A pay-off reel device with safety guard structure

Abstract

The utility model discloses a kind of safety protection structure unwinding shaft devices with, including unwinding rotary plate, linear slide rail, sliding block, unwinding clamping plate, chuck assembly, driving assembly, safety protection assembly and PLC control unit. Overall safety protection is accurate and reliable, through the linkage of PLC control unit and magnetic switch, cylinder, can real-time sensing paper tube clamping state, quickly trigger chuck limit and motor stop action, effectively avoid paper tube due to excessive clamping damage, protect raw material integrity;High degree of automation, without manual regulation and control clamping force and alignment position, deceleration motor drives chuck automatic translation adaptation, convenient and efficient operation, reduce human error;Wide adaptation range, compatible with a variety of specifications width's non-woven fabric, film and other materials, turnover shaft structure can flexibly adjust working angle, adapt to different production line layout.

Description

Technical Field

[0001] This utility model relates to the technical field of unwinding shaft devices, specifically an unwinding shaft device with a safety protection structure. Background Technology

[0002] In the industrial production of nonwoven fabrics, mica tape, paper, insulating materials, and various thin film materials, the unwinding shaft device is a core piece of equipment ensuring continuous and stable unwinding operations. However, existing unwinding shaft devices have many shortcomings: First, they rely heavily on manual adjustment of clamping force, making it difficult to accurately control the compatibility between the chuck and the paper tube. Over-clamping can easily lead to paper tube damage, while under-clamping can cause slippage and displacement of the paper tube during unwinding. Second, when adapting to raw materials of different widths, the adjustment operation is cumbersome, resulting in significant power loss during transmission and slow chuck movement response. Third, they lack automated safety protection mechanisms, and there is no real-time sensing or linkage braking function, making it impossible to avoid the risk of pinching injuries in time. Fourth, the transmission and support structure design is unreasonable, leading to easy displacement of the chuck during translation and unstable unwinding tension, affecting the accuracy of subsequent processing. With the continuous improvement of industrial production requirements for automation, operational safety, and equipment versatility, existing devices can no longer meet the needs of efficient and accurate unwinding. Therefore, there is an urgent need to develop an unwinding shaft device with automatic alignment, safety protection, and wide adaptability to solve the above-mentioned technical pain points. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a winding device with a safety protection structure, which can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A winding unwinding device with a safety protection structure includes an unwinding rotary plate, a linear slide rail, a slider, an unwinding clamp, a clamp assembly, a drive assembly, a safety protection assembly, and a PLC control unit.

[0006] The linear slide rail is fixed to the unwinding rotary plate, the slider is slidably mounted on the linear slide rail, and the unwinding clamp is fixed to the slider;

[0007] The chuck assembly includes an unwinding mechanical chuck, a right mechanical chuck connecting shaft, a left mechanical chuck connecting shaft, and a chuck bearing seat. The chuck bearing seat is fixed to the unwinding clamp plate. The right and left mechanical chuck connecting shafts are respectively inserted into the chuck bearing seat. The unwinding mechanical chuck is fixed to the opposite ends of the two connecting shafts.

[0008] The drive assembly includes a geared motor, an unwinding screw, and a screw nut mounting base. The unwinding screw is rotatably mounted between the screw nut mounting base and the screw mounting base. The geared motor is connected to the unwinding screw in a transmission manner. The slider is threadedly engaged with the unwinding screw. The geared motor drives the unwinding screw to move the slider along a linear slide rail.

[0009] The safety protection component includes a cylinder, an unwinding cylinder connector, an unwinding push plate, and a magnetic switch. The cylinder is fixed to the unwinding clamping plate. The unwinding cylinder connector connects the cylinder piston rod and the unwinding push plate. The magnetic switch is installed on the cylinder and senses the paper tube clamping status of the unwinding mechanical chuck.

[0010] The PLC control unit is electrically connected to the geared motor, cylinder, and magnetic switch. After the magnetic switch sends a clamping signal to the PLC control unit, the PLC controls the cylinder piston rod to extend, driving the unwinding pusher plate to push the seat body backward and controlling the geared motor to stop.

[0011] As a further description of the above technical solution, it also includes a magnetic powder brake, which is installed on the right side of the mechanical chuck connecting shaft and the unwinding chuck, and is connected to the right side of the mechanical chuck connecting shaft and the left side of the mechanical chuck connecting shaft to drive them to rotate synchronously.

[0012] As a further description of the above technical solution, it also includes a flip shaft, a flip shaft bearing seat, and a flip shaft bearing seat end cover for fixing to the geared motor. The flip shaft is fixed to the bottom of the unwinding rotating plate, the flip shaft bearing seat is rotatably engaged with the flip shaft through a bearing, and the flip shaft bearing seat end cover is fixed to the end of the flip shaft and has a limiting engagement with the flip shaft bearing seat.

