A static friction coefficient test device and method for rubber tire production

Abstract

The invention relates to the technical field of static friction testing, and discloses a static friction coefficient testing device and method for rubber tire production, comprising a test bench, wherein the middle part of the test bench is rotatably connected to a rotating plate, and the middle part of the rotating plate is clamped with a mounting block; a fixed box is fixedly installed on the left side of the bottom end of the test bench, and the inner cavity of the fixed box is slidably connected to a lifting plate, and the left end of the test bench is slidably connected to a pressure rod, and the bottom end of the pressure rod is fixedly installed with a connecting rod. The invention arranges a lifting plate that can move up and down in the fixed box. After the test block completes the test, the plug-in block is pulled out to make the rotating plate rotate in the opposite direction, and the lifting plate is pressed down by the pressure rod, so that water under the lifting plate is squeezed into the vertical pipe and sprayed on the cement mounting block and the asphalt mounting block through the vertical pipe, thereby simulating the condition of a slippery road surface. At this time, another test can be performed to obtain the static friction coefficient of the produced rubber tire under the condition of a slippery road surface.

Description

Technical Field

[0001] The present invention relates to the technical field of static friction testing, and more specifically to a static friction coefficient testing device and method for rubber tire production. Background Art

[0002] The static friction coefficient is an important parameter of the material. During the production process of rubber tires, different types of rubber tires need to be tested to obtain the static friction coefficient of the rubber tires, so as to make improvements or make different applications.

[0003] The Chinese invention patent with application number CN202311413536.1 discloses a friction coefficient testing device, in which a flipping mechanism, a horizontal mechanism, a lifting mechanism, a main body and a control unit are provided, and the static friction coefficient of the above-mentioned wheel under test is calculated according to the height information measured by the above-mentioned lifting mechanism. Through the above-mentioned friction coefficient testing device, the static friction coefficient between the tire end face of the aircraft and the cabin doors of different materials can be automatically tested in a simple manner, but in actual use, it is found that although the above-mentioned application can measure the static friction coefficient, the actual environment of the rubber tire has the situation of slippery road surface in rainy weather, and the above-mentioned application cannot derive the static friction coefficient in the case of slippery road surface, which has limitations. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a static friction coefficient test device and method for rubber tire production, which has the advantage of being able to simulate slippery road conditions to obtain an accurate static friction coefficient.

[0005] To achieve the above object, the present invention provides the following technical solution: A static friction coefficient test device for rubber tire production, comprising a test bench, a rotating plate is rotatably connected to the middle of the test bench, and a mounting block is clamped to the middle of the rotating plate;

[0006] A fixing box is fixedly installed on the left side of the bottom end of the test bench, and a lifting plate is slidably connected to the inner cavity of the fixing box. A pressure rod is slidably connected to the left end of the test bench, and a connecting rod is fixedly installed on the bottom end of the pressure rod. A telescopic shaft and a return spring are fixedly installed on the bottom end of the pressure rod, and a spring 1 is fixedly installed on the bottom end of the lifting plate. A connecting pipe 1 is fixedly installed on the bottom end of the fixing box, and a vertical pipe is fixedly installed on the front end of the connecting pipe 1.

[0007] A driving motor is fixedly installed on the right side of the test bench, an output end of the driving motor is fixedly sleeved with an incomplete gear, and a front end of the rotating plate is fixedly sleeved with a transmission gear.

[0008] As a preferred technical solution of the present invention, a connecting tube 2 is fixedly installed on the top of the front end of the fixed box, and the insides of the connecting tube 2 and the connecting tube 1 are both slidably connected with a blocking shaft, a connecting frame is fixedly installed on the front side of the vertical tube, and the middle part of the connecting frame is rotatably connected with a rotating telescopic rod, and push-pull frames are fixedly installed on the upper and lower ends of the rotating telescopic rod, magnetic blocks are fixedly installed on the front ends of the connecting tube 1 and the connecting tube 2, and a spring 2 is fixedly installed on the top of the lifting plate.

[0009] As a preferred technical solution of the present invention, a ratchet is fixedly installed on the front end of the rotating plate, a plug-in block is placed on the top of the test bench, a limit frame is fixedly installed on the bottom end of the plug-in block, the right end of the limit frame is rotatably connected with a baffle, and a reverse tension spring is fixedly installed between the limit frame and the baffle.

