A kind of bead wire adhesion force test mechanism

Abstract

The present application relates to the technical field of bead wire detection, in particular to a kind of bead wire adhesion testing mechanism, including the traction unit for the traction of bead wire conveying and the resistance unit for providing resistance for the conveying work of bead wire;The traction unit includes rotating column, motor for the rotating column provides power and side pressure group used with the rotating column, and bead wire is spirally wound on the rotating column;By adopting the way of continuous traction and reverse pulling, two forces opposite in direction are provided to the steel wire body inside bead wire and the rubber layer on its surface, so that the detection of the adhesion of bead wire can be realized, and the dynamic and comprehensive detection effect of bead wire can be realized by keeping bead wire in conveying state, and the mechanism can be integrated into production line, improve the continuity of detection, avoid material waste when sampling detection.

Description

Technical Field

[0001] This invention relates to the technical field of tire bead wire testing, and in particular to a tire bead wire adhesion testing mechanism. Background Technology

[0002] The bead wire is a key skeleton material in the bead area of ​​radial tires. Its surface is usually covered with a layer of rubber. Through a vulcanization process, a strong chemical and physical bond is formed between the rubber and the surface of the wire, thereby ensuring that the wire bead and the rubber matrix do not slip relative to each other during tire inflation and driving. Therefore, the bonding strength between the wire and the rubber layer directly determines the safety and service life of the tire.

[0003] In existing technologies, adhesion testing generally employs an offline sampling method. The specific operation involves cutting a section of tire bead wire sample with a rubber layer on its surface from the production line or finished product. Using a peeling tool or chemical reagent, the rubber layer at one end of the sample is removed, exposing a certain length of steel wire. Subsequently, the exposed steel wire is clamped in a first clamp, and the rubber layer is clamped in a second clamp. The two clamps are driven to separate axially, causing the steel wire to be gradually pulled out of the rubber layer. The maximum tensile force during the process of the steel wire separating from the rubber layer is recorded by a force sensor, which is the adhesion force of the sample.

[0004] However, this traditional testing method is a destructive sampling inspection, which can only be used to inspect batches of products. It cannot achieve online and comprehensive inspection of tire bead wires. In addition, the operation steps are cumbersome and the inspection efficiency is low because it requires peeling off the rubber layer and clamping. Furthermore, the steel wire segment being tested is scrap after the inspection is completed and cannot be reused, which easily leads to material waste. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a tire bead wire adhesion force testing mechanism, the specific technical solution of which is as follows: The present invention provides a tire bead wire adhesion force testing mechanism, comprising a traction unit for conveying the tire bead wire and a resistance unit for providing resistance to the conveying of the tire bead wire. The traction unit includes a rotating column, a motor that provides power to the rotating column, and a side pressure assembly that works in conjunction with the rotating column. The bead wire is spirally wound on the rotating column, and the side pressure assembly is used to compress the bead wire on the rotating column. The resistance unit includes two conveyor wheels located on both sides of the bead wire and pressing the bead wire, and a damping structure for providing resistance to the rotation of the conveyor wheels.

[0006] Furthermore, a spiral groove is provided on the outer wall of the rotating column, and the groove shape of the spiral groove is used in conjunction with the tire bead wire; The traction unit also includes two upright plates arranged opposite each other along the axis of the rotating column. The two upright plates are located on both sides of the tire bead wire. The upright plates are provided with threaded holes, through which the rotating column passes, and the spiral groove on the rotating column cooperates with the threaded holes.

[0007] Furthermore, the side pressure assembly includes a support plate, a plurality of conveying rollers rotatably mounted on the support plate, a pressure belt driven on the plurality of conveying rollers, a support frame fixed relative to the support plate, and a propulsion cylinder providing moving power to the support frame. The portion of the pressure belt between the two conveying rollers on the support plate is arc-shaped and squeezes the tire bead wire wound on the rotating column.

