DE102021132806A1 - Inductive magnet arrangement for a wheel suspension of a motor vehicle, wheel suspension and motor vehicle - Google Patents

Abstract

The present invention relates to an inductive magnet arrangement for a wheel suspension of a motor vehicle for generating electrical energy when compressing and/or rebounding a wheel, as well as a wheel suspension and a motor vehicle, the magnet arrangement having a first pair of permanent magnets with a first permanent magnet and a second permanent magnet and a first coil, wherein the second, inner permanent magnet is arranged concentrically to the first, outer permanent magnet and the first permanent magnet and the second permanent magnet can be pushed into one another with a defined air gap between them in the radial direction along a lifting axis, the coil being concentric to the first pair of permanent magnets is arranged and is designed in such a way that it can be arranged at least in sections with at least some of its windings in the air gap of the first pair of permanent magnets, the coil being movably mounted along the stroke axis and the magnet arrangement also having an adjustment device for adjusting a position of the coil along the Has lifting axis and the first coil is adjustable by means of the adjusting device along the lifting axis.

Description

The present invention relates to an inductive magnet arrangement for a wheel suspension of a motor vehicle for generating electrical energy when compressing and/or rebounding a wheel, the magnet arrangement having at least a first pair of permanent magnets with a first permanent magnet and a second permanent magnet and at least one first coil with a plurality has turns. The first permanent magnet has a recess in its center and forms an outer permanent magnet. The second permanent magnet forms an inner permanent magnet. One of the permanent magnets can be mechanically coupled to the vehicle body and the other permanent magnet to an associated wheel, the second, inner permanent magnet being arranged concentrically to the first, outer permanent magnet and the first permanent magnet and the second permanent magnet with a defined air gap between them in the radial direction a lifting axis can be pushed into each other. The coil is arranged concentrically to the first pair of permanent magnets and is designed in such a way that it can be arranged at least in sections with at least some of its turns in the air gap of the first pair of permanent magnets. The outer permanent magnet and the inner permanent magnet are polarized in such a way and can be arranged or arranged relative to the coil that electrical energy can be generated using the coil during a relative movement between the outer permanent magnet and the inner permanent magnet along the lifting axis.

Furthermore, the present invention relates to a wheel suspension for a vehicle and a motor vehicle, in particular a two-track motor vehicle, with a wheel suspension.

Inductive magnet arrangements for wheel suspensions for motor vehicles are known in principle from the prior art. In particular, inductive magnet arrangements for linear shock absorbers and corresponding shock absorbers with an inductive magnet arrangement are known from the prior art, for example from DE 10 2011 010 165 B4 , CN 201065906 Y or CN 201344225 Y .

An electromechanical rotary shock absorber with energy recovery is also known, see https://www.motorsport-total.com/auto/news/audi-entwicklungstossdaempfer-mit-energierueckgewinn-16081003, last accessed on 20/22/2021.

In such magnet arrangements, a first permanent magnet can generally be moved relative to a second permanent magnet and a coil, with the change in the magnetic field inducing an electrical voltage in the coil and thus electrical energy being generated or the mechanical kinetic energy of the first magnet being converted into electrical energy is converted. The associated coil is usually arranged in a stationary manner relative to the first magnet or the second magnet and is therefore not optimally positioned for each relative position of the first and second magnets, which has a disadvantageous effect on the efficiency of energy generation or energy conversion.

Against this background, it is an object of the present invention to provide an alternative inductive magnet arrangement for a wheel suspension, preferably an improved inductive magnet arrangement, in particular an inductive magnet arrangement for a wheel suspension, which in at least one operating state has improved efficiency compared to an inductive magnet arrangement with a coil , which is arranged stationary to the first permanent magnet or the second permanent magnet.

This object is achieved according to the invention by an inductive magnet arrangement according to claim 1, by a wheel suspension according to claim 12 and by a motor vehicle according to claim 13. Advantageous embodiments of the invention are the subject matter of the dependent patent claims, the description and the figures. The wording of the claims is made part of the content of the description by express reference.

An inductive magnet arrangement according to the invention for a wheel suspension of a motor vehicle for generating electrical energy when compressing and/or rebounding a wheel has at least a first pair of permanent magnets with a first permanent magnet and a second permanent magnet and at least one first coil with a large number of windings. The first permanent magnet has a recess at its center and forms an outer permanent magnet. The second permanent magnet forms an inner permanent magnet. One of the permanent magnets can be mechanically coupled to the vehicle body and the other permanent magnet to an associated wheel, with the smaller or lighter permanent magnet, in particular the second and inner permanent magnet, preferably being able to be coupled to the wheel in order to keep an unsprung mass as small as possible. The second, inner permanent magnet is arranged concentrically to the first, outer permanent magnet and the first permanent magnet and the second per Magnetic magnets can be pushed into one another along a stroke axis with a defined air gap between them in the radial direction, in particular with an air gap which has a constant gap width over the entire circumference. The coil is arranged concentrically to the first pair of permanent magnets and is designed in such a way that it can be arranged at least in sections with at least some of its turns in the air gap and thus in the radial direction between the inner permanent magnet and the outer permanent magnet of the first pair of permanent magnets. The outer permanent magnet and the inner permanent magnet are polarized in such a way and can be arranged or arranged relative to the coil in such a way that electrical energy can be generated with the help of the coil during a relative movement between the outer permanent magnet and the inner permanent magnet along the stroke axis, in particular an electrical voltage in the coil is inducible.

