Tire bead ring strength testing device

Abstract

The invention relates to the technical field of tire steel wire ring testing, and discloses a tire steel wire ring strength testing device which comprises a base, a testing unit, two clamping units, two wire pressing units and two fixing units. The testing unit comprises a supporting frame fixedly installed on the top face of the base, two testing air cylinders are symmetrically and fixedly installed on the supporting frame, and supports are fixedly installed at the telescopic ends of the testing air cylinders. The clamping grooves with different inner diameters are designed to adapt to steel wires with different diameters, the rotating plates on the clamping plates are driven by the attraction magnetic force between the magnetic sheets to clamp and fix the steel wires, the steel wires with different specifications are rapidly and stably clamped, and due to the design, the working efficiency is improved, and the labor intensity of workers is reduced. And it is also ensured that in the steel wire testing and feeding process, a worker only needs to place the steel wire on the two clamping plates, feeding can be completed, the transferring plates and the clamping plates are automatically separated in the strength testing process, strength testing is facilitated, and the influence on the accuracy of the strength testing is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of tire bead testing, and particularly to a tire bead strength testing device. Background Art

[0002] A tire bead, also known as a bead wire or a tire bead wire, is a rigid ring made of rubber-coated wire (or copper-plated wire) arranged in a certain cross-sectional shape. It is an important part of a tire. The main function of a tire bead is to endow the bead with necessary strength and rigidity, so that the tire can be firmly attached to the rim. It is the main component for fixing the tire to the rim, ensuring the stability and safety of the tire during driving.

[0003] After retrieval, a Chinese patent with the publication number CN119246219B discloses a tire bead strength inspection device. By replacing the traditional direct clamping method with a coiling method, it greatly avoids the situation of fracture at the clamping part caused by excessive local stress in the traditional clamping test method, effectively alleviates the defect of wire stress concentration in the traditional clamping method, and makes the test results more accurate and reliable. However, when this solution is actually used, there are still the following deficiencies: When assembling and fixing a tire bead, the above device relies on manual operation or the use of a manipulator to complete the precise positioning and tensioning of the wire. However, both of these methods have significant limitations. When fixing the wire manually, due to the thinness and certain elasticity of the wire, the operation process is quite cumbersome and there are significant safety hazards. When the staff tightens the wire, they are easily injured due to the sudden rebound or slippage of the wire, which not only affects work efficiency but also poses a serious threat to the safety of the operator. On the other hand, although a manipulator can achieve high-precision operation and reduce the risk of human error and injury, its high manufacturing cost and maintenance cost make this solution economically unfeasible, especially for small and medium-sized enterprises, which are difficult to bear such an investment, thus restricting the wide promotion and application of the overall device.

[0004] Therefore, it is necessary to design a tire bead strength testing device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose a tire bead strength testing device.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: A tire bead strength testing device includes a base, a testing unit, two sets of clamping units, two sets of wire pressing units, and two sets of fixing units; Among them, the test unit includes a support frame fixedly installed on the top surface of the base. Two test cylinders are symmetrically and fixedly installed on the support frame. A bracket is fixedly installed at the telescopic end of the test cylinder. A fixed seat is fixedly installed on the inner wall of the bracket. The two groups of clamping units, wire pressing units, and fixing units respectively correspond to the two fixed seats; Among them, the clamping unit includes a guide rod fixedly installed on the inner wall of the support frame. A clamping plate is fixedly installed at the end of the guide rod. A guide ring is slidably sleeved on the guide rod. A first spring is arranged between the guide ring and the clamping plate. A rotating plate is rotatably installed on the side surface of the clamping plate. A connecting plate is fixedly installed on the side surface of the rotating plate. A chute is opened on the side surface of the connecting plate. A top plate is fixedly installed on the outer wall of the guide ring. The end of the top plate is slidably connected with the chute.

[0007] As a preferred technical solution of the present invention, both ends of the first spring are fixedly connected to the guide ring and the clamping plate respectively. A plurality of clamping grooves are opened on the side surface of the clamping plate.

