Wheel dynamic impact simulation experiment machine

Abstract

The invention discloses a wheel dynamic impact simulation experiment machine, relates to the field of vehicle detection equipment, and aims to solve the problems that existing wheel track simulation equipment is simple in road condition simulation, cannot truly reproduce complex conditions of a road and affects the vehicle track detection accuracy. A weight box is slidably connected into the protection frame, a lifting table is arranged above the weight box, a traction rope is installed between the lifting table and the weight box, two sets of symmetrically-distributed supporting frames are fixedly connected to the lower portion of the weight box, and installation bases are fixedly connected to the two sets of supporting frames. A test wheel is rotatably connected between the two groups of mounting seats, a simulation roller is matched below the test wheel, the simulation roller is rotatably connected with an adjusting table, and the adjusting table is slidably connected with the detection table, and the test device has the advantages that the complex geometrical characteristics of a real road can be accurately reproduced through the simulation roller, and the authenticity of a test environment is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle testing equipment technology, and in particular to a wheel dynamic impact simulation test machine. Background Technology

[0002] Currently, the industry commonly uses rotary drum or single-roller test benches for bench testing of tires (including run-flat tires). Their standard working principle is as follows: a motor drives one or more large rollers to rotate at a constant speed. The roller surfaces directly contact the wheels of the vehicle being tested, generating friction and thus causing the wheels to rotate. This model simplifies the vehicle's driving state to uniform linear motion on an absolutely level, flat, rigid road surface.

[0003] This traditional equipment has the following significant limitations: First, the existing equipment oversimplifies the road conditions: it can only simulate the smooth rolling conditions on ideal paved roads, and cannot reproduce the complex mechanical environment in the real world, such as potholes, bumps, gravel, shoulder impact, lateral force when cornering, and longitudinal slippage during emergency braking.

[0004] Secondly, it is impossible to effectively assess the core performance of run-flat tires: The key design feature of run-flat tires is that they can still be safely driven a certain distance at a certain speed after a significant drop or complete loss of tire pressure. Traditional drum test benches cannot simulate the instantaneous impact process that leads to a tire blowout or puncture (such as running over a sharp obstacle) to test the durability limit of their sidewall support structure under continuous load, bending, and heat generation.

[0005] Finally, the data obtained from existing equipment testing is limited in scope: it mainly acquires data such as durability, wear, and uniformity under uniform rolling conditions, but lacks the ability to collect key parameters such as the tire's structural response, ground imprint changes, and temperature field distribution under multi-dimensional dynamic loads (vertical impact, longitudinal slip, and lateral torsion). These parameters are the core of evaluating the safety performance of run-flat tires.

[0006] Therefore, existing technologies lack a specialized device that can actively apply controllable, multi-dimensional road surface excitations to tires to simulate real, harsh driving trajectories, thereby quantitatively testing the run-flat tire's run-flat characteristics, run-flat range, and structural integrity under extreme conditions. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, this invention provides a wheel dynamic impact simulation test machine. This design effectively solves the problem that existing wheel trajectory simulation equipment can only simulate simple road conditions and cannot truly reproduce the complex road conditions, thus affecting the accuracy of vehicle trajectory detection.

[0008] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a testing platform, a protective frame fixedly connected to the testing platform, a counterweight box slidably connected inside the protective frame, a hanging platform above the counterweight box, a traction rope installed between the hanging platform and the counterweight box, two sets of symmetrically distributed support frames fixedly connected below the counterweight box, mounting seats fixedly connected to each of the two sets of support frames, a test wheel rotatably connected between the two sets of mounting seats, a simulated roller cooperating below the test wheel, an adjustment platform rotatably connected to the simulated roller, and the adjustment platform slidably connected to the testing platform; The simulated roller includes a undulating cylindrical surface and a flat cylindrical surface. A roadblock block is fixedly connected to the undulating cylindrical surface, and a pit is provided on the flat cylindrical surface. An adjusting pad is slidably connected in the pit, and the adjusting pad fits into the pit.

[0009] Preferably, the lifting platform includes a top plate, which is fixedly connected to the protective frame. A fixed pulley is provided below the top plate, and the traction rope is located above the fixed pulley. A winch is fixedly connected to the traction end of the traction rope, and the winch is rotatably connected to the protective frame.

