WO2012004064A1

WO2012004064A1 - Device and method for detecting a torque

Info

Publication number: WO2012004064A1
Application number: PCT/EP2011/059075
Authority: WO
Inventors: Ronny Ludwig
Original assignee: Robert Bosch Gmbh
Priority date: 2010-07-07
Filing date: 2011-06-01
Publication date: 2012-01-12
Also published as: DE102010031064A1

Abstract

The invention relates to a device for detecting a torque (1) and comprises a base (2), at least one region for immobilizing the device, especially on a shaft (w), an extension-sensitive measuring structure (4), measuring means for generating a measurement signal (5) based on the change in shape and/or position of the measuring structure, and means (6a, 6b) for transmitting the measurement signal. The invention also relates to a corresponding method of production and a corresponding use.

Description

Description title

Device and method for detecting a torque

State of the art

The invention relates to a device for detecting a torque and a corresponding manufacturing method.

Such devices or such a method are inter alia in

Motor vehicles used to generate torque on a rotatable shaft,

For example, on a handlebar or steering shaft to determine.

From DE 2005 01 1 196 A1 is a sensor arrangement for detecting a

Difference angle has become known. The sensor arrangement comprises at least one magnetically sensitive sensor element with the magnetic field information of a

Magnetic circuit can be evaluated, which is rotatable relative to the sensor element in particular due to a torque acting on a torsion bar. These are

Flux rings present, which have axially extending, non-interlocking teeth with which the magnetic flux between a Magnetpolrad and the sensor element can be influenced. The flux rings are formed such that the sensor element and the magnetic pole wheel are located between the smaller diameter inner flux ring and the larger diameter outer flux ring.

Although these sensor elements have a high angular resolution, but is the

Production of such sensor arrangements or elements expensive and complicated. For example, the metallic flux directors necessary for conducting the magnetic flux must be aligned with high positional accuracy for the magnetic flux and must also maintain this position throughout their lifetime. Disclosure of the invention

The device for detecting a torque defined in claim 1 comprises a base, at least one region for fixing the device, in particular on a shaft, a strain-sensitive measuring structure, measuring means for generating a measurement signal based on a change in the shape and / or position of the measuring structure and means for Transmitting the measurement signal. The method defined in claim 9 for producing a device for measuring a torque, in particular according to at least one of claims 1 -8, comprises the steps of arranging at least one strain-sensitive measuring structure on a base, arranging measuring means for generating a measurement signal based on a change of shape and / or position of the measurement structure on the base, arranging means for transmitting the measurement signal to the base.

In claim 1 1 is a shaft with a device according to at least one of

Claims 1 -8 defined, wherein the device is fixed on at least a portion of the shaft and the shaft comprises means for connection to an external shaft (W).

Claim 12 defines a use of a device according to at least one of claims 1-8 for detecting a torque. Advantages of the invention

The device defined in claim 1, the method defined in claim 9 for producing a device for detecting a torque as well as the use defined in claim 12 have the advantage that the device can be made very small and compact. Next is the production of the device

inexpensive.

The measuring means may comprise a Wheatstone bridge. Thus, a very compact design of the device is realized and at the same time the device can be manufactured very inexpensively, since no expensive components such as hall-integrated circuits, flux guides, etc. must be used. According to an advantageous development of the invention, the measuring structure is mechanically structured and in particular comprises recesses and / or a bending beam.

The advantage here is that the measuring structure can be manufactured and arranged easily, inexpensively and in a space-saving manner.

According to a further advantageous embodiment of the invention, the base is sleeve-shaped. The advantage of this is that the base can be easily pushed onto a shaft and reliably connected to it. According to a further preferred embodiment of the invention, the means for

Transmitting the measurement signal designed for contactless transmission and comprise in particular inductive means, preferably in the form of at least one coil. Due to the contactless transmission of the measuring signal, the device is wear-resistant. Likewise, not only a transmission of the provided measurement signal is possible, but also a transmission of electrical energy. By an inductive

Coupling by means of the corresponding means a particularly simple, inexpensive contactless transmission of the measurement signal or the electrical energy is achieved.