[0008] As a preferred technical solution of the present invention, the wire pressing unit includes a rotating shaft rotatably installed on the side surface of the fixed seat. A transmission gear is fixedly sleeved on the outer wall of the rotating shaft. A fixed rack meshing with the transmission gear is fixedly installed on the inner wall of the support frame. A torsion spring is sleeved at the end of the rotating shaft. Both ends of the torsion spring are fixedly connected to the rotating shaft and the fixed seat respectively. A connecting frame is fixedly installed on the outer wall of the rotating shaft. A pressing roller is rotatably sleeved at the end of the connecting frame.

[0009] As a preferred technical solution of the present invention, the cross-sectional shape of the fixed seat is set to be semi-circular, and chamfering is performed at the corner of the fixed seat. The outer wall of the pressing roller is attached to the outer wall of the fixed seat.

[0010] As a preferred technical solution of the present invention, a support rod is fixedly installed on the outer wall of the guide ring. A first magnetic sheet is fixedly installed at the top end of the support rod. A fixed frame is fixedly installed on the side surface of the fixed seat. A second magnetic sheet is fixedly installed at the bottom end of the fixed frame. The opposite magnetic poles of the first magnetic sheet and the second magnetic sheet are opposite.

[0011] As a preferred technical solution of the present invention, the fixing unit includes two connecting rods symmetrically and fixedly installed on the outer wall of the fixed seat. A clamping seat is slidably installed on the connecting rods. A second spring with both ends fixedly connected to the connecting rods and the clamping seat respectively is sleeved on the connecting rods. A fixed frame is fixedly installed on the inner wall of the support frame. A connecting plate is fixedly installed on the side surface of the clamping seat. A transmission block is fixedly installed at the bottom surface of the end of the connecting plate.

[0012] As a preferred technical solution of the present invention, the end of the clamping seat away from the connecting plate is set to be arc-shaped adapted to the outer wall of the fixed seat. The cross-sectional shape of the transmission block is an isosceles trapezoid.

[0013] As a preferred technical solution of the present invention, a reminder unit adapted to the transmission block is provided on the inner wall of the support frame.

[0014] As a preferred technical solution of the present invention, the reminder unit includes a sliding plate slidably mounted on the inner wall of the fixed frame. An elastic airbag is provided between the sliding plate and the inner wall of the support frame. A conduit is fixedly mounted on the side of the support frame, and the end of the conduit communicates with the elastic airbag. An installation plate corresponding to the conduit is fixedly mounted on the side of the support frame. A plurality of alarm bells are arranged in a circular array on the bottom surface of the installation plate. A shaft rod is rotatably mounted on the bottom surface of the installation plate. A knocking rod adapted to the alarm bell is fixedly mounted on the outer wall of the shaft rod. A transmission structure is provided between the conduit and the shaft rod.

[0015] As a preferred technical solution of the present invention, the transmission structure includes a piston plate slidably mounted on the inner wall of the conduit. A push rod is fixedly mounted on the side of the piston plate. A spring three with both ends fixedly connected to the side of the piston plate and the inner wall of the conduit respectively is sleeved on the push rod. A linkage rack is fixedly mounted on the end of the push rod located outside the conduit. A linkage gear meshing with the linkage rack is fixedly mounted on the bottom end of the shaft rod.

