Roller assembly, vehicle test stand comprising at least one roller assembly, and method for operating such a vehicle test stand

Abstract

The invention relates to a roller assembly (100) for a vehicle test stand (1000), having a vertical axis (Z), a transverse axis (Y), and a longitudinal axis (X). The roller assembly (100) comprises a support (10); and a roller set (12) arranged on the support (10), comprising rollers (14, 16) which are arranged parallel to one another and which form a horizontal wheel receiving area. A lifting bar (50) which can be moved in the direction of the vertical axis (Z) is arranged in a clear free space (20) between the two rollers (14, 16), said lifting bar (50) having a floating plate (60) on the upper face. The invention additionally relates to a vehicle test stand (1000) comprising at least one such roller assembly (100), to a method for operating such a vehicle test stand (1000), to a computer program product, to a computer program, and to a computer-readable medium.

Description

[0001] Description

[0002] title

[0003] Roller assembly, vehicle test bench with at least one roller assembly and method for operating such a vehicle test bench

[0004] State of the art

[0005] The invention relates to a track roller assembly, a vehicle test bench with at least one track roller assembly and a method for operating such a vehicle test bench.

[0006] EP 1143219 B1 discloses a method and device for positioning a vehicle on a vehicle test bench for measuring and adjusting the toe and camber angles of the wheels. The wheels each rest on two rollers, for example, forming a horizontal wheel support. For lateral positioning of the vehicle, the respective wheel support is mounted so that it can rotate about a pivot point and is positioned relative to the respective wheel plane by rotating about the pivot point.

[0007] Disclosure of the invention

[0008] One object of the invention is to create a flexibly deployable roller assembly. Another object of the invention is to create a vehicle test bench with at least one flexibly deployable roller assembly.

[0009] A further object of the invention is to provide a method for operating such a vehicle test bench with at least one flexibly usable roller assembly.

[0010] The objects are achieved by the features of the independent claims. Advantageous embodiments and advantages of the invention emerge from the further claims, the description, and the drawings.

[0011] A roller assembly for a vehicle test bench having a vertical axis, a transverse axis, and a longitudinal axis is proposed, comprising (a) a support; and (b) a roller set arranged on the support with rollers arranged parallel to one another, which form a horizontal wheel receptacle, wherein a lifting sleeper movable in the direction of the vertical axis is arranged in a clear space between two of the rollers, and the lifting sleeper has a floating plate on its upper side.

[0012] Optionally, the roller assembly can have a drive unit for driving at least one roller of the roller set, in particular an electric motor. This can be integrated into a roller or be a separate unit. The drive unit can be connected to the roller set in a rotationally fixed manner. In this case, the drive unit can rotate with the roller set if the roller set is rotated about the vertical axis. Alternatively, the drive unit can be connected to the roller set via a coupling so that the roller set can be rotated relative to the drive unit but can remain operatively connected. In this case, the drive unit can be arranged on the support or on a base frame on which the roller assembly is arranged during normal use. The lifting threshold itself serves to ensure problem-free driving over the roller set of the roller assembly.Because the lifting sleeper has a floating plate on its upper side, which can come into contact with the vehicle's wheel, the roller assembly advantageously allows a combination of functions from two different test benches.

[0013] Advantageous savings are possible because various devices, such as the base frame of the vehicle test bench, only need to be installed once. The roller assemblies also only need to be installed on the single test bench, and a test bench control system only needs to be maintained once.

[0014] Firstly, the vehicle test bench is a roller test bench in which the wheels of at least one vehicle axle are driven, braked, or can run freely via the rollers. This can be carried out in the usual way for roller testing, which involves a general functional test of the vehicle in dynamic test mode, for transmission function testing, for testing the vehicle's braking system, for acceleration and deceleration tests under road-like conditions, and for testing various sensors in the vehicle, such as sensors of an anti-lock braking system (ABS), sensors of an electronic stability program (ESP), sensors of an acceleration skid control system (ASR), and the like.

[0015] Secondly, the vehicle test bench also serves as a chassis test bench, where a turnaround measurement is carried out on the chassis and chassis adjustment can be carried out. The floating plate of the lifting sleeper is used for this purpose. Key chassis geometry parameters are the individual track angles and overall toe angles, the camber angles, and the caster angles. The individual toe angles of the rear axle determine the vehicle's direction of travel. The vehicle height can also be determined. In particular, the exact position of the highest position of the wheel house edge can be determined. A vehicle axle with the wheels can be free of mechanical stresses by the floating plate of the lifting sleeper adjusting its rotational and translational position accordingly. This is particularly advantageous when measuring the vehicle. It enables area-based 3D measurement technology on the wheel as well as optionally contactless vehicle positioning.Thanks to the floating plate integrated into the lifting threshold, the wheel hubs can rotate the wheels free from lateral forces and allow the track and camber adjustment on the stationary wheel without any significant resistance.

[0016] In a conventional chassis test bench, the roller set is typically mounted on a floating plate. However, because the floating plate is integrated into the lifting sleeper, which can be moved back and forth along the vertical axis, either the roller set or the floating plate can be used for tests on the same vehicle test bench.

[0017] The floating plate integrated into the lifting sleeper represents a smaller floating plate compared to the state of the art. Adjustment and measurement of chassis properties are carried out in the raised state on the floating plate or lifting sleeper.

[0018] To achieve this, the distance between the two rollers between which the lifting bar is arranged is sufficiently large to ensure secure positioning of a wheel on the lifting bar or the floating plate. It can be advantageous if the floating plate is arranged on at least one side of the lifting bar. Preferably, this is the side corresponding to the inside of the wheel, where adjustments can be made, for example, to a vehicle's tie rod. This positioning makes tie rods near the inside of the wheel, for example, easier to access.

[0019] The roller dynamometer and chassis dynamometer functions can be performed in any order or alternatively. Likewise, each individual test function can be repeated if necessary.

[0020] In this way, a track roller assembly can be created for a vehicle test bench, which is also advantageous for small series, where only a relatively small number of vehicles are produced and then tested after assembly. This is especially true for electric vehicles. For these vehicles, battery charging behavior at moderate speeds is of particular interest. For this purpose, the wheels are conveniently driven at approximately 80-90 km / h during a track test.

[0021] The modular design allows for customized use. Furthermore, the vehicle test bench can be expanded if necessary.

[0022] Advantageously, precise measurements or determinations of chassis parameters such as toe, camber, height, caster, and the like can be performed, as well as precise adjustment of the chassis parameters. For precise measurement of the chassis geometry on the outside of the tire, while simultaneously taking rim runout into account, the vehicle wheels can be rotated evenly. This can advantageously be done at a low speed, for example, 5 km / h, preferably 2 km / h, and particularly preferably in the range of 1-2 km / h. This is achieved with the help of the driven rollers. Depending on the vehicle, the speed can also be higher.

