Device with magnetorheological transmission device

Abstract

The device (100) comprises a magnetorheological transmission device (10) having two rotating parts (20, 30) that can move relative to each other. An effective gap (5) is formed between the rotating parts (20, 30), in which a magnetorheological medium (6) is arranged. An electric coil device (26) is used to generate a controllable magnetic field in the effective gap (5) in order to influence the rotatability of the rotating parts (20, 30) during normal operation. The rotating parts (20, 30) are accommodated in a manner that allows them to rotate relative to a stationary part (4). The stationary part (4) has a coil receptacle (23) in which the coil device (26) is accommodated.

Description

Technical Field

[0001] The invention relates to a device having at least one magnetorheological transmission device with at least two rotating parts that can move relative to each other. At least one active gap is formed between the rotating parts, in which a magnetorheological medium is arranged. A controllable magnetic field can be generated in the active gap by means of at least one electric coil arrangement. Background Art

[0002] Such devices can be of various types and can be used, for example, as a steering presetting device for presetting steering movements according to the steer-by-wire concept. Generally, the device should be able to transmit high torques and at the same time have a low base torque. It is generally required that the device can be coupled to the driver or output of the drive train in a structurally simple manner and at the same time with a small amount of installation space. The connection to the supply and control lines should also be possible as simply as possible and at the same time reliably. Summary of the invention

[0003] It is therefore an object of the present invention to provide an improved device for use which particularly advantageously meets the requirements discussed above.

[0004] This object is achieved by a device having the features of claim 1. Preferred developments of the invention are the subject matter of the dependent claims. Further advantages and features of the invention emerge from the general description and from the description of an exemplary embodiment.

[0005] The device according to the present invention comprises at least one magnetorheological transmission device. The magnetorheological transmission device comprises at least two rotating parts that can move relative to each other. At least one action gap is constructed between the rotating parts. At least one magnetorheological medium is arranged in the action gap. The device comprises at least one electric coil device for generating a controllable magnetic field in the action gap. In particular, the generation of the magnetic field is used to influence (and preferably brake or release) the rotatability of the rotating part during normal operation. Here, the rotating part is accommodated in a manner that it can rotate relative to the stationary part. In particular, the device comprises at least one stationary part. The stationary part has at least one coil receptacle. The at least one coil device is accommodated and in particular fixed at the at least one coil receptacle. In particular, the coil device is not accommodated at the rotating part. In particular, the coil device is only accommodated at the stationary part.

[0006] The device according to the invention offers numerous advantages. The rotatable arrangement of the stationary component with its coil receptacle and the rotating component relative to the stationary component offers significant advantages. This allows the device to be structurally integrated into the drive train in a particularly simple and at the same time very space-saving manner. Likewise, the supply and control lines for the coil arrangement can be laid particularly easily and, for example, without sliding contacts or winding springs.

[0007] In all embodiments, it is preferred and advantageous if the rotating part and the stationary part are arranged coaxially with respect to one another and in particular with respect to the axis of rotation of the transmission device. Preferably, one of the rotating parts, the so-called embedded rotating part, is arranged at least partially (viewed in the radial direction) between the stationary part and the other rotating part, the so-called sealing rotating part. In particular, the embedded rotating part is arranged at least partially (viewed in the radial direction) between the stationary part and the sealing rotating part.

[0008] In particular, the action gap (viewed in the radial direction) is formed between the rotating parts. In particular, the action gap is arranged circumferentially (or annularly) between the rotating parts. In particular, the action gap is arranged coaxially with respect to the rotation axis of the rotating part and the stationary part and / or the transmission device. In particular, the action gap is designed annularly.

[0009] In an advantageous embodiment, the magnetic field of the coil arrangement extends through a magnetic circuit. Preferably, the magnetic circuit is provided by at least a stationary component and a rotating component. In particular, the magnetic circuit is provided by the stationary component and the embedded rotating component and the sealing rotating component and in particular by a magnetorheological medium located in the active gap. In particular, the magnetic field of the coil arrangement extends in the magnetic circuit through the stationary component (and through the decoupling gap), through the embedded rotating component, through the active gap and through the sealing rotating component.

[0010] In the magnetic circuit, the field lines run parallel to one another at least in sections. In particular, the magnetic circuit has a uniform distribution of the field lines (in particular compared to the field lines in air). In particular, the magnetic field flows through the closed magnetic circuit.

[0011] In an advantageous and preferred embodiment, the stationary component is arranged coaxially inside the rotating component. However, it is also possible and advantageous that the stationary component is arranged coaxially outside the rotating component.

