Tire rigidity testing device

Abstract

The invention provides a tire rigidity testing device, and relates to the technical field of rigidity testing, the tire rigidity testing device comprises a base station, the upper end of the base station is slidably provided with a connecting mechanism, the connecting mechanism is fixedly connected with a testing table, the left end of the testing table is provided with a testing cavity, the side end of the testing cavity is communicated with a rotating groove, and a testing sleeve is rotatably arranged in the rotating groove; first through holes are formed in the left end and the right end of the test sleeve in a penetrating mode, test blocks are fixedly arranged on the side walls of the first through holes and make contact with a to-be-tested tire, the to-be-tested tire is connected with a test positioning mechanism, and the test positioning mechanism can drive the to-be-tested tire to rotate in the front-back direction and is installed on an installation block. The mounting block is in sliding connection with a second sliding groove in the front end of the supporting table, a driving mechanism is mounted between the mounting block and the supporting table, the supporting table is fixedly arranged at the rear end of the base table, and the test positioning mechanism drives a to-be-tested tire to rotate in the front-back direction, so that rigidity testing of the to-be-tested tire in a dynamic state is achieved. And the reliability of the rigidity test of the to-be-tested tire is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stiffness testing, in particular to a tire stiffness testing device. Background Art

[0002] Referring to CN201110246104 - Tire Coupling Stiffness Tester, it is disclosed that a six-component force sensor can accurately measure the force in all directions of the tire. A vertical loading mechanism and a three-axis loading platform composed of a longitudinal loading mechanism, a lateral loading mechanism and a torsional loading mechanism load the tire through a servo motor. The displacement of the tire in all directions can be accurately measured by the sensor, thereby measuring the stiffness of the tire under coupled force. However, the above stiffness test is performed when the tire is static, and no stiffness test is disclosed when the tire is dynamic, resulting in poor reliability of the test results. Summary of the Invention

[0003] The present invention provides a tire stiffness testing device to solve the technical problem that the stiffness test is performed under a static state of the tire and does not disclose the stiffness test under a dynamic state of the tire, resulting in poor reliability of the test results.

[0004] In order to solve the above technical problems, the present invention discloses a tire stiffness testing device, including a base, an upper end of the base is slidably provided with a connecting mechanism, the connecting mechanism is fixedly connected to the test platform, a test cavity is provided at the left end of the test platform, the side end of the test cavity is connected with a rotating groove, a test sleeve is rotatably provided in the rotating groove, a through hole 1 is penetrated by the left and right ends of the test sleeve, a test block is fixedly provided on the side wall of the through hole 1, the test block contacts the tire to be tested, the tire to be tested is connected to a test positioning mechanism, the test positioning mechanism can drive the tire to be tested to rotate in the front and rear directions, the test positioning mechanism is installed on the mounting block, the mounting block is slidably connected to the sliding groove 2 at the front end of the support platform, a driving mechanism is installed between the mounting block and the support platform, and the support platform is fixedly arranged at the rear end of the base.

[0005] Preferably, the connecting mechanism includes a sliding groove 1 provided at the upper end of the base, a threaded rod 1 rotatably provided in the sliding groove 1, the threaded rod 1 is fixedly connected to the motor 1, the motor 1 is fixedly provided in the base, threaded blocks are symmetrically provided on the left and right sides of the threaded rod 1, the threaded blocks are slidably connected to the sliding groove 1, the upper ends of the threaded blocks are fixedly connected to the fixed blocks, the fixed blocks on the left and right sides are respectively fixedly connected to the left and right ends of the test bench, a laser rangefinder 1 is installed at the left end of the sliding groove 1, and the laser rangefinder 1 is used to detect the distance between the left end of the sliding groove 1 and the threaded block on the left side.

