A device and method for detecting fatigue resistance of automobile tires under different tire pressures

Abstract

The present invention discloses a fatigue resistance detection device for automobile tires under different tire pressures and a detection method thereof, comprising a detection platform and a tire body, the front and rear sides of the detection platform are penetrated by mounting seats, and the lower side of the mounting seat is connected to the detection platform through a compression spring, the interior of the mounting seat is penetrated by a mounting plate, and the internal bearing of the mounting plate is connected to a moving screw, the left end of the moving screw is connected to the output end of a servo motor, and the outer side of the moving screw is threadedly connected to a connecting frame, the upper end of the connecting frame is installed with an adjustment plate, and the outer key of the rotating shaft is connected to a gear. The fatigue resistance detection device for automobile tires under different tire pressures and a detection method thereof drive the rotating rod to rotate, move the position of the moving frame, control the distance between the moving frames, thereby using the moving frame to push the adjustment plate to move, adjust the distance between the locking plates, and quickly lock and subsequently unlock the tire body.

Description

Technical Field

[0001] The invention relates to the technical field of automobile tire detection, in particular to a device and a method for detecting fatigue resistance of automobile tires under different tire pressures. Background Art

[0002] Automobile tires are one of the important components of automobiles and are the main auxiliary parts for the smooth running of automobiles. Automobile tires are in direct contact with the road surface and support the automobile structure. The production of automobile tires requires high quality to ensure the safe use of the automobile. The fatigue resistance of automobile tires is one of the main factors in the service life of tires and one of the factors to reduce automobile accidents. Tires with low fatigue resistance will reduce the adhesion and anti-skid performance of the car when it is running, and are prone to tire wear and blowout. Therefore, it is necessary to test the fatigue resistance of automobile tires.

[0003] The four-station road vehicle wheel radial fatigue test device with publication number CN206862645U adopts four test stations, improves equipment utilization, increases test operation efficiency, adopts a vertical drum, reduces the volume and floor space of the test device, and is more convenient for wheel and tire assembly installation and disassembly. A servo motor is used as the power source of the drum and the wheel and tire assembly support and loading device, which can make the speed and load control easier and more accurate. The wheel and tire assembly support loading device adopts a slide rail and a slider structure with high execution accuracy. A force sensor is installed on the loaded slider mechanism, and the axial direction of the sensor is consistent with the radial direction of the drum to ensure the accuracy of force transmission. However, when the car is running, the tire pressure borne by the tire is different due to different loads. The tire pressure of the car cannot be adjusted during the detection process. The tire detection data is relatively single, and the influence of the tire pressure on the tire fatigue resistance cannot be compared. The tire cannot be quickly locked and unloaded later, and the tire cannot be quickly tested in batches. The energy-saving performance of the device for testing the tire is low.

[0004] Therefore, we propose a vehicle tire fatigue resistance detection device and a detection method under different tire pressures in order to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a vehicle tire fatigue resistance detection device and a detection method under different tire pressures, so as to solve the problems raised in the above background technology that the vehicle tire fatigue resistance detection device currently on the market cannot adjust the tire pressure of the vehicle during the detection process, cannot quickly lock and unload the tire at a later time, and the energy-saving performance of the tire detection device is low.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for detecting fatigue resistance of automobile tires under different tire pressures, comprising a detection platform and a tire body, the front and rear sides of the detection platform are penetrated by mounting seats, and the lower side of the mounting seat is connected to the detection platform through a compression spring, the interior of the mounting seat is penetrated by a mounting plate, and the internal bearing of the mounting plate is connected to a moving screw, the left end of the moving screw is connected to the output end of the servo motor, and the outer side of the moving screw is threadedly connected to a connecting frame, the upper end of the connecting frame is installed with an adjustment plate, and the inner side bearing of the adjustment plate is connected to a rotating shaft, the outer side key of the rotating shaft is connected to a gear, and the end of the rotating shaft is installed with a locking plate, The tire body is located on the inner side of the locking plate, and a slider is welded on the upper side of the adjusting plate, and the slider passes through the lower side of the mounting frame, the internal bearing of the mounting frame is connected with a rotating rod, the end key of the rotating rod is connected with a bevel gear group, and the internal key of the bevel gear group is connected with an adjusting screw, the outer side of the adjusting screw is threadedly connected with a moving frame, a tooth block is installed on the upper side of the mounting plate, an extension seat is welded on the upper side of the mounting frame, and the middle bearing of the extension seat is connected with an active rotating rod, the outer belt of the active rotating rod is connected with a driven rotating rod, a convex rod is installed on the outer side of the right end of the driven rotating rod, and a ball bearing is movably connected to the end of the convex rod, and a sliding groove is provided on the upper wall on the inner side of the detection platform.

