CN219830317U

CN219830317U - Racing car suspension testing device and test bed

Info

Publication number: CN219830317U
Application number: CN202320337139.XU
Authority: CN
Inventors: 郭福山; 陈运星
Original assignee: Hubei University of Arts and Science
Current assignee: Xiangyang Weibida Automotive Technology Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-10-13
Anticipated expiration: 2033-02-27

Abstract

The utility model discloses a racing suspension testing device and a testing stand, wherein the racing suspension testing device comprises a base, a frame simulation support, two driving devices and two pressure sensors; the frame simulation support is used for simulating a suspension beam of a racing car, the frame simulation support is movably arranged on the base, two ends of the frame simulation support, which are oppositely arranged in the left-right direction, are respectively provided with a mounting upright post, and each mounting upright post is used for mounting a tire to be tested; the two driving devices are respectively and correspondingly arranged at the lower ends of the two mounting upright posts and are used for driving the tire to be tested to jump; the two pressure sensors are respectively and correspondingly arranged between the driving devices and the tires to be tested and are used for detecting the pressure born by the tires to be tested. The utility model aims to provide the racing car suspension testing device which is simple in structure, convenient to operate, reliable in testing data and low in price.

Description

Racing car suspension testing device and test bed

Technical Field

The utility model relates to the technical field of tire testing, in particular to a racing suspension testing device and a testing stand.

Background

The FSAE racing car cross arm is generally 4130 steel or carbon fiber, and the safety factor of the partial structure of the racing car is generally set smaller for pursuing extremely light weight. In addition, the racing rules require that the tire jump be formed to a minimum of 50MM, otherwise the vehicle will not pass the test and will not be able to participate in the dynamic event. The racing agents require that only the motorcade can design and process related parts by himself, so that the actual construction strength of the machined or purchased parts of the motorcade is smaller than the design strength, and the construction reliability, impact strength and the like are greatly reduced; for example, in the aspect of welding, the local structure cannot meet the designed rigidity and strength requirements due to the problem of a welding seam at a certain place, so that unsafe actions such as running out of control and the like occur in the racing car. It is necessary to test the run-out and feedback of the overall structure of the suspension after the race is finished to confirm the safety of the race.

Most of motorcades select to use an experience method or a car body pressing method for testing the feedback condition of a racing car suspension, but the two methods are difficult to obviously test the dynamic condition of a formula racing car suspension system, the rigidity of an actual structure cannot be calculated, the rebound condition of the suspension can only be checked simply through the change of the ground clearance of the car body, meanwhile, the actual working condition of the suspension under the cooperation of an anti-tilting rod when the racing car runs on a racing field cannot be simulated, and therefore, under the condition of simulating durable racing for a long time, a plurality of motorcades can run due to the fact that a certain part (most parts are purchased or autonomously designed or processed by the motorcades) of the suspension system cannot run, normal driving practice is affected, and life safety of a driver is affected. For a fleet with higher budget expense, a test bed test method is generally adopted, and although the method can more accurately test the feedback condition of the racing suspension, the test bed used by the test bed test method is generally more than 100 ten thousand, and the general fleet is difficult to have the test conditions.

Disclosure of Invention

The utility model mainly aims to provide a racing car suspension testing device and a testing stand, and aims to provide the racing car suspension testing device which is simple in structure, convenient to operate, reliable in testing data and low in price.

In order to achieve the above object, the present utility model provides a racing suspension testing device for simulating and detecting a racing tire runout, the racing suspension testing device comprising:

a base;

the vehicle frame simulation support is used for simulating a suspension beam of a racing vehicle, the vehicle frame simulation support is movably arranged on the base, two ends of the vehicle frame simulation support, which are oppositely arranged in the left-right direction, are respectively provided with a mounting upright post, and each mounting upright post is used for mounting a tire to be tested;

the two driving devices are respectively and correspondingly arranged at the lower ends of the two mounting upright posts and are used for driving the tire to be tested to jump; the method comprises the steps of,

the two pressure sensors are respectively and correspondingly arranged between the driving devices and the tires to be tested and are used for detecting the pressure born by the tires to be tested.