An inductive magnet arrangement according to the present invention is characterized in that the coil is mounted movably along the stroke axis and the magnet arrangement also has an adjusting device for adjusting a position of the coil along the stroke axis and the first coil can be adjusted along the stroke axis by means of the adjusting device.

As a result, i.e. due to the adjustable position of the coil along the stroke axis relative to the first permanent magnet and to the second permanent magnet, an advantageous position of the coil can be achieved in each case, in particular an optimal position of the coil in each case, as a result of which the efficiency of the magnet arrangement can be increased compared to a magnet arrangement with a fixed coil or a coil arranged in a stationary manner in relation to at least one of the magnets. As a result, more electrical energy can be generated or recovered and thus the range of an electrically powered vehicle can be extended (provided there is a corresponding energy storage device in the vehicle).

The coil is in particular designed without a magnetic core.

The first permanent magnet is preferably designed in the form of an annular disk or similar to an annular disk, and the recess, in particular a cylindrical recess.

The second magnet is preferably cylindrical or also annular disk-shaped or annular disk-like and its outer diameter is particularly preferably dimensioned such that an air gap with an advantageous gap width is set in the radial direction, into which the coil can be introduced without contact.

The expression “mechanically coupleable” in the context of the present invention means “directly or indirectly mechanically operatively connected”, with “directly” meaning without a further component in between and “indirectly” with or via a further component in between.

In an advantageous embodiment of a magnet arrangement according to the present invention, the magnet arrangement has at least one further permanent magnet pair designed analogously to the first permanent magnet pair and at least one further coil, the permanent magnets of the further permanent magnet pair preferably being concentric and spaced along the stroke axis from the first pair of permanent magnets are arranged and the further coil is arranged concentrically to the further pair of permanent magnets and is designed in such a way that at least some of its turns are in the air gap and thus in the radial direction between the inner permanent magnet and the outer permanent magnet of the further permanent magnet -pair can be arranged, and wherein the outer permanent magnet and the inner permanent magnet are polarized in such a way and can be or are arranged relative to the further coil in such a way that when there is a relative movement between the outer permanent magnet and the inner permanent magnet of the further permanent magnet pair along the lifting axis with the aid of the further coil electrical energy can be generated, in particular an electrical voltage can be induced in the further coil, wherein the further coil is also mounted movably along the lifting axis and its position along the lifting axis can be adjusted by means of the adjusting device.

The load capacity of the wheel suspension can be increased by the number of pairs of permanent magnets arranged one above the other.

The spring/damper effect can be improved by stronger magnetization of the outer magnet. For this purpose, the magnet arrangement can in particular additionally have a third permanent magnet, in particular a permanent magnet ring, which is arranged concentrically on the outside around the first permanent magnet and which is connected in particular analogously to the outer permanent magnet.

Alternatively or additionally, a magnet arrangement according to the invention can have a middle permanent magnet ring which, in particular in the radial direction, is between the inner permanent magnet and the outer permanent magnet Neten of a pair of permanent magnets is arranged, in particular each with a radial air gap in between. This middle permanent magnet ring is preferably designed in such a way, in particular magnetized or magnetizable and polarized in such a way, that it is held in its position by the magnetic forces, ie “floats”. The achievable spring deflection of the magnet arrangement can be adjusted by means of such a magnet. In particular, an extension of the spring deflection can be achieved, since the inner magnet can be deflected relative to the middle magnet in the lifting direction and the middle magnet can in turn be deflected relative to the outer magnet, which results in a greater overall deflection of the inner magnet relative to the outer magnet can until a maximum permissible deflection is reached.

In many cases it is advantageous, in particular for the precision of the magnet arrangement, if the magnet arrangement has at least one guide device, by means of which the moving components are guided in the direction of movement, for example the middle, “floating” magnet.

A magnet arrangement according to the invention can basically be designed as a spring, i.e. as a system that stores mechanical energy and generates a restoring force, or as a damper.

The magnet arrangement is preferably designed as a spring, with the permanent magnets preferably being poled and designed such that they are pushed into one another in an unloaded state, with the two magnets of the first pair of permanent magnets being located in one plane in the unloaded state. This means that when the magnet arrangement is in an unloaded state, the inner permanent magnet is preferably located in the recess of the first, outer permanent magnet. For this purpose, the two first and second permanent magnets are particularly preferably of opposite polarity, so that they attract each other and in an unloaded state, i.e. when the magnetic force is not counteracted by any load, slide into one another.