[0007] Preferably, the mounting plate and the mounting seat form a front-rear sliding structure, the main section of the mounting seat is a "U"-shaped structure, and the mounting seat and the detection platform form an up-and-down sliding structure.

[0008] Preferably, the side view of the connecting frame is an inverted "L"-shaped structure, the connecting frame and the mounting plate are slidably connected, and the width of the lower end of the connecting frame is greater than the width of the upper end of the connecting frame.

[0009] Preferably, the adjustment plate is symmetrically arranged about the longitudinal center line of the mounting frame, and the adjustment plate is slidably connected to the mounting frame through a slider whose main section is a "T"-shaped structure, and the side section of the mounting frame is an inverted "U"-shaped structure. At the same time, the highest point of the adjustment plate is higher than the lowest point of the movable frame, and the side section of the movable frame is a "C"-shaped structure.

[0010] Preferably, the tooth blocks are distributed at equal intervals at the connection between the mounting plate and the gear, and the gear and the locking plate are coaxially connected.

[0011] Preferably, the side view of the extension seat is a "cross" shaped structure, and the highest point of the extension seat is lower than the lowest point on the upper wall of the inner side of the detection platform, and the connecting end of the detection platform and the slide groove is distributed in an inclined shape, and the inner side of the slide groove is smooth.

[0012] Preferably, the active rotary rod includes a spring column, a fixed plate and a limit rod, and the right end of the active rotary rod is connected to the fixed plate through the spring column, and a limit rod is installed on the left side of the fixed plate. At the same time, the outer diameter of the active rotary rod is the same as the outer diameter of the driven rotary rod, and convex rods are distributed at equal angles on the outside of the driven rotary rod, and the lengths of the convex rods increase in sequence in a counterclockwise direction.

[0013] Preferably, the fixing plate forms an elastic structure through a spring column and an active rotating rod, and the limiting rods symmetrically arranged on the fixing plate are snap-fittedly connected to the extension seat.

[0014] Another technical solution provided by the present invention is to provide a method for detecting fatigue resistance of automobile tires under different tire pressures, comprising the following steps:

[0015] S1: Place the entire device stably in the working area, with the tire body placed at the bottom of the inner side of the testing platform and between the locking plates;

[0016] S2: Rotate the rotating rod to control the movement of the moving frame, adjust the distance between the moving frames, use the moving frame to push the adjustment plate to move, shorten the distance between the two adjustment plates, thereby shortening the distance between the two locking plates, and use the locking plate to lock the tire body;

[0017] S3: The servo motor is powered on to control the forward and reverse rotation of the servo motor, thereby controlling the reciprocating forward and reverse rotation of the moving lead screw, and then controlling the left and right reciprocating movement of the connecting frame, driving the adjustment plate to move synchronously, controlling the movement of the tire body, and utilizing the meshing connection of the gear and the tooth block to drive the coaxially connected locking plate to rotate, thereby controlling the rotation of the tire body and testing the fatigue resistance of the tire body;

[0018] S4: Pull the fixing plate to release the engagement between the limit rod and the extension seat, rotate the active rotary rod and drive the driven rotary rod connected by the belt to rotate, and change the position of the convex rods of different lengths facing the slide groove. When the tire body is driven to run, the convex rods of different lengths can be used to adjust the pressure of the tire body by the detection platform, adjust the tire pressure of the tire body, and thus detect the fatigue resistance of the tire body under different tire pressures;

[0019] S5: After the detection is completed, just rotate the rotating rod in the opposite direction to control the moving frame to move in the opposite direction, increase the distance between the moving frames, release the push on the adjustment plate, and thus release the lock of the locking plate on the tire body, so that the tire body can be taken out and the subsequent tire locking and detection can be continued.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the vehicle tire fatigue resistance detection device and detection method under different tire pressures;

[0021] 1. The driving rod rotates, and with the use of the bevel gear group, the two symmetrically arranged groups of adjusting screws can be rotated in opposite directions, the position of the mobile frame can be moved, and the distance between the mobile frames can be controlled. The mobile frame can be used to push the adjustment plate to move, and then the locking plate can be pushed to move, and the distance between the locking plates can be adjusted. The tire body can be quickly locked and subsequently unlocked. The whole process can be achieved with only one rotation force. The operation is simple and convenient, and tire samples can be quickly tested in batches.