According to a further preferred development of the invention, the measuring structure is substantially meandered and / or bar-shaped. The advantage of this is that larger structures sensitive to expansion can be realized with correspondingly little space, that is, the accuracy of the detection of a torque is thereby further increased overall. According to a further preferred embodiment of the invention are means for

Avoiding overloading of the device arranged, in particular in the form of at least one stop surface. The advantage here is that in a simple and inexpensive way, an overload of the device can be avoided, which significantly increases the life of the device.

According to a further preferred embodiment of the invention, the device has a radially projecting edge region, wherein at least partially the measuring means and / or the means for transmitting the measuring signal are arranged on the edge region. The advantage here is that it uses the radially projecting edge region for the arrangement of further components, for example, means for transmitting the measurement signal, so that an improved transmission of the measurement signals or energy is possible. The flexibility of the device is thus increased overall. A further advantage here is that the measuring means and / or the means for transmitting the measuring signal are thus spaced from the measuring structure, so that the latter can be arranged optimally without restrictions by the measuring means or the means for transmitting, in particular, in an arrangement and / or training the measurement structure must be considered. Overall, this further increases the flexibility and reliability of the device.

According to a further preferred development of the invention, the device comprises a housing in which in particular further means for non-contact transmission of signals are arranged. The advantage hereby is that it protects the means for measuring the physical quantity, the means for providing a signal and the means for the contactless transmission in particular through the housing, which considerably increases the accuracy, reliability and service life of the device.

According to a further preferred development of the method, the arrangement of measuring means on the basis comprises the steps: arranging measuring means, in particular a Wheatstone bridge, on a substrate, preferably a steel substrate, singulating at least one module comprising the measuring means and a part of the substrate, Setting the module on the base, contacting the module, in particular by means of wire bonding. The advantage here is that a device for measuring a torque can be produced even faster and more cost-effectively.

A shaft according to claim 1 1 has the advantage that so that the shaft together

Device in a particularly simple manner, for example by a

Screw connection, connected to a steering shaft of a vehicle or in a

Steering linkage is integrable. Such integration in a steering linkage can be done for example in the passenger compartment of the vehicle as an immediate coupling element to the steering wheel or as a coupling element on a joint or in the engine compartment of the vehicle as an immediate coupling element to the steering gear.

Brief description of the drawings

Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it: Fig. 1 a, a device according to a first embodiment of the present invention

Invention in perspective view;

Fig. 1b a device according to the first embodiment of the present invention

Invention according to Figure 1 a in schematic form.

Fig. 2a, b, c, d, a device according to the first embodiment of the present invention

Invention according to Figure 1 in transverse and plan views;

Fig. 3a, b, c is a representation of the surface of the base of the device according to the first embodiment of the present invention shown in Figure 1 in loaded and unloaded states.

4a, b, c, d representations of the device according to the first embodiment with differently shaped measuring structures;

Fig. 5 is a block diagram of an apparatus according to the first embodiment of the present invention;

Fig. 6a, b, c, a device according to a second embodiment of the present invention

Invention in transverse and plan views;

7 shows a shaft with a device according to a third embodiment of the present invention;

Fig. 8a, b, a device according to a fourth embodiment of the present invention

Invention;

9 shows a part of a device according to the fourth embodiment of the present invention; such as

10 shows a part of a method for producing a device according to the fourth embodiment of the present invention

Embodiments of the invention In the figures, like reference numerals designate the same or functionally identical elements.

Fig. 1 shows a device according to a first embodiment of the present invention in perspective view.