[0010] As a preferred technical solution of the present invention, the mounting blocks include cement mounting blocks and asphalt mounting blocks, and the materials of the cement mounting blocks and asphalt mounting blocks are cement and asphalt, respectively.

[0011] As a preferred technical solution of the present invention, the bottom end of the connecting rod is fixedly mounted on the lifting plate, the return spring is sleeved on the telescopic shaft, and the bottom ends of the telescopic shaft and the return spring are both fixedly mounted on the fixing box.

[0012] As a preferred technical solution of the present invention, a water inlet pipe is fixedly installed at the bottom end of the right side of the fixed box, and an air inlet pipe is fixedly installed at the top end of the right side of the fixed box. The water inlet pipe and the air inlet pipe are one-way pipes, and the water inlet pipe is connected to an external water source.

[0013] As a preferred technical solution of the present invention, the magnetic block has magnetism, the push-pull frame is made of iron material, and the diameter value of the rear end of the blocking shaft is equal to the inner diameter value of the connecting pipe 2 and the connecting pipe 1.

[0014] As a preferred technical solution of the present invention, the top end of the vertical pipe is arranged to be inclined downward, the vertical pipe is located on the left side of the mounting block, and a lead block is fixedly mounted on the bottom surface of the rotating plate.

[0015] A static friction coefficient test method for rubber tire production comprises the following steps:

[0016] Firstly, the rubber tire is processed and sliced ​​to obtain a sample block, a cement mounting block and an asphalt mounting block are mounted on a rotating plate respectively, and then the sample block is placed on the cement mounting block and the asphalt mounting block respectively;

[0017] Start the driving motor, which drives the incomplete gear to rotate. The incomplete gear meshes with the transmission gear once every rotation, thereby driving the transmission gear to rotate five degrees, so that the transmission gear is lifted up five degrees. When the rotating plate rotates, it can drive the ratchet to rotate, thereby pushing the baffle to turn right. When the incomplete gear is not meshed with the transmission gear, the left end of the ratchet is stuck on the baffle and cannot rotate in the opposite direction. With the periodic rotation of the incomplete gear, the rotating plate can be intermittently lifted upward gradually. After lifting, the return spring in a compressed state pushes the pressure rod upward. When one of the sample blocks slides off the cement mounting block or the asphalt mounting block, the number of revolutions of the incomplete gear is recorded, and the incomplete gear continues to rotate until the other sample block also slides off. At this time, the static friction coefficient of the rubber tire sample blocks on the cement mounting block and the asphalt mounting block can be calculated.

[0018] Subsequently, the driving motor stops, and the plug-in block is pulled out upward, and the ratchet loses the cover of the baffle. Under the gravity of the lead block on the rotating plate, the rotating plate can be driven to rotate downward in the opposite direction, so that the left end of the rotating plate is pressed on the pressure rod, driving the pressure rod to move downward, and then driving the lifting plate to move downward in the inner cavity of the fixed box, squeezing the water under the connecting rod into the vertical pipe, and spraying it on the cement mounting block and the asphalt mounting block through the vertical pipe, thereby simulating the situation that the road surface is wet and slippery. Subsequently, the sample block is placed on the cement mounting block and the asphalt mounting block again, and the plug-in block is inserted into the test bench. The driving motor is started again to drive the rotating plate to move. When the two sample blocks slide off the cement mounting block and the asphalt mounting block respectively, the static friction coefficient of the rubber tire sample block under the condition of wet and slippery road surface can be obtained.

