DE102022005068A1 - Device and method for driving a vehicle on a vehicle test bench - Google Patents

Abstract

The present invention relates to a device and a method for selectively driving a vehicle F for a vehicle test bench, in particular a test bench for advanced driver assistance systems (“Advanced Driver Assistant System” - ADAS), in which by means of a device to be attached directly to the wheel hub of the vehicle F and with a wheel drive device 1 provided with its own wheel 2 and drive section 4, a compact, mobile drive mechanism suitable for stationary testing operation is provided. In addition, the present invention relates to a test stand system P, in which, by integrating the aforementioned edge drive device 1 into a vehicle F to be checked, vehicle functions can be checked, particularly when the vehicle shaft is driven.

Description

The present invention relates to a device and a method for selectively driving a vehicle for a vehicle test bench, in particular a test bench for advanced driver assistance systems (“Advanced Driver Assistant System” - ADAS), in which by means of a device to be attached directly to the wheel hub of the vehicle and with its own Wheel drive device provided with wheel and drive section, a compact, mobile drive mechanism suitable for stationary testing operation is provided. In addition, the present invention relates to a test stand system in which, by integrating the aforementioned edge drive device into a vehicle to be tested, vehicle functions can be checked, particularly when the vehicle shaft is driven.

Background of the invention

Due to increasingly complex capabilities and the resulting requirement of today's driver assistance systems integrated in vehicles (“Advanced Driver Assistant System” - ADAS), the most precise evaluation and control of vehicle-specific processes (e.g. distance dimensions, brake assistants, automatic light control, adaptive speed adjustment, etc.) To realize this, vehicle test benches suitable for ADAS testing in particular have become an important part of the vehicle industry.

In GB2557252A For this purpose, for example, a vehicle test stand is shown, in which a vehicle to be tested is positioned on driven rollers and the wheels of the vehicle are driven by the latter rollers to simulate a route. In addition, the vehicle test bench described provides for the addition of a plurality of movable land vehicles, which various obstacles, such as traffic signs or pedestrian dummies, around the positioned vehicle method and thus, by measuring the ADAS functions in relation to the introduced obstacles, enables any inaccuracies to be detected.

Despite constant further development of such test benches, however, the problem continues to arise in most such systems that, due to the external drive trains integrated into the test bench to drive the vehicle in a fixed position, such as drive belts or rollers, there has always been a dangerous retraction point on the contact surface between the test bench moving wheel and the latter drive devices arise, which prohibits the presence or integration of further elements in the vicinity of the test bench and thus significantly impairs the compactness and efficiency of the system. In addition, it is known that in order to test various ADAS systems on such roller or belt test benches, especially for the analysis of assisted steering mechanisms such as parking aids or lane departure warning systems, extensive modifications (e.g. decoupling the steering linkage from the steering wheel) are carried out on the vehicle to be tested must be carried out, which prevents an accurate simulation of existing force reactions during cornering and thus reduces the accuracy of the testing process.

In this respect, it is an object of the present invention to provide, in particular, a wheel drive device and a method for selectively driving a vehicle positioned on a test bench, which can overcome the previously described shortcomings of the prior art and, in particular, a more compact, safer and thus suitable for the use of additional Enable suitable testing mechanics for test elements. In addition, it is an object of the present invention to carry out the simulation and testing of steering methods on a test bench even under real force effects, so that the precision of the testing method can be further improved.

Detailed description of the invention

To solve the above-mentioned problem, the features of the independent claims are suggested. The dependent claims relate to preferred embodiments of the present invention.

The claimed wheel drive device for driving a vehicle in a vehicle test bench, in particular in an ADAS test bench, can preferably include a wheel section equipped with at least one receiving wheel for supporting the vehicle by the wheel drive device and a drive section connected to the wheel section, which preferably for direct rotary drive of a wheel hub (and thus a corresponding drive shaft) of the vehicle, preferably around a predefined drive axle, can be designed to be attachable to the aforementioned wheel hub. The present wheel drive device thus preferably forms an at least two-part device system, which enables both secure positioning of the drive required for the vehicle test using the first device (the wheel section) and, by means of the receiving wheel provided on the drive device and to be attached to the vehicle, an original one faithful imitation of the vehicle wheel equipment, whereas the second device (the drive section) ensures direct operation of the drive shaft via the connected vehicle hub and thus a drive mechanism that is easy to integrate into the vehicle. Consequently, with the present invention it is possible, contrary to the prior art, to ensure in particular a wheel drive device which not only, due to the drive section to be attached directly to the wheel hub of the vehicle, the above-mentioned external roller or belt drives (and thus the resulting ones dangerous feed points), but also allows a true-to-original simulation of any shear or carrier forces that occur during a real vehicle journey by means of the wheel section that acts as a receiving wheel.

For this purpose, the receiving wheel of the wheel section can initially comprise at least one special vehicle rim and a tire clamped on this vehicle rim, such as a solid rubber or a pneumatic tire, which, as mentioned above, when the present wheel drive device is connected to the vehicle to be tested, as an imitation of the the actual vehicle wheel used by the vehicle. The pick-up wheel or the wheel section itself can preferably be releasably fixed (e.g. by screw, rivet, press or feather key connections) with the drive section of the wheel drive device, which generates the advantage that the pick-up wheel described above can also, depending on the Testing vehicle type, can be exchanged and / or adapted and thus an extremely versatile, modularly configurable and correspondingly cost-effective design of the wheel drive device is realized.

In a further exemplary embodiment, the wheel section of the present invention can also provide, in particular for connecting the wheel section to the drive section, at least one connecting element attached to the receiving wheel, which, preferably to reduce any internal pivoting forces, is centered in the receiving wheel, for example the vehicle rim can be and thus enables an equally centered positioning of the drive section on the aforementioned wheel section. In a particularly preferred embodiment, the connecting element of the wheel section can also be designed for this purpose, in particular by way of example, as an annular bearing device, which, by means of at least one or a plurality of implemented mechanical bearings, preferably radial bearings, the drive section (or at least a part of the drive section) of the wheel drive device can be detachably and movably integrated into the wheel section and thus ensure efficient mounting of the drive section in the wheel section.

In this respect, the above-mentioned construction of the present wheel drive device can in particular generate the advantage that, through the secure mounting of the drive section used to drive the wheel hub of the vehicle to be tested by the connecting element, a precise and at the same time at least partially movement-free positioning of the drive section on the wheel section and can therefore be implemented on the vehicle connected to it. In addition, it is preferably also possible, due to the explicitly movable mounting of the drive section in the wheel section, to completely separate the drive movements to be generated by the drive section, such as those that are to be used to drive the connected wheel hub, from any movements of the wheel section or the wheel section used To decouple the receiving wheel, so that the drive section of the present invention can be designed to be movable, in particular relative to a movement of the wheel section. In other words, the wheel section can preferably be mounted or designed independently of the movement of the drive section and thus of the vehicle hub connected to it.

Thus, based on the above-mentioned principles, the present wheel drive device can, for example, preferably be set up in such a way that while the wheel hub is being driven by the drive section and based on the previously described mounting of the drive section in the connecting element, the wheel hub rotates around the drive axle, in particular when it is stationary Wheel section and thus can be carried out with the receiving wheel immobile, whereby the test process generated using the wheel drive device can preferably be carried out with the vehicle wheels completely stopped. In this respect, integrating the described wheel drive device into a vehicle to be tested makes it possible, in particular, to carry out an analysis of various vehicle functions based on the drive of a vehicle without previously positioning it to fix it on the required roller or belt drives, so that by eliminating the latter dangerous rotating elements, Not only does safety further improve during the testing process, but the space thus freed up can also be used efficiently for additional testing elements (e.g. attaching obstacles to measure distance).

The one generated by the drive section of the present wheel drive device and used for The drive mechanism used to rotate the vehicle hub can also preferably be generated by transmitting a rotary movement already generated in the drive section. For this purpose, the drive section can, in a particularly preferred exemplary embodiment, in particular comprise a rotor element designed at least with a rotor and a stator element designed with a stator, so that by moving the rotor of the rotor element around or within the stator of the stator element, a for the movement of the Wheel hub can generate torque to be used around the aforementioned drive axle. However, the general type of drive of the above-mentioned drive section is in no way limited by the previously described construction. In this respect, the control and propulsion of the at least one rotor of the rotor section or the drive section can be carried out, for example, on the basis of electrical, for example through windings attached to the stator and the rotor section, pneumatic and / or hydraulic interactions, so that, depending on the to be used Testing system, an efficiently adapted drive mechanism can be provided.

