A measuring device for detecting the inner surface of an inflated tire

Abstract

The present invention belongs to the field of tire production and testing equipment, and provides a measuring device for detecting the inner surface of an inflated tire, including a detection center frame and a displacement sensor. A ZR actuator is arranged on the detection center frame. On the execution end Y-shaped arm, bow-shaped arm, support arm, connecting arm and profiling arm of the ZR actuator, the perimeter profile of the profiling arm matches the cross-sectional profile of the inflated tire. A combined drive belt, a drive gear set and a drive hose are arranged on the profiling arm. A plurality of rolling contact components are arranged on the drive hose. Inside the rolling contact component, there is a pair of displacement sensors that are in contact and cooperate with both ends of the rolling roller. A transmission line for electrically connecting with the displacement sensor is arranged inside the drive hose, and a controller is arranged at the transmission terminal of the transmission line. This device is reasonably designed, uses contact detection, has comprehensive detection, is beneficial to reducing the probability of missed detection and misdetection, and is beneficial to improving the detection efficiency, and is suitable for large-scale promotion.

Description

Technical Field

[0001] The present invention belongs to the field of tire production and testing equipment, and particularly relates to a measuring device for detecting the inner surface of an inflated tire. Background Art

[0002] An inflated tire is manufactured by overlapping and pasting various materials such as an inner liner layer, a carcass ply, a belt, and a tread. The measurement of the inner surface of an inflated tire includes multiple contents, such as dimension parameter measurement, surface defect detection, rubber aging degree, and balance detection. Among them, surface defect detection is a detection item based on the possible bulge and crack problems on the inner surface of the tire.

[0003] Currently, the detection of tire surface defects in many workshops is completed by X-ray instruments and equipment, such as a method and related products for marking tire defects disclosed in CN202311280513.8 and an equipment and method for X-ray photography of tires disclosed in CN200680043230.X. However, the equipment using X-ray detection needs to have a high resolution. Coupled with the fact that new tires generally have a relatively uniform dark color tone, otherwise the defect problems shown in the final imaging are not obvious, which will affect the detection accuracy. Since the direct manifestations of bulge and crack problems on the inner surface of a new tire are both the formation of undulations on the inner surface, including obvious flanging gaps on the inner surface of the tire when cracks occur, direct contact detection can directly obtain the corresponding defect conditions. Currently, the equipment using direct contact detection mostly relies on manual detection. However, in this case, incomplete detection sites will directly cause missed and misdetected situations, and the detection efficiency also needs to be improved to meet the needs of industrial production lines. Summary of the Invention

[0004] In view of the technical problems existing in the above-mentioned measuring device, the present invention provides a measuring device for detecting the inner surface of an inflated tire, which has a reasonable design, adopts contact detection, has comprehensive detection, is beneficial to reducing the probability of missed and misdetected cases, and is beneficial to improving the detection efficiency.

[0005] To achieve the above object, the technical solution adopted by the present invention is that a measuring device for detecting the inner surface of an inflated tire provided by the present invention includes a detection center frame and a displacement sensor. The detection center frame is used to arrange detection points from the center position of the inflated tire. A ZR actuator capable of performing telescopic and rotational movements is provided on the detection center frame. The execution end of the ZR actuator faces the inner surface direction of the inflated tire and is provided with a Y-shaped arm. A pair of bow-shaped arms are provided at the end of the Y-shaped arm far from the ZR actuator. A support arm for controlling the distance between the two bow-shaped arms is provided between the bow-shaped arms. Two pairs of connecting arms are provided at both ends of the two bow-shaped arms. The two pairs of connecting arms are arranged on a profiling arm. The perimeter profile of the profiling arm matches the cross-sectional profile of the inflated tire. A week of combined drive belts is provided on the circumferential surface of the profiling arm. A transmission gear set for driving the combined drive belt to move along the circumferential direction of the profiling arm is provided between the connecting arm and the profiling arm. A plurality of rolling contact components are provided on the combined drive belt and are distributed in sequence front and back and are used to elastically contact the inner surface of the inflated tire. The rolling contact component is connected by a pair of connecting transmission hoses. The transmission hose is provided with the rolling contact component including a moving roller. A rolling roller is provided on the moving roller. A pair of displacement sensors in contact with both ends of the rolling roller are provided inside the rolling contact component. A transmission line for electrically connecting with the displacement sensor is provided inside the transmission hose. A controller is provided at the transmission terminal of the transmission line.

