A tire stiffness testing device

Abstract

The invention provides a tire stiffness testing device, which relates to the technical field of stiffness testing, and comprises a base, wherein the 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, a rotating groove is connected to the side end of the test cavity, a test sleeve is rotatably provided in the rotating groove, a through hole 1 is penetrated through 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 with a tire to be tested, the tire to be tested is connected with a test positioning mechanism, the test positioning mechanism can drive the tire to be tested to rotate along the front and rear direction, 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, the support platform is fixedly arranged at the rear end of the base, the test positioning mechanism drives the tire to be tested to rotate along the front and rear direction, the stiffness test of the tire to be tested under dynamic conditions is realized, and the reliability of the stiffness test of the tire to be tested is improved.

Description

Technical Field

[0001] The 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 testing machine, 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-way loading platform composed of a longitudinal loading mechanism, a lateral loading mechanism and a torsional loading mechanism load the tire through a servo motor, and 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, but the above stiffness test is carried out when the tire is static, and the stiffness test when the tire is dynamic is not disclosed, and the reliability of the test results is poor. Summary of the invention

[0003] The present invention provides a tire stiffness testing device, which is used to solve the technical problem that the stiffness test is performed under the static state of the tire, and the stiffness test under the dynamic state of the tire is not disclosed, and the reliability of the test result is poor.

[0004] In order to solve the above technical problems, the present invention discloses a tire stiffness testing device, including a base, a connecting mechanism is slidably provided at the upper end of the base, the connecting mechanism is fixedly connected to the test bench, a test cavity is provided at the left end of the test bench, a rotating groove is connected to the side end of the test cavity, a test sleeve is rotatably provided in the rotating groove, a through hole 1 is penetrated at 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 arranged at the upper end of the base, a threaded rod 1 is rotatably provided in the sliding groove 1, the threaded rod 1 is fixedly connected to a 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, and 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 a second motor, which is fixedly arranged at the upper end of the support platform, and is fixedly connected to the cylindrical section of the second threaded rod, and the cylindrical section of the second threaded rod passes through the upper end of the support platform into the second sliding groove and is fixedly connected to the threaded section of the second threaded rod, and the threaded section of the second threaded rod is threadedly connected to the mounting block, and a second laser rangefinder is installed at the upper end of the second sliding groove, and the second laser rangefinder is used to detect the distance between the upper end of the second sliding groove and the upper end of the mounting block.

[0007] Preferably, the test positioning mechanism includes motor three, which is fixedly arranged on the upper end of the mounting block away from the side of threaded rod two, and is fixedly connected to the drive shaft. 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 a rotating shaft one, which passes through the mounting plate and is fixedly connected to a rotating disk one, and a rotating disk one is rotatably arranged at the right end of the mounting plate, and an end of the rotating disk one away from the mounting plate is fixedly connected to a six-point sensor, and the six-point sensor is fixedly connected to a rotating shaft two, and the rotating shaft two is fixedly connected to a rotating disk two, and the rotating disk two is correspondingly arranged in the through hole one.

[0009] Preferably, a plurality of cavities are evenly distributed on the inner circumference of rotating disk 2, one end of the cavity away from rotating shaft 2 is slidably connected to the sliding block, the sliding block is fixedly connected to the positioning block, one 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 fixedly provided 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-point sensor, a valve is installed on the horizontal section of the bellows, the vertical section of the bellows is connected to the blowing hood, and the blowing hood is arranged at one end of the vertical section of the bellows away from the horizontal section of the bellows.

[0011] Preferably, the air blowing hood is arranged 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 arranged corresponding to the test block.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 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, so as to test 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 to move up and down. There is a tendency for the tire to be tested and the test block to move relative to each other. The longitudinal stiffness of the tire to be tested is 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). The torsional stiffness of the tire to be tested is tested. The tests of lateral stiffness, longitudinal stiffness and torsional stiffness are independent of each other and do not interfere with each other.

[0014] 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 the test sleeve connected to it to rotate, and the test sleeve rotates along the rotation groove, so that the test block and the test sleeve always remain in a relatively static 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, thereby 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.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the connection structure of the test bench of the present invention;

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of area A in FIG.