[0006] Preferably, the driving mechanism includes motor 2, which is fixedly arranged at the upper end of the support platform. Motor 2 is fixedly connected to the cylindrical section of threaded rod 2. The cylindrical section of threaded rod 2 passes through the upper end of the support platform and enters into sliding groove 2 and is fixedly connected to the threaded section of threaded rod 2. The threaded section of threaded rod 2 is threadedly connected to the mounting block. Laser rangefinder 2 is installed at the upper end of sliding groove 2. Laser rangefinder 2 is used to detect the distance between the upper end of sliding groove 2 and the upper end of the mounting block.

[0007] Preferably, the test positioning mechanism includes motor three, which is fixedly arranged on the side of the upper end of the mounting block away from threaded rod two. Motor three is fixedly connected to the drive shaft, and the drive shaft passes through the mounting block and is fixedly connected to the upper end of the mounting plate. An angle sensor is installed on the drive shaft for detecting the rotation angle of the drive shaft and the mounting plate connected thereto.

[0008] Preferably, the test positioning mechanism also includes motor four, which is fixedly arranged at the left end of the mounting plate, and is fixedly connected to rotating shaft one, which passes through the mounting plate and is fixedly connected to rotating disk one, and rotating disk one is rotatably arranged at the right end of the mounting plate, and the end of rotating disk one away from the mounting plate is fixedly connected to the six-point sensor, the six-point sensor is fixedly connected to rotating shaft two, and rotating shaft two is fixedly connected to rotating disk two, and rotating disk two is correspondingly arranged in through hole one.

[0009] Preferably, a plurality of cavities are evenly distributed around the inner circumference of the rotating disk 2, the end of the cavity away from the rotating shaft 2 is slidably connected to the sliding block, the sliding block is fixedly connected to the positioning block, the end of the sliding block away from the positioning block is fixedly connected to the sealing block, the sealing block and the cavity are slidably connected, and a spring is fixed between the sealing block and the side end of the cavity, and the spring is sleeved on the sliding block.

[0010] Preferably, a passage is provided inside the rotating shaft 2, the inlet of the passage is connected to the air intake pump, the air intake pump is fixedly arranged on the rotating shaft 2, the side end of the passage is circumferentially connected with a plurality of through holes 2, the plurality of through holes 2 are connected one-to-one with a plurality of cavities, the end of the passage away from the inlet is connected to the horizontal section of the bellows, the horizontal section of the bellows is fixedly connected to the end of the rotating shaft 2 away from the six-minute sensor, a valve is installed on the horizontal section of the bellows, the vertical section of the bellows is connected to the air blowing hood, and the air blowing hood is arranged at the end of the vertical section of the bellows away from the horizontal section of the bellows.

[0011] Preferably, the air blowing hood is provided corresponding to the test block, and the vertical section of the bellows is fixedly connected to the connecting block, and the connecting block is fixedly connected to a sliding block provided corresponding to the test block.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The connecting mechanism can drive the test bench to move left and right, and the test bench drives the test block to move left and right. There is a tendency for the test block and the tire to be tested to move relative to each other, thereby testing the lateral stiffness of the tire to be tested. The mounting block slides up and down along the second sliding groove. When the mounting block moves up and down, it can drive the test positioning mechanism to move up and down. The test positioning mechanism drives the tire to be tested up and down. There is a tendency for the tire to be tested and the test block to move relative to each other, thereby testing the longitudinal stiffness of the tire to be tested. The test positioning mechanism can drive the tire to be tested to deflect in the left and right directions, so that the tire to be tested and the test block have a deflection tendency (simulating the steering of a car tire), thereby testing the torsional stiffness of the tire to be tested. The tests of lateral stiffness, longitudinal stiffness, and torsional stiffness are independent of each other and do not interfere with each other. 2. When the test positioning mechanism drives the tire to be tested to rotate in the front-to-back direction (simulating the rotation of the tire when the car is moving), the tire to be tested can drive the test block and its connected test sleeve to rotate. The test sleeve rotates along the rotation groove, so that the test block and test sleeve always remain in a relatively stationary state. At this time, the lateral stiffness, longitudinal stiffness and torsional stiffness of the tire to be tested can be tested while rotating in the front-to-back direction, realizing the stiffness test of the tire to be tested under dynamic conditions and improving the reliability of the stiffness test of the tire to be tested.

