Double-layer tire and uniformity detection device thereof

Abstract

The invention discloses a double-layer tire and a uniformity detection device thereof, and relates to the technical field of tire manufacturing, the double-layer tire comprises a double-layer tire, a rotating column and a mounting seat for mounting the double-layer tire, the mounting seat is provided with a sealing clamping piece for clamping the upper edge and the lower edge of the double-layer tire, and the mounting seat is provided with an inflation assembly acting on the inner side of the double-layer tire. The tire provided by the invention has the technical advantages that the tire manufactured by adopting the formula of the outer-layer wear-resistant rubber material and the inner-layer foaming rubber material can be directly used without assembling an inner tube and inflating, so that the problem that the use is influenced by air leakage or tire burst of the inner tube is solved; the inflation assembly inflates the interior of the double-layer tire, the pressing box and the crimping part are driven by the rotating column to rotate around the double-layer tire, the double-layer tire is pressed by the crimping part to deform during the period, the pressure value generated by deformation is detected in real time by the pressure gauge in the circumferential rotation process, and then uniformity detection of the interior of the double-layer tire is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of tire manufacturing, and in particular to a double-layer tire and a uniformity detection device thereof. Background Art

[0002] At present, the popular automobile tires on the market are divided into two categories: tube tires and tubeless tires. Tube tires are traditional, and tubeless tires are commonly known as vacuum tires. Vacuum tires are formed by the outer tube tightly fitting on the rim of a special structure to form a sealed inner cavity. This type of tire can continue to drive when the puncture is small, and it is easier to repair midway than tube tires, without removing the rim, so in some cases, there is no need for a spare tire, and its driving safety is also better; at the same time, this type of tire has good softness, which can improve the cushioning performance of the tire, and has low heat generation and low operating temperature at high speeds, which can increase the service life of the tire. However, when the puncture of this vacuum tire is large, it deflates quickly and cannot continue to drive. If there is no spare tire and it is far away from the repair shop, it will also cause great inconvenience and even bring safety hazards.

[0003] If a new type of tire is designed that combines the advantages of both inner tube tires and tubeless tires, it is also necessary to consider how to conduct uniformity testing on the tire before it leaves the factory to improve the tire quality; and how to conduct effective, multi-directional and accurate testing of the tread of the new tire, which has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The present invention provides a double-layer tire and a uniformity detection device thereof, and the specific implementation is as follows:

[0005] A double-layer tire, comprising:

[0006] The outer layer tire is composed of 30-40 parts of natural rubber, 20-30 parts of styrene-butadiene rubber, 30-40 parts of butadiene rubber, 55-60 parts of 220 carbon black, 8-10 parts of aromatic oil, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 2-3 parts of antioxidant 4020, 2-3 parts of RD, 1-3 parts of microcrystalline wax, 5-10 parts of anti-wear agent, 1.5-2 parts of sulfur, and 1-2 parts of accelerator NS;

[0007] The inner layer tire is composed of 60-80 parts of natural rubber, 20-40 parts of styrene-butadiene rubber, 50-55 parts of 660 carbon black, 30-50 parts of light calcium, 8-10 parts of aromatic oil, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 2-3 parts of antioxidant 4020, 2-3 parts of RD, 5-8 parts of foaming agent, 1.5-2 parts of sulfur, and 1-2 parts of accelerator NS.

[0008] Preferably, the preparation process of the masterbatch of the outer layer tire is as follows: natural rubber is plasticized for 2 minutes, styrene-butadiene rubber, butadiene rubber, small additives and 1 / 2 weight portion of carbon black are added, plasticized for 2 minutes, the remaining 1 / 2 weight portion of carbon black and aromatic oil are added and plasticized for 3 minutes, the lumps are lifted and cleaned, and then pressed for 1 minute, and the temperature is above 160°C for rubber removal; the final rubber preparation process of the outer layer tire is as follows: the masterbatch is preheated in an internal mixer for 30 seconds, sulfur and small accelerators are added for 30 seconds, and the rubber is removed below 95°C.

[0009] Preferably, the preparation process of the masterbatch of the inner layer tire is as follows: natural rubber plasticizing for 2 minutes, adding small additives and carbon black for 2 minutes, adding light calcium and aromatic oil for 3 minutes, lifting and cleaning, pressing for another 1 minute, and discharging the rubber after the temperature is above 140°C; the final rubber mixing preparation process of the inner layer tire is as follows: preheating the masterbatch in an internal mixer for 30 seconds, adding small sulfur, accelerators and foaming agents for 30 seconds, and discharging the rubber below 95°C.