Optionally, the racing suspension testing device further comprises an anti-tilting device, wherein the anti-tilting device is fixedly installed on the frame simulation support and is respectively connected to the two installation upright posts.

Optionally, the anti-tilting device comprises:

the support plate is fixed on the base;

the first supporting rod is arranged in an extending mode along the front-back direction and is movably arranged on the supporting plate along the left-right direction;

two second supporting rods extend along the left-right direction, one ends of the two second supporting rods are respectively connected to two ends of the first supporting rod along the front-back direction, and the other ends of the two second supporting rods are respectively provided with a rocker arm; the method comprises the steps of,

and one end of each third rod is respectively connected with the corresponding rocker arm, and the other end of each third rod is connected with the mounting upright post.

Optionally, a via hole is formed in the middle of the first supporting rod, a rotating shaft corresponding to the via hole is formed in the supporting plate, and the rotating shaft is matched with the via hole, so that the first supporting rod moves in the left-right direction.

Optionally, the anti-tilting device further includes two damping springs, the two damping springs are separately provided at two sides of the first support rod, which are oppositely arranged along the left-right direction, the two damping springs extend along the left-right direction, one end of each damping spring is connected to the rotating shaft, and the other end is connected to the corresponding rocker arm.

Optionally, the base is provided with two end parts which are oppositely arranged along the left-right direction, and two threaded rods are arranged on the two end parts at intervals;

the frame simulation support comprises two rocker arm assemblies, and the two rocker arm assemblies are correspondingly connected to the two threaded rods.

Optionally, each group of rocker arm assemblies comprises two rocker arm mechanisms arranged along the up-down direction, each rocker arm mechanism comprises two fixed claws and two connecting rods, the two fixed claws are correspondingly connected with the two threaded rods, one ends of the two connecting rods are connected with the corresponding fixed claws, and the other ends of the two connecting rods are respectively connected to the mounting upright posts.

Optionally, each fixing claw includes two revolute pairs hinged to each other, wherein a threaded hole is formed on one end of one revolute pair away from the hinged position for being matched with the threaded rod, and one end of the other revolute pair away from the junction is used for being connected with the connecting rod.

Optionally, each of the driving means comprises a jack.

In addition, the utility model also provides a test bed, which comprises the racing car suspension testing device; the racing suspension testing device comprises:

a base;

According to the technical scheme, the front or rear suspension assembly of the racing car can be dynamically tested on a relatively economical universal test platform, dynamic data of the racing car under the limit condition that safety factors are considered when the racing car runs are applied to each tire, and the response condition of the frame simulation support, the rigidity of the cross arm, fatigue durability, impact strength, reliability, smoothness and other data are observed and calculated, so that the safety of the racing car is judged; specifically, the frame simulation support is used for simulating a front or rear suspension assembly of a racing car, so that the suspension beam of the racing car is prevented from being detached and installed on a test bench, the state of the frame simulation support is adjusted to be the same as that of a suspension Liang Zhuangtai of the racing car to be tested, then two tires of the racing car are installed on the installation upright, force is applied to the tires on the installation upright through two driving devices, the jumping of the tires in the driving process of the racing car is simulated, meanwhile, a pressure sensor is arranged between the installation upright and the driving devices and used for sensing the upper pressure exerted on the tires, and the jumping condition of the racing car is obtained by detecting the driving force exerted on the tires, so that the safety of the racing car is determined.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a racing suspension testing apparatus according to the present utility model;

FIG. 2 is a front view of the racing suspension testing apparatus of FIG. 1;

