Forward and reverse wrapping device and agricultural tire forming machine

Abstract

The utility model 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] The utility model relates to the field of tire processing, and more specifically, to a positive and negative wrapping device and an agricultural tire forming machine. Background Technique

[0002] A tire forming machine is a special equipment for laminating, rolling and forming a green tire embryo from film layers during the production of radial tires. The forming machine can be divided into a large-diameter laminating process and a small-diameter laminating process according to the cord laminating diameter. The large-diameter laminating process is generally used for two-stage forming machines. The process is that after laminating the cord fabric, the cord fabric hanging on the outside of the drum on both sides is gathered by positive wrapping fingers, so that the bead can pass through smoothly and be laminated on the side wall of the drum tile. Then the bladder expands and the carcass cord fabric is reversely wrapped under the driving force of the boosting ring.

[0003] The positive and negative wrapping device is mainly used for two-stage forming machines to realize the forming production of the carcass cylinder. Since tire factories produce a large number of tire specifications, it is necessary to frequently carry out production across different sizes. However, the current positive and negative wrapping devices usually need to be replaced for each size level and cannot achieve production across different size levels. But for large tire equipment such as agricultural tires and engineering tires, the tooling is huge and difficult to replace. Therefore, it is extremely urgent to minimize or eliminate tooling replacement.

[0004] By adding a driving component in the positive and negative wrapping device to drive the expansion and contraction of the bead ring component and the positive and negative wrapping component, during the process of positive wrapping of the tire, positive wrapping fingers are required. In the prior art, the positive wrapping fingers are divided into traditional rigid hard positive wrapping fingers made of thick-walled 40Cr or No. 45 steel, and semi-steel forming machine elastic positive wrapping fingers (soft) made of stainless steel sheets with a wall thickness of 0.8 mm.

[0005] However, the rigid hard positive wrapping fingers cannot be used across different size levels. If they do not expand / contract at the theoretical base circle diameter, they will be stuck due to interference between the finger pieces. The elastic positive wrapping fingers (stainless steel sheet type), because the wall thickness of this kind of positive wrapping finger is relatively thin, are only suitable for relatively thin and small overhang semi-steel carcass cylinder rubber materials. The agricultural tires are large in size and the cord fabric has a long overhang. It is difficult for the elastic sheet to complete the process actions and cannot meet the requirements of the positive and negative wrapping device for production across different size levels. Content of the Utility Model

[0006] The main purpose of the present utility model is to provide a positive and negative wrapping device and an agricultural tire forming machine to solve the problem that the positive wrapping fingers of the positive and negative wrapping device in the prior art cannot be used across different size levels.

[0007] To achieve the above object, according to one aspect of the present utility model, a front and back wrapping device for a farm tire forming machine is provided, which includes a plurality of front wrapping finger assemblies. Each front wrapping finger assembly is arranged circumferentially along the front and back wrapping device to form a ring, and the front wrapping finger assembly is radially expandable and contractible to change the size of the ring. The front wrapping finger assembly includes: a mounting seat and a finger-shaped piece. The finger-shaped piece is rotatably connected to the mounting seat. The finger-shaped piece has a rigid portion and an elastic portion that can be deformed. The rigid portion and the elastic portion are arranged circumferentially along the front and back wrapping device. Among the two finger-shaped pieces of adjacent two front wrapping finger assemblies, the elastic portion of one finger-shaped piece overlaps with the rigid portion of the other finger-shaped piece, and when the front and back wrapping device expands and contracts radially, the overlapping area between the elastic portion and the rigid portion changes.

[0008] Further, along the circumferential direction of the front and back wrapping device, the thickness of the rigid portion gradually decreases in the direction away from the elastic portion.

[0009] Further, along the radial direction of the front and back wrapping device, among the two finger-shaped pieces of adjacent two front wrapping finger assemblies, the elastic portion of one finger-shaped piece is located inside the rigid portion of the other finger-shaped piece.

[0010] Further, both the rigid portion and the elastic portion are arc-shaped.

[0011] Further, the finger-shaped piece includes a connecting rod portion and a sheet portion. The connecting rod portion is connected to the sheet portion. The connecting rod portion is rotatably connected to the mounting seat. The sheet portion has a rigid portion and an elastic portion.

[0012] Further, the connecting rod portion is connected to the rigid portion of the sheet portion.