[0023] According to a favorable design of the roller assembly, a positioning device can be provided that guides the lifting threshold, in a lowered state, at least in the direction of the transverse axis, into a home position and / or fixes it in a home position. Advantageously, the position of the lifting threshold can be reliably adjusted in the lowered state. This simultaneously establishes the position of the floating plate in a defined, reproducible manner. This advantageously allows a home position for the lifting threshold to be defined. Advantageously, the lifting threshold can be reliably returned to the defined home position upon deflection of the lifting threshold.

[0024] According to a favorable design of the roller assembly, the roller set and the lifting sleeper with the floating plate can be mounted together on a rotating device. This allows the roller set to be steered for a rolling test. This can be done actively, for example, by detecting the position of the vehicle's wheels and / or steering wheel on the roller assembly and rotating the rotating device accordingly.

[0025] According to a favorable embodiment of the track roller assembly, the lifting sleeper can have a receiving unit on which the floating plate is mounted in a floating manner. In particular, the floating plate can form at least part of a surface of the lifting sleeper. The floating plate can occupy the entire upper surface of the lifting sleeper. Alternatively, the upper surface can have a rigid segment, to which the floating plate is connected in the direction of the transverse axis.

[0026] According to a favorable embodiment of the roller assembly, the receiving unit of the lifting sleeper can have at least one recess into which the floating plate engages with at least one guide pin. In particular, a boundary of the at least one recess can form a stop when the floating plate rotates about the vertical axis. Thus, a rotational movement of the floating plate about the vertical axis can be easily limited.

[0027] According to a favorable embodiment of the track roller assembly, the receiving unit can have at least one elongated hole extending in the direction of the transverse axis, into which the floating plate engages with a guide pin. In particular, a boundary of the elongated hole can form a stop when the floating plate is displaced in the direction of the transverse axis. Thus, a translational movement of the floating plate in the direction of the transverse axis can be easily limited.

[0028] Advantageously, the elongated hole can be arranged in the direction of the transverse axis between two recesses, which form a stop when the floating plate rotates about the vertical axis. In particular, the recesses and elongated hole are arranged on a straight line in the direction of the transverse axis.

[0029] According to a favorable embodiment of the track roller assembly, the floating plate can have at least one stop for securing a wheel along the longitudinal axis on the floating plate. In particular, the floating plate can have an indentation, the boundaries of which each form a stop along the longitudinal axis. This can advantageously be provided on a track roller assembly intended for a rear axle. Instead of an indentation, a protrusion or a corresponding contour can also be provided on the floating plate. The wheel can be secured even with a relatively small stop height.

[0030] According to a favorable design of the roller assembly, the rotating device for rotating the roller set and lifting sleeper around the vertical axis can be equipped with a spindle lifting cylinder. Alternatively, the rotating device for rotating the roller set and lifting sleeper around the vertical axis can be equipped with a toothed gear. Alternatively, the rotating device for rotating the roller set and lifting sleeper around the vertical axis can be equipped with a toothed belt. This allows for a robust and easy-to-use rotating device to be created as required.

[0031] According to a favorable design of the track roller assembly, a displacement device can be provided with which the carrier with the roller set and the lifting sleeper can be displaced in the direction of the longitudinal and transverse axis. On the one hand, the displacement device can be used to adjust the track width, with the help of which the vehicle test bench can be set to the track width of the vehicle to be tested. On the other hand, the displacement device can be used to change the position of the track assembly and thus of the floating plate relative to the vehicle or relative to the wheel. This allows the position of the lifting sleeper under the vehicle wheel to be changed so that either a rigid segment of the surface of the lifting sleeper is placed under the wheel or the floating plate is positioned under the wheel.According to an advantageous design of the track roller assembly, the clear space between the track rollers can be at least 100 mm, in particular at least 250 mm. Advantageously, the space between the track rollers can be matched to a typical wheel diameter of the vehicles to be tested on it. The clear space can be dimensioned such that the respective wheel rests securely on the track rollers when the lifting threshold is lowered. For a typical passenger car, for example, a favorable clearance is at least 100 mm, in particular at least 250 mm. For a typical commercial vehicle, the clearance can advantageously be between 300 mm and 400 mm, for example. The floating plate can be large enough to securely place the vehicle wheel on it without interference from the track rollers on either side.

[0032] An optional adjustment device can be provided to variably adjust the clearance between the two rollers. This allows the roller assembly to be adapted to different wheel sizes.

[0033] According to a favorable design of the roller assembly, the extension of the lifting beam along the longitudinal axis can be at least 90 mm, in particular at least 100 mm. The extension along the longitudinal axis can be expediently selected to provide a sufficient tire contact surface, allowing the wheel of the vehicle being tested to rest securely on the lifting beam and allowing the lifting beam to move up and down within the free space without interference from the rollers.

[0034] According to a favorable embodiment of the roller assembly, a drive unit for driving the roller set can be arranged stationary relative to the roller set. Alternatively or additionally, a drive unit for driving the roller set can be arranged stationary relative to the support. In this case, the drive unit can be connected to the roller set by a coupling. If the lifting sleeper is rotated by means of the rotating device, the coupling can ensure the power transmission from the drive unit to the roller set. Alternatively or additionally, at least one of the rollers can have a roller motor that directly drives the at least one roller. The arrangement and type of drive unit can be selected to suit the requirements.

[0035] According to a further aspect of the invention, a vehicle test bench is proposed with at least one roller assembly which is arranged in a roadway for receiving a vehicle, with a control and / or regulating unit for controlling components and / or for detecting sensor signals from sensor units present on the vehicle test bench.

[0036] The roller assembly comprises (a) a support; (b) a roller set arranged on the support with rollers arranged parallel to one another, which form a horizontal wheel receptacle, wherein a lifting sleeper movable in the direction of the vertical axis is arranged in a clear space between two of the rollers and the lifting sleeper has a floating plate on its upper side.

[0037] Advantageously, a vehicle test bench is provided that combines the functions of two conventional test benches, namely the function of a roller test bench and the function of a chassis test bench. The testing of the vehicle on the vehicle test bench can be automated or partially automated. Advantageously, the control and / or regulation unit can have appropriate automation software that includes the functionalities of system control, management of the drive units of the respective roller set and the displacement device of the respective track roller assembly, as well as interface handling for the roller test and the chassis test.In particular, the control and / or regulating device may comprise a processor or a computer or be coupled to a computer, wherein the processor or the computer software for operating the vehicle test bench for testing and adjusting a vehicle with at least one roller assembly and for executing steps for operating the vehicle test bench in the various test phases.