[0019] After the test is completed, push the top of the rotating telescopic rod backward, so that the blocking shaft in the connecting tube one blocks the connecting tube one, and the blocking shaft in the connecting tube two is pushed out, open the space at the top of the fixed box, then pull out the plug-in block, start the drive motor, and the drive motor can drive the transmission gear to rotate through the incomplete gear when working, so as to lift the rotating plate upward. At this time, the lifting plate and the pressure rod lose pressure, and the telescopic shaft and spring one pull the lifting plate, squeeze the air through the vertical pipe, and spray it on the rotating plate. However, when the teeth on the incomplete gear are separated from the transmission gear, the rotating plate will fall downward in the opposite direction due to the loss of the baffle blocking the ratchet, causing the lifting plate to move downward. As the incomplete gear continues to rotate, the vertical pipe can continuously spray air on the rotating plate, thereby drying the water and achieving the cleaning effect.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention sets a lifting plate that can move up and down in a fixed box. After the test of the sample block is completed, the plug-in block is pulled out to make the rotating plate rotate in the opposite direction. The lifting plate is pressed down by a pressure rod to squeeze the water under the lifting plate into the vertical pipe and spray it on the cement mounting block and the asphalt mounting block through the vertical pipe, thereby simulating the slippery road surface. At this time, a test can be performed once to obtain the static friction coefficient of the produced rubber tire under the slippery road surface.

[0022] 2. The present invention can open the connecting tube 2 and close the connecting tube 1 by pushing the top end of the rotating telescopic rod backward. At this time, during the lifting of the rotating plate, the lifting plate is driven upward by the elastic force of the spring 1 and the spring 2, and then the air is sprayed onto the rotating plate and the mounting block through the vertical pipe. During the downward movement of the rotating plate, the air in the fixed box can be replenished. By continuously lifting and moving the rotating plate downward, the water on the rotating plate can be dried, and due to the presence of water, the top surface of the rotating plate can be cleaned during the drying process.

[0023] 3. The present invention inserts a plug-in block into the test bench to clamp the ratchet with a baffle, so that the ratchet can only rotate clockwise. The incomplete gear is set as an incomplete gear. When the incomplete gear rotates one circle, the rotating plate is lifted up five degrees. The rotating plate can be slowly lifted up, and after being lifted five degrees, this degree can be maintained for a certain time to observe whether the sample block slides down. When the sample block slides down, a precise lifting degree can be obtained, thereby improving the accuracy of the static friction coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 This is a schematic diagram of the explosive connection of the plug-in block structure of the present invention;

[0026] Figure 3 For the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0027] Figure 4 For the present invention Figure 2 The enlarged schematic diagram of point B in the middle;

[0028] Figure 5 It is a cross-sectional schematic diagram of the structural fixing box of the present invention;

[0029] Figure 6 It is a cross-sectional schematic diagram of the vertical pipe of the structure of the present invention;

[0030] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of point C.

[0031] In the figure: 1. test bench; 2. rotating plate; 3. mounting block; 31. cement mounting block; 32. asphalt mounting block; 4. fixing box; 5. lifting plate; 6. pressure rod; 7. connecting rod; 8. spring one; 9. connecting pipe one; 10. vertical pipe; 11. water inlet pipe; 12. incomplete gear; 13. transmission gear; 14. ratchet; 15. plug-in block; 16. limit frame; 17. baffle; 18. anti-pull spring; 19. connecting pipe two; 20. air inlet pipe; 21. connecting frame; 22. rotating telescopic rod; 23. push-pull frame; 24. magnetic block; 25. spring two; 26. telescopic shaft; 27. reset spring; 28. drive motor; 29. ​​blocking shaft. DETAILED DESCRIPTION

[0032] 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.

[0033] Embodiment 1

[0034] like Figures 1 to 4 As shown, the present invention provides a static friction coefficient test device for rubber tire production, comprising a test bench 1, a rotating plate 2 is rotatably connected to the middle of the test bench 1, and a mounting block 3 is clamped to the middle of the rotating plate 2;

[0035] A fixing box 4 is fixedly installed on the left side of the bottom end of the test bench 1, and a lifting plate 5 is slidably connected to the inner cavity of the fixing box 4. A pressure rod 6 is slidably connected to the left end of the test bench 1, and a connecting rod 7 is fixedly installed on the bottom end of the pressure rod 6. A telescopic shaft 26 and a reset spring 27 are fixedly installed on the bottom end of the pressure rod 6. A spring 8 is fixedly installed on the bottom end of the lifting plate 5. A connecting pipe 9 is fixedly installed on the bottom end of the fixing box 4, and a vertical pipe 10 is fixedly installed on the front end of the connecting pipe 9;

