Tire modal testing device

Abstract

The utility model discloses a tire modal testing device, which comprises a vibration exciter, a support assembly and a suspension assembly, and is characterized in that the vibration exciter is used for exciting a tire; the supporting assembly comprises a frame and a supporting plate arranged at the bottom of the frame, the supporting plate is provided with a first guide rail in the first direction, and the vibration exciter is installed on the first guide rail and can move along the first guide rail; the suspension assembly is arranged in the second direction, the second direction is perpendicular to the horizontal plane where the first direction is located, and the suspension assembly is used for suspending the tire so that the tire can be arranged above the vibration exciter. According to the utility model, the vibration exciter is adopted to excite the tire, so that the detection efficiency of the modal test of the tire can be improved, the problem that the force and the accuracy are difficult to control when the tire is manually knocked is avoided, the test data deviation caused by human factors is reduced, and the accuracy of the test data is improved; the vibration exciter is installed on the first guide rail of the supporting plate and can move along the first guide rail, and the working area of the vibration exciter is enlarged so as to meet the tire modal test requirements of various working conditions.

Description

Technical Field

[0001] This utility model relates to the field of tire testing technology, and in particular to a tire modal testing device. Background Technology

[0002] Under driving conditions, road surface excitation acts on the tires, causing vibrations. After being filtered, the tires transmit this excitation through the vehicle's suspension, chassis, and steering system to the passenger compartment, ultimately forming low-frequency noise and vibration that are perceived by the driver and passengers. Therefore, in-depth research into tire modal characteristics and force transmission characteristics has become a key technical approach to solving automotive NVH (noise, vibration, and harshness) problems. Researchers can analyze the mechanical properties of tires under different operating conditions by conducting modal testing, gaining insights into key parameters such as tire mode shape, natural frequency, and damping ratio. This is crucial for tire design and optimization.

[0003] In related technologies, tire modal testing typically involves suspending the tire with a soft rope, evenly distributing measuring points on the tire surface, and then striking these points with a hammer. Finally, sensors positioned on either side of the tire rim center capture and collect test data to obtain key modal parameters such as the tire's natural frequency, damping ratio, and mode shape. However, manual tire modal testing requires experienced operators with precise control over the force and accuracy of the strikes. Furthermore, the testing process necessitates multiple people working together, judging the excitation effectiveness by real-time observation of waveforms acquired by a computer. This not only results in a cumbersome and inefficient process but also introduces human error that can lead to data deviations. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a tire modal testing device that can improve the detection efficiency of tire modal testing and enhance the accuracy of test data.

[0005] A tire modal testing device according to a first aspect of the present invention includes: a vibrator for exciting a tire; a support assembly including a frame and a support plate disposed at the bottom of the frame, the support plate having a first guide rail disposed along a first direction, the vibrator being mounted on the first guide rail and movable along the first guide rail; and a suspension assembly disposed along a second direction perpendicular to the horizontal plane containing the first direction, the suspension assembly for suspending the tire to position the tire above the vibrator.

[0006] The tire modal testing device according to the embodiments of this utility model has at least the following beneficial effects: Using a vibrator to excite the tire improves the detection efficiency of tire modal testing, avoids the problem of difficulty in controlling the force and accuracy when manually tapping the tire, reduces test data deviation caused by human factors, and improves the accuracy of test data. Furthermore, the vibrator is mounted on the first guide rail of the support plate and can move along it, expanding the working area of ​​the vibrator to adapt to the tire modal testing needs of various working conditions.

[0007] According to some embodiments of the present invention, the suspension assembly includes a mounting post, and a mounting shaft is provided on the side of the mounting post near the vibrator, the mounting shaft being used to mount the tire.

[0008] According to some embodiments of the present invention, the mounting column is provided with a second guide rail, the second guide rail is arranged along the second direction, the mounting shaft is mounted on the second guide rail, and the mounting shaft can move along the second guide rail.

[0009] According to some embodiments of the present invention, a counterweight is provided on the side of the support plate away from the mounting column, and the counterweight is used to balance the center of gravity.

[0010] According to some embodiments of the present invention, the suspension assembly further includes a plurality of suspension tubes and suspension ropes, the plurality of suspension tubes being disposed on the top of the frame, and the two ends of the plurality of suspension ropes being connected to the suspension tubes, the suspension ropes being used to suspend the tires.

[0011] According to some embodiments of this utility model, a strong magnet is provided at each end of the suspension tube, and the strong magnet is magnetically connected to the frame to limit the position of the suspension tube.

[0012] According to some embodiments of the present invention, a load-bearing support is provided at the bottom of the frame, and the load-bearing support is used to stabilize the frame.

[0013] According to some embodiments of the present invention, the frame includes four first rods arranged along the first direction, four second rods arranged along the second direction, and four third rods arranged along a third direction. The first rods, the second rods, and the third rods are connected end to end to each other, and the third direction is perpendicular to the plane containing the first direction and the second direction.

