Forward and reverse wrapping device and agricultural tire forming machine

Abstract

The invention provides a forward and reverse wrapping device and a farm tire forming machine. The forward and reverse wrapping device comprises a plurality of forward wrapping finger assemblies, the forward wrapping finger assemblies are arranged in the circumferential direction of the forward and reverse wrapping device and form a ring shape, the forward wrapping finger assemblies can expand and shrink in the radial direction so as to change the size of the ring shape, and each forward wrapping finger assembly comprises a mounting base and a finger-shaped piece which is rotationally connected with the mounting base; each finger-shaped piece is provided with a rigid part and an elastic part capable of deforming, the rigid parts and the elastic parts are arranged in the circumferential direction of the forward and reverse wrapping device, in the two finger-shaped pieces of every two adjacent forward wrapping finger assemblies, the elastic part of one finger-shaped piece is overlapped with the rigid part of the other finger-shaped piece, and when the forward and reverse wrapping device expands and shrinks in the radial direction, the elastic part of the other finger-shaped piece is overlapped with the rigid part of the other finger-shaped piece. The size of the overlapping area between the elastic part and the rigid part is changed. The problem that in the prior art, the forward and reverse wrapping finger of the forward and reverse wrapping device cannot be used in a cross-inch level mode is solved.

Description

Technical Field

[0001] This invention relates to the field of tire processing, and more specifically, to a front and back wrapping device and a tire forming machine. Background Technology

[0002] Tire forming machines are specialized equipment used in the production of radial tires to laminate, roll, and shape rubber sheets into green tire blanks. Forming machines can be categorized into large-diameter lamination processes and small-diameter lamination processes based on the diameter of the ply lamination. Large-diameter lamination processes are generally used in two-stage forming machines. The process involves, after laminating the ply, using a positive wrapping finger to gather the ply hanging on both sides of the drum, allowing the bead to pass smoothly and adhere to the drum's sidewall. Then, the bladder expands, and under the thrust of the booster ring, the tire carcass ply is reversed and wrapped.

[0003] The forward and reverse wrapping device is mainly used in two-stage tire forming machines to achieve tire body forming. Because tire factories produce a wide variety of tire sizes, frequent cross-size production is required. However, current forward and reverse wrapping devices typically require changing the tooling for each size, making cross-size production impossible. For large tire production equipment such as agricultural and engineering tires, the tooling is bulky and difficult to change. Therefore, minimizing or eliminating tooling changes is urgently needed.

[0004] By adding a drive component to the positive and negative wrapping device to drive the expansion and contraction of the retaining ring assembly and the positive and negative wrapping assembly, a positive wrapping finger is needed during the positive wrapping of the tire. In the prior art, positive wrapping fingers are divided into traditional rigid positive wrapping fingers, which are made of thick-walled 40Cr or 45 steel, and semi-steel forming machine elastic positive wrapping fingers (soft), which are made of 0.8mm thick stainless steel sheets.

[0005] However, rigid positive wrapping fingers cannot be used across different sizes. If they do not expand / contract within their theoretical base circle diameter, they will get stuck due to interference between the finger-shaped pieces. Elastic positive wrapping fingers (stainless steel sheet type), due to their thinner walls, are only suitable for thinner semi-steel tire carcass compounds with smaller overhangs. Agricultural tires are large in size with long cord overhangs, making it difficult for elastic sheets to complete the process movements, thus failing to meet the requirements of cross-size production for positive and negative wrapping devices. Summary of the Invention

[0006] The main objective of this invention is to provide a positive and negative wrapping device and a seed tire forming machine to solve the problem that the positive wrapping finger of the existing positive and negative wrapping device cannot be used across different sizes.

[0007] To achieve the above objectives, according to one aspect of the present invention, a positive and negative wrapping device is provided for a seed tire forming machine, comprising a plurality of positive wrapping finger assemblies, each positive wrapping finger assembly being arranged circumferentially along the positive and negative wrapping device to form a ring, and the positive wrapping finger assembly being radially expandable and contractible to change the size of the ring. The positive wrapping finger assembly includes: a mounting base and finger-shaped pieces, the finger-shaped pieces being rotatably connected to the mounting base, the finger-shaped pieces having a rigid portion and a deformable elastic portion, the rigid portion and the elastic portion being arranged circumferentially along the positive and negative wrapping device, in two adjacent positive wrapping finger assemblies, the elastic portion of one finger-shaped piece overlaps with the rigid portion of the other finger-shaped piece, and the area of ​​overlap between the elastic portion and the rigid portion changes when the positive and negative wrapping device expands and contracts radially.