[0020] In the figure: 1, base; 2, sliding groove one; 3, threaded block; 4, fixed block; 5, test bench; 6, support table; 7, motor two; 8, sliding groove two; 9, threaded rod two; 10, motor three; 11, mounting block; 12, mounting plate; 13, drive shaft; 14, test cavity; 15, rotating groove; 16, test sleeve; 17, test block; 18, through hole one; 19, motor four; 20, threaded rod one; 21, motor one; 22, rotating shaft one; 23, rotating disk one; 24, six-point sensor; 25, rotating shaft two; 26, passage; 27, through hole two; 28, valve; 29, bellows; 30, connecting block; 31, blowing hood; 32, cavity; 33, sealing block; 34, rotating disk two; 35, sliding block; 36, positioning block; 37, spring; 38, intake pump. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with 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.

[0022] In addition, in the present invention, the descriptions of "first", "second", etc. 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 of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The present invention provides the following embodiments

[0024] Example 1

[0025] 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 bench 5, the left end of the test bench 5 is provided with a test cavity 14, the side end of the test cavity 14 is connected with a rotating groove 15, a test sleeve 16 is rotatably provided in the rotating groove 15, the left and right ends of the test sleeve 16 are penetrated by a through hole 18, 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, the tire to be tested is connected to the test positioning mechanism, the test positioning mechanism can drive the tire to be tested to rotate along the front and rear directions, the test positioning mechanism is installed on the mounting block 11, the mounting block 11 is slidably connected to the sliding groove 28 at the front end of the support platform 6, a driving mechanism is installed between the mounting block 11 and the support platform 6, and the support platform 6 is fixedly arranged at the rear end of the base 1.

[0026] The beneficial effects of the above technical solution are:

[0027] When the tire to be tested is connected to the test positioning mechanism, it is in an upright state or an inclined state. 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 they 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 as to test the lateral stiffness of the tire to be tested. The mounting block 11 slides up and down along the sliding groove 8, and when the mounting block 11 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 to move up and down, and there is a tendency for the tire to be tested and the test block 17 to move relative to each other, so as to test the longitudinal stiffness of the tire to be tested. The test positioning mechanism can drive the tire to be tested to move left and right The lateral stiffness test of the tire to be tested is carried out by deflecting the tire to be tested and the test block 17 in the forward and backward direction (simulating the rotation of the tire when the car is moving). The lateral stiffness test, the longitudinal stiffness test and the torsional stiffness test are independent of each other and do not interfere with each other. When the test positioning mechanism drives the tire to be tested to rotate in the forward and backward direction (simulating the rotation of the tire when the car is moving), the tire to be tested can drive the test block 17 and the test sleeve 16 connected thereto to rotate. The test sleeve 16 rotates 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 be tested for the lateral stiffness test, the longitudinal stiffness test and the torsional stiffness test in the forward and backward direction, thereby realizing the stiffness test of the tire to be tested in a dynamic state, improving the reliability of the stiffness test of the tire to be tested, and solving the technical problem that the stiffness test is carried out in a static state of the tire, and the stiffness test in a dynamic state of the tire is not disclosed, and the reliability of the test result is poor.

[0028] Example 2

[0029] On the basis of Example 1, Figure 1-Figure 3 As shown, the connection mechanism includes a sliding groove 2 arranged at the upper end of the base 1, a threaded rod 20 is rotatably arranged in the sliding groove 2, the threaded rod 20 is fixedly connected to a motor 21, the motor 21 is fixedly arranged in the base 1, threaded blocks 3 are symmetrically arranged 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 the fixed blocks 4, 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;

[0030] The driving mechanism includes a motor 27, which is fixedly arranged at the upper end of the support platform 6, and the motor 27 is fixedly connected to the cylindrical section of the threaded rod 29, and the cylindrical section of the threaded rod 29 passes through the upper end of the support platform 6 and enters the sliding groove 28 and is fixedly connected to the threaded section of the threaded rod 29, and the threaded section of the threaded rod 29 is threadedly connected to the mounting block 11, and a laser rangefinder 2 is installed at the upper end of the sliding groove 28, and the laser rangefinder 2 is used to detect the distance between the upper end of the sliding groove 28 and the upper end of the mounting block 11;

[0031] The test positioning mechanism includes a motor 3 10, which is fixedly arranged on the upper end of the mounting block 11 away from the side of the threaded rod 2 9, and the motor 3 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.