FIG. 3 is a top view of the racing suspension testing apparatus of FIG. 1;

fig. 4 is a side view of the racing suspension testing apparatus of fig. 1.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Racing car suspension testing device	4	Driving device
1	Base seat	41	Jack (Jack)
				11	Threaded rod	5	Tilting prevention device
2	Frame simulation support	51	Supporting plate
				21	Rocker arm assembly	511	Rotating shaft
22	Rocker arm mechanism	52	First strut
				221	Fixing claw	521	Via hole
222	Connecting rod	53	Second strut
				223	Revolute pair	54	Third strut
3	Mounting upright post	55	Damping spring

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In view of the above, the utility model provides a racing suspension testing device, which enables a front or rear suspension assembly of a racing car to be dynamically tested on a relatively economical universal testing platform, applies dynamic data of the racing car under the limit condition of considering safety coefficient when the racing car runs to each wheel, and tests the tire of the racing car, so that the data is reliable and the cost is lower; fig. 1 to 4 are schematic views of an embodiment of a racing suspension testing device according to the present utility model, which is mainly described below with reference to the specific drawings.

Referring to fig. 1, the present utility model provides a racing suspension testing device 100 for simulating and detecting a racing tire jump, where the racing suspension testing device 100 includes a base 1, a frame simulating bracket 2, two driving devices 4 and two pressure sensors; the frame simulation support 2 is used for simulating a suspension beam of a racing car, the frame simulation support 2 is movably arranged on the base 1, two ends of the frame simulation support 2, which are oppositely arranged in the left-right direction, are respectively provided with a mounting upright post 3, and each mounting upright post 3 is used for mounting a tire to be tested; the two driving devices 4 are respectively and correspondingly arranged at the lower ends of the two mounting upright posts 3 and are used for driving the tires to be tested to jump; the two pressure sensors are respectively and correspondingly arranged between the driving devices 4 and the tires to be tested and are used for detecting the pressure born by the tires to be tested.

In the technical scheme of the utility model, the racing car suspension testing device 100 enables the front or rear suspension assembly of a racing car to be dynamically tested on a relatively economical universal testing platform, applies dynamic data under the limit condition that safety coefficient is considered when the racing car runs to each tire, observes and calculates the response condition of the frame simulation support 2 and the data of the cross arm rigidity, fatigue durability, impact strength, reliability, smoothness and the like, so as to judge the safety of the racing car; specifically, the frame simulation support 2 is used for simulating a front or rear suspension assembly of a racing car, so that the suspension beam of the racing car is prevented from being detached from a test bench, the state of the frame simulation support 2 is adjusted to be identical to that of a suspension Liang Zhuangtai of the racing car to be tested, then two tires of the racing car are mounted on the mounting upright 3, force is applied to the tires on the mounting upright 3 through the two driving devices 4, the jumping of the tires in the driving process of the racing car is simulated, meanwhile, a pressure sensor is arranged between the mounting upright 3 and the driving devices 4 and is used for sensing the driving force exerted by the tires, the jumping condition of the racing car is obtained by detecting the upward pressure exerted by the tires, and therefore the safety of the racing car is determined.

It should be noted that, the specific types of the two driving devices 4 are not limited, so long as the two driving devices can drive the tire to simulate the jumping situation of the tire, specifically, in this embodiment, each driving device 4 includes a jack 41, the jack 41 is used to provide linear displacement variation for the wheel core of the tire to simulate the wheel jumping situation when the racing car dynamically moves, and meanwhile, the pressure sensor is used to monitor the magnitude of the force acting on the tire in real time, so as to obtain the jumping force of the tire through the magnitude variation of the force, and the states of the two jacks 41, such as pressure relief and pressurization cooperation, are adjusted to simulate the real-time working situation of the racing car turning condition and the braking condition, so as to obtain more real test results.

