Variable-diameter roller set

Abstract

The invention discloses a variable-diameter roller set which comprises a support. The at least one variable-diameter roller is rotationally connected to the bracket and is connected with a first driving device for driving the variable-diameter roller to rotate; the at least one executing piece is mounted on the variable-diameter roller; the adjusting plate is connected to the bracket in a sliding manner; the at least one matching piece is mounted on the adjusting plate and located on one side of the corresponding variable-diameter roller, and the matching piece can be matched with the corresponding executing piece to conduct machining treatment; the second driving device is arranged between the adjusting plate and the support and used for driving the adjusting plate to move in the sliding direction of the adjusting plate so as to adjust the distance between the matching piece and the variable-diameter roller. The device has the advantages that the effective working diameter of the device can be conveniently and quickly adjusted to meet the machining requirements of products of different specifications, so that the flexibility and efficiency of a production line are improved, and the operation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of processing roller groups, and in particular to a variable diameter roller group. Background Art

[0002] In modern industrial production, particularly in the fields of flexible packaging, paper product processing, and sanitary product manufacturing, continuous rolls of substrates often undergo a series of processing steps on automated production lines for products such as paper bags, plastic bags, non-woven bags, sanitary napkins, and diapers. These steps include, but are not limited to, cross-cutting, creasing, gluing, heat sealing, and printing.

[0003] To achieve precise positioning and periodic operations on high-speed moving substrates, the industry generally utilizes a processing roller assembly. Specifically, components performing specific functions, such as cutting blades, dispensing heads, and creasing strips, are mounted on the circumferential surface of a processing roller. As the roller rotates synchronously with the substrate, the functional components periodically contact the substrate, completing the predetermined processing action. In this configuration, the circumference of the roller directly determines the processing pitch—the length of a single product. For example, during the cutting process, each rotation of the cutting roller completes a cut of a fixed-length product.

[0004] However, the diameter of the processing roller commonly used in the prior art is usually fixed. The inherent defects of this design lead to one or more of the following significant technical problems:

[0005] Poor production flexibility: One roller specification can only handle one product size. When a production order requires a product of a different specification (such as a different length), the entire roller must be shut down and replaced. This time-consuming and labor-intensive process leads to frequent production line downtime, seriously affecting production efficiency and overall equipment effectiveness.

[0006] Low equipment versatility: The scope of application of a single device is strictly limited, and it is impossible to achieve multiple uses for one machine, resulting in a waste of equipment investment.

[0007] High cost: Manufacturers must pre-customize and stock multiple sets of rollers corresponding to different product sizes, which significantly increases the high mold manufacturing costs.

[0008] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and the present invention is made based on this situation. Summary of the Invention

[0009] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a variable diameter roller group that can adjust its effective working diameter conveniently and quickly to meet the processing requirements of products of different specifications, thereby improving the flexibility and efficiency of the production line and reducing operating costs.

[0010] The present invention is achieved through the following technical solutions:

[0011] In order to solve the above technical problems, the present invention provides a variable diameter roller group, comprising:

[0012] Bracket;

[0013] at least one variable diameter roller, the variable diameter roller being rotatably connected to the bracket and connected to a first driving device for driving the variable diameter roller to rotate;

[0014] At least one actuator mounted on the variable diameter roller;

[0015] an adjusting plate, slidably connected to the bracket;

[0016] At least one mating member, mounted on the adjustment plate and located on one side of the corresponding variable-diameter roller, the mating member being capable of mating with the corresponding actuator to perform processing; and

[0017] The second driving device is provided between the adjusting plate and the bracket, and is used for driving the adjusting plate to move along its sliding direction so as to adjust the distance between the fitting and the diameter-changing roller.

[0018] In order to further solve the technical problem to be solved by the present invention, the present invention provides a variable diameter roller assembly, wherein the variable diameter roller comprises:

[0019] a main shaft, rotatably connected to the bracket;

[0020] A screw, movably connected to the main shaft and capable of rotating relative to the main shaft, the screw being connected to a variable diameter driver for driving the screw to rotate forward and reverse;

[0021] A plurality of sliders are threadedly connected to the screw rod and are slidably connected along the axial direction of the main shaft;

[0022] at least one moving frame, each of the moving frames being parallel to the main axis; and

[0023] A plurality of connecting rods, both ends of which are rotatably connected to the slider and the movable frame;

[0024] Wherein, the actuator is detachably mounted on the outer side of the movable frame.