[0008] Furthermore, the resistance unit also includes a base plate, and the conveying wheel is rotatably mounted on the base plate; The damping structure includes two conical wheels and two conical wheels connected to the two conical wheels. The two conical wheels are connected to the two conveying wheels. One conical wheel is equipped with a drive shaft, and the other conical wheel is equipped with a drive sleeve. The drive sleeve is rotatably mounted on the drive shaft. A rotating cylinder is mounted on the drive sleeve. Several magnets are mounted on the inner wall of the rotating cylinder. A core column is mounted at the end of the drive shaft. The core column is located inside the rotating cylinder, and several coils are mounted on the outer wall of the core column. The coils are used in conjunction with the magnets.

[0009] Furthermore, one end of the core column is slidably inserted into the drive shaft, and the other end of the core column is provided with a movable frame, and the core column can rotate on the movable frame. The movable frame is adjusted in position on the base plate by bolts.

[0010] Furthermore, the U-shaped inner wall of the conveyor wheel is provided with several pressure ridges.

[0011] Furthermore, the resistance unit also includes a detection group disposed on the base plate. The detection group includes a movable stage, two conveyor wheels rotatably disposed on the movable stage, and a force gauge disposed on the base plate. The movable stage is slidably disposed on the base plate, and the movable stage and the force gauge are connected by a spring. The two conveyor wheels clamp the tire bead wire. One of the conveyor wheels rotates at the same speed as the other conveyor wheel.

[0012] Furthermore, a side support plate is provided on the side wall of the upright plate, the bottom plate is slidably mounted on the side support plate, and the support frame and the bottom plate are rotatably connected by an inclined connecting arm.

[0013] The beneficial effects of this invention are as follows: By employing continuous traction and reverse pulling to apply two opposing forces to the steel wire body inside the bead wire and its surface rubber layer, the adhesive force of the bead wire can be detected. Furthermore, by keeping the bead wire continuously in a conveying state, dynamic and comprehensive testing of the bead wire can be achieved. This also facilitates the integration of the mechanism into the production line, improving the continuity of testing and avoiding material waste during sampling and testing. By winding the bead wire around the rotating column and squeezing the bead wire on the rotating column by the side pressure group, effective and continuous traction of the inner layer of the bead wire body can be achieved. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of a tire bead wire adhesion force testing mechanism; Figure 2 for Figure 1 Schematic diagram of the structure of the intermediate traction unit; Figure 3 for Figure 1 Schematic diagram of the structure of the medium resistance unit; Figure 4 for Figure 2 Schematic diagram of the middle side pressure assembly; Figure 5 for Figure 3 A schematic diagram of the conveyor wheel and damping structure; Figure 6 for Figure 5 Schematic diagram of a medium-damping structure; Figure 7 for Figure 3 Schematic diagram of the structure of the detection group; Figure label: 1. Tire bead wire; 2. Traction unit; 3. Resistance unit; 4. Rotating column; 5. Motor; 6. Side pressure assembly; 7. Conveyor wheel one; 8. Damping structure; 9. Vertical plate; 10. Support plate; 11. Conveyor roller; 12. Pressure belt; 13. Support frame; 14. Propulsion cylinder; 15. Base plate; 16. Conical wheel one; 17. Conical wheel two; 18. Drive shaft; 19. Drive sleeve; 20. Rotating drum; 21. Magnet; 22. Core column; 23. Coil; 24. Movable frame; 25. Pressure ridge; 26. Detection assembly; 27. Moving table; 28. Conveyor wheel two; 29. ​​Force gauge; 30. Spring; 31. Conical wheel three; 32. Prism; 33. Conical wheel four; 34. Conical wheel five; 35. Side support plate; 36. Connecting arm; 37. Sliding column. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0019] like Figures 1 to 7 As shown, a tire bead wire adhesion force testing mechanism of the present invention includes a traction unit 2 for conveying the tire bead wire 1 and a resistance unit 3 for providing resistance to the conveying operation of the tire bead wire 1. The traction unit 2 includes a rotating column 4, a motor 5 that provides power to the rotating column 4, and a side pressure assembly 6 that works in conjunction with the rotating column 4. The bead wire 1 is spirally wound on the rotating column 4, and the side pressure assembly 6 is used to squeeze the bead wire 1 on the rotating column 4. The resistance unit 3 includes two conveyor wheels 7 located on both sides of the bead wire 1 and pressing the bead wire 1, and a damping structure 8 for providing resistance to the rotation of the conveyor wheels 7.