[0012] In particular, the stationary component or the sealing rotating component is fastened (in particular in a rotationally fixed manner) to at least one torque support. In particular, the torque support is a bearing structure (also referred to as a load-bearing structure) and, for example, a part of a vehicle body or a control console, etc. If the sealing rotating component is fastened to the torque support, the stationary component is, for example, connected to an operating element and, for example, to a steering unit or a steering wheel, etc. The stationary component is then designed to be, in particular, stationary (in some cases, immovable) relative to the operating element.

[0013] The device is preferably designed as a steering presetting device for presetting a steering movement according to a steer-by-wire concept or as an operating device for setting an operating state by means of a rotational movement.

[0014] It is feasible and preferred that the embedded rotating part is coupled to a drive device and can be driven in particular by the drive device. Preferably, the magnetic field can be controlled in the effective gap in such a way that the embedded rotating part can drive the rotating part that has a sealing effect. This allows the device to be integrated into the power transmission system in a particularly simple and reliable manner. The embedded rotating part can be driven by the drive device directly or indirectly (for example via a transmission device). The transmission device can be designed to be self-locking, for example as a worm gear transmission (Schneckengetriebe) or the like. In this design, the transmission device is designed, for example, as a coupling device. In particular, the transmission device is then connected in series with the drive device in the power transmission system.

[0015] In an advantageous development, the sealing rotating part or the stationary part is coupled to the operating element (in particular in a torque-proof manner). The operating element is, for example, a steering unit or a steering wheel. In particular, the part not fixed to the torque support is coupled to the operating element. In particular, the magnetic field can be controlled in the action gap in such a way that a torque applied to the operating element can be transferred to the embedded rotating part.

[0016] In particular, at least one decoupling gap is formed at least partially between the stationary component and the embedded rotating component. In particular, the magnetic field of the coil arrangement also extends through the decoupling gap. In particular, the magnetic circuit also extends through the decoupling gap. In the region of the decoupling gap, the stationary component and the embedded rotating component are arranged opposite each other, in particular at a distance. The stationary component and the embedded rotating component can be located adjacent to each other in a (gap) fit in the region of the decoupling gap. In all embodiments, it is preferred that the stationary component and the embedded rotating component are not fixed to each other in a rotationally fixed manner.

[0017] The decoupling gap and the active gap are preferably arranged coaxially with respect to one another at least in sections. In particular, the decoupling gap and the active gap are sealed from one another by at least one sealing device and preferably by at least one first gap seal. The first gap seal extends in particular between the stationary component and the embedded rotating component. In particular, due to the sealing, the magnetorheological medium cannot enter from the active gap into the decoupling gap.

[0018] In particular, the magnetic circuit extends from the stationary component through a decoupling gap into the embedded rotating component, from there through an effective gap with a magnetorheological medium located therein, from there into the rotating component that has a closed effect, from there back through the effective gap with the magnetorheological medium located therein, from there into the embedded rotating component again and from there back through the decoupling gap into the stationary component again (to the starting point).

[0019] In the embedded rotating part, the magnetic circuit extends in particular through two zones (sometimes referred to as ranges) which are spaced apart from each other. The zones have opposite flow directions. In particular, one zone has a flow direction from the stationary part in the direction of the rotating part having a sealing effect. In particular, the other zone has a flow direction from the rotating part having a sealing effect in the direction of the stationary part. In particular, the zones are each provided by a guide section. In particular, an obstruction section is arranged between the zones. The guide section and the obstruction section are described in more detail below.

[0020] Preferably, the magnetic circuit extends from the stationary component through the decoupling gap into a guide section of the embedded rotating component, from there through the active gap with the magnetorheological medium located therein, from there into the closed rotating component (directly or without a further inflow into the closed rotating component), from there back through the active gap with the magnetorheological medium located therein, from there through another guide section of the embedded rotating component, and from there back again into the stationary component (to the starting point) through the decoupling gap. In particular, the closed rotating component serves to close the magnetic circuit between the guide sections. In particular, the magnetic circuit extends along its course through the closed rotating component only once. In particular, the magnetic circuit extends along its course through the embedded rotating component only once in each flow direction.