[0025] In order to further solve the technical problem to be solved by the present invention, the present invention provides a variable diameter roller group, in which each of the movable frames is connected to two different sliders through at least two different connecting rods, the two different connecting rods are equal in length and arranged opposite to each other, and the two different sliders have threads with different rotation directions; so that when the screw rotates, the two different sliders can move at the same speed toward or away from each other, thereby causing the movable frame to move radially in parallel.

[0026] In order to further solve the technical problem to be solved by the present invention, the present invention provides a variable diameter roller group, wherein the first driving device includes a driving motor arranged on a bracket, a driving wheel arranged on an output shaft of the driving motor, a driven wheel arranged on the main shaft of the variable diameter roller, and a transmission belt wound between the driving wheel and the driven wheel.

[0027] In order to further solve the technical problem to be solved by the present invention, in a variable diameter roller assembly provided by the present invention, a self-centering expansion sleeve is provided between the main shaft and the driven wheel to connect the two.

[0028] In order to further solve the technical problem to be solved by the present invention, the present invention provides a variable diameter roller group, wherein the second driving device includes a driving shaft rotatably connected to the bracket, a first driver for driving the driving shaft to rotate, a first rocker arm connected to the driving shaft at one end, and a second rocker arm rotatably connected to the first rocker arm and the adjustment plate at both ends.

[0029] In order to further solve the technical problem to be solved by the present invention, the present invention provides a variable diameter roller group, in which the mating part is slidably connected to the adjustment plate, and a third driving device is provided between the adjustment plate and the mating part for independently driving the corresponding mating part to approach and move away from the variable diameter roller.

[0030] In order to further solve the technical problem to be solved by the present invention, in a variable diameter roller group provided by the present invention, a mounting rail is provided on the outer surface of the movable frame, and the actuator is detachably mounted on the mounting rail by a fastener.

[0031] In order to further solve the technical problem to be solved by the present invention, the present invention provides a variable diameter roller group, in which the actuator includes a tool holder that can be slidably fitted on a mounting rail, and the tool holder is provided with a mounting groove extending along the axial direction, and a plurality of tool modules are installed in the mounting groove through fasteners; and the mating part is a tool groove roller that is rotatably connected to the adjustment plate and can abut against the cutting edge of the tool module.

[0032] In order to further solve the technical problem to be solved by the present invention, the present invention provides a variable diameter roller group, in which the actuator includes a dispensing frame that can be slidably fitted on the mounting rail, and a plurality of mounting holes are provided on the outer side surface of the dispensing frame, and a dispensing head is installed in all or part of the mounting holes; and the mating component includes a glue tray provided on one side of the variable diameter roller, a glue delivery roller provided above the glue tray and capable of abutting against the glue delivery head, and an upper glue roller provided between the glue tray and the glue delivery roller and used to transfer the glue in the glue tray to the glue delivery roller, and the upper glue roller and the glue delivery roller are transmission-connected with a fourth drive device for driving the two to rotate; the mating component also includes a paper feeding eccentric roller provided on the other side of the variable diameter roller and capable of abutting against the glue delivery head.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] The present invention creatively designs a dual dynamically adjustable processing system. Its core is a variable diameter roller, which can realize online, continuous and precise adjustment of the working diameter of the processing actuator through the built-in servo motor driving the lead screw and connecting rod mechanism to match the product specifications of different lengths. At the same time, the matching parts are installed on the adjustment plate that can be fine-tuned as a whole and independently, and can synchronously adapt to the changes in diameter and always maintain the optimal processing gap and matching state. This coordinated adjustment design of the variable diameter mechanism and the matching mechanism completely solves the pain point of the existing technology that the entire fixed diameter roller must be stopped and replaced due to the change of product specifications, thereby greatly improving the flexibility and automation level of the production line, significantly shortening the production change time, reducing the manufacturing cost and storage cost of the spare roller, and enabling the equipment to quickly respond to the market demand for "small batch, multiple varieties". BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0036] Figure 1 is a schematic diagram of the three-dimensional structure of embodiment 1;