[0006] Preferably, the combined drive belt includes a belt and a copper strip. The cross-section of the belt and the cross-section of the copper strip are in a cross shape and a straight shape respectively. A pair of clamping plates for clamping the belt are provided on the inner circumferential surface of the profiling arm. The clamping plate is in an L shape. A week of transmission grooves with a T-shaped cross-section is provided on the outer circumferential surface of the profiling arm. The groove surface of the transmission groove is for the copper strip to move. A belt track for the belt to make circumferential displacement is formed between the transmission groove and the clamping plate. The belt, the copper strip and the rolling contact component are synchronously connected.

[0007] Preferably, the transmission gear set includes a rubber soft rack connected to the copper strip. An external gear ring is provided on the transmission side of the rubber soft rack. Two symmetrically distributed gears meshing with the external gear ring are provided between the two pairs of connecting arms. A wheel shaft is provided at the center of the gear. The wheel shaft is axially connected to the connecting arm and the bow-shaped arm. An end cap is provided at the end of the wheel shaft. A servo motor is provided at the end of one of the wheel shafts.

[0008] Preferably, the external gear ring is in a C-shaped structure and the C-shaped opening thereof faces the execution end of the ZR actuator. An end plate is provided at the end of the C-shaped opening of the external gear ring. The radial height of the end plate is greater than the tooth tip height of the external gear ring.

[0009] Preferably, two inner pipes for passing through the transmission hose are arranged in parallel inside the rubber flexible rack. Two outer pipes communicating with the transmission hose are arranged on both sides of the rubber flexible rack. The Y-shaped arm and the execution end of the ZR actuator are provided with hollow channels for the outer pipes to pass through.

[0010] Preferably, the rolling contact assembly includes a spacer. The spacer includes an I-shaped connecting plate. A pair of connecting holes are arranged at the bottom of the connecting plate. Screws for installing the connecting belt, copper belt and rolling contact assembly are arranged in the connecting holes. A pair of through pipes for passing through the transmission hose are arranged at the top of the connecting plate. Sunk openings are arranged at both ends of the through pipe. The sunk openings correspond to the guide pipes arranged at the bottom of the moving roller. Flexible connecting springs are arranged in the sunk openings and the guide pipes.

[0011] Preferably, both ends of the guide pipe are in a shape of an inverted V, and both ends of the through pipe are in a shape of a V.

[0012] Preferably, a support groove for the rolling roller to roll is arranged on the moving roller. Guide grooves for the shaft ends of the rolling roller to make radial displacement are arranged at both ends of the support groove. A return spring for supporting the shaft ends of the rolling roller is arranged at the bottom of the guide groove. The detection end of the displacement sensor is connected from the center of the return spring to the shaft end of the rolling roller.

[0013] Preferably, the rolling roller includes a left roller and a right roller. The opposite ends of the left roller and the right roller cooperate with the guide grooves. Tenons and waist-shaped shaft eyes are respectively arranged at the opposite ends of the left roller facing the right roller. The waist-shaped shaft eyes allow the tenons to slide radially. Conical extrusion mating surfaces are arranged at the opposite ends of the left roller and the right roller.