[0021] In particular, the embedded rotating part has at least two guide sections and at least one obstruction section arranged between the guide sections. In particular, the obstruction section is suitable for and configured to prevent magnetic short circuits between the guide sections. Preventing magnetic short circuits particularly relates to the magnetic field of the coil device or the magnetic circuit through which the magnetic field of the coil device extends. In particular, the obstruction section has a higher magnetic resistance than the guide section. For example, this can be achieved by the material properties and / or geometric properties (especially shape and height or thickness) of the embedded rotating part and / or by integrating a magnetic flux barrier into the embedded rotating part. The flux barrier particularly includes a gap, which is (especially) filled with air and / or a material with a lower magnetic conductivity than the embedded rotating part. The obstruction section and the guide section can be connected to each other in one piece (material one piece). For example, the guide section and the obstruction section then form a (one-piece) matrix. The obstruction section and the guide section can also be separate (but preferably firmly connected to each other) components. In particular, the guide section at least partially has a profile extending into the effective gap, thereby generating a variable gap height in the circumferential direction. The contour is preferably designed as a star-shaped contour or the like.

[0022] In particular, the obstructing section offers a higher magnetic resistance to the magnetic flux of the magnetic circuit than the guiding section. In particular, the obstructing section prevents the magnetic circuit from extending from one guiding section (via an embedded rotating part) to another guiding section directly or by bypassing an active gap and / or a rotating part with a closed effect. In other words, the obstructing section counteracts magnetic short circuits within the magnetic circuit. In particular, the obstructing section and the guiding section and the active gap and the rotating part with a closed effect are constructed and arranged relative to each other in such a way that the magnetic flux of the magnetic circuit is forced to flow from one guiding section first through the active gap and then through the rotating part with a closed effect and then again through the active gap and then through the other guiding section.

[0023] The effective gap is preferably sealed by means of at least one sealing device and preferably by means of at least one second gap seal. In particular, the second gap seal extends between the rotating parts.

[0024] In an advantageous development, the device comprises at least one fault protection system. In particular, the fault protection system is suitable and designed to generate a magnetic field by means of at least one magnetic field generating device and to influence a magnetorheological medium arranged in the active gap by means of the magnetic field, so that in the event of a fault, the rotatability of at least one of the rotating parts, in particular at least the rotating part having a blocking effect, is braked by means of a fault braking torque.

[0025] In the context of the present invention, a fault is understood to be in particular a stoppage of the coil arrangement. In particular, a stoppage of the magnetic field of the coil arrangement occurs here. The fault protection system is used in particular to ensure that the rotating part cannot be blocked or moved without resistance in the event of a fault.

[0026] In particular, the fault protection system is suitable and designed to at least partially replace and / or support the magnetic field of the coil arrangement by the magnetic field of the magnetic field generating device. In particular, the magnetic field generating device can provide a magnetic field when the magnetic field of the coil arrangement is interrupted in the event of a fault. In particular, the magnetic field generating device can provide a magnetic field that supports the magnetic field of the coil arrangement in normal operation and / or weakens the magnetic field of the coil arrangement in the event of a fault.

[0027] In particular, the fault device is suitable and configured to detect a fault and in particular a stoppage of the coil arrangement (e.g. using a sensor device). In particular, the fault protection system is suitable and configured to automatically brake the rotatability of the rotating component using a fault braking torque when a fault is detected. A circuit can be provided which automatically activates the additional coil arrangement in order to brake using a fault braking torque when the current supply of the coil arrangement stops functioning.

[0028] In particular, the magnetic field generating device is at least partially arranged and preferably fixed to the stationary component. This is possible and advantageous, for example, for an electrical additional coil arrangement of the magnetic field generating device. The magnetic field generating device can also be at least partially arranged on one of the rotating components. This is possible and advantageous, for example, for a permanent magnet arrangement of the magnetic field generating device.

[0029] Preferably and advantageously, the magnetic field generating device comprises at least one electrical additional coil device for generating a magnetic field (in particular in the active gap and / or in the gap of the failsafe system). In particular, the additional coil device is arranged in a coil receptacle of the stationary component.

[0030] The coil receiving portion can respectively have at least one separate receiving space for the coil arrangement and the additional coil arrangement. In particular, the receiving spaces are spatially separated. In particular, at least one partition wall is arranged between them, which is preferably designed to be magnetically conductive. It is also possible and advantageous for the coil receiving portion to have at least one common receiving space for the coil arrangement and the additional coil arrangement.

[0031] The coil arrangement and the additional coil arrangement can be wound axially side by side or coaxially with each other in a common receiving space. For example, the additional coil arrangement is then arranged radially inside and surrounded by the coil arrangement in the circumferential direction. The opposite arrangement is also possible. It is also possible and advantageous for the coil arrangement and the additional coil arrangement to be wound with each other in a common receiving space. The electrical conductors of the two coil arrangements are then arranged to be thoroughly intermixed, so to speak.