In order to be able to ensure increased safety during the testing process, the stator and rotor elements of the drive section described above can, in a particularly preferred example, be designed primarily as an internal rotor motor. This has the particular advantage that by enclosing the rotating rotor of the rotor element in the stator element, exposing potentially dangerous rotating mechanical parts can be avoided and the test space can therefore be maximally secured for any test processes and the elements and processors required for this.

In order to generate a particularly efficient and stable protective mechanism, the stator element can also be designed to be firmly connected for this purpose, in particular to the wheel section of the wheel drive device, for example to the rim of the receiving wheel to be used or the aforementioned connecting element, so that the lowest possible im In the preferred case, the free space between the drive section and the wheel section can only be created within the wheel section. This also creates the additional benefit that, in addition to the already described introduction of the drive section into the connecting element of the wheel section, a further fixation of the drive section to the wheel section is made possible, whereby the storage of the former within the present invention is even further stabilized and the shape of the stressed wheel drive device can be kept extremely compact.

An even further improved compactness and safety can also be achieved in particular in that the drive section can preferably also be aligned plane-parallel to the longitudinal axis of the receiving wheel used. Particularly preferably, the stator element, as an external element that can be connected to the wheel section, can be provided or designed with a rigid, annular or hole-cylindrical housing, which, when connected to the wheel section, is preferably oriented along its longitudinal axes parallel to the longitudinal axes of the receiving wheel of the wheel section can be and thus enables the densest possible construction of the present wheel drive device. In a particularly preferred exemplary embodiment, the housing of the stator element can also span at least the entire surface of the drive section that is oriented towards the outside, i.e. not towards the respective vehicle, whereby the disclosure of any moving parts (and thus potential danger points) within the present invention can be effectively prevented .

The rotor element to be used to move the respective wheel hub of the vehicle or the rotor installed in it can also be designed to be movable, preferably rotatable, for the targeted drive of the wheel hub and thus the drive shaft assigned to it, preferably within the stator element or the aforementioned housing , so that by moving the internal rotor motor created in this way, a direct angular momentum or torque can be passed on to the vehicle hub.

In order to enable a drive mechanism that is as loss-free as possible, the rotor element can in particular preferably be designed to be fixable directly to the respective wheel hub of the vehicle, so that the latter wheel hub is moved directly by moving the rotor and therefore no further drive or deflection mechanisms are required to drive the vehicle. In order to maintain the compactness of the present invention for this purpose, the rotor element or the rotor to be found in it can also preferably be rotatably aligned within the stator element, also parallel to the drive axle of the wheel hub described above, whereby a direct and primarily one-dimensional Rotational connection between the wheel hub to be driven and the rotor of the rotor element can be made possible.

Accordingly, it is preferably possible in the present invention that by moving the rotor within the rotor element, a targeted angular momentum aligned along the drive axis of the wheel hub can be generated, which Due to the direct contact of the rotor element with the wheel hub, it can be transmitted directly to the wheel hub and can therefore be used to drive a respective vehicle drive shaft with almost no loss.

For precise connection and force transmission of the rotor element with and to the wheel hub, the present invention can in particular be set up in such a way that when integrating the drive section into the wheel section of the wheel drive device, the rotor element is preferably inserted into the previously described connecting element of the wheel section, preferably with a precise fit, and thus the rotor element can equally be rotatably mounted in the connecting element or in the at least one radial bearing implemented in it. In this respect, the above-mentioned construction can create the advantage that any degrees of freedom during the power transmission from the drive section to the wheel hub can be reduced by the additional storage by means of the connecting element and thus the stability of the present invention can be further increased.

For direct connection of the rotor element to the wheel hub, the rotor element can also preferably additionally have at least one extension piece attached to the rotor and equally rotatable, such as a movable plate element or an additional element specially set up for insertion into the connecting element of the wheel section and contacting on the wheel hub. include, which can pass on the previously described forces resulting from driving the rotor directly to the wheel hub by simultaneously fixing it to the rotor of the rotor element and the wheel hub to be driven, thus allowing an individual and once again extremely compact design of the present wheel drive device.

Thus, in a preferred exemplary embodiment, the combination of rotor and stator element of the drive section of the present invention, as already mentioned, can be provided, for example, with a ring-shaped or hole-cylindrical housing structure, which, by orienting the latter housing structure to the alignment of the wheel section, more precisely, preferably parallel to the longitudinal axis of the receiving wheel implemented in the wheel section, a close approach of the drive section to the wheel section of the wheel drive device is permitted. In order to also efficiently contact the drive section with the wheel hub of the vehicle to be checked, at least the rotor of the rotor element of the drive section can preferably additionally be provided or connected to the previously described extension piece, whereby, by driving the rotor and generating the rotor along the drive axis generated torque, the extension piece and thus the wheel hub contacted with it can be rotated.

As already indicated, the extension piece itself can take on a wide variety of shapes, insofar as a direct connection between the rotor and the wheel hub of the vehicle can be ensured. Accordingly, in a first exemplary embodiment, the extension piece can be designed at least as a connecting structure protruding from the stator element or the above-mentioned housing structure of the drive section, so that preferably by inserting the extension piece into the connecting element, preferably into the at least one bearing of the connecting element, and that subsequent fixing of the extension piece on the wheel hub, an efficient alignment of the drive section as well as an effective power transmission aligned with the wheel hub can be generated. In this respect, the body of the connecting structure can therefore preferably also form at least one bearing surface designed to integrate the drive section into the connecting element, which can be contacted, preferably movably, with a contact surface located in the bearing of the connecting element for precise alignment of the drive section in the claimed wheel drive device and so the the above-mentioned direct power transmission enables. Further exemplary embodiments of the extension piece can also include, in particular, a series of shapes that are specifically adapted to the structures of the drive or wheel section.

Thus, in at least one further exemplary embodiment, the extension piece can preferably at the same time be designed to be form-fitting (bearing surface of the extension piece rests on the contact surface of the connecting element) into the connecting element or the at least one (radial) bearing of the connecting element of the wheel section, so that during driving of the rotor and the resulting movement of the extension piece, any disruptive axial forces can be effectively reduced. In addition, at least one end of the extension piece can form a hub contact surface specifically designed for contacting the connecting piece with the wheel hub, which, for example, with mechanical contacting structures, such as threaded bores, toothed couplings or springs, realize a rigid fixation of the extension piece with the wheel hub and thus a fault-free Can ensure transmission of the torque generated by the rotor.

In further exemplary embodiments, the connection structures used between the rotor of the red section and the extension piece can also vary depending on the design of the drive section. In this respect, the extension piece can preferably be designed to be fastened, for example by means of integrated screw or rivet connections, to an inner surface of the movable rotor that is aligned with the wheel hub, ie in the direction of the vehicle to be checked, so that the general length of the extension piece and thus the resulting force arm is kept to a minimum can be reduced. In a further exemplary embodiment, however, it may also be possible for the extension piece to be connected in particular preferably to the outer surface (ie on the side facing away from the vehicle) of the rotor, whereby an additional casing of the rotor is generated by the extension piece and consequently the Stability of the drive section can be further improved during the rotation of the rotor.

Accordingly, it can be understood that due to the extremely compact properties of the present wheel drive device, which simulate natural conditions (e.g. the weight forces absorbed by a vehicle wheel), an equally efficient and precise drive mechanism for driving a vehicle or a vehicle shaft can be provided in a test bench . In addition, the direct contact of the drive device with the respective wheel hub of the vehicle to be tested enables the decisive advantage in particular that the drive elements to be used (in this case the drive section) no longer have to be loaded by the respective vehicle wheels themselves (such as when rolling - or belt test bench), but can be integrated individually into the corresponding vehicle to be tested, so that the present invention can also be used in particular as a mobile, that is freely movable, wheel drive device.