[0020] In this invention, the traction unit 2 and the resistance unit 3 provide opposite forces to the bead wire 1. The force provided by the traction unit 2 to the bead wire 1 is mainly concentrated on the inner steel wire body of the bead wire 1, while the force provided by the resistance unit 3 to the bead wire 1 is mainly concentrated on the rubber layer on the surface of the bead wire 1. By utilizing the deformable characteristics of the rubber layer itself, bidirectional tension is achieved on both the steel wire body and the rubber layer, thus enabling the detection of the bead wire 1. Since the traction unit 2 can continuously pull and transport the bead wire 1, while the resistance unit 3 only provides resistance to the bead wire 1, continuous tension detection of the bead wire 1 can be achieved under continuous transport conditions. This facilitates online detection of the bead wire 1, makes it easy to integrate the detection mechanism into the production line, and enables comprehensive detection of the bead wire 1.

[0021] Specifically, the motor 5 in the traction unit 2 provides rotational power to the rotating column 4, and the bead wire 1 can be wound multiple times on the rotating column 4. Combined with the compression of the multiple turns of bead wire 1 on the rotating column 4 by the side pressure group 6, a firm connection can be achieved between the rotating column 4 and the inner steel wire body of the bead wire 1. At the same time, when the rotating column 4 rotates, the rotating column 4 can continuously pull and transport the bead wire 1. At this time, the traction unit 2 can effectively transfer the traction force to the steel wire body. The two conveying wheels 7 in the resistance unit 3 can clamp the bead wire 1. Since the clamping position is located on the surface of the bead wire 1, the frictional force between the conveying wheel 7 and the bead wire 1 is mainly concentrated on the rubber layer on the surface of the bead wire 1. In this way, the traction unit 2 and the resistance unit 3 can provide force to the inner steel wire body and the rubber layer on the surface of the bead wire 1, respectively.

[0022] In use, motor 5 drives rotating column 4 to rotate. Rotating column 4 utilizes the winding characteristics of bead wire 1 and the squeezing of bead wire 1 by side pressure group 6 to continuously traction and convey bead wire 1. Bead wire 1 uses friction to drive conveyor wheel 7 to rotate. Damping structure 8 provides damping force to conveyor wheel 7, thereby providing damping force to the rubber layer on the surface of bead wire 1. When bead wire 1 can be conveyed normally, the adhesion of bead wire 1 meets the specified requirements. When the rotation speed of conveyor wheel 7 decreases, the diameter of the rubber layer on the surface of bead wire 1 between conveyor wheel 7 and rotating column 4 becomes smaller, or wrinkles appear on the rubber layer on the side of bead wire 1 away from rotating column 4, the steel wire body inside bead wire 1 separates from the rubber layer on its surface. At this time, the adhesion of that section of bead wire 1 is unqualified.

[0023] By employing continuous traction and reverse pulling to provide two opposing forces to the steel wire body inside the bead wire 1 and its surface rubber layer, the adhesive force of the bead wire 1 can be detected. Furthermore, by keeping the bead wire 1 in a continuous conveying state, dynamic and comprehensive detection of the bead wire 1 can be achieved. This also facilitates the integration of the mechanism into the production line, improves the continuity of detection, simplifies the operation, and avoids material waste during sampling and testing. By winding the bead wire 1 around the rotating column 4 and squeezing the bead wire 1 on the rotating column 4 by the side pressure group 6, effective and continuous traction of the inner steel wire body of the bead wire 1 can be achieved.

