Method and device for adjusting specifications of building drum

Abstract

The present application provides a method and a device for adjusting specifications of a forming drum. The device for adjusting specifications of a forming drum comprises a driving assembly, a transmission assembly and a diameter-variable member which are sequentially connected, wherein the driving assembly comprises a driving member and an output member. The method for adjusting specifications of a forming drum comprises: driving, by means of a driving member, according to the size of a tire to be processed, an output member to move axially to a retracted position or an intermediate position, and enabling a diameter-variable member to be located at the minimum diameter position or the intermediate diameter position; after a material is attached or a steel ring is mounted, driving, by means of the driving member, the output member to move to an expanded position, and changing the diameter-variable member to be located at the maximum diameter position; after the processing is completed, driving, by means of the driving member, the output member to move to the retracted position, reducing the diameter of the diameter-variable member, and removing the processed tire. The present application addresses the problem of time-consuming and labor-consuming size replacement of a mechanical forming drum in the prior art.

Description

Method and device for adjusting specifications of forming drum

[0001] This application claims priority to the patent application submitted to the State Intellectual Property Office of China on December 31, 2020, with application number 202011638995.6, and invention name "Method and device for adjusting the specifications of forming drums". Technical Field

[0002] The present application relates to the technical field of tire processing, and in particular to a method and device for adjusting the specifications of a building drum. Background Art

[0003] Currently, tire building drums are divided into capsule drums and mechanical drums. The main difference between these two drums is the way they are turned up. Capsule drums use a turn-up capsule for inflation, while mechanical drums use a turn-up rod. Mechanical drums offer far greater tire building efficiency than capsule drums, which is why they hold a significant market share on semi-steel building machines. However, mechanical drums are complex, and changing tire sizes necessitates replacing the side drum. Most general-sized tire plants produce to order, requiring frequent side drum replacements. Each replacement typically takes approximately 20-30 minutes, representing a significant cost to the tire plant.

[0004] Summary of the Invention

[0005] The main purpose of the present application is to provide a method and device for adjusting the specifications of a building drum, so as to solve the problem in the prior art that it is time-consuming and labor-intensive to change the size of a mechanical building drum.

[0006] In order to achieve the above-mentioned purpose, according to an optional embodiment of the present application, a method for adjusting the specifications of a building drum is provided. The building drum specification adjustment device includes a drive assembly, a transmission assembly and a reducer connected in sequence. The drive assembly includes a drive member and an output member. The method for adjusting the specifications of the building drum includes: according to the size of the tire to be processed, the output member is driven by the drive member to axially move to a contracted position or an intermediate position, and the reducer is located at the minimum diameter or the intermediate diameter; after pasting the material or installing the steel ring, the output member is driven by the drive member to move to the expanded position, and the reducer is changed to the maximum diameter; after processing is completed, the output member is driven by the drive member to move to the contracted position, and the diameter of the reducer is reduced to remove the processed tire.

[0007] In an optional embodiment, the driving member is a cylinder and the output member is a piston. When the piston moves to the end of the cylinder, it is located in a contracted position or an expanded position. When the piston is located between the two ends of the cylinder, it is located in an intermediate position. There is at least one intermediate position, and the position of the piston is controlled by controlling the travel distance of the piston in the cylinder.

[0008] In an optional embodiment, the cylinder can form multiple air chambers of different sizes, and by applying pressure to the air chambers of different sizes, the piston can be driven to move different distances, so that the piston moves between a contracted position, an intermediate position, and an expanded position.

[0009] In an optional embodiment, the drive assembly also includes an elastic member. When the elastic member is in a natural state, the piston is located in a middle position. By applying pressure to the cylinder, the piston moves to a contracted position or an expanded position. By not applying pressure to the cylinder, the piston is located in a middle position.

[0010] In an optional embodiment, the driving member is a motor, and the output member is a lead screw and a nut. The lead screw is driven by the motor to rotate, and the lead screw drives the nut to move between a contracted position, at least one intermediate position and an expanded position.