[0036] A driving motor 28 is fixedly installed on the right side of the test bench 1, an incomplete gear 12 is fixedly sleeved on the output end of the driving motor 28, and a transmission gear 13 is fixedly sleeved on the front end of the rotating plate 2;

[0037] The mounting block 3 includes a cement mounting block 31 and an asphalt mounting block 32, and the materials of the cement mounting block 31 and the asphalt mounting block 32 are cement and asphalt respectively; the bottom end of the connecting rod 7 is fixedly mounted on the lifting plate 5, the return spring 27 is sleeved on the telescopic shaft 26, and the bottom ends of the telescopic shaft 26 and the return spring 27 are both fixedly mounted on the fixing box 4; the top end of the vertical pipe 10 is arranged to be inclined downward, and the vertical pipe 10 is located on the left side of the mounting block 3, and a lead block is fixedly mounted on the bottom surface of the rotating plate 2.

[0038] When the plug-in block 15 is pulled out, the rotating plate 2 rotates downward under the action of gravity and impacts the pressure rod 6. The lifting plate 5 is pressed down by the pressure rod 6, so that the water under the lifting plate 5 is squeezed into the vertical pipe 10 and sprayed on the cement mounting block 31 and the asphalt mounting block 32 through the vertical pipe 10, thereby simulating the slippery road surface. By setting the cement mounting block 31 and the asphalt mounting block 32, the static friction coefficient on the cement road surface and the asphalt road surface can be tested respectively. After the rotating plate 2 is lifted, the return spring 27 in the compressed state pushes the pressure rod 6 upward under the action of elasticity to achieve reset and wait for the rotating plate 2 to fall and then squeeze the pressure rod 6 downward. A limit block is set on the left side of the test bench 1, and the pressure rod 6 is overlapped on the limit block to prevent the pressure rod 6 from detaching from the test bench 1; by setting the lead block, the rotating plate 2 can fall quickly after losing the lock of the baffle 17, which increases the impact force on the pressure rod 6 and ensures the smooth movement of the pressure rod 6.

[0039] Embodiment 2

[0040] like Figures 4 to 7 As shown, the present invention provides a static friction coefficient test device for rubber tire production, a connecting pipe 2 19 is fixedly installed on the top of the front end of the fixing box 4, the insides of the connecting pipe 2 19 and the connecting pipe 1 9 are both slidably connected with a blocking shaft 29, a connecting frame 21 is fixedly installed on the front side of the vertical pipe 10, a rotating telescopic rod 22 is rotatably connected to the middle of the connecting frame 21, and push-pull frames 23 are fixedly installed on the upper and lower ends of the rotating telescopic rod 22, magnetic blocks 24 are fixedly installed on the front ends of the connecting pipe 1 9 and the connecting pipe 2 19, and a spring 25 is fixedly installed on the top of the lifting plate 5;

[0041] A water inlet pipe 11 is fixedly installed at the bottom end of the right side of the fixed box 4, and an air inlet pipe 20 is fixedly installed at the top end of the right side of the fixed box 4. The water inlet pipe 11 and the air inlet pipe 20 are one-way pipes, and the water inlet pipe 11 is connected to an external water source; the magnetic block 24 has magnetism, the push-pull frame 23 is made of iron material, and the diameter value of the rear end of the blocking shaft 29 is equal to the inner diameter value of the connecting pipe 2 19 and the connecting pipe 1 9.

[0042] By pushing the top end of the rotating telescopic rod 22 backward, the connecting pipe 2 19 is opened and the connecting pipe 1 9 is closed. During the lifting of the rotating plate 2, the lifting plate 5 is driven upward by the elastic force of the spring 1 8 and the spring 2 25, and then the air is sprayed on the rotating plate 2 and the mounting block 3 through the vertical pipe 10, and then the air is dried. During the downward movement of the rotating plate 2, the air in the fixed box 4 can be replenished. By continuously lifting and moving the rotating plate 2 up and down, the water on the rotating plate 2 can be dried and cleaned. The setting of the water inlet pipe 11 and the air inlet pipe 20 can ensure that the water and air in the fixed box 4 can be replenished in time after being consumed, and the setting of the one-way pipe can avoid the water and air flowing out through the water inlet pipe 11 and the air inlet pipe 20 respectively during squeezing; the push-pull frame 23 made of iron material can be adsorbed on the magnetic block 24 after contacting with the magnetic block 24, thereby avoiding accidental rotation and ensuring the smooth operation of the device.