However, the magnet arrangement can also be designed as a damper, in which case the permanent magnets are preferably poled and designed in such a way that they repel each other in an unloaded state, so that they repel each other in an unloaded state, i.e. when the magnetic force is not counteracted by any load , push apart.

A magnet arrangement according to the invention can also be designed as a so-called spring strut or damper strut and combine both functions (suspension and damping).

Furthermore, the magnet arrangement can have one or more stop buffers.

In a further advantageous embodiment of a magnet arrangement according to the present invention, the outer permanent magnet and the inner permanent magnet of at least one permanent magnet pair each have a magnetic north pole and at least one magnetic south pole. Furthermore, the outer permanent magnet and the inner permanent magnet are preferably arranged relative to one another in such a way that different poles are arranged adjacent to one another, at least in an unloaded state of the magnet arrangement. As a result, a particularly high load-bearing capacity of the magnet arrangement can be achieved, since the different poles attract each other and the poles of the same type repel each other. This will center the two magnets and position themselves at one height (along the stroke direction) like a magnetic bearing.

In a further advantageous embodiment of a magnet arrangement according to the present invention, the magnet arrangement preferably also has at least one spacer device, with which at least two permanent magnets are kept at a defined distance from one another, the at least two permanent magnets kept at a distance being preferably attached to the spacer device for this purpose.

In a further advantageous embodiment of a magnet arrangement according to the present invention, in particular in a development of a magnet arrangement according to the invention, the spacer device preferably has at least one rod extending parallel to the lifting axis and at least two spacer discs extending perpendicularly to this rod as spacers. Particularly preferably, the spacer device has three rods with spacer elements in the form of spacer disks preferably fastened to the rods, the at least three rods being distributed particularly uniformly in the circumferential direction.

The spacer device is preferably non-magnetic and electrically non-conductive.

A permanent magnet that is to be kept at a distance preferably rests on each spacer disk or is attached to it, for example screwed.

The magnet arrangement particularly preferably has a first spacer device, with which at least two first, outer permanent magnets are kept at a defined distance from one another, with the at least two outer permanent magnets preferably being attached to the first spacer device for this purpose. Particularly preferably, the first spacer device has or is a non-magnetic and an electrically non-conductive linkage with at least three rods and several spacer discs.

The magnet device is particularly preferably designed in such a way that the first permanent magnets can each be fastened to the vehicle body via the first spacer device, so that the first, outer magnets are coupled to the vehicle body.

The magnet arrangement particularly preferably has a second spacer device, with which at least two second, inner permanent magnets are held at a defined distance from one another, with the at least two inner permanent magnets preferably being attached to the second spacer device for this purpose. For this purpose, the first spacer device particularly preferably has or is a non-magnetic and electrically non-conductive threaded rod.

In order to reduce the risk of demagnetization due to mechanical effects, in particular impacts or the like, one or more permanent magnets can each be mounted via a damper, for example a rubber element, and/or connected to the associated spacer device via such a device. For example, one or more of the inner permanent magnets can have a rubber sleeve, via which they are attached to the spacer device, in particular a rubber sleeve, by means of which they are screwed onto a threaded rod of the spacer device.

The magnet arrangement is preferably also designed in such a way that a distance between the individual permanent magnets in the stroke direction can be at least partially adjusted, in particular defined and as required. As a result, a pretension of the magnet arrangement can be adjusted and, as a result, the spring or damping properties of the magnet arrangement. In other words, that in an unloaded state the magnets of a magnet pair do not necessarily have to be at the same height, but that it can sometimes be advantageous if they are offset in a defined manner in the lifting direction when the magnet device is in an unloaded state.

In a further advantageous embodiment of a magnet arrangement according to the present invention, the adjusting device has an electrically non-conductive tube or a support rod with an electrically non-conductive tube section, the tube or the support rod also being non-magnetic and being mounted so that it can be displaced along the lifting axis, and wherein at least one of the coils that can be adjusted in their position along the lifting axis is fastened to the pipe or the pipe section in such a way that a position of at least one coil can be adjusted along the lifting axis by moving the pipe or the support rod along the lifting axis. This makes it possible to achieve a particularly simple adjustment of the position of a coil along the lifting axis.

If a magnet arrangement according to the invention has a plurality of coils, all of the coils are preferably attached to the same tube or the same support rod. This makes it possible to easily adjust the position of all the coils of a magnet arrangement according to the invention.

The tube or the support rod can also be a telescopic tube or a telescopic rod with a first section and a second section that can be displaced along the lifting axis relative to the first section, with at least one of the coils whose position can be adjusted along the lifting axis being attached to one of the sections of the telescopic tube or the Telescopic rod is attached in such a way that the position of the coil can be adjusted along the lifting axis by retracting and/or extending the telescopic tube or the telescopic rod.