[0008] Furthermore, along the circumference of the positive and negative wrapping device, the thickness of the rigid part gradually decreases in the direction away from the elastic part.

[0009] Furthermore, along the radial direction of the positive and negative wrapping device, in the two finger pieces of two adjacent positive wrapping finger assemblies, the elastic part of one finger piece is located inside the rigid part of the other finger piece.

[0010] Furthermore, both the rigid and elastic parts are arc-shaped.

[0011] Furthermore, the finger-shaped piece includes a connecting rod portion and a plate-shaped portion, the connecting rod portion is connected to the plate-shaped portion, the connecting rod portion is rotatably connected to the mounting base, and the plate-shaped portion has a rigid portion and an elastic portion.

[0012] Furthermore, the connecting rod portion is connected to the rigid portion of the plate-shaped portion.

[0013] Furthermore, the positive-finger assembly also includes: a push rod, which is rotatably connected to the finger piece; and an elastic element, which abuts against the push rod and provides the push rod with a spring force that drives the finger piece to expand and rotate radially.

[0014] Furthermore, the positive wrapping component also includes: a slide block, which abuts against the elastic element, and the mounting base has a groove extending along the axial direction of the positive and negative wrapping device, with the slide block movably connected to the groove; and an adjusting member, which is movably connected to the mounting base and abuts against the slide block, and when the adjusting member is activated, it drives the slide block to move along the groove to change the initial preload of the elastic element.

[0015] Furthermore, the front and back wrapping device also includes an annular fixing frame; multiple buckle ring assemblies, each buckle ring assembly is spaced apart along the circumference of the fixing frame, the buckle ring assemblies are radially movable relative to the fixing frame, and the buckle ring assemblies have buckle ends for buckling; a front wrapping finger assembly is connected to the inner side of the buckle ring assemblies and can move radially along the fixing frame under the drive of the buckle ring assemblies, the front wrapping finger assembly is axially movable relative to the buckle ring assemblies, the front wrapping finger assembly includes finger-shaped pieces, the finger-shaped pieces have a contracted state that is radially retracted by being limited by the buckle end, and an unfolded state that is radially expanded and rotated to avoid the buckle end, the finger-shaped pieces switch between the contracted state and the unfolded state when the front wrapping finger assembly moves axially relative to the buckle ring assembly; and a driving assembly, the driving assembly is drivenly connected to the buckle ring assembly and drives the buckle ring assembly to move radially.

[0016] Furthermore, the buckle ring assembly includes a frame, which is movably connected to a fixed frame and a positive ring assembly. The frame has a driving ramp, which forms an angle with the axial direction of the fixed frame. The driving assembly includes a driving member, the output end of which is drivenly connected to the driving ramp, and there is a guide rail structure between the output end and the driving ramp. The output end is movably arranged along the axial direction of the fixed frame and drives the frame to move radially through the driving ramp when moving.

[0017] Furthermore, the drive assembly also includes a transmission component, which is driven to connect with the drive component and is located between the output end and the guide rail structure. The output end drives the frame to move radially through the transmission component. The transmission component is ring-shaped, and all the drive ramps are driven to connect to different positions around the circumference of the transmission component. When the transmission component moves along the axial direction of the fixed frame, it drives the frame of all the buckle ring assemblies to move radially synchronously.

[0018] Furthermore, a first guide structure is provided between the frame and the fixed frame, the first guide structure extending radially along the fixed frame, and a second guide structure is provided between the frame and the positive-finger assembly, the second guide structure extending axially along the fixed frame.

[0019] Furthermore, the buckle ring assembly also includes: a buckle ring stop, which is connected to the frame and moves synchronously with the frame, the buckle ring stop having a buckle end, the buckle end having a recess for placing a support steel ring; and a wear-resistant part, which is disposed on the side of the buckle ring stop facing the finger piece and abuts against the finger piece.

[0020] According to another aspect of the present invention, a seed tire forming machine is provided, comprising the aforementioned positive and negative wrapping device.

[0021] By applying the technical solution of this invention, the following technical effects are achieved:

[0022] 1. By designing the positive envelope finger to combine a rigid part and an elastic part, the problem that pure rigid finger plates cannot be used across size ranges in the existing technology is solved, while pure elastic finger plates cannot meet the process stiffness requirements.

[0023] 2. Since the elastic part will undergo elastic deformation, if the connecting rod part is connected to the connecting rod part, the position of the plate part will be affected by the elastic deformation of the elastic part. Therefore, the connecting rod part is connected to the rigid part to increase the stability of the connection between the plate part and the connecting rod part.