[0032] It is possible and advantageous that the magnetic field generating device comprises at least one permanent magnet device for providing a magnetic field. In particular, the fault protection system is suitable and designed to weaken or eliminate the magnetic field of the permanent magnet device during normal operation by a magnetic field that acts in a targeted manner against the magnetic field of the permanent magnet device. Such a permanent magnet device has the advantage that a magnetic field for a fault braking torque is automatically prepared when the current supply of the coil device stops running. Sensor devices or circuits for detecting faults can be omitted if necessary.

[0033] In particular, the failsafe system is suitable and designed to generate a counteracting magnetic field by means of a coil arrangement and / or by means of an additional coil arrangement.

[0034] It is possible that the permanent magnet device is provided by a component with magnetic remanence properties (so-called remanence devices). Due to the remanence properties, the component retains the respective magnetic state permanently, or at least for such a long time that it is demagnetized or magnetized again. Such a component can be magnetized or demagnetized as required by means of a coil device and / or an additional coil device. The component is, for example, one of the rotating parts and / or a stationary part or a section thereof.

[0035] Preferably, the fault protection system is associated with at least one gap with a magnetorheological medium. In particular, the gap is constructed at least in sections between the stationary component and the rotating component that has a sealing effect. The gap is preferably connected to the active gap. The active gap can transition into the gap. In particular, no seal is provided between the gap of the fault protection system and the active gap of the transmission device. However, at least one sealing device can also be arranged between the gap and the active gap.

[0036] It is also possible and advantageous that the gap is provided by the gap of the transmission device. In other words, the fault protection system utilizes the effective gap of the transmission device. In particular, the same magnetorheological medium is then provided for the fault protection system and the transmission device.

[0037] In a particularly advantageous embodiment, no embedded rotating parts are provided in the gap extension of the failsafe system. This is particularly advantageous when the magnetic field generating device and, for example, the additional coil device are formed on the stationary component. As a result, embedded rotating parts can be omitted in the area of ​​the failsafe system, thereby saving weight and installation space.

[0038] In particular, in the gap configuration of the fault protection system, the stationary component and the locking rotating component (directly or indirectly) are at least partially opposite each other, without the embedded rotating component being located between them. As a result, in the event of a fault, the locking rotating component can brake directly at the stationary component. In particular, the gap is at least partially not limited by the embedded rotating component.

[0039] Preferably, the fail-safe system brakes the rotatability of the locking rotating component relative to the stationary component. It is also possible and preferred that the fail-safe system brakes the rotatability of the rotating component and the stationary component relative to each other.

[0040] In particular, the embedded rotating part is rotatably supported on the stationary part. In particular, the sealing rotating part is rotatably supported on the embedded rotating part and / or the stationary part. Alternatively or additionally, the rotating part and / or the stationary part can also be rotatably supported on other suitable components and, for example, on a torque support or a bearing structure.

[0041] The rotating part and the stationary rotating part are arranged in particular coaxially with each other and / or coaxially with the axis of rotation of the transmission device. The magnetically permeable area of ​​the rotating part and / or the stationary rotating part can be equipped with a profile extending into the active gap. By means of this profile, a variable gap height in the circumferential direction can be obtained. The profile can be configured as a star-shaped profile, etc. In particular, the supply line and / or the control line extends through the stationary rotating part.

[0042] In particular, the embedded rotating part adjoins both the sealing rotating part and the stationary rotating part. In particular, no rotating part is arranged inside another rotating part. In particular, no rotating part is surrounded by another rotating part. In particular, the decoupling gap has no contact with the sealing rotating part. In particular, the sealing rotating part has no contact with the decoupling gap.

[0043] In particular, the embedded rotating component limits the decoupling gap together with the stationary component. In particular, the decoupling gap extends only between the embedded rotating component and the stationary component. In particular, the decoupling gap does not extend between the embedded rotating component and the rotating component with a sealing effect. In particular, the embedded rotating component is directly surrounded by the decoupling gap radially inwards and is surrounded by the stationary component directly after the decoupling gap. In particular, the embedded rotating component is directly surrounded by the action gap radially outwards and by the rotating component with a sealing effect. In particular, the embedded rotating component is surrounded by the rotating component with a sealing effect either radially outwards or radially inwards. In particular, the embedded rotating component is not surrounded by the rotating component with a sealing effect radially outwards and radially inwards. The decoupling gap is preferably sealed relative to the action gap in order to prevent the magnetorheological medium from entering the decoupling gap.