[0013] Further, the front wrapping finger assembly further includes: a push rod, the push rod is rotatably connected to the finger-shaped piece; an elastic member, the elastic member abuts against the push rod and provides an elastic force for the push rod to drive the finger-shaped piece to expand and rotate radially.

[0014] Further, the front wrapping finger assembly further includes: a sliding seat, the sliding seat abuts against the elastic member. The mounting seat has a sliding groove extending along the axial direction of the front and back wrapping device. The sliding seat is movably connected to the sliding groove; an adjusting member, the adjusting member is movably connected to the mounting seat and abuts against the sliding seat. When the adjusting member acts, it drives the sliding seat to move along the sliding groove to change the initial pre-tightening force of the elastic member.

[0015] Further, the front and back wrapping device further includes an annular fixing frame; a plurality of buckle ring assemblies, each buckle ring assembly is arranged at intervals along the circumferential direction of the fixing frame, the buckle ring assembly is radially movably arranged relative to the fixing frame, and the buckle ring assembly has a buckle end for buckling the ring; the front wrapping finger assembly is connected to the inner side of the buckle ring assembly and can move radially along the fixing frame driven by the buckle ring assembly, the front wrapping finger assembly is axially movably arranged relative to the buckle ring assembly, the front wrapping finger assembly includes finger-shaped pieces, the finger-shaped pieces have a contracted state in which they are radially retracted limited by the buckle end and an expanded state in which they are radially expanded and rotated to avoid the buckle end, when the front wrapping finger assembly moves axially relative to the buckle ring assembly, the finger-shaped pieces are switched between the contracted state and the expanded state; a driving assembly, the driving assembly is drivingly connected to the buckle ring assembly and drives the buckle ring assembly to move radially.

[0016] Further, the buckle ring assembly includes a frame body, the frame body is movably connected to the fixing frame and the front wrapping finger assembly, the frame body has a driving inclined surface, the driving inclined surface forms an angle with the axis of the fixing frame, the driving assembly includes a driving member, the output end of the driving member is drivingly connected to the driving inclined surface, and there is a guide rail structure between the output end and the driving inclined surface, the output end is axially movably arranged along the fixing frame and drives the frame body to move radially through the driving inclined surface when moving.

[0017] Further, the driving assembly further includes a transmission member, the transmission member is drivingly connected to the driving member and is located between the output end and the guide rail structure, the output end drives the frame body to move radially through the transmission member, the transmission member is annular, and all the driving inclined surfaces are respectively drivingly connected to different positions in the circumferential direction of the transmission member, when the transmission member moves axially along the fixing frame, it drives the frame bodies of all the buckle ring assemblies to move radially synchronously.

[0018] Further, a first guiding structure is arranged between the frame body and the fixing frame, the first guiding structure extends radially along the fixing frame, and a second guiding structure is arranged between the frame body and the front wrapping finger assembly, the second guiding structure extends axially along the fixing frame.

[0019] Further, the buckle ring assembly further includes: a buckle ring rabbet, the buckle ring rabbet is connected to the frame body and moves synchronously with the frame body, the buckle ring rabbet has a buckle end, and the buckle end has a concave portion for placing and supporting the steel ring; a wear-resistant member, the wear-resistant member is arranged on the side of the buckle ring rabbet facing the finger-shaped piece and abuts against the finger-shaped piece.

[0020] According to another aspect of the present invention, a tire building machine is provided, which includes the above-mentioned front and back wrapping device.

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

[0022] 1. By designing the positive wrapping finger to be a combination of a rigid part and an elastic part, the problems in the prior art that a purely rigid finger-shaped piece cannot be used across different sizes and a purely elastic finger-shaped piece cannot meet the process stiffness requirements are solved.

[0023] 2. Since the elastic part will undergo elastic deformation, if the connecting rod parts are connected to each other, the position of the sheet 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 sheet part and the connecting rod part.

[0024] 3. As the diameter of the circle formed by surrounding with multiple finger-shaped pieces becomes larger and larger, the area of the stacked part of the elastic part and the rigid part will gradually decrease. Since the thickness of the rigid part gradually decreases in the direction away from the elastic part, this will cause the deformation amount of the elastic part to gradually decrease, so that the circle formed by the finger-shaped pieces is closer to a true circle.