[0010] Preferably, a movable pulley is rotatably connected to the counterweight box, the traction rope passes around the movable pulley, and the fixed end of the traction rope is fixedly connected to the top plate.

[0011] Preferably, a guide rod is fixedly connected to the counterweight box, the guide rod is slidably connected to the lifting platform, a limit plate is fixedly connected to the upper end of the guide rod, and a storage bin is provided on the counterweight box.

[0012] Preferably, the support frame includes a first support rod, which is fixedly connected to the counterweight box. A second support rod is slidably connected inside the first support rod. The second support rod is fixed to the mounting base by bolts. A shock absorber is installed between the first support rod and the second support rod.

[0013] Preferably, the shock absorber is threaded with an adjusting nut, the first support rod is provided with a limiting hole, the second support rod is provided with a positioning hole, and a pin is fitted into the limiting hole and the positioning hole.

[0014] Preferably, a drive shaft is fixedly connected inside the simulated roller, and the drive shaft is rotatably connected to the adjustment platform. One end of the simulated roller is provided with a first inner cavity, and the first inner cavity is provided with a mounting hole. A locking bolt is fitted in the mounting hole and is fixedly connected to the roadblock block. The other end of the simulated roller is provided with a second inner cavity, and an adjustment slide is slidably connected in the second inner cavity. The adjustment slide is fixedly connected to the adjustment pad block.

[0015] Preferably, a load-bearing rod is fixedly connected to both the first inner cavity and the second inner cavity.

[0016] Preferably, the adjusting slide includes a sleeve that is slidably connected to the simulated roller. Limiting nuts are provided on both sides of the sleeve and are threadedly connected to the simulated roller. Connecting rods are hinged around the sleeve, and a slider is hinged to the other end of each connecting rod. The slider is slidably connected to a guide plate, which is fixedly connected to the simulated roller. The guide plate has a groove for the slider to slide in, and a guide rod is fixedly connected between the slider and the adjusting pad.

[0017] Preferably, the testing platform is provided with a slide rail, the adjusting platform is slidably connected to the slide rail, an adjusting screw is threadedly connected to the lower part of the adjusting platform, the adjusting screw is rotatably connected to the testing platform, a reinforcing bolt is provided on the side of the adjusting platform, and a fixing hole that mates with the reinforcing bolt is provided on the testing platform.

[0018] Compared with the prior art, the outstanding advantages of this invention are: This application simulates the undulating cylindrical surface of a roller in conjunction with obstacle blocks to excite undulating road surfaces. The flat cylindrical surface combined with adjusting pads supports the dynamic adjustment of obstacles, which can actively and accurately simulate the real three-dimensional motion trajectory and force state of the wheel on a rough road surface, thus eliminating the need for a single uniform rolling test mode.

[0019] This application simulates the real three-dimensional motion trajectory and stress state of a tire on a harsh road surface, and can simultaneously collect multi-dimensional mechanical data, temperature field data and deformation data of the tire under complex dynamic loads, providing unprecedented rich data support for the design optimization, safety evaluation and standard setting of run-flat tires.

[0020] This application uses a laterally moving simulated roller to easily and quickly switch between various test scenarios, such as standard road surfaces and harsh road surfaces. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the overall main structure of the present invention.

[0023] Figure 3 This is a schematic cross-sectional view of the protective frame structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the axial connection structure of the counterweight box of the present invention.

[0025] Figure 5 This is a schematic diagram of the support frame structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the main structure of the lifting platform of the present invention.

[0027] Figure 7 This is a schematic diagram of the connection structure of the detection station of the present invention.

[0028] Figure 8 This is a schematic diagram of the adjustment platform structure of the present invention.

[0029] Figure 9 This is a schematic diagram of the front cross-sectional structure of the simulated roller of the present invention.

[0030] Figure 10 This is a schematic diagram of the simulated roller shaft side structure of the present invention.

[0031] Figure 11 This is a schematic diagram of the adjustable carriage shaft side structure of the present invention.

[0032] Figure 12 This is a schematic diagram of the left-side structure of the adjustable carriage of the present invention.