[0016] The present invention has the following beneficial effects: 1. By providing a clamping unit, different inner diameters of the clamping grooves are designed to adapt to steel wires of different diameters, and the attracting magnetic force between the magnetic sheets is used to drive the rotating plate on the clamping plate to clamp and fix the steel wire, realizing the rapid and stable clamping of steel wires of different specifications. This design not only improves work efficiency but also ensures that during the test loading process, the staff only needs to place the steel wire on the two clamping plates to complete the loading, and during the strength test, the rotating plate automatically separates from the clamping plate to facilitate the strength test, avoiding affecting the accuracy of the strength test. 2. By providing a wire pressing unit, the transmission gear meshes with the fixed rack to drive the pressing roller to press the end of the steel wire, realizing the bending of the steel wire. At the same time, the corners of the fixed seat are chamfered to avoid the risk of the steel wire being damaged during the bending process. This design ensures the accuracy and safety of the steel wire bending, provides a good foundation for subsequent clamping and fixing and strength testing, and avoids the steel wire from breaking at the clamping and fixing position. 3. By providing a fixing unit, after the steel wire is bent, the spring is used to push the clamping seat to slide along the connecting rod towards the fixed seat, firmly fixing the end of the steel wire between the clamping seat and the fixed seat. This design not only improves the stability of the steel wire during the test but also avoids test errors caused by the steel wire loosening during the test. At the same time, the sliding design of the clamping seat also facilitates the staff to quickly remove the steel wire after the test is completed. 4. By setting up a reminder unit, before and after the test starts, the expansion and compression of the elastic airbag drive the piston plate to slide along the catheter, thereby driving the linkage gear, the shaft rod, and the knocking rod to rotate and knock the alarm bell to emit a warning sound. This design not only reminds the staff of the start and end of the test, facilitating their timely operation and data statistics, but also improves the safety and controllability of the test process. At the same time, the reminder of the alarm bell makes the entire test process more standardized and orderly. Description of the Drawings

[0017] Figure 1 Schematic three-dimensional structure diagram of a tire bead strength testing device proposed by the present invention; Figure 2 Schematic multi-angle three-dimensional structure diagram of a tire bead strength testing device proposed by the present invention; Figure 3 Schematic clamping plate structure diagram of a tire bead strength testing device proposed by the present invention; Figure 4 is Figure 3 enlarged structure diagram at A in Figure 5 Schematic fixed seat structure diagram of a tire bead strength testing device proposed by the present invention; Figure 6 is Figure 5 enlarged structure diagram at B in Figure 7 Schematic clamping seat and fixed frame structure diagram of a tire bead strength testing device proposed by the present invention; Figure 8 Schematic drive block structure diagram of a tire bead strength testing device proposed by the present invention; Figure 9 Schematic partial cross-sectional structure diagram of the catheter of a tire bead strength testing device proposed by the present invention.

[0018] In the figure: 11, base; 12, support frame; 21, test cylinder; 22, bracket; 23, fixed seat; 31, guide rod; 32, clamping plate; 33, guide ring; 34, first spring; 35, rotating plate; 36, connecting plate; 37, sliding groove; 38, top plate; 39, support rod; 310, first magnetic sheet; 311, clamping groove; 41, rotating shaft; 42, transmission gear; 43, fixed rack; 44, torsion spring; 45, connecting frame; 46, pressure roller; 51, fixed frame; 52, second magnetic sheet; 61, connecting rod; 62, clamping seat; 63, second spring; 64, fixed frame; 65, connecting plate; 66, transmission block; 71, sliding plate; 72, elastic airbag; 73, conduit; 74, mounting plate; 75, alarm bell; 76, piston plate; 77, push rod; 78, third spring; 79, linkage rack; 710, linkage gear; 711, shaft rod; 712, knocking rod; 81, scale line; 82, pointer. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Refer to Figures 1-9 , a tire bead strength testing device, including a base 11, a testing unit, two sets of clamping units, two sets of wire pressing units, and two sets of fixing units; Among them, the testing unit includes a support frame 12 fixedly installed on the top surface of the base 11. Two test cylinders 21 are symmetrically and fixedly installed on the support frame 12. A bracket 22 is fixedly installed at the telescopic end of the test cylinder 21. A fixed seat 23 is fixedly installed on the inner wall of the bracket 22. The cross-sectional shape of the fixed seat 23 is set to be semi-circular, and the corners of the fixed seat 23 are chamfered. The two sets of clamping units, wire pressing units, and fixing units respectively correspond to the two fixed seats 23. As Figure 2 shown, a scale line 81 is provided on the inner wall of the support frame 12, and a pointer 82 corresponding to the scale line 81 is fixedly installed at the telescopic end of the test cylinder 21; As Figures 2 to 3 shown, among them, the clamping unit includes a guide rod 31 fixedly installed on the inner wall of the support frame 12. A clamping plate 32 is fixedly installed at the end of the guide rod 31. A guide ring 33 is slidably sleeved on the guide rod 31. A first spring 34 is arranged between the guide ring 33 and the clamping plate 32. The two ends of the first spring 34 are respectively fixedly connected to the guide ring 33 and the clamping plate 32. A rotating plate 35 is rotatably installed on the side surface of the clamping plate 32. A connecting plate 36 is fixedly installed on the side surface of the rotating plate 35. A sliding groove 37 is formed on the side surface of the connecting plate 36. A top plate 38 is fixedly installed on the outer wall of the guide ring 33. The end of the top plate 38 is slidably connected to the sliding groove 37. A plurality of clamping grooves 311 are formed on the side surface of the clamping plate 32; During use, first, the staff needs to cut the bead wire of the tire to be tested into sections for testing. After the cutting is completed, the wire can be placed in the card slots 311 on the sides of the two clamping plates 32. The inner diameters of several card slots 311 are different, and the staff needs to place wires of different diameters in the card slots 311 of corresponding sizes. After the wires are placed, the staff can start the test cylinders 21. After the two test cylinders 21 start, they can shorten. As the test cylinders 21 shorten, the brackets 22 and the fixed seats 23 can move, and after moving, under the action of magnetism, the guide ring 33 can be driven by the support rod 39 to slide along the guide rod 31 to compress the first spring 34. When the guide ring 33 moves, it can push the rotating plate 35 through the top plate 38, causing the rotating plate 35 to rotate and approach the clamping plate 32 to clamp and fix the wire in the card slot 311. Then the staff can release the wire to complete the feeding. During the whole test process, the movement of the test cylinders 21 can be shown through the pointer 82 and the scale line 81 for the staff to observe.