[0024] Furthermore, a spiral groove is provided on the outer wall of the rotating column 4, and the groove shape of the spiral groove is used in conjunction with the tire bead wire 1; The traction unit 2 also includes two upright plates 9 arranged opposite each other along the axis of the rotating column 4. The two upright plates 9 are located on both sides of the tire bead wire 1. Threaded holes are opened on the upright plates 9, through which the rotating column 4 passes, and the spiral groove on the rotating column 4 is used in conjunction with the threaded hole.

[0025] The cross-section of the spiral groove is arc-shaped, and its diameter is equal to that of the bead wire 1. When the bead wire 1 is wound in the spiral groove, there is a large contact area between the spiral groove and the bead wire 1, thereby improving the traction effect of the traction unit 2 on the bead wire 1 and avoiding slippage. At the same time, it avoids the traction unit 2 applying the traction force only to the rubber layer on the surface of the bead wire 1, which would reduce the traction capacity of the traction unit 2 on the bead wire 1, cause misalignment between the rubber layer and the wire body of the bead wire 1, and thus make it impossible to effectively detect the adhesion of the bead wire 1.

[0026] Because the bead wire 1 is spirally wound on the rotating column 4, when the rotating column 4 rotates, the bead wire 1 on the rotating column 4 will be continuously released outward, and new bead wire 1 will be continuously wound on the rotating column 4. If the rotating column 4 is stationary, the newly wound bead wire 1 will gather together and overlap, causing the multiple turns of bead wire 1 on the rotating column 4 to press against each other. By using the interaction between the rotating column 4 and the vertical plate 9 through the spiral groove and threaded hole, when the rotating column 4 rotates, it will pass through the vertical plate 9 and move laterally. At this time, the bead wire 1 will be continuously wound on the rotating column 4 along the spiral groove trajectory, so that the multiple turns of bead wire 1 on the rotating column 4 can be arranged along the axis of the rotating column 4, which facilitates the release of subsequent bead wire 1, avoids the bead wire 1 overlapping, improves the stability of bead wire 1 conveying, and the multi-turn arrangement of bead wire 1 can better cooperate with the side pressure group 6.

[0027] Since the rotating column 4 can move along its own axis, it can drive the motor 5 to move synchronously. In some embodiments, since the motor 5 needs to be installed on an external workbench, frame or other structure, the position of the motor 5 is fixed. In this case, a sliding column 37 can be set at the output end of the motor 5. The sliding column 37 is coaxial with the rotating column 4 and slides into the rotating column 4. This allows the motor 5 to drive the rotating column 4 to rotate through the sliding column 37, and the movement of the rotating column 4 no longer interferes with the motor 5.

[0028] Furthermore, the side pressure assembly 6 includes a support plate 10, a plurality of conveying rollers 11 rotatably mounted on the support plate 10, a pressure belt 12 driven on the plurality of conveying rollers 11, a support frame 13 fixed relative to the support plate 10, and a propulsion cylinder 14 that provides moving power to the support frame 13. The portion of the pressure belt 12 between the two conveying rollers 11 on the support plate 10 is arc-shaped and squeezes the tire bead wire 1 wound on the rotating column 4.

[0029] The support plate 10 can support a number of conveying rollers 11, and the support frame 13 can be connected to the support plate 10 or to a number of conveying rollers 11. Thus, the support plate 10, the conveying rollers 11 and the support frame 13 provide support for the pressure belt 12. The arc-shaped pressure belt 12 can squeeze a number of bead wires 1 on the rotating column 4, thereby making the side pressure group 6 and the bead wires 1 on the rotating column 4 have a large contact area. When the bead wires 1 are conveyed, the friction between the bead wires 1 and the pressure belt 12 can drive the pressure belt 12 to move on the number of conveying rollers 11. The propulsion cylinder 14 can provide force to the pressure belt 12, thereby squeezing the pressure belt 12 onto the rotating column 4.

[0030] In some embodiments, the pressure band 12 may consist of an inner steel strip layer and an outer rubber layer, which facilitates a larger contact area between the pressure band 12 and the bead wire 1.