[0014] Preferably, a plurality of welding pipes are arranged on the side surface of the profiling arm. The welding pipes are distributed at the turning nodes of the profiling arm. A crank lever is arranged on the welding pipe. A friction roller is arranged on the crank lever. The friction roller frictionally drives with the belt surface of the combined transmission belt and is used to prevent the combined transmission belt from jumping.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0016] 1. A measuring device for detecting the inner surface of an inflated tire provided by the present invention. The ZR actuator can control the mechanical structure from the Y-shaped arm to the profiling arm to perform telescopic and flipping actions, which are used for the profiling arm to enter and exit the detection station. The rolling contact assembly carried by the profiling arm can perform a stepping action along the inner surface of the inflated tire under the action of a servo motor, a transmission gear set, a combined transmission belt, and a transmission hose. The inflated tire can roll on the rolling device at the workshop detection station, and a displacement sensor is used to obtain the corresponding surface data, including detecting the conditions of bulges and cracks. This device is reasonably designed, adopts contact detection, has comprehensive detection, is beneficial to reducing the probability of missed detection and misdetection, and is beneficial to improving the detection efficiency, making it suitable for large-scale promotion. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 An axonometric view of a measuring device for detecting the inner surface of an inflated tire provided for the embodiment and a fully sectioned inflated tire;

[0019] Figure 2 A front view of a measuring device for detecting the inner surface of an inflated tire provided for the embodiment and a complete inflated tire;

[0020] Figure 3 A top view of a measuring device for detecting the inner surface of an inflated tire provided for the embodiment and a fully sectioned inflated tire;

[0021] Figure 4 A partial cross-sectional view of a measuring device for detecting the inner surface of an inflated tire;

[0022] Figure 5 A front view of a measuring device for detecting the inner surface of an inflated tire (without a detection center frame);

[0023] Figure 6 An axonometric view of a measuring device for detecting the inner surface of an inflated tire (without a detection center frame);

[0024] Figure 7 A top view of a measuring device for detecting the inner surface of an inflated tire (without a detection center frame);

[0025] Figure 8 An exploded view of the rolling contact assembly provided for the embodiment;

[0026] Figure 9Front view of the rolling contact assembly provided for the embodiment;

[0027] Figure 10 Side view of the rolling contact assembly provided for the embodiment;

[0028] Figure 11 Schematic diagram of the connection of a single rolling contact assembly with a transmission hose and an outer tube provided for the embodiment;

[0029] In the above figures:

[0030] 1. Inspection center rest; 2. Displacement sensor; 3. ZR actuator; 4. Y-shaped arm; 5. Bow-shaped arm; 6. Support arm; 7. Connecting arm;

[0031] 8. Profiling arm; 81. Clamping plate; 82. Transmission groove; 83. Belt track; 84. Welded pipe; 85. Crank lever; 86. Friction roller;

[0032] 9. Combined transmission belt; 91. Belt; 92. Copper belt;

[0033] 10. Transmission gear set; 101. Rubber soft rack; 102. External gear ring; 103. Gear; 104. Axle; 105. End cap; 106. End plate;

[0034] 11. Transmission hose;

[0035] 12. Rolling contact assembly; 121. Moving roller; 1211. Support groove; 1212. Guide groove; 122. Rolling roller; 1221. Left roller; 1222. Right roller; 1223. Tenon; 1224. Waist-shaped axle hole; 1225. Extrusion mating surface; 123. Spacer; 1231. Connecting plate; 1232. Connecting hole; 1233. Central through pipe; 1234. Counterbore; 124. Guide pipe; 125. Flexible connection spring; 126. Return spring;

[0036] 13. Servo motor;

[0037] 14. Outer tube;

[0038] 15. Hollow hole;

[0039] 16. Pneumatic tire. Detailed implementation manners

[0040] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other. For the convenience of description, the words "upper", "lower", "left" and "right" as used below only indicate the same directions as the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