[0021] As Figure 5 shown, the wire pressing unit includes a rotating shaft 41 rotatably installed on the side of the fixed seat 23. A transmission gear 42 is fixedly sleeved on the outer wall of the rotating shaft 41. A fixed rack 43 meshing with the transmission gear 42 is fixedly installed on the inner wall of the support frame 12. A torsion spring 44 is sleeved on the end of the rotating shaft 41, and both ends of the torsion spring 44 are fixedly connected to the rotating shaft 41 and the fixed seat 23 respectively. A connecting frame 45 is fixedly installed on the outer wall of the rotating shaft 41. A pressing roller 46 is rotatably sleeved on the end of the connecting frame 45. The outer wall of the pressing roller 46 is in contact with the outer wall of the fixed seat 23. After the wire is clamped and fixed by the clamping plate 32 and the rotating plate 35, both ends of it can be located on the sides of the two fixed seats 23. As the test cylinders 21 shorten and the fixed seats 23 continue to move, the transmission gear 42 on the side of the fixed seats 23 can mesh with the fixed rack 43, and then the transmission gear 42 and the rotating shaft 41 can be driven to rotate. When the rotating shaft 41 rotates, the pressing roller 46 can be driven to rotate through the connecting frame 45. During the rotation of the connecting frame 45, the end of the wire can be pressed by the pressing roller 46, causing the end of the wire to bend and fit with the outer wall of the fixed seat 23. The corners of the fixed seat 23 are chamfered to prevent the wire from being damaged when bent. After the test is completed, the wire is in a broken state. The staff can extend the two test cylinders 21. During the extension of the test cylinders 21, first, the transmission gear 42 can mesh with the fixed rack 43. At this time, the rotating shaft 41, the connecting frame 45, and the pressing roller 46 can rotate in the other direction. When the pressing roller 46 rotates to the outer wall of the fixed seat 23, the broken end of the wire after the test can be pressed against the outer wall of the fixed seat 23 to fix the wire.