In a further advantageous embodiment of a magnet arrangement according to the present invention, the adjustment device has in particular an actuator device for adjusting the position of at least one coil along the stroke axis, in particular an actuator device for displacing the tube or the support rod along the stroke axis. Such an actuator device can in particular include a linear drive, a spindle drive, a hydraulic drive and/or a pneumatic drive.

In a further, particularly advantageous embodiment of a magnet arrangement according to the present invention, in particular in a further development, the adjusting device is set up to adjust the position of at least one coil depending on the position of at least one of the permanent magnets of at least one associated pair of permanent magnets, preferably set, especially dependent from the position of the magnetically stronger permanent magnet of both.

In some cases it has proven to be advantageous if the coil follows the stronger of the two permanent magnets or is adjusted as a function of its position.

A particularly high level of efficiency can be achieved if the coil can be adjusted, in particular adjusted, depending on the position of the two permanent magnets, with the magnet arrangement being particularly preferably set up in such a way that the coil is positioned relative to the two permanent magnets of the associated pair of permanent magnets that as much electrical energy as possible can be generated in order to achieve the highest possible efficiency.

For this purpose, in a particularly advantageous embodiment of a magnet arrangement according to the present invention, the coil can be adjusted in such a way that when the wheel is lifted, the associated inner permanent magnet "dips" through the coil, in particular completely, i.e. is guided through the coil.

For this purpose, the coil can be positioned at half the height of the outer permanent magnet, for example with its lower end, its middle or its upper end (relative to the lifting axis or an installation position of the magnet arrangement in a motor vehicle). Which position of the coil leads to a particularly high amount of electrical energy that can be generated or is optimal depends on the dimensions of the permanent magnets of the associated permanent magnet pair and the wheel lift that occurs in reality or is expected or on the average expected wheel lift.

Adjusting the coil can include adjusting or adjusting the position of the coil and/or moving the coil during the wheel stroke in a direction opposite to the associated inner permanent magnet in order to increase the relative movement between the coil and the associated inner permanent magnet and thus Immersion path” and thus to increase the amount of electrical energy that can be generated.

A movement as described above during the wheel lift can take place by means of the adjustment device and/or by means of a corresponding mechanical device, which mechanically generates a movement depending on the wheel lift and, for example, is kinematically coupled to the vehicle body (the chassis) and/or the wheel, with the mechanical device can in particular have a transmission device, for example a deflection such as a cable, pulley or the like, in order to increase the relative movement between the coil and permanent magnet in such a way that in particular the inner permanent magnet can be completely immersed through the coil.

In a further advantageous embodiment of a magnet arrangement according to the present invention, the adjusting device preferably has at least one sensor device for detecting the position of at least one permanent magnet of a permanent magnet pair and for generating a corresponding sensor signal.

In a further advantageous embodiment of a magnet arrangement according to the present invention, the magnet arrangement also has, in particular, an adaptation device for adapting the magnetization of at least one permanent magnet. Such an adaptation device can be, for example, an electric coil or the like, which is glued to the outside of one of the inner or outer permanent magnets and can be subjected to a defined voltage or current can flow through it in a defined manner, whereby the magnetization of the permanent magnet can be influenced. The magnet arrangement is preferably designed in such a way that the magnetization of at least one permanent magnet of at least one pair of permanent magnets, in particular the inner permanent magnet, can be adjusted in such a way that the permanent magnets of at least one pair of permanent magnets are defined in an unloaded state and align with one another as desired. This enables chassis adjustment.

An adaptation coil is particularly preferably assigned to at least each pole of a magnet. This allows the magnetization/polarity of the individual poles to be "reset" or initialized in a simple manner. Particularly good results can be achieved with an additional locking device, by means of which the magnets can be locked and held at least temporarily in their target position (for an unloaded state) until magnetization/polarity occurs by means of the coils, which can be specifically energized for this purpose of the individual magnets, which is such that the magnets are held in the respective position by the magnetic force (ie remain in the desired position even without the locking device or even if the locking device, wel che is only an aid, is removed again). This makes it possible to “initialize” and/or restore the magnetization after at least partial demagnetization, as a result of which the service life of the magnet arrangement can be increased. All magnets can preferably be magnetized in a defined manner at the same time.

In a further advantageous embodiment of a magnet arrangement according to the present invention, the magnet arrangement also has in particular at least one protective device. The protective device can be designed to protect the magnet arrangement, in particular at least one permanent magnet, preferably all permanent magnets, from external damage, in particular from mechanical damage, such as stone chipping or the like. This can reduce the risk of demagnetization due to mechanical (force) effects. Alternatively or additionally, however, the protective device can also be designed to shield the magnet arrangement. As a result, on the one hand, the magnet arrangement can be protected from the influence of external magnetic fields. In particular, however, surrounding components can be protected from the influence of the strong magnetic field of the magnet arrangement.