[0011] In an optional embodiment, when adjusting the diameter of the reducing member, a step-by-step adjustment or a stepless adjustment is adopted for adjustment.

[0012] According to an optional embodiment of the present application, a forming drum specification adjustment device is provided, comprising: a driving assembly, the driving assembly comprising a driving member and an output member that are drive-connected, and the output member can adjust the driving distance along the axial direction of the driving member, and has a contracted position and an expanded position that can move to the limit, and at least one intermediate position between the contracted position and the expanded position; a transmission assembly, the transmission assembly is drive-connected to the output member; a reducing member, the reducing member is connected to the transmission assembly, the output member drives the transmission assembly to move to drive the reducing member to change the diameter size, and when the output member is in the contracted position, the intermediate position and the expanded position, the reducing member respectively forms a minimum diameter, an intermediate diameter and a maximum diameter with increasing diameters.

[0013] In an optional embodiment, the driving member is a cylinder, the output member is a piston, the piston is located in a contracted position or an expanded position when it moves to the end of the cylinder, and is located in an intermediate position when it is located between the two ends of the cylinder.

[0014] In an optional embodiment, the cylinder can form multiple air chambers of different sizes, and when pressure is applied to the air chambers of different sizes, the piston can move different distances to move between a contracted position, an intermediate position, and an expanded position.

[0015] In an optional embodiment, the drive assembly also includes an elastic member abutting the output member. When the elastic member is in a natural state, the piston is located in a middle position. When pressure is applied to the cylinder, the piston can move to a contracted position or an expanded position. When no pressure is applied to the cylinder, the piston is located in the middle position under the action of the elastic member.

[0016] In an optional embodiment, the driving member is a motor, the output member is a lead screw and a nut, the nut is connected to the transmission assembly, and when the motor drives the lead screw to rotate, the lead screw drives the nut to move between a contracted position, an intermediate position, and an expanded position.

[0017] In an optional embodiment, the forming drum specification adjustment device is a backing plate assembly, a locking block assembly or a middle drum assembly.

[0018] The technical solution of the present application is to realize radial expansion and contraction of the building drum specification adjustment device by arranging a drive assembly, a transmission assembly and a diameter reducing member, so that the building drum specification adjustment device can form a cylindrical outer surface in the radial position as needed to fit the materials of the various half components of the tire. When in use, the output member is first driven axially by the drive member to move the output member to a contracted position or an intermediate position. The output member drives the diameter reducing member through the transmission assembly to move the diameter reducing member so that the diameter of the diameter reducing member is adjusted to a smaller minimum diameter or an intermediate diameter, so that operations such as tire attachment can be performed. After completion, the output member is driven again to move to the expanded position to expand the diameter of the diameter reducing member so that subsequent operations such as fixing the steel rim and inflating the tire can be performed. After processing is completed, the diameter of the diameter reducing member is reduced to remove the tire. The above-mentioned setting method enables the building drum specification adjustment device to process tires of multiple sizes during tire production without replacing the side drum. Only the diameter needs to be adjusted, thereby simply and quickly realizing the processing of tires of multiple sizes, not only saving time and effort, but also improving processing efficiency and avoiding various losses caused by replacing the side drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0020] FIG1 shows a flow chart of a method for adjusting the specifications of a building drum according to the present application;

[0021] FIG2 is a schematic structural diagram showing the application of the building drum specification adjustment device in a tire production device;

[0022] FIG3 shows an enlarged view of point P in FIG2 .

[0023] The above drawings include the following reference numerals:

[0024] 10. Main shaft; 20. Turn-up rod assembly; 21. Roller; 30. Pad assembly; 31. Expansion drive member; 32. Pad block; 33. Advance and retreat drive member; 40. Lock block assembly; 41. Drive assembly; 411. Drive member; 412. Output member; 413. Elastic member; 42. Transmission assembly; 43. Reducer; 50. Middle drum assembly. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to solve the problem in the prior art that it is time-consuming and labor-intensive to change the size of a mechanical building drum, the present application provides a method and device for adjusting the specifications of a building drum.