[0022] 2. The adjustable limit structure composed of a fixed plate, a spring column and a limit rod is used to quickly limit the angle position of the active rotary rod after the active rotary rod is rotated to the required angle position, and the driven rotary rod is rotated by the active rotary rod to exchange the positions of the convex rods of different lengths, and the convex rods of different lengths are placed directly opposite to the position of the slideway. The tire pressure of the tire body is adjusted by using the relative position change between the convex rods of different lengths and the detection platform, so as to detect the fatigue resistance of the tire body under different tire pressures, increase the diversity of the detection data, and detect the tire performance more accurately;

[0023] 3. When the entire device locks the tire body, the gears and the tooth blocks are always meshed and connected with each other. Therefore, when the tire body is moved, the gears can rotate by themselves and drive the locking plate to rotate, thereby realizing the self-rotation of the tire body, simulating the working state of the tire body, and more closely detecting the tire body. There is no need to use a separate driving energy source. The entire device has strong linkage, and the driving force is achieved in conjunction with the operation of the entire device, with high energy-saving performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 3 It is a schematic diagram of the side section structure of the present invention;

[0027] Figure 4 For the present invention Figure 3 The enlarged structural diagram at B in FIG.

[0028] Figure 5 It is a schematic diagram of the side cross-section structure of the mobile frame of the present invention;

[0029] Figure 6 It is a schematic diagram of the top-sectional structure of the mobile frame of the present invention;

[0030] Figure 7 It is a schematic diagram of the top-sectional structure of the extension seat of the present invention;

[0031] Figure 8This is a schematic diagram of the cross-sectional structure of the active rotary rod of the present invention;

[0032] Fig. 9 This is a schematic diagram of the main cross-sectional structure of the mounting plate of the present invention;

[0033] Fig.10 This is a schematic diagram of the main cross-sectional structure of the mounting seat of the present invention;

[0034] Fig.11 For the present invention Fig.10 The enlarged structural diagram at C in the figure.

[0035] In the figure: 1. detection platform; 2. mounting seat; 3. compression spring; 4. mounting plate; 5. moving screw; 6. servo motor; 7. connecting frame; 8. adjustment plate; 9. rotating shaft; 10. locking plate; 11. tire body; 12. slider; 13. mounting frame; 14. rotating rod; 15. bevel gear set; 16. adjusting screw; 17. moving frame; 18. gear; 19. gear block; 20. extension seat; 21. active rotating rod; 2101, spring column; 2102, fixing plate; 2103, limiting rod; 22. driven rotating rod; 23. convex rod; 24. ball; 25. slide groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-11The present invention provides a technical solution: a fatigue resistance detection device for automobile tires under different tire pressures, comprising a detection platform 1, a mounting seat 2, a compression spring 3, a mounting plate 4, a moving screw 5, a servo motor 6, a connecting frame 7, an adjustment plate 8, a rotating shaft 9, a locking plate 10, a tire body 11, a slider 12, a mounting frame 13, a rotating rod 14, a bevel gear set 15, an adjusting screw 16, a moving frame 17, a gear 18, a gear block 19, an extension seat 20, an active rotating rod 21, and a spring column 21 01, fixed plate 2102, limit rod 2103, driven rotary rod 22, convex rod 23, ball 24 and slide groove 25, the front and rear sides of the detection platform 1 are penetrated by mounting seats 2, and the lower side of the mounting seat 2 is connected to the detection platform 1 through a compression spring 3, the interior of the mounting seat 2 is penetrated by a mounting plate 4, and the internal bearing of the mounting plate 4 is connected to a moving screw rod 5, the left end of the moving screw rod 5 is connected to the output end of the servo motor 6, and the outer side of the moving screw rod 5 is threadedly connected to a connecting frame 7, and the connecting An adjusting plate 8 is installed at the upper end of the receiving frame 7, and the inner bearing of the adjusting plate 8 is connected to a rotating shaft 9, the outer key of the rotating shaft 9 is connected to a gear 18, and a locking plate 10 is installed at the end of the rotating shaft 9, the tire body 11 is located on the inner side of the locking plate 10, the upper side of the adjusting plate 8 is welded with a slider 12, and the slider 12 passes through the lower side of the mounting frame 13, the internal bearing of the mounting frame 13 is connected to a rotating rod 14, the end of the rotating rod 14 is keyed to a bevel gear set 15, and the internal key of the bevel gear set 15 is connected to the bevel gear set 15. An adjusting screw rod 16 is connected, the outer side of the adjusting screw rod 16 is threadedly connected to a moving frame 17, a tooth block 19 is installed on the upper side of the mounting plate 4, an extension seat 20 is welded to the upper side of the mounting frame 13, and an active rotary rod 21 is connected to the middle bearing of the extension seat 20, and the outer side belt of the active rotary rod 21 is connected to a driven rotary rod 22, a convex rod 23 is installed on the outer side of the right end of the driven rotary rod 22, and a ball 24 is movably connected to the end of the convex rod 23, and a slide groove 25 is opened on the upper wall on the inner side of the detection platform 1.