[0033] Numbered in the diagram: 1. Testing platform; 2. Protective frame; 3. Counterweight box; 4. Lifting platform; 401. Top plate; 402. Fixed pulley; 403. Winch; 404. Moving pulley; 5. Traction rope; 6. Support frame; 601. First support rod; 602. Second support rod; 603. Shock absorber; 604. Adjusting nut; 605. Limiting hole; 606. Positioning hole; 7. Mounting base; 8. Test roller; 9. Simulated roller; 901. Wavering cylindrical surface; 902. Flat cylindrical surface; 903. Obstacle block; 904. Pit 905. Groove; 10. Adjusting pad; 11. Adjusting platform; 12. Guide rod; 13. Limiting plate; 14. Storage bin; 15. Drive shaft; 16. First inner cavity; 17. Locking bolt; 18. Second inner cavity; 19. Adjusting slide; 10. Sleeve; 11. Limiting nut; 12. Connecting rod; 13. Sliding block; 14. Sliding block; 15. Guide plate; 16. Slide groove; 17. Guide rod; 18. Load-bearing rod; 19. Slide rail; 20. Adjusting screw; 21. Reinforcing bolt; 22. Fixing hole. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] Please see the appendix Figure 1-12This embodiment describes a wheel dynamic impact simulation test machine, which includes a test platform 1, a protective frame 2 fixedly connected to the test platform 1, a counterweight box 3 slidably connected inside the protective frame 2, a hanging platform 4 above the counterweight box 3, a traction rope 5 installed between the hanging platform 4 and the counterweight box 3, two sets of symmetrically distributed support frames 6 fixedly connected below the counterweight box 3, mounting seats 7 fixedly connected to each of the two sets of support frames 6, a test wheel rotatably connected between the two sets of mounting seats 7, a simulated roller 9 fitted below the test wheel, an adjustment platform 10 rotatably connected to the simulated roller 9, and the adjustment platform 10 slidably connected to the test platform 1.

[0036] The overall structure of this wheel trajectory simulation device consists of a testing platform 1, a protective frame 2, a counterweight box 3, a hanging platform 4, a traction rope 5, a support frame 6, a mounting base 7, a test wheel, a simulation roller 9, and an adjustment platform 10. The testing platform 1 serves as the basic support platform, with the protective frame 2 fixedly connected to it, forming a stable frame structure to constrain the overall displacement of the equipment during operation, thereby ensuring the accuracy of subsequent road excitation simulation. The counterweight box 3 is installed inside the protective frame 2 via a sliding connection. The vertical freedom of movement of the counterweight box 3 allows it to dynamically respond to changes in the road surface during testing. The hanging platform 4 above the counterweight box 3 is connected to the counterweight box 3 via a traction rope 5, which controls the lifting and lowering of the entire counterweight box 3. Two sets of symmetrically distributed support frames 6 fixedly connected below the counterweight box 3 ensure even force distribution on the test wheel, avoiding uneven loading. The mounting base 7 fixedly connected to the upper end of the support frame 6 provides a rotation fulcrum for the test wheel, allowing it to rotate freely to reproduce the actual driving state. The simulated roller 9, which is fitted under the test wheel, is the core simulation component. It is rotatably connected to the adjustment platform 10. The adjustment platform 10 and the test platform 1 are slidably connected to achieve position adjustment. The structure of the simulated roller 9 includes a undulating cylindrical surface 901 and a flat cylindrical surface 902. The road obstacle block 903 is fixedly connected on the undulating cylindrical surface 901 to generate road protrusions or obstacle features. An adjusting pad 905 is slidably connected in the pothole 904 set on the flat cylindrical surface 902. The fitting relationship between the adjusting pad 905 and the pothole 904 allows it to move along the direction of the pothole 904, thereby forming an adjustable depth concave structure to simulate road surface geometric features such as potholes or joints. At the same time, when the adjusting pad 905 is at the upper limit position, the adjusting pad 905 just fills the pothole 904, so that there is no concavity on the flat cylindrical surface 902.

[0037] The undulating cylindrical surface 901 and the flat cylindrical surface 902 divide the cylindrical surface of the simulated roller 9 into left and right parts, realizing the dynamic reproduction of complex road surface contours. When the test wheel rolls on the surface of the simulated roller 9, the obstacle block 903 in the left half directly acts on the wheel to generate high-frequency vibration and impact load, while the adjustment pad 905 in the right half adjusts its position in the pothole 904 to generate concave areas of different shapes, thereby covering diverse working conditions from urban speed bumps to off-road roads. Furthermore, in a specific embodiment, the undulating cylindrical surface 901 of the simulated roller 9 can be provided with obstacle blocks 903 with a height of 20 mm. The dynamic load applied by the counterweight box 3 through the traction rope 5 works in conjunction with the surface features of the simulated roller 9, so that the test wheel can truly reflect the load fluctuation and movement trajectory when the vehicle passes through undulating and uneven road surfaces during operation, effectively avoiding the limitation of traditional equipment that can only simulate an ideal plane.