Based on these principles, the energy required to drive the drive section can, for example, only be supplied by a number of lines, whereby the entire drive device can preferably continue to be positioned freely within a test stand to be used. In this respect, in a particularly preferred exemplary embodiment, the drive section, preferably on the stator element, can also include at least one additional line element, which can be provided with one or a plurality of the aforementioned energy lines that can be connected to an associated motor and thus facilitate simple transport of the present wheel drive device ensures. As already described, the form of the energy to be used can vary depending on the type and operation of the test stand to be used, so that the energy to be introduced into the drive device through the line element is, for example, electrical energy (by conducting an electrical current), but also for For example, it can be designed as hydraulic (e.g. in the form of introduced air pressure to move mechanical elements) or pneumatic energy (e.g. through the introduction of fluid flows).

In the present invention, the control of the drive section and thus the adaptation of the driving rotational movement, for example generated by the rotor of the rotor element, can preferably take place via an external control device or one integrated within the wheel drive device. Thus, in order to generate selective rotational movements of the rotor or the wheel hub of the vehicle to be checked connected to it, the control device can, for example, preferably be set up to regulate the energy flowing through the line element into the drive section according to a predefined control protocol, so that the wheel drive device claimed generated drive of the vehicle can preferably be carried out partially, but in a particularly preferred case also fully automatically. In this respect, the present wheel drive device can also particularly preferably be designed as an automatable device.

For improved adaptation and identification of the drive forces to be generated, the present wheel drive device can also include a sensor device integrated into the wheel drive device and preferably connected at least to the control device for signaling purposes, which by means of implemented sensors at least detects the rotational movement of the driven wheel hub or the rotational forces arising on the wheel hub , such as torques, and can therefore provide an effective feedback system for precise control of the drive section. Accordingly, in the present invention it may be at least equally possible for the above-mentioned control device to precisely control the drive section to receive specific information regarding current drive properties (e.g. generated torques, rotational frequencies or existing axial forces) on the drive section or the wheel hub from the sensor device and the Control process (for example by changing the previously described control protocol) at least based on this information received can be adjusted so that a more precise and, in particular, safer drive mechanism is possible.

The measurement of the drive properties described above by means of the last-mentioned sensor device can preferably be based, for example, on mechanical, optical or electrical interaction between the wheel hub to be driven and individual sensor elements of the sensor device. For example, the sensor device can be equipped for this purpose with one or a plurality of optical sensors, such as a light barrier or imaging sensor (e.g. a CCD chip with appropriate optics), which detect the movement of the latter by focusing on the driven wheel hub, preferably in real time can analyze. In a further particularly preferred exemplary embodiment, however, the claimed sensor device can also be designed in particular as a mechanical sensor device, for example as a mechanical rotary encoder, whereby any forces introduced into the wheel hub can be measured primarily directly within the wheel drive device and thus enable an extremely precise analysis.

Thus, in order to realize the aforementioned mechanical detection of respective rotational movements or forces on the wheel hub to be driven, the integrated sensor device can, for example, preferably comprise at least one further, preferably rotatably designed transmission element, which connects the sensor device mechanically to the wheel hub to be driven, but at least to the drive section of the claimed Wheel drive device connects and can therefore forward the described drive properties of the wheel hub directly to the sensor device. Here, the rotatable transmission element can, in a particularly preferred case, be positioned in particular centrally on the wheel hub or at least on a device element connected to the wheel hub and fixed on the drive axle of the wheel hub, so that the transmission element is preferably coaxial (i.e. equally along the at least one drive axle of the wheel hub ) rotate with the driven wheel hub and can transmit any rotational forces and movements to the sensor device primarily without loss.

The sensor direction itself, on the other hand, can preferably be set up, based on the movement of the above-mentioned transmission element, to record the rotation of the transmission element as well as the features associated with this movement (e.g. a generated torque, rotational frequencies, etc.) and, by means of analysis of the latter, equally the rotational movement to detect and evaluate the driven wheel hub. As described, the sensor device can, for example, be designed for this purpose at least as a rotary encoder, so that, for example, by forwarding the rotary movement of the transmission element to a gear integrated in the sensor device and a subsequent analysis of the gear movement by means of a likewise integrated and digitizing readout device (for example any type of usually Incremental or absolute encoders used in rotary encoders) enables precise detection of the forces and movement forcing acting on the wheel hub.

In a further preferred exemplary embodiment, it may also be equally possible for the previously described sensor device, in addition to or instead of the above-mentioned detection method by means of the transmission element, to be connected at least to both the rotor element and/or the wheel hub and the stator element of the claimed drive section can, so that the determined properties of the rotational movement of the wheel hub to be driven can also be detected in particular in relation to the movement of the stator element and / or the wheel section connected to it and can therefore be recorded much more precisely thanks to the additional standardization option generated in this way. In this respect, the present sensor device of the wheel drive device can also be set up in particular to detect the rotational movement of the wheel hub primarily in relation to, i.e. in relation to, the movement of the stator element and/or the wheel section.

It can be seen below that with the help of the above-mentioned and claimed wheel drive device and the device elements integrated therein, a wide range of preferred advantages can be generated compared to conventional vehicle drives used for vehicle testing, which, due to the simultaneously mobile and individually designed drive mechanics, are extremely effective Preferably any type of vehicle test bench (i.e. even existing vehicle test benches) can be integrated.

In the following, a test stand system set up for testing vehicle functions, in particular for testing ADAS functions of a motor vehicle in stationary operation, is also claimed, which, by integrating the previously described wheel drive device, equally has the advantages mentioned above and is therefore different from conventional test stands and test stand systems is different.

The claimed test stand system can initially, in addition to the previously described wheel drive device to be attached to at least one wheel hub of a vehicle to be tested, at least one contact surface for positioning the vehicle to be tested within the test stand system and one for measuring the vehicle functions, in particular ADAS functions, include a measuring system set up.

The contact area itself can initially be viewed as any type of device structure that is at least capable of supporting the vehicle to be tested and, in a preferred case, positioning it for the measurement processes integrated within the test bench system. In this respect, the claimed contact area can, in a first embodiment, for example, be designed as a simple, rigid receiving plate or geometry, but in others also in particular as a receiving device that can be moved in one or more directions, such as a dynamic lifting platform or an aerial work platform, so that the vehicle to be tested can be efficiently aligned for any type of audit process. In order to further improve the mobility of the claimed wheel drive device in particular and to reproduce as precisely as possible any forces required for the precise simulation of vehicle functions (e.g. shearing or centrifugal forces generated during cornering), the present contact surface can also be at least additionally equipped with further locking or drive devices be, whereby the previously described testing process can be adapted as individually as possible to the detection of the vehicle functions to be identified.

Thus, in a first exemplary embodiment, the contact area can at least additionally have one or a plurality of motors integrated into the contact area or at least positioned along it, which have at least one power line with the drive section of the implemented wheel drive device, preferably with the aforementioned line element of the drive section , can be connected and thus, due to the dynamically movable type of connection, ensure both the energy supply and the mobile properties of the wheel drive device. As already described, the energy used to operate the claimed wheel drive device is again not limited to a specific type of energy, but can preferably, depending on the test bench system, be based on electrical, pneumatic and / or hydraulic interactions, so that the previously described energy lines are the same can preferably be present, for example, as electrical cables, hydraulic hoses or pneumatic connecting elements. In this respect, the term “motor” in this context should not be understood as a simple electric motor, but can equally be viewed as any drive machine (e.g. a driven hydraulic or pneumatic pump) that can ensure the above-mentioned energy connection.