[0038] In this example, the mounting plate 4 and the mounting seat 2 form a front-to-back sliding structure, and the main section of the mounting seat 2 is a "U"-shaped structure, and the mounting seat 2 and the detection platform 1 form an up-and-down sliding structure. This design can ensure that the structure composed of the mounting plate 4 and the mounting seat 2 smoothly follows the movement of the structure composed of the connecting frame 7 and the adjusting plate 8, and smoothly locks and presses down the tire body 11;

[0039] The side view of the connecting frame 7 is an inverted "L" shaped structure, and the connecting frame 7 is slidably connected to the mounting plate 4, and the width of the lower end of the connecting frame 7 is greater than the width of the upper end of the connecting frame 7. This design allows the connecting frame 7 to slide smoothly on the mounting plate 4 when the tire body 11 is running, ensuring that the mounting plate 4 and the connecting frame 7 are connected to each other without causing the tire body 11 to get stuck during operation;

[0040] The adjusting plate 8 is symmetrically arranged about the longitudinal center line of the mounting frame 13, and the adjusting plate 8 is slidably connected to the mounting frame 13 through a slider 12 with a main section of a "T"-shaped structure, and the side section of the mounting frame 13 is an inverted "U"-shaped structure, and the highest point of the adjusting plate 8 is higher than the lowest point of the moving frame 17, and the side section of the moving frame 17 is a "C"-shaped structure. This design can ensure that the adjusting plate 8 moves smoothly and will not be disconnected from the mounting frame 13, and can smoothly control the movement of the moving frame 17, and push the adjusting plate 8 to adjust the position of the adjusting plate 8;

[0041] The tooth blocks 19 are evenly spaced at the connection between the mounting plate 4 and the gear 18, and the gear 18 and the locking plate 10 are coaxially connected. This design can realize the linkage between the gear 18 and the locking plate 10, and the locked tire body 11 can be controlled to simulate rotation by the rotation of the locking plate 10;

[0042] The side view of the extension seat 20 is a "cross" structure, and the highest point of the extension seat 20 is lower than the lowest point of the upper wall of the inner side of the detection platform 1, and the connecting end of the detection platform 1 and the slide groove 25 is distributed in an inclined shape, and the inner side of the slide groove 25 is smooth. This design can reduce the friction between the slide groove 25 and the protruding rod 23, and make the protruding rod 23 slide smoothly into the slide groove 25;

[0043] The active rotary rod 21 includes a spring column 2101, a fixed plate 2102 and a limit rod 2103, and the right end of the active rotary rod 21 is connected to the fixed plate 2102 through the spring column 2101, and the limit rod 2103 is installed on the left side of the fixed plate 2102. At the same time, the outer diameter of the active rotary rod 21 is the same as the outer diameter of the driven rotary rod 22, and the outer side of the driven rotary rod 22 is distributed with convex rods 23 at equal angles, and the length of the convex rods 23 increases in turn in the counterclockwise direction. This design can realize the linkage between the active rotary rod 21 and the driven rotary rod 22, thereby controlling the rotation of the driven rotary rod 22, driving the convex rod 23 to rotate, and exchanging the angular positions of the convex rods 23 of different lengths;

[0044] The fixed plate 2102 forms an elastic structure with the active rotating rod 21 through the spring column 2101, and the limiting rod 2103 symmetrically arranged on the fixed plate 2102 is snap-connected with the extension seat 20. This design can flexibly move the fixed plate 2102 and the limiting rod 2103 to achieve locking and subsequent unlocking of the rotation of the active rotating rod 21.