[0027] A method for adjusting the specifications of a building drum is shown in Figure 1. As shown in Figures 2 and 3, the building drum specification adjustment device includes a drive assembly 41, a transmission assembly 42 and a reducer 43 connected in sequence, and the drive assembly 41 includes a drive member 411 and an output member 412. The method for adjusting the specifications of the building drum includes: according to the size of the tire to be processed, the output member 412 is driven by the drive member 411 to axially move to a contracted position or an intermediate position, and the reducer 43 is located at the minimum diameter or the intermediate diameter; after pasting the material or installing the steel ring, the output member 412 is driven by the drive member 411 to move to the expanded position, and the reducer 43 is changed to the maximum diameter; after processing is completed, the output member 412 is driven by the drive member 411 to move to the contracted position, and the diameter of the reducer 43 is reduced to remove the processed tire.

[0028] In this embodiment, the driving component 41, the transmission component 42 and the reducing member 43 cooperate to realize the radial expansion and contraction of the forming drum specification adjustment device, so that the forming drum specification adjustment device can form a cylindrical outer surface in the radial position as needed to fit the various half-component materials that make up the tire. When in use, the driving member 411 first drives the output member 412 to move axially, so that the output member 412 is located in the contracted position or the middle position. The output member 412 can drive the reducing member 43 to move through the transmission component 42, so that the diameter of the reducing member 43 is adjusted to a smaller minimum diameter or middle diameter, so that operations such as tire fitting can be performed. After completion, the output member 412 is driven again to move to the expanded position, so that the diameter of the reducing member 43 can be expanded, so that subsequent operations such as fixing the steel rim and inflating the tire can be performed. After the processing is completed, the diameter of the reducing member 43 is reduced and the tire can be removed. Through the above setting method, the forming drum specification adjustment device can process tires of multiple sizes during tire production, and there is no need to replace the side drum, only the diameter size needs to be adjusted, thereby simply and quickly realizing the processing of tires of multiple sizes, which not only saves time and effort, but also improves processing efficiency and avoids various losses caused by replacing the side drum.

[0029] This embodiment illustrates the building drum gauge adjustment method and device as applied to a tire manufacturing method and device, respectively. Accordingly, the building drum gauge adjustment device comprises the locking block assembly 40 and the intermediate drum assembly 50 of the tire manufacturing device. Of course, the building drum gauge adjustment method and device can also be applied to other applications as needed, and the backing plate assembly 30 of the tire manufacturing device can also utilize the building drum gauge adjustment device of this embodiment.

[0030] As shown in Figures 2 and 3, a tire production device using the above-mentioned forming drum specification adjustment device includes a main shaft 10 and a turn-up rod assembly 20, a pad assembly 30, a locking block assembly 40 and a middle drum assembly 50 sleeved outside the main shaft 10. The tire production method using the above-mentioned forming drum specification adjustment method specifically includes: adjusting the initial diameters of the pad assembly 30, the locking block assembly 40 and the middle drum assembly 50, and performing material pasting; installing the tire steel rim outside the locking block assembly 40, adjusting the locking block assembly 40, and adjusting the initial diameters of the locking block assembly 40. The diameter is increased, and the locking block assembly 40 is pressed against the tire rim to lock it; the diameters of the pad assembly 30 and the middle drum assembly 50 are adjusted so that the outer surfaces of the pad assembly 30, the locking block assembly 40 and the middle drum assembly 50 are flush and form a flat and uniform surface; the turn-up rod assembly 20 flips to adhere the rubber to the side of the tire, and after the adhesion is completed, the turn-up rod assembly 20 reverses and resets; the diameters of the pad assembly 30, the locking block assembly 40 and the middle drum assembly 50 are adjusted to be smaller, and the tire is removed from the main shaft 10.