[0038] This technical solution, by integrating a dynamic load system with an innovative simulated roller 9 structure, solves the problem that traditional wheel trajectory simulation equipment cannot reproduce the complex geometric features of real road surfaces, such as undulations, bumps, seams, and potholes. The resulting impacts, vibrations, and high-frequency loads can be accurately transmitted to the test wheel, providing an environment close to actual working conditions for tire durability, suspension system, and braking performance testing. As a preferred implementation, the sliding engagement mechanism between the adjusting pad 905 and the groove 1806 allows the equipment to flexibly generate road surface defect features of different depths, thus comprehensively covering the simulation needs of complex road surface excitations. Simultaneously, the symmetrically distributed support frame 6 design ensures stability during testing, avoiding test deviations caused by structural offsets. Therefore, this equipment not only overcomes the limitation of single test conditions but also expands its application scope in vehicle research and development and quality inspection, enabling wheel trajectory testing to truly reflect the dynamic response characteristics in actual road environments.

[0039] The suspended platform 4 includes a top plate 401, which is fixedly connected to the protective frame 2. A fixed pulley 402 is located below the top plate 401, and a traction rope 5 is positioned above the fixed pulley 402. A winch 403 is fixedly connected to the traction end of the traction rope 5, and the winch 403 is rotatably connected to the protective frame 2. The top plate 401 refers to the main support structure of the suspended platform 4, which can be welded from metal plates or profiles to provide rigid support and prevent fluctuations in traction force caused by foundation swaying when the counterweight box 3 moves. The fixed pulley 402... This refers to a fixedly installed pulley element, which can be a metal pulley with bearings or a multi-pulley block configuration, used to precisely constrain the path of the traction rope 5, disperse lateral forces, and reduce frictional resistance; the traction rope 5 refers to a flexible cable connecting the counterweight box 3 and the winch 403, which can be a steel wire rope or a high-strength synthetic fiber rope to withstand dynamic load changes; the winch 403 refers to a device that provides active traction power, which can be an electric winch 403 or a hydraulic winch 403 to achieve precise control of traction force.

[0040] Specifically, the solution of this application establishes a rigid benchmark through the fixed connection between the top plate 401 and the protective frame 2, ensuring the stability of the main body of the platform 4 and providing a reliable installation foundation for the traction system; the setting of the fixed pulley 402 precisely constrains the path of the traction rope 5, preventing slippage or deviation during movement and ensuring the consistency of the traction direction; the arrangement of the traction rope 5 above the fixed pulley 402 forms a stable envelope contact, maintaining the precise trajectory of the vertical movement of the counterweight box 3; the rotational connection between the winch 403 and the protective frame 2 allows for slight swaying to adapt to changes in the traction angle, eliminating stress concentration caused by the rigid connection; at the same time, the winch 403, as a programmable power source, dynamically adjusts the winding and unwinding speed, so that the motion response of the counterweight box 3 conforms to the dynamic characteristics of the real road surface excitation, thereby achieving overall stability of traction force transmission and accurate simulation of complex road conditions.

[0041] A movable pulley 404 is rotatably connected to the counterweight box 3. The traction rope 5 passes over the fixed pulley 402, and the fixed end of the traction rope 5 is fixedly connected to the top plate 401. The movable pulley 404 is a pulley device that can rotate freely around an axis. It can be implemented using a metal pulley with bearing support. The purpose is to reduce the frictional resistance of the traction rope 5 during movement. Figure 6 As shown, there are traction ropes 5 on both sides of the movable pulley 404, which can reduce the stress on the traction rope 5 on one side.