[0037] Figure 2 1 is a schematic diagram of the three-dimensional structure of the variable diameter roller in Example 1;

[0038] Figure 3 1 is a schematic diagram of the partial structure of the variable diameter roller in Example 1;

[0039] Figure 4 is a schematic cross-sectional view of Example 1;

[0040] Figure 5 is a schematic diagram of the three-dimensional structure of embodiment 2;

[0041] Figure 6 Schematic diagram of the three-dimensional structure of the variable diameter roller in the second embodiment;

[0042] Figure 7 is a cross-sectional schematic diagram of Example 2;

[0043] Figure 8 It is a schematic diagram of the three-dimensional structure of embodiment three. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0045] See also Figures 1 to 7This embodiment discloses a variable diameter roller assembly for performing periodic processing such as cutting, creasing or gluing on continuous strip or tubular materials (such as paper bags, paper, plastic films, etc.).

[0046] like Figure 1 and Figure 4 As shown, the overall structure of the variable-diameter roller assembly includes a bracket 1. In this embodiment, the bracket 1 is composed of two symmetrical side panels and several transverse connecting plates connected between the side panels, forming a stable frame structure and providing a mounting base for other components. Bracket 1 is also equipped with several tensioning rollers and guide rollers (specific reference numbers not shown) for guiding and tensioning the strip material, depending on process requirements.

[0047] The core component of this roller assembly is at least one variable-diameter roller 2, rotatably mounted between the two side plates of a support 1. A first drive device 3 is provided to drive the variable-diameter roller 2. Furthermore, at least one actuator 4 is mounted on the circumference of the variable-diameter roller 2 to perform a specific processing task.

[0048] In order to cooperate with the actuator 4 to complete the processing, an adjustment plate 5 is provided. The adjustment plate 5 is slidably connected to the inner side of the bracket 1 through a guide rail slider structure. Preferably, the sliding direction is designed to be an inclined direction (for example, obliquely upward), so that when the position of the adjustment plate 5 is adjusted, the horizontal distance and vertical distance between it and the variable diameter roller 2 can be changed at the same time, providing a more flexible matching gap for different processes. At least one matching part 6 is installed on the adjustment plate 5, and the matching part 6 is located on one side of the corresponding variable diameter roller 2 and can interact with the actuator 4 during processing. In order to drive the movement of the adjustment plate 5, a second drive device 7 is provided between the adjustment plate 5 and the bracket 1.

[0049] In actual operation, the first drive device 3 drives the variable diameter roller 2 to rotate at a specific speed, and the strip material passes between the variable diameter roller 2 and the mating member 6. When the actuator 4 rotates to a position facing the mating member 6, the two work together to complete the processing of the material.

[0050] The main innovation of this invention lies in the adjustable working diameter of the variable-diameter roller 2, while the position of the mating member 6 can also be adjusted by driving the adjustment plate 5 via a second drive device 7. This dual-adjustable design greatly improves the flexibility of the equipment, enabling it to quickly adapt to the production needs of products of different length specifications.

[0051] The preferred structures of each key component will be described in detail below.

[0052] Detailed structure of the variable diameter roller 2:

[0053] See also Figure 2 and Figure 3The variable diameter roller 2 includes a central main shaft 21, and both ends of the main shaft 21 are rotatably connected to the bracket 1 through bearings. In the internal hollow area of the main shaft 21, a screw 22 is movably penetrated. The screw 22 can rotate circumferentially relative to the main shaft 21, and can rotate forward and backward. One end of the screw 22 is connected to a variable diameter driver 23. The variable diameter driver 23 (preferably a high-precision servo motor) is fixedly mounted on the bracket 1. Under normal working conditions, when the main shaft 21 rotates, the variable diameter driver 23 is in an unpowered state, and the screw 22 can rotate with the main shaft 21. Of course, this design requires locking the variable diameter during the rotation of the main shaft 21 (detailed below). The variable diameter driver 23 will only be started when the turning radius of the variable diameter roller 2 needs to be adjusted. During the adjustment process, the variable diameter driver 23 reverses (relative to the main shaft 21), thereby driving the screw 22 to reverse, and then driving the variable diameter roller 2 to change diameter.