[0031] In this embodiment, the backing plate assembly 30, the locking block assembly 40, and the middle drum assembly 50 can expand and contract radially, thereby forming a cylindrical outer surface at each radial position to fit the various half-component materials that make up the tire. During use, the initial diameters of the backing plate assembly 30, the locking block assembly 40, and the middle drum assembly 50 are adjusted according to the size of the tire to be processed, so that the cylindrical outer surface formed by the three components meets the processing requirements such as material attachment. The rim can then be installed and the material attached. By adjusting and expanding the diameter formed by the three components, the rim can be fixed and a flat circular surface can be formed. The tire can then be processed and formed by using the turn-up rod assembly 20 and inflation. After processing is completed, the diameters of the backing plate assembly 30, the locking block assembly 40, and the middle drum assembly 50 can be reduced to remove the tire. Since the diameters of the backing plate assembly 30, the locking block assembly 40, and the middle drum assembly 50 are all adjustable, only the diameters of the three components need to be adjusted accordingly when processing tires of different sizes. The above-described configuration method enables the tire production device to process tires of multiple sizes without having to replace the side drums, requiring only adjustment of the diameter. This allows for simple and quick processing of tires of multiple sizes, saving time and effort while improving processing efficiency and avoiding the various losses associated with replacing side drums. Furthermore, a single device can process tires of two sizes, reducing manufacturing costs.

[0032] This embodiment uses the processing of two-size tires as an example. The two size levels are divided into a smaller first preset size and a second preset size. When adjusting the initial diameter, if the size of the tire to be processed is the first preset size, the backing plate assembly 30 is contracted, and the locking block assembly 40 and the middle drum assembly 50 are adjusted to the minimum diameter. Subsequent diameter expansion can be naturally limited by the steel ring, etc.; if the size of the tire to be processed is the second preset size, which is larger than the first preset size, the backing plate assembly 30 is expanded during adjustment, and the locking block assembly 40 and the middle drum assembly 50 are adjusted to the intermediate diameter. Subsequent expansion can be adjusted to the maximum diameter. Of course, in addition to processing tires of two size levels, more adjustable diameters can also be added to process tires of more size levels.

[0033] In this embodiment, before the turn-up rod assembly 20 flips over, the forward and backward driving member 33 of the pad assembly 30 drives the pad block 32 of the pad assembly 30 to move axially, and makes the pad block 32 avoid the roller 21 of the turn-up rod assembly 20. Then the turn-up rod assembly 20 flips over, and the roller 21 of the turn-up rod assembly 20 squeezes the rubber material to stick the rubber material to the side of the tire. The pad block 32 has movements in both radial and axial directions. The radial movement is to adjust the diameter to adapt to tires of different sizes, while the axial movement is to block or avoid the roller 21 of the turn-up rod assembly 20. Specifically, when the turn-up rod assembly 20 is not moving, the pad assembly 30 blocks the roller 21 of the turn-up rod assembly 20, so that the outer surface of the device forms a flat arc surface, avoiding unevenness that affects operations such as material pasting. When the turn-up rod assembly 20 needs to move, the pad block 32 can avoid the roller 21 under the drive of the advance and retreat drive member 33, so that the turn-up rod assembly 20 can process the tire normally.

[0034] In this embodiment, when adjusting the diameter of the pad assembly 30, the first inclined surface of the expansion driving member 31 of the pad assembly 30 and the second inclined surface of the pad block 32 of the pad assembly 30 are pressed together, and through the interaction between the two, the diameter of the pad block 32 can shrink or expand to the required size.

[0035] In this embodiment, the structures of the locking block assembly 40 and the middle drum assembly 50 are substantially the same, and the diameter adjustment methods of the two are also the same. Depending on the different structures adopted by the locking block assembly 40 and the middle drum assembly 50, the specific adjustment methods can be adopted in the following ways, specifically:

[0036] Method 1

[0037] The locking block assembly 40 and the middle drum assembly 50 include a drive assembly 41, a transmission assembly 42, and a reducer 43. The drive assembly 41 includes a cylinder and a piston, wherein the cylinder has multiple air chambers, and the piston cooperates with the air chambers. By applying pressure to different air chambers in the cylinder of the drive assembly 41 of the locking block assembly 40 or the middle drum assembly 50, the air chambers of the cylinder drive the piston of the drive assembly 41 to move different distances due to the different sizes of the air chambers, thereby causing the piston to move between a retracted position, an intermediate position, and an expanded position. The movement distance of the piston directly affects the diameter of the reducer 43, thereby causing the transmission assembly 42 of the locking block assembly 40 or the middle drum assembly 50 to drive the reducer 43 of the locking block assembly 40 or the middle drum assembly 50 to change to the minimum diameter, the intermediate diameter, or the maximum diameter.