[0042] Specifically, the solution of this application uses a movable pulley 404 rotatably connected to the counterweight box 3, which allows the movable pulley 404 to rotate freely with the vertical movement of the counterweight box 3, thereby adapting to the angle change of the traction rope 5 during the pulling process and avoiding direct friction between the rope and the counterweight box 3. The design of the traction rope 5 bypassing the fixed pulley 402 fixes the movement path of the rope, preventing lateral deviation during the pulling process and reducing sliding friction and energy loss. The fixed end of the traction rope 5 is fixedly connected to the top plate 401, and together with the movable pulley 404 and the fixed pulley 402, it forms a pulley system. When the winch 403 retracts or releases the traction rope 5, the displacement of the counterweight box 3 and the change in the length of the traction rope 5 maintain a precise ratio, effectively eliminating the problem of rope slack or uneven tension, thereby ensuring the accurate reproduction of the test wheel's running trajectory on the simulated roller 9.

[0043] The guide rod 1807 above the counterweight box 3 is a guide element used to constrain the movement trajectory of the counterweight box 3. It can be implemented using a cylindrical rod or a square tube structure, with the purpose of providing a reference path for vertical movement. The connection method of the guide rod 1807, which moves vertically relative to the platform 4 but restricts horizontal displacement, can be implemented using a linear bearing or a sliding sleeve structure, with the purpose of ensuring the stability of the movement trajectory of the counterweight box 3. In practical applications, the limiting piece 12 is a blocking component that prevents the guide rod 1807 from dislodging from the platform 4. For example, it can be a disc-shaped metal piece, with the purpose of ensuring the safety of the equipment at extreme positions. Specifically, the storage bin 13 is a container used to hold the counterweight material. It can be designed as a detachable hopper or a fixed bin, with the purpose of simplifying the load adjustment process.

[0044] By fixing the guide rod 1807 to the counterweight box 3 and forming a sliding engagement with the lifting platform 4, the movement of the counterweight box 3 is strictly limited to the vertical direction. The limiting plate 12 at the upper end of the guide rod 1807 provides physical obstruction when the counterweight box 3 rises to its limit position. At the same time, the storage bin 13 on the counterweight box 3 allows for dynamic adjustment of the load during testing. This design ensures that the counterweight box 3 does not sway laterally during traction, thereby stably transmitting impact loads and accurately simulating complex road surface excitations.

[0045] The support frame 6 includes a first support rod 601, which is fixedly connected to the counterweight box 3. A second support rod 602 is slidably connected inside the first support rod 601. The second support rod 602 is fixed to the mounting base 7 by bolts. A shock absorber 603 is installed between the first support rod 601 and the second support rod 602. The first support rod 601 is the fixed reference part of the support frame 6, which can be made of rigid metal tubing or high-strength alloy profiles. Its purpose is to ensure a stable connection with the counterweight box 3 and to serve as a fixed support for the shock absorption system. The second support rod 602 is a component that can move relative to the first support rod 601 in a vertical direction. It can be made of cylindrical rods or rectangular cross-section rods that fit precisely with the inner cavity of the first support rod 601. Its purpose is to allow the test wheel to generate buffer displacement when encountering road undulations. The shock absorber 603 is a vibration energy dissipation device. It can be made of helical springs, hydraulic dampers, or rubber elastomers. Its purpose is to absorb and attenuate the high-frequency vibrations generated by road impacts and prevent energy from being directly transmitted to the counterweight box 3.

[0046] The shock absorber 603 is threadedly connected to an adjusting nut 604. The first support rod 601 has a limiting hole 605, and the second support rod 602 has a positioning hole 606. Pins are fitted into the limiting hole 605 and the positioning hole 606. The adjusting nut 604 is a threaded connection component used to adjust the pre-compression of the shock absorber 603. It can be a hexagonal nut or a wing nut, and its purpose is to dynamically change the initial working state of the shock absorber 603 through rotation. The limiting hole 605 is a positioning hole provided on the first support rod 601. The hole, which can be circular, elliptical, or oblong, is intended to provide a clear reference point to identify the adjustment position of the support frame 6; the positioning hole 606 refers to the hole on the second support rod 602 that corresponds to the limiting hole 605, which can be circular or irregularly shaped, and is intended to cooperate with the limiting hole 605 to achieve precise positioning; the pin is an insertable locking element, which can be implemented by a cylindrical pin, a cotter pin, or a resilient pin, and is intended to eliminate the relative sliding between the first support rod 601 and the second support rod 602 through a rigid connection.