[0025] 4. By driving the driving component to drive the radial movement of the snap ring component and the positive wrapping finger component, the stop diameter of the snap ring component and the diameter of the ring formed by the positive wrapping finger component can be changed, so as to adapt to tires of different sizes. There is no need to stop the machine to replace the positive wrapping finger component and the snap ring component, etc., reducing the workload and the time spent on replacing parts, improving the overall production efficiency, and solving the problem of delaying production time due to frequent replacement of tooling in the prior art.

[0026] 5. Since the change range of the diameter of the ring formed by the stop diameter of the snap ring component and the positive wrapping finger component is related to the radial movement of the snap ring component, and the radial movement of the snap ring is a continuous movement and can stop at any position within its movement range driven by the driving component, the present application can adapt to a variety of tires of different sizes, not limited to one or two, and has a wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specification drawings forming a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0028] Figure 1 is the overall structural schematic diagram of the positive and negative wrapping device provided by the present application;

[0029] Figure 2 is the front view of the positive and negative wrapping device provided by the present application;

[0030] Figure 3 is the cross-sectional view of the positive and negative wrapping device with the largest specification and the positive wrapping finger retracted provided by the present application;

[0031] Figure 4 is the cross-sectional view of the positive and negative wrapping device with the smallest specification and the positive wrapping finger retracted provided by the present application;

[0032] Figure 5 Schematic structural diagram of the buckle ring assembly of the front and back wrapping device

[0033] Figure 6 Cross-sectional view of the smallest specification of the front and back wrapping device provided by the present application when the front wrapping finger is opened

[0034] Figure 7 Schematic structural diagram of the front wrapping finger assembly of the front and back wrapping device

[0035] Figure 8 Axonometric view of the structure of the front wrapping finger described in the embodiment of the present utility model

[0036] Figure 9 Front view of the large specification state of the front wrapping finger described in the embodiment of the present utility model

[0037] Figure 10 It is Figure 9 Enlarged view of part A of

[0038] Figure 11 Front view of the small specification state of the front wrapping finger described in the embodiment of the present utility model

[0039] Figure 12 It is Figure 11 Enlarged view of part B of

[0040] Among them, the above-mentioned drawings include the following reference numerals:

[0041] 1. Fixed frame; 2. Buckle ring assembly; 21. Frame body; 211. Driving inclined surface; 22. Guide rail structure; 23. First guiding structure; 24. Second guiding structure; 25. Buckle stop; 26. Wear-resistant part; 3. Front wrapping finger assembly; 31. Front wrapping finger; 311. Link part; 312. Flaky part; 313. Rigid part; 314. Elastic part; 32. Mounting seat; 33. Push rod; 34. Elastic part; 35. Slide seat; 36. Adjusting part; 4. Driving assembly; 41. Transmission part Detailed implementation manners

[0042] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments

[0043] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs

[0044] In the present utility model, unless otherwise specified, the orientation terms such as "upper, lower, top, bottom" generally refer to the directions shown in the drawings, or refer to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms do not limit the present utility model.

[0045] To solve the problem that in the prior art, rigid finger pieces cannot be used across different sizes, while flexible finger pieces cannot meet the process stiffness requirements, the present application provides a positive and negative wrapping device and a radial tire building machine, which overcome the problems in the prior art by setting the positive wrapping fingers in a form with both elastic parts and rigid parts.

[0046] Embodiment 1

[0047] A positive and negative wrapping device, see Figures 1 to 12 , including a plurality of positive wrapping finger assemblies 3. Each positive wrapping finger assembly 3 is arranged circumferentially along the positive and negative wrapping device to form a ring, and the positive wrapping finger assembly 3 is radially expandable and contractible to change the size of the ring. The positive wrapping finger 31 includes a mounting seat 32 and a finger piece. The finger piece is rotatably connected to the mounting seat 32. The finger 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 positive and negative wrapping device. Among the two finger pieces of two adjacent positive wrapping finger assemblies 3, the elastic part 314 of one finger piece overlaps with the rigid part 313 of the other finger piece, and when the positive and negative wrapping device expands and contracts radially, the overlapping area between the elastic part 314 and the rigid part 313 changes.

[0048] Since the positive wrapping finger assembly 3 expands and contracts radially, it can adapt to tires of different sizes. When the size of the tire to be positively and negatively wrapped changes, the positive wrapping finger assembly 3 for positively and negatively wrapping the tire also needs to make corresponding adaptations, especially the positive wrapping finger 31 which is the main part. By changing 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 to adapt to tires of different sizes.