A wheel suspension according to the invention for a vehicle is characterized in that the wheel suspension has a magnet arrangement according to the invention, in particular as part of a spring-damper arrangement. A magnet arrangement according to the invention can be a spring of the wheel suspension, in particular a suspension spring, or a damper or a spring strut or damper strut, which combines both functions (suspension and damping). However, a magnet arrangement according to the invention can also be provided only as an additional spring and can be provided in addition to a suspension spring.

A motor vehicle according to the invention has a wheel suspension and is in particular a two-track motor vehicle, a motor vehicle according to the invention being characterized in that the vehicle has a magnetic suspension according to the invention and/or a wheel suspension according to the invention.

In order to be able to generate as much electrical energy as possible by means of the magnet arrangement according to the invention, it is advantageous if, even while the vehicle is parked, from the smallest movements of the vehicle body, which lead to deflection and/or rebound of the wheel and thus to the induction of a voltage in the / the coils of the magnet assembly, electrical energy can be generated.

To increase energy generation when parking, a vehicle according to the invention can in particular have a sailing device, which can preferably be attached to the vehicle body, for example to an existing trailer hitch. This enables the vehicle to be excited using wind energy. In particular, the vehicle movements, in particular the compression and/or rebound and, as a result, the induced voltage can be amplified by means of wind energy through the sail device. As a result, more electrical energy can be generated and the range of an electrically powered vehicle can be extended even further (provided there is a corresponding energy storage device in the vehicle).

Accordingly, a vehicle according to the invention therefore preferably has an electrical energy storage device, in particular at least one chargeable battery, which can be at least partially charged using the electrical energy generated by the magnet arrangement.

The preferred embodiments presented with reference to the magnet arrangement and their advantages also apply correspondingly to the wheel suspension according to the invention and the motor vehicle according to the invention and vice versa, even if the individual advantages and embodiments—to avoid repetition—are each only described once.

Further features of the invention result from the claims, the figure and the description of the figures. All features and feature combinations mentioned above in the description and the features and feature combinations mentioned below in the description of the figures and/or shown alone in the figures can be used not only in the combination specified, but also in other combinations or alone.

The invention will now be explained in more detail using a preferred exemplary embodiment and with reference to the attached drawing.

• 1 eine Prinzipdarstellung eines ersten Ausführungsbeispiels einer erfindungsgemäßen Magnetanordnung.
• 2 das erste Permanentmagneten-Paar aus 1 in Einzelteildarstellung in einem perspektivischen Schnitt.

It shows:

• 1 a schematic representation of a first embodiment of a magnet arrangement according to the invention.
• 2 the first pair of permanent magnets 1 in detail view in a perspective section.

1 shows an embodiment of an inductive magnet arrangement 100 according to the invention for a wheel suspension of a motor vehicle in the form of a passenger car for generating electrical energy when compressing and/or rebounding a wheel, this exemplary embodiment of a magnet arrangement 100 according to the invention having a total of three pairs of permanent magnets P1, P2 and P3, each of which has a first outer permanent magnet M1, M3 or M5 and a second, inner permanent magnets M2, M4 and M6. Each pair of permanent magnets P1, P2 and P3 is assigned a coil S1 or S2 or S3 with a large number of windings.

The outer permanent magnets M1, M3 and M5 are each designed as annular disk magnets and each have a recess, not designated here in more detail, in their center.

The inner permanent magnets M2, M4 and M6 are also disc-shaped and are each arranged concentrically to the associated outer permanent magnet M1, M3 or M5, and are each dimensioned in such a way that they have a defined air gap L in the radial direction between themselves and the associated outer permanent magnet Permanent magnets M1, M3 or M5 can be inserted along a lifting axis H into the outer permanent magnet M1, M3 or M5 or its recess in the middle. That is, the outer permanent magnet M1, M3 or M5 and the associated inner permanent magnet M2, M4 or M6 can be pushed into each other along the stroke axis H with a defined air gap between them in the radial direction.

The coils S1, S2 and S3 are each arranged concentrically to the associated pair of permanent magnets P1, P2 and P3 and are each designed in such a way that at least some of their turns, preferably completely, are located in the air gap of the associated pair of permanent magnets P1, P2 or P3 can be arranged.

The outer permanent magnets M1, M3 and M5 and the inner permanent magnets M2, M4 and M6 are each poled in such a way and arranged relative to the associated coil S1, S2 or S3 that when there is a relative movement between the respective outer permanent magnet M1, M3 or M5 and the respective associated inner permanent magnet M2, M4 or M6 along the lifting axis H using the coil S1, S2 or S3, an electrical energy can be generated.

Through the use of three pairs of permanent magnets P1, P2 and P3, which are arranged stacked and spaced one above the other along the stroke axis H, the load capacity of the magnet arrangement 100 can be increased compared to a magnet arrangement with only one pair of permanent magnets P1, P2 or P3.