[0044] In particular, the force transmission or torque transmission can be changed in a targeted manner using the transmission device. In particular, the force transmission or torque transmission between the rotating parts can be set by means of the coil device and its magnetic field in the action gap. In particular, a change in the movement resistance to the rotatability of the rotating parts is also obtained from this. The transmission device can be used as a coupling device or as a braking device. Then, the rotating part is used in particular as a coupling part or a braking part and can be called a coupling part or a braking part. The torque can also be called a braking torque or a coupling torque. The device can be configured as an operating device for setting an operating state by means of a rotational movement and / or a linear movement (which is converted into a rotational movement). In particular, the movement resistance of the rotational movement can be set in a targeted manner.

[0045] In all embodiments, it is preferred that the magnetorheological medium comprises a gas as a filling medium and magnetorheological particles. In particular, the magnetorheological particles are contained in air. In particular, the magnetorheological medium is configured as a powder. With such a magnetorheological medium, the invention presented here can achieve a particularly low basic torque. Alternatively, it is conceivable and feasible that the magnetorheological medium comprises magnetorheological particles and a carrier fluid, such as oil, water or alcohol.

[0046] It is particularly preferred that the magnetorheological particles consist (respectively) essentially of carbonyl iron powder or a derivative thereof. Other magnetorheologically responsive particles are also possible. The magnetorheological particles can have a coating and / or additional components for protection against wear and / or corrosion, so that the magnetorheological particles are designed to be more durable, more wear-resistant and / or have better sliding properties during operation. The magnetorheological medium and / or the magnetorheological particles can, for example, include graphite additives.

[0047] In the context of the present invention, non-magnetically permeable materials are to be understood in particular as materials with a magnetic permeability value of less than 10 and preferably less than 1. In this context, magnetically permeable materials are to be understood in particular as materials with a magnetic permeability value of greater than 10 and preferably ferromagnetic substances. Sometimes called magnetic permeability) is the "relative magnetic permeability", which is also simply called "magnetic permeability". BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Further advantages and features of the invention emerge from the exemplary embodiments explained below with reference to the drawings.

[0049] in:

[0050] Figure 1 A purely schematic diagram of the device according to the invention is shown in a cut-away side view;

[0051] Figure 2 Another device is shown in a cut-away side view; and

[0052] Figure 3A further device is shown in a cut-away side view. DETAILED DESCRIPTION

[0053] Figure 1 The device 100 according to the invention is shown with a magnetorheological transmission device 10 with two rotating parts 20, 30 that can rotate relative to each other. The rotating parts 20, 30 are accommodated so that they can rotate relative to the stationary part 4. For reasons of clarity, the dimensions or ratios here and in the other figures are purely schematic and in particular not drawn to scale.

[0054] The rotating parts 20, 30 and the stationary part 4 are arranged coaxially with each other and with the axis of rotation of the transmission device 10. One of the rotating parts 20, the so-called embedded rotating part 20, is arranged here (viewed in the radial direction) between the stationary part 4 and the other rotating part 30, the so-called sealing rotating part 30.

[0055] Between the rotating parts 20, 30, a circumferential active gap 5 (not drawn to scale for better clarity) is formed, in which a magnetorheological medium 6 is arranged. The stationary part 4 has a coil receptacle 23 with a receiving space 23a, in which an electric coil arrangement 26 is received. The coil arrangement 26 generates a magnetic field, which influences the medium 6 so that the mobility of the rotating parts 20, 30 relative to each other can be loaded with a targeted torque. Since the part 4 is stationary, a reliable energy supply of the coil arrangement 26 can be realized particularly simply and reliably. No sliding contacts or winding springs are required.

[0056] The magnetic field of the coil arrangement 26 here extends through the magnetic circuit (drawn in dashed lines) provided by the stationary component 4 and the rotating components 20, 30. Here, the magnetic field of the coil arrangement 26 extends in the magnetic circuit through the stationary component 4, further through the decoupling gap 34 and through the embedded rotating component 20, and further through the active gap 5 and the medium 6 located therein, and through the closing rotating component 30 and back again.

[0057] The isolating gap 34 and the operating gap 5 are sealed from one another by a first gap seal 17 , which extends between the stationary component 4 and the inserted rotating component 20 . The operating gap 5 is also sealed by a second gap seal 27 .

[0058] Here, the stationary component 4 is held in a rotationally fixed manner on the torque support 303 and, for example, on a bearing structure 313 (control console, vehicle body, etc.). Here, purely by way of example, the operating element 341 is fastened to the closing rotating component 30. In an alternative and equally advantageous embodiment, the operating element 341 can also be fastened to the stationary component 4, while the closing rotating component 30 is fastened in a rotationally fixed manner to the torque support 303.