[0047] By providing an adjusting nut 604 with a threaded connection on the shock absorber 603, the operator can rotate the adjusting nut 604 to change the pre-compression of the shock absorber 603 according to the test requirements, thereby adjusting its damping characteristics. In addition, by providing a limiting hole 605 and a positioning hole 606 on the first support rod 601 and the second support rod 602 respectively, and inserting a pin when aligned, the support frame 6 is rigidly locked in its telescopic position to prevent displacement caused by vibration during dynamic testing.

[0048] A drive shaft 14 is fixedly connected inside the simulated roller 9, and the drive shaft 14 is rotatably connected to the adjustment table. One end of the simulated roller 9 has a first inner cavity 15, and the first inner cavity 15 has a mounting hole. A locking bolt 16 fits into the mounting hole and is fixedly connected to the roadblock block 903. The other end of the simulated roller 9 has a second inner cavity 17, and an adjusting slide 18 is slidably connected inside the second inner cavity 17. The adjusting slide 18 is fixedly connected to the adjusting pad block 905. The first inner cavity 15 refers to the cavity set inside the simulated roller 9, which can be implemented by a cylindrical cavity. The purpose of this is to facilitate the installation and replacement of the roadblock block 903, avoiding the risk of loosening caused by external connections; the second inner cavity 17 refers to the cavity set at the other end of the simulated roller 9 for supporting the adjustment mechanism, the purpose of which is to provide a stable environment for the controlled movement of the adjustment pad 905; the adjustment slide 18 refers to the support structure used to support and guide the displacement of the adjustment pad 905, which can be implemented by a rigid metal support or a composite material support, the purpose of which is to ensure that the adjustment pad 905 can reliably lock its position after movement, preventing displacement caused by vibration during the test.

[0049] Specifically, the drive shaft 14 is fixedly connected inside the simulated roller 9 and rotatably connected to the adjustment platform, providing basic support for the rotational power transmission of the roller and ensuring that the roller remains stable during operation; the first inner cavity 15 is located at one end of the simulated roller 9, and the mounting holes on it are fastened to the roadblock block 903 in the cavity by locking bolts 16, so that the roadblock block 903 is not easy to shift when subjected to wheel impact load, and at the same time, it is convenient to disassemble and replace the roadblock block 903 in the future; the second inner cavity 17 is located at the other end of the simulated roller 9, and the adjusting slide 18 slidably connected inside is fixed to the adjusting pad 905. When the adjusting pad 905 moves in the slide groove 1806, the adjusting slide 18 moves synchronously and locks, thereby accurately maintaining the height of the flat cylindrical surface 902.

[0050] Both the first inner cavity 15 and the second inner cavity 17 are fixedly connected to load-bearing rods 19. Load-bearing rods 19 are rigid support components used to strengthen the overall rigidity of the inner cavity structure. They can be made of solid metal rods, hollow steel pipes or composite material rods. Their purpose is to increase the bending strength of the inner cavity, effectively disperse dynamic impact loads, and avoid plastic deformation of the inner cavity wall due to stress concentration.

[0051] The adjusting slide 18 includes a sleeve 1801, which is slidably connected to the simulated roller 9. Limiting nuts 1802 are provided on both sides of the sleeve 1801, and the limiting nuts 1802 are threadedly connected to the simulated roller 9. Connecting rods 1803 are hinged around the sleeve 1801, and a slider 1804 is hinged to the other end of each connecting rod 1803. A guide plate 1805 is slidably connected to the slider 1804, and the guide plate 1805 is fixedly connected to the simulated roller 9. The guide plate 1805 has a groove 1806 for the slider 1804 to slide on. A guide rod 1807 is fixedly connected between the slider 1804 and the adjusting pad 905. The sleeve 1801 is a hollow tubular guiding component, which can be made of seamless steel or aluminum alloy tubing, and its purpose is to provide a guiding foundation for axial sliding and to withstand radial loads. The limiting nuts 1802 are adjustable fasteners, which can be implemented using a nut structure with a locking function, and their purpose is to... The sleeve 1801 is finely adjusted and locked through threaded engagement; the connecting rod 1803 is a hinged connecting rod, which can be made of high-strength alloy steel, and its purpose is to transmit motion and allow angle changes to accommodate displacement; the slider 1804 is a linear motion actuator, which can be made of wear-resistant alloy material, and its purpose is to slide precisely along a fixed trajectory; the guide plate 1805 is a trajectory constraint plate, which can be made of cast iron or steel disc structure, and its purpose is to provide a stable motion guide surface for the slider 1804; the groove 1806 is a constraint groove opened on the guide plate 1805, which can be designed as a straight or arc groove, and its purpose is to limit the motion path of the slider 1804 and prevent radial deviation; the guide rod 1807 is a displacement transmission rod, which can be rigidly connected, and its purpose is to ensure the motion synchronization between the slider 1804 and the adjusting pad 905.

