Roller turn-up mechanism and mechanical drum

Abstract

This application provides a roller turning-up mechanism and a mechanical drum. The roller turning-up mechanism is provided on a main shaft assembly (10) and includes a plurality of first turning-up structures (20) provided in the circumferential direction of the main shaft assembly (10). The first turning-up structure (20) includes a roller assembly (201) for rolling the sidewall (50) of a tire, a first drive rod (21) drivingly connected to the roller assembly (201), a first drive assembly (211) connected to the first drive rod (21) for driving the roller assembly (201) by the first drive rod (21) to move in the radial direction of the tire, a support assembly (25) connected to the first drive rod (21) for supporting the sidewall (50) outside the roller turning-up mechanism, and a second drive assembly (221) connected to the support assembly (25) for driving the roller assembly (201) by the support assembly (25) to press the tire. The roller assembly (201) is provided on the support assembly (25) and is rotatably connected not only to the second drive assembly (221) but also to the first drive rod (21). The roller assembly (201) further includes a second drive rod (22) and a third drive rod (23). One end of the second drive rod (22) is rotatably connected to an end of the support assembly (25) away from the roller assembly (201), and the other end is rotatably connected to the second drive rod (22). The second drive assembly (221) drives the second drive rod (22) to move, thereby moving and rotating the first drive rod (21) and the third drive rod (23) respectively. This roller turning-up mechanism solves the problem of the prior art that wrinkles are likely to occur when the mechanical drum rolls the sidewall.

Description

Technical Field

[0001] This application relates to the technical field of rubber tires, and specifically, to a roller turn-up mechanism and a mechanical drum.

Background Art

[0002] When turning up and molding an existing tire, a bladder drum is mainly used to turn up the sidewall of the tire. By inflating the bladder to bond the sidewall, the problem of indentation on the side of the tire can be avoided. However, the bladder drum has the problems that the replacement of the bladder is complicated, the bladder cost is high, and the molding quality of the tire bead is worse than that of the mechanical drum. Therefore, the rejection rate of the tire is high and the cost is still high. In the case of a mechanical drum, the pressure when rolling the sidewall is difficult to control, and quality problems such as wrinkles are likely to occur, so the applicability is low.

Summary of the Invention

[0003] Multiple embodiments of this application provide a roller turn-up mechanism and a mechanical drum to solve the problem of the prior art that wrinkles are likely to occur when the mechanical drum rolls the sidewall.

[0004] In one embodiment of the present application, a roller turning-up mechanism is provided. The roller turning-up mechanism is provided on a main shaft assembly and includes a plurality of first turning-up structures provided in the circumferential direction of the main shaft assembly. The first turning-up structure includes a roller assembly for rolling the sidewall of the tire, a first driving rod drivingly connected to the roller assembly, a first driving assembly connected to the first driving rod for driving the roller assembly to move in the radial direction of the tire by the first driving rod, a support assembly connected to the first driving rod for supporting the sidewall outside the roller turning-up mechanism, and a second driving assembly connected to the support assembly for driving the roller assembly by the support assembly to press the tire. The roller assembly is provided on the support assembly. In one preferred embodiment of the present application, the roller assembly is rotatably provided at one end of the support assembly, and the end of the support assembly close to the roller assembly is rotatably connected to the first driving rod. In one preferred embodiment of the present application, in addition to being connected to the second driving assembly, the first turning-up structure further includes a second driving rod rotatably connected to the first driving rod, and a third driving rod with one end rotatably connected to the end of the support assembly away from the roller assembly and the other end rotatably connected to the second driving rod. The second driving assembly drives the second driving rod to move, thereby moving and rotating the first driving rod and the third driving rod respectively.

[0005] In one preferred embodiment of the present application, in addition to being connected to the first driving assembly, the first turning-up structure further includes a fourth driving rod rotatably connected to the first driving rod. The first driving assembly drives the first driving rod to rotate by the fourth driving rod.