[0022] A support rod 39 is fixedly installed on the outer wall of the guide ring 33. A first magnetic sheet 310 is fixedly installed at the top of the support rod 39. A fixing frame 51 is fixedly installed on the side of the fixed seat 23. A second magnetic sheet 52 is fixedly installed at the bottom end of the fixing frame 51. The magnetic poles of the first magnetic sheet 310 and the second magnetic sheet 52 facing each other are opposite. In the initial state, the first magnetic sheet 310 on the guide ring 33 and the second magnetic sheet 52 on the fixed seat 23 are in a staggered state. Therefore, under the action of the first spring 34, the guide ring 33 moves away from the clamping plate 32. As the testing cylinder 21 shortens, the support 22, the fixed seat 23, and the second magnetic sheet 52 can move. After moving, the second magnetic sheet 52 can face the first magnetic sheet 310, and the magnetic poles of the two facing each other are opposite. Therefore, under the action of the attracting magnetic force, the guide ring 33 can be driven to slide along the guide rod 31 through the support rod 39. When the fixed seat 23 continues to move upward, at this time, the first magnetic sheet 310 and the second magnetic sheet 52 can be in a staggered state, releasing the clamping of the steel wire. As the testing cylinder 21 continues to shorten, the transmission gear 42 can be separated from the fixed rack 43. Under the action of the torsion spring 44, the rotating shaft 41, the connecting frame 45, and the pressure roller 46 can be reversely rotated, so that the pressure roller 46 is reset and separated from the fixed seat 23, avoiding affecting the strength test of the steel wire.

[0023] The fixing unit includes two connecting rods 61 symmetrically and fixedly installed on the outer wall of the fixed seat 23. A clamping seat 62 is slidably installed on the connecting rod 61. A second spring 63 with two ends fixedly connected to the connecting rod 61 and the clamping seat 62 respectively is sleeved on the connecting rod 61. A fixed frame 64 is fixedly installed on the inner wall of the support frame 12. A connecting plate 65 is fixedly installed on the side of the clamping seat 62. One end of the clamping seat 62 away from the connecting plate 65 is set to be an arc shape adapted to the outer wall of the fixed seat 23. A transmission block 66 is fixedly installed on the bottom surface of the end of the connecting plate 65. The cross-sectional shape of the transmission block 66 is an isosceles trapezoid. After the steel wire is bent, its end can be located between the clamping seat 62 and the fixed seat 23. And as the fixed seat 23 continues to move, at this time, the transmission block 66 can move out of the fixed frame 64. Under the action of the second spring 63, the clamping seat 62 can slide along the connecting rod 61 towards the direction close to the fixed seat 23, so as to fix the end of the steel wire between the clamping seat 62 and the fixed seat 23, realizing the firm fixation of the steel wire. After the strength test is completed and the steel wire is fixed, when the fixed seat 23 continues to move downward, the transmission block 66 can be inserted into the fixed frame 64. With the cross-sectional shape of the transmission block 66 being an isosceles trapezoid, when the transmission block 66 is inserted into the fixed frame 64, it can drive the clamping seat 62 to slide and separate from the fixed seat 23 through the connecting plate 65. At this time, the staff can hold the steel wire. And as the fixed seat 23 continues to move, when the transmission gear 42 is separated from the fixed rack 43, the pressure roller 46 can be reversely rotated and reset under the action of the torsion spring 44, and the staff can directly remove the two sections of the tested steel wire. After removing the steel wire, continue to start the testing cylinder 21 to make it reset.