[0032] The beneficial effects of the above technical solution are:

[0033] When the connecting mechanism drives the test bench 5 to move left and right, the control motor 21 works, 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, 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, and the detection change value of the laser rangefinder 1 is the moving distance of the test bench 5 along the left and right direction, that is, the lateral deformation value of the tire to be tested, and the lateral stiffness of the tire to be tested can be obtained by the lateral force applied by the test block 17 to the tire to be tested and the detection change value of the laser rangefinder 1;

[0034] 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, and then the laser rangefinder 2 is turned on. 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 moving distance of the mounting block 11 along the up and down direction, which is the longitudinal deformation value of the tire to be tested. The longitudinal stiffness of the tire to be tested can be obtained by 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. The laser rangefinder 1 and the laser rangefinder 2 are not shown in the drawings of the specification. Figure 1-Figure 3 As shown in;

[0035] After the test block 17 in the test bench 5 contacts the tire to be tested, the angle sensor starts to work, and the motor 3 10 drives the drive shaft 13 to rotate when working, and 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, and 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, and 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, and the torsional stiffness of the tire to be tested can be obtained according to the torque applied to the tire to be tested and the torsional angle of the tire to be tested;

[0036] 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.

[0037] Example 3

[0038] 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, and the rotating shaft 1 22 penetrates 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, and 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;

[0039] A plurality of cavities 32 are evenly arranged 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 a sliding block 35. The sliding block 35 is fixedly connected to a positioning block 36. One 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. The spring 37 is sleeved on the sliding block 35.

[0040] A passage 26 is provided inside the rotating shaft 25, and the inlet of the passage 26 is communicated with an air intake pump 38, and the air intake pump 38 is fixedly arranged on the rotating shaft 25. The side end of the passage 26 is circumferentially connected with a plurality of through holes 27, and the plurality of through holes 27 are communicated with a plurality of cavities 32 in a one-to-one correspondence. The end of the passage 26 away from the inlet is communicated with a horizontal section of a bellows 29, and the horizontal section of the bellows 29 is fixedly connected with an end of the rotating shaft 25 away from the six-point sensor 24. A valve 28 is installed on the horizontal section of the bellows 29, and the vertical section of the bellows 29 is fixedly connected with a blow hood 31, and the vertical section of the bellows 29 is communicated with the blow hood 31, and the blow hood 31 is arranged at an end of the vertical section of the bellows 29 away from the horizontal section of the bellows 29;

[0041] 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 the sliding block 35 arranged corresponding to the test block 17 .

[0042] The beneficial effects of the above technical solution are:

[0043] When the test positioning mechanism is connected to the tire to be tested, the tire to be tested is firstly put on the positioning block 36 on the rotating disk 2 34. The tire to be tested can be set in an upright state or tilted in the left and right directions. The air intake pump 38 is controlled to work. The air intake pump 38 sends gas into the passage 26. The gas enters the cavity 32 through the through hole 27, pushing the sealing block 33 in the cavity 32 to slide in the direction away from the 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 plurality of positioning blocks 36 arranged circumferentially squeeze and fix the inner ring of the tire to be tested, thereby 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, 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, so that the positioning block 36 can fix the tires to be tested with different inner diameters. First, the motor 1 21 is controlled to work so that the rotating disk 2 34 extends into the through hole 18, and then the motor 2 7 is controlled to work so that the tire to be tested contacts the test block 17;

[0044] When the motor 4 19 is working, 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 of the tire to be tested;

[0045] When the sliding block 35 moves, the connecting block 30 is driven 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 of 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 the air pressure in the cavity 32, the second through hole 27 and the passage 26 is kept 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 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, so as to cool down the tire to be tested and avoid the influence of excessive temperature on the stiffness test result of the tire to be tested.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

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 through hole 1 (18), the side wall of the through hole 1 (18) being fixedly provided with a test block (17), 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); 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; The test positioning mechanism also includes a motor four (19), the motor four (19) 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) penetrates 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); A plurality of cavities (32) are evenly arranged 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); 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).

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 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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