[0041] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0042] Examples, such as Figures 1-11 As shown, a measuring device for detecting the inner surface of an inflated tire provided by the present invention includes a detection center frame 1 and a displacement sensor 2. The detection center frame 1 includes a ring beam and a cantilever. The maximum diameter of the ring beam is smaller than the inner diameter of the inflated tire 16. The detection center frame 1 is used to arrange detection points from the central position of the inflated tire 16. A ZR actuator 3 capable of performing telescopic and rotational movements is provided on the detection center frame 1. The execution end of the ZR actuator 3 faces the inner surface direction of the inflated tire 16 and is provided with a Y-shaped arm 4. A pair of bow-shaped arms 5 are provided at the end of the Y-shaped arm 4 away from the ZR actuator 3. A support arm 6 for controlling the distance between the two bow-shaped arms 5 is provided between the bow-shaped arms 5. Two pairs of connecting arms 7 are provided at both ends of the two bow-shaped arms 5. The two pairs of connecting arms 7 are provided on a profiling arm 8. The perimeter profile of the profiling arm 8 matches the cross-sectional profile of the inflated tire 16. A set of combined drive belts 9 is provided on the circumferential surface of the profiling arm 8. A set of 10 drive gears 10 for driving the combined drive belts 9 to move along the circumferential direction of the profiling arm 8 is provided between the connecting arms 7 and the profiling arm 8. A pair of drive hoses 11 that move synchronously with the combined drive belts 9 are provided on the combined drive belts 9. A plurality of rolling contact components 12 that are distributed in sequence front and back and are used to elastically contact the inner surface of the inflated tire 16 are provided on the drive hoses 11. The rolling contact component 12 includes a moving roller 121, and a rolling roller 122 is provided on the moving roller 121. A pair of displacement sensors 2 that are in contact and cooperate with both ends of the rolling roller 122 are provided inside the rolling contact component 12. A transmission line for electrically connecting with the displacement sensors 2 is provided inside the drive hose 11. A controller is provided at the transmission terminal of the transmission line.

[0043] Specifically, the ZR actuator 3 can control the telescopic and flipping movements of the mechanical structure from the Y-shaped arm 4 to the profiling arm 8. In particular, the maximum width of the profiling arm 8 is greater than the narrower position of the pneumatic tire 16. Therefore, the flip-up design can be used for the profiling arm 8 to enter and exit the detection station, so that the rolling contact assembly 12 on the profiling arm 8 can better complete the contact detection with the inner surface of the pneumatic tire 16. Further, the rolling contact assembly 12 carried by the profiling arm 8 can perform a stepping action along the inner surface of the pneumatic tire 16 under the action of the servo motor 13, the transmission gear set 103, the combined transmission belt 9, and the transmission hose 11. The shortest stepping length can compensate for the installation gap between adjacent rolling contact assemblies 12 to satisfy the requirement that the inner surface of the pneumatic tire 16 has a complete detection curve trajectory in the unit cross-section. Still further, regarding the rolling contact assembly 12, the moving roller 121 can be supported and matched with the circumferential surface contour of the profiling arm 8, and during the movement along the circumferential surface of the profiling arm 8, the rolling roller 122 is kept at a fixed theoretical distance and contact pressure from the inner surface of the pneumatic tire 16. In this case, when the rolling roller 122 contacts the inner surface of the pneumatic tire 16, the two displacement sensors 2 at its shaft end maintain the initial displacement data. Once the rolling roller 122 passes through the position with bulges and cracks, the detection end of the displacement sensor 2 will generate the changed displacement data, and the changed displacement data is fed back to the controller through the transmission line, and the controller records the tires with surface defects. Since the workshop is also provided with equipment for the pneumatic tire 16 to complete rolling at the detection station of the pneumatic tire 16, on the basis that the pneumatic tire 16 continuously rolls for one week, the working surface of the rolling roller 122 basically fully covers the inner surface of the pneumatic tire 16, and the displacement sensor 2 obtains the corresponding surface data, thereby completing the detection of bulges and cracks. This device is reasonably designed, adopts contact detection, has comprehensive detection, is beneficial to reducing the probability of missed detection and misdetection, is beneficial to improving the detection efficiency, and can meet the needs of the industrial production line.