[0024] 3. As the diameter of the circle formed by multiple finger-shaped pieces increases, the area of ​​the stacked part of the elastic part and the rigid part gradually decreases. Since the thickness of the rigid part gradually decreases in the direction away from the elastic part, the deformation of the elastic part gradually decreases, making the circle formed by the finger-shaped pieces closer to a true circle.

[0025] 4. By driving the radial movement of the retaining ring assembly and the positive finger assembly through the drive component, the stop diameter of the retaining ring assembly and the diameter of the ring formed by the positive finger assembly can be changed, thereby adapting to tires of different sizes. There is no need to stop the machine to replace the positive finger assembly and retaining ring assembly, etc., reducing workload and time spent on replacing parts, improving overall production efficiency, and solving the problem of production time delays caused by frequent tooling changes in the existing technology.

[0026] 5. Since the range of variation between the stop diameter of the retaining ring assembly and the diameter of the ring formed by the positive wrapping finger assembly is related to the radial movement of the retaining ring assembly, and the radial movement of the retaining ring is a continuous movement, it can stop at any position within its movement range under the drive of the drive assembly. Therefore, this application can be adapted to a variety of tires of different sizes, not limited to one or two types, and has a wide range of applications. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 A schematic diagram of the overall structure of the positive and negative packaging device provided in this application;

[0029] Figure 2 A front view of the front and back packaging device provided in this application;

[0030] Figure 3 A cross-sectional view of the maximum size of the front and back wrapping device provided in this application, with the front wrapping finger retracted;

[0031] Figure 4 The minimum dimensions of the front and back packaging device provided in this application, and a cross-sectional view of the front packaging when it is retracted;

[0032] Figure 5 This is a schematic diagram of the buckle ring assembly of the front and back wrapping device;

[0033] Figure 6 The minimum dimensions of the front and back wrapping device provided in this application, and a cross-sectional view of the front wrapping finger when it is open;

[0034] Figure 7 This is a schematic diagram of the forward wrapping component of the forward and reverse wrapping device;

[0035] Figure 8 This is an isometric view of the structure of the positive enclosed finger described in an embodiment of the present invention;

[0036] Figure 9 A large-scale front view of the positive envelope finger as described in this embodiment of the invention;

[0037] Figure 10 for Figure 9 Enlarged view of part A;

[0038] Figure 11 This is a front view of the small-sized state of the positive envelope finger according to an embodiment of the present invention;

[0039] Figure 12 for Figure 11 Enlarged view of part B.

[0040] The above figures include the following reference numerals:

[0041] 1. Fixed frame; 2. Buckle ring assembly; 21. Frame body; 211. Drive ramp; 22. Guide rail structure; 23. First guide structure; 24. Second guide structure; 25. Buckle ring stop; 26. Wear-resistant part; 3. Positive finger assembly; 31. Positive finger; 311. Connecting rod part; 312. Plate part; 313. Rigid part; 314. Elastic part; 32. Mounting base; 33. Push rod; 34. Elastic part; 35. Slide; 36. Adjusting part; 4. Drive assembly; 41. Transmission part. Detailed Implementation

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0044] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0045] To address the problem that rigid finger sheets cannot be used across different sizes in the prior art, while flexible finger sheets cannot meet the process stiffness requirements, this application provides a positive and negative wrapping device and a tire forming machine. By setting the positive wrapping finger in a form where elastic and rigid parts coexist, the problems in the prior art are overcome.

[0046] Example 1

[0047] A reverse packaging device, see Figures 1 to 12 The device includes multiple positive-wrapping finger components 3, each of which is arranged in a ring along the circumference of the positive-reverse wrapping device. The positive-wrapping finger components 3 are radially expandable and contractible to change the size of the ring. The positive-wrapping finger 31 includes a mounting base 32 and a finger-shaped piece. The finger-shaped piece is rotatably connected to the mounting base 32. The finger-shaped piece has a rigid part 313 and a deformable elastic part 314. The rigid part 313 and the elastic part 314 are arranged in a ring along the circumference of the positive-reverse wrapping device. In the two finger-shaped pieces of two adjacent positive-wrapping finger components 3, the elastic part 314 of one finger-shaped piece overlaps with the rigid part 313 of the other finger-shaped piece. When the positive-reverse wrapping device expands and contracts radially, the area of ​​overlap between the elastic part 314 and the rigid part 313 changes.