[0038] Method 2

[0039] The locking block assembly 40 and the middle drum assembly 50 still include the aforementioned components, the difference being that the cylinder does not have air cavities of varying sizes, but is further provided with an elastic member 413 that abuts the piston. When the elastic member 413 is in its natural state, the piston is positioned at an intermediate position under the action of the elastic member 413. By applying pressure to the cylinder of the drive assembly 41, the piston is driven to compress or stretch the elastic member 413, moving it to a contracted or expanded position. When the piston is required to be in an intermediate position, no pressure is applied to the cylinder, and the piston is moved to the intermediate position under the action of the elastic member 413 of the drive assembly 41. In this way, the transmission assembly 42 can drive the reducing member 43 to change to the minimum diameter, maximum diameter, or intermediate diameter.

[0040] Method 3

[0041] The drive assembly 41 of the locking block assembly 40 and the middle drum assembly 50 includes a motor, a leadscrew, and a nut that are connected to each other. The motor of the drive assembly 41 drives the leadscrew of the drive assembly 41 to rotate, which in turn drives the nut of the drive assembly 41 to axially move, allowing the nut to move between a retracted position, an intermediate position, and an expanded position. The nut can then be driven by the reducer 43 via the transmission assembly 42 to change to a minimum diameter, an intermediate diameter, or a maximum diameter.

[0042] The three aforementioned methods all achieve control over the diameter of the reducer 43 by controlling the axial movement distance of the output end of the drive assembly 41. Of course, in addition to the three aforementioned methods, other methods can also be used to adjust the diameter of the reducer 43. Furthermore, when adjusting the diameters of the backing plate assembly 30, the locking block assembly 40, and the middle drum assembly 50, a step-by-step adjustment method can be employed, such as setting multiple intermediate positions and intermediate diameters of varying sizes. Alternatively, a stepless adjustment method can be employed, such as using any diameter between the maximum and minimum diameters as an intermediate diameter, and adjusting the diameters of the backing plate assembly 30, the locking block assembly 40, and the middle drum assembly 50 to the desired size through stepless adjustment.

[0043] This embodiment also provides a forming drum specification adjustment device, which is used in a tire production device. As shown in Figures 2 and 3, the tire production device includes a main shaft 10, a turn-up rod assembly 20, a pad assembly 30, a locking block assembly 40 and a middle drum assembly 50. The turn-up rod assembly 20 is used to process the side of the tire; the pad assembly 30 is sleeved on the main shaft 10, and the pad assembly 30 can expand and contract along the radial direction of the main shaft 10; the locking block assembly 40 is sleeved on the main shaft 10, and the locking block assembly 40 can expand and contract along the radial direction of the main shaft 10; the middle drum assembly 50 is sleeved on the main shaft 10, and the middle drum assembly 50 can expand and contract along the radial direction of the main shaft 10. There are multiple pad assemblies 30, locking block assemblies 40 and turn-up rod assemblies 20, and the locking block assemblies 40, pad assembly 30 and turn-up rod assembly 20 are sequentially arranged on both sides of the middle drum assembly 50 in a direction away from the middle drum assembly 50. As mentioned above, through the mutual cooperation between the above-mentioned components and the adjustment between the component formations, the tire production device can process tires of multiple sizes, and there is no need to replace the side drum, only the diameter size needs to be adjusted, thereby realizing the processing of tires of multiple sizes simply and quickly, which not only saves time and effort, but also improves processing efficiency and avoids various losses caused by replacing the side drum.

