A tire outer profile detection device under load

Abstract

This invention belongs to the field of tire testing technology and discloses a tire outer contour detection device under load, including a test platform and a guide rail. The guide rail is located at the bottom of the test platform, and a laser emitter is fixedly connected to the bottom of the inner surface of the test platform. A laser hole is opened at the top of the test platform above the laser emitter. This invention, by setting up a guide rail, laser emitter, laser hole, sliding base, and laser sensor, allows the laser emitted by the laser emitter to irradiate the tire surface through the laser hole. The meshing transmission of gears and racks causes the sliding base, carrying the laser sensor, to move along the guide rail. Thus, by utilizing the cooperation of the laser sensor and laser emitter, the entire outer contour of the tire under load can be scanned, including the portion of the tire's outer contour in contact with the test platform. The overall operation is simple and has advantages such as non-contact, high precision, and high speed.

Description

Technical Field

[0001] This invention belongs to the field of tire inspection technology, specifically a tire outer contour inspection device under load. Background Technology

[0002] As automobiles continue to evolve towards higher speeds, electrification, and heavier loads, the overall performance requirements for tires are becoming increasingly stringent. The tire's outer profile under load has thus become a key factor affecting vehicle driving quality and safety. A reasonable outer profile under load allows the tire's contact patch to approach a regular shape, achieving a uniform distribution of contact pressure. This not only improves tire grip and braking performance but also effectively reduces uneven tread wear, extending tire lifespan. Simultaneously, an optimized outer profile design reduces excessive deformation of the tire sidewall and elastic hysteresis loss during tire rolling, thereby controlling rolling resistance and contributing to improved fuel economy in gasoline vehicles and increased range in electric vehicles. Furthermore, an outer profile under load that adapts to the overall vehicle design requirements avoids reduced handling due to excessive sidewall deformation and balances driving comfort, laying a solid foundation for stable vehicle operation.

[0003] A search revealed a tire load-bearing outer contour detection device (CN220489986U). This device obtains the tire load-bearing outer contour by pressing the tire onto clay and then scanning the outer contour of the tire on the clay. However, this patent still has shortcomings in actual testing: the outer contour of the tire under load is obtained only after converting the clay as an intermediate quantity, which can easily introduce additional interference factors, such as environmental and material factors, causing deviations in the experimental results. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a tire outer contour detection device under load to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tire outer contour detection device under load, comprising a test platform and a guide rail. The guide rail is disposed at the bottom of the test platform. A laser emitter is fixedly connected to the bottom of the inner surface of the test platform. A laser hole is opened at the top of the test platform above the laser emitter. Sliding bases are movably sleeved at the bottom of the left and right ends of the guide rail. A laser sensor is fixedly connected to the side of the outer surface of the sliding base facing the test platform. Racks are fixedly sleeved in the middle of the inner walls of the left and right sides of the guide rail. A stepper motor is fixedly installed at the front end of the sliding base. A round shaft is fixedly sleeved at the other end of the output shaft of the stepper motor. The rear end of the round shaft passes through the sliding base and extends into the interior of the sliding base, and a gear is fixedly sleeved thereon. The outer surface of the gear meshes with the outer surface of the rack.

[0006] In a preferred embodiment of the present invention, upper blocks are fixedly connected to the left and right sides of the top of the guide rail, and lower blocks are fixedly connected to the bottom of the left and right ends of the guide rail, with the top of the lower blocks being movably connected to the bottom of the sliding base.

[0007] As a preferred embodiment of the present invention, the four corners of the bottom of the test platform are respectively fixedly connected to support legs, the bottom of the support legs are fixedly connected to counterweight bases, and the top of the counterweight bases are fixedly connected to the bottom of the guide rail.

[0008] As a preferred embodiment of the present invention, a back plate is fixedly connected to the rear side of the top center of the counterweight base, and a cross arm is fixedly connected to the top of the back plate.