[0043] Embodiment 3

[0044] like Figure 3 to Figure 4 As shown, the present invention provides a static friction coefficient test device for rubber tire production, a ratchet 14 is fixedly installed at the front end of the rotating plate 2, a plug-in block 15 is placed on the top of the test bench 1, a limit frame 16 is fixedly installed at the bottom end of the plug-in block 15, a baffle 17 is rotatably connected to the right end of the limit frame 16, and a back-pull spring 18 is fixedly installed between the limit frame 16 and the baffle 17;

[0045] When the incomplete gear 12 rotates, the incomplete gear 12 rotates one circle, and the rotating plate 2 is lifted up five degrees. At this time, the baffle 17 blocks the ratchet 14 to prevent the rotating plate 2 from rotating in the opposite direction, and maintains the current angle. The rotating plate 2 can be slowly lifted up, and after lifting five degrees, this degree can be maintained for a certain period of time to observe whether the sample block slides down. When the sample block slides down, the precise lifting degree can be obtained, thereby improving the accuracy of the static friction coefficient.

[0046] A static friction coefficient test method for rubber tire production comprises the following steps:

[0047] First, the rubber tire is processed and sliced ​​to obtain a sample block, and the cement mounting block 31 and the asphalt mounting block 32 are respectively mounted on the rotating plate 2, and then the sample blocks are respectively placed on the cement mounting block 31 and the asphalt mounting block 32;

[0048] Start the driving motor 28, which drives the incomplete gear 12 to rotate. The incomplete gear 12 meshes with the transmission gear 13 once every rotation, thereby driving the transmission gear 13 to rotate five degrees, so that the transmission gear 13 is lifted up five degrees. When the rotating plate 2 rotates, the ratchet 14 can be driven to rotate, thereby pushing the baffle 17 to turn right. When the incomplete gear 12 is not meshed with the transmission gear 13, the left end of the ratchet 14 is stuck on the baffle 17 and cannot rotate in the opposite direction. With the periodic rotation of the incomplete gear 12, the rotating plate 2 can be intermittently lifted upward gradually. After lifting, the return spring 27 in a compressed state pushes the pressure rod 6 upward. When one of the sample blocks slides off the cement mounting block 31 or the asphalt mounting block 32, the number of revolutions of the incomplete gear 12 is recorded, and the incomplete gear 12 continues to rotate until the other sample block also slides off. At this time, the static friction coefficient of the rubber tire sample blocks on the cement mounting block 31 and the asphalt mounting block 32 can be calculated;

[0049] Subsequently, the driving motor 28 is stopped, and the plug-in block 15 is pulled out upward, and the ratchet 14 loses the shielding of the baffle 17. Under the gravity of the lead block on the rotating plate 2, the rotating plate 2 can be driven to rotate downward in the opposite direction, so that the left end of the rotating plate 2 is pressed on the pressure rod 6, driving the pressure rod 6 to move downward, and then driving the lifting plate 5 to move downward in the inner cavity of the fixed box 4, squeezing the water under the connecting rod 7 into the vertical pipe 10, and spraying it on the cement mounting block 31 and the asphalt mounting block 32 through the vertical pipe 10, thereby simulating the situation that the road surface is wet and slippery. Subsequently, the sample block is placed on the cement mounting block 31 and the asphalt mounting block 32 again, and the plug-in block 15 is inserted into the test bench 1, and the driving motor 28 is started again to drive the rotating plate 2 to move. When the two sample blocks slide off the cement mounting block 31 and the asphalt mounting block 32 respectively, the static friction coefficient of the rubber tire sample block under the condition of wet and slippery road surface can be obtained;