[0014] According to some embodiments of the present invention, the support assembly further includes multiple reinforcing members, the top of the second rod is connected to the first rod and the second rod to form an installation angle, and the multiple reinforcing members are respectively arranged in the corresponding installation angle.

[0015] According to some embodiments of the present invention, the frame is provided with reinforcing rods on opposite sides parallel to the first direction, one end of the reinforcing rod is connected to the first rod, and the other end of the reinforcing rod is connected to the second rod.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 These are schematic diagrams of the structure of some embodiments of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of some other embodiments of the present invention.

[0020] Figure reference numerals: 100, exciter;

[0021] 200. Support assembly; 210. Frame; 211. First rod; 212. Second rod; 213. Third rod; 220. Support plate; 221. First guide rail; 230. Counterweight; 240. Suspension pipe; 250. Suspension rope; 260. Load-bearing support; 270. Reinforcing component; 280. Reinforcing rod;

[0022] 300, Suspension assembly; 310, Mounting post; 311, Second guide rail; 320, Mounting shaft; 321, First mounting part; 322, Second mounting part;

[0023] 400. Tires. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] This utility model provides a tire modal testing device, including a vibrator 100, a support assembly 200, and a suspension assembly 300.

[0030] Reference Figure 1 Specifically, the vibrator 100 is used to excite the tire 400; the support assembly 200 includes a frame 210 and a support plate 220 disposed at the bottom of the frame 210. The support plate 220 is provided with a first guide rail 221 along a first direction. The vibrator 100 is mounted on the first guide rail 221 and can move along the first guide rail 221; the suspension assembly 300 is disposed along a second direction, which is perpendicular to the horizontal plane where the first direction is located. The suspension assembly 300 is used to suspend the tire 400 so that the tire 400 is positioned above the vibrator 100.

[0031] It should be noted that the first direction is the X direction, and the second direction is the Z direction.

[0032] In this embodiment, a vibrator 100 is used to excite the tire 400, which can improve the detection efficiency of the tire 400 modal test, avoid the problem of difficulty in controlling the force and accuracy when manually tapping the tire 400, reduce the test data deviation caused by human factors, and improve the accuracy of the test data. In addition, the vibrator 100 is mounted on the first guide rail 221 of the support plate 220 and can move along it, expanding the working area of ​​the vibrator 100 to meet the modal testing needs of the tire 400 under various working conditions.

[0033] The vibrator 100 is a device that converts electrical energy into mechanical vibration energy. The vibrator 100 can produce different mechanical effects through different combination modes, enabling equipment to perform circular motion or linear vibration to meet various practical needs. In this embodiment, the vibrator 100 needs to induce linear vibration of the tire tread at the bottom of the suspended tire 400. It can control the vibration frequency and amplitude of the vibrating body by changing the direction and magnitude of the current, achieving precise vibration control. It should be noted that the vibrator 100 is existing technology, and this invention also makes improvements in this area; therefore, its principle will not be described in detail.

[0034] Reference Figure 1 In some embodiments, the support plate 220 is made of reinforced density board to improve its load-bearing capacity. Furthermore, the support plate 220 is 2m long, 1m wide, and 0.05m high. Of course, in actual design, the dimensions of the support plate 220 can be designed according to actual needs. Additionally, the first guide rail 221 is 1m long and 14mm wide. Of course, in actual design, the dimensions of the first guide rail 221 can be designed according to actual needs.

[0035] In some embodiments, the vibrator 100 has mounting holes at its bottom, allowing it to be mounted on the first guide rail 221 of the support plate 220 using a first connector, and enabling it to move along the first guide rail 221. Furthermore, the first connector can be designed as a bolt; in actual design, the structure of the first connector can be tailored to specific needs.

[0036] Reference Figure 1 , Figure 2In some embodiments, the suspension assembly 300 includes a mounting post 310, with a mounting shaft 320 disposed on the side of the mounting post 310 near the vibrator 100. The mounting shaft 320 is used to mount the tire 400 and can adapt to the modal testing requirements of the tire 400 under various working conditions. Furthermore, the mounting post 310 is provided with a second guide rail 311, which is arranged along a second direction. The mounting shaft 320 is mounted on the second guide rail 311 and can move along the second guide rail 311. Specifically, the mounting shaft 320 includes a first mounting portion 321 and a second mounting portion 322 connected to the first mounting portion 321. The first mounting portion 321 is provided with multiple mounting holes, and multiple second connectors pass through the corresponding mounting holes and connect to the second guide rail 311, thereby mounting the mounting shaft 320 on the second guide rail 311. This allows the mounting shaft 320 to move up and down along the second guide rail 311, and the rim of the tire 400 is fitted onto the outside of the second mounting portion 322. The mounting shaft 320 moves along the second direction on the second guide rail 311, allowing the position of the tire 400 to be flexibly adjusted during the test, thereby simulating the compression state of the tire 400 under different loads. When the vehicle carries different weights of cargo or personnel, the vertical pressure on the tire 400 changes. By adjusting the position of the mounting shaft 320 on the second guide rail 311, the tire 400 can be lowered or raised to simulate the working conditions of the tire 400 under different compression levels, thereby obtaining the modal parameters under the corresponding conditions and providing data for studying the load-bearing performance of the tire 400.