To increase the magnetic force, in particular to focus the magnetic field, a magnet arrangement 100 according to the invention can alternatively or additionally also have a plate made of magnetically conductive material, not shown here, which can be attached in particular above a magnet pair P1, P2, or P3 above the outer magnetic ring M1, M3 or M5. Such a plate is particularly advantageous if it also has a recess in the center, but a smaller recess than the outer magnet ring M1, M3 or M5. The recess acts as a “needle eye” and concentrates or collects the magnetic field, as a result of which the carrying capacity of the magnet arrangement 100 can also be increased.

With an additional, not shown here, "freely floating" middle permanent magnet ring in the radial direction between the inner and outer magnets M1 and M2 or M3 and M4 or M5 and M6 or thicker magnets in the stroke direction H, a spring deflection of the magnet arrangement 100 be extended.

In order to prevent the magnets M1, M3 and M5 or M2, M4 and M6 of the individual permanent magnet pairs P1, P2 and P3 or the pairs P1, P2 and P3 from moving relative to one another, the magnet arrangement 100 also has an outer spacer device 10 and an inner spacer device 15, with which the individual permanent magnet pairs P1, P2 and P3 can be kept at a defined distance from one another, with the outer spacer device 10 in particular being able to keep the respective outer permanent magnets M1, M3 and M5 at a distance, which in this exemplary embodiment of a magnet arrangement 100 according to the invention are each firmly attached to the spacer device 10 .

A particularly simple design of an outer spacer device 10 can be implemented using a linkage with rods 11 arranged parallel to the lifting axis H and corresponding spacer discs 12 extending perpendicularly to the lifting axis H, it being advantageous if the rods 11 are arranged evenly distributed in the circumferential direction . For an even distribution of forces, it is particularly advantageous if the outer spacer device 10 has at least three such rods 11. For stabilization or even force distribution and introduction or transmission and guidance, it is advantageous if the rods 11 are are each connected to one another via an upper connecting disk 13 or an upper connecting disk 13 and a lower connecting disk 14 or a lower connecting disk 14 . Such an outer spacer device 10 can be used in a simple manner to connect or couple the outer permanent magnets M1, M3 and M5 to the vehicle body. For this purpose, only a corresponding connecting element 17 is to be provided on the outer spacer device 10, as in the exemplary embodiment in 1 shown as an example in a schematic diagram.

In order to also keep the inner permanent magnets M2, M4 and M6 at a defined distance from one another, in particular at the same defined distance from one another as the outer magnets M1, M3 and M5, in 1 The embodiment shown of a magnet arrangement 100 according to the invention is also provided with a lifting rod 15 as an inner spacer device 15, which can be designed in particular as a threaded rod for easy attachment of the inner magnets M2, M4 and M6. The lifting rod 15 or the threaded rod 15 is in particular likewise designed to be electrically non-conductive and non-magnetic.

The lifting rod 15 can be coupled to a wheel via a corresponding connecting element 18, so that the inner magnets M2, M4 and M6 are moved relative to the outer magnets M1, M3 and M5 during compression and rebound.

According to the invention, the coils S1, S2 and S3 are each mounted so that they can move along the lifting axis H. Furthermore, the magnet arrangement 100 has an adjusting device 19 for adjusting a position of the coils S1, S2 and S3 along the stroke axis H, wherein the coils S1, S2 and S3 can be adjusted by means of the adjusting device 19 along the stroke axis H, such as 1 shows clearly.

As a result, the position of the coils S1 to S3 can be adapted to the position of the magnets M1 to M6 in each case. The coils S1 to S3 can preferably track the outer magnets M1, M3 and M5, which are preferably magnetically stronger than the inner magnets M2, M4 and M6.

In this exemplary embodiment, the adjusting device 19 has an electrically non-conductive coil support tube 16, which is also non-magnetic and is mounted so that it can be displaced along the stroke axis H, with the coils S1, S2 and S3 each being attached to the coil support tube and thus also being movable and along the Lifting axis H are slidably mounted. The coils S1, S2 and S3 are each attached to the coil carrier tube 16, so that a position of the coils S1, S2 and S3 along the stroke axis H can be adjusted by moving the coil carrier tube 16 along the stroke axis H. This allows the coils S1, S2 and S3 to be positioned in a simple manner such that as much electrical energy as possible can be generated when the inner magnets M2, M4 and M6 move relative to the respective outer magnets M1, M3 and M5.

The adjustment device 19 is set up in particular to adjust the position of the coils S1, S2 and S3 depending on the position of the permanent magnets of the individual permanent magnet pairs P1, P2 and P3.

For this purpose, the adjustment device 19 also has at least one sensor device (not shown here) for detecting the position of at least one permanent magnet M1 to M6 of a permanent magnet pair P1, P2 or P3 and for generating a corresponding sensor signal.