[0010] Based on the above technical scheme, the tire made of the outer layer wear-resistant rubber compound and the inner layer foaming rubber compound formula does not need to be assembled with an inner tube or inflated, and can be used directly, thereby solving the problem of inner tube leakage or tire blowout affecting use.

[0011] A uniformity detection device for a double-layer tire, comprising:

[0012] A mounting seat for mounting a double-layer tire, the mounting seat is provided with sealing clamping members for clamping the upper and lower edges of the double-layer tire, and the mounting seat is provided with an inflation assembly for acting on the inner side of the double-layer tire, and the inflation assembly is provided with a pressure gauge;

[0013] A rotating column is arranged on the peripheral side of the mounting seat, and a pressing box and a crimping piece are provided on the rotating column. A distance adjustment component is arranged in the pressing box to act on the crimping piece to push it out. The crimping piece is crimped to the outer side of the double-layer tire to cause it to deform. The pressure change inside the tire during the circumferential rotation of the crimping piece around the double-layer tire is detected by a pressure gauge to perform uniformity detection.

[0014] Based on the above technical solution, gas is injected into the double-layer tire through the inflation assembly, and then a rotating column is used to drive the pressing box and the crimping parts inside it to perform circular motion around the double-layer tire. During this process, the crimping parts will exert pressure on the double-layer tire, causing it to deform to a certain extent. At the same time, the pressure gauge will record and analyze the changes in pressure values ​​generated during this deformation process in real time, so as to accurately evaluate the uniformity inside the double-layer tire; the rotating column is set to a gear toothed disc structure driven by a conventional motor, and there is also a solenoid valve on the pipeline of the inflation assembly, which is opened during inflation and closed during detection.

[0015] Preferably, the crimping part includes a pressing ball and a limiting sleeve rotatably arranged on the upper and lower ends of the pressing ball; the pressing box is a C-shaped seat, and a second guide groove slidably connected to the handle end of the limiting sleeve is opened on the upper and lower parts thereof, and a reset spring is arranged between the two.

[0016] Preferably, the distance adjusting assembly is composed of no less than three guide balls, each guide ball is evenly arranged and abuts against the pressing ball, and the rod portion of each guide ball is provided with a first guide groove for radial movement, and a limit spring is provided between the first guide groove and the rod portion; the distance adjusting assembly also includes a motor, and a pull rope is provided between the rod portions of each guide ball, and the pull rope is also wrapped around the output end of the motor.

[0017] Based on the above technical solution, guide balls are provided during the circumferential rotation of the pressing ball. These guide balls can cause the pressing ball to rotate, thereby effectively reducing the friction during rotation. In addition, the spacing between adjacent guide balls can be flexibly adjusted through the distance adjustment component, and the force applied by the pressing ball to the double-layer tire can be accurately controlled to meet different detection requirements.

[0018] Preferably, a positioning slot plate is provided on the C-shaped seat, the direction of the slot opening of which is consistent with the first guide through slot, and the pull rope and the guide ball are respectively arranged on both sides of the positioning slot plate.

[0019] Preferably, both ends of the opening of the C-shaped seat are provided with inwardly inclined barbed hook structures, and the end surfaces of the barbed hooks are configured to act as a damping layer that can act on the pressing ball.

[0020] Preferably, the rotating column and the pressing box are rotatably connected via an elastic rotating seat, the elastic rotating seat includes a fixed block arranged on the back of the pressing box, the side of the fixed block is rotatably connected to a hinged seat extending outward from the rotating column via a positioning rod, and a lifting seat is provided at the bottom of the mounting seat, and a spring rod structure is provided between the fixed block and the rotating column; the spring rod structure is provided with an angle sensor at the end of the rotating column, and a pressure sensor is integrated on the hinged seat.

[0021] Based on the above technical scheme, by setting a damping layer, the pressing ball can be locked when the distance adjustment component pushes it out to the limit distance, and the mounting seat can also be equipped with a corresponding conventional self-rotation structure, and the external uniformity detection can be realized through the pressure sensor, the fixed pressing ball, and the rotating double-layer tire; by introducing the elastic rotating seat, the angle sensor and the lifting seat, the pressing ball can perform a pressing-type uniformity detection on the middle and peripheral parts of the double-layer tire table, thereby ensuring the comprehensiveness and accuracy of the detection process, so that each area of ​​the double-layer tire can be evaluated by uniformity detection.

