Automatic positioning device for tire bead

Abstract

The application discloses a kind of automatic positioning device of tire steel ring, it is related to tire processing equipment technical field, including mounting bracket, jacking cylinder is installed on mounting bracket, mounting seat is installed on crescent plate, the position of crescent plate corresponds with the position of steel wire groove on forming drum, crescent plate includes fixedly connected on mounting seat crescent plate fixed plate, and movablely connected in crescent plate fixed plate crescent plate movable plate, crescent plate movable plate connects connecting rod, connecting rod connects power device, power device drives crescent plate movable plate to move up and down in crescent plate fixed plate, realize the size adjustment of crescent plate;The present application is provided with telescopic crescent plate, so that the contact area of crescent plate and steel ring is larger, more easily fixed steel ring, so that it is not easy to deviate;Meanwhile, still being provided with the steel ring righting mechanism that is linked with device, can deviated steel ring, right to steel wire groove, improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of tire processing equipment technology, and specifically to an automatic tire wire bead positioning device. Background Technology

[0002] Currently, the forming process is a crucial step in tire production. It involves layering semi-finished products, positioning the wire rings, then wrapping the semi-finished products backwards, and finally rolling the tread adhesive. The current wire ring positioning device uses a cylinder to push out a crescent-shaped plate with permanent magnets after the semi-finished products are bonded but before wrapping. This plate rests against the left and right sides of the forming drum, and the wire ring is then manually placed on the outer surface of the wire groove and secured by the magnets. As the forming drum inflates, the wire ring is inserted into the wire groove. However, the current crescent-shaped plate has a relatively short arc length; the cantilever arc length of one side of the forming drum is approximately 1 / 5 of the drum's circumference. During wire ring positioning, more than half of the wire ring is suspended, making it impossible to guarantee its perpendicularity. This can easily cause the wire ring to shift forward or backward when being inserted into the groove, resulting in a misalignment of the tire blank and preventing it from being concentric with the center of the forming drum. This can lead to poor vulcanization, affecting product quality and reducing production efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic tire wire bead positioning device, which is equipped with a retractable crescent plate, so that the contact area between the crescent plate and the wire bead is larger, making it easier to fix the wire bead and prevent it from shifting; at the same time, a wire bead straightening mechanism linked to the device is also provided, which can straighten the shifted wire bead into the wire groove, thereby improving work efficiency.

[0004] This invention includes a mounting frame, on which a lifting cylinder is mounted. A mounting plate is connected to the front of the lifting cylinder. An adjusting rod is fixedly connected inside the mounting plate. Mounting seats are fixedly connected to the front and rear ends of the adjusting rod. A crescent plate is mounted on the mounting seat. The position of the crescent plate corresponds to the position of the wire groove on the forming drum. The crescent plate includes a crescent plate fixing plate fixed to the mounting seat and a crescent plate movable plate movably connected inside the crescent plate fixing plate. The crescent plate movable plate is connected to a power device. The power device drives the crescent plate movable plate to move up and down inside the crescent plate fixing plate to adjust the size of the crescent plate.

[0005] Preferably, the crescent-shaped movable plate has two pieces, which are symmetrically arranged at the upper and lower ends of the crescent-shaped fixed plate.

[0006] Preferably, the crescent plate fixing plate is an arc shape adapted to the outer diameter of the wire groove on the forming drum, and the crescent plate movable plate is an arc shape with the same center and outer diameter as the crescent plate fixing plate. The crescent plate movable plate and the crescent plate fixing plate together form a crescent-shaped semi-encircle on the outside of the forming drum.

[0007] Preferably, on the front arc-shaped surface of the movable crescent plate and the fixed crescent plate, a number of permanent magnets are fixed at intervals on the inner side of the arc-shaped plate.

[0008] Preferably, both the fixed crescent plate and the movable crescent plate are provided with shock-absorbing rubber pads on their front sides.

[0009] Preferably, the adjusting rod is also equipped with a wire ring straightening mechanism, which includes straightening rods. There are two straightening rods, and a return spring is connected between the two straightening rods. Each straightening rod has a rocker arm movably connected to its end. The end of the rocker arm is fixed to the arc plate, and the arc plate is attached to the outer surface of the forming drum.

[0010] Preferably, there are two arc-shaped plates, distributed at the front and rear ends of the forming drum surface.

[0011] Preferably, the arc-shaped plate and the forming drum are arranged at the same center, and the inner diameter of the arc-shaped plate is the same as the outer diameter of the forming drum.

[0012] Preferably, the cross-section of the arc-shaped plate is a right trapezoid, with the hypotenuse of the right trapezoid located on the outside of the arc-shaped plate.