[0048] Because the radial expansion and contraction of the positive-wrapping finger assembly 3 allows it to adapt to tires of different sizes. When the size of the tire requiring positive-reverse wrapping changes, the positive-wrapping finger assembly 3, which performs the positive-reverse wrapping process, also needs to be adapted, especially the positive-wrapping finger 31, which is a key component. By changing the size of the overlapping area between the elastic part 314 and the rigid part 313, the diameters of the circles fitted by the multiple positive-wrapping fingers 31 are different, thus adapting to tires of different sizes.

[0049] When a small tire is wrapped in a straight-sided manner, the area of ​​overlap between the elastic part 314 and the rigid part 313 is large. In this case, the elastic part 314 of the straight-sided finger 31 overlaps with the inner side of the rigid part 313 of the adjacent straight-sided finger 31. In this way, the circumference diameter formed by the multiple elastic parts 314 and rigid parts 313 is small.

[0050] When a larger tire is wrapped, the overlapping area of ​​the elastic part 314 and the rigid part 313 of two adjacent wrapping fingers 31 changes. The overlapping area of ​​the elastic part 314 and the rigid part 313 is smaller, which makes the deformation of the elastic part 314 smaller. Thus, the circumference diameter formed by multiple elastic parts 314 and rigid parts 313 is larger.

[0051] By designing the positive envelope finger 31 to combine a rigid part 313 with an elastic part 314, the problem that purely rigid finger sheets cannot be used across size ranges in the prior art, while purely elastic finger sheets cannot meet the process stiffness requirements, is solved.

[0052] Furthermore, along the circumference of the positive and negative wrapping device, the thickness of the rigid part 313 gradually decreases in the direction away from the elastic part 314.

[0053] Furthermore, along the radial direction of the positive and negative wrapping device, in the two finger-shaped pieces of two adjacent positive wrapping finger assemblies 3, the elastic part 314 of one finger-shaped piece is located inside the rigid part 313 of the other finger-shaped piece.

[0054] When the elastic part 314 and the rigid part 313 are stacked, the elastic part 314 will be located on the side of the rigid part 313 closer to the axis of the forward and reverse wrapping device. At this time, the rigid part 313 will limit the elastic part 314 to a certain extent. The area of ​​the stacked portion of the elastic part 314 and the rigid part 313 is inversely proportional to the size of the tire to be processed. That is, the larger the size of the tire to be processed, the smaller the area of ​​the stacked portion of the elastic part 314 and the rigid part 313. The circle formed by the multiple finger-shaped pieces is positively correlated with the size of the tire.

[0055] As the diameter of the circle formed by multiple finger-shaped pieces increases, the area of ​​the stacked portion of the elastic part 314 and the rigid part 313 gradually decreases. Since the thickness of the rigid part 313 gradually decreases in the direction away from the elastic part 314, the deformation of the elastic part 314 gradually decreases, making the circle formed by the finger-shaped pieces closer to a true circle.

[0056] Furthermore, both the rigid part 313 and the elastic part 314 are arc-shaped.

[0057] When multiple finger-shaped pieces surround each other, the shape formed by the surrounding pieces will be closer to a true circle because both the rigid part 313 and the elastic part 314 are arc-shaped.

[0058] In this application, the finger-shaped piece includes a connecting rod portion 311 and a plate-shaped portion 312. The connecting rod portion 311 is connected to the plate-shaped portion 312. The connecting rod portion 311 is rotatably connected to the mounting base 32. The plate-shaped portion 312 has a rigid portion 313 and an elastic portion 314.

[0059] During the process of wrapping the entire tire in both directions, to reduce interference with other parts, the finger piece needs to be located away from the main shaft of the wrapping device when not in operation. Therefore, the finger piece needs to be rotatably connected to the mounting base 32 to meet this requirement. To facilitate the rotation of the finger piece, it is configured as a plate-shaped part 312 and a connecting rod part 311. The plate-shaped part 312 is used for the wrapping process, and the connecting rod part 311 is used to facilitate the rotation of the entire finger piece. By configuring the finger piece as a plate-shaped part 312 and a connecting rod part 311, the rotation between the finger piece and the mounting base 32 is facilitated.

[0060] Furthermore, the connecting rod portion 311 is connected to the rigid portion 313 of the plate-shaped portion 312.

[0061] Since the elastic part 314 will undergo elastic deformation, if the connecting rod part 311 is connected to the connecting rod part 312, the position of the plate part 312 will be affected by the elastic deformation of the elastic part 314. Therefore, the connecting rod part 311 is connected to the rigid part 313 to increase the stability of the connection between the plate part 312 and the connecting rod part 311.