[0044] Such as Figure 4 , Figure 6 and Figure 7As shown in the figure, the combined drive belt 9 includes a belt 91 and a copper belt 92. The cross-section of the belt 91 is cruciform and the cross-section of the copper belt 92 is linear. A pair of clamping plates 81 for clamping the belt 91 are arranged on the inner peripheral surface of the profiling arm 8. The clamping plates 81 are L-shaped. A drive groove 82 with a T-shaped cross-section is arranged on the outer peripheral surface of the profiling arm 8. The groove surface of the drive groove 82 is for the copper belt 92 to move. A belt track 83 for the belt 91 to make circumferential displacement is formed between the drive groove 82 and the clamping plates 81. The belt 91, the copper belt 92 and the rolling contact assembly 12 are synchronously connected. Among them, the cross-section designs of the belt 91 and the copper belt 92 can ensure the stability of their transmission actions in the drive groove 82 and the belt track 83. And the belt track 83 is used to limit the movement path of the belt 91. On the basis of the synchronous connection between the belt 91 and the copper belt 92, the copper belt 92 provides a relatively reliable connection basis for connecting the rolling contact assembly 12 and maintains a certain flexibility to meet the continuity and smoothness of all the rolling contact assemblies 12 making stepping actions along the outer peripheral surface of the profiling arm 8.

[0045] As Figures 4-6 shown, the drive gear set 103 group 10 includes a rubber soft rack 101 connected to the copper belt 92. An external gear ring 102 is arranged on the transmission side of the rubber soft rack 101. Two gears 103 which are symmetrically distributed and meshed with the external gear ring 102 are arranged between the two pairs of connecting arms 7. A wheel shaft 104 is arranged at the center of the gear 103. The wheel shaft 104 is axially connected to the connecting arm 7 and the bow-shaped arm 5. An end cap 105 is arranged at the end of the wheel shaft 104. The end caps 105 on the same axis are used to reduce the axial movement length of the wheel shaft 104. A servo motor 13 is arranged at the end of one of the wheel shafts 104. Among them, in order to ensure the detection efficiency, the number of distributed rolling contact assemblies 12 basically covers the overlapping projection range of the profiling arm 8 and the pneumatic tire 16. For compensating the missing projection length, it is only necessary to drive the combined drive belt 9 to make a stepping action of about 3 - 5 cm through the servo motor 13. And the working length of the rubber soft rack 101 provides the longest stepping distance limit for the rolling contact assemblies 12, thereby effectively meeting the needs of the present invention for detecting the inner surface of the pneumatic tire 16. The servo motor 13 can drive the gear 103 to rotate to drive the external gear ring 102 to rotate, and the external gear ring 102 can drive the rubber soft rack 101 to generate a moving action; furthermore, the upper and lower pair of gears 103 can play a role in driving and supporting the external gear ring 102. And because the external gear ring 102 has a certain rigidity, during the process of its connection and meshing with the transmission working surface of the rubber soft rack 101, the rubber soft rack 101 can be kept with a relatively high moving stability, thereby ensuring the detection performance of the rolling contact assembly 12.

[0046] Furthermore, the outer gear ring 102 is in a C-shaped structure and its C-shaped opening faces the execution end of the ZR actuator 3. An end plate 106 is provided at the end of the C-shaped opening of the outer gear ring 102, and the radial height of the end plate 106 is greater than the tooth top height of the outer gear ring 102. Designing the outer gear ring 102 as a C-shaped structure can, on the one hand, make reasonable assembly space for the support arm 6, the Y-shaped arm 4 and the ZR actuator 3, and avoid the stepping range of the outer gear ring 102 from interfering with other structures, and on the other hand, it can also save a considerable amount of material costs. The end plates 106 structure provided at both ends of the outer gear ring 102 can play a limiting role, avoiding the excessive stepping length of the outer gear ring 102 causing the rubber soft rack 101 to have a springboard situation, which is beneficial to ensure the transmission quality of the rubber soft rack 101 and the combined transmission belt 9 to the rolling contact component 12.