[0013] Preferably, a guide sleeve is provided on the outer side of the rocker arm, and the guide sleeve is parallel to the central axis of the forming drum.

[0014] In summary, the present invention has the following beneficial effects:

[0015] 1. The crescent plate includes a fixed crescent plate and a movable crescent plate. Under the action of the push-pull cylinder, the movable crescent plate can extend beyond the fixed crescent plate. Without affecting the operator's operation, the crescent plates on the front and rear sides of the forming drum can extend, so that the circumference of the crescent plate can reach up to 2 / 3 of the circumference of the forming drum. This reduces the suspended length of the wire ring, ensures the perpendicularity of the wire ring to the forming drum, improves the positioning accuracy of the wire ring, avoids tire blank deviation, ensures tire blank quality, reduces waste due to poor vulcanization, and improves tire quality.

[0016] 2. A wire ring straightening mechanism is also provided. During the movement of the device towards the forming drum, the arc-shaped plate on the wire ring straightening mechanism moves against the surface of the forming drum to the front and rear sides of the drum, pushing the wire rings that have not entered the wire groove towards the wire groove. Finally, the wire rings are attracted by the permanent magnets on the crescent plate, facilitating the fixing of the wire rings and improving work efficiency. Simultaneously, during the pushing of the wire rings, because the arc-shaped plate is in close contact with the surface of the forming drum and its inner diameter is the same as the outer diameter of the forming drum, the arc-shaped plate also corrects the position of tilted wire rings, gradually aligning them with the direction of the wire groove as they are pushed. The wire ring straightening mechanism is linked when the lifting cylinder pushes the device forward, requiring no additional power unit, resulting in a simple structure and convenient operation.

[0017] 3. Both the front side of the crescent plate fixing plate and the crescent plate movable plate are equipped with shock-absorbing rubber pads. The shock-absorbing rubber pads are used to prevent the crescent plate from vibrating and making noise when it comes into contact with the steel wire ring, and to prevent hard contact from damaging the crescent plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an automatic tire wire bead positioning device and a forming drum according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of an automatic tire wire bead positioning device according to the present invention;

[0020] Figure 3 This is a schematic diagram of the installation of the wire ring straightening mechanism;

[0021] Figure 4 This is a schematic diagram of the wire coil straightening mechanism.

[0022] Figure 5 This is a schematic diagram of the arc-shaped plate.

[0023] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0024] In the diagram: 1. Mounting bracket; 2. Lifting cylinder; 3. Mounting plate; 4. Adjusting rod; 5. Mounting seat; 6. Forming drum; 7. Wire groove; 8. Crescent plate fixing plate; 9. Crescent plate movable plate; 10. Connecting rod; 11. Permanent magnet; 12. Rubber pad; 13. Wire ring straightening mechanism; 14. Straightening rod; 15. Return spring; 16. Rocker arm; 17. Arc plate; 18. Guide sleeve; 19. Push-pull cylinder; 20. Guide shaft. Detailed Implementation

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] The orientations mentioned in this specification are based on the orientation of the automatic tire wire bead positioning device of the present invention during normal operation, and do not limit its orientation during storage and transportation. They only represent relative positional relationships and do not represent absolute positional relationships.

[0027] like Figures 1 to 2As shown, an automatic tire wire bead positioning device includes a mounting frame 1, on which a lifting cylinder 2 is mounted. In this embodiment, the lifting cylinder 2 is used as the power unit; in other embodiments, other devices can be used instead. A mounting plate 3 is connected to the front side of the lifting cylinder 2, and an adjusting rod 4 is fixedly connected inside the mounting plate 3. Mounting seats 5 are fixedly connected to the front and rear ends of the adjusting rod 4. A crescent plate is mounted on the mounting seat 5, and the position of the crescent plate corresponds to the position of the wire groove 7 on the forming drum 6. The lifting cylinder 2 pushes the mounting plate 3 and the adjusting rod 4, causing the crescent plate to move back and forth. When the crescent plate abuts against the position of the wire groove 7, the wire bead is fixed inside the wire groove 7. Preferably, in order to increase the contact area between the crescent plate and the wire bead, making the wire bead more stable during the fixing process and less prone to displacement, two positioning devices are provided, which are arranged opposite each other on the left and right sides of the forming drum 6.