[0049] When positively wrapping a tire with a smaller size, the overlapping area between the elastic part 314 and the rigid part 313 is large. At this time, the elastic part 314 of the positive wrapping finger 31 overlaps with the inner side of the rigid part 313 of the adjacent positive wrapping finger 31. In this way, the circumferential diameter formed by the multiple elastic parts 314 and rigid parts 313 is smaller.

[0050] When performing positive wrapping on tires with a relatively large size level, the overlapping area of the elastic part 314 and the rigid part 313 of two adjacent positive wrapping fingers 31 changes. The overlapping area of the elastic part 314 and the rigid part 313 is relatively small, resulting in a relatively small deformation amount of the elastic part 314. In this way, the circumferential diameter formed by multiple elastic parts 314 and rigid parts 313 is relatively large.

[0051] By designing the positive wrapping finger 31 to be used in combination with the rigid part 313 and the elastic part 314, the problem in the prior art that a purely rigid finger piece cannot be used across different size levels, while a purely elastic finger piece cannot meet the process stiffness requirements is solved.

[0052] Furthermore, along the circumferential direction 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, among 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.

[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 close to the axis of the positive and negative wrapping device. At this time, the rigid part 313 will impose a certain limit on the elastic part 314. The area of the stacked part of the elastic part 314 and the rigid part 313 is inversely proportional to the size level of the tire to be processed, that is, the larger the size level of the tire to be processed, the smaller the area of the stacked part of the elastic part 314 and the rigid part 313; the circle formed by multiple finger pieces is positively correlated with the size level of the tire.

[0055] As the diameter of the circle formed by multiple finger pieces increases, the area of the stacked part of the elastic part 314 and the rigid part 313 will gradually decrease. Since the thickness of the rigid part 313 gradually decreases in the direction away from the elastic part 314, this will cause the deformation amount of the elastic part 314 to gradually decrease, thereby making the circle formed by the finger 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 pieces surround each other, since both the rigid part 313 and the elastic part 314 are arc-shaped, the shape formed by the surrounding will be closer to a true circle.

[0058] In this application, the finger piece includes a connecting rod part 311 and a sheet part 312. The connecting rod part 311 is connected to the sheet part 312. The connecting rod part 311 is rotatably connected to the mounting seat 32. The sheet part 312 has a rigid part 313 and an elastic part 314.

[0059] During the process of turning up the bead of the entire tire inside out, in order to reduce interference with other components, the finger piece needs to be located away from the main shaft of the bead turning device when not in operation. Therefore, the finger piece needs to be rotatably connected to the mounting seat 32 to meet this requirement. To facilitate the rotation of the finger piece, the finger piece is configured as a sheet portion 312 and a connecting rod portion 311. The sheet portion 312 is used for the process of turning up the bead inside out, and the connecting rod portion 311 is used to serve the rotation of the entire finger piece. By configuring the finger piece as the sheet portion 312 and the connecting rod portion 311, it is convenient for the finger piece to rotate with respect to the mounting seat 32.

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

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

[0062] In the present application, the bead turning finger assembly 3 further includes a push rod 33 and an elastic member 34. The push rod 33 is rotatably connected to the finger piece, and the elastic member 34 abuts against the push rod 33 and provides an elastic force for the push rod 33 to drive the finger piece to expand and rotate radially.

[0063] When the bead turning finger assembly 3 performs the bead turning operation on the tire, the end of the finger piece away from the mounting seat 32 will rotate towards the direction close to the axis of the bead turning device. At this time, the finger piece compresses the elastic member 34. Before the next bead turning operation, the bead turning finger assembly 3 moves axially relative to the bead retaining ring assembly 2, causing the bead retaining ring assembly 2 to disengage from the finger piece. The finger piece flips and unfolds under the action of the elastic member 34, so that when the bead retaining ring assembly 2 moves axially subsequently, it can extrude the finger piece from the outside to achieve the bead turning action.