[0047] like Figure 4 and Figure 5 As shown, two inner pipes for passing the transmission hose 11 are arranged in parallel inside the rubber soft rack 101, two outer pipes 14 connected with the transmission hose 11 are arranged on both sides of the rubber soft rack 101, and the execution end of the Y-arm 4 and the ZR actuator 3 is provided with a hollow channel 15 for the outer pipe 14 to pass through. If the transmission hose 11 is passed through the rubber soft rack 101, on the one hand, the transmission hose 11 can be prevented from being twisted into the meshing range of the transmission gear 103 group 10, and on the other hand, the transmission path of the transmission hose 11 can be kept relatively uniform, and the rolling contact assembly 12 can be prevented from shaking significantly at the node of the moving turning point.

[0048] like Figures 6-11As shown, the rolling contact assembly 12 includes a spacer 123. The spacer 123 includes an I-shaped connecting plate 1231. At the bottom of the connecting plate 1231, there are a pair of connecting holes 1232, and screws for installing and connecting the belt 91, copper belt 92 and the rolling contact assembly 12 are used in the connecting holes 1232. At the top of the connecting plate 1231, there are a pair of through pipes 1233 for penetrating the transmission hose 11. At both ends of the through pipe 1233, there are sunk openings 1234, and the sunk openings 1234 correspond to the guide pipes 124 provided at the bottom of the moving roller 121. A flexible connecting spring 125 is provided in the guide pipe 124 and the sunk opening 1234. Among them, the spacer 123 plays a role in connecting the snake joints. After the connecting plate 1231 and the copper belt 92 establish a synchronous connection relationship, it basically limits the maximum elastic displacement length of the moving roller 121. On the premise of ensuring the effective connection of the transmission hose 11, the through pipe 1233 also serves as an end support structure for the flexible connecting spring 125, enabling the flexible connecting spring 125 to be effectively maintained between the guide pipe 124 and the spacers 123 at both ends thereof. Thus, the rolling contact assembly 12 can have a certain flexibility, so as to complete a flexible transition on the curved circumferential surface of the profiling arm 8 under the driving action of the combined drive belt 9, and further ensure the contact effect between the rolling contact assembly 12 and the inner surface of the pneumatic tire 16.

[0049] In order to improve the moving flexibility of adjacent rolling contact assemblies 12, both ends of the guide pipe 124 provided in the present invention are in an eight-shaped configuration, and both ends of the through pipe 1233 are in a V-shaped configuration. By respectively adopting the eight-shaped and V-shaped designs for the guide pipe 124 and the through pipe 1233, not only a reasonable compression deformation space is provided for the flexible connecting spring 125, but also sufficient bending allowance is provided for the rolling contact assembly 12 when passing through the curved surface turning position, thereby improving the smoothness of the rolling contact assembly 12 when passing through the convex surface and concave surface positions.

[0050] In order to improve the cooperation effect between the rolling roller 122 and the displacement sensor 2, a support groove 1211 for the rolling roller 122 to roll is provided on the moving roller 121. At both ends of the support groove 1211, there are guide grooves 1212 for the shaft ends of the rolling roller 122 to make radial displacement. At the bottom of the guide groove 1212, there is a return spring 126 for supporting the shaft end of the rolling roller 122. The detection end of the displacement sensor 2 is connected from the center of the return spring 126 to the shaft end of the rolling roller 122. Among them, the support groove 1211 provides a compression and retraction allowance for the rolling roller 122, the guide groove 1212 provides a radial displacement length for the shaft end of the rolling roller 122, and the return spring 126 makes the roller surface of the rolling roller 122 always maintain the contact effect with its detection surface, so that the displacement sensor 2 can express the displacement situation of the rolling roller 122 in real time, and then feedback the problems of bulges and cracks that occur.