In order to be able to enable functional tests for analyzing steering mechanisms (such as automatic parking aids, lane corrections, etc.), the present contact area can also preferably be equipped with at least one or more steering elements designed to move the vehicle wheels/receiving wheels. Correspondingly, in an extremely preferred exemplary embodiment, the present contact surface can, for example, comprise at least one turntable set up for movably receiving a vehicle wheel, in particular the receiving wheel of the wheel drive device implemented in the vehicle to be tested, on which a respective vehicle/receiving wheel is positioned to imitate steering movements and rotates at least along a vertical axis by moving the turntable, but in particularly preferred cases can also be pivoted three-dimensionally. For this purpose, the support surface of the turntable can, for example, preferably be positioned on a controllable pivot base equipped with a plurality of spring and bearing elements, which allows the contact surface between the turntable and the vehicle wheel resting on it to be pivoted three-dimensionally, preferably by a predefined pivot angle (for example by a swivel angle of up to 30°, but in preferred cases also up to 45°) and any unevenness or steering or driving forces that occur and need to be simulated are effectively transmitted to the vehicle wheels (and thus to the respective vehicle shafts or the vehicle per se). In this respect, the at least one turntable of the stressed contact area can thus be designed to be rotatable at least along a vertically oriented axis of rotation to simulate steering forces, but in a particularly preferred exemplary embodiment it can itself be designed to be pivotable in three dimensions.

The wheel drive device to be used to directly drive the wheel hub of the vehicle to be tested can also be attached in the claimed test stand system to at least one wheel hub of the aforementioned vehicle, whereby, by means of the drive mechanism already described, the corresponding wheel hub and thus the vehicle shaft of the vehicle connected to it can be driven directly, each However, the associated vehicle wheel positioned on the contact surface (ie also the receiving wheel of the wheel section) remains motionless on the contact surface at all times. In this respect, it is possible, particularly in the present test stand system, to ensure a drive of the vehicle to be tested with the vehicle weight fully supported on the vehicle wheels or the body connected to them, without having to position external roller or belt drive trains below the vehicle, which means a much more compact , safer and correspondingly more efficient test bench structure can be generated.

Further advantages also arise from the modularity of the at least one wheel drive device to be integrated. For example, it may be possible to drive not just one, but any number of vehicle shafts, preferably separately and selectively, by integrating a plurality of the wheel drive device mentioned on the vehicle to be tested. Accordingly, the present test bench system can, for example, provide for at least two wheel hubs belonging to a drive shaft to be provided with one of the claimed wheel drive devices, so that both sides of the drive shaft can be driven and thus at least one single-axle test bench system can be created. In a further exemplary embodiment, however, it may also be equally possible, for example, to provide each or at least a predefined number of wheel hubs of the vehicle with a wheel drive device, so that the present test bench system can be used as an all-wheel drive or universal axle test bench using simple expansion mechanisms.

In order to ensure extremely simple driving of single-axle driven vehicles, the present test stand system can also be set up in particular to equip only predefined, that is selectively selected, wheel hubs with the claimed wheel drive device. For example, in a particularly preferred exemplary embodiment, the test stand system can be set up to provide and drive only the wheel hubs that cannot be driven by the vehicle, more precisely wheel hubs that are not actively driven by the internal motor of the vehicle, with the claimed wheel drive device, so that Said engine is efficiently protected and driving the vehicle or simulating existing vehicle functions can be made possible without decoupling the corresponding vehicle shafts from the actual control or drive mechanism of the vehicle.

Particularly preferably, a test stand system can be proposed, wherein the contact surface comprises at least one turntable for receiving a (vehicle wheel) wheel, in particular the receiving wheel of the wheel section (2) of the wheel drive device or, in a further development, a mounted rim; wherein the turntable is preferably designed to be rotatable or rotatable at least along a vertically oriented axis of rotation for simulating and/or measuring steering forces and/or for measuring the wheel angle. The turntable preferably has its own drive or is connected to a drive to generate the rotation.

A test stand system for testing at least one vehicle in stationary operation can be set up in such a way that only the hubs or wheels that cannot be driven by the vehicle are provided with a wheel drive device and are preferably driven thereby; and the hubs or wheels driven by the vehicle itself can be braked by controlling the vehicle brakes through an external brake control device (external to the vehicle) and can be synchronized with one another and/or with all other wheels. In other words, a test stand for testing vehicles, in particular in stationary operation, can be designed in such a way that only (exclusively) the non-driven wheels (or the respective hubs of the vehicle) are provided with a wheel drive machine or wheel drive device and the rest of the vehicle (Self) driven wheels can be braked and synchronized with the vehicle brakes, and for example have no wheel drive device (but, for example, a mounted rim) or a wheel drive device which does not have a motor for driving.

In order to also generate an efficient positioning of the vehicle on the contact area, self-propelled vehicle shaft and without additional use of drive rollers or belts, the claimed test stand system can also include in particular a series of fastening mechanisms, which preferably move the vehicle to be tested without movement within of the test stand system and can thus reduce any test inaccuracies caused by passive movements (e.g. vibrations caused by the movement of the vehicle body) to a minimum. In this respect, in a first preferred exemplary embodiment, the contact area of the test stand system can be equipped, for example, with a series of fixing elements which are attached to the contact area and can preferably be extended and retracted, for example dynamically controllable brake pads tet, which can be introduced between the latter for precise positioning of the vehicle wheels and can effectively fix the vehicle wheels by limiting the rolling surface.

In addition, in the present test bench system, instead of or in addition to the above-mentioned brake mechanics, it may also preferably be possible to use the fixing mechanisms already integrated in the vehicle to be tested for effective fixation of the vehicle. Thus, in a particularly preferred exemplary embodiment, the test stand system can, for example, be set up to connect in particular to the braking system of the vehicle to be tested and thus, by controlling the vehicle's internal vehicle brakes, at least the rolling of the vehicle wheels driven by the vehicle itself, i.e. actively driven .Block vehicle waves efficiently.

For this purpose, the claimed test stand system can, for example, preferably provide at least one brake control device, which can be positioned within the test stand system, for example equally in, under or at least along the contact surface, and in particular can be set up to externally control the vehicle brakes of the vehicle to be tested for the fixation mechanism described above head for. For this purpose, the brake control device can, for example, preferably be designed to be connectable to a brake cylinder of the vehicle at least, for example by connecting the latter by means of a hydraulic connecting hose or another hydraulic connecting element, so that the targeted control of the internal vehicle brakes made possible in this way allows for a selective control that can be carried out during the testing process Blocking of the vehicle tires is made possible by the internal vehicle brakes. In a particularly preferred exemplary embodiment, it may also be possible in particular for the brake control device, preferably together with the other device elements of the claimed test stand system, to also carry out the vehicle fixation automatically, for example by retrieving predefined process steps from a process memory present in the test stand system, In particular, a testing mechanism that is adapted to the various testing processes and can be individually adjusted can be generated. For a holistic automation of the test processes, a central control device can also preferably be integrated into the test stand system, which can preferably be connected to the individual device elements of the test stand system mentioned above, at least in terms of signals, and thus realizes a fully automated test stand operation by receiving and passing on any control signals. In this respect, the present test bench system can also be present in particular as a fully, but at least partially, automated test bench system.

The measuring system set up for the detection and analysis of corresponding vehicle functions, in particular ADAS functions, can preferably also be designed to be controlled automatically and in particular include a series of optical, electrical or mechanical sensor elements, which, preferably during the selective modification of the vehicle by the devices of the test bench system (e.g. while driving the vehicle by the wheel drive device or deflecting the vehicle wheels by means of the contact surface/turntables), the reactions of the vehicle to be tested, such as internal signaling, detector measurements or resulting mechanical interactions and forces within the vehicle, are detected and used for further analysis and Information output can be sent to an additional analysis device or at least to a display set up to view the detected information. Due to the additional area made usable by the claimed wheel drive device, it may also be possible for the test stand system, particularly in the immediate vicinity of the vehicle to be tested, to have a series of test specimens to simulate any obstacles that may occur in road traffic, such as street signs, passers-by, etc additional vehicles can be provided, so that the test processes described above can replicate and check real road traffic conditions even more precisely.

In order to be able to guarantee the conditions for measuring the electromagnetic immunity (“electromagnetic compatibility” - EMC) of existing vehicle elements that are integrated in modern testing systems, the present test stand system can also be designed in particular as an EMC system and can be used for this purpose - and warranty mechanics. For example, the measuring system described above can, preferably in addition to the above-mentioned device elements, also provide at least one antenna device set up to check electromagnetic immunity to interference, which can be set up to detect at least any electromagnetic (interference) radiation that occurs during the vehicle test, for example from electrical ones within the vehicle integrated vehicle elements, to be measured and forwarded as a detection signal, so that in particular each has a negative impact on the ADAS system Interactions affecting the vehicle being tested can be precisely recorded and minimized to improve the vehicle system. In order to be able to enable a particularly device-specific analysis, the previously described antenna device can also preferably be set up, for example by means of controllable focus elements, to examine both the entire vehicle to be tested for possible radiation, but in certain cases also only predefined vehicle elements of the vehicle Vehicle or clearly defined two- or three-dimensional areas within the test stand system to examine for outgoing at least electromagnetic interference emissions, so that the identification of any sources of interference or errors implemented in the vehicle can be made even more efficient.