[0064] Furthermore, the bead turning finger assembly 3 further includes a sliding seat 35 and an adjusting member 36. The sliding seat 35 abuts against the elastic member 34. The mounting seat 32 has a sliding groove extending axially along the fixed frame 1. The sliding seat 35 is movably connected to the sliding groove. The adjusting member 36 is movably connected to the mounting seat 32 and abuts against the sliding seat 35. When the adjusting member 36 operates, it drives the sliding seat 35 to move along the sliding groove to change the initial pre-tightening force of the elastic member 34.

[0065] When the positive wrapping of tires of different sizes is required, the diameter of the circle formed by the positive wrapping finger assembly 3 needs to be adjusted accordingly to match the size of the tire. Similarly, for tires of different sizes, the angle at which the end of the finger piece away from the mounting base 32 rotates towards the axis of the positive and negative wrapping device is different, which in turn leads to different degrees of compression of the elastic member 34 and affects the service performance of the elastic member 34. By adjusting the position of the sliding seat 35 through the adjusting member 36, the compression degree of the elastic member 34 can be adjusted to facilitate the adaptation to tires of different sizes.

[0066] In this application, the positive and negative wrapping device further includes an annular fixing frame 1, a plurality of bead ring assemblies 2, and a driving assembly 4. Each bead ring assembly 2 is arranged at intervals along the circumferential direction of the fixing frame 1. The bead ring assembly 2 is radially movable relative to the fixing frame 1, and the bead ring assembly 2 has a bead end for bead locking; the positive wrapping finger assembly 3 is connected to the inner side of the bead ring assembly 2 and can move radially along the fixing frame 1 under the drive of the bead ring assembly 2. The positive wrapping finger assembly 3 is axially movable relative to the bead ring assembly 2. The positive wrapping finger assembly 3 includes a finger piece, which has a contracted state in which it is radially retracted by the bead end limit and an expanded state in which it radially expands and rotates to avoid the bead end. When the positive wrapping finger assembly 3 moves axially relative to the bead ring assembly 2, the finger piece switches between the contracted state and the expanded state; the driving assembly 4 is drivingly connected to the bead ring assembly 2 and drives the bead ring assembly 2 to move radially.

[0067] In the two - stage positive and negative wrapping process for large - diameter bias ply, after the ply is laminated, the positive wrapping finger assembly 3 is pushed out and opened, then the bead ring assembly 2 moves towards the drum to gather and contract the positive wrapping finger 31, and finally the bead is buckled on the drum side. There is a certain correlation between the stop diameter of the bead ring assembly 2 and the diameter of the circle formed by the positive wrapping finger assembly 3. Therefore, when the tire formula is changed and the bead diameter changes, the stop diameter of the bead ring assembly 2 and the diameter of the positive wrapping finger assembly 3 both need to expand or contract to the position of the formula parameters. To achieve automatic size change, the positive wrapping finger assembly 3 and the bead ring assembly 2 are made into a structure that can expand or contract together. Driven by the driving assembly 4, the positive wrapping finger assembly 3 and the bead ring assembly 2 can contract or expand together to adapt to tires of different sizes. Then, the power member drives the positive wrapping finger assembly 3 and the bead ring assembly 2 to move axially to perform the positive and negative wrapping of the tire.

[0068] When the size level of the tire that needs to be wrapped inside out changes, it is necessary to adjust the diameter of the rabbet of the rabbet ring assembly 2 and the diameter of the ring formed by the inside-out wrapping finger assembly 3 so that they are adapted to the tire after the size level change. At this time, it is necessary to drive the driving assembly 4 to work, drive the rabbet ring assembly 2 to move along the radial direction of the fixed frame 1, change the diameter of the rabbet of the rabbet ring assembly 2, and match the specifications of the tire to be wrapped inside out. Since the inside-out wrapping finger assembly 3 is connected to the inner side of the rabbet ring assembly 2, when the diameter of the rabbet of the rabbet ring assembly 2 changes, the inside-out wrapping finger assembly 3 will change accordingly and match the specifications of the tire to be wrapped inside out.

[0069] By driving the driving assembly 4 to drive the radial movement of the rabbet ring assembly 2 and the inside-out wrapping finger assembly 3, it is possible to change the diameter of the rabbet of the rabbet ring assembly 2 and the diameter of the ring formed by the inside-out wrapping finger assembly 3, so as to adapt to tires of different size levels. There is no need to stop the machine to replace the inside-out wrapping finger assembly 3 and the rabbet ring assembly, etc., reducing the workload, and reducing the time spent on replacing parts, improving the overall production efficiency, and solving the problem of delaying production time due to frequent replacement of tooling in the prior art.