[0013] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the test bench connection structure of the present invention; Figure 3 for Figure 2 Schematic diagram of the enlarged structure of area A in .

[0015] In the figure: 1. base; 2. sliding groove 1; 3. threaded block; 4. fixing block; 5. test table; 6. support table; 7. motor 2; 8. sliding groove 2; 9. threaded rod 2; 10. motor 3; 11. mounting block; 12. mounting plate; 13. drive shaft; 14. test cavity; 15. rotating groove; 16. test sleeve; 17. test block; 18. through hole 1; 19. motor 4; 20. threaded rod 1; 21. motor 1; 22. rotating shaft 1; 23. rotating disk 1; 24. six-point sensor; 25. rotating shaft 2; 26. passage; 27. through hole 2; 28. valve; 29. ​​bellows; 30. connecting block; 31. blow hood; 32. cavity; 33. sealing block; 34. rotating disk 2; 35. sliding block; 36. positioning block; 37. spring; 38. intake pump. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0017] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0018] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides a tire stiffness testing device, such as Figure 1-Figure 3As shown, it includes a base 1, the upper end of the base 1 is slidably provided with a connecting mechanism, the connecting mechanism is fixedly connected to the test table 5, the left end of the test table 5 is provided with a test cavity 14, the side end of the test cavity 14 is connected with a rotating groove 15, and a test sleeve 16 is rotatably provided in the rotating groove 15, and the left and right ends of the test sleeve 16 are penetrated by a through hole 18, and the side wall of the through hole 18 is fixedly provided with a test block 17, the test block 17 is in contact with the tire to be tested, and the tire to be tested is connected to the test positioning mechanism, and the test positioning mechanism can drive the tire to be tested to rotate along the front and rear directions, and the test positioning mechanism is installed on the mounting block 11, and the mounting block 11 is slidably connected to the sliding groove 2 8 at the front end of the support platform 6, and a driving mechanism is installed between the mounting block 11 and the support platform 6, and the support platform 6 is fixedly set at the rear end of the base 1.

[0019] The beneficial effects of the above technical solution are: When the tire to be tested is connected to the test positioning mechanism, it is in an upright state or an inclined state, and the test block 17 in the test bench 5 contacts the tire to be tested. The test block 17 has a rough end, so that the friction between the test block 17 and the tire to be tested is large enough, and the test block 17 and the tire to be tested cannot move relative to each other, and always maintain a relatively static state. The connecting mechanism can drive the test bench 5 to move left and right, and the test bench 5 drives the test block 17 to move left and right. There is a tendency for the test block 17 and the tire to be tested to move relative to each other, so that the lateral stiffness of the tire to be tested is tested, and the mounting block 11 slides up and down along the sliding groove 8. When the mounting block 11 moves up and down, it can drive the test positioning mechanism to move up and down, and the test positioning mechanism drives the tire to be tested to move up and down. There is a tendency for the tire to be tested and the test block 17 to move relative to each other, so that the longitudinal stiffness of the tire to be tested is tested, and the test positioning mechanism can drive the tire to be tested to move left and right The test block 17 and the test sleeve 16 are rotated along the rotation groove 15, so that the test block 17 and the test sleeve 16 always remain in a relatively static state. At this time, the tire to be tested can still perform the above-mentioned lateral stiffness, longitudinal stiffness and torsional stiffness tests when rotating in the front-rear direction, thereby realizing the stiffness test of the tire to be tested under dynamic conditions, improving the reliability of the stiffness test of the tire to be tested, and solving the technical problem that the stiffness test is performed when the tire is static, and the stiffness test is not performed when the tire is dynamic, resulting in poor reliability of the test results.

