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 more particularly to roller turn-up mechanisms and machine drums. [Background technology]

[0002] When turning up existing tires, bladder drums are typically used to turn up the tire sidewalls. While inflating the bladders to bond the sidewalls can avoid the problem of tire sidewall indentations, bladder drums have problems with bladder replacement, high bladder costs, and poorer tire bead molding quality than mechanical drums, resulting in a high tire reject rate and high costs. Mechanical drums are less applicable because the pressure applied to the sidewalls is difficult to control, leading to quality issues such as wrinkles. Summary of the Invention

[0003] Some embodiments of the present application provide a roller turn-up mechanism and a mechanical drum to solve the problem in the prior art that wrinkles tend to occur when the mechanical drum rolls the sidewall.

[0004] In one embodiment of the present application, there is provided a roller turn-up mechanism, the roller turn-up mechanism being mounted on a main shaft assembly and comprising a plurality of first turn-up structures arranged circumferentially of the main shaft assembly, the first turn-up structures including: a roller assembly for rolling a sidewall of a tire; a first drive rod drivingly connected to the roller assembly; a first drive assembly connected to the first drive rod and for driving the roller assembly by the first drive rod to move it in the radial direction of the tire; a support assembly connected to the first drive rod and for supporting an outer sidewall of the roller turn-up mechanism; and a second drive assembly connected to the support assembly and for driving the roller assembly by the support assembly to press the tire, the roller assemblies being mounted on the support assembly. In one preferred embodiment of the present application, the roller assembly is rotatably mounted on one end of the support assembly, and the end of the support assembly proximate to the roller assembly is rotatably connected to the first drive rod. In one preferred embodiment of the present application, the first turn-up structure, in addition to being connected to the second drive assembly, further includes a second drive rod that is rotatably connected to the first drive rod, and a third drive rod that has one end rotatably connected to an end of the support assembly away from the roller assembly and the other end rotatably connected to the second drive rod, and the second drive assembly drives and moves the second drive rod, thereby moving and rotating the first drive rod and the third drive rod, respectively.

[0005] In one preferred embodiment of the present application, the first turn-up structure, in addition to being connected to the first drive assembly, further includes a fourth drive rod that is also rotatably connected to the first drive rod, and the first drive assembly drives and rotates the first drive rod by the fourth drive rod.

[0006] In one preferred embodiment of the present application, the fourth drive rod is provided to be movable along the axial direction of the spindle assembly, and the first drive assembly drives the fourth drive rod to move in the axial direction of the spindle assembly.

[0007] In one preferred embodiment of the present application, the support assembly includes a plurality of support rods, the plurality of support rods being spaced apart in a direction perpendicular to the sidewalls to support the sidewalls.

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

[0009] In one preferred embodiment of the present application, the roller turn-up mechanism further includes a second turn-up structure, and the first turn-up structure and the second turn-up structure turn up and roll the sidewall, respectively, where 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 to form a turn-up space therebetween, and a third drive assembly that is connected to the two suspension arms and drives and moves the two suspension arms simultaneously to roll on both sidewalls of the tire.

[0011] According to another aspect of the present application, there is provided a mechanical drum, the mechanical drum comprising a main shaft assembly and two roller turn-up mechanisms, the two roller turn-up mechanisms being symmetrically arranged on the main shaft assembly, and the roller turn-up mechanisms being the roller turn-up mechanisms described above.

[0012] The roller assembly to which the technical solution of the present application is applied is mounted on the support assembly. According to one embodiment, the roller assembly includes a roller or rollers, which are rotatably mounted on the end of the support assembly close to the sidewall, and a second drive assembly can push the roller assembly to directly press against the sidewall. According to a second embodiment, the second drive assembly pushes a first drive rod, which is connected to the end of the support assembly close to the roller assembly and further pushes the roller assembly to press against the sidewall. According to a third embodiment, a roller is rotatably mounted on the end of the support assembly close to the sidewall, which end of the support assembly close to the roller assembly is rotatably connected to the first drive rod, and a second drive assembly is simultaneously connected to the first drive rod and the support assembly, and the first drive rod and the support assembly respectively apply pressure to the roller of the roller assembly to press the roller against the sidewall. [Brief explanation of the drawings]

[0013] The accompanying drawings of the specification that form a part of this application are used to provide a further understanding of this application, and the exemplary embodiments and descriptions thereof are used to interpret this application but do not constitute undue limitations on this application.