In addition, in a particularly preferred exemplary embodiment, the present test stand system can also include at least one absorber chamber formed around the test area, that is to say at least around the vehicle to be tested, which can be explicitly set up to absorb external electromagnetic interference radiation from outside that is harmful to the EMC test process of the test stand system to block or absorb and thus further improve the accuracy of the integrated test device.

• - Positionieren eines zu prüfenden Fahrzeugs auf einer Aufstandsfläche des Prüfstandsystems, vorzugsweise auf entlang der Aufstandsfläche positionierten Drehtellern;
• - Anbringen der Radantriebsvorrichtung an das Fahrzeug durch Fixierung des Antriebsabschnitts der Radantriebsvorrichtung an eine Radnabe des Fahrzeugs, wobei der Radabschnitt der angebrachten Radantriebsvorrichtung auf der Aufstandsfläche aufliegt;
• - Antreiben der Radnabe durch den Antriebsabschnitt der Radantriebsvorrichtung relativ zu einer Bewegung dessen Radabschnitts;
• - Messen der Fahrzeugfunktionen durch das Messsystem des Prüfstandsystems während des Antreibens des Fahrzeugs durch die Radantriebsvorrichtung.

In this respect, it can be seen that, in particular, through the integration of the claimed wheel drive device, a vehicle test bench that is far more efficient, more versatile and, above all, more precise than the prior art can be provided, which, due to the elimination of any dangerous test rollers or belts, is not only more Not only does it provide security for additional device elements or operators, but it also enables extremely simple, easy-to-adjust and curve-capable verification of ADAS functions. The exact process sequences to be carried out to use the claimed device and system can also preferably correspond to those of the previously described functions of the wheel drive device mentioned and of the test stand system presented. Accordingly, the process steps that are equally stressed and generated by the present wheel drive device or the test bench system can also include at least one of the following steps:

• - Positioning a vehicle to be tested on a contact area of the test stand system, preferably on turntables positioned along the contact area;
• - Attaching the wheel drive device to the vehicle by fixing the drive section of the wheel drive device to a wheel hub of the vehicle, the wheel section of the attached wheel drive device resting on the contact surface;
• - driving the wheel hub by the drive section of the wheel drive device relative to a movement of the wheel section thereof;
• - Measuring the vehicle functions by the measuring system of the test bench system while driving the vehicle by the wheel drive device.

• - Anbringen der Radantriebsvorrichtung nur an von dem Fahrzeug nicht-antreibbaren Radnaben;
• - Blockieren der von dem Fahrzeug antreibbaren Räder durch Ansteuerung der Fahrzeugbremsen mittels der Bremssteuerungsvorrichtung;
• - Messen von während des Prüfungsprozesses erzeugen elektromagnetischen Strahlungen zumindest mittels einer in dem Prüfstandsystem integrierten Antennenvorrichtung.

Furthermore, further claimed process steps can include at least the following points:

• - Attaching the wheel drive device only to wheel hubs that cannot be driven by the vehicle;
• - Blocking the wheels that can be driven by the vehicle by controlling the vehicle brakes using the brake control device;
• - Measuring electromagnetic radiation generated during the testing process at least by means of an antenna device integrated in the test stand system.

Short description of the characters

• 1A : shows a first embodiment of the claimed wheel drive device in a vertical cross section, wherein the extension piece of the drive section is connected to the outside of the rotor element, thus forming an additional inner housing within the drive section;
• 1B : shows a second embodiment of the claimed wheel drive device in a vertical cross section, wherein the extension piece of the drive section is connected to the inside of the rotor element;
• 2A : shows a three-dimensional view of the wheel drive device 1A ;
• 2 B : shows a three-dimensional view of the wheel drive device 1B ;
• 3 : shows a schematic representation of an embodiment of the claimed test bench system, designed as an EMC test bench;
• 4 : shows a schematic representation of an embodiment of the wheel drive device which does not have its own drive.

Detailed description of preferred embodiments

Exemplary embodiments of the present invention are described in detail below using exemplary figures. The features of the exemplary embodiments can be combined in whole or in part and the present invention is not limited to the exemplary embodiments described.

The 1 and 2 show various embodiments of the wheel drive device 1 set up to drive a vehicle F to be tested in a vehicle test bench in a plurality of cross-sectional views. These show in more detail 1A and 2A a first embodiment of the claimed wheel drive device 1, each in a two- and three-dimensional cross-sectional view with a vertical cross-section, whereas the 1B and 2 B present a second embodiment in an equivalent representation.

The wheel drive device 1 of 1A and 2A For the above-mentioned purpose, at least the wheel section 2 is designed with a receiving wheel and is set up to carry the wheel drive device on the vehicle F to be tested, as well as the drive section 4 designed to rotatably drive a wheel hub of the vehicle F, which in the present exemplary embodiment is in particular as direct Internal rotor motor that can be connected to the wheel hub is shown.

In the present case, the receiving wheel of the wheel section 2 is initially composed of the rim 8 and the tire 6 clamped on it, which are firmly connected to the latter when the wheel drive device 1 is integrated into the wheel hub of the vehicle F to be checked and thus, analogously to the remaining vehicle tires of the vehicle F, which can transmit the forces generated by the vehicle F (e.g. weight forces) evenly to the body or other vehicle elements. In this respect, the additional introduction of the wheel section 2 into the vehicle F to be tested enables an extremely efficient imitation of the force distributions normally present within the vehicle F (i.e. in general road traffic), which means that a functional test, in particular a test of ADAS functions, can be carried out using the stressed wheel drive device can be carried out under extremely real vehicle conditions.

In order to be able to ensure a movable design of the drive section 4 that is both safe and necessary for driving a respective wheel hub, the wheel section 2 is also additionally equipped with the connecting element 10, which in the present case is centrally located in the rim 8 of the receiving wheel of the wheel section 2 introduced and is provided for integrating the drive section 4 at least into the wheel section 2, in particular with a plurality of radial bearings 13. The radial bearings 13 specifically form an annular or cylindrical guide structure, through which a part of the drive section 4, more precisely the extension piece 14, is inserted into the connecting element 10 at one end of the connecting element 10 for movable mounting of the drive section 4 and in a preferred case , at the other end of the connecting element, can be contacted with the wheel hub of the vehicle F to be tested, whereby both a suitable alignment and mounting of the drive section 4 in the wheel drive device 1 is ensured by means of the stressed wheel section 2.

On the other hand, as already noted, in the present exemplary embodiment, the drive section 4 is designed as an internal rotor motor connected to the wheel section 2, which in particular generates the advantage that the outer surface of the drive section 4 is present as a rigid, motionless structure and therefore no movable, potentially for outsiders System parts or processors reveal dangerous elements. More precisely, for this purpose, the drive section 4 comprises at least the stator element 12 defining the outer shape of the drive section 4, which in the wheel drive device 1 shown is specifically designed as an annular housing structure, is encased and by means of an additional, equally annular protective housing 11 which is connected to the wheel section 2 integrated drive mechanism is able to rotate a rotor of the corresponding rotor element 14 inserted within the stator element 12 to drive the wheel hub to be connected around a drive axle A shown.

The energy required for this is sent in particular via the lines 21 to a line element 20 specifically intended for this purpose and designed on the stator element 12, which is directly connected to the above-mentioned drive mechanism and preferably, by adjusting the energy flow within the stator element 12, equally through can regulate the driving forces generated by the drive section 4. Accordingly, the line element 20 in the present exemplary embodiment is primarily to be seen not only as a contact point for attaching the energy lines 21 to the drive section 4, but also as an energy control device integrated within the wheel drive device 1 device, which, preferably based on implemented control processes, can adapt the energy supplied to the stator element 12 and thus the driving forces generated by moving the rotor of the rotor element 14.