[0045] In order to better demonstrate the specific detection method of the automobile tire fatigue resistance detection device under different tire pressures, in this embodiment, a detection method of the automobile tire fatigue resistance detection device under different tire pressures includes the following steps:

[0046] S1: Place the entire device stably in the working area, and place the tire body 11 at the bottom of the inner side of the detection platform 1 and between the locking plates 10;

[0047] S2: Rotate the rotating rod 14 to control the movement of the moving frame 17, adjust the distance between the moving frames 17, use the moving frame 17 to push the adjustment plate 8 to move, shorten the distance between the two adjustment plates 8, thereby shortening the distance between the two locking plates 10, and use the locking plate 10 to lock the tire body 11;

[0048] S3: The servo motor 6 is powered on to control the forward and reverse rotation of the servo motor 6, thereby controlling the moving screw rod 5 to rotate forward and reverse, and then controlling the connecting frame 7 to move back and forth, driving the adjustment plate 8 to move synchronously, controlling the tire body 11 to move, and utilizing the meshing connection between the gear 18 and the tooth block 19 to drive the coaxially connected locking plate 10 to rotate, thereby controlling the rotation of the tire body 11, and testing the fatigue resistance of the tire body 11;

[0049] S4: Pull the fixing plate 2102 to release the engagement between the limit rod 2103 and the extension seat 20, rotate the active rotary rod 21 and drive the driven rotary rod 22 connected by the belt to rotate, and change the position of the convex rods 23 of different lengths facing the slide groove 25. When the tire body 11 is driven to run, the convex rods 23 of different lengths can be used to adjust the pressure of the tire body 11 by the detection platform 1, adjust the tire pressure of the tire body 11, and thus detect the fatigue resistance of the tire body 11 under different tire pressures;

[0050] S5: After the detection is completed, it is only necessary to rotate the rotating rod 14 in the opposite direction to control the moving frame 17 to move in the opposite direction, increase the distance between the moving frames 17, release the push on the adjustment plate 8, and thus release the lock of the locking plate 10 on the tire body 11, so that the tire body 11 can be taken out and the subsequent tire locking and detection can be continued.

[0051] Working principle of this embodiment: When using the automobile tire fatigue resistance detection device and detection method under different tire pressures, first, the user first Figure 1 The entire device shown is placed stably in the working area, and the tire body 11 is placed at the bottom of the inner side of the detection platform 1 and is located Figure 3 The locking plates 10 shown are combined Figure 5-6 As shown, the rotating rod 14 is rotated, and the rotating rod 14 controls the bevel gear group 15 to rotate, and the bevel gear group 15 controls the adjusting screw rod 16 to rotate. Due to the transmission of the bevel gear group 15, the two groups of adjusting screw rods 16 can be rotated in the opposite direction at the same time. The adjusting screw rod 16 controls the movable frame 17 connected with the outer thread to move synchronously in the opposite direction, and the distance between the movable frames 17 is adjusted. The distance between the movable frames 17 is shortened, and the movable frame 17 can be used to push the adjusting plate 8 to move. Figure 2 and Figure 4As shown, the slider 12 installed on the adjustment plate 8 slides on the mounting frame 13, shortening the distance between the two adjustment plates 8, thereby shortening the distance between the two locking plates 10, and the tire body 11 is locked by the locking plate 10. When the adjustment plate 8 moves, the connecting frame 7 can be pulled to move, and the connecting frame 7 pulls the slidingly connected mounting plate 4 to move, ensuring that the gear 18 and the tooth block 19 are meshed and connected with each other. Fig. 9 The servo motor 6 shown is powered on, and the servo motor 6 is controlled to rotate forward, so that the servo motor 6 can control the movable screw rod 5 to rotate, and the movable screw rod 5 controls the connecting frame 7 connected with the outer thread to move to the left, and the connecting frame 7 controls the adjustment plate 8 to move synchronously, thereby controlling the tire body 11 to move. Since the gear 18 and the tooth block 19 are meshed and connected, the gear 18 can be controlled to rotate, thereby controlling the coaxially connected locking plate 10 to rotate, and then controlling the tire body 11 to rotate, driving the tire body 11 to run. When the tire body 11 runs to the leftmost end of the detection platform 1, the servo motor 6 can be controlled to reverse, and the servo motor 6 controls the movable screw rod 5 to reverse, thereby controlling the connecting frame 7 to move to the right. According to the above steps, the tire body 11 can be realized to run to the right, and the staff uses the flaw detection device to collect data on the tire body 11;