[0051] In order to improve the detection performance of the rolling roller 122, the rolling roller 122 provided by the present invention includes a left roller 1221 and a right roller 1222. The opposite ends of the left roller 1221 and the right roller 1222 are matched with the guide grooves 1212. The opposite ends of the left roller 1221 facing the right roller 1222 are respectively provided with a tenon 1223 and a kidney-shaped shaft eye 1224. The kidney-shaped shaft eye 1224 allows the tenon 1223 to slide radially. The opposite ends of the left roller 1221 and the right roller 1222 are both provided with tapered extrusion mating surfaces 1225. The extrusion mating surfaces 1225 can cause a V-shaped angle to be generated between the left roller 1221 and the right roller 1222 at the moment of contacting the undulating surface. In this way, the displacement situation of the rolling rollers 122 located on the same installation curved surface can be reflected as the approximate length of the crack. By separating the rolling roller 122 into the left roller 1221 and the right roller 1222, in addition to improving the detection sensitivity of the rolling, it can also feedback the approximate width of the crack through the displacement detection situation within the left and right ranges, enrich the detection data of this equipment, and improve the detection efficiency of the pneumatic tire 16.

[0052] As Figure 6 shown, a plurality of welding pipes 84 are provided on the side surface of the profiling arm 8. The welding pipes 84 are distributed at the turning nodes of the profiling arm 8. A crank lever 85 is provided on the welding pipe 84, and a friction roller 86 is provided on the crank lever 85. The friction roller 86 is in frictional transmission with the belt surface of the combined transmission belt 9 and is used to prevent the combined transmission belt 9 from jumping. The welding pipe 84, the crank lever 85, and the friction roller 86 can form an anti-jump assembly. By distributing the anti-jump assembly at the curved surface turning position of the profiling arm 8, the transmission quality of the combined transmission belt 9 can be improved, and to a certain extent, the rolling contact performance of the rolling contact assembly 12 can be improved, which is beneficial to ensuring the sensitivity and accuracy of the detection performance of the displacement sensor 2.

[0053] The above are only the preferred embodiments of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A measuring device for detecting the inner surface of an inflated tire, comprising a detection center frame and a displacement sensor, wherein the detection center frame is used to arrange detection sites from the central position of the inflated tire, and is characterized in that, A ZR actuator capable of performing telescopic and rotational movements is provided on the detection steady rest. The actuator end of the ZR actuator faces the inner surface direction of the pneumatic tire, and a Y-shaped arm is provided. A pair of bow-shaped arms are provided at the end of the Y-shaped arm away from the ZR actuator. A support arm for controlling the distance between the two bow-shaped arms is provided between the bow-shaped arms. Two pairs of connecting arms are provided at both ends of the two bow-shaped arms. The two pairs of connecting arms are provided on a profiling arm. The perimeter profile of the profiling arm matches the cross-sectional profile of the pneumatic tire. A week of combined drive belts is provided on the circumferential surface of the profiling arm. A drive gear set for driving the combined drive belt to move along the perimeter direction of the profiling arm is provided between the connecting arm and the profiling arm. A pair of drive hoses that move synchronously with the combined drive belt are provided on the combined drive belt. A plurality of rolling contact components that are sequentially distributed front and back and are used to elastically contact the inner surface of the pneumatic tire are provided on the drive hose. The rolling contact component includes a moving roller, and a rolling roller is provided on the moving roller. A pair of displacement sensors that contact and cooperate with both ends of the rolling roller are provided inside the rolling contact component. A transmission line for electrically connecting with the displacement sensor is provided inside the drive hose. A controller is provided at the transmission terminal of the transmission line.