[0038] It is advisable to provide a roller assembly for each wheel of the vehicle.

[0039] Using measurement technology, especially non-contact measurement technology, precise measurements of chassis parameters such as track, camber, vehicle height, caster, etc. can be performed. Precise adjustment of chassis parameters can also be performed.

[0040] For precise measurement of the chassis geometry on the outside of the tire, while simultaneously taking into account rim runout, the vehicle wheels can be rotated evenly. This is achieved using driven pairs of rollers in the roller set.

[0041] The vehicle's position can be measured, for example, using a laser measuring system, where measurement and positioning can be performed with rotating wheels. The vehicle can be positioned by deflecting the roller assemblies with the lifting beam lowered, particularly with a motorized control, until the distance between the wheels and the measuring system is equal on both sides.

[0042] To hold the vehicle in place during adjustment, the floating plates can optionally be equipped with brakes. These can prevent the vehicle from accidentally moving from a stable position on the roller assembly.

[0043] Depending on the vehicle test bench's design, devices for directly or indirectly recording the vehicle's rolling behavior and / or static or dynamic braking behavior can be included. For example, indirect recording can be achieved via inverter data from the roller drive, such as the electrical current through the drive unit of the rollers. Alternatively, force and / or torque sensors can also be used.

[0044] According to a favorable design, the vehicle test bench can include devices for directly or indirectly measuring the toe and camber angle, the track width, and / or the chassis geometry and / or chassis parameters of the vehicle and / or the vehicle geometry. Advantageously, the vehicle's height can be measured, in particular the exact position of the highest point of the wheel house edge and the like. For example, optical measuring systems can be used.

[0045] In particular, devices can be provided that would otherwise have to be provided separately in a separate roller dynamometer and chassis dynamometer. For example, an adjustment device for adapting the distance between the roller assemblies to the vehicle's wheelbase only needs to be provided once, and ultrasonic sensors on the roller assemblies for determining the vehicle's position can be omitted. In a favorable design of the vehicle dynamometer, an adjustment device for adapting the distance between the roller assemblies to a wheelbase can be provided. For example, the roller assemblies assigned to a vehicle axle can be moved in the direction of the longitudinal axis in the vehicle dynamometer in order to set the correct distance between the roller assemblies according to the actual wheelbase of the vehicle.

[0046] According to a further aspect of the invention, a method for operating a vehicle test bench for testing a vehicle with at least one roller assembly is proposed. The roller assembly has a support and a roller set arranged on the support, with rollers arranged parallel to one another, forming a horizontal wheel receptacle, and a lifting sleeper movable in the direction of a vertical axis is arranged in a clear space between two of the rollers. The vehicle is positioned in a retracted position with at least one wheel of at least one of its axles between the rollers on the roller set above the lifting sleeper.

[0047] The vehicle test bench comprises at least one roller assembly arranged in a track for supporting a vehicle, as well as a control and / or regulating unit for controlling components and / or for detecting sensor signals from sensor units present on the vehicle test bench.

[0048] The roller assembly comprises (a) a support; (b) a roller set arranged on the support with parallel rollers that form a horizontal wheel mount, with a lifting sleeper movable in the direction of the vertical axis being arranged in a clear space between two of the rollers, and the lifting sleeper having a floating plate on its upper side. In this way, the respective wheel can be securely positioned on the roller set and thus the vehicle can be securely positioned on the vehicle test bench. When the rollers rotate, the roller assembly can rotate about the vertical axis, and the respective wheel can be securely positioned on the roller assembly.

[0049] According to a favorable embodiment of the method, the lifting beam can be lowered for the wheel turn measurement and the roller set can be set in a rotating motion. The wheel rests on the rollers and no longer has contact with the lifting beam. A wheel turn measurement, during which the wheel's alignment can be recorded, is usually carried out at low speeds. Speeds of no more than 5 km / h are advantageous, preferably no more than 2 km / h, and particularly preferably in the range of 1-2 km / h. Depending on the vehicle and the desired accuracy, the speed can also be higher. At higher speeds, the accuracy requirements can usually be lower than at lower speeds.

[0050] According to a favorable embodiment of the method, at least one wheel of the vehicle can be positioned on the roller set for chassis adjustment and rests on the floating plate of the raised lifting sleeper. The floating plate's rotational and translational mobility advantageously allows the wheel axle to be stress-free when the wheels are resting on the floating plate.

[0051] The floating plate can advantageously be arranged on an inner edge of the track roller assembly. This allows, for example, the vehicle's wheels to be positioned on an edge of the track roller assembly, giving a worker easier access to tie rods and the like on the inside of the wheel. According to a favorable embodiment of the method, the vehicle's wheel can be positioned on the roller set and the lifting sleeper lowered for a roller test. In the lowered state, the lifting sleeper can be positioned and fixed in a defined position in the direction of the transverse axis. Advantageously, the roller test can be carried out without being interfered by the lifting sleeper, since the wheel(s) are only in contact with the track rollers when the lifting sleeper is lowered.

[0052] According to a favorable embodiment of the method, the vehicle can be positioned in an extended position with its wheel on the roller set, and the lifting threshold can be raised in the extended position. This allows the vehicle to be easily removed longitudinally from the roller set despite the relatively large distances between the rollers with the lifting threshold arranged between them.

[0053] According to a further aspect of the invention, a computer program product is proposed, comprising instructions which cause a vehicle test bench according to the invention with at least one track roller assembly according to the invention to carry out the steps of the method according to the invention.

[0054] In particular, the following steps are performed. With the vehicle in a retracted position, a lifting beam of the roller assembly is raised between two rollers of a roller set of the roller assembly in the direction of a vertical axis, and a vehicle wheel is positioned on the roller set. On the vehicle test bench, to optionally perform a turnaround measurement, the lifting beam is lowered relative to the vertical axis, and the roller set is rotated by a drive unit, with the wheel being placed on the roller set. Simultaneously with the turnaround measurement, the vehicle can also be positioned by rotating the roller assembly around the vertical axis.

[0055] On the vehicle test bench, one wheel of the vehicle is positioned on the roller set for optional chassis adjustment and rests on the floating plate of the raised lifting threshold.

[0056] On the vehicle test bench, the lifting threshold is lowered for optional roller testing and the rollers are set in rotation by a drive unit, whereby the roller set is rotated around the vertical axis if necessary.

[0057] In an extended position of the vehicle, the vehicle is positioned with its wheel on the roller set and with the lifting threshold raised.