[0031] Furthermore, the resistance unit 3 also includes a base plate 15, on which the conveyor wheel 7 is rotatably mounted; The damping structure 8 includes two conical wheels 16 and two conical wheels 17 that are respectively driven by the two conical wheels 16. The two conical wheels 16 are respectively driven by the two conveying wheels 7. A drive shaft 18 is provided on one conical wheel 17 and a drive sleeve 19 is provided on the other conical wheel 17. The drive sleeve 19 is rotatably sleeved on the drive shaft 18. A rotating cylinder 20 is provided on the drive sleeve 19. Several magnets 21 are provided on the inner wall of the rotating cylinder 20. A core column 22 is provided at the end of the drive shaft 18. The core column 22 is located inside the rotating cylinder 20, and several coils 23 are provided on the outer wall of the core column 22. The coils 23 are used in conjunction with the magnets 21.

[0032] like Figure 3 , Figure 5 and Figure 6As shown, the base plate 15 provides support for the conveyor wheel 7 and the damping structure 8 on it. The conveyor wheel 7, the cone wheel 16, the cone wheel 17, the drive shaft 18, and the drive sleeve 19 are all rotatably mounted on the base plate 15. The coil 23 is connected to an external detector. When the tire bead wire 1 drives the two conveyor wheels 7 to rotate synchronously relative to each other using friction, the two cone wheels 17 rotate synchronously relative to each other. The two cone wheels 17 drive the drive shaft 18 and the drive sleeve 19 to rotate synchronously relative to each other, thereby driving several magnets 21 and the coil 23 to rotate synchronously relative to each other through the rotating drum 20 and the core column 22. The coil 23 cuts the magnetic field lines around the magnet 21 and generates current. The detector can measure the damping force provided by the conveyor wheel 7 to the tire bead wire 1 by measuring the current and voltage in the coil 23, which facilitates the detection of the force applied during the measurement of the tire bead wire 1.

[0033] Since the two conveyor wheels 7 drive the magnet 21 and the coil 23 to rotate synchronously in opposite directions, the relative speed of the magnet 21 and the coil 23 will be higher, and the detection sensitivity will be higher.

[0034] Furthermore, one end of the core column 22 is slidably inserted into the drive shaft 18, and the other end of the core column 22 is provided with a movable frame 24, and the core column 22 can rotate on the movable frame 24. The movable frame 24 is adjusted on the base plate 15 by bolts.

[0035] The movable frame 24 can be fastened to the base plate 15 with bolts. When it is necessary to adjust the position of the coil 23, the bolts can be loosened and the movable frame 24 can be pushed to move. The movable frame 24 can push the core column 22 to slide on the drive shaft 18. At the same time, the overlapping area of ​​the coil 23 and the magnet 21 changes, thereby adjusting the area of ​​the magnetic field cut by the coil 23 when it rotates, thereby adjusting the magnitude of the damping force provided by the damping structure 8 to the tire bead wire 1.

[0036] Furthermore, several pressure ridges 25 are provided on the U-shaped inner wall of the conveyor wheel 7.

[0037] Since the force provided by the conveyor wheel 7 to the bead wire 1 is mainly concentrated on the rubber layer on the surface of the bead wire 1, the friction between the conveyor wheel 7 and the rubber layer on the surface of the bead wire 1 can be increased by setting several pressure ridges 25 on the conveyor wheel 7. The pressure ridges 25 can also make the conveyor wheel 7 extrude embossing on the rubber layer on the surface of the bead wire 1. Using these embossing, the damping force provided by the conveyor wheel 7 to the rubber layer can be directed along the axis of the bead wire 1, thereby improving the effectiveness of force transmission between the conveyor wheel 7 and the rubber layer, reducing the extrusion force of the conveyor wheel 7 on the bead wire 1, and thus reducing the force of the conveyor wheel 7 on the inner steel wire body of the bead wire 1, and improving the accuracy of adhesive force measurement.