[0052] Combination Figure 3 and Figure 7-8 As shown, the fixing plate 2102 is pulled, and the spring column 2101 is pulled to release the engagement between the limit rod 2103 and the extension seat 20, and the active rotary rod 21 is rotated 90° at a time, so as to control the active rotary rod 21 to drive the driven rotary rod 22 connected with the belt to rotate 90°, and the position of the convex rods 23 of different lengths facing the slide groove 25 is changed, and the pulling of the fixing plate 2102 is released. The spring column 2101 controls the fixing plate 2102 to reset and move, thereby controlling the limit rod 2103 to reset and move, and the limit rod 2103 is engaged with the extension seat 20 to limit the position of the convex rod 23. When the tire body 11 is driven to run, the convex rods 23 of different lengths can be used to adjust the pressure of the tire body 11 by the detection platform 1, and the tire pressure of the tire body 11 is adjusted, so as to detect the fatigue resistance of the tire body 11 under different tire pressures;

[0053] After the test is completed, it is only necessary to rotate the rotating rod 14 in the opposite direction to control the adjustment screw 16 to reverse, thereby controlling the movable frame 17 to move in the opposite direction, increasing the distance between the movable frames 17, releasing the push on the adjustment plate 8, thereby releasing the lock of the locking plate 10 on the tire body 11, and then the tire body 11 can be taken out and the remaining sample tires can be tested. The above is the working process of the entire device. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0054] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for testing the fatigue resistance of automobile tires under different tire pressures, comprising a testing platform (1) and a tire body (11), characterized in that: The front and rear sides of the detection platform (1) are penetrated by a mounting seat (2), and the lower side of the mounting seat (2) is connected to the detection platform (1) via a compression spring (3). The interior of the mounting seat (2) is penetrated by a mounting plate (4), and the mounting plate (4) and the mounting seat (2) form a front-to-back sliding structure, and the main cross-section of the mounting seat (2) is a "U"-shaped structure, and the mounting seat (2) and the detection platform (1) form an up-and-down sliding structure, and the internal bearing of the mounting plate (4) is connected to a moving screw rod (5), and the left end of the moving screw rod (5) is connected to the output end of the servo motor (6), and the moving screw rod (5) ) is threadedly connected to a connecting frame (7), the side view of the connecting frame (7) is an inverted "L"-shaped structure, the connecting frame (7) is slidably connected to the mounting plate (4), and the width of the lower end of the connecting frame (7) is greater than the width of the upper end of the connecting frame (7), the upper end of the connecting frame (7) is mounted with an adjustment plate (8), the inner side bearing of the adjustment plate (8) is connected to a rotating shaft (9), the outer side key of the rotating shaft (9) is connected to a gear (18), and the end of the rotating shaft (9) is mounted with a locking plate (10), the tire body (11) is located on the inner side of the locking plate (10), and the upper side welding of the adjustment plate (8) is The mounting plate (4) is connected to a slider (12), and the slider (12) passes through the lower side of the mounting frame (13); the internal bearing of the mounting frame (13) is connected to a rotating rod (14); the end of the rotating rod (14) is key-connected to a bevel gear group (15), and the internal key of the bevel gear group (15) is key-connected to an adjusting screw rod (16); the outer side of the adjusting screw rod (16) is threadedly connected to a moving frame (17); a tooth block (19) is installed on the upper side of the mounting plate (4); the tooth blocks (19) are evenly spaced at the connection between the mounting plate (4) and the gear (18), and the gear (18) and the locking plate (10) are coaxially connected. The gear (18) and the locking plate (10) are connected to each other so as to realize linkage between the gear (18) and the locking plate (10), and the locked tire body (11) is controlled to simulate rotation by the rotation of the locking plate (10). An extension seat (20) is welded to the upper side of the mounting frame (13), and a central bearing of the extension seat (20) is connected to an active rotary rod (21). The outer belt of the active rotary rod (21) is connected to a driven rotary rod (22). A convex rod (23) is installed on the outer side of the right end of the driven rotary rod (22), and a ball (24) is movably connected to the end of the convex rod (23). A slide groove (25) is provided on the upper wall inside the detection platform (1).