[0052] Specifically, the solution of this application establishes an axial displacement basis through the sliding connection between the sleeve 1801 and the simulated roller 9, while the sleeve 1801 is locked in position by the threaded connection between the limit nut 1802 and the simulated roller 9. When the sleeve 1801 moves axially, the connecting rod 1803 hinged around the sleeve 1801 automatically adjusts its angle according to the displacement, driving the slider 1804 to make a pure linear motion in the groove 1806 of the guide plate 1805. The geometry of the groove 1806 strictly constrains the movement trajectory of the slider 1804, eliminating radial wobble and compensating for assembly errors. The slider 1804 directly transmits the displacement to the adjusting pad 905 through the guide rod 1807, ensuring that the movement of the adjusting pad 905 is completely synchronous and without energy loss, thereby maintaining the precise position of the adjusting pad 905 during the dynamic operation of the equipment and achieving stable adjustment of the surface contour of the simulated roller 9.

[0053] The testing table 1 is equipped with a slide rail 20, which is a rigid guide structure set on the surface of the testing table 1. It can be implemented in the form of a T-slot or an I-beam cross-section guide rail, and its purpose is to provide a strictly defined linear motion trajectory for the adjustment table 10. The adjusting screw is a transmission element with a precision thread pair, which can be implemented in the form of a trapezoidal thread or a ball screw structure, and its purpose is to convert rotational motion into controllable linear displacement. The reinforcing bolt 22 is a fastener with a quick-locking function, which can be implemented in the form of a hexagonal head bolt with a spring washer or an internal hexagonal bolt, and its purpose is to apply radial locking force to resist dynamic loads. The fixing hole 23 is a standardized positioning hole 606 series pre-set on the testing table 1, which can be implemented in the form of a cylindrical through hole or a countersunk hole structure, and its purpose is to provide a rigid engagement point that matches the reinforcing bolt 22.

[0054] Specifically, the slide rail 20 applies geometric constraints to the adjustment platform 10, ensuring that it can only slide smoothly along a single axis and avoiding lateral displacement during movement. The rotational connection between the adjusting screw and the detection platform 1 forms a stable rotational fulcrum. When the adjusting screw is rotated, its threaded joint precisely converts the rotational motion into the linear displacement of the adjustment platform 10, achieving micron-level position adjustment. During the target position locking stage, the reinforcing bolt 22 passes through the side of the adjustment platform 10 and is embedded in the fixing hole 23. Through the threaded fastening mechanism, a rigid connection is established between the adjustment platform 10 and the detection platform 1, effectively suppressing the vibration transmission caused by wheel impact during testing. The above components together constitute a complete positioning-adjustment-locking technology chain. The slide rail 20 ensures the accuracy of the motion trajectory, the adjusting screw provides the precision of displacement control, and the cooperation between the reinforcing bolt 22 and the fixing hole 23 ensures the absolute stability of the final position. The three form a progressive technical guarantee system.

[0055] The adjustment platform 10 strictly follows the preset straight trajectory during movement to avoid deviation caused by external force interference. At the same time, it can be fixed without gaps at two extreme positions, completely eliminating the risk of position drift during the test. This ensures the long-term stability of the simulated roller 9 position, effectively improves the accuracy of wheel running trajectory simulation, and meets the strict requirements for the reliability of test data under complex road conditions.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wheel dynamic impact simulation test machine, characterized in that: The test includes a test platform (1), a protective frame (2) fixedly connected to the test platform (1), a counterweight box (3) slidably connected inside the protective frame (2), a hanging platform (4) above the counterweight box (3), a traction rope (5) installed between the hanging platform (4) and the counterweight box (3), two sets of symmetrically distributed support frames (6) fixedly connected below the counterweight box (3), mounting seats (7) fixedly connected to both sets of support frames (6), test wheels rotatably connected between the two sets of mounting seats (7), a simulated roller (9) fitted below the test wheels, an adjustment platform (10) rotatably connected to the simulated roller (9), and the adjustment platform (10) slidably connected to the test platform (1). The simulated roller (9) includes a undulating cylindrical surface (901) and a flat cylindrical surface (902). A roadblock block (903) is fixedly connected to the undulating cylindrical surface (901), and a pit (904) is provided on the flat cylindrical surface (902). An adjusting pad (905) is slidably connected in the pit (904), and the adjusting pad (905) fits into the pit (904).