[0022] Preferably, the mounting plates are connected by a hollow connecting rod, and the hollow connecting rod is provided with an air guide port communicating with the interior of the double-layer tire.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] 1. The tire of the present invention is made of the outer layer of wear-resistant rubber and the inner layer of foaming rubber, and can be used directly without assembling an inner tube or inflating the tire, thus solving the problem of inner tube leakage or puncture affecting the use;

[0025] 2. The present invention inflates the inside of the double-layer tire through the inflation assembly, and uses the rotating column to drive the pressing box and the crimping piece to rotate around the double-layer tire. During this period, the crimping piece presses the double-layer tire to cause deformation. During the circumferential rotation, the pressure value generated by the deformation is detected in real time by the pressure gauge, thereby realizing the uniformity detection inside the double-layer tire;

[0026] 3. The present invention arranges guide balls to rotate themselves when the pressing balls rotate circumferentially to reduce friction, and the pressing balls can be pushed out by adjusting the distance between adjacent guide balls through the distance adjustment assembly, thereby adjusting the magnitude of the force exerted by the pressing balls on the double-layer tire;

[0027] 4. The present invention can realize the pressing uniformity detection of different parts of the entire double-layer tire by the pressing ball by arranging the elastic rotating seat, the angle sensor and the lifting seat, thereby realizing the comprehensiveness of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0030] Figure 3 It is a cross-sectional schematic diagram of the structure of the present invention;

[0031] Figure 4 The structure of the pressing box and the pressing part in the present invention is shown in FIG. Figure 1 ;

[0032] Figure 5 The structure of the pressing box and the pressing part in the present invention is shown in FIG. Figure 2 ;

[0033] Figure 6 It is a cross-sectional schematic diagram of the pressing box and the pressing piece structure in the present invention;

[0034] Figure 7 The cross-sectional structure of the distance adjustment component in the present invention is shown in FIG. Figure 1 ;

[0035] Figure 8 The cross-sectional structure of the distance adjustment component in the present invention is shown in FIG. Figure 2 ;

[0036] Fig. 9 It is a schematic diagram of the adjustment structure of the double-layer tire and the crimping piece in the present invention;

[0037] Fig.10 This is a schematic diagram of the explosion structure of the press box in the present invention.

[0038] Fig.11 It is a result diagram of high-speed performance test of double-sided tires in the present invention;

[0039] Fig.12 It is a result diagram of the strength performance test of the double-sided tire in the present invention;

[0040] Fig.13 It is a result diagram of the durability performance test of the double-sided tire in the present invention.

[0041] Description of reference numerals:

[0042] 1. Lifting seat, 2. Mounting seat, 3. Inflatable assembly, 4. Rotating column, 5. Press box, 6. Crimp fitting, 7. Elastic rotating seat, 8. Pressure gauge, 9. Distance adjustment assembly, 10. Double-layer tire, 11. Pressure sensor, 12. Angle sensor,

[0043] 201, mounting plate, 202, sealing clamp, 203, hollow connecting rod, 204, air guide port, 401, hinged seat, 501, C-shaped seat, 502, first guide slot, 503, second guide slot, 504, side sealing plate, 505, damping layer, 601, pressing ball, 602, limiting sleeve, 603, reset spring, 701, first spring rod, 702, second spring rod, 703, fixing block, 704, positioning rod, 901, guide ball, 902, positioning slot plate, 903, motor, 904, pull rope, 905, guide wheel, 906, chain, 907, limiting spring, 1001, deformation point, 1002, outer tire, 1003, inner tire. DETAILED DESCRIPTION

[0044] The specific implementation of the invention is described below in conjunction with the accompanying drawings and embodiments:

[0045] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the invention without affecting the effects and purposes that can be achieved by the invention.

[0046] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the invention. Changes or adjustments in their relative relationships should be regarded as within the scope of the invention without substantially changing the technical content.

[0047] The following is combined with Figure 1-Figure 13 This application is described in further detail.

[0048] The embodiment of the present application discloses a double-layer tire and a uniformity detection device thereof.