[0037] In some embodiments, the second connector can be designed as a bolt. In actual design, the structure of the second connector can be designed according to actual needs.

[0038] Reference Figure 1 In some embodiments, the mounting post 310 is a rectangular steel post with a square base, a side length of 0.2m, a height of 1.8m, and a wall thickness of 20mm. Of course, in actual design, the shape and size of the mounting post 310 can be designed according to actual needs. Furthermore, the second guide rail 311 has a length of 1.2m and a width of 30mm. Of course, in actual design, the dimensions of the second guide rail 311 can be designed according to actual needs.

[0039] Reference Figure 1In some embodiments, a counterweight 230 is provided on the side of the support plate 220 away from the mounting column 310 to balance the center of gravity. The mounting column 310, located on one side of the support plate 220 to suspend the tire 400, causes the device's center of gravity to shift towards the mounting column 310, posing a risk of tipping over or swaying. The counterweight 230, installed on the side of the support plate 220 away from the mounting column 310, generates a counter-torque through its own weight, effectively counteracting the center of gravity shift caused by the mounting column 310 and the tire 400. This stabilizes the overall center of gravity of the device near the bottom center, ensuring a stable posture during operations such as vibrations from the vibrator 100 and adjustments to the tire 400 position by the mounting shaft 320. This avoids testing errors caused by instability and ensures the reliability of test data. Furthermore, the counterweight 230 can be designed as an iron block, 0.8 meters long, 0.3 meters wide, and 0.2 meters high. Of course, in actual design, the material and size of the counterweight 230 can be designed according to actual needs.

[0040] Reference Figure 2 In some other embodiments, the suspension assembly 300 further includes a plurality of suspension tubes 240 and suspension ropes 250. The suspension tubes 240 are disposed on the top of the frame 210, and the two ends of the suspension ropes 250 are connected to the suspension tubes 240. The suspension ropes 250 are used to suspend the tire 400. For example, both the suspension tubes 240 and the suspension ropes 250 are designed as two. The two suspension tubes 240 are spaced apart on the top of the frame 210. One end of the suspension rope 250 is connected to one of the suspension tubes 240, and the other end of the suspension rope 250 passes through the rim of the tire 400 and connects to the other suspension tube 240. The two suspension ropes 250 are arranged crosswise, thereby suspending the tire 400 above the vibrator 100. The vibrator 100 performs modal testing on the tire 400. By suspending the tire 400 by passing the two suspension ropes 250 crosswise through the rim, the working conditions of the tire 400 in a free state can be simulated, which can more realistically reflect the inherent vibration characteristics of the tire 400.

[0041] In some embodiments, the suspension pipe 240 is a rectangular hollow steel pipe with dimensions of 15mm×15mm×2000mm. Of course, in actual design, the material and dimensions of the suspension pipe 240 can be designed according to actual needs.

[0042] In some embodiments, strong magnets (not shown) are provided at both ends of the suspension tube 240. These magnets are magnetically connected to the frame 210 to limit the position of the suspension tube 240, thereby mounting it on top of the frame 210. The strong magnets simplify the installation process of the suspension tube 240. The operator simply brings the suspension tube 240 close to the corresponding position on the top of the frame 210, and the strong magnet automatically attracts it to the frame 210 using magnetic force, eliminating the need for additional tools to tighten screws or operate complex clips. Disassembly simply requires overcoming the magnetic force to remove the suspension tube 240, shortening the device assembly and debugging time and improving test preparation efficiency.

[0043] Reference Figure 1 In some embodiments, a load-bearing support 260 is provided at the bottom of the frame 210. The load-bearing support 260 is used to stabilize the frame 210. By increasing the weight at the bottom of the frame 210, the load-bearing support 260 effectively lowers the center of gravity of the device, making the tire 400 modal testing device more stable during the test and preventing the frame 210 from shaking during the modal test and affecting the test measurement results. In addition, load-bearing supports 260 are provided at all four corners of the bottom of the frame 210, forming a symmetrical support structure and improving the balance of forces. Furthermore, the load-bearing support 260 is cylindrical with a diameter of 300mm and a height of 60mm. Of course, in actual design, the shape and size of the load-bearing support 260 can be designed according to actual needs.