2. The wheel dynamic impact simulation test machine according to claim 1, characterized in that: The hoisting platform (4) includes a top plate (401), which is fixedly connected to the protective frame (2). A fixed pulley (402) is provided below the top plate (401), and the traction rope (5) is located above the fixed pulley (402). A winch (403) is fixedly connected to the traction end of the traction rope (5), and the winch (403) is rotatably connected to the protective frame (2).

3. The wheel dynamic impact simulation test machine according to claim 2, characterized in that: The counterweight box (3) is rotatably connected to a movable pulley (404), the traction rope (5) passes around the movable pulley (404), and the fixed end of the traction rope (5) is fixedly connected to the top plate (401).

4. The wheel dynamic impact simulation test machine according to claim 1, characterized in that: A guide rod (1807) is fixedly connected to the counterweight box (3). The guide rod (1807) is slidably connected to the lifting platform (4). A limit plate (12) is fixedly connected to the upper end of the guide rod (1807). A storage bin (13) is provided on the counterweight box (3).

5. A wheel dynamic impact simulation test machine according to claim 1 or 4, characterized in that: The support frame (6) includes a first support rod (601), which is fixedly connected to the counterweight box (3). A second support rod (602) is slidably connected inside the first support rod (601). The second support rod (602) is fixed to the mounting base (7) by bolts. A shock absorber (603) is installed between the first support rod (601) and the second support rod (602).

6. The wheel dynamic impact simulation test machine according to claim 5, characterized in that: The shock absorber (603) is threaded with an adjusting nut (604), the first support rod (601) is provided with a limiting hole (605), the second support rod (602) is provided with a positioning hole (606), and a pin is fitted in the limiting hole (605) and the positioning hole (606).

7. The wheel dynamic impact simulation test machine according to claim 1, characterized in that: A drive shaft (14) is fixedly connected inside the simulated roller (9). The drive shaft (14) is rotatably connected to the adjustment platform. One end of the simulated roller (9) is provided with a first inner cavity (15). The first inner cavity (15) is provided with an installation hole. A locking bolt (16) is fitted in the installation hole. The locking bolt (16) is fixedly connected to the roadblock block (903). The other end of the simulated roller (9) is provided with a second inner cavity (17). An adjustment slide (18) is connected inside the second inner cavity (17). The adjustment slide (18) is fixedly connected to the adjustment pad block (905).

8. A wheel dynamic impact simulation test machine according to claim 7, characterized in that: A load-bearing rod (19) is fixedly connected to both the first inner cavity (15) and the second inner cavity (17).

9. A wheel dynamic impact simulation test machine according to claim 7, characterized in that: The adjusting slide (18) includes a sleeve (1801), which is slidably connected to the simulated roller (9). Limiting nuts (1802) are provided on both sides of the sleeve (1801), and the limiting nuts (1802) are threadedly connected to the simulated roller (9). Connecting rods (1803) are hinged around the sleeve (1801), and a slider (1804) is hinged to the other end of the connecting rod (1803). The slider (1804) is slidably connected to a guide plate (1805), and the guide plate (1805) is fixedly connected to the simulated roller (9). The guide plate (1805) is provided with a groove (1806) for the slider (1804) to slide. A guide rod (1807) is fixedly connected between the slider (1804) and the adjusting pad (905).

10. A wheel dynamic impact simulation test machine according to claim 1, characterized in that: The testing platform (1) is provided with a slide rail (20), the adjustment platform (10) is slidably connected to the slide rail (20), the adjustment platform (10) is threadedly connected to the bottom of the adjustment platform (10), the adjustment screw (21) is rotatably connected to the testing platform (1), the adjustment platform (10) is provided with a reinforcing bolt (22) on its side, and the testing platform (1) is provided with a fixing hole (23) that cooperates with the reinforcing bolt (22).

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