[0049] Example 1

[0050] Reference Figures 1 to 13 This embodiment discloses a double-layer tire, including an outer tire 1002 and an inner tire 1003. The outer tire 1002 is composed of 30-40 parts of natural rubber, 20-30 parts of styrene-butadiene rubber, 30-40 parts of butadiene rubber, 55-60 parts of 220 carbon black, 8-10 parts of aromatic oil, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 2-3 parts of antioxidant 4020, 2-3 parts of RD, 1-3 parts of microcrystalline wax, and 5-10 parts of wear-resistant agent. 1.5-2 parts of sulfur, 1-2 parts of accelerator NS, the inner layer tire 1003 is composed of 60-80 parts of natural rubber, 20-40 parts of styrene-butadiene rubber: 50-55 parts of 660 carbon black, 30-50 parts of light calcium, 8-10 parts of aromatic oil, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 2-3 parts of antioxidant 4020, 2-3 parts of RD, 5-8 parts of foaming agent, 1.5-2 parts of sulfur, and 1-2 parts of accelerator NS.

[0051] The preparation process of the masterbatch of the outer layer tire 1002 is as follows: plasticize the natural rubber for 2 minutes, add styrene-butadiene rubber, butadiene rubber, small additives and 1 / 2 weight portion of carbon black, plasticize for 2 minutes, add the remaining 1 / 2 weight portion of carbon black and aromatic oil and plasticize for 3 minutes, lift and clean, press for another minute, and discharge the rubber at a temperature above 160°C. The final rubber preparation process of the outer layer tire 1002 in this structure is as follows: preheat the masterbatch in the internal mixer for 30 seconds, add sulfur and small accelerators for 30 seconds, and discharge the rubber below 95°C.

[0052] The preparation process of the masterbatch of the inner layer tire 1003 is as follows: natural rubber plasticizing for 2 minutes, adding small additives and carbon black for 2 minutes, adding light calcium and aromatic oil for 3 minutes, lifting and cleaning, pressing for another minute, and discharging the rubber after the temperature is above 140°C. The final rubber preparation process of the inner layer tire 1003 in this structure is as follows: preheating the masterbatch in the internal mixer for 30 seconds, adding small sulfur, accelerator and foaming agent for 30 seconds, and discharging the rubber below 95°C.

[0053] Example 2

[0054] Reference Figures 1 to 3, and based on the above embodiment, the present embodiment further discloses a double-layer tire uniformity detection device, comprising a mounting seat 2 for mounting a double-layer tire 10 and a rotating column 4 arranged on the circumferential side of the mounting seat 2, the mounting seat 2 is provided with a sealing clamping member 202 for clamping the upper and lower edges of the double-layer tire 10, and the mounting seat 2 is provided with an inflation component 3 acting on the inner side of the double-layer tire 10, the inflation component 3 is provided with a pressure gauge 8, the rotating column 4 is provided with a pressing box 5 and a crimping member 6, the pressing box 5 is provided with a distance adjustment component 9 acting on the crimping member 6 to push it out, the crimping member 6 is crimped to the outer side of the double-layer tire 10 to cause it to deform, and the pressure gauge 8 is used to detect the pressure change inside the tire during the circumferential rotation of the crimping member 6 around the double-layer tire 10 to perform uniformity detection.

[0055] The crimping part 6 includes a pressing ball 601 and a limiting sleeve 602 rotatably arranged on the upper and lower ends of the pressing ball 601. The pressing box 5 is a C-shaped seat 501, and a second guide groove 503 slidably connected to the handle end of the limiting sleeve 602 is provided on the upper and lower parts thereof, and a reset spring 603 is provided between the two. The mounting plates 201 are connected by a hollow connecting rod 203, and the hollow connecting rod 203 is provided with an air guide port 204 communicated with the interior of the double-layer tire 10.

[0056] The specific implementation process is: put the double-layer tire 10 on the mounting seat 2, and use the sealing clamp 202 to clamp and seal it; open the inflation component 3 to inflate the double-layer tire 10, and then make the pressing ball 601 squeeze the double-layer tire 10 to produce a deformation point 1001; the rotating column 4 drives the pressing ball 601 to rotate along the circumference of the double-layer tire 10, and during this period, the value of the pressure gauge 8 is detected in real time.

[0057] Example 3

[0058] Reference Figures 4 to 8 , and based on the above embodiment, this embodiment further discloses a double-layer tire uniformity detection device, the distance adjustment component 9 is composed of a motor 903 and no less than three guide balls 901, each guide ball 901 is evenly arranged and abuts against the pressing ball 601, and the rod portion of each guide ball 901 is provided with a first radially movable guide groove 502, a limit spring 907 is provided between the first guide groove 502 and the rod portion, a pull rope 904 is provided between the rod portions of each guide ball 901, and the pull rope 904 is also wound around the output end of the motor 903. In this structure, the motor 903 is connected to the guide wheel 905 through the chain 906, and the pull rope 904 can be wound around the guide wheel 905, thereby realizing the adjustment of the installation position of the motor 903.