[0009] As a preferred embodiment of the present invention, a hydraulic telescopic rod is fixedly connected to the top end of the cross arm, and the bottom end of the hydraulic telescopic rod passes through the cross arm and extends to the bottom of the cross arm and is fixedly connected to a pressure block.

[0010] As a preferred embodiment of the present invention, the left and right ends of the bottom rear side of the cross arm are respectively fixedly connected with reinforcing ribs, and the other end of the reinforcing ribs is fixedly connected to the front end of the back plate.

[0011] As a preferred embodiment of the present invention, there are multiple laser emitters and laser holes, and the multiple laser emitters and laser holes cover the entire measurement range of the test platform.

[0012] In a preferred embodiment of the present invention, the laser emitter and the laser aperture are perpendicularly aligned to each other, and the aperture diameter of the laser aperture is larger than the laser beam diameter of the laser emitter.

[0013] As a preferred embodiment of the present invention, the test platform is made of high-strength steel, and the material of the test platform is the same as that of the counterweight base.

[0014] The beneficial effects of this invention are as follows: This invention, by setting up a guide rail, a laser emitter, a laser aperture, a sliding base, and a laser sensor, allows the laser emitted by the laser emitter to illuminate the tire surface through the laser aperture. The meshing transmission of the gears and racks causes the sliding base, carrying the laser sensor, to move along the guide rail. In this way, by using the cooperation of the laser sensor and the laser emitter, the entire outer contour of the tire under load can be scanned, including the outer contour of the tire in contact with the test platform. The overall operation is simple and has the advantages of being non-contact, highly accurate, and high-speed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the front of the present invention; Figure 3 This is a schematic cross-sectional view of the side of the present invention; Figure 4 This is a schematic cross-sectional view of the top of the present invention; Figure 5 for Figure 2 A magnified schematic diagram of the local structure at point A; Figure 6 for Figure 2 A magnified view of the structure at point B in the middle; Figure 7 for Figure 4 A magnified schematic diagram of the structure at point C.

[0016] In the diagram: 1. Test platform; 2. Guide rail; 3. Laser emitter; 4. Laser aperture; 5. Sliding base; 6. Laser sensor; 7. Rack; 8. Stepper motor; 9. Round shaft; 10. Gear; 11. Upper stop; 12. Lower stop; 13. Support leg; 14. Counterweight base; 15. Back plate; 16. Cross arm; 17. Hydraulic telescopic rod; 18. Pressure block; 19. Reinforcing rib. Detailed Implementation

[0017] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 1 to 7 As shown, this embodiment of the invention provides a tire outer contour detection device under load, including a test platform 1 and a guide rail 2. The guide rail 2 is set at the bottom of the test platform 1. A laser emitter 3 is fixedly connected to the bottom of the inner surface of the test platform 1. A laser hole 4 is opened at the top of the test platform 1 above the laser emitter 3. Sliding bases 5 are movably sleeved at the bottom of the left and right ends of the guide rail 2, respectively. A laser sensor 6 is fixedly connected to the side of the outer surface of the sliding base 5 facing the test platform 1. A rack 7 is fixedly sleeved in the middle of the inner wall of the left and right sides of the guide rail 2, respectively. A stepper motor 8 is fixedly installed at the front end of the sliding base 5. A round shaft 9 is fixedly sleeved at the other end of the output shaft of the stepper motor 8. The rear end of the round shaft 9 passes through the sliding base 5 and extends into the interior of the sliding base 5 and is fixedly sleeved with a gear 10. The outer surface of the gear 10 and the outer surface of the rack 7 are meshed and connected.