[0070] Since the range of change in the diameter of the rabbet of the rabbet ring assembly 2 and the diameter of the ring formed by the inside-out wrapping finger assembly 3 is related to the radial movement of the rabbet ring assembly 2, and the radial movement of the rabbet ring is a continuous movement, and it can stop at any position within its movement range driven by the driving assembly 4, so the present application can adapt to a variety of different size levels of tires, not limited to one or two, and has a wide application range.

[0071] Further, the rabbet ring assembly 2 includes a frame body 21. The frame body 21 is movably connected to the fixed frame 1 and the inside-out wrapping finger assembly 3. The frame body 21 has a driving inclined surface 211. The driving inclined surface 211 forms an angle with the axial direction of the fixed frame 1. The driving assembly 4 includes a driving member. The output end of the driving member is drivingly connected to the driving inclined surface 211, and there is a guide rail structure 22 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 body 21 to move radially when moving through the driving inclined surface 211.

[0072] By driving the driving assembly 4 to drive the frame body 21 to move along the axial direction of the fixed frame 1, since the frame body 21 has a driving inclined surface 211 and the inclined surface forms an angle with the axial direction of the fixed frame 1, through the rotational action of the inclined surface, part of the movement of the frame body 21 along the axial direction of the fixed frame 1 will be converted into the movement of the fixed frame 1 in the radial direction, realizing the movement of the fixed frame 1 in the radial direction of the fixed frame 1.

[0073] After the driving component 4 works, it will drive the output end of the driving component 4 to displace relative to the frame 21. Since the frame 21 is provided with a driving inclined surface 211 and the output end of the driving component 4 is engaged with the driving inclined surface 211, when the frame 21 moves, the output end of the driving component 4 will displace relative to the driving inclined surface 211. By providing a guide rail between the output end of the driving member and the driving inclined surface 211, the relative displacement between the output end of the driving member and the driving inclined surface 211 can be limited, preventing misalignment in the circumferential direction of the fixing bracket 1 between the two, and increasing the stability of the relative displacement between the two.

[0074] Further, the driving component 4 further includes a transmission member 41. The transmission member 41 is drivingly connected to the driving member 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 member 41. The transmission member 41 is annular, and all the driving inclined surfaces 211 are respectively drivingly connected to different positions in the circumferential direction of the transmission member 41. When the transmission member 41 moves along the axial direction of the fixing bracket 1, it drives all the frames 21 of the snap ring assemblies to move radially synchronously.

[0075] The transmission member 41 plays a role in transmission, transmitting the transmission of the driving member to the frame 21. By driving the transmission member 41 to move, the frame 21 can be driven to move. Since all the driving inclined surfaces 211 of the frames 21 are drivingly connected to the transmission member 41, when the transmission member 41 moves, it can drive all the frames 21 to move together. This can increase the synchronism of the movement of the frames 21 at different positions of the fixing bracket 1, so that after the stop diameter of the snap ring assembly 2 changes, the stop of the snap ring can remain a complete circle. It can avoid affecting the subsequent processing effect of the tire inside-out wrapping due to the asynchronous movement of individual snap ring assemblies 2.

[0076] Further, a first guiding structure 23 is provided between the frame 21 and the fixing bracket 1. The first guiding structure 23 extends along the radial direction of the fixing bracket 1. A second guiding structure 24 is provided between the frame 21 and the inside-out wrapping finger assembly 3. The second guiding structure 24 extends along the axial direction of the fixing bracket 1.

[0077] The first guiding structure 23 can limit the movement of the frame 21, preventing the frame 21 from displacing in the circumferential direction of the fixing bracket 1, and increasing the stability of the contraction or expansion of the snap ring assembly 2.

[0078] The second guiding structure 24 can limit the movement of the inside-out wrapping finger 31, so that the inside-out wrapping finger assembly 3 can only move along the axial direction of the fixing bracket 1, increasing the stability of the movement of the inside-out wrapping finger assembly 3.

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

[0080] The recess provided on the bead end facilitates the cooperation between the bead stop 25 and the steel ring, thereby realizing the bead buckling and the inside-out and outside-in processes of the tire.