To adjust the position of the coils S1, S2 and S3 along the stroke axis H or to adjust or move the coil support tube 16 along the stroke axis H, the adjustment device 19 has in particular an actuator device, which in this exemplary embodiment is formed by a plurality of linear drives. which each have a pinion 20 and a toothed rack 21, the individual linear drives being distributed around the tube 16 in the circumferential direction. A precise and simple displacement of the coil support tube 16 and thus of the coils S1 to S3 along the stroke axis H can be achieved by means of the linear drives. The toothed racks 21 are attached to the coil carrier tube 16 and the pinions to the spacer device 10, in particular to the lower connecting plate 14.

The magnet arrangement 100 is preferably designed in such a way and the coils S1, S2 and S3 can be adjusted in such a way that the inner permanent magnets M2, M4 and M6 completely penetrate through the associated coil S1, S2 and S3 with as many wheel strokes as possible.

In an embodiment that is not shown here but is possible, the adjusting device can also be designed in such a way that during a wheel lift, the coils S1, S2 and S3 are caused to move relative to the associated pairs of permanent magnets, in particular to the inner magnets M2, M4 and M6 , so that a complete immersion is achieved in each case. The Spu can do this lenträgerrohr 16 be connected, for example by means of a translation device on the vehicle body (chassis).

For an optimal chassis setting or an optimal setting of the magnet arrangement 100, 1 Magnet arrangement 100 shown also has an adaptation device 30, which includes a plurality of electrical coils 30, which are each glued to an outer lateral surface of the inner permanent magnets M2, M4 and M6 and to which an electrical voltage can be applied or through which electrical current can be guided in a targeted manner . This allows the magnetization of the inner permanent magnets M2, M4 and M6 to be influenced or adapted in a defined manner in such a way that the inner permanent magnets M2, M4 and M6 are defined and aligned in a targeted manner relative to the outer permanent magnets M1, M3 and M5 and the desired setting is achieved .

To protect against mechanical influences and thus to protect against demagnetization due to mechanical influences, e.g. due to stone chipping, as well as for magnetic shielding, the magnet arrangement 100 in this exemplary embodiment also has a protective device 40 in the form of a correspondingly designed metal housing 40, which encloses the magnet arrangement 100 at least partially surrounds, in particular encloses.

A particularly advantageous magnet arrangement 100, in particular a magnet arrangement 100 with a high load-carrying capacity with as few or as small magnets as possible M1 to M6 can be achieved if the permanent magnets of a permanent magnet pair, as exemplified in 2 shown for the first pair of permanent magnets P1, each having a magnetic north pole N and at least one magnetic south pole S and the outer permanent magnet M1 and the inner permanent magnet M2 are arranged relative to one another in such a way that the different poles N and S are arranged adjacent to one another.

In addition to the variants described in this application, a large number of modifications are possible, in particular of a constructive nature, without departing from the scope of protection of the patent claims.

Reference List

100

magnet arrangement according to the invention

10

outer spacer device

11

Rod of the spacer device

12

Spacer washer of the spacer device

13

upper connecting disc

14

lower connecting disc

15

internal spacer/lift rod

16

coil carrier tube

17

Connection element for connection to the vehicle body

18

Connection element for connection to a wheel

19

adjusting device

20

pinion

21

rack

30

adaptation device

40

protective device

H

lifting axis

L

air gap

M1, M3, M5

outer permanent magnet

M2, M4, M6

inner permanent magnet

N

magnetic north pole

P1, P2, P3

pair of permanent magnets

S

magnetic south pole

S1, S2, S3

Kitchen sink

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102011010165 B4 [0003]
• CN201065906Y[0003]
• CN201344225Y[0003]

Claims (13)