[0006] In one preferred embodiment of the present application, the fourth driving rod is movably provided along the axial direction of the main shaft assembly, and the first driving assembly drives the fourth driving rod to move in the axial direction of the main shaft assembly.

[0007] In one preferred embodiment of the present application, the support assembly includes a plurality of support rods, and the plurality of support rods are spaced apart in a direction perpendicular to the sidewall for supporting the sidewall.

[0008] In one preferred embodiment of the present application, the first turn-up structure further includes a plurality of drums provided in a one-to-one correspondence with each support rod, and the drums are rotatably fitted to the support rods.

[0009] In one preferred embodiment of the present application, the roller turn-up mechanism further includes a second turn-up structure. The first turn-up structure and the second turn-up structure respectively turn up and roll the sidewall. Here, the first turn-up structure is provided on the main shaft assembly, and the second turn-up structure is provided on one side of the main shaft assembly.

[0010] In one preferred embodiment of the present application, the second turn-up structure includes two suspension arms that are symmetrically spaced apart and a turn-up space is formed therebetween, and a third drive assembly connected to the two suspension arms for driving the two suspension arms to move simultaneously to roll the sidewalls on both sides of the tire.

[0011] According to another aspect of the present application, a mechanical drum is provided. The mechanical drum includes a main shaft assembly and two roller turn-up mechanisms. The two roller turn-up mechanisms are symmetrically provided with respect to the main shaft assembly, and the roller turn-up mechanism is the roller turn-up mechanism described above.

[0012] The roller assembly to which the technical solution of the present application is applied is provided on the support assembly. According to one embodiment, the roller assembly includes a roller or rollers. The roller is rotatably provided at an end close to the side wall of the support assembly. The second drive assembly can directly press the side wall by pushing the roller assembly. According to a second embodiment, the second drive assembly pushes the first drive rod. The first drive rod is connected to an end of the support assembly close to the roller assembly, and further pushes the roller assembly to press the side wall. According to a third embodiment, the roller is rotatably provided at an end close to the side wall of the support assembly. The end of the support assembly close to the roller assembly is rotatably connected to the first drive rod. The second drive assembly is simultaneously connected to the first drive rod and the support assembly, and applies pressure to the roller of the roller assembly by the first drive rod and the support assembly respectively to press the roller against the side wall.

Brief Description of the Drawings

[0013] The attached drawings of the specification constituting a part of the present application are used to provide a further understanding of the present application. The exemplary embodiments of the present application and their descriptions are used to interpret the present application, but do not constitute an inappropriate limitation to the present application. The attached drawings are as follows.

[0014]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0015] It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. Hereinafter, the present application will be described in detail with reference to the attached drawings in combination with the embodiments.

[0016] In order to solve the problem of the prior art that wrinkles are likely to occur when the mechanical drum rolls over the sidewall, the present application provides a roller turn-up mechanism and a mechanical drum.

[0017] Referring to FIGS. 1 to 2, the roller turn-up mechanism of the present application is provided on the main shaft assembly 10 and is mainly used to turn up a tire blank with a bead attached thereto and bond the sidewall to the side surface of the tire blank. By using a mechanical drum instead of a bladder turn-up and improving the mechanical drum turn-up structure, the stability of the roller turn-up mechanism is increased, and the sidewall 50 can be bonded to the tire blank with high quality. Specifically, it is provided as follows.

[0018] The roller turning-up mechanism of the present application includes a plurality of first turning-up structures 20 provided in the circumferential direction of the main shaft assembly 10. The first turning-up structure 20 includes a roller assembly 201, a first driving rod 21, a first driving assembly 211, a support assembly, and a second driving assembly 221. The roller assembly 201 is directly abutted against the sidewall 50 to roll-press the sidewall 50 of the tire, thereby being used to press the sidewall 50 against the tire blank. The first driving rod 21 is drivingly connected to the roller assembly 201, and the first driving assembly 211 is connected to the first driving rod 21. By driving and swinging the first driving rod 21, the roller assembly 201 is moved in the radial direction of the tire. The second driving assembly 221 pushes up the first driving rod 21 to press the roller assembly 201 against the tire. As a result, the roller assembly 201 always rolls along the contour of the side surface of the tire blank during the movement process, maintaining the contact with the tire blank. The stress situation of the structure at this time is that the second driving assembly 221 directly pushes up and swings the first driving rod 21 to move the upper roller assembly 201 to press the tire blank. By providing the above structure, the force transmission path is reduced, the force loss is reduced, the force transmission efficiency is improved, and thereby the sidewall 50 is more stably bonded.