[0044] As shown in FIG3 , the backing plate assembly 30 includes an expansion driver 31 and a backing plate 32. The expansion driver 31 is disposed axially along the main shaft 10. The backing plate 32 abuts against the output end of the expansion driver 31. Driven by the expansion driver 31, the backing plate 32 can expand and contract radially along the main shaft 10. Specifically, the output end of the expansion driver 31 has a first inclined surface, and the inner side of the backing plate 32 has a second inclined surface. The first inclined surface abuts and presses against the second inclined surface. Thus, when the expansion driver 31 is actuated, the first inclined surface presses against the second inclined surface, converting the axial motion of the expansion driver 31 into radial motion, thereby driving the backing plate 32 to expand and contract.

[0045] In this embodiment, the turn-up rod assembly 20 has a roller 21 at one end close to the middle drum assembly 50, and the pad assembly 30 also includes an advance and retreat drive member 33. The advance and retreat drive member 33 is arranged along the radial direction of the main shaft 10 and is directly or indirectly driven and connected to the pad block 32. In addition to the function of changing the diameter, the pad block 32 also has the function of blocking the roller 21. Specifically, when the turn-up rod assembly 20 is not in motion, the pad block 32 blocks the roller 21 under the action of the advance and retreat drive member 33, thereby forming a flat arc surface on the outer surface of the device. When the turn-up rod assembly 20 needs to move, the advance and retreat drive member 33 drives the pad block 32 to withdraw from the roller 21, so that the turn-up rod assembly 20 can normally process the side of the tire.

[0046] In this embodiment, the locking block assembly 40 and the middle drum assembly 50 are the forming drum specification adjustment devices, and their structures are roughly the same. Both include a drive assembly 41, a transmission assembly 42 and a reducer 43. The transmission assembly 42 is driven and connected to the drive assembly 41. The drive assembly 41 is arranged along the axial direction of the main shaft 10, that is, the axial direction of the drive assembly 41 is perpendicular to the expansion direction of the reducer 43. The reducer 43 is connected to the transmission assembly 42. The reducer 43 forms an arc surface as the outermost side of the entire device, so as to be used for bonding rubber. The reducer 43 can expand and contract along the radial direction of the main shaft 10 under the drive of the transmission assembly 42 to switch between the minimum diameter and the maximum diameter.

[0047] Generally speaking, the reducing member 43 of the locking block assembly 40 is a locking block slider, which is used to cooperate with the steel ring to lock the steel ring. The reducing member 43 of the middle drum assembly 50 is a middle drum plate, which is located in the axial center of the main shaft 10 and is used to cooperate with the rubber. Preferably, the reducing member 43 of the middle drum assembly 50 and the backing plate 32 of the backing plate assembly 30 of this embodiment both adopt a toothed block structure.

[0048] One difference between the locking block assembly 40 and the middle drum assembly 50 lies in the specific structure of the transmission assembly 42. The transmission assembly 42 of the locking block assembly 40 is a bent connecting rod, one end of which is rotatably connected to the output end of the drive assembly 41 and the other end is rotatably connected to the reducer 43. By pushing the connecting rod by the drive assembly 41, the connecting rod rotates and drives the reducer 43 radially, thereby changing the direction of motion. The transmission assembly 42 of the middle drum assembly 50 includes not only the connecting rod but also a middle drum slider. The end of the connecting rod facing away from the drive assembly 41 is connected to the middle drum slider, which in turn is connected to the reducer 43, thereby driving the reducer 43 radially. Of course, in addition to the above-described configuration, the transmission assembly 42 can also include other components as needed. It should be noted that although the transmission assemblies 42 of the locking block assembly 40 and the middle drum assembly 50 differ in structure, their functions are the same: transmission and steering.

