 06 Recess [0038] 07 Magnetic track [0039] 08 Second recess [0040] 09 Gap