Further, during the actual movement of the racing car, the racing car may incline during the running due to various reasons such as the terrain and climate, so that during the actual evaluation, the anti-incline performance of the racing car needs to be evaluated, particularly referring to fig. 2, 3 and 4, in this embodiment, the racing car suspension testing device 100 further includes an anti-incline device 5, where the anti-incline device 5 is fixedly mounted on the frame simulation support 2 and is respectively connected to two of the mounting posts 3. Specifically, the anti-tilting device 5 is disposed above the frame simulation support 2, in order to simulate the movement of a racing car in the actual testing process, in this implementation, the two jacks 41 are subjected to pressure relief and pressurization, so that the two mounting posts 3 (i.e. tires) are subjected to different driving forces, when the two mounting posts 3 are subjected to different driving forces, the two sides will tilt due to the tilting caused by uneven stress, at this time, the anti-tilting device 5 acts, balances the driving forces on the two sides, avoids tilting, further, in order to facilitate description, the two mounting posts 3 are defined as a first mounting post and a second mounting post, the two jacks 41 are a first jack and a second jack, in the testing process, initially, the driving forces of the first jack and the second jack are consistent, the numerical values of the two pressure sensors are recorded, then the first jack is subjected to pressure relief treatment until the pressure of the first jack is smaller than the pressure of the second jack, the anti-tilting device is observed, the state of the two jacks is observed, and then the pressure sensor is subjected to the first pressure sensor is recorded until the numerical values of the two jacks are simultaneously, and the pressure sensor is simultaneously subjected to the pressure measurement is recorded. The performance of the suspension of the racing car can be obtained through the experiment.

Referring to fig. 2, 3 and 4, the anti-tilting device 5 includes a support plate 51, a first strut 52, two second struts 53 and two third struts 54; the support plate 51 is fixed on the base 1; the first supporting rod 52 is extended in the front-rear direction and is movably arranged on the supporting plate 51 in the left-right direction; the two second supporting rods 53 extend in the left-right direction, one ends of the two second supporting rods 53 are respectively connected to two ends of the first supporting rod 52 arranged in the front-back direction, and the other ends are respectively provided with a rocker arm; one end of each third rod is respectively connected with the corresponding rocker arm, and the other end is connected with the mounting upright 3. Specifically, in this embodiment, the middle portion of the first strut 52 is movably connected to the support plate 51, so that the first strut 52 may swing along the left-right direction, one ends of the two second struts 53 are respectively connected to two ends of the first strut 52, and the other ends are connected to the mounting post 3, when the tire is mounted on the mounting post 3, further, when the driving device 4 applies upward forces to two tires at the same time (it is required to say that the magnitudes of driving forces applied by the two driving devices 4 are not limited, in this embodiment, the magnitudes of the driving forces applied by the two driving devices 4 are different in order to simulate the jumping situation of the tire during the racing movement, the magnitudes of the applied driving forces are the forces applied by the ground to the tire during the racing acceleration), the states (i.e., the offset, the bending deformation situation, etc.) of the first strut 52, each second strut 53 and each third strut 54 are observed, then, the jumping situation is repeatedly observed, the data is obtained by repeatedly observing the states of the driving devices 4, the tire is repeatedly observed, the data is obtained by observing the situations of the first strut 4, the actual deformation situation, the step is repeatedly observed, and the tire deformation situation is repeatedly observed, the step is completed, the situation that safety of a rider is endangered due to part breakage and the like when the racing car runs is avoided.

Specifically, in this embodiment, the principle of the anti-tilting device 5 is that when the pressure of one jack 41 is smaller than that of the other jack 41, the tires on two sides are stressed differently and the tires on two sides jump differently, and at this time, the anti-tilting device 5 transfers the force on the side with high stress to the side with low stress to drive the tires on the side with low stress to jump, so that the tires on two sides jump identically, and the purpose of preventing tilting is achieved.