[0054] Of course, in another solution, the variable diameter driver 23 can also be directly fixedly installed on the main shaft 21, and the variable diameter driver 23 is also electrically connected to the external power supply device through a conductive ring.

[0055] Several (e.g., two, three, or four) sliders 24 are threadedly connected to the screw 22, forming a ball screw pair that achieves high transmission efficiency and precision. These sliders 24 are also slidably connected to the inner wall of the spindle 21 or a guide rail provided on the spindle, thus allowing them to move only along the axis of the spindle 21 and not rotate with the screw 22 (during the diameter change process).

[0056] Two or more movable frames 25 are provided outside the main shaft 21 and parallel to the main shaft 21. These movable frames 25 are connected to the sliders 24 via multiple connecting rods 26. Specifically, one end of each connecting rod 26 is rotatably connected to a slider 24, and the other end is rotatably connected to the corresponding movable frame 25.

[0057] The diameter-changing mechanism works as follows: When the variable diameter actuator 23 is activated, rotating the screw 22, the slider 24, unable to rotate, moves axially along the threads of the screw 22. This axial movement of the slider 24, driven by the connecting rod 26, propels the movable frame 25 radially outward or inward parallel to the main shaft 21. Consequently, the actuator 4 mounted on the outside of the movable frame 25 changes its rotation radius accordingly, achieving continuous adjustment of the operating diameter of the variable diameter roller 2.

[0058] In order to ensure the smoothness and accuracy of the diameter changing process, in a preferred solution, as Figure 2As shown, each movable frame 25 is connected to two different sliders 24 via at least two equal-length connecting rods 26. The threads on the screws 22 corresponding to these two sliders 24 have opposite rotation directions. This design has the advantage that when the screws 22 rotate in one direction, the two sliders 24 move synchronously and at the same speed toward or away from each other. This symmetrical connecting rod mechanism ensures that the movable frame 25 only translates radially, without axial movement or angular runout, thus ensuring the accuracy and stability of the variable diameter adjustment.

[0059] In this embodiment, the variable-diameter roller 2 is preferably symmetrically arranged with two upper and lower moving frames 25, each mounted with several actuators 4. When adjusting the diameter, the upper and lower moving frames 25 move radially in sync, ensuring dynamic balance of the roller. The variable-diameter drive 23, comprised of a servo motor, precisely controls the travel distance of the moving frames 25, ensuring that the circumference of the actuator 4 formed by one rotation precisely equals the target product length. This helps optimize subsequent synchronization with other parts of the production line and reduces drive load.

[0060] To facilitate operator observation and calibration, a graduated scale plate 27 is radially mounted on the spindle 21. This scale plate 27 extends radially along the spindle, with its distal end proximal to the movable frame 25. By observing the relative position of the movable frame 25 on the scale plate 27, the operator can visually determine the current diameter, serving as an auxiliary calibration tool for the servo motor control system. Furthermore, the device allows for manually changing scale plates 27 to varying lengths, depending on the spindle 21's rotation radius.

[0061] It is worth noting that when there is no need to adjust the turning radius of the variable diameter roller 2, the free end of the ruler plate 27 and the movable frame 25 can be fixed by fasteners (such as screws) to lock the diameter change, thereby avoiding the unexpected diameter change movement of the movable frame 25 after being subjected to force during normal operation.