The type of energy to be used is not further limited in the present embodiment. In preferred exemplary embodiments, however, the energy supplied to the line element 20 can in particular be passed on to the drive section 4 as energy generated on an electrical, pneumatic or hydraulic basis, for example by introducing an electrical current or a hydraulic or pneumatic pressure, so that the drive mechanism and the design of the drive section 4 designed for this purpose can also change depending on the type of energy to be used. In this respect, it can be in the 1 and 2 The internal rotor motor shown can be designed, for example, as an electric motor provided with cable windings, but in other cases also as a pneumatic or hydraulic motor based on pressure, for example.

The rotor element 14 set up to drive the respective wheel hub further comprises, as already described, a rotor which is embedded in the stator element 12 and is equally annular and which is designed to be rotatable about the drive axis A within the stator element 12 by means of the previously mentioned drive mechanism and is therefore designed for movement The torque designed by the wheel hub to be driven is generated. As explicitly stated in the 1 and 2 As can be seen, the drive axle A is aligned in particular in such a way that it coincides with the axis of rotation of the wheel hub to be moved, so that the forces generated by the rotor element 14 can be passed on primarily directly and without further orientation elements to the drive shaft of the vehicle F to be tested. Since, due to the illustrated orientation of the rotor element 14, the orientation of the annular stator element 12 (ie at least one longitudinal axis of the stator element) is also aligned plane-parallel to the axis of rotation of the wheel hub and thus to the longitudinal axes of the receiving wheel of the wheel element 2, an extremely efficient device design is also achieved possible because the body of the drive section 4 can be brought as close and compact as possible to the receiving wheel of the wheel section 2.

In the present exemplary embodiment, the transmission of the rotary movement generated by the rotor of the rotor element 14 is also achieved by means of the extension piece 16 already mentioned and functioning as an intermediate connection between the wheel hub and the rotor of the rotor element 14. The latter extension piece is more precise in the one in the 1A and 2A For this purpose, the exemplary embodiment shown is designed as an equally ring-shaped or hole-cylindrical structure positioned radially within the rotor element 14, which, at one end, can be connected to the wheel hub of the vehicle F to be tested on a formed contact surface 18 and, at the other end, is attached to the rotor of the rotor element 14 by means of releasable fixing mechanisms (in the case shown using simple screw connections). In order to enable power transmission with as little loss as possible and a precise alignment of the drive section 4 to the wheel hub, at least part of the extension piece 16 is also rotatably mounted on bearing surfaces in the radial bearings 13 of the connecting element 10 of the wheel section 2, so that by moving the rotor of the Rotor element 14 and the resulting movement of the extension piece 16 (equally around the drive axle A), driving the wheel hub connected to the extension piece 16 is made possible, but the receiving wheel of the wheel section 2 remains completely stationary during the entire drive process.

If a respective wheel hub is to be driven by means of the present wheel drive device 1, the extension piece 16 connected to the rotor section 4 is first firmly connected to the wheel hub of the vehicle F, whereby, due to the previously described storage of the extension piece 16 in the connecting element 10 of the wheel section 2, the receiving wheel of the wheel section 2 is integrated into the vehicle F in a fixing manner. If the rotor of the rotor element 14 is then set in motion by means of the drive mechanism of the drive section 4, the extension piece 16 is also moved around the drive axle A based on the direct connection of the rotor to the extension piece 16 (and consequently the wheel hub of the vehicle F). and thus transfers, at the contact surface 18, a torque generated by the drive section 4 and adapted directly to the axis of rotation of the wheel hub to the wheel hub or the corresponding drive shaft of the vehicle F to be tested. In this respect, the previously described construction of the wheel drive device 1 results in a simultaneously extremely Energy-efficient, compact and, in particular, safe drive mechanism for testing a vehicle F in a test bench is provided, which, due to the direct contact with the wheel hub of the latter vehicle F, not only efficiently replace any dangerous roller and / or belt drives, but also ADAS tests at full functional steering mechanisms.

To further improve the drive control, in the embodiment shown the 1A and 2A , the wheel drive device 1 is additionally provided with the mechanical sensor device 22, which in the given case is designed as a mechanical rotary encoder positioned within the rotor element 14 and for the precise and selective movement of the wheel hub of the vehicle F, any drive properties of the wheel hub (for example the current rotational movement of the Wheel hub, torques generated by the rotor, etc.) and can be passed on to any control devices, for example the line element 20, for adapting the drive mechanics of the drive section 4. In this respect, with the aid of the sensor device 22 shown, it is in particular possible to generate a correction mechanism integrated within the wheel drive device 1, which, by measuring certain movement properties of the wheel hub or the drive section 4 using the sensor device 22, detects potential inaccuracies during the drive process and efficiently by adjusting any Can correct control protocols or parameters.

For precise measurement of the above-mentioned drive properties, the integrated rotary encoder of the sensor device 22 is connected to the extension piece 16 and thus the wheel hub by means of a transmission element 24 which is also positioned within the rotor element 14, in this case designed as a rotatable connecting rod which rests equally centrally on the drive axle A of the vehicle F to be tested. If the wheel hub is driven by the drive section 4 by means of the drive mechanism described above, the transmission element 24 also rotates with the rotational movement of the extension piece 16 or the wheel hub and can thus change the respective drive properties, for example by translating the rotation of the transmission element 24 into a transmission implemented within the sensor device 22, to the sensor device 22. The latter is also able to analyze the transmitted rotational movement by means of sensor elements also integrated in the sensor device 22 and to transmit it as adaptation information to the previously described control elements.

The 1B and 2 B also show a further embodiment of the wheel drive device 1 described, in which, in comparison to the exemplary embodiment 1A and 2A , the connection structure between the extension piece 16 and the rotor of the rotor element 14 of the drive section 4 has been changed. The first embodiment looks more precise 1A and 2A In particular, the extension piece 19 is explicitly fixed to the rotor on the radial outside, that is, on the side of the rotor facing away from the vehicle F and/or the wheel hub, by means of an annular flange 27, so that the extension piece 19 in particular covers the entire inner surface of the drive section 4 forms a casing spanning and thus enables improved protection of the underlying rotor element 14. In comparison, the fixation of the extension piece 19 on the rotor is the same 1B and 2 B In the embodiment shown, however, it is provided on the radial inside, that is, on the side of the rotor that is aligned with the vehicle F or with the wheel hub, whereby the force arm acting on the wheel hub due to the rotary movement of the rotor is further shortened and thus the torque to be used is even more direct and loss-free can be passed on to the wheel hub.

The 3 also shows a schematic representation of an embodiment of a test bench system P that is equally stressed and uses the wheel drive device 1, in which a vehicle F to be tested is tested for predefined vehicle functions, in particular ADAS functions.

The test stand system P provides at least one contact surface 100 on which the vehicle F to be tested, more precisely, the respective vehicle wheels of the vehicle F, is positioned and on which the vehicle F is analyzed by means of a measuring system (not shown) which is equally integrated within the test stand system P becomes.

In order to ensure a suitable drive of the drive shafts of the vehicle F, in the present system the four wheel hubs present on the vehicle F have each been provided with one of the previously described wheel drive devices 1, so that the drive mechanism already mentioned above enables direct movement of the respective ones Drive shafts can be made possible. In further exemplary embodiments, however, it may also be equally possible for the wheel drive device 1 to be integrated only on predefined wheel hubs, for example the wheel hubs that cannot be actively driven by the vehicle's own motor, so that any problems caused by the drive are eliminated by decoupling the external drive from the vehicle transmission Feedback damage can be effectively avoided.