[0013] As a further description of the above technical solution, the output shaft of the geared motor is connected to the end of the unwinding screw, the unwinding screw is arranged along the length direction of the unwinding rotating plate, and the linear slide rail is arranged parallel to the unwinding screw.

[0014] As a further description of the above technical solution, the unwinding mechanical chuck is provided in two parts, which are symmetrically arranged on the right and upper left of the mechanical chuck connecting shaft, with the gripping ends of the two chucks facing each other to clamp the paper tube.

[0015] As a further description of the above technical solution, the magnetic switch is installed on the cylinder body, and the magnetic switch is connected to the signal input terminal of the PLC control unit through a wire. The signal output terminal of the PLC control unit is electrically connected to the geared motor drive module and the cylinder solenoid valve, respectively.

[0016] As a further description of the above technical solution, the linear slide rails are provided in two symmetrical arrangement on the unwinding rotating plate, each linear slide rail is equipped with a corresponding slider, and the bottom of the unwinding clamp is fixedly connected to the two sliders.

[0017] As a further description of the above technical solution, the two ends of the unwinding screw are rotatably engaged with the screw nut mounting seat and the screw mounting seat through bearings, and the unwinding screw is threadedly engaged with the bottom nut of the slider.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The unwinding device with a safety protection structure of this utility model has at least one of the following beneficial effects during use:

[0020] Firstly, it offers precise and reliable safety protection. Through the linkage of the PLC control unit with magnetic switches and cylinders, it can sense the paper tube clamping status in real time, quickly triggering the chuck limit and motor stop actions, effectively preventing damage to the paper tube due to over-clamping and ensuring the integrity of the raw materials. Secondly, it boasts a high degree of automation, eliminating the need for manual adjustment of clamping force and alignment. The geared motor drives the chuck to automatically move and adapt, making operation convenient and efficient, and reducing human error. Thirdly, it has a wide range of adaptability, compatible with various specifications and widths of non-woven fabrics, films, and other materials. The flip-shaft structure allows for flexible adjustment of the working angle to adapt to different production line layouts. Fourthly, it operates stably and accurately. The double linear slide rails and symmetrical chuck design ensure smooth chuck movement and balanced force distribution. The magnetic powder brake can precisely adjust the unwinding tension, preventing material stretching or loosening and improving subsequent processing accuracy. Fifthly, its reasonable structural design ensures efficient transmission and low wear, extending the equipment's service life and meeting the overall industrial requirements for efficient, safe, and universal unwinding. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the unwinding device with a safety protection structure according to this utility model.

[0022] Figure 2 This is a schematic diagram of the first side view of the unwinding device with a safety protection structure according to the present invention.

[0023] Figure 3 This is a schematic diagram of the second side structure of the unwinding shaft device with a safety protection structure according to the present invention.

[0024] Numbering on the map:

[0025] 101. Unwinding machine chuck; 102. Right side of the machine chuck connecting shaft; 103. Left side of the machine chuck connecting shaft; 104. Chuck bearing seat; 105. Magnetic powder brake; 106. Unwinding clamp; 107. Slider; 1071. Linear guide rail; 108. Cylinder; 109. Unwinding cylinder connector; 110. Unwinding push plate; 111. Seat; 201. Unwinding rotating plate; 202. Unwinding lead screw; 203. Lead screw nut mounting seat; 204. Lead screw mounting seat; 205. Tilting shaft; 206. Tilting shaft bearing seat; 207. End cover; 208. Gear motor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-3 As shown, this utility model provides an unwinding shaft device with a safety protection structure, characterized in that it includes an unwinding rotating plate 201, a linear slide rail 1071, a slider 107, an unwinding clamp 106, a clamp assembly, a drive assembly, a safety protection assembly, and a PLC control unit.

[0028] This embodiment of the device is fully controlled by a PLC system and equipped with a geared motor 208. Connected to the unwinding lead screw 202, it drives the slider 107 on the linear slide rail 1071 and the unwinding mechanical chuck 101 on the slider 107 to move automatically in a left-right linear motion, adapting to the unwinding needs of raw materials of various widths. Simultaneously, the device is specifically designed for automatic alignment of the paper tube of the unwound raw material, employing a limiting structure driven by the cylinder 108. This structure effectively protects the paper tube from being pinched during operation, offering advantages of safety and ease of operation.

[0029] When the paper tube on the unwinding material is inserted into the unwinding mechanical chucks 101 on the left and right sides, the unwinding screw 202 connected to the left and right reduction motors 208 rotates, causing the slider 107 mounted on the screw nut mounting seat 203 to slide on the left and right linear slide rails 1071, thereby driving the unwinding mechanical chucks 101 on the left and right sides to move linearly closer to the left and right sides of the paper tube on the unwinding material. When the unwinding mechanical chucks 101 on the left and right sides move inward and clamp the paper tube on the unwinding material, the magnetic switch on the cylinder 108 senses that the chuck has clamped the paper tube. In order to prevent the paper tube from being damaged by moving further inward, the PLC controls the piston rod of the cylinder 108 to push out, causing the entire seat 111 to move outward. At the same time, the PLC controls the left and right reduction motors 208 to stop.