[0081] The wear-resistant member 26 plays a protective role. During the operation of the bead ring assembly 2, there is a need for repeated relative movement between the bead ring assembly 2 and the tire. In this process, the contact part between the bead ring assembly and the tire will be worn. After the wear reaches a certain degree, the bead ring assembly needs to be replaced. Therefore, the bead ring assembly further includes the wear-resistant member 26. The wear-resistant member 26 is used to contact the tire instead of the rest of the bead ring assembly. In this way, only the wear-resistant member 26 is worn when there is wear, thereby reducing the wear of the bead ring assembly 2. When the wear reaches the maximum degree, only the wear-resistant member 26 needs to be replaced, reducing the replacement difficulty.

[0082] Embodiment 2

[0083] This embodiment provides a radial tire building machine, including the inside-out and outside-in device in Embodiment 1.

[0084] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0085] 1. By designing the positive wrap finger 31 as a combination of a rigid portion 313 and an elastic portion 314, the problem in the prior art that a purely rigid finger-shaped piece cannot be used across size levels, while a purely elastic finger-shaped piece cannot meet the process stiffness requirements is solved.

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

[0087] 3. As the diameter of the circle formed by surrounding with multiple finger-shaped pieces becomes larger and larger, the area of the stacked portion of the elastic portion 314 and the rigid portion 313 will gradually decrease. Since the thickness of the rigid portion 313 gradually decreases in the direction away from the elastic portion 314, this will cause the deformation amount of the elastic portion 314 to gradually decrease, so that the circle formed by the finger-shaped pieces is closer to a true circle.

[0088] 4. By driving the radial movement of the snap ring assembly 2 and the front wrapping finger assembly 3 through the driving component 4, the stop diameter of the snap ring assembly 2 and the diameter of the ring formed by the front wrapping finger assembly 3 can be changed, so as to adapt to tires of different sizes. It is not necessary to stop the machine to replace the front wrapping finger assembly 3 and the snap ring assembly, etc., which reduces the workload, and also reduces the time spent on replacing parts, improves the overall production efficiency, and solves the problem of delaying production time due to frequent replacement of tooling in the prior art.

[0089] 5. Since the change range of the stop diameter of the snap ring assembly 2 and the diameter of the ring formed by the front wrapping finger assembly 3 is related to the radial movement of the snap ring assembly 2, and the radial movement of the snap ring is a continuous movement and can stop at any position within its movement range driven by the driving component 4, the present application can adapt to a variety of tires of different sizes, not limited to one or two, and has a wide application range.

[0090] Obviously, the described embodiments above are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0091] It should be noted that the terms used here are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form also intends to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0092] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here.

[0093] The above are only the preferred embodiments of the present utility model, and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A reverse wrapping device for a agricultural tire building machine, characterized in that, It includes a plurality of positive wrapping finger components (3). Each of the positive wrapping finger components (3) is arranged circumferentially along the circumference of the positive and negative wrapping device to form a ring, and the positive wrapping finger component (3) is radially expandable and contractible to change the size of the ring. The positive wrapping finger component (3) includes: A mounting seat (32); A finger-shaped piece. The finger-shaped piece is rotatably connected to the mounting seat (32). The finger-shaped piece has a rigid portion (313) and a deformable elastic portion (314). The rigid portion (313) and the elastic portion (314) are arranged circumferentially along the circumference of the positive and negative wrapping device. Among the two finger-shaped pieces of two adjacent positive wrapping finger components (3), the elastic portion (314) of one finger-shaped piece overlaps with the rigid portion (313) of the other finger-shaped piece. And when the positive and negative wrapping device expands and contracts radially, the overlapping area between the elastic portion (314) and the rigid portion (313) changes.

2. The inside-outside wrapping device according to claim 1, wherein Along the circumference of the positive and negative wrapping device, the thickness of the rigid portion (313) gradually decreases in the direction away from the elastic portion (314).

3. The front and back wrapping device according to claim 1, characterized in that, Along the radial direction of the positive and negative wrapping device, among the two finger-shaped pieces of two adjacent positive wrapping finger components (3), the elastic portion (314) of one finger-shaped piece is located inside the rigid portion (313) of the other finger-shaped piece.

4. The inside-outside wrapping device according to claim 1, characterized in that, Both the rigid portion (313) and the elastic portion (314) are arc-shaped.