[0038] Furthermore, the resistance unit 3 also includes a detection group 26 disposed on the base plate 15. The detection group 26 includes a moving platform 27, two conveyor wheels 28 rotatably disposed on the moving platform 27, and a force gauge 29 disposed on the base plate 15. The moving platform 27 is slidably disposed on the base plate 15, and the moving platform 27 and the force gauge 29 are connected by a spring 30. The two conveyor wheels 28 clamp the tire bead wire 1. Among them, one conveyor wheel 28 rotates at the same speed as one conveyor wheel 7.

[0039] The second conveyor wheel 28 and the corresponding first conveyor wheel 7 can transmit power through a transmission structure, enabling the second conveyor wheel 28 and the first conveyor wheel 7 to rotate at the same speed. The two second conveyor wheels 28 clamp the tire bead wire 1. The spring 30 provides an elastic force to the moving platform 27, positioning the moving platform 27 at one end of its travel on the base plate 15. The force gauge 29 can detect the elastic force value of the spring 30. When the steel wire body inside the tire bead wire 1 separates from the rubber layer on the surface of the tire bead wire 1 and moves relative to it, the first conveyor wheel 7... The rotational speed decreases due to the damping structure 8. At this time, the rotational speed of the second conveyor wheel 28 decreases synchronously. Since the speed at which the traction unit 2 pulls the bead wire 1 is constant, the intact bead wire 1 near the detection group 26 will use friction to drive the second conveyor wheel 28 to move towards the traction unit 2. At this time, the moving table 27 slides on the base plate 15, the spring 30 is compressed, and the force gauge 29 detects that the elastic force of the spring 30 has increased. Using this mode, it is possible to quickly detect when the adhesion of the bead wire 1 is unqualified.

[0040] like Figure 7 As shown, the transmission structure between conveyor wheel 28 and conveyor wheel 7 may include a cone wheel 31 that is driven by a cone wheel 2 17, a prism 32 mounted on the cone wheel 31, a cone wheel 4 33 mounted on the prism 32, and a cone wheel 5 34 that is driven by the conveyor wheel 28. The cone wheel 5 34 is driven by the cone wheel 4 33, and the prism 32 passes through the cone wheel 4 33 and can slide relative to it. The prism 32 and the cone wheel 4 33 rotate synchronously. The cone wheel 4 33 is rotatably mounted on the moving platform 27, and the cone wheel 31 is rotatably mounted on the base plate 15. Thus, when the cone wheel 2 17 rotates, the conveyor wheel 28 can be driven to rotate through the cone wheel 3 31, the prism 32, the cone wheel 4 33, and the cone wheel 5 34. Since the two conveyor wheels 28 clamp the tire bead wire 1, only one conveyor wheel 28 needs to be powered. When the moving platform 27 moves, the cone wheel 4 33 slides relative to the prism 32, and they still rotate synchronously.

[0041] Furthermore, a side support plate 35 is provided on the side wall of the upright plate 9, and the bottom plate 15 is slidably disposed on the side support plate 35. The support frame 13 and the bottom plate 15 are rotatably connected by an inclined connecting arm 36.

[0042] Because the length of the rotating column 4 is limited, it needs to move in the opposite direction after moving a specified distance to reset the rotating column 4. At this time, the tire bead wire 1 can stop being conveyed. The propulsion cylinder 14 on the side pressure group 6 pulls the pressure belt 12 away from the rotating column 4. The side pressure group 6 stops squeezing the tire bead wire 1. The support frame 13 can pull the base plate 15 closer to the traction unit 2 through the connecting arm 36. The base plate 15 slides on the side support plate 35, thereby making the tire bead wire 1 between the rotating column 4 and the conveyor wheel 7 in a relaxed state. The multiple turns of tire bead wire 1 wrapped on the rotating column 4 are relaxed and separated from the rotating column 4. The motor 5 runs in the opposite direction and drives the rotating column 4 to reset. Then the propulsion cylinder 14 pushes the pressure belt 12 to reset and squeezes the tire bead wire 1 on the rotating column 4 again. At the same time, the connecting arm 36 pushes the base plate 15 to reset, and the tire bead wire 1 between the conveyor wheel 7 and the rotating column 4 is straightened again.