[0062] In this application, the positive-finger assembly 3 also includes a push rod 33 and an elastic element 34. The push rod 33 is rotatably connected to the finger piece, and the elastic element 34 abuts against the push rod 33 and provides the push rod 33 with a spring force that drives the finger piece to expand and rotate radially.

[0063] When the positive wrapping finger assembly 3 performs the positive wrapping operation on the tire, the end of the finger piece away from the mounting base 32 rotates towards the axis of the positive and negative wrapping device, at which time the finger piece compresses the elastic element 34. Before the next positive wrapping, the positive wrapping finger assembly 3 moves axially relative to the retaining ring assembly 2, causing the retaining ring assembly 2 to disengage from the finger piece. The finger piece flips and unfolds under the action of the elastic element 34, so that when the retaining ring assembly 2 moves axially in subsequent cycles, it can squeeze the finger piece from the outside to achieve the positive wrapping action.

[0064] Furthermore, the positive-finger assembly 3 also includes a slide 35 and an adjusting member 36. The slide 35 abuts against the elastic member 34. The mounting base 32 has a groove extending along the axial direction of the fixed frame 1. The slide 35 is movably connected to the groove. The adjusting member 36 is movably connected to the mounting base 32 and abuts against the slide 35. When the adjusting member 36 moves, it drives the slide 35 to move along the groove to change the initial preload of the elastic member 34.

[0065] When different sizes of tires need to be wrapped in either direction, the diameter of the circle formed by the wrapping finger assembly 3 needs to be adjusted accordingly to match the tire size. Similarly, different tire sizes result in different angles of rotation of the end of the finger piece away from the mounting base 32 towards the axis of the wrapping device, leading to different degrees of compression of the elastic element 34 and affecting its performance. By adjusting the position of the slide block 35 using the adjusting component 36, the compression degree of the elastic element 34 can be adjusted to accommodate tires of different sizes.

[0066] In this application, the front and back wrapping device further includes an annular fixed frame 1, multiple buckle ring assemblies 2, and a drive assembly 4. Each buckle ring assembly 2 is spaced apart along the circumference of the fixed frame 1 and is radially movable relative to the fixed frame 1. Each buckle ring assembly 2 has a buckle end for buckling. The front wrapping finger assembly 3 is connected to the inner side of the buckle ring assembly 2 and can move radially along the fixed frame 1 under the drive of the buckle ring assembly 2. The front wrapping finger assembly 3 is axially movable relative to the buckle ring assembly 2 and includes finger-shaped pieces. The finger-shaped pieces have a contracted state where they are radially retracted and limited by the buckle end, and an expanded state where they radially expand and rotate to avoid the buckle end. When the front wrapping finger assembly 3 moves axially relative to the buckle ring assembly 2, the finger-shaped pieces switch between the contracted state and the expanded state. The drive assembly 4 is drivenly connected to the buckle ring assembly 2 and drives the buckle ring assembly 2 to move radially.

[0067] The large-diameter, two-stage ply fabric wrapping process involves the following steps: after the ply fabric is bonded, the wrapping finger assembly 3 extends and opens, then the bead ring assembly 2 moves towards the drum to gather and contract the wrapping fingers 31, finally securing the tire bead to the drum side. The stop diameter of the bead ring assembly 2 is correlated with the diameter of the ring formed by the wrapping fingers 3. Therefore, when the tire compound changes the bead diameter, both the stop diameter of the bead ring assembly 2 and the diameter of the wrapping fingers 3 need to expand or contract to match the compound parameters. To achieve automatic size change, the wrapping fingers 3 and the bead ring assembly 2 are designed to expand or contract together. Driven by the drive assembly 4, they contract or expand simultaneously to adapt to tires of different sizes. Subsequently, the power unit drives the wrapping fingers 3 and the bead ring assembly 2 axially to perform the wrapping of the tire in both directions.

[0068] When the size of the tire requiring reversible wrapping changes, the diameter of the stop hole of the bead ring assembly 2 and the diameter of the ring formed by the reversible wrapping finger assembly 3 need to be adjusted to match the tire with the changed size. At this time, the drive assembly 4 needs to operate, moving the bead ring assembly 2 radially along the fixing frame 1, changing the stop hole diameter of the bead ring assembly 2 to match the specifications of the tire to be reversibly wrapped. Since the reversible wrapping finger assembly 3 is connected to the inner side of the bead ring assembly 2, when the stop hole diameter of the bead ring assembly 2 changes, the reversible wrapping finger assembly 3 will change accordingly to match the specifications of the tire to be reversibly wrapped.