[0019] Further, the roller assembly 201 of the present application is provided on the support assembly 25. According to one embodiment, the roller assembly 201 includes a roller or rollers. The roller is rotatably provided at an end close to the side wall 50 of the support assembly 25, and the second drive assembly 221 can directly press the side wall 50 by pushing the roller assembly 201. According to a second embodiment, the second drive assembly 221 pushes the first drive rod 21, and the first drive rod 21 is connected to an end of the support assembly 25 close to the roller assembly 201, and further pushes the roller assembly 201 to press the side wall 50. According to a third embodiment, as shown in FIG. 2, the roller is rotatably provided at an end close to the side wall 50 of the support assembly 25, and the end of the support assembly 25 close to the roller assembly 201 is rotatably connected to the first drive rod 21. The second drive assembly 221 is simultaneously connected to the first drive rod 21 and the support assembly 25, and the first drive rod 21 and the support assembly 25 respectively apply pressure to the roller of the roller assembly 201 to press the roller against the side wall 50.

[0020] After being lifted, the support assembly 25 forms an angle such that the end perpendicular to the tire sidewall 50 or the end away from the tire slopes upward, enabling better support for the sidewall 50 and effectively avoiding the situation where the sidewall 50 pressed by the rollers on the roller assembly 201 adheres to the tire blank. However, for the part of the sidewall 50 away from the rollers on the roller assembly 201, after the turn-up rod retracts, due to the shrinkage of the rubber material, grooves are formed in the part of the sidewall 50 close to the turned-up tire, and when the suspension arm presses later, wrinkles may occur when hitting the recess. Therefore, in this application, by providing the rollers on the roller assembly 201 at the end located on the sidewall 50 of the support assembly 25, the roller assembly 201 and the support assembly 25 are at the same distance from the center of the tire in the radial direction of the tire. When the suspension arm presses later, it continues to press following the pressing position of the roller assembly 201, and the sidewall 50 will not be pressed to cause wrinkles.

[0021] Both the first drive assembly 211 and the second drive assembly 221 described above are driven by cylinders.

[0022] The first turn-up structure 20 further includes a second drive rod 22 and a third drive rod 23. The second drive rod 22 is connected to the second drive assembly 221, and one end of the second drive rod 22 is rotatably connected to the first drive rod 21 to push up and swing the first drive rod 21. One end of the third drive rod 23 is rotatably connected to the end of the support assembly 25 away from the roller assembly 201, and the other end of the third drive rod 23 is rotatably connected to the second drive rod 22. The second drive assembly 221 drives the second drive rod 22 to move, thereby simultaneously moving and rotating the first drive rod 21 and the third drive rod 23. The first drive rod 21 and the third drive rod 23 rotate simultaneously to move and lift the upper support assembly 25 to support the sidewall 50 that has not been pressed.

[0023] To realize the movement of the roller assembly 201 along the side surface of the tire blank, a fourth drive rod 24 is also provided in the first turn-up structure 20 of the present application. The fourth drive rod 24 is connected to the first drive assembly 211, and the fourth drive rod 24 is also rotatably connected to the first drive rod 21. Here, the first drive assembly 211 drives the first drive rod 21 to rotate by the fourth drive rod 24. The first drive assembly 211 employs a cylinder, and the cylinder is provided on the spindle assembly 10. The fourth drive rod 24 is provided to be axially movable in the spindle assembly 10. When operating, the cylinder pushes the fourth drive rod 24 to move axially in the spindle assembly 10. The other end of the fourth drive rod 24 is hinged to the end of the first drive rod 21, and the other end of the first drive rod 21 abuts against the sidewall 50 by the roller assembly 201. The fourth drive rod 24 moves horizontally to drive the first drive rod 21 to swing, and presses the roller assembly 201 against the sidewall 50 to slide. Due to the swinging motion form, the jamming problem that occurs when the roller assembly 201 abuts against the recess or protrusion of the sidewall 50 is reduced.