[0044] Reference Figure 2 In some embodiments, the frame 210 includes four first rods 211 arranged along a first direction, four second rods 212 arranged along a second direction, and four third rods 213 arranged along a third direction. The first rods 211, second rods 212, and third rods 213 are connected end-to-end to form a cuboid frame 210, which can distribute and bear external forces in multiple dimensions. When the vibrator 100 applies excitation to the tire 400 to generate vibration, the cuboid frame 210 can evenly transfer the vibration load to each rod, avoiding local stress concentration. It should be noted that the third direction is the Y direction.

[0045] In some embodiments, the first rod 211, the second rod 212, and the third rod 213 are all square steel pipes. The first rod 211 and the second rod 212 are of equal length, each 2m long, with a cross-sectional size of 25mm × 25mm and a wall thickness of 5mm. The third rod 213 is 1m long, with a cross-sectional size of 25mm × 25mm and a wall thickness of 5mm. Of course, in actual design, the dimensions of the first rod 211, the second rod 212, and the third rod 213 can be designed according to actual needs.

[0046] Reference Figure 2 In some embodiments, the support assembly 200 further includes multiple reinforcing members 270. The top of the second rod 212 connects with the first rod 211 and the second rod 212 to form an installation angle. The multiple reinforcing members 270 are respectively disposed within the corresponding installation angles. The reinforcing members 270 are used to maintain the strength and stability of the frame 210. By filling the space at the installation angles, the reinforcing members 270 enhance the rigidity of the connection and improve the overall torsional and bending resistance of the frame 210. For example, during high-frequency excitation or high-load testing, the reinforcing members 270 can prevent cracking or displacement at the rod connection, maintain the geometric stability of the frame 210, and ensure the reliability of the testing device under high-intensity use.

[0047] Reference Figure 1 In some embodiments, reinforcing rods 280 are provided on opposite sides of the frame 210 parallel to the first direction. One end of the reinforcing rod 280 is connected to the first rod 211, and the other end is connected to the second rod 212. The reinforcing rod 280, the first rod 211, and the second rod 212 form a triangular structure, which can effectively disperse and transmit external forces, thereby reinforcing the frame 210. Furthermore, the reinforcing rod 280 is a steel pipe, 1.2m long, with a trapezoidal cut at the bottom measuring 25mm × 40mm, and a wall thickness of 5mm. Of course, in actual design, the dimensions of the reinforcing rod 280 can be designed according to actual needs.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A tire modal testing device, characterized in that, include: A vibrator, used to excite the tire; A support assembly includes a frame and a support plate disposed at the bottom of the frame. The support plate is provided with a first guide rail along a first direction. The vibrator is mounted on the first guide rail and can move along the first guide rail. A suspension assembly is provided along a second direction, which is perpendicular to the horizontal plane containing the first direction, and the suspension assembly is used to suspend the tire so as to position the tire above the vibrator.

2. The tire modal testing device according to claim 1, characterized in that, The suspension assembly includes a mounting post, and a mounting shaft is provided on the side of the mounting post near the vibrator, the mounting shaft being used to mount the tire.

3. The tire modal testing device according to claim 2, characterized in that, The mounting post is provided with a second guide rail, which is arranged along the second direction. The mounting shaft is mounted on the second guide rail and can move along the second guide rail.

4. The tire modal testing device according to claim 2 or 3, characterized in that, A counterweight is provided on the side of the support plate away from the mounting column, and the counterweight is used to balance the center of gravity.

5. The tire modal testing device according to claim 1, characterized in that, The suspension assembly also includes several suspension tubes and suspension ropes. Several suspension tubes are disposed on the top of the frame, and the two ends of several suspension ropes are connected to the suspension tubes. The suspension ropes are used to suspend the tires.

6. The tire modal testing device according to claim 5, characterized in that, A powerful magnet is provided at each end of the suspension tube, and the powerful magnet is magnetically connected to the frame to limit the position of the suspension tube.

7. The tire modal testing apparatus according to claim 1 or 5, characterized in that, The bottom of the frame is provided with a load-bearing support, which is used to stabilize the frame.

8. The tire modal testing device according to claim 1 or 5, characterized in that, The frame includes four first rods arranged along the first direction, four second rods arranged along the second direction, and four third rods arranged along a third direction. The first rods, the second rods, and the third rods are connected end to end to each other. The third direction is perpendicular to the plane containing the first direction and the second direction.

9. The tire modal testing device according to claim 8, characterized in that, The support assembly also includes multiple reinforcing members. The top of the second rod is connected to the first rod and the second rod to form an installation angle, and the multiple reinforcing members are respectively arranged in the corresponding installation angle.

10. The tire modal testing device according to claim 8, characterized in that, The frame is provided with reinforcing rods on opposite sides parallel to the first direction. One end of the reinforcing rod is connected to the first rod, and the other end of the reinforcing rod is connected to the second rod.

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