In order to also provide the energy required for the wheel hub drive, the present test stand system P further comprises a series of motor devices explicitly embedded in or under the contact surface, which are connected to the Lei Device element 20 of the wheel drive device 1, preferably freely movable energy lines 21, enable a constant energy supply that is also set up for mobile positioning of the wheel drive devices 1. More specifically, the test bench system P shown or the motor device for this purpose provides a combination of motor 110a/110b and hydraulic pump 112a/112b, so that the energy lines 21 in this case are designed as hydraulic hoses and by means of the respective motors 110a/110b driven pumps 112a/112b, predefined hydraulic pressures set up for selective movement of the wheel hub can be introduced into the wheel drive device 1. The construction described above generates the particular advantage that the non-electric drive type of the claimed wheel drive device 1 avoids any electrical interference radiation and thus the test processes to be used, in particular for testing EMC properties within the vehicle F, can be carried out even more precisely. The regulation of the corresponding amounts of energy to be used (here, for example, the strength of the hydraulic pressure) is, as already mentioned, preferably ensured by the control device integrated in the respective wheel drive device 1. In cases of larger test bench systems P, in particular equipped with a plurality of wheel drive devices 1 to be used, it may also be possible to carry out respective adaptation processes, in particular together with the control of further test mechanisms (e.g. control of the measuring system), centrally, for example by a centralized control unit , to be carried out, which also allows an extremely effective automation process to be generated within the claimed test bench system P.

Further advantages of the integrated wheel drive devices 1 also arise from the freely movable properties of the wheel hubs connected to them or the recording wheels integrated in the wheel drive device 1: Since the drive of the vehicle shafts to be used in the present test bench system P is directly on the wheel hub of the vehicle F is contacted and the vehicle F continues to have a pick-up wheel provided by the wheel section 2 and supporting the vehicle body, the test stand shown does not require any further drive elements that limit the vehicle functions (e.g. a roller drive that prohibits steering of the vehicle), so that the pick-up wheels provided by the wheel section 2 can still be moved freely and to simulate any movement functions, such as checking automatic parking aids or lane assistance systems.

In order to be able to use this advantage in the present test stand system P, the contact area 100 of the test stand shown is further provided with one or a plurality of turntables 102, on which a respective vehicle wheel of the vehicle F to be tested is positioned and by means of mechanisms integrated in the turntable 102 can be deflected to simulate predefined steering or adjustment movements. For example, this is what they see in 3 shown turntable 102 to pivot the vehicle wheels of the wheel drive device 1 placed on it and connected to the vehicle F at least about a vertical axis of rotation V, so that an extremely simple imitation of respective vehicle steering movements can be carried out in the test stand system P shown. In further exemplary embodiments, however, it may also be possible to move selected turntables 102 not only about a vertical axis V, but also about at least one horizontal rotation or even pivot axis, so that any shear forces that may occur in driving processes can also be efficiently simulated. In addition, since the positioned vehicle wheels, due to the drive mechanism shown, are fixed throughout the entire drive by the wheel drive device 1, no further vehicle fixations are necessary during the above-mentioned process. In preferred exemplary embodiments, however, in order to support the prevention of any rolling processes of the vehicle F, additional fixing devices can also be inserted on the contact surface 100 or the turntables 102 or the vehicle F can be fixed at a predefined position using the brake control device described above via the vehicle's internal brakes.

In order to be able to be used equally for any EMC testing processes, the in 3 The test stand system P shown is further formed within the absorber chamber 108, which absorb any externally generated electromagnetic waves or radiation by means of a large number of electrically conductive absorbers attached to walls that completely enclose at least the vehicle F and thus provide a closed test system that is electromagnetically separated from the environment. and measuring environment ensures. In order to be able to detect the electromagnetic compatibility of various vehicle elements, the present test bench system P further comprises at least the antenna device 106, designed as a controllable, adjustable and focusable antenna, which is set up to detect any of selected vehicle elements or at least to identify at least the (interference) emissions emanating from the entire vehicle F and to transmit them to the measuring system, for example an evaluation device implemented in the measuring system, for further analysis.

In 4 a preferred embodiment of the wheel drive device 1 is shown, which essentially corresponds to the embodiment in 2A or 2 B corresponds but is not equipped with its own drive. The modified wheel drive device (or mounted rim) can be used in particular to connect wheel hubs of the vehicle which can be or are driven by the vehicle itself. Depending on the vehicle to be tested (rear-wheel drive, front-wheel drive, all-wheel drive, etc.), a combination of wheel drive device 1 with and without drive (motor or internal rotor motor) can be used. The connection of the wheel drive device 1 shown can be achieved, for example, via the connection flange 5. According to one aspect of an embodiment, a test stand for testing at least one vehicle F in stationary operation is thus proposed. The test stand is set up in such a way that only (exclusively) the wheels (or wheel hubs that cannot be driven) that are not driven by the vehicle F are provided with a driven wheel drive device 1 and are driven; and the wheels driven by the vehicle F itself can be braked and synchronized by means of a non-drive wheel drive device 1 and control of the vehicle brakes by an external brake control device.

In addition, the following aspects are proposed according to the invention.

A wheel drive device 1 for driving at least one vehicle F in stationary operation for a vehicle test bench, in particular an ADAS test bench, comprising a wheel section 2 equipped with at least one receiving wheel, a drive section 4 connected to the wheel section 2 for rotationally driving a wheel hub of the vehicle by at least one Drive axle A, wherein the drive section 4 is designed to be attachable to the wheel hub of the vehicle F and the drive section 4 is rotatably mounted on the wheel section 2.

The drive section 4 can include at least one rotor element 14 and a stator element 12 and the stator element 12 can be connected to the wheel section 2 and the rotor element 14 can be designed to be fixable on the wheel hub of the vehicle F.

The wheel drive device 1 according to at least one of the preceding aspects, wherein the stator element 12 forms an annular housing 11 in which the rotor element 14 is movably positioned, and the rotor element 14 is set up to rotate at least parallel to the drive axis A of the wheel hub within the stator element 12 and to drive the wheel hub by means of the rotary movement.

The wheel drive device 1 according to at least one of the preceding aspects, wherein the wheel drive device further comprises a sensor device 22 for detecting at least one rotational movement of the wheel hub, the sensor device 22 being connected to the wheel hub via a rotatable transmission element 24, which is set up with the rotational movement of the wheel hub to rotate along at least the drive axle A, and the sensor device 22 is set up to detect the rotational movement of the wheel hub by detecting the rotation of the rotatable transmission element 24.

The wheel drive device 1 according to at least one of the preceding aspects, wherein the sensor device 22 is connected at least to both the rotor element 14 and / or the wheel hub and the stator element 12, and the sensor device 22 is set up to detect the rotational movement of the wheel hub relative to the movement of the stator element 12 and / or the wheel section 2 to detect.

The wheel drive device 1 according to at least one of the preceding aspects, wherein the wheel section 2 comprises at least one connecting element 10 for releasably integrating the drive section 4 into the wheel section 2, wherein the connecting element 10 comprises at least one bearing 13 and the connecting element 10 for integrating the drive section 4 into the Wheel section 2, the rotor element 14 of the drive section 4 is rotatably supported in the at least one radial bearing 13.

The wheel drive device 1 according to at least one of the preceding aspects, wherein the stator element 12 of the drive section 4 is firmly connected to the connecting element 10 of the wheel section 2, and the rotor element 14 comprises at least one protruding extension piece 16, which is inserted into the at least one bearing 13 of the connecting element 10 insertable bearing surface, and wherein the extension piece 16 forms a contact surface 18 for contacting the rotor element 14 with the wheel hub.

The wheel drive device 1 according to at least one of the preceding aspects, wherein the drive section 4 has at least one line element 20 for supplying the drive section 4 with energy, the drive section 4 being driven electrically, pneumatically and/or hydraulically.

A test stand system P for functional testing of a vehicle F in stationary operation, in particular for testing ADAS functions of a motor vehicle, comprising at least one contact area 100 for positioning the vehicle F to be tested in the test stand system P, for measuring vehicle functions, in particular ADAS functions, set up measuring system, and at least one wheel drive device 1 according to at least one of the preceding aspects, wherein the at least one wheel drive device 1 for driving a wheel hub of the vehicle F to be tested is attached to at least one wheel hub, the wheel section 2 of the attached wheel drive device 1 being on the contact surface 100 is contacted.

The test bench system P according to at least one of the preceding aspects, wherein the contact surface 100 comprises at least one turntable 102 for receiving a wheel, in particular the receiving wheel of the wheel section 2 of the wheel drive device 1, wherein the turntable 102 for simulating and / or measuring steering forces and for Measuring the wheel angle is designed to be rotatable at least along a vertically aligned axis of rotation V, and for this purpose the turntable is preferably connected to a drive.