[0024] One end of the first drive rod 21 is connected to the support assembly 25, and the other end of the first drive rod 21 is hinged to the fourth drive rod 24. Here, the second drive rod 22 is hinged to a portion between the support assembly 25 of the first drive rod 21 and the fourth drive rod 24. The roller assembly 201 is provided at an end close to the support assembly 25 of the first drive rod 21 or an end close to the sidewall 50 of the support assembly 25.

[0025] In this embodiment, by setting the connection positions of the fourth drive rod 24, the second drive rod 22, the support assembly 25 and the first drive rod 21, the roller assembly 201 can smoothly and stably press the side wall 50. Specifically, one end of the second drive rod 22 is hingedly connected to the first drive rod 21, and the other end of the second drive rod 22 is hingedly connected to the second drive assembly 221. Here, the third drive rod 23 and the second drive rod 22 are hingedly connected to a portion between the first drive rod 21 and the second drive assembly 221.

[0026] To support the unbonded portion of the side wall 50, a plurality of support rods are provided in the support assembly 25 of the present application. The plurality of support rods are spaced apart in a direction perpendicular to the side wall 50 in order to support the hanging side wall 50 as much as possible. Here, the first turn-up structure 20 further includes a plurality of drums provided in a one-to-one correspondence with each support rod, and the drums are rotatably fitted to the support rods so that the side wall 50 can slide.

[0027] In order for the roller assembly 201 to roll and press the side wall 50 better and more smoothly, in the present application, the roller assembly 201 is rotatably provided on the first drive rod 21 or the support assembly 25. Specifically, the roller assembly 201 includes an annular roller, and the roller is provided at the end of the first drive rod 21, or the roller is fitted to a support rod near one end of the side wall 50 of the support assembly 25.

[0028] In addition, in order to ensure the quality of the bonding between the side wall and the side surface of the tire blank, the link turn-up mechanism of the present application employs the first turn-up structure and the second turn-up structure to roll and press the side wall twice. In the case of the first rolling and pressing, the first turn-up structure is adopted to roll and press the side wall of the tire from the inside to the outside. After the first rolling and pressing is completed, the second turn-up structure is adopted to perform the second rolling and pressing on the side wall of the tire, and the second rolling and pressing is also performed from the inside to the outside.

[0029] The second turn-up structure 30 includes two suspension arms and a third drive assembly. The two suspension arms are symmetrically spaced apart. The two suspension arms may be provided to approach or separate from each other. A turn-up space is formed between the two suspension arms. When they approach each other, the ends of the suspension arms are attached to the sidewall 50, and the sidewall 50 and the side surface of the tire blank are attached to each other by rolling pressure. The third drive assembly is connected to the two suspension arms. The third drive assembly employs a cylinder to drive the two suspension arms to move simultaneously, and roll-presses the sidewalls 50 on both sides of the tire.

[0030] This application further provides a mechanical drum. The mechanical drum includes a spindle assembly 10 and two roller turn-up mechanisms. The two roller turn-up mechanisms are symmetrically provided with respect to the spindle assembly 10. The two turn-up structures respectively roll-press the sidewalls of the tire. The roller turn-up mechanism is the roller turn-up mechanism described above. This mechanical drum abandons the existing bladder turn-up form, and forms the roll-pressing on the sidewall 50 by a cylinder, a link mechanism and a roller assembly 201, so it has a long service life and saves costs.

[0031] In addition, the mechanical drum of this application further includes a lock ring structure 40. There are two lock ring structures 40, which are symmetrically provided with respect to the spindle assembly and are located between the two roller turn-up mechanisms. They are used to lock the bead of the tire to fix the tire blank.