[0069] By driving the radial movement of the retaining ring assembly 2 and the positive finger assembly 3 through the drive component 4, the diameter of the stop of the retaining ring assembly 2 and the diameter of the ring formed by the positive finger assembly 3 can be changed, thereby adapting to tires of different sizes. There is no need to stop the machine to replace the positive finger assembly 3 and the retaining ring assembly, which reduces the workload and the time spent on replacing parts, improves the overall production efficiency, and solves the problem of production time delays caused by frequent tooling changes in the existing technology.

[0070] Since the range of variation between the stop diameter of the retaining ring assembly 2 and the diameter of the ring formed by the positive wrapping finger assembly 3 is related to the radial movement of the retaining ring assembly 2, and the radial movement of the retaining ring is a continuous movement, it can stop at any position within its movement range under the drive of the drive assembly 4. Therefore, this application can be adapted to a variety of tires of different sizes, not limited to one or two types, and has a wide range of applications.

[0071] Furthermore, the buckle ring assembly 2 includes a frame 21, which is movably connected to the fixed frame 1 and the positive finger assembly 3. The frame 21 has a driving inclined surface 211, which forms an angle with the axial direction of the fixed frame 1. The driving assembly 4 includes a driving member, the output end of which is drivenly connected to the driving inclined surface 211, and a guide rail structure 22 is provided between the output end and the driving inclined surface 211. The output end is movably arranged along the axial direction of the fixed frame 1 and drives the frame 21 to move radially through the driving inclined surface 211 when moving.

[0072] The drive assembly 4 drives the frame 21 to move along the axial direction of the fixed frame 1. Since the frame 21 has a drive inclined surface 211 and the inclined surface forms an angle with the axial direction of the fixed frame 1, the rotation of the inclined surface will convert the movement of part of the frame 21 along the axial direction of the fixed frame 1 into the movement of the fixed frame 1 in the radial direction, thereby realizing the movement of the fixed frame 1 in the radial direction.

[0073] After the drive component 4 is activated, it will cause the output end of the drive component 4 to move relative to the frame 21. Since the frame 21 has a drive ramp 211, and the output end of the drive component 4 cooperates with the drive ramp 211, when the frame 21 moves, the output end of the drive component 4 will move relative to the drive ramp 211. By setting a guide rail between the output end of the drive component and the drive ramp 211, the relative displacement between the output end of the drive component and the drive ramp 211 can be limited, preventing misalignment in the circumferential direction of the fixed frame 1 and increasing the stability of the relative displacement between them.

[0074] Furthermore, the drive assembly 4 also includes a transmission component 41, which is driven to connect with the drive component and is located between the output end and the guide rail structure 22. The output end drives the frame 21 to move radially through the transmission component 41. The transmission component 41 is annular, and all the drive ramps 211 are driven to connect to different positions around the transmission component 41. When the transmission component 41 moves along the axial direction of the fixed frame 1, it drives the frame 21 of all the buckle assemblies to move radially synchronously.

[0075] The transmission component 41 serves a transmission function, transmitting the power from the drive component to the frame 21. Moving the transmission component 41 causes the frame 21 to move. Since the drive ramps 211 of all frames 21 are connected to the transmission component 41, when the transmission component 41 moves, it can drive all frames 21 to move together. This increases the synchronicity of movement of frames 21 located at different positions on the fixed frame 1, ensuring that the stop diameter of the retaining ring assembly 2 remains a complete circle even after changes in stop diameter. This prevents asynchronous movement of individual retaining ring assemblies 2 from affecting the subsequent processing of the tire's front and back wrapping.

[0076] Furthermore, a first guide structure 23 is provided between the frame 21 and the fixed frame 1, the first guide structure 23 extends radially along the fixed frame 1, and a second guide structure 24 is provided between the frame 21 and the positive-finger assembly 3, the second guide structure 24 extends axially along the fixed frame 1.

[0077] The first guide structure 23 can limit the movement of the frame 21, prevent the frame 21 from shifting in the circumferential direction of the fixed frame 1, and increase the stability of the buckle ring assembly 2 when it contracts or expands.

[0078] The second guide structure 24 can limit the movement of the positive envelope finger 31, so that the positive envelope finger assembly 3 can only move along the axial direction of the fixed frame 1, thereby increasing the stability of the movement of the positive envelope finger assembly 3.