[0050] After the test is completed, the top of the rotating telescopic rod 22 is pushed backward, so that the blocking shaft 29 in the connecting tube 1 9 blocks the connecting tube 1 9, and the blocking shaft 29 in the connecting tube 2 19 is pushed out, the space at the top of the fixed box 4 is opened, and then the plug-in block 15 is pulled out, and the driving motor 28 is started. When working, the driving motor 28 can drive the transmission gear 13 to rotate through the incomplete gear 12, thereby lifting the rotating plate 2 upward. At this time, the lifting plate 5 and the pressure rod 6 lose pressure, and the telescopic shaft 26 and the spring 1 8 pull the lifting plate 5 up, squeeze out the air through the vertical pipe 10, and spray it on the rotating plate 2. However, when the teeth on the incomplete gear 12 are separated from the transmission gear 13, the rotating plate 2 will fall downward in the opposite direction due to the loss of the baffle 17 blocking the ratchet 14, causing the lifting plate 5 to move downward. As the incomplete gear 12 continues to rotate, the vertical pipe 10 can continue to spray air on the rotating plate 2, thereby drying the water and achieving the cleaning effect.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A static friction coefficient test device for rubber tire production, comprising a test bench (1), characterized in that: The middle part of the test bench (1) is rotatably connected to a rotating plate (2), and the middle part of the rotating plate (2) is clamped with a mounting block (3); A fixing box (4) is fixedly installed on the left side of the bottom end of the test bench (1), and a lifting plate (5) is slidably connected to the inner cavity of the fixing box (4). A pressure rod (6) is slidably connected to the left end of the test bench (1), and a connecting rod (7) is fixedly installed on the bottom end of the pressure rod (6). A telescopic shaft (26) and a return spring (27) are fixedly installed on the bottom end of the pressure rod (6). A spring (8) is fixedly installed on the bottom end of the lifting plate (5). A connecting pipe (9) is fixedly installed on the bottom end of the fixing box (4), and a vertical pipe (10) is fixedly installed on the front end of the connecting pipe (9); A driving motor (28) is fixedly mounted on the right side of the test bench (1), an incomplete gear (12) is fixedly sleeved on the output end of the driving motor (28), and a transmission gear (13) is fixedly sleeved on the front end of the rotating plate (2).

2. The static friction coefficient test device for rubber tire production according to claim 1, characterized in that: A second connecting pipe (19) is fixedly mounted on the top of the front end of the fixing box (4), and a blocking shaft (29) is slidably connected inside the second connecting pipe (19) and the first connecting pipe (9). A connecting frame (21) is fixedly mounted on the front side of the vertical pipe (10), and a rotating telescopic rod (22) is rotatably connected to the middle of the connecting frame (21), and push-pull frames (23) are fixedly mounted on the upper and lower ends of the rotating telescopic rod (22). A magnetic block (24) is fixedly mounted on the front ends of the first connecting pipe (9) and the second connecting pipe (19), and a second spring (25) is fixedly mounted on the top end of the lifting plate (5).

3. The static friction coefficient test device for rubber tire production according to claim 1, characterized in that: A ratchet (14) is fixedly mounted on the front end of the rotating plate (2); a plug-in block (15) is placed on the top end of the test bench (1); a limit frame (16) is fixedly mounted on the bottom end of the plug-in block (15); a baffle (17) is rotatably connected to the right end of the limit frame (16); and a back-pull spring (18) is fixedly mounted between the limit frame (16) and the baffle (17).

4. The static friction coefficient test device for rubber tire production according to claim 1, characterized in that: The mounting blocks (3) comprise a cement mounting block (31) and an asphalt mounting block (32), and the materials of the cement mounting block (31) and the asphalt mounting block (32) are cement and asphalt, respectively.

5. The static friction coefficient test device for rubber tire production according to claim 1, characterized in that: The bottom end of the connecting rod (7) is fixedly mounted on the lifting plate (5), the return spring (27) is sleeved on the telescopic shaft (26), and the bottom ends of the telescopic shaft (26) and the return spring (27) are both fixedly mounted on the fixed box (4).

6. The static friction coefficient test device for rubber tire production according to claim 2, characterized in that: A water inlet pipe (11) is fixedly installed at the bottom end of the right side of the fixing box (4), and an air inlet pipe (20) is fixedly installed at the top end of the right side of the fixing box (4). The water inlet pipe (11) and the air inlet pipe (20) are one-way pipes, and the water inlet pipe (11) is connected to an external water source.