Inductive magnet arrangement (100) for a wheel suspension of a motor vehicle for generating electrical energy when compressing and/or rebounding a wheel, the magnet arrangement (100) having at least a first pair of permanent magnets (P1, P2, P3) with a first permanent magnet (M1, M3 , M5) and a second permanent magnet (M2, M4, M6) and at least one first coil (S1, S2, S3) with a plurality of turns, the first permanent magnet (M1, M3, M5) having a recess in its center and an outer permanent magnet (M1, M3, M5), the second permanent magnet (M2, M4, M6) forming an inner permanent magnet (M2, M4, M6), one of the permanent magnets (M1, M3, M5) being mechanically connected to the vehicle body can be coupled and the other permanent magnet (M2, M4, M6) with an associated wheel, the second, inner permanent magnet (M2, M4, M6) being arranged concentrically to the first, outer permanent magnet (M1, M3, M5) and the first Permanent magnet (M1, M3, M5) and the second permanent magnet (M2, M4, M6) with a defined air gap (L) between them can be pushed into one another in the radial direction along a stroke axis (H), the coil (S1, S2, S3 ) is arranged concentrically to the first pair of permanent magnets (P1, P2, P3) and is designed in such a way that at least some of its turns can be arranged in the air gap (L) of the first pair of permanent magnets (P1, P2, P3). , and wherein the outer permanent magnet (M1, M3, M5) and the inner permanent magnet (M2, M4, M6) are polarized in such a way and can be or are arranged relative to the coil (S1, S2, S3) in such a way that when there is a relative movement between the outer permanent magnets (M1, M3, M5) and the inner permanent magnets (M2, M4, M6) along the lifting axis (H) using the coil (S1, S2, S3) electrical energy can be generated, characterized in that the coil (S1, S2, S3) is movably mounted along the lifting axis (H) and the magnet arrangement (100) also has an adjusting device (10) for adjusting a position of the coil (S1, S2, S3) along the lifting axis (H) and the first coil ( S1, S2, S3) can be adjusted along the lifting axis (H) by means of the adjusting device (19). Magnet arrangement (100) after claim 1 , characterized in that the magnet arrangement has at least one further permanent magnet pair (P2, P3) designed analogously to the first permanent magnet pair (P1) and at least one further coil, the permanent magnets (M3, M4; M5, M6) of the further permanent magnet - pair (P2, P3) are arranged concentrically and spaced along the stroke axis (H) to the first pair of permanent magnets (P1) and the further coil (S2, S3) is arranged concentrically to the further pair of permanent magnets (P1) and is designed in this way that they can be arranged at least in sections with at least some of their turns in the air gap (L) and thus in the radial direction between the inner permanent magnet (M4, M6) and the outer permanent magnet (M3, M5) of the further permanent magnet pair (P2, P3). and wherein the outer permanent magnet (M3, M5) and the inner permanent magnet (M4, M6) are poled in such a way and can be or are arranged relative to the further coil (S2, S3) in such a way that when there is a relative movement between the outer permanent magnet (M3 , M5) and the inner permanent magnet (M4, M6) of the further pair of permanent magnets (P2, P3) along the lifting axis (H) using the further coil (S2, S3) electrical energy can be generated, wherein the further coil (S2, S3 ) is also mounted movably along the lifting axis (H) and can be adjusted in its position along the lifting axis (H) by means of the adjusting device (19). Magnet arrangement (100) after claim 1 or 2 , characterized in that the outer permanent magnet (M1, M3, M5) and the inner permanent magnet (M2, M4, M6) of at least one permanent magnet pair (P1, P2, P3) each have a magnetic north pole (N) and at least one magnetic south pole (S) and the outer permanent magnet (M1, M3, M5) and the inner permanent magnet (M2, M4, M6) are arranged to each other such that different poles (N, S) are arranged adjacent to each other. Magnet arrangement (100) after claim 2 or 3 , characterized in that the magnet arrangement (100) also has at least one spacer device (10) with which at least two permanent magnets (M1, M3, M5; M2, M4, M6) are held at a defined distance from one another. Magnet arrangement (100) after claim 4 , characterized in that the spacer device (10) has at least one parallel to the lifting axis (H) extending rod (11) and at least two perpendicular to this extending spacers (12) as spacers. Magnet arrangement (100) according to any one of the preceding claims, characterized in that the adjusting device (10) is not an electrically conductive tube (16) or a support rod with an electrically non-conductive tube section, wherein the tube (16) or the support rod is also non-magnetic and is mounted to be displaceable along the stroke axis (H), and wherein at least one of the positionally adjustable along the stroke axis Coils (S1, S2, S3) are attached to the tube (16) or the tube section in such a way that by moving the tube (16) or the carrier rod along the lifting axis (H), at least one coil (S1, S2, S3) can be positioned the lifting axis (H) is adjustable. Magnet arrangement (100) according to one of the preceding claims, characterized in that the adjustment device (19) has an actuator device for adjusting the position of at least one coil (S1, S2, S3) along the stroke axis (H). Magnet arrangement (100) according to one of the preceding claims, characterized in that the adjusting device (19) is set up to adjust the position of at least one coil (19) depending on the position of at least one of the permanent magnets (M1, .., M6) of the to adjust the associated pair of permanent magnets (P1, P2, P3). Magnet arrangement (100) according to one of the preceding claims, characterized in that the adjusting device (10) has at least one sensor device for detecting the position of at least one permanent magnet (M1, .., M6) of a permanent magnet pair (P1, P2, P3) and Generation of a corresponding sensor signal. Magnet arrangement (100) according to one of the preceding claims, characterized in that the magnet arrangement (100) has an adaptation device (30) for adapting the magnetization of at least one permanent magnet (M1, ..., M6). Magnet arrangement (100) according to one of the preceding claims, characterized in that the magnet arrangement (100) has at least one protective device (40). Wheel suspension for a vehicle, characterized in that the wheel suspension has a magnet arrangement (100) according to one of Claims 1 until 11 has, in particular as part of a spring-damper assembly. Motor vehicle, in particular two-track motor vehicle, with a wheel suspension, characterized in that the vehicle has a magnet arrangement (100) according to one of Claims 1 until 11 has and / or a wheel suspension claim 12 .

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