[0024] The inner wall of the support frame 12 is provided with a reminder unit adapted to the transmission block 66. The reminder unit includes a slide plate 71 slidably mounted on the inner wall of the fixed frame 64. An elastic airbag 72 is arranged between the slide plate 71 and the inner wall of the support frame 12. A conduit 73 is fixedly mounted on the side of the support frame 12, and the end of the conduit 73 communicates with the elastic airbag 72. An installation plate 74 corresponding to the conduit 73 is fixedly mounted on the side of the support frame 12. A plurality of alarm bells 75 distributed in a circular array are arranged on the bottom surface of the installation plate 74. A shaft rod 711 is rotatably mounted on the bottom surface of the installation plate 74. A knocking rod 712 adapted to the alarm bell 75 is fixedly mounted on the outer wall of the shaft rod 711. A transmission structure is arranged between the conduit 73 and the shaft rod 711; The transmission structure includes a piston plate 76 slidably mounted on the inner wall of the conduit 73. A push rod 77 is fixedly mounted on the side of the piston plate 76. A third spring 78 with two ends fixedly connected to the side of the piston plate 76 and the inner wall of the conduit 73 respectively is sleeved on the push rod 77. A linkage rack 79 is fixedly mounted on the end of the push rod 77 located outside the conduit 73. A linkage gear 710 meshing with the linkage rack 79 is fixedly mounted on the bottom end of the shaft rod 711; During the entire strength test process, before the test starts, when the transmission block 66 is separated from the fixed frame 64, at this time, under the action of the elastic airbag 72, the slide plate 71 can slide, and the elastic airbag 72 can stretch. During the stretching process of the elastic airbag 72, under the action of air pressure, the piston plate 76 can be driven to slide along the conduit 73, driving the push rod 77 and the linkage rack 79. When the linkage rack 79 slides, it can drive the linkage gear 710 to rotate, and synchronously drive the shaft rod 711 and the knocking rod 712 to rotate, thereby knocking the alarm bell 75 to emit a warning sound to remind the start of the test. After the test is completed, during the reset process of the fixed seat 23, when the transmission block 66 is inserted into the fixed frame 64, the slide plate 71 can be pushed to compress the elastic airbag 72. When the elastic airbag 72 is compressed, it can push the piston plate 76 in the reverse direction, and thus can also knock the alarm bell 75, thereby emitting a warning sound to remind the end of the test, so that the staff can remove the steel wire after the test and conduct the statistics of the test data, which is more convenient to use.