[0032] The above is only a preferred embodiment of this application and is not intended to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle scope of this application should be included within the scope of this application.

Description of Reference Numerals

[0033] 10 Main shaft assembly 20 First turn-up structure 201 Roller assembly 21 First drive rod 211 First drive assembly 22 Second drive rod 221 Second drive assembly 23 Third drive rod 24 Fourth drive rod 25 Support assembly 30 Second turn-up structure 40 Lock ring structure 50 Side wall

Claims

1. A roller turning-up mechanism provided on a spindle assembly (10) and comprising a plurality of first turn-up structures (20) provided in the circumferential direction of the spindle assembly (10), wherein the first turn-up structure (20) comprises a roller assembly (201) for pressing the sidewall (50) of a tire, a first drive rod (21) drivingly connected to the roller assembly (201), and a first drive assembly (211) connected to the first drive rod (21) for driving the roller assembly (201) by the first drive rod (21) to move in the radial direction of the tire, a support assembly (25) connected to the first drive rod (21) for supporting the sidewall (50) outside the roller turning-up mechanism, and a second drive assembly (221) connected to the support assembly (25) for driving the roller assembly (201) by the support assembly (25) to press the tire, wherein the roller assembly (201) is provided on the support assembly (25), the roller assembly (201) is rotatably provided at one end of the support assembly (25), and the end of the support assembly (25) close to the roller assembly (201) is rotatably connected to the first drive rod (21), the first turn-up structure (20) further comprises a second drive rod (22) rotatably connected not only to the second drive assembly (221) but also to the first drive rod (21), and a third drive rod (23) having one end rotatably connected to the end of the support assembly (25) away from the roller assembly (201) and the other end rotatably connected to the second drive rod (22), wherein the second drive assembly (221) is characterized by driving the second drive rod (22) to move, thereby moving and rotating the first drive rod (21) and the third drive rod (23) respectively. A roller turning-up mechanism.

2. In addition to being connected to the first drive assembly (211), the first turn-up structure (20) further includes a fourth drive rod (24) that is also rotatably connected to the first drive rod (21). The first drive assembly (211) drives the first drive rod (21) to rotate by means of the fourth drive rod (24). The roller turn-up mechanism according to claim 1 is characterized in that.

3. The fourth drive rod (24) is provided so as to be movable in the axial direction of the main shaft assembly (10). The first drive assembly (211) drives the fourth drive rod (24) to move in the axial direction of the main shaft assembly (10). The roller turn-up mechanism according to claim 2 is characterized in that.

4. The support assembly (25) includes a plurality of support rods that are spaced apart in a direction perpendicular to the side wall (50) and support the side wall (50). The roller turn-up mechanism according to claim 1 is characterized in that.

5. The first turn-up structure (20) further includes a plurality of drums provided in a one-to-one correspondence with each of the support rods. The drums are rotatably fitted to the support rods. The roller turn-up mechanism according to claim 4 is characterized in that.

6. The roller turn-up mechanism further includes a second turn-up structure (30). The first turn-up structure (20) and the second turn-up structure (30) each turn up and roll press the side wall (50). The first turn-up structure (20) is provided on the main shaft assembly (10), and the second turn-up structure (30) is provided on one side of the main shaft assembly (10). The roller turn-up mechanism according to claim 1 is characterized in that.

7. The second turn-up structure (30) Two suspension arms that are symmetrically spaced apart and form a turn-up space therebetween, and A third drive assembly that is connected to the two suspension arms and drives the two suspension arms to move simultaneously to roll press the side walls (50) on both sides of the tire. The roller turn-up mechanism according to claim 6 is characterized in that.

8. A mechanical drum comprising a spindle assembly (10) and two roller turning-up mechanisms provided symmetrically with respect to the spindle assembly (10), wherein the roller turning-up mechanism is the roller turning-up mechanism according to any one of claims 1 to 7.

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