[0059] A positioning slot plate 902 is provided on the C-shaped seat 501, and the direction of its slot is consistent with the first guide slot 502, and the pull rope 904 and the guide ball 901 are respectively provided on both sides of the positioning slot plate 902. In this structure, side sealing plates 504 are provided on both sides of the C-shaped seat 501.

[0060] Example 4

[0061] Reference Figures 4 to 9 Based on the above embodiments, the present embodiment further discloses a double-layer tire uniformity detection device, wherein the rotating column 4 and the pressing box 5 are rotatably connected via an elastic rotating seat 7, the elastic rotating seat 7 comprises a fixed block 703 arranged at the back of the pressing box 5, the side of the fixed block 703 is rotatably connected to the hinge seat 401 extending outward from the rotating column 4 via a positioning rod 704, and a lifting seat 1 is provided at the bottom of the mounting seat 2, a first spring rod 701 and a second spring rod 702 are respectively provided between the upper and lower parts of the fixed block 703 and the rotating column 4, the first spring rod 701 is provided with an angle sensor 12 for inclination detection at the end of the rotating column 4, in the present structure, the position of the deformation point 1001 on the double-layer tire 10 is forced to change vertically by lifting and lowering the lifting seat 1, thereby realizing uniformity detection of different parts, and the pressing box 5 can be reset after the inclination angle changes driven by the spring rod structure.

[0062] Example 5

[0063] Reference Figures 1 to 10 Based on the above embodiments, this embodiment further discloses a double-layer tire uniformity detection device, inwardly inclined hook structures are provided at both ends of the opening of the C-shaped seat 501, and the end faces of the hooks are configured to act on a damping layer 505 that can act on a pressing ball 601. A conventional motor gear-type self-rotation structure is provided between the mounting seat 2 and the lifting seat 1, and a pressure sensor 11 is integrated on the articulated seat 401. In this structure, the damping layer 505 can also be configured to have a contour that matches the pressing ball 601.

[0064] The specific implementation process is: the distance adjustment component 9 pushes the pressing ball 601 out to abut against the damping layer 505, so that the pressing ball 601 is locked; the mounting seat 2 and the double-layer tire 10 are driven to rotate through the self-rotation structure, and the circumferential uniformity of the outside can also be detected through the pressure sensor 11; at the same time, the lifting seat 1 can also be used to realize the vertical adjustment of the detection part on the double-layer tire 10.

[0065] Many other changes and modifications may be made without departing from the spirit and scope of the invention.It should be understood that the invention is not limited to the specific embodiments, and the scope of the invention is defined by the appended claims.

Claims

1. A double-layer tire, characterized in that: include: The outer layer tire (1002) is composed of 30-40 parts of natural rubber, 20-30 parts of styrene-butadiene rubber, 30-40 parts of butadiene rubber, 55-60 parts of 220 carbon black, 8-10 parts of aromatic oil, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 2-3 parts of antioxidant 4020, 2-3 parts of RD, 1-3 parts of microcrystalline wax, 5-10 parts of anti-wear agent, 1.5-2 parts of sulfur, and 1-2 parts of accelerator NS; The inner layer tire (1003) is composed of 60-80 parts of natural rubber, 20-40 parts of styrene-butadiene rubber: 50-55 parts of 660 carbon black, 30-50 parts of light calcium, 8-10 parts of aromatic oil, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 2-3 parts of antioxidant 4020, 2-3 parts of RD, 5-8 parts of foaming agent, 1.5-2 parts of sulfur, and 1-2 parts of accelerator NS.

2. A double-layer tire according to claim 1, characterized in that: The masterbatch preparation process of the outer layer tire (1002) is as follows: natural rubber is plasticized for 2 minutes, styrene-butadiene rubber, butadiene rubber, small additives and 1 / 2 weight portion of carbon black are added, plasticized for 2 minutes, the remaining 1 / 2 weight portion of carbon black and aromatic oil are added and plasticized for 3 minutes, the lumps are lifted and cleaned, and then pressed for 1 minute, and the temperature is above 160°C for rubber removal; The final rubber mixing process of the outer layer tire (1002) is as follows: preheating the masterbatch in an internal mixer for 30 seconds, adding sulfur and accelerator small materials for 30 seconds, and draining the masterbatch at a temperature below 95°C.