[0014] [Figure 1] 1 is a schematic diagram showing the structure of an embodiment of a mechanical drum according to the present application; [Figure 2] 1 is a schematic diagram showing a portion of the structure of an embodiment of a roller turn-up mechanism according to the present application. FIG. DETAILED DESCRIPTION OF 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.The present application will be described in detail below in conjunction with the embodiments with reference to the accompanying drawings.

[0016] To solve the problem in the prior art that wrinkles are easily generated when the mechanical drum rolls the sidewall, the present application provides a roller turn-up mechanism and a mechanical drum.

[0017] 1 and 2, the roller turnup mechanism of the present application is provided on a spindle assembly 10 and is primarily used to turn up a tire blank with beads attached and bond a sidewall to the side of the tire blank. By using a mechanical drum instead of a bladder turnup and improving the mechanical drum turnup structure, the stability of the roller turnup mechanism is improved, allowing the sidewall 50 to be bonded to the tire blank with high quality. Specifically, it is provided as follows.

[0018] The roller turn-up mechanism of the present application includes a plurality of first turn-up structures 20 arranged circumferentially around the main shaft assembly 10. Each first turn-up structure 20 includes a roller assembly 201, a first drive rod 21, a first drive assembly 211, a support assembly, and a second drive assembly 221. The roller assembly 201 is used to directly contact the tire sidewall 50 to roll the tire sidewall 50, thereby pressing the sidewall 50 against the tire blank. The first drive rod 21 is drivingly connected to the roller assembly 201, and the first drive assembly 211 is connected to the first drive rod 21. The roller assembly 201 is moved in the radial direction of the tire by driving and swinging the first drive rod 21. The second drive assembly 221 pushes up the first drive rod 21, pressing the roller assembly 201 against the tire. As a result, the roller assembly 201 always rolls along the contour of the side of the tire blank during movement, maintaining contact with the tire blank. The stress situation of this structure is that the second driving assembly 221 directly pushes up and swings the first driving rod 21, thereby moving the upper roller assembly 201 and pressing the tire blank. The above structure reduces the force transmission path, reduces force loss, and improves force transmission efficiency, thereby making the sidewall 50 more stable when laminating.

[0019] The roller assembly 201 of the present application is also provided on the support assembly 25. According to one embodiment, the roller assembly 201 includes a roller. The roller is rotatably provided on an end of the support assembly 25 close to the sidewall 50, and the second drive assembly 221 can directly press the sidewall 50 by pushing the roller assembly 201. According to a second embodiment, the second drive assembly 221 pushes the first drive rod 21, which 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 sidewall 50. According to a third embodiment, as shown in FIG. 2 , a roller is rotatably provided on an end of the support assembly 25 close to the sidewall 50, 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 applies pressure to the rollers of the roller assembly 201 through the first drive rod 21 and the support assembly 25, respectively, to press the rollers against the sidewall 50.

[0020] After the support assembly 25 is lifted, the end perpendicular to the tire sidewall 50 or the end away from the tire forms an upward inclined angle, which allows the sidewall 50 to be supported in a better shape and effectively prevents the sidewall 50 pressed by the rollers on the roller assembly 201 from being stuck to the tire blank. However, after the turn-up rod retracts, a groove may form in the portion of the sidewall 50 away from the rollers on the roller assembly 201 near the tire after the sidewall 50 is turned up due to contraction of the rubber material. When the suspension arm is pressed later, the groove may cause wrinkles when it hits the depression. Therefore, in the present application, the rollers on the roller assembly 201 are provided at the end of the support assembly 25 located at the sidewall 50. This ensures that the roller assembly 201 and the support assembly 25 are at the same radial distance from the center of the tire. Therefore, when the suspension arm rolls later, the roller assembly 201 continues to roll following the rolling position of the roller assembly 201, preventing the sidewall 50 from being pressed and causing wrinkles.

[0021] Both the first drive assembly 211 and the second drive assembly 221 mentioned 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 a second drive assembly 221. 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 an end of the support assembly 25 remote 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 and moves the second drive rod 22, 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 and support the uncompacted sidewall 50.

[0023] To move the roller assembly 201 along the side of the tire blank, the first turn-up structure 20 of the present application also includes a fourth drive rod 24. The fourth drive rod 24 is connected to a first drive assembly 211, which 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, which is provided in the spindle assembly 10. The fourth drive rod 24 is axially movable on the spindle assembly 10, and when operating, the cylinder pushes the fourth drive rod 24 to move in the axial direction of the spindle assembly 10. The other end of the fourth drive rod 24 is hingedly connected 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, pressing the roller assembly 201 against the sidewall 50 and causing it to slide. The swinging motion reduces the problem of jamming that occurs when the roller assembly 201 hits a recess or protrusion in the sidewall 50.