[0058] The wheel's position on the roller set can be centered or off-centered during the various steps of the process. Optionally, the wheel can be positioned centrally or off-centered as required during the various steps of the process. For this purpose, the roller assembly can be shifted accordingly along the transverse axis.

[0059] Advantageously, a control and / or regulating unit of the vehicle test bench is configured to execute the computer-implemented method. In particular, the control and / or regulating unit can have a computer-readable storage medium containing commands that, when executed by a computer of the control and / or regulating unit, cause the computer to execute the steps of the method. The vehicle test bench comprises at least one roller assembly arranged in a track for accommodating a vehicle, as well as a control and / or regulating unit for controlling components and / or for detecting sensor signals from sensor units present on the vehicle test bench.

[0060] The roller assembly comprises (a) a support; (b) a roller set arranged on the support with rollers arranged parallel to one another, which form a horizontal wheel receptacle, wherein a lifting sleeper movable in the direction of the vertical axis is arranged in a clear space between two of the rollers and the lifting sleeper has a floating plate on its upper side.

[0061] The vehicle can be automatically moved into or out of the vehicle test bench and lateral movements of the vehicle can be compensated by rotating the roller set around the vertical axis.

[0062] Alternatively, the vehicle can be moved in or out manually by pushing the vehicle or moving it with its drive.

[0063] Furthermore, a computer program is proposed, comprising instructions which cause a vehicle test bench according to the invention with at least one track roller assembly according to the invention to carry out the steps of the method according to the invention.

[0064] Furthermore, a computer-readable medium on which the computer program is stored is proposed. Advantageously, a vehicle test bench can be retrofitted with roller assemblies according to the invention. The computer program product, the computer program, and the computer-readable medium allow an existing control and / or regulation unit to be adapted to the vehicle test bench retrofitted in this way.

[0065] drawing

[0066] Further advantages will become apparent from the following description of the drawings. The figures illustrate exemplary embodiments of the invention. The figures, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0067] Examples include:

[0068] Fig. 1 shows a vehicle test bench for a vehicle according to an embodiment of the invention, in which four roller assemblies are present;

[0069] Fig. 2 shows a roller assembly with lifting sleeper in detail according to an embodiment of the invention;

[0070] Fig. 3 is a detailed view of the lifting sleeper of the roller assembly according to Figure 2 with positioning device of the lifting sleeper for a lowered state of the lifting sleeper;

[0071] Fig. 4 is a cutaway view of the detailed view from Figure 3;

[0072] Fig. 5 is a plan view of a detail of the lifting sleeper from Figure 2 with the floating plate removed;

[0073] Fig. 6 is a side view of a lifting sleeper with a concave floating plate according to an embodiment of the invention; Fig. 7 is a roller assembly according to an embodiment of the invention with a vehicle indicated;

[0074] Fig. 8 is a view of a vehicle on a roller assembly according to an embodiment of the invention with central positioning;

[0075] Fig. 9 is a view of a vehicle on a track roller assembly according to an embodiment of the invention with lateral positioning, with the track roller assembly shifted in the direction of the transverse axis;

[0076] Fig. 10 is a representation of a vehicle in the entry position with one wheel on the lifting threshold;

[0077] Fig. 11 is a view of a vehicle with one wheel in position for a turnaround measurement with the lifting threshold lowered;

[0078] Fig. 12 is a view of a vehicle with a wheel in position for chassis adjustment with the wheel on a floating plate of the raised lifting sleeper;

[0079] Fig. 13 is a representation of a vehicle with one wheel in the central position for a roller measurement with a lowered lifting threshold;

[0080] Fig. 14 is a view of a vehicle in the extended position with one wheel on the raised lifting threshold;

[0081] Fig. 15 shows an arrangement of a drive unit of a roller set according to an embodiment of the invention, in which the drive unit rotates about the vertical axis when the roller set is steered;

[0082] Fig. 16 is another view of the arrangement of the drive unit according to Fig. 15;

[0083] Fig. 17 shows an arrangement of a drive unit of a roller set according to an embodiment of the invention, in which the drive unit is stationary when the roller set is steered about the vertical axis and is connected to the roller set via a cardan shaft; Fig. 18 shows another view of the arrangement of the drive unit according to Fig. 17;

[0084] Fig. 19 shows an arrangement of a drive unit of a roller set according to an embodiment of the invention, in which the drive unit rotates about the vertical axis when the roller set is steered;

[0085] Fig. 20 shows an arrangement of a drive unit of a roller set according to an embodiment of the invention, in which the drive unit is stationary when the roller set is steered about the vertical axis and is connected to the roller set via a cardan shaft;

[0086] Fig. 21 shows a partially sectioned view of a rotating device with a rotating plate according to an embodiment of the invention with a spindle lifting cylinder;

[0087] Fig. 22 is an isometric view of the rotary plate according to Figure 21;

[0088] Fig. 23 shows a partially sectioned view of a rotating device with a rotating plate according to an embodiment of the invention with a rotation via a pair of toothed pinions and internal teeth of the rotating plate.

[0089] Embodiments of the invention

[0090] In the figures, similar or similarly functioning components are numbered with the same reference numerals. The figures show only examples and are not to be understood as limiting. Before the invention is described in detail, it should be pointed out that it is not limited to the respective components of the device or the respective method steps, since these components and methods can vary. The terms used here are intended only to describe particular embodiments and are not used in a limiting manner. Furthermore, when the singular or indefinite article is used in the description or in the claims, this also refers to the plural of these elements, unless the overall context clearly indicates otherwise.

[0091] The directional terminology used below, including terms such as "left," "right," "top," "bottom," "before," "behind," "after," and the like, is intended solely to enhance understanding of the figures and is in no way intended to limit the scope of the invention. The components and elements depicted, as well as their design and use, may vary according to the considerations of a person skilled in the art and may be adapted to specific applications.

[0092] To explain the invention, Figure 1 shows a vehicle test bench 1000 for a vehicle 200 according to an embodiment of the invention, in which four roller assemblies 100 are present, on which wheels 202 of the front axle and wheels 204 of the rear axle of the vehicle are placed.

[0093] The vehicle test bench 1000 as well as the respective track roller assembly 100 have a vertical axis Z, a transverse axis Y, and a longitudinal axis X. The vehicle test bench 1000 has a base frame 1010, on which two of the four track roller assemblies 100 are arranged in a track 1020, which in this example has two parallel sides 1022, 1024, between which there is a free space in which a worker can access a chassis of the vehicle 200. In particular, this provides access to the inside of the wheels 202, 204, near which the vehicle usually has tie rods, which are thus more easily accessible for adjusting the chassis.