In Fig. 1, reference numeral 1 denotes a torque detecting device according to the present invention. The device comprises a base in the form of a sleeve 2, made in particular of metal, preferably steel. The sleeve 2 is mechanically prestructured. In the embodiment shown in FIG. 1, one is substantially

Measuring structure in the form of rectangular recesses 4 and a bending beam 5 'arranged in the sleeve 2, which extend partially on the peripheral surface of the sleeve 2. The sleeve 2 is pushed onto a shaft W and connected thereto by means of welding points 3a in end regions 3 of the sleeve 2 with the shaft W. Of course, other types of attachment are conceivable.

The shaft W has in the region of the sleeve 2 a taper W _a (shown in Fig. 2c), so that the sleeve 2 and shaft W essentially form a torsion bar. The taper W _{a of} the shaft W serves to obtain a precisely defined torsion. A

Total torsion is thus determined by the shaft W, the taper W _a and the fixed to the shaft W device 1.

Between the rectangular recesses 4 of the sleeve 2, a Wheatstone bridge 5 is arranged, which is arranged on the one hand on the bending beam 5 'and on the other hand via an electronic component 1 1 (shown in Fig. 3) is connected to a first coil 6a. The first coil 6a comprises windings which are arranged parallel to the axis of the sleeve 2 or the shaft W on the sleeve 2 below the end region 3 and above the recesses 4. In Fig. 1 b, a second coil 6b is additionally shown in schematic form, which is arranged on the radially outer side of the first coil 6a and spaced therefrom. Both coils 6a and 6b interact inductively for non-contact transmission of signals. The second coil 6b is furthermore connected to a voltage source 8 via lines 7 and to an evaluation unit (not shown in FIG. 1b) for evaluating a signal S of the Wheatstone bridge 5 processed in the electronic module for detecting a torque. On the one hand, the second coil 6b can receive an electrical signal S of the Wheatstone bridge 5, which is transmitted through the coil 6a, and to an evaluation unit At the same time, an energy signal can also be transmitted from the energy source 8 via the lines 7 and further via the coil 6b to the coil 6a and thus to the Wheatstone bridge 5 on the bending beam 5 ', so that in this way a separate energy supply of the Wheatstone Bridge 5 can be omitted. The Wheatstone bridge 5 is strain-sensitive, it is in surface technology by means of chemical

Deposited vapor deposition and passivated in addition, to ensure protection against environmental influences.

Furthermore, at least one electronic component 1 1 (not shown in FIG. 1) is arranged on the sleeve 2, which comprises a logic circuit 1 1 c, an analog-digital converter 11 b, a high-frequency modulator 11 d, or demodulator, in order to generate electrical signals S, which are particularly high-frequency modulated and digital to transmit without contact. The size of the device is essentially only by the dimensions of the sleeve 2, arranged on the sleeve 2 Wheatstone bridge 5, the electronic module 1 1, etc., and by a not shown in Fig. 1 housing 9, which is also a second coil 6b and further electronics in the form of an evaluation unit 13 with a power source 13a, a logic circuit 13c and a high-frequency modulator or demodulator 13d and corresponding printed circuit boards 14b includes determines or determines.

Fig. 2 shows a device according to the first embodiment of the present invention according to Fig.1 in transverse and plan views.

In Fig. 2a is a schematic representation in detail a representation of FIG. 1 b shown. There is an inductive coupling K between the coils 6a, 6b for operating the device 1. The windings of the coil 6b are arranged in a housing 9 which completely surrounds the sleeve 2. About the coils 6a, 6b is analogous to the principle of a transformer electrical energy and also a digitally modulated

electrical signal S high-frequency transmitted from the first coil 6a to the second coil 6b. The signal S is an electrical signal in the form of a change of a bridge voltage, which is generated by the Wheatstone bridge 5 in a torsion of the shaft W and thus the sleeve second

In Fig. 2b, the device of FIG. 1 a is shown in the side view with a housing 9 surrounding the device. The dimensions of the housing 9 are determined essentially by the shaft W and the sleeve 2 surrounding the shaft W. The Housing 9 has in the region of the coil 6b radial projections 9a inwardly in the direction of the first coil 6a, so that the first coil 6a of the sleeve 2 and the second coil 6b of the housing 9 are coupled inductively in an optimal manner. Furthermore, the housing 9 openings O, through which the shaft W can pass. Housing 9 and shaft W are sealed in the region of the openings O by means of seals 10. The housing 9 can be formed in one piece as well as in two parts for improved maintenance or easier assembly of the device 1 on the shaft W.