[0062] Detailed structure of the drive and regulating device:

[0063] See also Figure 1, the first drive device 3 is used to drive the entire variable diameter roller 2 assembly to rotate. It includes a drive motor 31 (preferably a servo motor) mounted on the bracket 1, a driving wheel 32 mounted on the motor output shaft, and a driven wheel 33 fixed to the end of the main shaft 21 of the corresponding variable diameter roller 2, and a transmission belt 34 wound between the driving wheel 32 and the driven wheel 33. In order to achieve precise positioning, it is preferred to use a self-centering expansion sleeve 35 to connect between the main shaft 21 and the driven wheel 33. The expansion sleeve can fine-tune the relative angle between the driven wheel 33 and the main shaft 21 before locking, so that the initial phase (i.e., the initial position) of the actuator 4 can be accurately calibrated to ensure the accuracy of the processing position. In the multi-roller group structure shown in the figure, a drive motor 31 can synchronously drive multiple groups of variable diameter rollers 2 to rotate through a longer transmission belt or gear system.

[0064] See also Figure 1 and Figure 4 The second drive device 7 is used to adjust the position of the adjustment plate 5 as a whole. It includes a drive shaft 71 driven by a first driver 72 (preferably a servo motor, which can be connected to the drive shaft 71 using a bevel gear transmission pair). A first rocker arm 73 is fixed to the drive shaft 71, and the end of the first rocker arm 73 is rotatably connected to the adjustment plate 5 via a second rocker arm 74. When the first driver 72 drives the drive shaft 71 to rotate, it causes the first rocker arm 73 to swing, and the motion is transmitted to the adjustment plate 5 via the second rocker arm 74, causing it to slide along the preset guide rail. This linkage drive method can provide a large driving force and a stable structure.

[0065] Furthermore, in order to achieve more precise and independent adjustment, this embodiment also provides a third driving device 8. Figure 4 As shown, each mating component 6 is not directly fixed to the adjustment plate 5, but is slidably connected to the adjustment plate 5 via an independent horizontal guide rail. Each mating component 6 is equipped with a third drive device 8, which independently drives the mating component 6 toward or away from the variable diameter roller 2. This third drive device 8 is preferably an enclosed screw sliding module integrating a servo motor and a ball screw, enabling micron-level precision positioning. This two-stage adjustment system of "overall coarse adjustment + independent fine adjustment" greatly enhances the device's applicability and adjustment accuracy.

[0066] Specific embodiments of the actuator and the matching parts:

[0067] In order to enable those skilled in the art to better understand the present invention, two specific application examples are given below.

[0068] Example 1: For cutting or creasing

[0069] See also Figures 1 to 4 In this embodiment, the device is used as a cutter or creasing machine.

[0070] In this case, the actuator 4 is a cutter or creasing assembly. Specifically, a mounting rail 251 is provided on the outer surface of the movable frame 25. The actuator 4 includes a tool holder 41 that slidably engages and locks with the mounting rail 251. The tool holder 41 is provided with at least one mounting slot 411 extending along its length. One or more tool modules 42 (such as cutting blades or creasing ribs) can be mounted in the mounting slot 411 using fasteners such as screws.

[0071] The corresponding mating component 6 mounted on the adjustment plate 5 is a grooved roller 61. This freely rotating roller 61 has grooves cut into its surface. During operation, when the cutter module 42 rotates to contact the grooved roller 61, its cutting edge precisely cuts into the grooves of the grooved roller 61. This ensures that the strip material is completely cut or compacted while protecting the blade from direct impact with hard surfaces and damage.

[0072] Example 2: For dispensing

[0073] See also Figures 5 to 7 In this embodiment, the device is used as a glue dispenser.

[0074] At this time, the actuator 4 installed on the variable diameter roller 2 is a glue dispensing assembly. The glue dispensing assembly includes a glue dispensing frame 42, which is detachably mounted on the mounting rail 251 of the mobile frame 25 through a matching structure thereon (for example, a slide groove adapted to the mounting rail 251 is provided thereon, and a locking screw capable of locking the glue dispensing frame 42 on the mounting rail 251). A plurality of mounting holes 421 (usually threaded holes) are preset on the outer surface of the glue dispensing frame 42. These mounting holes 421 can be flexibly arranged at equal or unequal intervals according to the design requirements of the glue dot pattern. A detachable glue dispensing head 43 is installed in the mounting hole 421 corresponding to the position where glue dispensing is required. This modular design gives users great flexibility and can easily change the number, position and combination of glue dispensing heads according to different product requirements to achieve a highly customized glue dispensing pattern.