[0094] An adjustment device 1030 is provided in the roadway 1020 for adjusting the distance between the roller assemblies 100 to the wheelbase of the vehicle 200. For example, the two roller assemblies 100 assigned to the rear axle can be moved in the direction of the longitudinal axis X in the vehicle test bench in order to set the correct distance between the roller assemblies 100 under the front axle and the rear axle in accordance with the actual wheelbase of the vehicle 200. The device 1030 for adjusting the distance can be telescopically inserted into or withdrawn from the respective side 1022, 1024 of the roadway 1020. For this purpose, elements are provided in front of and behind the respective roller assemblies 100, which can be inserted into or removed from the respective side of the roadway 1020.

[0095] Furthermore, devices (not shown) are provided with which corresponding measurements can be taken on the vehicle 200. The devices are connected to a control and / or regulating unit in which measured values ​​can be recorded and processed. Likewise, the control and / or regulating unit can control a drive unit assigned to the respective roller assembly 100 and / or a rotating device of the respective roller assembly 100. Furthermore, the control and / or regulating unit can contain a computer program containing commands with which, in particular, the existing roller assemblies 100 can behave in a specific manner.

[0096] Figure 2 shows a roller assembly 100 with a lifting sleeper 50 in detail according to an embodiment of the invention. Figures 3 to 5 show various views and details of the lifting sleeper 50. The roller assembly 100 comprises a roller set 12 with identical rollers 14, 16, in this example two, arranged with their axes of rotation parallel to one another, which can be driven by a drive unit 30. The two rollers 14, 16 are spaced from one another by a clear space 20. The clear space 20 between the rollers 14, 16 is dimensioned such that, on the one hand, a wheel of a vehicle is securely positioned on the rollers 14, 16 when the lifting sleeper 50 is lowered, and, on the other hand, a sufficient wheel contact area is present on the lifting sleeper 50 when the lifting sleeper 50 is raised. For cars, a suitable clearance 20 is at least 100 mm, in particular at least 250 mm, for trucks, for example, between 300 mm and 400 mm.The extension of the lifting threshold 50 in the direction of the longitudinal axis X is, for example, 250 mm.

[0097] In the clear space 20, between two of the rollers 14, 16, here the two rollers 14, 16, the lifting sleeper 50, which can be moved in the direction of the vertical axis Z, is arranged. The lifting sleeper 50 has a floating plate 60 on its upper side. The lifting sleeper 50 essentially fills the clear space 20, but can be moved up and down in the direction of the vertical axis Z between the two rollers 14, 16 without touching the rollers 14, 16 arranged on either side. In this exemplary embodiment, the lifting sleeper 50 has the floating plate 60 on its upper side and a rigid segment 62 next to it. Optionally, it can be provided that the upper side is formed entirely by a floating plate 60. The floating plate 60 can be arranged off-center, in particular on one side of the lifting sleeper 50, for example on the inside towards the free space between the sides 1022, 1024 of the roadway 1020, or also centrally in the lifting sleeper 50.Due to the extension of the lifting sleeper 50 in the direction of the longitudinal axis X, which is adapted to the free space 20, a wheel 202, 204 of a vehicle 200 (Figure 1) can easily rest on the lifting sleeper 50 when the latter is in its raised position, without the wheel 202, 204 touching the rollers 14, 16 on either side of the lifting sleeper 50. Thus, with the lifting sleeper 50 raised, the chassis of the vehicle 200 can be adjusted, while with the lifting sleeper 50 lowered, the respective wheel 202, 204 of the vehicle 200 rests on the rollers 14, 16 and can rotate when driven by the drive unit 30. A lifting drive 52 is used to raise or lower the lifting sleeper 50.

[0098] In this state, a reversal measurement can be carried out at low speed, in which a camber or other geometric property of the wheel 202, 204 can be detected, or a roller measurement can be carried out, in which considerably higher speeds can be applied and the wheels 202, 204 of the steered axle can be steered if necessary.

[0099] Due to the large distance between the two rollers 14, 16, the vehicle 200 can only enter or exit the roller assembly 100 when the lifting threshold 50 is in its raised position.

[0100] The roller assembly 100 further comprises a support 10 on which the roller set 12 is arranged. The roller set 12 with the lifting sleeper 50 is arranged on a rotating device 40, in particular a turntable 42, in order to rotate or pivot the roller set 12 with the lifting sleeper 50 about the vertical axis Z.

[0101] The rotating device 40 can have a spindle lifting cylinder, an internal gearing, or a toothed belt for rotating the roller set 12 with the lifting sleeper 50 about the vertical axis Z. The carrier 10 has a displacement device 110, for example a lifting cylinder or spindle drive or the like, with which the roller assembly 100 can be moved back and forth in the direction of the transverse axis Y during use. For this purpose, the carrier 10 can be arranged on a base frame 1010 (Figure 1) and move relative to it in the direction of the transverse axis Y.

[0102] Figures 3 to 5 show views of the lifting sleeper 50 of the roller assembly 100 according to Figure 2. Figure 3 shows a positioning device 80 of the lifting sleeper 50 for a lowered state of the lifting sleeper 50. Figure 4 shows a cutaway view of the detailed view from Figure 3. Figure 5 shows a plan view of a detail of the lifting sleeper 50 from Figure 2 with the floating plate 60 removed.

[0103] In this embodiment, the lifting sleeper 50 has a floating plate 60 on its upper side and a rigid segment 62 adjacent thereto, which are arranged on a receiving unit 78. The floating plate 60 is mounted in a floating manner on the receiving unit 78, for example, on four balls 64.

[0104] The floating plate 60 has convexly rounded sides in the direction of the transverse axis Y, while the rigid segment 60 has a corresponding concave indentation on its side facing the floating plate 60. Upon rotation about the vertical axis Z on the receiving unit 78, the floating plate 60 can rotate freely accordingly.

[0105] In this embodiment, the receiving unit 78 has two recesses 66, 68 into which the floating plate 60 engages with guide pins 72, 74 arranged on its underside. The guide pins 72, 74 can move within the recesses 66, 68. The respective boundaries 67, 69 of the recesses 66, 68 form a stop when the floating plate 60 rotates about the vertical axis Z.

[0106] Furthermore, the receiving unit 78 has an elongated hole 70 extending in the direction of the transverse axis Y, into which the floating plate 60 engages with a guide pin 76 arranged on its underside. The boundary 71 of the elongated hole 70 forms a stop when the floating plate 60 is displaced in the direction of the transverse axis Y. At the same time, the guide pin 76 forms an axis of rotation in the direction of the vertical axis Z for the floating plate 60, about which the floating plate 60 can rotate in any position of its guide pin 76 in the elongated hole 70. The guide pin 76 is mounted on a braking device 88 with a flat cylinder that can brake any movement of the floating plate 60.