[0028] The crescent-shaped plate includes a crescent-shaped plate fixing plate 8 fixed to the mounting base 5, and a crescent-shaped plate movable plate 9 movably connected within the crescent-shaped plate fixing plate 8. Two crescent-shaped plate movable plates 9 are provided, symmetrically arranged at the upper and lower ends of the crescent-shaped plate fixing plate 8. The crescent-shaped plate movable plates 9 are connected by connecting rods 10, and the connecting rods 10 of the two crescent-shaped plate movable plates 9 are connected together by a guide shaft 20. The guide shaft 20 is connected to a power device. Preferably, in this solution, the power device is a push-pull cylinder 19; in other solutions, other power devices can also be used. The push-pull cylinder 19 drives the crescent-shaped plate movable plate 9 to move up and down within the crescent-shaped plate fixing plate 8, thereby adjusting the size of the crescent-shaped plate. The movable crescent-shaped plate 9 is movably installed within the crescent-shaped plate fixing plate 8, so that when the movable crescent-shaped plate 9 is unfolded, the entire area of ​​the crescent-shaped plate is larger.

[0029] The crescent plate fixing plate 8 is an arc shape adapted to the outer diameter of the wire groove 7 on the forming drum 6, and its position corresponds to the wire groove 7. The crescent plate movable plate 9 is an arc shape with the same center and outer diameter as the crescent plate fixing plate 8. The crescent plate movable plate 9 and the crescent plate fixing plate 8 together form a crescent-shaped semi-encircle on the outside of the forming drum 6. After the crescent plates on the left and right sides of the forming drum 6 are fully unfolded, their circumference can reach up to 2 / 3 of the circumference of the forming drum 6, which can reduce the suspended length of the wire ring.

[0030] Furthermore, on the front arc-shaped surface of the crescent plate movable plate 9 and the crescent plate fixed plate 8, a number of permanent magnets 11 are fixed at intervals on the inner side of the arc plate 17. When the crescent plate approaches the wire ring, the permanent magnets 11 attract the wire ring and fix the wire ring in place.

[0031] Furthermore, both the front sides of the crescent plate fixing plate 8 and the crescent plate movable plate 9 are provided with shock-absorbing rubber pads 12. The shock-absorbing rubber pads 12 are used to prevent the crescent plate from vibrating and making noise when it comes into contact with the steel wire ring, and to prevent hard contact from damaging the crescent plate.

[0032] like Figures 3 to 6 As shown, a wire ring straightening mechanism 13 is also installed on the adjusting rod 4. The wire ring straightening mechanism 13 includes a straightening rod 14, which is connected to the adjusting rod 4 by a pin. The wire ring straightening mechanism 13 follows the adjusting rod 4 and moves back and forth under the push of the lifting cylinder 2. A rocker arm 16 is movably connected to the end of the straightening rod 14. The end of the rocker arm 16 is fixed to the arc plate 17, which is against the outer surface of the forming drum 6. A guide sleeve 18 is provided on the outer side of the rocker arm 16. The guide sleeve 18 is parallel to the central axis of the forming drum 6 and is fixed to the outer part by an external component. In the device, the guide sleeve 18 is used to ensure that the rocker arm 16 drives the arc plate 17 to move along the central axis of the forming drum 6; there are two arc plates 17, distributed at the front and rear ends of the surface of the forming drum 6. The arc plates 17 and the forming drum 6 are set at the same center. The inner diameter of the arc plate 17 is the same as the outer diameter of the forming drum 6. The arc length of the arc plate 17 is not greater than 1 / 2 of the arc length of the forming drum 6, and they are symmetrically distributed on the upper and lower sides of the device; the cross section of the arc plate 17 is a right trapezoid. The hypotenuse of the right trapezoid is located on the outside of the arc plate 17. The hypotenuse plays a guiding role, which facilitates the arc plate 17 to push the wire ring.

[0033] When the adjusting rod 4 moves back and forth under the push of the lifting cylinder 2, the wire ring straightening mechanism 13 moves back and forth with the adjusting rod 4. The arm length of the straightening rod 14 is longer than that of the connecting rod 10. The arc plate 17 will contact the forming drum 6 before the crescent plate. After the arc plate 17 touches the forming drum 6, it can no longer move forward. Under the push of the adjusting rod 4, the straightening rod 14 gradually unfolds, pushing the rocker arm 16. The rocker arm 16 drives the arc plate 17 to move to the front and rear sides of the forming drum 6, pushing the wire ring that has not entered the wire groove 7 to move towards the wire groove 7, and finally being attracted by the permanent magnet 11 on the crescent plate. The crescent plate facilitates the fixing of the wire ring; when the wire ring straightening mechanism 13 moves backward and the arc plate 17 leaves the surface of the forming drum 6, the straightening rod 14 retracts to the initial position under the action of the return spring 15, driving the arc plate 17 to return to the initial position, completing one round of action; at the same time, during the process of pushing the wire ring, because the arc plate 17 is in close contact with the surface of the forming drum 6 and the inner diameter of the arc plate 17 is the same as the outer diameter of the forming drum 6, the arc plate 17 also has the function of correcting the position of the tilted wire ring, so that it gradually aligns with the direction of the wire groove 7 during the process of being pushed.