2. The measuring device for detecting the inner surface of an inflated tire according to claim 1, characterized in that, The combined drive belt includes a belt and a copper strip. The cross-section of the belt and the cross-section of the copper strip are cross-shaped and linear respectively. A pair of clamping plates for clamping the belt are provided on the inner circumferential surface of the profiling arm. The clamping plates are L-shaped. A week of drive grooves with a T-shaped cross-section is provided on the outer circumferential surface of the profiling arm. The groove surface of the drive groove is for the copper strip to move. A belt track for the belt to perform circumferential displacement is formed between the drive groove and the clamping plate. The belt, the copper strip and the rolling contact components are synchronously connected.

3. The measuring device for detecting the inner surface of an inflated tire according to claim 2, characterized in that, The drive gear set includes a rubber soft rack connected to the copper strip. An external gear ring is provided on the driving side of the rubber soft rack. Two symmetrically distributed gears that mesh with the external gear ring are provided between the two pairs of connecting arms. A wheel shaft is provided at the center of the gear. The wheel shaft is axially connected to the connecting arm and the bow-shaped arm. An end cap is provided at the end of the wheel shaft. A servo motor is provided at the end of one of the wheel shafts.

4. A measuring device for detecting the inner surface of an inflated tire according to claim 3, characterized in that, The external gear ring is in a C-shaped structure, and the C-shaped opening faces the actuator end of the ZR actuator. An end plate is provided at the end of the C-shaped opening of the external gear ring. The radial height of the end plate is greater than the tooth tip height of the external gear ring.

5. A measuring device for detecting the inner surface of an inflated tire according to claim 4, characterized in that, Two inner pipes for passing through the drive hose are arranged in parallel inside the rubber soft rack. Two outer pipes communicating with the drive hose are provided on both sides of the rubber soft rack. Hollow holes for the outer pipes to pass through are provided at the actuator end of the Y-shaped arm and the ZR actuator.

6. The measuring device for detecting the inner surface of an inflated tire according to claim 1, characterized in that, The rolling contact component includes a spacer. The spacer includes an I-shaped connecting plate. A pair of connecting holes are provided at the bottom of the connecting plate. Screws for connecting the belt, the copper strip and the rolling contact components are installed in the connecting holes. A pair of middle-through pipes for passing through the drive hose are provided at the top of the connecting plate. Sunk openings are provided at both ends of the middle-through pipe. The sunk openings correspond to the guide pipes provided at the bottom of the moving roller. Flexible connecting springs are provided in the guide pipes and the sunk openings.

7. A measuring device for detecting the inner surface of an inflated tire according to claim 6, characterized in that, Both ends of the guiding tube are in a flared shape, and both ends of the through tube are in a V shape.

8. A measuring device for detecting the inner surface of an inflated tire according to claim 1 or 7, characterized in that, A support groove for the rolling roller to roll is provided on the moving roller. Guide grooves for the axial ends of the rolling roller to make radial displacement are provided at both ends of the support groove. A return spring for supporting the axial ends of the rolling roller is provided at the bottom of the guide groove. The detection end of the displacement sensor is connected from the center of the return spring to the axial end of the rolling roller.

9. A measuring device for detecting the inner surface of an inflated tire according to claim 8, characterized in that, The rolling roller includes a left roller and a right roller. The opposite ends of the left roller and the right roller cooperate with the guide grooves. Tenons and kidney-shaped shaft eyes are respectively provided at the opposite ends of the left roller facing the right roller. The kidney-shaped shaft eyes allow the tenons to slide radially. Tapered extrusion mating surfaces are provided at the opposite ends of the left roller and the right roller.

10. A measuring device for detecting the inner surface of an inflated tire according to claim 1, characterized in that, A plurality of welding tubes are provided on the side surface of the profiling arm. The welding tubes are distributed at the turning nodes of the profiling arm. A crank lever is provided on the welding tube. A friction roller is provided on the crank lever. The friction roller is in frictional transmission with the belt surface of the combined transmission belt and is used to prevent the combined transmission belt from jumping.

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