Fig. 2c shows in a schematic form in plan view, the shaft W with a taper W _a in the central region of the shaft W. Directly adjacent to the taper W _a , the two mounting portions 3 of the sleeve 2 are arranged.

FIG. 2 d shows a cross section of the device 1 according to the invention, viewed along the axis of the shaft W. Radially from the inside to the outside is the structure as follows: Inside is the shaft W, on which the sleeve 2 is arranged coaxially. Coaxially on the sleeve 2, the first coil 6a is arranged. In order for the shaft W to rotate freely, a space Z is arranged between the first coil 6a and the second coil 6b arranged coaxially therewith, which space separates the second coil 6b from the first coil 6a. The second coil 6b is arranged on the inside of a housing 9 arranged axially to the shaft W and to the sleeve 2.

Fig. 3 shows a representation of the surface of the base of the device according to the first embodiment of the present invention shown in FIG. 1 in loaded and

unloaded conditions.

In Fig. 3a is a lateral surface of the cylindrical sleeve 2 according to the first

Embodiment of the present invention shown in plan view. The lateral surface of the sleeve 2 is oriented so that it corresponds to a lateral surface of a sleeve 2, which is arranged on a perpendicularly oriented shaft W according to FIG. 2.

Accordingly, the sleeve 2 according to FIG. 3a to 3c in its upper and lower region in each case three welding points 3a with which the sleeve 2 is fixed on the shaft W. Between the upper and lower three welding points 3a, the turns of the first coil 6a, which extend horizontally in FIGS. 3a to 3c, are arranged in the direction from top to bottom. The first coil 6a is with a

Electronic module 1 1 electrically connected, which is also arranged on the sleeve 2. The electronic component 1 1 is further connected to a Wheatstone bridge 5. The Wheatstone bridge 5 is advantageously located in the region of maximum elongation and / or compression on the bending beam 5 'between two mechanical

Structuring in the form of recesses 4, which are each formed in the form of a transverse S. The recesses 4 are mirror-symmetrical to each other and spaced apart from each other, so that the Wheatstone bridge 5 between two vertically arranged legs 4-i, 4 _{2 of} the recesses 4 is arranged. Between these two legs 4-i, 4 ₂ , a bending bar 5 'is formed, so that the

Wheatstone Bridge 5 can measure changes or displacements or other mechanical loads on the bending beam 5 '.

If the sleeve 2 is twisted in the direction R-1 (according to FIG. 3a from left to right), the shape of the bending beam 5 'on the sleeve 2 changes; the Wheatstone bridge 5 then generates a corresponding signal S, which finally by means of the coils 6a, 6b to a

Evaluation unit 13 is transmitted, which evaluates the corresponding torsion based on the transmitted signal S. In Fig. 3a, however, the bending beam 5 'can only be moved or bent so far, to opposite inner sides of the recess 4 abut each other. In this way, a stop A _{2 is} formed, that is, the opposite and internal vertical

extending sides of the central region of the transverse S touch each other. This overloading of the device 1 is avoided.

In Fig. 3b the now unloaded state is shown, whereas in Fig. 3c corresponding to Fig. 3a, a torsion of the sleeve 2 is shown in a direction R ₂ , which is opposite to the direction R-ι the torsion of FIG. 3a.

In Fig. 3c so that a corresponding stop A-ι analogous to the stop A _{2 is} formed. The torsion of the sleeve 2 takes place in FIGS. 3a to 3c between the upper and lower regions of the sleeve 2. FIGS. 4a to 4d show illustrations of the device according to the first embodiment of the present invention with different mechanical measuring structures.