[0075] The matching component 6 that matches the executive component 4 (glue dispensing component) has a more comprehensive structure in this embodiment, mainly including a gluing unit and a paper feeding support unit.

[0076] The gluing unit is responsible for providing glue to the glue dispensing head 43. Specifically, it includes a glue tray 62 for storing glue, a glue roller 64 and a glue delivery roller 63. During operation, the lower half of the glue roller 64 is immersed in the glue tray 62, and the glue is evenly taken out during rotation. The glue delivery roller 63 is in close contact with the surface of the glue roller 64, and a layer of glue film with uniform thickness is obtained from the glue roller 64 by rotation. In order to drive the glue roller to rotate, a fourth drive device 65 (preferably a motor, which is usually fixed relative to the adjustment plate 5) is also provided. Through a transmission mechanism such as a sprocket chain or a gear set, the glue roller 64 and the glue delivery roller 63 are driven to rotate synchronously to continuously provide fresh, uniform glue film. The gluing unit is integrally mounted on the adjustment plate 5, and its position is precisely adjusted to ensure that the top of the glue dispensing head 43 that is rotated can just contact the surface of the glue delivery roller 63 and dip into the glue.

[0077] The paper feeding support unit provides a stable support for the gluing process. It includes an eccentric paper feeding roller 66. The eccentric paper feeding roller 66 is arranged on the other side of the variable diameter roller 2 (usually below or behind), and its position can abut against the top of the rotating gluing head 43, and clamp the strip material between the two to complete the gluing operation. There are two ways to install and adjust the eccentric paper feeding roller 66: one way is to fix it directly or through a bracket on the adjustment plate 5, so that it can be adjusted as a whole together with the gluing unit; the other more flexible way is to open an independent adjustment slot on the side panel of the bracket 1, and the shaft heads at both ends of the eccentric paper feeding roller 66 are installed in the adjustment slot, and can be slid along the slot and fixed at any position through a locking device, thereby achieving independent position adjustment (such as Figure 7 shown).

[0078] The dispensing process in this embodiment is as follows: The variable-diameter roller 2, driven by the first drive unit 3, rotates, driving the dispensing head 43 on it to move periodically. First, the dispensing head 43 rotates past the gluing unit, where its tip picks up a measured amount of glue from the surface of the glue transfer roller 63. Then, the dispensing head 43, carrying the glue, continues to rotate to the processing position, namely the gap between the variable-diameter roller 2 and the eccentric paper feed roller 66. At this point, the strip of material to be processed is passing through this gap, and the dispensing head 43 precisely applies glue to the predetermined location on the strip, completing an efficient and accurate dispensing operation.

[0079] Another embodiment of the adjustment plate 5 and the second driving device 7 is given below.

[0080] Example 3

[0081] like Figure 8The third embodiment of the present invention is shown. This embodiment differs from the first and second embodiments described above in that it features multiple independent adjustment plates 5, with corresponding actuators 4 mounted on corresponding adjustment plates 5. Each set of adjustment plates 5 corresponds to a second drive device 7. The second drive device 7 is preferably a closed screw-sliding module integrating a servo motor and ball screw, or a sliding module integrating a pneumatic cylinder. In this embodiment, the position of each actuator 4 can only be adjusted individually, not as a whole. This makes it suitable for simultaneously processing products of different specifications (such as cement bags of special specifications).

[0082] The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. A variable diameter roller set, characterized in that: include: Bracket (1); at least one variable-diameter roller (2), the variable-diameter roller (2) being rotatably connected to the bracket (1) and connected to a first driving device (3) for driving the variable-diameter roller (2) to rotate; At least one actuator (4) mounted on the variable diameter roller (2); an adjusting plate (5) slidably connected to the bracket (1); At least one matching piece (6) is mounted on the adjustment plate (5) and is located on one side of the corresponding variable diameter roller, and the matching piece (6) can cooperate with the corresponding actuator (4) to perform processing; as well as The second driving device (7) is provided between the adjusting plate (5) and the bracket (1) and is used to drive the adjusting plate (5) to move along its sliding direction so as to adjust the distance between the fitting (6) and the diameter-changing roller.