Further, referring to fig. 2, 3 and 4, the movement manner of the first supporting rod 52 is not limited as long as the first supporting rod 52 can rotate in the left-right direction, specifically, in this embodiment, a through hole 521 is formed in the middle of the first supporting rod 52, a rotating shaft 511 corresponding to the through hole 521 is formed on the supporting plate 51, and the rotating shaft 511 cooperates with the through hole 521 to enable the first supporting rod 52 to move in the left-right direction. The purpose of this arrangement is to ensure stability of the first support rod 52, and to avoid the first support rod 52 from being separated from the support plate 51, so that the reliability of the test results is higher.

Further, in this embodiment, the anti-tilting device 5 further includes two damping springs 55, where the two damping springs 55 are separately disposed on two sides of the first strut 52 opposite to each other in the left-right direction, the two damping springs 55 each extend in the left-right direction, one end of each damping spring 55 is connected to the rotating shaft 511, and the other end is connected to the corresponding rocker arm. The purpose of this is to simulate the anti-tilting device 5 of the racing car so that the test results are more reliable.

Referring to fig. 2, 3 and 4, the base 1 has two ends opposite to each other in the left-right direction, and two threaded rods 11 are disposed on each of the two ends at intervals; the frame simulation support 2 comprises two rocker arm assemblies 21, and the two rocker arm assemblies 21 are correspondingly connected to the two threaded rods 11. It should be noted that, since the shapes of each vehicle model are different, the sizes of each vehicle suspension are also different, in order to ensure that the racing vehicle suspension testing device 100 can test more vehicle models, the two rocker arm assemblies 21 are correspondingly and movably connected to the two threaded rods 11, and the positions of the two rocker arm assemblies 21 on the threaded rods 11 are adjusted, so that the racing vehicle suspension testing device 100 is adapted to more vehicle models.

Specifically, referring to fig. 2, 3 and 4, each rocker arm assembly 21 includes two rocker arm mechanisms 22 disposed in an up-down direction, each rocker arm mechanism 22 includes two fixing claws 221 and two connecting rods 222, the two fixing claws 221 are respectively connected to the two threaded rods 11, one ends of the two connecting rods 222 are connected to the corresponding fixing claws 221, and the other ends are connected to the mounting posts 3. In this embodiment, where the cross arm is connected to the frame, the racing suspension testing device 100 simulates the racing suspension through the fixing claw 221 and the connecting rod 222, in an actual experiment, after the fixing claw 221 and the connecting rod 222 are fixed according to the technological parameters, the frame simulating bracket 2 and the mounting upright post 3 are fixed, the anti-tilting device 5 adjusts according to the racing standards, and after the adjustment is completed, the tire is mounted on the mounting upright post 3, so that the experimental preparation can be completed.

Further, each of the fixing claws 221 includes two revolute pairs 223 hinged to each other, wherein a threaded hole is formed at an end of one of the revolute pairs 223 away from the hinge for being engaged with the threaded rod 11, and an end of the other revolute pair 223 away from the junction is connected to the connecting rod 222. In this embodiment, the two revolute pairs 223 are fixed by bolts, and the connection mode of the two revolute pairs 223 adopts threaded contact, so that under the condition that each racing car has different suspension hard point heights, the racing car suspension testing device 100 can be suitable for suspensions of different racing car designs, and simultaneously prevent the revolute pairs 223 matched with the threaded rod 11 from rotating under the limiting working condition, the real situation that the racing car is assembled is simulated at the joint of the revolute pairs 223 matched with the threaded rod 11 and the upper and lower cross arms, the bolts with the metric of 8 mm are used for fixing, the two-stage revolute pairs 223 are adopted for the fixing claws 221, the simulation range of the fixed hard points of the rocker arm assembly 21 in space is larger, and under the condition that the fixed hard points of the connecting rods 222 are different, the connection points can be compounded with the practical racing car suspension design requirements by using a slightly short connecting block.

It should be noted that, in this embodiment, the threaded rod 11 is provided, the purpose of the revolute pair 233 is to improve the applicability of the racing suspension testing device 100, so that different types of racing vehicles can be simulated and tested, and according to the size of the racing vehicles, the suspension beam of the racing vehicles can be simulated by adjusting the position of the revolute pair 233 on the threaded rod 11 and adjusting the included angle distance between the two revolute pairs 233, thereby realizing testing of the different types of racing vehicles.