[0034] During the positioning of the wire ring, the lifting cylinder 2 pushes the device forward, and the arc plate 17 of the wire ring straightening mechanism 13 first contacts the forming drum 6. Under the push of the straightening rod 14 and the rocker arm 16, the arc plate 17 moves along the central axis of the forming drum 6 to both sides, pushing the offset wire ring to the vicinity of the wire groove 7. At the same time, the crescent plate fixing plate 8 contacts the forming drum 6, and the crescent plate movable plate 9 extends under the action of the push-pull cylinder 19. The entire crescent plate unfolds around the wire ring, forming a ring around the outside of the forming drum 6 with an arc length of about 2 / 3. The permanent magnet 11 attracts the wire ring. The forming drum 6 expands, pushing the device backward, and the wire ring is inserted into the wire groove 7. At the same time, the push-pull cylinder 19 drives the crescent plate movable plate 9 to retract and return to its original position. By setting the wire ring straightening mechanism 13, the misaligned wire ring can be pushed to the vicinity of the wire groove 7 for easy positioning. The extension and retraction of the crescent plate movable plate 9 can increase the contact length between the crescent plate and the wire ring, enhance the stability of the wire ring, ensure verticality, and achieve accurate circumferential positioning of the wire ring. This ensures the concentricity of the wire ring and the center of the forming drum 6, avoids deviation of the wire ring in the tire blank, ensures the quality of tire blank forming, reduces poor vulcanization, and improves tire quality.

[0035] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An automatic tire wire bead positioning device, comprising a mounting frame (1), a lifting cylinder (2) mounted on the mounting frame (1), a mounting plate (3) connected to the front side of the lifting cylinder (2), an adjusting rod (4) fixedly connected inside the mounting plate (3), mounting seats (5) fixedly connected to the front and rear ends of the adjusting rod (4), a crescent plate mounted on the mounting seat (5), the position of the crescent plate corresponding to the position of the wire groove (7) on the forming drum (6), characterized in that: The crescent plate includes a crescent plate fixing plate (8) fixed to the mounting base (5) and a crescent plate movable plate (9) movably connected inside the crescent plate fixing plate (8). The crescent plate movable plate (9) is connected to a power device, which drives the crescent plate movable plate (9) to move up and down inside the crescent plate fixing plate (8) to adjust the size of the crescent plate. There are two crescent plate movable plates (9), which are symmetrically arranged at the upper and lower ends of the crescent plate fixing plate (8). The crescent plate fixing plate (8) is an arc shape that adapts to the outer diameter of the wire groove (7) on the forming drum (6). The crescent plate movable plate (9) is an arc shape with the same center and outer diameter as the crescent plate fixing plate (8). The crescent plate movable plate (9) and the crescent plate fixing plate (8) together form a crescent-shaped semi-encircle on the outside of the forming drum (6).

2. The automatic tire wire bead positioning device as described in claim 1, characterized in that: Several permanent magnets (11) are fixed at intervals on the inner side of the front arc-shaped surface of the movable crescent plate (9) and the fixed crescent plate (8).

3. The automatic tire wire bead positioning device as described in claim 1, characterized in that: Both the front side of the crescent plate fixing plate (8) and the crescent plate movable plate (9) are provided with shock-absorbing rubber pads (12).

4. The automatic tire bead positioning device as described in claim 1, characterized in that: The adjusting rod (4) is also equipped with a wire ring straightening mechanism (13). The wire ring straightening mechanism (13) includes a straightening rod (14). There are two straightening rods (14). A return spring (15) is connected between the two straightening rods (14). A rocker arm (16) is movably connected to the end of each straightening rod (14). The end of the rocker arm (16) is fixed to the arc plate (17). The arc plate (17) is attached to the outer surface of the forming drum (6).

5. The automatic tire wire bead positioning device as described in claim 4, characterized in that: Two arc-shaped plates (17) are provided, distributed at the front and rear ends of the surface of the forming drum (6).

6. The automatic tire bead positioning device as described in claim 4, characterized in that: The arc-shaped plate (17) is set at the same center as the forming drum (6), and the inner diameter of the arc-shaped plate (17) is the same as the outer diameter of the forming drum (6).

7. The automatic tire wire bead positioning device as described in claim 4, characterized in that: The cross-section of the arc plate (17) is a right trapezoid, and the hypotenuse of the right trapezoid is located on the outside of the arc plate (17).

8. The automatic tire wire bead positioning device as described in claim 4, characterized in that: The rocker arm (16) is provided with a guide sleeve (18) on its outer side, and the guide sleeve (18) is parallel to the central axis of the forming drum (6).

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