[0019] Laser emitters 3 and laser apertures 4 are evenly distributed on the test platform 1 and correspond to each other. With the cooperation of laser emitters 3 and laser apertures 4, the overall outer contour of the tire under load can be scanned. At the same time, laser sensor 6 is electrically connected to the outer contour processing system through wires. The outer contour processing system mainly performs noise reduction processing on the electrical signal transmitted from laser sensor 6, and then converts the processed signal into the actual spatial coordinates of the sensor and the tire test point. Finally, a large number of discrete coordinate points are fitted and stitched together through formula to generate a continuous and complete tire outer contour curve. In addition, the stepper motors 8, gears 10, racks 7, sliding bases 5 and laser sensors 6 on the left and right sides of the guide rail 2 are the same in model, parameters and size, so that the sliding bases 5 and laser sensors 6 on both sides of the guide rail 2 can move up and down synchronously.

[0020] The guide rail 2 has upper blocks 11 fixedly connected to the left and right sides of the top, and lower blocks 12 fixedly connected to the bottom of the left and right ends of the guide rail 2. The top of the lower blocks 12 is movably connected to the bottom of the sliding base 5.

[0021] The cooperation between the upper stop 11 and the lower stop 12 will limit the movement of the sliding base 5, preventing the sliding base 5 from detaching from the guide rail 2 and falling off.

[0022] Among them, the four corners of the bottom of the test platform 1 are fixedly connected to support legs 13, the bottom of the support legs 13 are fixedly connected to counterweight bases 14, and the top of the counterweight bases 14 is fixedly connected to the bottom of the guide rail 2.

[0023] The presence of support leg 13 and counterweight base 14 will provide support and fixation for test platform 1 and guide rail 2.

[0024] The counterweight base 14 has a back plate 15 fixedly connected to the rear side of the top center, and a cross arm 16 fixedly connected to the top of the back plate 15.

[0025] The back plate 15 is used to fix the cross arm 16 and the counterweight base 14 to ensure the stability of the cross arm 16.

[0026] The top end of the cross arm 16 is fixedly connected to a hydraulic telescopic rod 17, the bottom end of the hydraulic telescopic rod 17 passes through the cross arm 16 and extends to the bottom of the cross arm 16 and is fixedly connected to a pressure block 18.

[0027] The presence of the hydraulic telescopic rod 17 and the pressure block 18 is used to apply load to the tire, thereby providing a load basis for detecting the outer contour of the tire under load.

[0028] Among them, the left and right ends of the bottom rear side of the cross arm 16 are respectively fixedly connected to the reinforcing ribs 19, and the other end of the reinforcing ribs 19 is fixedly connected to the front end of the back plate 15.

[0029] There are two reinforcing ribs 19. The presence of the two reinforcing ribs 19 is to strengthen the connection between the back plate 15 and the cross arm 16.

[0030] Among them, there are multiple laser emitters 3 and laser holes 4, and multiple laser emitters 3 and laser holes 4 cover the entire measurement range of the test platform 1.

[0031] By covering the entire measurement range with laser emitter 3 and laser aperture 4, it is possible to ensure that the laser illuminates the entire outer contour of the tire.

[0032] In this configuration, the laser emitter 3 and the laser aperture 4 are vertically aligned with each other, and the aperture of the laser aperture 4 is larger than the diameter of the laser beam from the laser emitter 3.

[0033] This design avoids the laser being blocked by the hole wall, while the laser hole 4 cannot be too large to prevent an excessively large laser hole 4 from affecting the load-bearing capacity and stability of the test platform 1.

[0034] The test platform 1 is made of high-strength steel, and the material of the test platform 1 is the same as that of the counterweight base 14.

[0035] The test platform 1 and the counterweight base 14, made of high-strength steel, can ensure the load-bearing capacity and stability of the test platform 1.