7. The static friction coefficient test device for rubber tire production according to claim 2, characterized in that: The magnetic block (24) has magnetism, the push-pull frame (23) is made of iron material, and the diameter value of the rear end of the blocking shaft (29) is equal to the inner diameter value of the connecting pipe 2 (19) and the connecting pipe 1 (9).

8. The static friction coefficient test device for rubber tire production according to claim 1, characterized in that: The top end of the vertical pipe (10) is arranged to be inclined downward, and the vertical pipe (10) is located on the left side of the mounting block (3). A lead block is fixedly mounted on the bottom surface of the rotating plate (2).

9. A method for testing the static friction coefficient of rubber tire production, characterized in that: The steps include: Firstly, the rubber tire is processed and sliced ​​to obtain a sample block, a cement mounting block (31) and an asphalt mounting block (32) are respectively mounted on a rotating plate (2), and then the sample block is respectively placed on the cement mounting block (31) and the asphalt mounting block (32); The driving motor (28) is started, and the driving motor (28) drives the incomplete gear (12) to rotate. The incomplete gear (12) meshes with the transmission gear (13) once every rotation, thereby driving the transmission gear (13) to rotate five degrees, so that the transmission gear (13) is lifted up five degrees. When the rotating plate (2) rotates, the ratchet (14) can be driven to rotate, thereby pushing the baffle (17) to turn right. When the incomplete gear (12) is not meshed with the transmission gear (13), the left end of the ratchet (14) is stuck on the baffle (17) and cannot rotate in the opposite direction. The periodic rotation of the gear (12) can cause the rotating plate (2) to be intermittently and gradually lifted upward. After being lifted, the return spring (27) in a compressed state pushes the pressure rod (6) upward. When one of the sample blocks slides off the cement mounting block (31) or the asphalt mounting block (32), the number of revolutions of the incomplete gear (12) is recorded, and the incomplete gear (12) continues to rotate until the other sample block also slides off. At this time, the static friction coefficient of the rubber tire sample blocks on the cement mounting block (31) and the asphalt mounting block (32) can be calculated. Subsequently, the driving motor (28) is stopped, the plug-in block (15) is pulled out upward, the ratchet (14) loses the shielding of the baffle (17), and the rotating plate (2) can be driven to rotate in the opposite direction downward under the gravity of the lead block on the rotating plate (2), so that the left end of the rotating plate (2) is pressed on the pressure rod (6), driving the pressure rod (6) to move downward, and then driving the lifting plate (5) to move downward in the inner cavity of the fixed box (4), squeezing the water under the connecting rod (7) into the vertical pipe (10), and spraying it on the cement through the vertical pipe (10). The test block (15) is placed on the cement mounting block (31) and the asphalt mounting block (32) to simulate a slippery road surface. The test block is then placed on the cement mounting block (31) and the asphalt mounting block (32) again, the plug-in block (15) is inserted into the test bench (1), and the drive motor (28) is started again to drive the rotating plate (2) to move. When the two test blocks slide off the cement mounting block (31) and the asphalt mounting block (32) respectively, the static friction coefficient of the rubber tire test block under the slippery road surface can be obtained. After the test is completed, the top end of the rotating telescopic rod (22) is pushed backward, so that the blocking shaft (29) in the connecting tube (9) blocks the connecting tube (9), and the blocking shaft (29) in the connecting tube (19) is pushed out, the space at the top end of the fixed box (4) is opened, and then the plug-in block (15) is pulled out, and the driving motor (28) is started. When the driving motor (28) is working, it can drive the transmission gear (13) to rotate through the incomplete gear (12), thereby lifting the rotating plate (2) upward. At this time, the lifting plate (5) and the pressure rod (6) are lost. The pressure is removed, and the telescopic shaft (26) and the spring (8) pull the lifting plate (5) upward, squeezing out air through the vertical pipe (10) and spraying it on the rotating plate (2). However, when the teeth on the incomplete gear (12) are separated from the transmission gear (13), the rotating plate (2) will fall downward in the opposite direction due to the loss of the baffle (17) blocking the ratchet (14), causing the lifting plate (5) to move downward. As the incomplete gear (12) continues to rotate, the vertical pipe (10) can continuously spray air on the rotating plate (2), thereby drying the water and achieving a cleaning effect.

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