[0059] The embedded rotating part 20 can be driven by a drive device 302, which is not shown in more detail here. The transmission device 10 is connected in series with the drive device 302 in the drive train, so that, for example, the power flow (Kraftfluss, sometimes called force flow) between the drive device 302 and the operating element 341 can be changed in a targeted manner. The drive device 302 can be connected to the embedded rotating part 20 via a (self-locking) transmission. If the transmission device 10 is connected in series between the driver and the driven device in this way or in a similar way, it can also be called a coupling device 1.

[0060] The rotating part 30 here has a sleeve section 33 and two axial end sections 43. The component 4 here has a base body 14 and an axial continuation 24 for connecting to the torque support 303. The rotating part 20 is equipped with a magnetically conductive guide section 42. In the region of the guide section 42, the gap 5 can have a variable gap height in the circumferential direction. For this purpose, the guide section 42 is configured, for example, as a star-shaped profile or the like.

[0061] As can be clearly seen here, the magnetic circuit runs through the guide sections 42. Disposed here between the guide sections 42 are blocking sections 52 which have a higher magnetic resistance than the guide sections 42. This prevents a magnetic short circuit from occurring in the rotating part 20.

[0062] The rotating part 20 can be implemented in one piece of material here. That is, the guide section 42 and the obstruction section 52 can be made of the same material. In this case, in order to prevent a magnetic short circuit from occurring through the obstruction section 52, the obstruction section 52 can be designed in terms of geometry so that only a small portion of the magnetic field is guided through the obstruction section, while the majority of the magnetic field is guided through the guide section 42 in the radial direction. For example, the radial wall thickness of the rotating part 20 can be thinner in the area between the guide sections 42 than in the area of ​​the guide sections 42. Distributed on the circumference, recesses can be provided between the guide sections 42 (or the obstruction sections 52), which (further) reduce the magnetic permeability. The recesses can be at least partially filled with a filling material (e.g., a synthetic resin) with poor magnetic conductivity.

[0063] The device 100 is here, for example, an operating device. For this purpose, the operating element 341 is, for example, a knob or a joystick or the like. Then, during the turning of the knob to set the operating state, the transmission device 10 generates tactile feedback. For example, an active reset can be achieved via a drive. However, the device 100 can, for example, also be configured as a steering preset device 300, as described in reference thereto. Figure 2 and Figure 3 As described in more detail, the transmission device 10 is then used, for example, as an actuator in a steering wheel of a steer-by-wire unit of a vehicle or a game console.

[0064] Figure 2 The device 100 for controlling a vehicle according to the steer-by-wire concept is shown as a steering presetting device 300. For this purpose, the operating element 341 is designed here as a steering unit 301 and, for example, as a steering wheel 311. The movement or position and / or torque of the steering unit 301 is detected here by means of a sensor device 70, not shown in greater detail, and, for example, by means of a rotation angle sensor or a torque sensor or a combination of both.

[0065] The steering unit 301 is integrated here into a drive train 310, which also includes a drive device 302 with an electric drive motor and a magnetorheological coupling device 1 with coupling parts 2, 3. The coupling device 1 and its coupling parts 2, 3 are provided by the transmission device 10 and its rotating parts 20, 30. The embedded rotating part 20 can be referred to as the inner coupling part 2 and the sealing rotating part 30 can be referred to as the outer coupling part 3. The transmission device 10 is designed here in a similar way to the above description with regard to its functional principle.

[0066] The drive 302 is connected to the inner coupling part 2 via a transmission 304, which is configured here as a worm gear. For this purpose, the worm wheel 344 is connected to the coupling part 2 in a rotationally fixed manner. Thus, the self-locking effect of the worm gear 334 acts on the inner coupling part 2.

[0067] By means of the arrangement of the coil arrangement 26 shown here, its magnetic field extends through the stationary component 4 and through the decoupling gap 34 and through the conductive guide section 42 of the inner coupling part 2, and further through the gap 5 and finally through the (conductively designed) outer coupling part 3. The magnetic circuit here therefore extends through three components 2, 3, 4 that can rotate relative to each other and through two gaps 5, 34. The gap 5 and the decoupling gap 34 are sealed from each other here by means of the seal 17 arranged on the inner coupling part 2. In addition to the seal 17, the gap 5 and the decoupling gap 34 merge into each other here.

[0068] The steering presetting device 300 shown here is equipped with a failsafe system 305, which has a magnetic field generating device 345 for generating a magnetic field. By means of this magnetic field, the rotatability of the rotating parts 20, 30 can be braked with a fault braking torque in the event of a fault. The magnetic field generating device 345 here includes a (additional) coil device 426. In a variant, the coil device 426 can also be used to strengthen the magnetic field of the coil device 26 in normal operation.