[0020] Example 2 On the basis of Example 1, Figure 1-Figure 3As shown, the connection mechanism includes a sliding groove 2 provided at the upper end of the base 1, a threaded rod 20 is rotatably provided in the sliding groove 2, the threaded rod 20 is fixedly connected to a motor 21, and the motor 21 is fixedly provided in the base 1, threaded blocks 3 are symmetrically provided on the left and right sides of the threaded rod 20, the threaded blocks 3 are slidably connected to the sliding groove 2, the upper ends of the threaded blocks 3 are fixedly connected to fixed blocks 4, and the fixed blocks 4 on the left and right sides are respectively fixedly connected to the left and right ends of the test bench 5, and a laser rangefinder is installed at the left end of the sliding groove 2, and the laser rangefinder is used to detect the distance between the left end of the sliding groove 2 and the threaded block 3 on the left side; The driving mechanism includes a second motor 7, which is fixedly mounted on the upper end of the support platform 6. The second motor 7 is fixedly connected to the cylindrical section of the second threaded rod 9. The cylindrical section of the second threaded rod 9 passes through the upper end of the support platform 6 and enters the second sliding groove 8 and is fixedly connected to the threaded section of the second threaded rod 9. The threaded section of the second threaded rod 9 is threadedly connected to the mounting block 11. A second laser rangefinder is mounted on the upper end of the second sliding groove 8. The second laser rangefinder is used to detect the distance between the upper end of the second sliding groove 8 and the upper end of the mounting block 11. The test positioning mechanism includes a motor three 10, which is fixedly arranged on the side of the upper end of the mounting block 11 away from the threaded rod two 9. The motor three 10 is fixedly connected to the drive shaft 13. The drive shaft 13 passes through the mounting block 11 and is fixedly connected to the upper end of the mounting plate 12. An angle sensor is installed on the drive shaft 13 for detecting the rotation angle of the drive shaft 13 and the mounting plate 12 connected thereto.

[0021] The beneficial effects of the above technical solution are: When the connecting mechanism drives the test bench 5 to move left and right, the control motor 21 is operated, the motor 21 drives the threaded rod 20 to rotate, the threaded rod 20 drives the threaded block 3 to slide left and right along the sliding groove 2, the threaded block 3 drives the fixed block 4 to move left and right, and the fixed block 4 drives the test bench 5 to move left and right. After the test block 17 in the test bench 5 contacts the tire to be tested, the laser rangefinder 1 is turned on to work. At this time, when the test block 17 and the tire to be tested have a tendency to move left and right, a lateral force can be applied to the tire to be tested. The detection change value of the laser rangefinder 1 is the movement distance of the test bench 5 in the left and right direction, that is, the lateral deformation value of the tire to be tested. The lateral stiffness of the tire to be tested can be obtained from the lateral force applied to the tire to be tested by the test block 17 and the detection change value of the laser rangefinder 1. When the motor 27 is working, it drives the threaded rod 29 to rotate. When the threaded rod 29 rotates, it drives the mounting block 11 to slide up and down along the sliding groove 28. The mounting block 11 drives the test positioning mechanism to move up and down until the tire to be tested on the test positioning mechanism contacts the test block 17. Then, the laser rangefinder 2 is turned on to work. At this time, when the test block 17 and the tire to be tested have a tendency to move up and down, a longitudinal force can be applied to the tire to be tested. The detection change value of the laser rangefinder 2 is the movement distance of the mounting block 11 in the up and down direction, which is the longitudinal deformation value of the tire to be tested. The longitudinal force applied to the tire to be tested by the test block 17 and the detection change value of the laser rangefinder 2 can be used to obtain the longitudinal stiffness of the tire to be tested. The laser rangefinder 1 and the laser rangefinder 2 are not shown in the drawings of the specification. Figure 1-Figure 3 Indicated in; After the test block 17 in the test bench 5 contacts the tire to be tested, the angle sensor starts to work. When the motor 3 10 is working, it drives the drive shaft 13 to rotate. The drive shaft 13 drives the mounting plate 12 to rotate, thereby driving the tire to be tested connected to the mounting plate 12 to rotate. When the tire to be tested and the test block 17 have a deflection tendency, a torque is applied to the tire to be tested. The rotation angle of the drive shaft 13 and the mounting plate 12 connected thereto, detected by the angle sensor, is the torsional angle of the tire to be tested. The torsional stiffness of the tire to be tested can be obtained based on the torque applied to the tire to be tested and the torsional angle of the tire to be tested. Motor 1 21, motor 2 7 and motor 3 10 work independently of each other without interfering with each other, thereby achieving the purpose of independent testing of lateral stiffness, longitudinal stiffness and torsional stiffness, and can also test the lateral stiffness, longitudinal stiffness and torsional stiffness of the tire to be tested at the same time.