[0049] As mentioned above, in terms of structure, the driving assembly 41 includes a driving member 411 and an output member 412. The output member 412 moves along the axial direction of the driving member 411, so that the movement direction of the output member 412 is perpendicular to the expansion direction of the diameter reducing member 43. The specific structure has the following three structural forms:

[0050] Method 1

[0051] The driving member 411 is a cylinder, and the output member 412 is a piston. The piston is movably disposed within the cylinder and connected to the transmission assembly 42. The cylinder can form multiple air chambers of different sizes. When pressure is applied to the air chambers of different sizes, the piston moves different distances. When the piston moves to one end of the cylinder, it is in a contracted position; when it moves to the other end, it is in an expanded position; when it moves to the middle of the cylinder ends, it is in an intermediate position. In these three positions, the diameter reducing member 43 respectively forms a minimum diameter, a maximum diameter, and a diameter intermediate between the minimum and maximum diameters. In this way, by applying pressure to different air chambers, the piston can be moved different distances, thereby causing the diameter reducing member 43 to form different diameters.

[0052] Method 2

[0053] The driving member 411 is a cylinder, the output member 412 is a piston, and the driving assembly 41 further includes an elastic member 413. The piston is movably disposed within the cylinder. This embodiment differs from the first embodiment in that this embodiment does not provide air chambers of varying sizes, but rather controls the movement of the piston via the elastic member 413. The elastic member 413 abuts the piston and is connected to the transmission assembly 42. The piston has a contracted position, in which it moves to the end of the cylinder, an expanded position, and an intermediate position between the contracted and expanded positions. When the elastic member 413 is in its natural state, the piston is in the intermediate position. Thus, when the reducer 43 is required to form a minimum or maximum diameter, pressure is applied to both sides of the piston in the cylinder or positive or negative pressure is applied to one side of the piston, respectively. When the reducer 43 is required to form an intermediate diameter, no pressure is applied to the cylinder, and the piston moves and remains in the intermediate position under the action of the elastic member 413. That is, when the piston is in the contracted, intermediate, and expanded positions, the reducer 43 forms a minimum diameter, an intermediate diameter, and a maximum diameter, respectively, with increasing diameters, thereby achieving a change in the diameter size of the reducer 43. The structure shown in the drawings of this embodiment adopts this method. The elastic member 413 can be selected from elastic components such as springs as needed.

[0054] Method 3

[0055] The driving member 411 is a motor, and the output member 412 is a lead screw and a nut. This method adopts a motor-driven method. Since the motor drive can accurately control the stroke, the lead screw is directly connected to the motor drive and rotates under the drive of the motor. The nut is matched with the lead screw thread and connected to the transmission assembly 42. In this way, when the diameter of the reducing member 43 needs to be changed, the lead screw is driven by the motor to rotate, and the lead screw drives the nut to move axially between the contracted position, the intermediate position and the expanded position, so that the reducing member 43 can form a minimum diameter, an intermediate diameter and a maximum diameter with increasing diameters.

[0056] Through the above-mentioned method, the driving assembly 41 can drive the diameter-changing member 43 to move to the required position.

[0057] The above-mentioned intermediate positions and intermediate diameters can be set to one or more as needed, and the diameters of the pad assembly 30, the locking block assembly 40 and the middle drum assembly 50 can be adjusted between the minimum diameter, the maximum diameter and the intermediate diameters through step-by-step or stepless adjustment.

[0058] It should be noted that, in the above embodiments, a plurality refers to at least two.

[0059] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0060] 1. It solves the problem of time-consuming and labor-intensive replacement of mechanical forming drums in the prior art;

[0061] 2. The tire production device can process tires of multiple sizes without the need to replace the side drum, making it easy and quick to process tires of multiple sizes.

[0062] 3. Save time and labor, improve processing efficiency, and avoid various losses caused by replacing the side drum;

[0063] 4. One device can process two-inch tires, reducing manufacturing costs.

[0064] Obviously, the embodiments described above are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0065] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for adjusting the specifications of a building drum, characterized in that: The forming drum specification adjustment device comprises a driving assembly (41), a transmission assembly (42) and a reducing member (43) connected in sequence, wherein the driving assembly (41) comprises a driving member (411) and an output member (412). The forming drum specification adjustment method comprises: According to the size of the tire to be processed, the output member (412) is driven by the driving member (411) to axially move to a contracted position or an intermediate position, and the diameter-changing member (43) is positioned at a minimum diameter or an intermediate diameter; After the material is attached or the steel ring is installed, the output member (412) is driven to move toward the expanded position by the driving member (411), and the diameter-changing member (43) is changed toward the maximum diameter; After the processing is completed, the output member (412) is driven by the driving member (411) to move toward the contracted position, and the diameter of the reducing member (43) is reduced, so that the processed tire is removed.