The test bench system P according to at least one of the preceding aspects, wherein the test bench system P comprises at least one brake control device for externally controlling the vehicle brakes of the vehicle F to be tested, the brake control device being designed to be connectable to at least one brake cylinder of the vehicle F and the brake control device being set up to control the vehicle brakes of the vehicle F according to predefined process steps.

The test bench system according to at least one of the preceding aspects, wherein the measuring system for checking electromagnetic immunity additionally comprises at least one antenna device 106 for measuring electromagnetic radiation occurring during vehicle testing and/or an absorber chamber 108 for absorbing external electromagnetic radiation, wherein the antenna device 106 is set up to detect the electromagnetic radiation emanating from the entire vehicle F to be tested and/or from predefined elements of the vehicle F.

Test stand system for testing at least one vehicle F in stationary operation, the test stand system being set up in such a way that only the wheels not driven by the vehicle F are provided with a wheel drive device 1 and are driven and the wheels driven by the vehicle F itself are driven by means of control the vehicle brakes can be braked and synchronized by an external brake control device.

Method for functional testing of a vehicle F, in particular for testing ADAS functions of a motor vehicle, in stationary operation using the test bench system P according to at least one of the preceding aspects, the method comprising the steps of positioning the vehicle F on the contact area 100, preferably along the contact area 100 positioned turntables 102, attaching the wheel drive device 1 to the vehicle F by fixing the drive section 4 of the wheel drive device 1 to at least one wheel hub of the vehicle F, the wheel section 2 of the attached wheel drive device 1 resting on the contact surface 100, driving the wheel hub through the drive section 4 relative to a movement of the wheel section 2, measuring the vehicle functions by the measuring system while the vehicle F is being driven by the wheel drive device 1.

The method according to at least one of the preceding aspects further comprising the steps of attaching the wheel drive device 1 only to wheel hubs that cannot be driven by the vehicle F, braking the wheels that can be driven by the vehicle F by externally controlling the vehicle brakes using the brake control device, measuring during the testing process electromagnetic radiation by means of at least one antenna device 106 integrated in the test stand system FP.

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed 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.

Cited patent literature

• GB 2557252 A [0003]

Claims (15)

Wheel drive device (1) for driving at least one vehicle (F) in stationary operation for a vehicle test bench, comprising: - a wheel section (2) equipped with at least one pickup wheel; - a drive section (4) connected to the wheel section (2) for rotationally driving a wheel hub of the vehicle (F) about at least one drive axle (A); wherein the drive section (4) is attachable to the wheel hub of the vehicle (F); and the drive section (4) is rotatably mounted on the wheel section (2). The wheel drive device (1) according to Claim 1 , wherein the drive section (4) comprises at least a rotor element (14) and a stator element (12); and the stator element (12) is connected to the wheel section (2) and the rotor element (14) is designed to be fixable on the wheel hub of the vehicle (F). The wheel drive device (1) according to Claim 2 , wherein the stator element (12) forms an annular housing (11) in which the rotor element (14) is movably positioned; and the rotor element (14) is set up to rotate at least parallel to the drive axis (A) of the wheel hub within the stator element (12) and to drive the wheel hub by means of the rotary movement. The wheel drive device (1) according to at least one of the preceding claims, wherein the wheel drive device further comprises a sensor device (22) for detecting at least one rotational movement of the wheel hub; where the sensor device (22) is connected to the wheel hub via a rotatable transmission element (24), which is set up to rotate along at least the drive axle (A) with the rotational movement of the wheel hub; and the sensor device (22) is set up to detect the rotational movement of the wheel hub by detecting the rotation of the rotatable transmission element (24). The wheel drive device (1) according to at least Claim 2 , wherein the sensor device (22) is connected at least to both the rotor element (14) and / or the wheel hub and the stator element (12); and the sensor device (22) is set up to detect the rotational movement of the wheel hub relative to the movement of the stator element (12) and/or the wheel section (2). The wheel drive device (1) according to at least Claim 2 , wherein the wheel section (2) comprises at least one connecting element (10) for releasably integrating the drive section (4) into the wheel section (2); wherein the connecting element (10) comprises at least one bearing (13); and the connecting element (10) for integrating the drive section (4) into the wheel section (2), the rotor element (14) of the drive section (4) is rotatably supported in the at least one radial bearing (13). The wheel drive device (1) according to at least Claim 6 , wherein the stator element (12) of the drive section (4) is firmly connected to the connecting element (10) of the wheel section (2); and the rotor element (14) comprises at least one projecting extension piece (16), which forms a bearing surface that can be inserted into the at least one bearing (13) of the connecting element (10); and wherein the extension piece (16) forms a contact surface (18) for contacting the rotor element (14) with the wheel hub. The wheel drive device (1) according to at least one of preceding claims, wherein the drive section (4) comprises at least one line element (20) for supplying the drive section (4) with energy, wherein the drive section (4) is driven electrically, pneumatically and/or hydraulically. A test stand system (P) for functional testing of a vehicle (F) in stationary operation, in particular for testing ADAS functions of a motor vehicle, comprising: - at least one contact surface (100) for positioning the vehicle (F) to be tested in the test stand system (P) ; - a measuring system set up to measure vehicle functions, in particular ADAS functions; and - at least one wheel drive device (1) according to Claim 1 , wherein the at least one wheel drive device (1) for driving a wheel hub of the vehicle (F) to be tested is attached to at least one wheel hub, the wheel section (2) of the attached wheel drive device (1) being contacted on the contact surface (100). The test stand system (P) according to at least Claim 9 , wherein the contact surface (100) comprises at least one turntable (102) for receiving a wheel, in particular the receiving wheel of the wheel section (2) of the wheel drive device (1); wherein the turntable (102), for simulation and/or measurement Solution of steering forces and for measuring the wheel angle, is designed to be rotatable at least along a vertically aligned axis of rotation (V), and the turntable is preferably connected to a drive for this purpose. The test stand system (P) according to at least one of the preceding claims, wherein the test stand system (P) comprises at least one brake control device for externally controlling the vehicle brakes of the vehicle (F) to be tested; where the brake control device is designed to be connectable to at least one brake cylinder of the vehicle (F); and the brake control device is set up to control the vehicle brakes of the vehicle (F) according to predefined process steps. The test stand system according to at least one of the preceding claims, wherein the measuring system for checking electromagnetic immunity additionally comprises at least one antenna device (106) for measuring electromagnetic radiation occurring during vehicle testing and/or an absorber chamber (108) for absorbing external electromagnetic radiation; where the antenna device (106) is set up to detect the electromagnetic radiation emanating from the entire vehicle (F) to be tested and/or from predefined elements of the vehicle (F). Test stand system for testing at least one vehicle (F) in stationary operation, wherein the test stand system is set up in such a way that only the wheels that are not driven by the vehicle (F) are provided with a wheel drive device (1) and are driven; and the wheels driven by the vehicle (F) itself can be braked and synchronized by controlling the vehicle brakes by an external brake control device. Method for functional testing of a vehicle (F), in particular for testing ADAS functions of a motor vehicle, in stationary operation using the test bench system (P). Claim 9 , the method comprising the steps: - positioning the vehicle (F) on the contact area (100), preferably on turntables (102) positioned along the contact area (100); - Attaching the wheel drive device (1) to the vehicle (F) by fixing the drive section (4) of the wheel drive device (1) to at least one wheel hub of the vehicle (F), with the wheel section (2) of the attached wheel drive device (1) on the contact surface (100) rests; - Driving the wheel hub by the drive section (4) relative to a movement of the wheel section (2); - Measuring the vehicle functions by the measuring system while the vehicle (F) is being driven by the wheel drive device (1). The procedure according to Claim 14 further comprising the steps: - attaching the wheel drive device (1) only to wheel hubs that cannot be driven by the vehicle (F); - Braking the wheels that can be driven by the vehicle (F) by externally controlling the vehicle brakes using the brake control device; - Measuring electromagnetic radiation generated during the testing process by means of at least one antenna device (106) integrated in the test stand system (FP).

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