3. A double-layer tire according to claim 1, characterized in that: The preparation process of the masterbatch of the inner layer tire (1003) is as follows: natural rubber is plasticized for 2 minutes, small additives and carbon black are added to the rubber for 2 minutes, light calcium and aromatic oil are added to the rubber for 3 minutes, the lumps are lifted and cleaned, and then pressed for 1 minute, and the rubber is discharged after the temperature is above 140°C; The final rubber mixing preparation process of the inner layer tire (1003) is as follows: the masterbatch is preheated in an internal mixer for 30 seconds, sulfur, accelerator and foaming agent are added for 30 seconds, and the rubber is discharged at a temperature below 95°C.

4. A double-layer tire uniformity detection device, which uses the double-layer tire described in any one of claims 1 to 3, characterized in that: include: A mounting seat (2) for mounting a double-layer tire (10), the mounting seat (2) being provided with sealing clamping members (202) for clamping the upper and lower edges of the double-layer tire (10), and the mounting seat (2) being provided with an inflation assembly (3) for acting on the inner side of the double-layer tire (10), the inflation assembly (3) being provided with a pressure gauge (8); A rotating column (4) is arranged on the peripheral side of the mounting seat (2), and a pressing box (5) and a crimping piece (6) are arranged on the rotating column (4). A distance adjustment component (9) is arranged inside the pressing box (5) for acting on the crimping piece (6) to push it out. The crimping piece (6) is crimped to the outer side of the double-layer tire (10) to cause deformation. The pressure gauge (8) is used to detect the pressure change inside the tire during the circumferential rotation of the crimping piece (6) around the double-layer tire (10) to perform uniformity detection.

5. A double-layer tire uniformity detection device according to claim 4, characterized in that: The crimping member (6) comprises a pressing ball (601) and a limiting sliding sleeve (602) rotatably arranged at the upper and lower ends of the pressing ball (601); The pressing box (5) is a C-shaped seat (501), and a second guide slot (503) is provided on the upper and lower parts thereof for sliding connection with the handle end of the limiting sliding sleeve (602), and a return spring (603) is provided between the two.

6. A double-layer tire uniformity detection device according to claim 5, characterized in that: The distance adjustment assembly (9) is composed of no less than three guide balls (901), each of the guide balls (901) is evenly arranged and abuts against the pressing ball (601), and the rod portion of each guide ball (901) is provided with a first guide slot (502) for radial movement, and a limit spring (907) is provided between the first guide slot (502) and the rod portion; The distance adjustment component (9) further comprises a motor (903), a pull rope (904) is provided between the rods of each of the guide balls (901), and the pull rope (904) is also wound around the output end of the motor (903).

7. A double-layer tire uniformity detection device according to claim 6, characterized in that: The C-shaped seat (501) is provided with a positioning slot plate (902), the direction of the slot opening of which is consistent with the first guide slot (502), and the pull rope (904) and the guide ball (901) are respectively arranged on both sides of the positioning slot plate (902).

8. A double-layer tire uniformity detection device according to claim 6, characterized in that: Both ends of the opening of the C-shaped seat (501) are provided with inwardly inclined barbed hook structures, and the end surfaces of the barbed hooks are configured to act on the damping layer (505) of the pressing ball (601).

9. A double-layer tire uniformity detection device according to claim 4, characterized in that: The mounting plates (201) are connected to each other via a hollow connecting rod (203), and an air guide port (204) communicating with the interior of the double-layer tire (10) is provided on the hollow connecting rod (203).

10. A double-layer tire uniformity detection device according to claim 4, characterized in that: The rotating column (4) and the pressing box (5) are rotatably connected via an elastic rotating seat (7), the elastic rotating seat (7) comprising a fixed block (703) arranged on the back of the pressing box (5), the side of the fixed block (703) being rotatably connected to a hinge seat (401) extending outward from the rotating column (4) via a positioning rod (704), and a lifting seat (1) is arranged at the bottom of the mounting seat (2), and a spring rod structure is arranged between the fixed block (703) and the rotating column (4); The spring rod structure is provided with an angle sensor (12) at the end of the rotating column (4), and a pressure sensor (11) is integrated on the hinge seat (401).

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