FIGS. 4a to 4d show various measuring structures in the form of mechanical structuring or recesses 4 with bending bars 5 'of the sleeve 2, otherwise the structure of the sleeve 2 essentially corresponds to the sleeve 2 according to FIGS. 3a to 3c. The various measuring structures according to FIGS. 4a-4d serve for a mechanical strain relief of the bending beam 5 'when the torsion is applied.

In contrast to the recesses 4 according to FIG. 3b, the substantially S-shaped recess 4 of FIG. 4a has a sleeve projection 12 which extends in the vertical direction and is arranged in the lower region of the legs 4-i, 4 _{2 of} the recess 4 is. Protruding into the projection, the bending beam 5 'is formed, which is essentially circular in the region of the projection. In Fig. 4b, the legs 4i _t 4 _{2 of} the S-shaped recesses 4 are formed so that the bending beam 5 'arranged thereon Wheatstone bridge 5 in the vertical direction steadily but with a horizontal offset in Fig. 4b to the right and thus a mirror symmetry between the legs 4-i and 4 _{2 is} no longer present. In Fig. 4c, the bending beam 5 'is now oriented substantially in turn in the vertical direction of FIG. 4a. The bending beam 5 'has in this case in its central region two circular projections (in Fig. 4c oriented in the horizontal direction), so that the bending beam 5' is widened in its center in the horizontal direction of FIG. 4c.

At the same time, a further recess is arranged inside this widening.

Finally, another possible embodiment of a bending beam 5 'is shown in FIG. 4d. The bending beam 5 'has terminal widenings, in which in turn a recess is arranged. The bending beam 5 'surrounding legs 4-i, 4 _{2 of} the transverse S-shaped recesses 4 are corresponding to the shape of the

Bending beam 5 'formed, that is, the recesses 4 are substantially in

Region of the bending beam 5 'formed in a quarter circle and extend in the central region of the bending beam 5' parallel to this. The Wheatstone bridge 5 is arranged centrally on the bending beam 5 ', whereas the electronic component 1 1 is arranged in the region of the sleeve 2 adjacent to the leg 4-i of the recess.

Fig. 5 is a block diagram of an apparatus according to the first embodiment of the present invention.

The measuring structure 4, 5 'measures the torsions by means of a Wheatstone bridge 5. The Wheatstone bridge 5 is connected to an electronic module 1 1, the signal amplifier 1 1 a, an analog-to-digital converter 1 1 b, a Logic circuit 1 1 c and a Radio frequency modulator / demodulator includes. This electronic component 1 1 is connected to an inductance in the form of a first coil 6a, which is inductively coupled to a second coil 6b. The second coil 6b is further connected to an evaluation unit 13, which has a power source 13a, a logic circuit 13c and a high-frequency modulator / demodulator 13d and for evaluating the transmitted signal from the Wheatstone bridge 5 for determining the torque at torsion of Shaft W or the sleeve 2 is used. At the same time of the evaluation unit 13 by means of the inductive coupling electrical energy to the signal amplifier 1 1 a and the Wheatstone bridge 5 and to the electronic module 1 1 transmitted for their operation, so that on the sleeve 2 no separate power source for the operation of the device must be arranged.

Fig. 6a to 6c shows a device according to a second embodiment of the present invention in a transverse and plan view.

FIG. 6 shows a second embodiment of the device according to the invention. In contrast to the device according to FIGS. 1 and 2, in particular FIG. 2 b, the sleeve 2 has a radially projecting edge region V, that is to say the sleeve 2 has a T-shaped cross-section as shown in FIG. The edge region V is in the

Area 3 for fixing the sleeve 2 on the shaft W arranged. Also in the

In contrast to FIG. 2, the housing 9 is correspondingly T-shaped. Another difference to the device according to FIG. 2b is that the coils 6a, 6b are arranged in printed circuit on circuit boards 14a, 14b, so that they now provide an inductive coupling K parallel to the axis of the shaft W, in contrast to the inductive one Coupling according to FIG. 2, in which the inductive coupling K is effected perpendicular to the axis of the shaft W.