[0079] Furthermore, the buckle ring assembly 2 also includes a buckle ring stop and a wear-resistant part 26. The buckle ring stop is connected to the frame 21 and moves synchronously with the frame 21. The buckle ring stop has a buckle ring end, which has a recess for placing a support steel ring. The wear-resistant part 26 is disposed on the side of the buckle ring stop facing the finger piece and abuts against the finger piece.

[0080] The recess on the end of the rim facilitates the engagement of the rim stop 25 with the steel rim, thereby enabling the rim fastening and wrapping process of the tire.

[0081] The wear-resistant component 26 serves a protective function. During operation, the retaining ring assembly 2 undergoes repeated relative movement with the tire. This process causes wear on the contact area between the retaining ring assembly and the tire. Once the wear reaches a certain level, the retaining ring assembly needs to be replaced. Therefore, the retaining ring assembly also includes the wear-resistant component 26, which replaces the other retaining ring components in contact with the tire. This way, only the wear-resistant component 26 wears when wear occurs, thus reducing wear on the retaining ring assembly 2. When the wear reaches its maximum, only the wear-resistant component 26 needs to be replaced, reducing the difficulty of replacement.

[0082] Example 2

[0083] This embodiment provides a seed tire forming machine, including the positive and negative wrapping device in Embodiment 1.

[0084] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0085] 1. By designing the positive envelope finger 31 to combine the rigid part 313 and the elastic part 314, the problem that pure rigid finger sheets cannot be used across size ranges in the prior art is solved, while pure elastic finger sheets cannot meet the process stiffness requirements.

[0086] 2. Since the elastic part 314 will undergo elastic deformation, if the connecting rod part 311 is connected to the connecting rod part 312, the position of the plate part 312 will be affected by the elastic deformation of the elastic part 314. Therefore, the connecting rod part 311 is connected to the rigid part 313 to increase the stability of the connection between the plate part 312 and the connecting rod part 311.

[0087] 3. As the diameter of the circle formed by the multiple finger-shaped pieces increases, the area of ​​the stacked portion of the elastic part 314 and the rigid part 313 gradually decreases. Since the thickness of the rigid part 313 gradually decreases in the direction away from the elastic part 314, the deformation of the elastic part 314 gradually decreases, thereby making the circle formed by the finger-shaped pieces closer to a true circle.

[0088] 4. By driving the radial movement of the retaining ring assembly 2 and the positive finger assembly 3 through the drive component 4, the diameter of the stop of the retaining ring assembly 2 and the diameter of the ring formed by the positive finger assembly 3 can be changed, thereby adapting to tires of different sizes. There is no need to stop the machine to replace the positive finger assembly 3 and the retaining ring assembly, which reduces the workload and the time spent on replacing parts, improves the overall production efficiency, and solves the problem of production time delay caused by frequent tooling changes in the existing technology.

[0089] 5. Since the range of variation between the stop diameter of the retaining ring assembly 2 and the diameter of the ring formed by the positive wrapping finger assembly 3 is related to the radial movement of the retaining ring assembly 2, and the radial movement of the retaining ring is a continuous movement, it can stop at any position within its movement range under the drive of the drive assembly 4. Therefore, this application can be adapted to a variety of tires of different sizes, not limited to one or two types, and has a wide range of applications.

[0090] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0091] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0092] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A positive and negative packaging device for use in a seed tire forming machine, characterized in that, The device includes multiple positive-wrapping finger components (3), each of which is arranged circumferentially along the positive-reverse wrapping device to form a ring, and the positive-wrapping finger components (3) are radially expandable and contractible to change the size of the ring. Each positive-wrapping finger component (3) includes: Mounting base (32); The finger-shaped piece is rotatably connected to the mounting base (32). The finger-shaped piece has a rigid part (313) and a deformable elastic part (314). The rigid part (313) and the elastic part (314) are arranged circumferentially along the front and back wrapping device. In the two finger-shaped pieces of two adjacent front wrapping finger assemblies (3), the elastic part (314) of one finger-shaped piece is superimposed on the rigid part (313) of the other finger-shaped piece. When the front and back wrapping device expands and contracts radially, the size of the overlapping area between the elastic part (314) and the rigid part (313) changes.

2. The forward and reverse packaging device according to claim 1, characterized in that, Along the circumference of the positive and negative packaging device, the thickness of the rigid part (313) gradually decreases in the direction away from the elastic part (314).

3. The forward and reverse packaging device according to claim 1, characterized in that, Along the radial direction of the positive and negative wrapping device, in the two finger pieces of two adjacent positive wrapping finger assemblies (3), the elastic part (314) of one finger piece is located inside the rigid part (313) of the other finger piece.