[0107] The floating plate 60 allows a vehicle 200 (Figure 1) to stand on the lifting sleeper 50 with a relaxed wheel axle so that measurements and adjustments to the chassis of the vehicle 200 can be made.

[0108] Furthermore, a positioning device 80 is provided (Figure 3), which centers and / or fixes the lifting sleeper 50 in a lowered state at least in the direction of the transverse axis Y. The positioning device 80 has a first positioning element 82, for example, on the receptacle 78 of the lifting sleeper 50, and a second positioning element 90, for example, on a holder of the rollers 14, 16.

[0109] The first positioning element 82 has a tab 84 projecting towards the second positioning element 92, from which a guide pin 86 projects in the direction of the longitudinal axis X. In Figure 3, the pin 86 projects into the image plane and is indicated by a broken circle. The second positioning element 92 has a control surface 94 which is V-shaped. A groove 96 is arranged at the minimum of the V-shaped control surface 94. When the lifting threshold 50 is lowered, the pin 86 of the first positioning element 82 slides on the control surface 94 in the direction of the groove 96 and engages in the groove 96. This positive guidance allows the lifting threshold 50 to be easily brought into a defined position and held there during lowering.

[0110] Figure 6 shows a side view of a variant of the lifting sleeper 50 according to an embodiment of the invention, which shows a floating plate 60 with a concave indentation 61 in the surface. The concave indentation 61 extends in the direction of the longitudinal axis X and ensures easy fixation of a wheel on the floating plate 50 in the direction of the longitudinal axis X. The edges of the concave indentation 61 each represent a threshold that the wheel cannot easily overcome accidentally.

[0111] Figures 7 to 9 each show a detailed view of an individual roller assembly 100 with a wheel 202 of a vehicle 200 arranged thereon. Figure 7 shows an isometric view with the wheel 202 in an exemplary central position on the roller set 12 with the lifting sleeper 50 lowered. In this position, the wheel is in contact with the roller set 12 and can be indirectly driven by a drive unit 300, which drives the roller set 12. Figure 8 shows this position as a rear view. Figure 9 shows a rear view in which the roller assembly 100 is shifted outwards in the direction of the transverse axis Y. This is achieved by the shifting device 110. As a result, the wheel 202 is positioned on the inner edge of the roller set 12 and can stand on the floating plate 60 (Figures 2, 3). If both wheels 202 of an axle are positioned on the respective floating plate 60, this is relaxed so that an adjustment of the chassis, for example the tie rod, is possible.By positioning on the inner edge of the roller set 12 and correspondingly the track roller assembly 100, easier access to the tie rods close to the inside of the wheels is created, for example for a worker.

[0112] Figures 10 to 14 show, as a side view, the position in the direction of the vertical axis Z of a wheel 202 of a vehicle (not shown in detail) on the roller set 12 of a roller assembly (not shown in detail).

[0113] Figure 10 shows a representation of a retraction position with a wheel 202 on the lifting sleeper 50, which is arranged in the clear space 20 between the rollers 14, 16. In the retraction position, the lifting sleeper 50 is in a raised position so that the wheel 202 can easily remain between the rollers 14, 16 on the lifting sleeper 50 during retraction. The lifting sleeper 50 is raised in the direction of the vertical axis Z such that it does not protrude beyond the roller set 12. The roller set 12 and thus the roller assembly are located, for example, in a central position with respect to the transverse axis Y. In this representation, this axis is oriented perpendicular to the image plane. In the central position, the wheel 202 can stand on a rigid segment 62 (Figures 2, 3) of the lifting sleeper 50 if the floating plate 60 is arranged off-center.

[0114] Figure 11 shows a wheel 202 in position for a turnaround measurement with the lifting beam 50 lowered. The wheel 202 sits on both rollers 14, 16 and can be driven by them. For turnaround measurements, low speeds are advantageous, which can advantageously be in the range of 1-2 km / h.

[0115] Figure 12 shows a representation with a wheel 202 in position for a chassis adjustment. The wheel 202 is placed on a floating plate 60 (Figures 2, 3) of the raised lifting sleeper 50. The lifting sleeper 50 is raised so far that the wheel 202 is no longer in contact with the rollers 14, 16, but rests completely on the lifting sleeper 50. To allow the wheel 202 to rest on the floating plate 60 and not on the rigid segment 62 (Figures 3, 4), the roller assembly (not shown) is offset accordingly in the direction of the transverse axis Y, as described in Figure 9, which is oriented perpendicular to the image plane in the illustration.

[0116] Figure 13 shows a representation with a wheel 202, for example, in a central position on the roller set 12 for a roller measurement with a lowered lifting threshold 50. The wheel 202 sits on the two rollers 14, 16 and can be driven by them. Higher speeds, for example, 80-90 km / h or more, are advantageous for roller measurements.

[0117] Figure 14 shows an illustration of an extended position with a wheel 202 on the raised lifting sleeper 50. The wheel 202 sits on the rigid segment 62 (Figures 3, 4) of the lifting sleeper 50 and can easily extend over one of the rollers 14, 16 in the direction of the longitudinal axis X.

[0118] Figures 15 to 18 show various arrangements of a drive unit 30 of the roller set 12 with respect to a rotating device 40 of a roller assembly not shown in detail.

[0119] Advantageously, the chassis stand function is integrated into the lifting sleeper 50. The floating plate 60, which is integrated into the lifting sleeper 50, represents a smaller floating plate 60 compared to the prior art. Adjustment and measurement of chassis properties are carried out in the raised state on the floating plate 60 or lifting sleeper 50.

[0120] Figures 15 and 16 show different views of an arrangement of the drive unit 30, in which the drive unit 30 rotates with the roller set 12 when the roller set 12 is steered about the vertical axis Z when the rotating device 40, for example a rotating plate 42, rotates about the vertical axis Z. The drive unit 30 drives a gear 32 via a belt, for example a V-belt or a toothed belt, which in turn drives the two rollers 1, 16 via another belt, for example a V-belt or a toothed belt, which connects the two rollers 14, 16 and the gear 32.

[0121] This can advantageously represent a scaled roller test bench, where speeds of the roller set 12 of, for example, 90 km / h are provided. The rotation about the vertical axis Z serves to steer the roller set 12, with the drive unit 30 rotating along with it, as it is mounted in the rotatable area of ​​the arrangement.