[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 hingedly connected to the fourth drive rod 24. Here, the second drive rod 22 is hingedly connected to a portion of the first drive rod 21 between the support assembly 25 and the fourth drive rod 24. The roller assembly 201 is provided at the end of the first drive rod 21 closer to the support assembly 25 or at the end of the support assembly 25 closer to the sidewall 50.

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

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

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

[0028] Furthermore, to ensure the quality of the bonding between the sidewall and the side of the tire blank, the link turn-up mechanism of the present application employs a first turn-up structure and a second turn-up structure to compress the sidewall twice. For the first compression, the first turn-up structure is employed to compress the tire sidewall from the inside to the outside, and after the first compression is completed, the second turn-up structure is employed to compress the tire sidewall a second time, also 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 spaced symmetrically and may be spaced apart or close to each other. A turn-up space is formed between the two suspension arms. When the two suspension arms are close to each other, the ends of the suspension arms contact the sidewalls 50 and roll-pressure the sidewalls 50 against the sides of the tire blank. The third drive assembly is connected to the two suspension arms and uses a cylinder to simultaneously drive and move the two suspension arms, thereby rolling-pressing the sidewalls 50 on both sides of the tire.

[0030] The present application further provides a mechanical drum, which includes a main shaft assembly 10 and two roller turn-up mechanisms. The two roller turn-up mechanisms are symmetrically mounted on the main shaft assembly 10, and the two turn-up structures respectively roll on the tire sidewalls, and the roller turn-up mechanisms are the roller turn-up mechanisms described above. This mechanical drum abandons the existing bladder turn-up configuration and uses a cylinder, a link mechanism, and a roller assembly 201 to form rolling pressure on the sidewalls 50, thereby extending the service life and saving costs.

[0031] The machine drum of the present application further includes a lock ring structure 40. Two lock ring structures 40 are provided symmetrically on the main shaft assembly, located between the two roller turn-up mechanisms, and used to lock the tire beads and secure the tire blank.

[0032] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of the present application. [Explanation of symbols]

[0033] 10 Spindle 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 sidewall

Claims

1. A roller turn-up mechanism provided on a main shaft assembly (10) and including a plurality of first turn-up structures (20) provided in a circumferential direction of the main shaft assembly (10), The first turn-up structure (20) comprises: a roller assembly (201) for rolling the tire sidewall (50); 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 it in the radial direction of the tire; a support assembly (25) connected to the first drive rod (21) for supporting an outer sidewall (50) of the roller turn-up mechanism; a second drive assembly (221) connected to the support assembly (25) for driving the roller assembly (201) through the support assembly (25) to press the tire; wherein the roller assembly (201) is mounted on the support assembly (25); The roller assembly (201) is rotatably mounted on one end of the support assembly (25), and an 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) comprises: a second drive rod (22) that is rotatably connected to the first drive rod (21) in addition to being connected to the second drive assembly (221); a third drive rod (23) having one end rotatably connected to the end of the support assembly (25) remote from the roller assembly (201) and the other end rotatably connected to the second drive rod (22); Here, the second drive assembly (221) drives and moves the second drive rod (22), thereby moving and rotating the first drive rod (21) and the third drive rod (23), respectively.

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

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

4. 2. The roller turn-up mechanism of claim 1, wherein the support assembly (25) includes a plurality of support rods spaced apart in a direction perpendicular to the sidewalls (50) to support the sidewalls (50).

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

6. 2. The roller turn-up mechanism according to claim 1, further comprising a second turn-up structure (30), wherein the first turn-up structure (20) and the second turn-up structure (30) turn up and roll the sidewall (50), respectively, the first turn-up structure (20) being provided on the main shaft assembly (10), and the second turn-up structure (30) being provided on one side of the main shaft assembly (10).

7. The second turn-up structure (30) comprises: two suspension arms spaced symmetrically apart to define a turn-up space therebetween; and a third drive assembly connected to the two suspension arms for simultaneously driving and moving the two suspension arms to roll on the sidewalls (50) on both sides of the tire.

8. A machine drum comprising a main shaft assembly (10) and two roller turn-up mechanisms symmetrically provided on the main shaft assembly (10), characterized in that the roller turn-up mechanisms are roller turn-up mechanisms according to any one of claims 1 to 7.

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