4. The forward and reverse packaging device according to claim 1, characterized in that, Both the rigid part (313) and the elastic part (314) are arc-shaped.

5. The reverse packaging device according to claim 1, characterized in that, The finger-shaped piece includes a connecting rod portion (311) and a plate-shaped portion (312). The connecting rod portion (311) is connected to the plate-shaped portion (312). The connecting rod portion (311) is rotatably connected to the mounting base (32). The plate-shaped portion (312) has the rigid portion (313) and the elastic portion (314).

6. The forward and reverse packaging device according to claim 5, characterized in that, The connecting rod portion (311) is connected to the rigid portion (313) of the plate portion (312).

7. The forward and reverse packaging device according to any one of claims 1 to 6, characterized in that, The positive envelope component (3) also includes: A push rod (33) is rotatably connected to the finger-shaped piece; The elastic element (34) abuts against the push rod (33) and provides the push rod (33) with an elastic force that drives the finger-shaped piece to expand and rotate radially.

8. The forward and reverse packaging device according to claim 7, characterized in that, The positive envelope component (3) also includes: The slide (35) abuts against the elastic member (34), the mounting base (32) has a groove extending along the axial direction of the positive and negative wrapping device, and the slide (35) is movably connected to the groove; Adjustment component (36) is movably connected to the mounting base (32) and abuts against the slide (35). When the adjustment component (36) moves, it drives the slide (35) to move along the slide groove to change the initial preload of the elastic element (34).

9. The forward and reverse packaging device according to any one of claims 1 to 6, characterized in that, The positive and negative packaging device also includes Circular fixing frame (1); Multiple buckle ring assemblies (2), each buckle ring assembly (2) is spaced apart along the circumferential direction of the fixing frame (1), the buckle ring assembly (2) is radially movable relative to the fixing frame (1), and the buckle ring assembly (2) has a buckle end for buckling; The positive-finger assembly (3) is connected to the inner side of the buckle ring assembly (2) and can move radially along the fixing frame (1) under the drive of the buckle ring assembly (2). The positive-finger assembly (3) is axially movable relative to the buckle ring assembly (2). The positive-finger assembly (3) includes finger-shaped pieces. The finger-shaped pieces have a contracted state that is radially retracted by the buckle ring end and an expanded state that avoids the buckle ring end and radially expands and rotates. When the positive-finger assembly (3) moves axially relative to the buckle ring assembly (2), the finger-shaped pieces switch between the contracted state and the expanded state. The driving component (4) is connected to the buckle ring component (2) and drives the buckle ring component (2) to move radially.

10. The forward and reverse packaging device according to claim 9, characterized in that, The buckle ring assembly (2) includes a frame (21), which is movably connected to the fixed frame (1) and the positive finger assembly (3). The frame (21) has a driving ramp (211), which forms an angle with the axial direction of the fixed frame (1). The driving assembly (4) includes a driving member, the output end of which is drivenly connected to the driving ramp (211), and there is a guide rail structure (22) between the output end and the driving ramp (211). The output end is movably arranged along the axial direction of the fixed frame (1) and drives the frame (21) to move radially through the driving ramp (211) when moving.

11. The reverse packaging device according to claim 10, characterized in that, The drive assembly (4) further includes a transmission component (41), which is driven to connect with the drive component and is located between the output end and the guide rail structure (22). The output end drives the frame (21) to move radially through the transmission component (41). The transmission component (41) is annular, and all the drive inclined surfaces (211) are driven to connect to different positions around the transmission component (41). When the transmission component (41) moves along the axial direction of the fixed frame (1), it drives the frame (21) of all the buckle ring assemblies (2) to move radially synchronously.

12. The reverse packaging device according to claim 10, characterized in that, A first guide structure (23) is provided between the frame (21) and the fixed frame (1), the first guide structure (23) extends radially along the fixed frame (1), and a second guide structure (24) is provided between the frame (21) and the positive finger assembly (3), the second guide structure (24) extends axially along the fixed frame (1).

13. The forward and reverse packaging device according to claim 10, characterized in that, The buckle ring assembly (2) also includes: The buckle ring stop is connected to the frame (21) and moves synchronously with the frame (21). The buckle ring stop has the buckle end, which has a recess for placing the support steel ring. Wear-resistant component (26) is disposed on the side of the buckle ring facing the finger piece and abuts against the finger piece.

14. A seed embryo forming machine, characterized in that, The device includes the positive and negative packaging device according to any one of claims 1 to 13.

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