[0069] The coil arrangement 426 is likewise accommodated in the stationary component 4. For this purpose, a separate receiving space 23b is formed in the base body 14. Here, the conductive section extending axially next to the coil arrangement 426 or next to the receiving space 23b can be designed, for example, as a star-shaped contour or the like.

[0070] In the area of ​​the coil device 426, the stationary component 4 and the outer coupling component 3 are directly opposite each other (there is no inner coupling component 2 between them here). The gap 405 provided for the coil device 426 is located directly between the component 4 and the outer coupling component 3. The gap 405 directly transitions into the gap 5, so that in principle a common gap 5, 405 is provided here for the coupling device 1 and the fault protection system 305. In the area of ​​the stationary component 4 adjacent to the coil device 426, the gap 405 can have a variable height. Thus, for example, a star-shaped profile similar to the conductive guide section 42 of the transmission device 10) is also obtained here.

[0071] Can save the complicated separation of two gaps with their own media.In addition, in the event of a fault, the braking effect is directly generated between the outer coupling component 3 (where the steering unit 101 is fixed) and the stationary component 4 (which is fixed to the support structure 313 in a rotationally fixed manner).

[0072] Figure 3 Shown is a reference Figure 2 The described variant of the steering presetting device 300 . In this case, the magnetic field generating device 345 is equipped with a permanent magnet device 325 . The permanent magnet device 325 is annular in design and is arranged on the stationary component 4 .

[0073] The magnetic field of the permanent magnet arrangement 325 can be compensated or weakened if necessary by means of the coil arrangement 26. Additionally or alternatively, an additional coil arrangement 426 can also be provided for this purpose. This is then accommodated together with the coil arrangement 26 in the receiving space 23a (so-called common receiving space), for example.

[0074] In a variant, coil arrangement 426 can generate an opposing magnetic field, which reduces or cancels the magnetic field of coil arrangement 26. It is advantageous here that the magnetic fields of coil arrangements 26, 426 are located in a common magnetic circuit. Thus, excessive current supply to coil arrangement 26 can be remedied in the event of a fault using additional coil arrangement 426.

[0075] Here, channel 44 can be clearly seen, which is formed in base body 14 and through which, for example, supply lines of coil arrangement 26 can be passed.

[0076] Reference Numbers List:

[0077] 1 Magnetorheological coupling device

[0078] 2,3 Connecting parts

[0079] 4 Components

[0080] 5 Clearance

[0081] 6 Medium

[0082] 10Transmission device

[0083] 17 Gap seal

[0084] 20 Rotating parts

[0085] 23 coil housing

[0086] 23a Accommodation space

[0087] 23b Accommodation space

[0088] 24 axial extension

[0089] 26 coil device

[0090] 27 Gap seal

[0091] 30 Rotating parts

[0092] 34 Decoupling gap

[0093] 36 Supply lines

[0094] 42 Boot Segment

[0095] 43 end side section

[0096] 44 channels

[0097] 52 Obstruction Section

[0098] 70 sensor devices

[0099] 100 devices

[0100] 300 turn preset device

[0101] 301 Steering Unit

[0102] 302 drive device

[0103] 303 torque support

[0104] 304 transmission

[0105] 305 Fault Protection System

[0106] 310 Powertrain

[0107] 311 Steering Wheel

[0108] 313 support structure

[0109] 325 Permanent Magnetic Device

[0110] 334 Worm gear transmission

[0111] 341 operating elements

[0112] 344 Worm gear

[0113] 345 Magnetic Field Generator

[0114] 405 Clearance

[0115] 426 Additional coil device

Claims

1. A device (100) comprising at least one magnetorheological transmission device (10) having at least two rotating parts (20, 30) movable relative to each other, wherein: At least one active gap (5) is formed between the rotating parts (20, 30), wherein a magnetorheological medium (6) is arranged in the active gap (5) and comprises at least one electric coil arrangement (26) for generating a controllable magnetic field in the active gap (5). It is characterized in that The rotating part (20, 30) is accommodated in a rotatable manner relative to the stationary part (4), and the stationary part (4) has at least one coil receptacle (23) in which the at least one coil arrangement (26) is accommodated.

2. The device (100) according to the preceding claim, wherein The rotating parts (20, 30) and the stationary part (4) are arranged coaxially with respect to one another, wherein one of the rotating parts (20, 30), the so-called embedded rotating part (20), is arranged at least partially between the stationary part (4) and the other of the rotating parts (20, 30), the so-called sealing rotating part (30).