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

6. The front and back wrapping device according to claim 5, characterized in that, The connecting rod portion (311) is connected to the rigid portion (313) of the sheet portion (312).

7. The front and back wrapping device according to any one of claims 1 to 6, characterized in that, The positive wrapping finger component (3) further includes: A push rod (33). The push rod (33) is rotatably connected to the finger-shaped piece; An elastic member (34). The elastic member (34) abuts against the push rod (33) and provides an elastic force for the push rod (33) to drive the finger-shaped piece to expand and rotate radially.

8. The anti-wrap and wrap device according to claim 7, characterized in that, The positive wrapping finger component (3) further includes: A sliding seat (35). The sliding seat (35) abuts against the elastic member (34). The mounting seat (32) has a chute extending along the axial direction of the positive and negative wrapping device. The sliding seat (35) is movably connected to the chute; An adjusting member (36). The adjusting member (36) is movably connected to the mounting seat (32) and abuts against the sliding seat (35). When the adjusting member (36) acts, it drives the sliding seat (35) to move along the chute to change the initial pre-tightening force of the elastic member (34).

9. The front and back wrapping device according to any one of claims 1 to 6, characterized in that, The positive and negative wrapping device further includes An annular fixing frame (1); A plurality of buckle ring components (2). Each of the buckle ring components (2) is arranged at intervals along the circumferential direction of the fixing frame (1). The buckle ring component (2) is radially movable relative to the fixing frame (1). The buckle ring component (2) has a buckle end for buckling. The positive wrapping finger assembly (3) is connected to the inner side of the snap ring assembly (2) and can move radially along the fixed frame (1) driven by the snap ring assembly (2). The positive wrapping finger assembly (3) is axially movable relative to the snap ring assembly (2). The positive wrapping finger assembly (3) includes finger-shaped pieces. The finger-shaped pieces have a contracted state in which they are radially retracted by the snap ends and an expanded state in which they radially expand and rotate to avoid the snap ends. When the positive wrapping finger assembly (3) axially moves relative to the snap ring assembly (2), the finger-shaped pieces switch between the contracted state and the expanded state. A driving assembly (4), the driving assembly (4) is drivingly connected to the snap ring assembly (2) and drives the snap ring assembly (2) to move radially.

10. The positive and negative wrapping device according to claim 9, characterized in that, The snap ring assembly (2) includes a frame body (21). The frame body (21) is movably connected to the fixed frame (1) and the positive wrapping finger assembly (3). The frame body (21) has a driving inclined surface (211). The driving inclined surface (211) forms an angle with the axis of the fixed frame (1). The driving assembly (4) includes a driving member. The output end of the driving member is drivingly connected to the driving inclined surface (211), and there is a guide rail structure (22) between the output end and the driving inclined surface (211). The output end is axially movable along the fixed frame (1) and drives the frame body (21) to move radially through the driving inclined surface (211) when moving.

11. The inside-outside wrapping device according to claim 10, characterized in that, The driving assembly (4) further includes a transmission member (41). The transmission member (41) is drivingly connected to the driving member and is located between the output end and the guide rail structure (22). The output end drives the frame body (21) to move radially through the transmission member (41). The transmission member (41) is annular, and all the driving inclined surfaces (211) are respectively drivingly connected to different positions in the circumferential direction of the transmission member (41). When the transmission member (41) moves axially along the fixed frame (1), it drives the frame bodies (21) of all the snap ring assemblies (2) to move radially synchronously.

12. The inside-outside wrapping device according to claim 10, characterized in that, A first guiding structure (23) is provided between the frame body (21) and the fixed frame (1). The first guiding structure (23) extends radially along the fixed frame (1). A second guiding structure (24) is provided between the frame body (21) and the positive wrapping finger assembly (3). The second guiding structure (24) extends axially along the fixed frame (1).

13. The inside-outside wrapping device according to claim 10, characterized in that, The snap ring assembly (2) further includes: A snap ring stop. The snap ring stop is connected to the frame body (21) and moves synchronously with the frame body (21). The snap ring stop has the snap end, and the snap end has a recess for placing and supporting the steel ring. A wear-resistant member (26). The wear-resistant member (26) is arranged on the side of the snap ring stop facing the finger-shaped pieces and abuts against the finger-shaped pieces.

14. An agricultural tire forming machine, characterized in that, Including the positive and negative wrapping device according to any one of claims 1 to 13.

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