[0122] Figures 17 and 18 show different views of an arrangement of a drive unit 30 of a roller set 12 according to an embodiment of the invention, in which the drive unit 30 is stationary when the roller set 12 is steered about the vertical axis Z and is connected to the roller set 12 via a cardan shaft 34. The cardan shaft 34 allows compensation of the rotation of the roller set 12 about the vertical axis Z relative to the drive 30. The cardan shaft 34 has a gear 36, 38 on each of its end faces. One gear 36 is connected to the drive unit 30 via a belt. The other gear 38 drives both rollers 14, 16 via a belt that runs around both end-face gears of the rollers 14, 16. The belt can be designed, for example, as a V-belt or a toothed belt.

[0123] This can advantageously represent a scaled roller test bench in which speeds of the roller set 12 of, for example, 90 km / h are provided. The rotation about the vertical axis Z serves to steer the roller set 12, whereby the drive unit 30 does not rotate. The cardan shaft 34 can compensate for the relative movement. The output is stationary. Figure 19 shows an arrangement of a drive unit 30 of a roller set 12 in which the drive unit 30 rotates about the vertical axis Z when the roller set 12 is steered. In this case, only one of the rollers 14, 16 is driven. The drive unit 30 drives the front-end gear of one of the driven rollers 1 or 16. The other of the rollers 16 or 14 is driven during operation by the vehicle wheel (not shown) placed on it.

[0124] This can advantageously represent a scaled roller test bench, where speeds of the roller set 12 of, for example, 90 km / h are provided. The rotation about the vertical axis Z serves to steer the roller set 12, with the drive unit 30 rotating along with it. The drive unit 30 is mounted in the rotatable area of ​​the arrangement.

[0125] Figure 20 shows an arrangement of a drive unit 30 of a roller set 12, in which the drive unit 30 is stationary when the roller set 12 is steered about the vertical axis Z and is connected to the roller set 12 via a cardan shaft 34. The drive unit 30 drives a front-end gear 36 of the cardan shaft 34 via a belt, for example with a V-belt or toothed belt. The cardan shaft 34, in turn, is directly connected to one of the rollers 14 or 16, in particular to a shaft of this roller 14 or 16. The other roller 16 or 14 is driven via a belt which connects the two rollers 14, 16. The belt can be designed, for example, as a V-belt or toothed belt.

[0126] Figures 21 to 23 show various embodiments of the rotating device 40. Figure 21 shows a partially sectioned view of a rotating device 40 with a rotating plate 42 according to an embodiment of the invention. Figure 22 shows an isometric view of the rotating plate 42 according to Figure 21. Rotation is effected via a spindle lifting cylinder 44. If the spindle lifting cylinder 44 is deflected, this is converted into a rotation of the rotating plate 42.

[0127] Figure 23 shows a partially sectioned view of a rotating device 40 with a rotating plate 42 according to an embodiment of the invention. The rotating plate 42 has an internal toothing 46. A driven pinion 48 can engage the internal toothing 46 and cause the rotating plate 42 to rotate.

[0128] A method according to the invention for operating a vehicle test bench 1000 for testing a vehicle 200 with at least one roller assembly 100 provides, in a retracted position of the vehicle 200, for positioning the vehicle 200 with its wheels 202, 204 centrally on the roller set 12 with the lifting threshold 50 raised.

[0129] To carry out a turnover measurement, the method provides for positioning the vehicle 200 with its wheel 202, 204, for example, centrally or off-center on the roller set 12, lowering the lifting threshold 50 and setting the roller set 12 in a rotary movement.

[0130] For a chassis adjustment, the method provides for moving the track roller assembly 100 in the direction of the transverse axis Y such that at least one wheel 202, 204 of the vehicle 200 is positioned off-center on the roller set 12 and rests on the floating plate 6 of the raised lifting sleeper 50. The off-center positioning of the wheel 202, 204 makes the respective tie rod on the inside of the wheel easier to access. For a roller test, the method provides for moving the track roller assembly 100 in the direction of the transverse axis Y such that the wheel 202, 204 of the vehicle 200 is positioned centrally on the respective roller set 12, wherein the lifting sleeper 50 is lowered for the roller test.

[0131] For an extended position, the method provides for the roller assembly 100 to be displaced in the direction of the transverse axis Y such that the vehicle 200 is positioned in the extended position with its wheel 202, 204 centrally on the respective roller set 12, wherein the lifting threshold 50 is raised in the extended position.

[0132] The central or off-center position of the wheel 202, 204 can be freely selected as required.

[0133] Reference symbol

[0134] 10 carriers

[0135] 12 roller sets

[0136] 14 rolls

[0137] 16 rolls

[0138] 20 free space

[0139] 30 drive unit

[0140] 32 gear

[0141] 34 Cardan shaft

[0142] 36 gear

[0143] 38 gear

[0144] 40 Rotating device

[0145] 42 turntables

[0146] 44 spindle lifting cylinders

[0147] 46 internal gearing

[0148] 48 pinions

[0149] 50 lifting threshold

[0150] 52 Lifting drive lifting threshold

[0151] 60 floating plate

[0152] 61 Deepening

[0153] 62 rigid segment

[0154] 64 balls

[0155] 66 recess

[0156] 68 recess

[0157] 70 slot

[0158] 72 guide pins

[0159] 74 guide pins

[0160] 76 guide pins

[0161] 78 Recording unit

[0162] 80 Positioning device

[0163] 82 Positioning element

[0164] 84 tab

[0165] 86 Pin 2 Positioning element 4 Control surface 6 Groove

[0166] 100 roller unit

[0167] 110 Shifting device carrier 00 Vehicle 02 Wheel

[0168] 204 wheels

[0169] 1000 vehicle test bench

[0170] 1010 base frame

[0171] 1020 roadway

[0172] 1022 pages

[0173] 1024 pages

[0174] 1030 Adjustment device

Claims

Claims 1. A roller assembly (100) for a vehicle test bench (1000), having a vertical axis (Z), a transverse axis (Y) and a longitudinal axis (X), comprising - a carrier (10); - a roller set (12) arranged on the support (10) with rollers (14, 16) arranged parallel to one another, which form a horizontal wheel receptacle, wherein in a clear space (20) between two of the rollers (1, 16) a lifting sleeper (50) movable in the direction of the vertical axis (Z) is arranged and the lifting sleeper (50) has a floating plate (60) on its upper side.

2. Roller assembly according to claim 1, wherein a positioning device (80) is provided which guides the lifting sleeper (50) in a lowered state at least in the direction of the transverse axis (Y) into a basic position and / or fixes it in a basic position.

3. Roller assembly according to claim 1 or 2, wherein the roller set (12) and the lifting sleeper (50) with the floating plate (60) are mounted together on a rotating device (40).