3. The device (100) according to any one of the preceding claims, wherein: The magnetic field of the coil arrangement (26) extends through a magnetic circuit, wherein the magnetic circuit is provided at least by the stationary component (4) and the rotating component (20, 30).

4. The device (100) according to any one of the preceding claims, wherein: The stationary component (4) is arranged coaxially inside the rotating component (20, 30), or the stationary component (4) is arranged coaxially outside the rotating component (20, 30).

5. The device (100) according to any one of the preceding claims, wherein: The embedded rotating part (20) is coupled to a drive device (302) and can be driven by the drive device, and the magnetic field in the effective gap (5) can be controlled in such a way that the embedded rotating part (20) can drive the sealing rotating part (30).

6. The device (100) according to any one of the preceding claims, wherein: The stationary component (4) or the rotating component (30) having a sealing effect is fixed to the torque support (303).

7. The device (100) according to any one of the preceding claims, wherein: The locking rotating part (30) or the stationary part (4) is connected to an operating element (341), for example a deflection unit (301).

8. The device (100) according to any one of the preceding claims, wherein: An isolating gap (34) is formed at least in sections between the stationary component (4) and the engaged rotating component (20), wherein the magnetic field of the coil arrangement (26) also extends through the isolating gap (34).

9. The device (100) according to the preceding claim, wherein: The isolating gap (34) and the effective gap (5) are arranged coaxially with respect to one another at least in sections and are sealed with respect to one another by at least one first gap seal (17).

10. The device (100) according to any of the preceding claims and claim 3, wherein: The magnetic circuit extends from the stationary component (4) through the decoupling gap (34) into the embedded rotating component (20), from there through an active gap (5) with a magnetorheological medium (6) located therein, from there into the closed rotating component (30), from there back through the active gap (5) with a magnetorheological medium (6) located therein, from there into the embedded rotating component (20) again, and from there back through the decoupling gap (34) into the stationary component (4).

11. The device (100) according to any one of the preceding claims, wherein The embedded rotating component (20) has at least two guide sections (42) and at least one blocking section (52) arranged between the guide sections (42), wherein the blocking section (52) is suitable and configured to prevent a magnetic short circuit between the guide sections (42).

12. The device (100) according to any one of the preceding claims, wherein: The effective gap (5) is sealed by means of at least one second gap seal (27), wherein the second gap seal (27) extends between the rotating parts (20, 30).

13. The device (100) according to any of the preceding claims comprises at least one fault protection system (305), which is suitable for and constructed to generate a magnetic field with the aid of at least one magnetic field generating device (345) and thereby influence the magnetorheological medium (14) so ​​as to brake the rotatability of at least one of the rotating parts (20, 30) with a fault braking torque in the event of a fault.

14. The device (100) according to the preceding claim, wherein The magnetic field generating device (345) is at least partially arranged on the stationary component (4).

15. The device (100) according to any one of the two preceding claims, wherein: The magnetic field generating device (345) comprises at least one electrical additional coil device (426) for generating a magnetic field, wherein the additional coil device (426) is arranged in a coil receptacle (23) of the stationary component (4).

16. The device (100) according to any one of the three preceding claims, wherein: The magnetic field generating device (345) comprises at least one permanent magnet device (325) for providing a magnetic field, and wherein the fault protection system (305) is adapted and configured to weaken or eliminate the magnetic field of the permanent magnet device (325) by means of a resisting magnetic field during normal operation.

17. The device (100) according to any one of the four preceding claims, wherein: The fault protection system (325) is suitable and designed to generate a resistive magnetic field by means of the coil arrangement (26) of the transmission device (10) and / or by means of the additional coil arrangement (426).

18. The device (100) according to any one of the five preceding claims, wherein: The fault protection system (305) is associated with a gap (405) with a magnetorheological medium (6), wherein the gap (405) is formed between the stationary component (4) and the sealing rotating component (30), or wherein the gap (405) is provided by an effective gap (5) of the transmission device (10).

19. The device (100) according to any one of the six preceding claims, wherein: The fail-safe system (325) brakes the rotatability of the locking rotating part (30) relative to the stationary part (4), or the fail-safe system brakes the rotatability of the rotating parts (20, 30) relative to one another.

20. The device (100) according to any one of the preceding claims, wherein The embedded rotating part (20) is rotatably supported on the stationary part (4), and / or the sealing rotating part (30) is rotatably supported on the embedded rotating part (20) and / or on the stationary part (4).

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