6b shows the edge region V of the sleeve 2 in a plan view with a viewing direction along the axis of the sleeve 2. The circular edge region V in this case has recesses 15 which are used to arrange electronic components, for example the

Electronic modules 1 1, etc. can be used. In Fig. 6c is further shown in a plan view from above of FIG. 6b, the first coil 6a with their windings, which is arranged on the printed circuit board 14a or printed on this. Fig. 7 shows a shaft with a device according to a third embodiment of the present invention. In Fig. 7, a partial wave W _{v is shown} with a sleeve-shaped device of FIG. 2b. In contrast to the wave W according to FIG. 2 _b , only a partial wave W _{v is} shown in FIG. 7, ie its extent along the axis of the device 1 is only slightly greater than the corresponding extent of the device 1. The partial wave W _v protrudes in each case over the housing 9 in the vertical direction and has outside the housing 9 of the device 1 connections V-ι, V ₂ , to connect the partial wave W _v to an external shaft W can. The connection V-1 is, for example, a

Threaded connection formed with internal thread, whereas the connection V _{2 is formed} as a screw connection with an external thread. In this way, as desired, the partial wave W _{v can be installed} together with the device 1 arranged on it at various locations, for example within a steering linkage of a vehicle. Fig. 8a, b shows an apparatus according to a fourth embodiment of the present invention.

In Fig. 8a, a lateral surface of the sleeve 2 is shown analogous to FIG. 3b. As in FIG. 3b, this has welding points 3a at the upper and lower edges, with which the sleeve 2 can be fixed on a shaft. Furthermore, an electronic component 1 1 is arranged, which is electrically connected to a coil 6a. In contrast to FIG. 3b, no Wheatstone bridge 5 is arranged directly on the bending beam 5 ', but the bending beam 5' comprises a region B _M , in particular in the form of a recess, in which a module M, which comprises a Wheatstone bridge 5, for example , is definable. For this purpose, the area B _{M is provided} at the upper and lower end according to Figure 8a with areas 3 _M , with which a module M can be fixed to the sleeve, for example by means

Welding. In order to enable an electrical connection between module M and electronic module 1 1, above the area 3 _M for fixing the module M contacts in the form of bond pads K are arranged. These contacts are electrically connected to the electronic module.

In Fig. 8b, the arrangement of a Wheatstone bridge 5 is now shown on a corresponding module M. The module M is set in the area B _M on the bending beam 5 '. The module M comprises a Wheatstone bridge 5 and four contacts in the form of bond pads K _M , which correspond to the corresponding contacts K. Between the contacts K, K _M a fixing area 3 _{M is} arranged. The contacts K, K _M become Therefore electrically connected by wire bonding D electrically. Subsequently, the module M together with wire bonds and contacts K _M , K can be passivated to protect against environmental influences. Fig. 9 shows a part of an apparatus according to the fourth embodiment of the present invention.

FIG. 9a shows in detail a module M according to FIG. 8b. The module M comprises a Wheatstone bridge 5 with four resistors W- ₁ , W ₂ , W ₃ , W ₄ . The Wheatstone bridge 5 is connected to the four contacts of the module K _M via corresponding lines. The resistors W- ₁ , W ₂ , W ₃ , W ₄ are piezo-resistive and are in

Thin-film technology, for example by means of chemical vapor deposition, applied to the module M. The resistors W- ₁ , W ₂ , W ₃ , W ₄ are made of NiCrSi, for example, and have a meandering design.

FIG. 9b shows a cross-section of the module according to FIG. 9a. At the edges of the module M, the fixing areas 3 _{M of} the module M are shown on a sleeve 2, whereas in the middle of the module M the Wheatstone bridge 5 is arranged. Fig. 10 shows a part of a method of manufacturing a device according to the fourth embodiment of the present invention.