2. The variable diameter roller assembly according to claim 1, characterized in that: The variable diameter roller (2) comprises: a main shaft (21) rotatably connected to the bracket (1); a screw (22) movably connected to the main shaft (21) and capable of rotating relative to the main shaft; the screw (22) is connected to a variable diameter driver (23) for driving the screw (22) to rotate forward and reverse; A plurality of sliders (24) are threadedly connected to the screw (22) and are slidably connected along the axial direction of the main shaft (21); at least one moving frame (25), each of the moving frames (25) being parallel to the main axis (21); and A plurality of connecting rods (26), both ends of which are rotatably connected to the slider (24) and the movable frame (25); The actuator (4) is detachably mounted on the outer side of the movable frame (25).

3. The variable diameter roller assembly according to claim 2, characterized in that: Each of the movable frames (25) is connected to two different sliders (24) via at least two different connecting rods (26). The two different connecting rods (26) are of equal length and arranged opposite to each other. The two different sliders (24) have threads with different rotation directions. When the screw rod (22) rotates, the two different sliders (24) can move toward or away from each other at the same speed, thereby causing the movable frame (25) to move radially and parallel.

4. The variable diameter roller assembly according to claim 2, characterized in that: The first driving device (3) comprises a driving motor (31) provided on a bracket (1), a driving wheel (32) provided on an output shaft of the driving motor (31), a driven wheel (33) provided on a main shaft (21) of the variable diameter roller (2), and a transmission belt (34) wound between the driving wheel (32) and the driven wheel (33).

5. The variable diameter roller assembly according to claim 4, characterized in that: A self-centering expansion sleeve (35) is provided between the main shaft (21) and the driven wheel (33) to connect the two.

6. The variable diameter roller assembly according to claim 1, characterized in that: The second driving device (7) comprises a driving shaft (71) rotatably connected to the bracket (1), a first driver (72) for driving the driving shaft (71) to rotate, a first swing rod (73) connected at one end to the driving shaft (71), and a second swing rod (74) rotatably connected at both ends to the first swing rod (73) and the adjustment plate (5).

7. The variable diameter roller assembly according to claim 1, characterized in that: The matching piece (6) is slidably connected to the adjustment plate (5), and a third driving device (8) is provided between the adjustment plate (5) and the matching piece (6) for independently driving the corresponding matching piece (6) to move toward and away from the diameter-changing roller.

8. The variable diameter roller assembly according to claim 2, characterized in that: A mounting rail (251) is provided on the outer side of the movable frame (25), and the actuator (4) is detachably mounted on the mounting rail (251) via a fastener.

9. The variable diameter roller assembly according to claim 8, characterized in that: The actuator (4) includes a tool holder (41) that can be slidably engaged on the mounting rail (251), the tool holder (41) is provided with an axially extending mounting groove (411), and a plurality of tool modules (42) are mounted in the mounting groove (411) via fasteners; and the engaging member (6) is a tool groove roller (61) that is rotatably connected to the adjustment plate (5) and can abut against the cutting edge of the tool module (42).

10. The variable diameter roller assembly according to claim 8, characterized in that: The actuator (4) includes a dispensing frame (42) that can be slidably matched on the mounting rail (251), and a plurality of mounting holes (421) are provided on the outer surface of the dispensing frame (42), and a dispensing head (43) is installed in all or part of the mounting holes (421); and the matching component (6) includes a glue tray (62) provided on one side of the variable diameter roller (2), a glue delivery roller (63) provided above the glue tray (62) and capable of abutting against the dispensing head (43), and a glue upper roller (64) provided between the glue tray (62) and the glue delivery roller (63) and used for transferring glue in the glue tray (62) to the glue delivery roller (63), and the glue upper roller (64) and the glue delivery roller (63) are transmission-connected by a fourth driving device (65) for driving the two to rotate; and the matching component (6) also includes a paper feeding eccentric roller (66) provided on the other side of the variable diameter roller (2) and capable of abutting against the dispensing head (43).

Images