[0025] The specific working principle of the present invention is as follows: During use, first, the staff needs to cut the bead wire of the tire to be tested into segments for testing. After cutting, the wire can be placed in the card slots 311 on the sides of the two clamping plates 32. The inner diameters of several card slots 311 are different. The staff needs to place wires of different diameters in the card slots 311 of corresponding sizes. After placing the wire, the staff can start the test cylinder 21. After the two test cylinders 21 start, they can shorten. In the initial state, the magnetic sheet one 310 on the guide ring 33 and the magnetic sheet two 52 on the fixed seat 23 are in a staggered state. Therefore, under the action of the first spring 34, the guide ring 33 moves away from the clamping plate 32. As the test cylinder 21 shortens, the bracket 22, the fixed seat 23, and the magnetic sheet two 52 can move. After moving, the magnetic sheet two 52 can face the magnetic sheet one 310, and the opposite magnetic poles of the two are opposite. Therefore, under the action of the attracting magnetic force, the guide ring 33 can be driven by the support rod 39 to slide along the guide rod 31 to compress the first spring 34. When the guide ring 33 moves, it can push the rotating plate 35 through the top plate 38, causing the rotating plate 35 to rotate and approach the clamping plate 32 to clamp and fix the wire in the card slot 311. The staff can then release the wire to complete the feeding; After the wire is clamped and fixed by the clamping plate 32 and the rotating plate 35, its two ends can be located on the sides of the two fixed seats 23. As the test cylinder 21 shortens, when the fixed seat 23 continues to move, the transmission gear 42 on its side can engage with the fixed rack 43, and then the transmission gear 42 and the rotating shaft 41 can be driven to rotate. When the rotating shaft 41 rotates, the pressing roller 46 can be driven to rotate by the connecting frame 45. During the rotation of the connecting frame 45, the end of the wire can be pressed by the pressing roller 46, causing the end of the wire to bend and fit against the outer wall of the fixed seat 23. The corners of the fixed seat 23 are chamfered to prevent the wire from being damaged when bent; after the wire is bent, its end can be located between the clamping seat 62 and the fixed seat 23. And as the fixed seat 23 continues to move, at this time, the transmission block 66 can move out of the fixed frame 64. Under the action of the second spring 63, the clamping seat 62 can slide along the connecting rod 61 towards the direction close to the fixed seat 23, so as to fix the end of the wire between the clamping seat 62 and the fixed seat 23, realizing the firm fixation of the wire. When the fixed seat 23 continues to move upward, at this time, the magnetic sheet one 310 and the magnetic sheet two 52 are in a staggered state, releasing the clamping of the wire. At the same time, the transmission gear 42 can be separated from the fixed rack 43. Under the action of the torsion spring 44, the rotating shaft 41, the connecting frame 45, and the pressing roller 46 can be reversed, causing the pressing roller 46 to return to its position and separate from the fixed seat 23 to avoid affecting the strength test of the wire. Then, continue to shorten the test cylinder 21 to start the strength test of the wire; After the test is completed and the steel wire is in a broken state, the staff can extend the two test cylinders 21. During the extension of the test cylinders 21, first, the transmission gear 42 can mesh with the fixed rack 43. At this time, the rotating shaft 41, the connecting frame 45, and the pressure roller 46 can rotate in the other direction. When the pressure roller 46 rotates to the outer wall of the fixed seat 23, the broken end of the steel wire after the test can be pressed against the outer wall of the fixed seat 23 to fix the steel wire. After the steel wire is fixed and the fixed seat 23 continues to move downward, the transmission block 66 can be inserted into the fixed frame 64. With the cross-sectional shape of the transmission block 66 being an isosceles trapezoid, when the transmission block 66 is inserted into the fixed frame 64, it can drive the clamping seat 62 to slide and separate from the fixed seat 23 through the connecting plate 65. At this time, the staff can hold the steel wire. And as the fixed seat 23 continues to move, when the transmission gear 42 separates from the fixed rack 43, under the action of the torsion spring 44, the pressure roller 46 can reverse and reset. Then the staff can directly remove the two sections of the steel wire after the test. After removing the steel wire, continue to start the test cylinder 21 to make it reset; During the entire strength test process, before the test starts, when the transmission block 66 separates from the fixed frame 64, at this time, under the action of the elastic airbag 72, the sliding plate 71 can slide, and the elastic airbag 72 can expand. During the expansion of the elastic airbag 72, under the action of air pressure, it can drive the piston plate 76 to slide along the conduit 73 to drive the push rod 77 and the linkage rack 79. When the linkage rack 79 slides, it can drive the linkage gear 710 to rotate, and synchronously drive the shaft rod 711 and the knocking rod 712 to rotate, thereby knocking on the alarm bell 75 to emit a warning sound to remind that the test is started. After the test is completed and during the reset process of the fixed seat 23, when the transmission block 66 is inserted into the fixed frame 64, it can push the sliding plate 71 to compress the elastic airbag 72. When the elastic airbag 72 is compressed, it can push the piston plate 76 in the reverse direction, and thus can also knock on the alarm bell 75 to emit a warning sound to remind that the test is over, so that the staff can remove the steel wire after the test and conduct the statistics of the test data, making it more convenient to use.

[0026] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A tire bead strength testing device, characterized in that: It comprises a base (11), a testing unit, two sets of clamping units, two sets of wire pressing units and two sets of fixing units; The test unit comprises a support frame (12) fixedly mounted on the top surface of the base (11), two test cylinders (21) are symmetrically fixedly mounted on the support frame (12), a bracket (22) is fixedly mounted on the telescopic end of the test cylinder (21), a fixing seat (23) is fixedly mounted on the inner wall of the bracket (22), and the two groups of the clamping unit, the thread pressing unit and the fixing unit correspond to the two fixing seats (23) respectively; The clamping unit comprises a guide rod (31) fixedly mounted on the inner wall of the support frame (12), a clamping plate (32) fixedly mounted on the end of the guide rod (31), a guide ring (33) slidably mounted on the guide rod (31), a spring (34) being arranged between the guide ring (33) and the clamping plate (32), a rotating plate (35) rotatably mounted on the side of the clamping plate (32), a connecting plate (36) fixedly mounted on the side of the rotating plate (35), a sliding groove (37) being provided on the side of the connecting plate (36), a top plate (38) fixedly mounted on the outer wall of the guide ring (33), and an end of the top plate (38) being slidably connected to the sliding groove (37).

2. A tire bead ring strength testing device according to claim 1, characterized in that: The two ends of the spring 1 (34) are respectively fixedly connected to the guide ring (33) and the clamping plate (32), and a plurality of clamping grooves (311) are provided on the side surface of the clamping plate (32).