2. The device for detecting fatigue resistance of automobile tires under different tire pressures according to claim 1, characterized in that: The adjustment plate (8) is symmetrically arranged about the longitudinal center line of the mounting frame (13), and the adjustment plate (8) is slidably connected to the mounting frame (13) via a slider (12) having a main cross-section of a "T"-shaped structure, and the side cross-section of the mounting frame (13) is an inverted "U"-shaped structure, while the highest point of the adjustment plate (8) is higher than the lowest point of the moving frame (17), and the side cross-section of the moving frame (17) is a "C"-shaped structure.

3. The device for detecting fatigue resistance of automobile tires under different tire pressures according to claim 1, characterized in that: The side view of the extension seat (20) is a "cross" shaped structure, and the highest point of the extension seat (20) is lower than the lowest point of the upper wall of the inner side of the detection platform (1), and the connecting end of the detection platform (1) and the slide groove (25) is distributed in an inclined shape, and the inner side of the slide groove (25) is smooth.

4. The device for detecting fatigue resistance of automobile tires under different tire pressures according to claim 1, characterized in that: The active rotary rod (21) comprises a spring column (2101), a fixed plate (2102) and a limit rod (2103), and the right end of the active rotary rod (21) is connected to the fixed plate (2102) via the spring column (2101), and the limit rod (2103) is installed on the left side of the fixed plate (2102), and the outer diameter of the active rotary rod (21) is the same as the outer diameter of the driven rotary rod (22), and the outer side of the driven rotary rod (22) is provided with convex rods (23) at equal angles, and the lengths of the convex rods (23) increase in sequence in a counterclockwise direction.

5. The device for detecting fatigue resistance of automobile tires under different tire pressures according to claim 4, characterized in that: The fixing plate (2102) forms an elastic structure through the spring column (2101) and the active rotating rod (21), and the limiting rods (2103) symmetrically arranged on the fixing plate (2102) are snap-fittedly connected to the extension seat (20).

6. A method for detecting the fatigue resistance of automobile tires under different tire pressures as claimed in claim 1, characterized in that: The steps include: S1: The entire device is stably placed in the working area, and the tire body (11) is placed at the bottom of the inner side of the detection platform (1) and located between the locking plates (10); S2: rotating the rotating rod (14) to control the movement of the movable frame (17), adjusting the distance between the movable frames (17), using the movable frame (17) to push the adjustment plate (8) to move, shortening the distance between the two adjustment plates (8), thereby shortening the distance between the two locking plates (10), and using the locking plate (10) to lock the tire body (11); S3: The servo motor (6) is powered on to control the forward and reverse rotation of the servo motor (6), thereby controlling the moving screw rod (5) to rotate forward and reverse, thereby controlling the connecting frame (7) to move back and forth, driving the adjustment plate (8) to move synchronously, controlling the movement of the tire body (11), and utilizing the meshing connection between the gear (18) and the tooth block (19) to drive the coaxially connected locking plate (10) to rotate, thereby controlling the rotation of the tire body (11), and testing the fatigue resistance of the tire body (11); S4: Pull the fixing plate (2102) to release the engagement between the limit rod (2103) and the extension seat (20), rotate the active rotary rod (21) and drive the driven rotary rod (22) connected to the belt to rotate, and replace the position of the convex rods (23) of different lengths facing the slide groove (25). When the tire body (11) is driven to run, the convex rods (23) of different lengths can be used to adjust the pressure of the tire body (11) by the detection platform (1), adjust the tire pressure of the tire body (11), and thus detect the fatigue resistance of the tire body (11) under different tire pressures; S5: After the detection is completed, the rotating rod (14) is rotated in the opposite direction to control the moving frame (17) to move in the opposite direction, thereby increasing the distance between the moving frames (17) and releasing the push on the adjustment plate (8), thereby releasing the lock of the locking plate (10) on the tire body (11), and the tire body (11) can be taken out, and the subsequent tire locking and detection can be continued.

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