4. Roller assembly according to one of the preceding claims, wherein the lifting sleeper (50) has a receiving unit (78) on which the floating plate (60) is mounted in a floating manner, in particular wherein the floating plate (60) forms at least part of a surface of the lifting sleeper (50).

5. Roller assembly according to claim 4, wherein the receiving unit (78) of the lifting sleeper (50) has at least one recess (66, 68) into which the floating plate (60) engages with at least one guide pin (72, 74), in particular wherein a boundary (67, 69) of the at least one recess (66, 68) forms a stop during rotation of the floating plate (60) about the vertical axis (Z).

6. Roller assembly according to one of claims 4 to 5, wherein the receiving unit (78) has at least one elongated hole (70) extending in the direction of the transverse axis (Y), into which the floating plate (60) engages with a guide pin (76), in particular wherein a boundary (71) of the elongated hole (70) forms a stop during a displacement of the floating plate (60) in the direction of the transverse axis (Y).

7. Roller assembly according to one of the preceding claims, wherein the floating plate (60) has at least one stop for fixing a wheel (202, 204) in the direction of the longitudinal axis (X) on the floating plate (60), in particular wherein the floating plate (60) has an indentation (61).

8. Roller assembly according to one of claims 3 to 7, wherein the rotating device (40) for rotating the roller set (12) and lifting sleeper (50) about the vertical axis (Z) has a spindle lifting cylinder, or wherein the rotating device (40) for rotating the roller set (12) and lifting sleeper (50) about the vertical axis (Z) has a toothing, or wherein the rotating device (40) for rotating the roller set (12) and lifting sleeper (50) about the vertical axis (Z) has a toothed belt.

9. Roller assembly according to one of the preceding claims, wherein a displacement device (110) is provided with which the carrier (10) with the roller set (12) and the lifting sleeper (50) can be displaced in the direction of the transverse axis (Y).

10. Roller assembly according to one of the preceding claims, wherein the clear space (20) between the rollers (14, 16) is at least 100 mm, in particular at least 250 mm. 11 . Roller assembly according to one of the preceding claims, wherein the extension of the lifting sleeper (50) along the longitudinal axis (X) is at least 90 mm, in particular at least 100 mm.

12. Roller assembly according to one of the preceding claims, wherein a drive unit (30) for driving the roller set (12) is arranged stationary to the roller set (12), and / or wherein a drive unit (30) for driving the roller set (12) is arranged stationary to the carrier (10), in particular is connected to the roller set (12) by a coupling (32), and / or wherein at least one of the rollers (14, 16) has a roller motor.

13. Vehicle test bench (1000) with at least one roller assembly (100) according to one of the preceding claims, which is arranged in a roadway (1020) for receiving a vehicle (200), with a control and / or regulating unit for controlling components and / or for detecting sensor signals from sensor units present on the vehicle test bench (1000).

14. Vehicle test bench according to claim 13, wherein at least one device is provided for directly or indirectly detecting a rolling behavior and / or a static or dynamic braking behavior of the vehicle (200).

15. Vehicle test bench according to claim 13 or 14, wherein at least one device is provided for directly or indirectly detecting a toe and camber angle, track width and / or for directly or indirectly detecting a chassis geometry and / or chassis parameters of the vehicle (200) and / or a vehicle geometry.

16. Vehicle test bench according to one of claims 12 to 14, wherein an adjusting device (1030) is provided for adapting a distance of the roller assemblies (100) to a wheelbase of a vehicle (200).

17. A method for operating a vehicle test bench (1000) according to one of claims 13 to 16 for testing and / or adjusting a vehicle (200) with at least one roller assembly (100) according to one of claims 1 to 12, wherein the roller assembly (100) comprises a carrier (10) and a roller set (12) arranged on the carrier (10), with rollers (14, 16) arranged parallel to one another, which form a horizontal wheel receptacle, and wherein a lifting sleeper (50) movable in the direction of a vertical axis (Z) is arranged in a clear space (20) between two of the rollers (14, 16), and the lifting sleeper (50) has a floating plate (60) on its upper side, wherein the vehicle (200) in a retracted position with at least one wheel (202, 204) of at least one of its axles between the rollers (14, 16) on the roller set (12) is positioned above the lifting threshold (50).

18. The method according to claim 17, wherein, in order to carry out a turnover measurement, the lifting threshold (50) is lowered and the roller set (12) is set in a rotary movement.

19. Method according to claim 17 or 18, wherein for a chassis adjustment at least one wheel (202, 204) of the vehicle (200) is positioned on the roller set (12) and stands on the floating plate (60) of the raised lifting sleeper (50).

20. Method according to one of claims 17 to 19, wherein for a roller test the wheel (202, 204) of the vehicle (200) is positioned on the roller set (12) and the lifting threshold (50) is lowered for the roller test.

21. Method according to one of claims 17 to 20, wherein the vehicle (200) is positioned in an extended position with its wheel (202, 204) on the roller set (12) and in the extended position the lifting threshold (50) is raised.

22. A computer program product comprising instructions causing a vehicle test bench (1000) according to one of claims 13 to 16 having at least one roller assembly (100) according to one of claims 1 to 12 to carry out the steps of the method according to one of claims 17 to 21, in particular wherein, in a retracted position of the vehicle (200), a lifting threshold (50) of the roller assembly (100) is raised between two rollers (14, 16) of a roller set (12) of the roller assembly (100) in the direction of a vertical axis (Z) and a wheel (202, 204) of the vehicle (200) is arranged on the roller set (12) with respect to the transverse axis (Y);wherein on the vehicle test bench (1000) for optionally carrying out a turnover measurement, the lifting threshold (50) is lowered relative to the vertical axis (Z) and the roller set (12) is set into a rotary movement by a drive unit (30) and the wheel (202, 204) is placed on the roller set (12) and, if necessary, the roller set (12) is rotated about the vertical axis (Z); wherein, on the vehicle test bench (1000), a wheel (202, 204) of the vehicle (200) is positioned on the roller set (12) for optional chassis adjustment and rests on the floating plate (60) of the raised lifting sleeper (50); wherein, on the vehicle test bench (1000), the lifting sleeper (50) is lowered for optional roller testing and the rollers (14, 16) are set in rotation by a drive unit (30) and, if necessary, the roller set (12) is rotated about the vertical axis (Z); wherein, in an extended position of the vehicle (200), the vehicle (200) is positioned with its wheel (202, 204) on the roller set (12) and with the lifting sleeper (50) raised.

23. Computer program comprising instructions which cause a vehicle test bench (1000) according to one of claims 13 to 16 with at least one roller assembly (100) according to one of claims 1 to 12 to carry out the steps of the method according to one of claims 17 to 21.

24. A computer-readable medium on which the computer program according to claim 23 is stored.

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