3. A tire bead ring strength testing device according to claim 1, characterized in that: The wire pressing unit comprises a rotating shaft (41) rotatably mounted on the side of a fixed seat (23); a transmission gear (42) is fixedly sleeved on the outer wall of the rotating shaft (41); a fixed rack (43) meshing with the transmission gear (42) is fixedly mounted on the inner wall of the support frame (12); a torsion spring (44) is sleeved on the end of the rotating shaft (41), and the two ends of the torsion spring (44) are respectively fixedly connected to the rotating shaft (41) and the fixed seat (23); a connecting frame (45) is fixedly mounted on the outer wall of the rotating shaft (41); and a pressing roller (46) is rotatably sleeved on the end of the connecting frame (45).

4. A tire bead ring strength testing device according to claim 3, characterized in that: The cross-sectional shape of the fixing seat (23) is set to be semicircular, and the corners of the fixing seat (23) are chamfered, and the outer wall of the pressure roller (46) fits the outer wall of the fixing seat (23).

5. A tire bead ring strength testing device according to claim 3, characterized in that: A support rod (39) is fixedly mounted on the outer wall of the guide ring (33), a magnetic sheet one (310) is fixedly mounted on the top of the support rod (39), a fixing frame (51) is fixedly mounted on the side of the fixing seat (23), a magnetic sheet two (52) is fixedly mounted on the bottom of the fixing frame (51), and the magnetic poles of the magnetic sheet one (310) and the magnetic sheet two (52) are opposite.

6. A tire bead ring strength testing device according to claim 1, characterized in that: The fixing unit comprises two connecting rods (61) symmetrically fixedly mounted on the outer wall of the fixing seat (23); a clamping seat (62) is slidably mounted on the connecting rod (61); a second spring (63) is sleeved on the connecting rod (61) and has two ends fixedly connected to the connecting rod (61) and the clamping seat (62), respectively; a fixing frame (64) is fixedly mounted on the inner wall of the support frame (12); a connecting plate (65) is fixedly mounted on the side of the clamping seat (62); and a transmission block (66) is fixedly mounted on the bottom surface of the end of the connecting plate (65).

7. A tire bead ring strength testing device according to claim 6, characterized in that: One end of the clamping seat (62) away from the connecting plate (65) is arranged in an arc shape adapted to the outer wall of the fixing seat (23), and the cross-sectional shape of the transmission block (66) is an isosceles trapezoid.

8. A tire bead ring strength testing device according to claim 7, characterized in that: The inner wall of the support frame (12) is provided with a reminder unit adapted to the transmission block (66).

9. A tire bead ring strength testing device according to claim 8, characterized in that: The reminder unit comprises a slide plate (71) slidably mounted on the inner wall of a fixed frame (64); an elastic air bag (72) is arranged between the slide plate (71) and the inner wall of a support frame (12); a conduit (73) is fixedly mounted on the side of the support frame (12); and the end of the conduit (73) is communicated with the elastic air bag (72); a mounting plate (74) corresponding to the conduit (73) is fixedly mounted on the side of the support frame (12); a plurality of alarm bells (75) distributed in a ring array are arranged on the bottom surface of the mounting plate (74); a shaft (711) is rotatably mounted on the bottom surface of the mounting plate (74); a knocking rod (712) adapted to the alarm bell (75) is fixedly mounted on the outer wall of the shaft (711); and a transmission structure is arranged between the conduit (73) and the shaft (711).

10. A tire bead ring strength testing device according to claim 9, characterized in that: The transmission structure comprises a piston plate (76) slidably mounted on the inner wall of the conduit (73); a push rod (77) is fixedly mounted on the side of the piston plate (76); a spring (78) is sleeved on the push rod (77) and has two ends fixedly connected to the side of the piston plate (76) and the inner wall of the conduit (73), respectively; a linkage rack (79) is fixedly mounted on one end of the push rod (77) located outside the conduit (73); and a linkage gear (710) meshing with the linkage rack (79) is fixedly mounted on the bottom end of the shaft rod (711).

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