[0036] Working principle and usage process: First, select tires with good appearance quality as test tires. Then, assemble the tires onto the rims and inflate them to the required test pressure. Simultaneously, ensure the tires remain in place for the required test duration. Next, attach the test tire and rim assembly to the tire-rim fixed axle and place it in the center of the test platform 1. Then, activate the hydraulic telescopic rod 17, causing the pressure block 18 to move towards the tire and apply pressure until the test tire is loaded to the required test load. Immediately afterward, activate the laser emitter 3, allowing the laser emitted by the laser emitter 3 to irradiate the surface of the test tire through the laser hole 4. Simultaneously, activate the stepper motor 8, causing the circular shaft 9 to drive the gear 1. The rotation of the 0 causes the sliding base 5 and the laser sensor 6 to move from their initial positions under the meshing transmission of the gear 10 and the rack 7. In this way, the outer contour of the tire under load can be detected through the cooperation of the laser sensor 6 and the laser emitter 3, including the outer contour of the tire in contact with the test platform 1. Finally, the outer contour processing system is used to reduce the noise of the electrical signal transmitted from the laser sensor 6, and the processed signal is converted into the actual spatial coordinates of the sensor and the tire test point. A large number of discrete coordinate points are fitted and stitched together by formula to generate a continuous and complete tire outer contour curve.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tire outer contour detection device under load, comprising a test platform (1) and a guide rail (2), characterized in that: The guide rail (2) is set at the bottom of the test platform (1). A laser emitter (3) is fixedly connected to the bottom of the inner surface of the test platform (1). A laser hole (4) is opened at the top of the test platform (1) above the laser emitter (3). Sliding bases (5) are movably sleeved at the bottom of the left and right ends of the guide rail (2). A laser sensor (6) is fixedly connected to the side of the outer surface of the sliding base (5) facing the test platform (1). A rack (7) is fixedly sleeved in the middle of the inner wall of the left and right sides of the guide rail (2). A stepper motor (8) is fixedly installed at the front end of the sliding base (5). A round shaft (9) is fixedly sleeved at the other end of the output shaft of the stepper motor (8). The rear end of the round shaft (9) passes through the sliding base (5) and extends into the interior of the sliding base (5) and is fixedly sleeved with a gear (10). The outer surface of the gear (10) and the outer surface of the rack (7) mesh with each other.

2. The tire outer contour detection device under load according to claim 1, characterized in that: Upper blocks (11) are fixedly connected to the left and right sides of the top of the guide rail (2), and lower blocks (12) are fixedly connected to the bottom of the left and right ends of the guide rail (2). The top of the lower blocks (12) is movably connected to the bottom of the sliding base (5).

3. The tire outer contour detection device under load according to claim 1, characterized in that: The test platform (1) has four fixed support legs (13) at its bottom corners. The bottom of the support legs (13) is fixedly connected to a counterweight base (14). The top of the counterweight base (14) is fixedly connected to the bottom of the guide rail (2).

4. The tire outer contour detection device under load according to claim 3, characterized in that: A back plate (15) is fixedly connected to the rear side of the top center of the counterweight base (14), and a cross arm (16) is fixedly connected to the top of the back plate (15).

5. The tire outer contour detection device under load according to claim 4, characterized in that: A hydraulic telescopic rod (17) is fixedly connected to the top of the cross arm (16). The bottom end of the hydraulic telescopic rod (17) passes through the cross arm (16) and extends to the bottom of the cross arm (16), and is fixedly connected to a pressure block (18).

6. The tire outer contour detection device under load according to claim 4, characterized in that: The left and right ends of the bottom rear side of the cross arm (16) are respectively fixedly connected to the reinforcing ribs (19), and the other end of the reinforcing ribs (19) is fixedly connected to the front end of the back plate (15).

7. The tire outer contour detection device under load according to claim 1, characterized in that: The number of laser emitters (3) and laser holes (4) is multiple, and the multiple laser emitters (3) and laser holes (4) cover the entire measurement range of the test platform (1).

8. The tire outer contour detection device under load according to claim 1, characterized in that: The laser emitter (3) and the laser aperture (4) are vertically aligned with each other, and the aperture of the laser aperture (4) is larger than the diameter of the laser beam of the laser emitter (3).

9. The tire outer contour detection device under load according to claim 1, characterized in that: The test platform (1) is made of high-strength steel, and the material of the test platform (1) is the same as that of the counterweight base (14).

Images