[0022] Example 3 On the basis of Example 2, Figure 1-Figure 3 As shown, the test positioning mechanism also includes a motor 4 19, which is fixedly arranged at the left end of the mounting plate 12, and the motor 4 19 is fixedly connected to the rotating shaft 1 22, which passes through the mounting plate 12 and is fixedly connected to the rotating disk 1 23, and the rotating disk 1 23 is rotatably arranged at the right end of the mounting plate 12, and the end of the rotating disk 1 23 away from the mounting plate 12 is fixedly connected to the six-point sensor 24, the six-point sensor 24 is fixedly connected to the rotating shaft 2 25, and the rotating shaft 25 is fixedly connected to the rotating disk 2 34, and the rotating disk 2 34 is correspondingly arranged in the through hole 18; A plurality of cavities 32 are evenly distributed around the interior of the second rotating disk 34. The end of each cavity 32 away from the second rotating shaft 25 is slidably connected to a sliding block 35, which is fixedly connected to a positioning block 36. The end of the sliding block 35 away from the positioning block 36 is fixedly connected to a sealing block 33. The sealing block 33 and the cavity 32 are slidably connected. A spring 37 is fixedly provided between the sealing block 33 and the side end of the cavity 32, and the spring 37 is sleeved on the sliding block 35. A passage 26 is provided inside the second rotating shaft 25. The inlet of the passage 26 is connected to the air intake pump 38. The air intake pump 38 is fixedly arranged on the second rotating shaft 25. The side end of the passage 26 is circumferentially connected to a plurality of second through holes 27. The plurality of second through holes 27 are connected to the plurality of cavities 32 in a one-to-one correspondence. The end of the passage 26 away from the inlet is connected to the horizontal section of the bellows 29. The horizontal section of the bellows 29 is fixedly connected to the end of the second rotating shaft 25 away from the six-minute sensor 24. A valve 28 is installed on the horizontal section of the bellows 29. The vertical section of the bellows 29 is fixedly connected to the air blowing hood 31. The vertical section of the bellows 29 is connected to the air blowing hood 31, and the air blowing hood 31 is provided at the end of the vertical section of the bellows 29 away from the horizontal section of the bellows 29. The air blowing hood 31 is provided corresponding to the test block 17 , and the vertical section of the bellows 29 is fixedly connected to the connecting block 30 , and the connecting block 30 is fixedly connected to the sliding block 35 provided corresponding to the test block 17 .