2. The method for adjusting the specifications of the forming drum according to claim 1, characterized in that: The driving member (411) is a cylinder, and the output member (412) is a piston. When the piston moves to the end of the cylinder, it is located in the contraction position or the expansion position. When the piston is located between the two ends of the cylinder, it is located in the intermediate position. There is at least one intermediate position, and the position of the piston is controlled by controlling the stroke distance of the piston in the cylinder.

3. The method for adjusting the specifications of the forming drum according to claim 2, characterized in that: The cylinder can form a plurality of air chambers of different sizes, and by applying pressure to the air chambers of different sizes, the piston is driven to move different distances, so that the piston moves in the contracted position, the intermediate position and the expanded position.

4. The method for adjusting the specifications of the forming drum according to claim 2, characterized in that: The drive assembly (41) further includes an elastic member (413). When the elastic member (413) is in a natural state, the piston is located in the middle position. By applying pressure to the cylinder, the piston moves to the contracted position or the expanded position. By not applying pressure to the cylinder, the piston is located in the middle position.

5. The method for adjusting the specifications of the forming drum according to claim 1, characterized in that: The driving member (411) is a motor, and the output member (412) is a lead screw and a nut. The lead screw is driven to rotate by the motor, and the lead screw drives the nut to move between the contracted position, at least one of the intermediate positions, and the expanded position.

6. The method for adjusting the specifications of the forming drum according to claim 1, characterized in that: When adjusting the diameter of the diameter-changing member (43), a step-by-step adjustment or a stepless adjustment method is used for adjustment.

7. A forming drum specification adjustment device, characterized in that: include: A drive assembly (41), the drive assembly (41) comprising a drive member (411) and an output member (412) in drive connection, wherein the output member (412) is capable of adjusting a driving distance along an axial direction of the drive member (411), and has a contracted position and an expanded position at its extremes of movement, and at least one intermediate position between the contracted position and the expanded position; a transmission assembly (42), the transmission assembly (42) being drivingly connected to the output member (412); A reducing member (43) is connected to the transmission assembly (42); the output member (412) drives the transmission assembly (42) to move, thereby driving the reducing member (43) to change the diameter; and when the output member (412) is located at the contracted position, the intermediate position, and the expanded position, the reducing member (43) respectively forms a minimum diameter, an intermediate diameter, and a maximum diameter with increasing diameters.

8. The forming drum specification adjustment device according to claim 7, characterized in that: The driving member (411) is a cylinder, and the output member (412) is a piston. When the piston moves to the end of the cylinder, it is located at the contraction position or the expansion position. When the piston is located between the two ends of the cylinder, it is located at the middle position.

9. The forming drum specification adjustment device according to claim 8, characterized in that: The cylinder can form a plurality of air chambers of different sizes. When pressure is applied to the air chambers of different sizes, the piston can move different distances to move between the contracted position, the intermediate position, and the expanded position.

10. The forming drum specification adjustment device according to claim 8, characterized in that: The driving assembly (41) further includes an elastic member (413) abutting against the output member (412); when the elastic member (413) is in a natural state, the piston is located in the middle position; when pressure is applied to the cylinder, the piston can move to the contracted position or the expanded position; when no pressure is applied to the cylinder, the piston is located in the middle position under the action of the elastic member (413).

11. The forming drum specification adjustment device according to claim 7, characterized in that: The driving member (411) is a motor, and the output member (412) is a lead screw and a nut. The nut is connected to the transmission assembly (42). When the motor drives the lead screw to rotate, the lead screw drives the nut to move between the contracted position, the intermediate position, and the expanded position.

12. The forming drum specification adjustment device according to claim 7, characterized in that: The forming drum specification adjustment device is a backing plate assembly (30), a locking block assembly (40) or a middle drum assembly (50).