Based on the racing suspension testing device 100, in the present embodiment, the stiffness of the racing cross arm can be calculated by applying a limited displacement to the jack 41 (calculated by a pressure sensor acting at the connection between the jack 41 and the cross arm and the length of the jack 41 extending out, and the specific calculation process and formula refer to the conventional means in the art); the impact strength can be calculated through the critical state of the cross arm when the cross arm is broken and through the displacement of the pressure sensor and the jack 41 (the specific calculation process and formula are referred to the conventional means in the field); the smoothness is realized by observing the condition that the tire is jumped and pressure transformed under the action of the balance bar by the suspension brackets at two sides when one end is depressurized after the pressure of the jack 41 is simultaneously applied at two ends (meanwhile, the real-time monitoring can be carried out by a camera, the low-speed playing is properly carried out at the later stage, and whether the tire is jumped and frustrated or not is observed in the depressurization process); the fatigue rigidity can be finally concluded through repeated iteration of a plurality of tests; the racing car suspension testing device 100 fills up the short plates of a motorcade with relatively high expenditure on a suspension testing platform, so that the feedback condition of a racing car suspension during dynamic state can be known more clearly and accurately under the condition of low expenditure, and meanwhile, the matching of the small-pitch upright rod, the fixed claw 221 and the revolute pair 223 enables one testing platform to be repeatedly used (under the condition that the suspension structure of the motorcade is double cross arms), so that the suspension performance of the motorcade is improved to a certain extent.

In addition, the utility model also provides a test bed which comprises the racing suspension testing device 100. The specific structure of the racing suspension testing apparatus 100 refers to the above-described embodiment. Because the test bed adopts all the technical schemes of all the embodiments, the test bed has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A racing suspension testing apparatus for use in simulating detection of a racing tire runout, the racing suspension testing apparatus comprising:

a base;

2. The racing suspension testing apparatus of claim 1, further comprising an anti-tilt device fixedly mounted to the frame simulation support and connected to each of the two mounting posts.

3. The racing suspension testing device of claim 2, wherein said anti-tilt device comprises:

the support plate is fixed on the base;

4. The racing suspension testing device according to claim 3, wherein a through hole is formed in the middle of the first strut, a rotation shaft corresponding to the through hole is formed in the support plate, and the rotation shaft is matched with the through hole, so that the first strut moves in the left-right direction.

5. The racing suspension testing apparatus according to claim 4, wherein said anti-tilting means further comprises two damper springs, said two damper springs being disposed on opposite sides of said first strut in a left-right direction, said two damper springs each extending in the left-right direction, one end of each damper spring being connected to said rotary shaft, and the other end being connected to a corresponding rocker arm.

6. The racing suspension testing device according to claim 1, wherein said base has two ends disposed opposite each other in a lateral direction, said two ends each having two threaded rods disposed thereon at a distance;

7. The racing suspension testing apparatus according to claim 6, wherein each of the rocker arm assemblies comprises two rocker arm mechanisms disposed in an up-down direction, each of the rocker arm mechanisms comprising two fixing claws and two connecting rods, the two fixing claws being connected to the two threaded rods, one ends of the two connecting rods being connected to the corresponding fixing claws, and the other ends being connected to the mounting posts.

8. The racing suspension testing apparatus according to claim 7, wherein each of said fixed claws comprises two revolute pairs hinged to each other, wherein a threaded hole is formed in one end of one of said revolute pairs remote from the hinge for engagement with said threaded rod, and one end of the other revolute pair remote from the junction is for connection with said connecting rod.

9. The racing suspension testing device of claim 1, wherein each of said drive devices comprises a jack.

10. A test stand comprising a racing suspension testing device according to any one of claims 1 to 9.