[0023] The beneficial effects of the above technical solution are: When connecting the test positioning mechanism to the tire to be tested, first put the tire to be tested on the positioning block 36 on the second rotating disk 34. The tire to be tested can be set in an upright state or tilted in the left and right directions. Control the air intake pump 38 to work. The air intake pump 38 sends gas into the passage 26. The gas enters the cavity 32 through the second through hole 27, pushing the sealing block 33 in the cavity 32 to slide in the direction away from the second rotating shaft 25. The sealing block 33 drives the sliding block 35 to move, and the sliding block 35 drives the positioning block 36 to move. The spring 37 is compressed, and the circumferentially arranged positioning blocks 36 squeeze and fix the inner ring of the tire to be tested, realizing the test positioning mechanism. The connection between the positioning mechanism and the tire to be tested is fixed. Under the elastic action of the spring 37 and the air shock absorption of the cavity 32, the second through hole 27 and the passage 26, the fixing stability between the positioning block 36 and the tire to be tested can be improved. By controlling the operation of the air intake pump 38, the air pressure in the passage 26 can be adjusted, thereby adjusting the fixing force between the positioning block 36 and the tire to be tested. The sealing block 33 slides along the cavity 32, allowing the positioning block 36 to fix tires to be tested with different inner diameters. First, the motor 1 21 is controlled to operate so that the rotating disk 2 34 extends into the through hole 18. Then, the motor 2 7 is controlled to operate so that the tire to be tested contacts the test block 17. When the motor 4 19 is in operation, it can drive the rotating shaft 1 22 to rotate, the rotating shaft 1 22 drives the rotating disk 1 23 to rotate, the rotating disk 1 23 drives the six-point sensor 24 and the rotating shaft 2 25 to rotate, the rotating shaft 2 25 drives the rotating disk 2 34 to rotate, and the rotating disk 2 34 drives the tire to be tested to rotate in the front-to-back direction, thereby realizing the stiffness test of the tire to be tested under dynamic conditions. The setting of the six-point sensor 24 can detect the longitudinal force, lateral force and torque applied to the tire to be tested; When the sliding block 35 moves, it drives the connecting block 30 to move, and the connecting block 30 drives the bellows 29 to extend. When the positioning block 36 squeezes and fixes the inner ring of the tire to be tested, the sliding block 35 drives the blowing hood 31 connected to the bellows 29 to move to the corresponding position of the contact end between the tire to be tested and the test block 17. In order to avoid friction overheating between the tire to be tested and the test block 17, the valve 28 can be opened during the rotation of the rotating shaft 25. At this time, the air intake pump 38 always keeps working and makes the air pressure in the cavity 32, the second through hole 27 and the passage 26 consistent with that when the valve 28 is not opened. After the valve 28 is opened, the air pressure in the cavity 32, the second through hole 27 and the passage 26 always remains unchanged. After the valve 28 is opened, the gas in the passage 26 is blown to the contact end of the tire to be tested and the test block 17 through the bellows 29 and the blowing hood 31, thereby cooling the tire to be tested and preventing excessive temperature from affecting the stiffness test result of the tire to be tested.

[0024] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A tire stiffness testing device, characterized in that: The invention comprises a base (1), the upper end of which is slidably provided with a connection mechanism, the connection mechanism being fixedly connected to a test bench (5), the left end of which is provided with a test cavity (14), the side end of which is connected with a rotation groove (15), a test sleeve (16) being rotatably provided in the rotation groove (15), the left and right ends of the test sleeve (16) being penetrated by a first through hole (18), a test block (17) being fixedly provided on the side wall of the first through hole (18), the test block (17) being in contact with a tire to be tested, the tire to be tested being connected to a test positioning mechanism, the test positioning mechanism being able to drive the tire to be tested to rotate in a front-rear direction, the test positioning mechanism being mounted on a mounting block (11), the mounting block (11) being slidably connected to a second sliding groove (8) at the front end of a support platform (6), a driving mechanism being mounted between the mounting block (11) and the support platform (6), the support platform (6) being fixedly arranged at the rear end of the base (1).

2. A tire stiffness testing device according to claim 1, characterized in that: The connection mechanism comprises a sliding groove (2) arranged at the upper end of a base (1), a threaded rod (20) rotatably arranged in the sliding groove (2), the threaded rod (20) being fixedly connected to a motor (21), the motor (21) being fixedly arranged in the base (1), threaded blocks (3) being symmetrically arranged on the left and right sides of the threaded rod (20), the threaded blocks (3) being slidably connected to the sliding groove (2), the upper ends of the threaded blocks (3) being fixedly connected to fixed blocks (4), the fixed blocks (4) on the left and right sides being fixedly connected to the left and right ends of a test bench (5) respectively, and a laser rangefinder (1) being installed at the left end of the sliding groove (2), the laser rangefinder (1) being used to detect the distance between the left end of the sliding groove (2) and the threaded block (3) on the left side.