In Fig. 10, reference numeral 20 denotes a steel suberbtrate. On the steel substrate 20, a multiplicity of modules M are now applied to the steel substrate 20 in thin-film technology analogously to the production of wafers in the semiconductor industry. The individual modules M are separated from one another by regions Ti, T ₂ . Along these areas Ti, T ₂ then takes place a separation of the modules M by means of laser, sawing, erosion or the like. In summary, the invention has the following advantages: On the one hand, the device requires little installation space due to the application of the measuring structures with already known and proven methods, such as, for example, the chemical

Vapor deposition. Furthermore, a measurement of torque by means

Device extremely reliable. At the same time, the contactless

Signal transmission of electrical energy through inductive coupling causes no friction, no noise and no wear. The device is still cost, since no expensive components such as magnets, Hall electronic components, etc. must be used. Likewise, the device is simple and inexpensive to produce. At the same time it is possible to ensure the reliability of the

To increase device considerably, for example by doubling the measuring structures on the sleeve.

Although the invention has been described above with reference to preferred embodiments, it is not limited thereto, but modifiable in many ways.

Claims

claims

1 . Device (1) for detecting a torque, comprising

a base (2),

at least one region (3) for fixing the device (1), in particular on a shaft (W, W _v ),

a strain-sensitive measuring structure (4, 5 '),

Measuring means (5) for generating a measuring signal (S) based on a change in the shape and / or position of the measuring structure (4,5 ') and

Means (6a, 6b) for transmitting the measurement signal (S).

2. Device according to claim 1, wherein

the measuring structure (4, 5 ') is mechanically structured and in particular

Recesses (4) and / or a bending beam (5 ') comprises.

3. Device according to at least one of claims 1 -2, wherein

the base (2) is sleeve-shaped.

4. Device according to at least one of claims 1 -3, wherein

the means (6a, 6b) are designed to transmit the measurement signal (S) for non-contact transmission of the measurement signal, and in particular to comprise inductive means, preferably in the form of at least one coil (6a, 6b).

5. Device according to at least one of claims 1 -4, wherein

the measuring structure (4, 5 ') is substantially meandering and / or bar-shaped.

6. Device according to at least one of claims 1-5, wherein

Means (4) for avoiding overloading of the device (1) are arranged, in particular in the form of at least one stop surface (Ai, A ₂ ).

7. Device according to at least one of claims 1-6, wherein the device (1) has a radially protruding edge region (V), wherein at least part of the measuring means (5) and / or the means (6a, 6b) for transmitting are arranged on the edge region (V).

Device according to at least one of claims 1-7, wherein

the device comprises a housing (9) in which, in particular, further means (6b) for transmitting measurement signals (S) are arranged.

Method for producing a device for measuring a torque, in particular according to at least one of claims 1 to 8, comprising the steps of arranging at least one strain-sensitive measuring structure (4, 5 ') on a base (2),

Arranging measuring means (5) for generating a measuring signal (S) based on a change in the shape and / or position of the measuring structure (4,5 ') at the base (2), arranging means for transmitting the measuring signal (S) at the base (2).

The method according to claim 9, wherein arranging measuring means (5) at the base (2) comprises the following steps:

Arranging measuring means (5), in particular a Wheatstone bridge, on a substrate, preferably a steel substrate (20),

Separating at least one module (M), comprising the measuring means (5) and a part of the substrate (20),

Set the module (M) on the base (2), as well

Contacting the module (M), in particular by wire bonding (D).

Shaft (W _v ) with a device (1) according to at least one of claims 1 -8, wherein the device (1) on at least a portion of the shaft (W _v ) is fixed and the shaft (W _v ) means (V-ι , V ₂ ) for connection to an external shaft (W).

Use of a device according to at least one of claims 1-8 for detecting a torque.