[0043] In some embodiments, the bead wire 1 output by the traction unit 2 can be directly wound onto the external reel. When the rotating column 4 is reset, the external reel can rotate in the opposite direction at a certain angle, so that the bead wire 1 on the rotating column 4 is in a relaxed state, which can also help the rotating column 4 to reset. The two upright plates 9 can block and limit the multiple turns of bead wire 1 between them when the rotating column 4 is reset.

[0044] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tire bead wire adhesion force testing mechanism, characterized in that, It includes a traction unit for conveying the bead wire and a resistance unit for providing resistance to the conveying of the bead wire. The traction unit includes a rotating column, a motor that provides power to the rotating column, and a side pressure assembly that works in conjunction with the rotating column. The bead wire is spirally wound on the rotating column, and the side pressure assembly is used to compress the bead wire on the rotating column. The resistance unit includes two conveyor wheels located on both sides of the bead wire and pressing the bead wire, and a damping structure for providing resistance to the rotation of the conveyor wheels.

2. The tire bead wire adhesion force testing mechanism according to claim 1, characterized in that, The outer wall of the rotating column is provided with a spiral groove, and the groove shape of the spiral groove is used in conjunction with the tire bead wire; The traction unit also includes two upright plates arranged opposite each other along the axis of the rotating column. The two upright plates are located on both sides of the tire bead wire. The upright plates are provided with threaded holes, through which the rotating column passes, and the spiral groove on the rotating column cooperates with the threaded holes.

3. The tire bead wire adhesion force testing mechanism according to claim 2, characterized in that, The side pressure assembly includes a support plate, a plurality of conveying rollers rotatably mounted on the support plate, a pressure belt driven on the plurality of conveying rollers, a support frame fixed relative to the support plate, and a propulsion cylinder that provides moving power to the support frame. The portion of the pressure belt between the two conveying rollers on the support plate is arc-shaped and squeezes the tire bead wire wound on the rotating column.

4. The tire bead wire adhesion force testing mechanism according to claim 3, characterized in that, The resistance unit also includes a base plate, and the conveying wheel is rotatably mounted on the base plate; The damping structure includes two conical wheels and two conical wheels connected to the two conical wheels. The two conical wheels are connected to the two conveying wheels. One conical wheel is equipped with a drive shaft, and the other conical wheel is equipped with a drive sleeve. The drive sleeve is rotatably mounted on the drive shaft. A rotating cylinder is mounted on the drive sleeve. Several magnets are mounted on the inner wall of the rotating cylinder. A core column is mounted at the end of the drive shaft. The core column is located inside the rotating cylinder, and several coils are mounted on the outer wall of the core column. The coils are used in conjunction with the magnets.

5. The tire bead wire adhesion force testing mechanism according to claim 4, characterized in that, One end of the core column is slidably inserted into the drive shaft, and the other end of the core column is provided with a movable frame, and the core column can rotate on the movable frame. The movable frame is adjusted in position on the base plate by bolts.

6. The tire bead wire adhesion force testing mechanism according to claim 1, characterized in that, The U-shaped inner wall of the conveyor wheel is provided with several pressure ridges.

7. The tire bead wire adhesion force testing mechanism according to claim 4, characterized in that, The resistance unit also includes a detection group disposed on the base plate. The detection group includes a moving platform, a second conveyor wheel rotatably disposed on the moving platform, and a force gauge disposed on the base plate. The moving platform is slidably disposed on the base plate, and the moving platform and the force gauge are connected by a spring. The two second conveyor wheels clamp the tire bead wire. One of the conveyor wheels rotates at the same speed as the other conveyor wheel.

8. The tire bead wire adhesion force testing mechanism according to claim 4, characterized in that, The upright plate is provided with a side support plate on its side wall, the bottom plate is slidably mounted on the side support plate, and the support frame is rotatably connected to the bottom plate by an inclined connecting arm.

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