3. A tire stiffness testing device according to claim 1, characterized in that: The driving mechanism comprises a second motor (7), the second motor (7) is fixedly arranged at the upper end of the support platform (6), the second motor (7) is fixedly connected to the cylindrical section of the second threaded rod (9), the cylindrical section of the second threaded rod (9) penetrates the upper end of the support platform (6) into the second sliding groove (8) and is fixedly connected to the threaded section of the second threaded rod (9), the threaded section of the second threaded rod (9) is threadedly connected to the mounting block (11), and a second laser rangefinder is installed at the upper end of the second sliding groove (8), and the second laser rangefinder is used to detect the distance between the upper end of the second sliding groove (8) and the upper end of the mounting block (11).

4. A tire stiffness testing device according to claim 1, characterized in that: The test positioning mechanism comprises a motor three (10), the motor three (10) being fixedly arranged on a side of the upper end of the mounting block (11) away from the threaded rod two (9), the motor three (10) being fixedly connected to a drive shaft (13), the drive shaft (13) passing through the mounting block (11) and being fixedly connected to the upper end of the mounting plate (12), and an angle sensor being installed on the drive shaft (13) for detecting the rotation angle of the drive shaft (13) and the mounting plate (12) connected thereto.

5. A tire stiffness testing device according to claim 4, characterized in that: The test positioning mechanism also includes a motor four (19), which is fixedly arranged at the left end of the mounting plate (12), the motor four (19) is fixedly connected to the rotating shaft one (22), the rotating shaft one (22) passes through the mounting plate (12) and is fixedly connected to the rotating disk one (23), the rotating disk one (23) is rotatably arranged at the right end of the mounting plate (12), the end of the rotating disk one (23) away from the mounting plate (12) is fixedly connected to the six-point sensor (24), the six-point sensor (24) is fixedly connected to the rotating shaft two (25), the rotating shaft two (25) is fixedly connected to the rotating disk two (34), and the rotating disk two (34) is correspondingly arranged in the through hole one (18).

6. A tire stiffness testing device according to claim 5, characterized in that: A plurality of cavities (32) are evenly distributed in the circumferential direction of the inner part of the second rotating disk (34); one end of the cavity (32) away from the second rotating shaft (25) is slidably connected to the sliding block (35); the sliding block (35) is fixedly connected to the positioning block (36); one end of the sliding block (35) away from the positioning block (36) is fixedly connected to the sealing block (33); the sealing block (33) and the cavity (32) are slidably connected; and a spring (37) is fixedly provided between the side ends of the sealing block (33) and the cavity (32); the spring (37) is sleeved on the sliding block (35).

7. A tire stiffness testing device according to claim 6, characterized in that: A passage (26) is provided inside the second rotating shaft (25). The inlet of the passage (26) is communicated with an air intake pump (38). The air intake pump (38) is fixedly arranged on the second rotating shaft (25). The side end of the passage (26) is circumferentially communicated with a plurality of second through holes (27). The plurality of second through holes (27) are communicated with a plurality of cavities (32) in a one-to-one correspondence. An end of the passage (26) away from the inlet is communicated with a horizontal section of a bellows (29). The horizontal section of the bellows (29) is fixedly connected to an end of the second rotating shaft (25) away from the six-point sensor (24). A valve (28) is installed on the horizontal section of the bellows (29). The vertical section of the bellows (29) is communicated with an air blowing hood (31). The air blowing hood (31) is arranged at an end of the vertical section of the bellows (29) away from the horizontal section of the bellows (29).

8. A tire stiffness testing device according to claim 7, characterized in that: The air blowing hood (31) is arranged corresponding to the test block (17), and the vertical section of the bellows (29) is fixedly connected to the connecting block (30), and the connecting block (30) is fixedly connected to a sliding block (35) arranged corresponding to the test block (17).

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