[0030] The linear slide rail 1071 is fixed to the unwinding rotating plate 201, the slider 107 is slidably assembled to the linear slide rail 1071, and the unwinding clamp 106 is fixed to the slider 107.

[0031] The chuck assembly includes an unwinding mechanical chuck 101, a right mechanical chuck connecting shaft 102, a left mechanical chuck connecting shaft 103, and a chuck bearing seat 104. The chuck bearing seat 104 is fixed to the unwinding clamp plate 106. The right and left mechanical chuck connecting shafts 102 and 103 respectively pass through the chuck bearing seat 104. The unwinding mechanical chuck 101 is fixed to the opposite ends of the two connecting shafts.

[0032] The unwinding mechanical chuck 101 is interconnected with the right mechanical chuck connecting shaft 102 and the left mechanical chuck connecting shaft 103. The right mechanical chuck connecting shaft 102 and the left mechanical chuck connecting shaft 103 are respectively mounted on the chuck bearing seat 104, which is mounted on the unwinding clamp plate 106. The magnetic powder brake 105 is respectively mounted on the right mechanical chuck connecting shaft 102 and the unwinding clamp plate 106, and can drive the right mechanical chuck connecting shaft 102 and the left mechanical chuck connecting shaft 103 connected to the unwinding mechanical chuck 101 to rotate synchronously. In addition, the nut seat of the left lead screw is mounted on the bottom of the unwinding push plate 110, not on the bottom of the seat 111, and the unwinding push plate 110 and the seat 111 are connected by a cylinder 108; the nut seat of the right lead screw is mounted on the bottom of the seat 111.

[0033] The drive assembly includes a geared motor 208, an unwinding lead screw 202, and a lead screw nut mounting base 203. The unwinding lead screw 202 is rotatably mounted between the lead screw nut mounting base 203 and the lead screw mounting base 204. The geared motor 208 is connected to the unwinding lead screw 202 in a transmission manner. The slider 107 is threadedly engaged with the unwinding lead screw 202. The geared motor 208 drives the unwinding lead screw 202 to drive the slider 107 to slide along the linear slide rail 1071.

[0034] The safety protection component includes a cylinder 108, an unwinding cylinder connector 109, an unwinding pusher plate 110, and a magnetic switch. The cylinder 108 is fixed to the unwinding clamping plate 106. The unwinding cylinder connector 109 connects the cylinder piston rod and the unwinding pusher plate 110. The magnetic switch is installed on the cylinder 108 and senses the paper tube clamping state of the unwinding mechanical chuck 101.

[0035] The PLC control unit is electrically connected to the geared motor 208, the cylinder 108 and the magnetic switch respectively. After the magnetic switch sends a clamping signal to the PLC control unit, the PLC controls the cylinder piston rod to extend and drive the unwinding pusher plate 110 to push the seat body backward, and controls the geared motor 208 to stop.

[0036] The paper tube from the unwound raw material is inserted between the unwinding mechanical chucks 101 on both sides. After the device is started, the reduction motors 208 on both sides drive the corresponding unwinding screws 202 to rotate, causing the sliders 107 mounted on the screw nut mounting seats 203 to slide along the linear slide rails 1071 on both sides. This, in turn, causes the unwinding mechanical chucks 101 on both sides to move closer to the left and right sides of the paper tube in a straight line. When the unwinding mechanical chucks 101 on both sides move inward and clamp the paper tube, the paper tube will generate a leftward reaction force on the unwinding mechanical chucks 101. This reaction force will cause the piston rod of the cylinder 108 to move slightly. After the magnetic switch on the cylinder 108 senses this movement, it will send a signal to the PLC system to inform that the chuck has clamped the paper tube. After receiving the signal, the PLC system will immediately control the piston rod of the cylinder 108 to extend in order to prevent the chuck from moving further inward and damaging the paper tube. This will push the seat 111 and the unwinding mechanical chuck 101 to move to the left by a certain stroke, limiting the chuck from moving further towards the paper tube. At the same time, the PLC system will control the reduction motors 208 on both sides to stop running, ensuring that the paper tube is not damaged due to over-clamping.

[0037] Through the coordinated operation of the PLC system and the mechanical structure, the unwinding process is automated and safe. It is not only easy to operate without complicated manual intervention, but also accurately protects the paper tube from being pinched, ensuring the stability of the unwinding operation and the integrity of the raw materials. It is suitable for unwinding needs of various materials and specifications and is highly practical.

[0038] Furthermore, it also includes a magnetic powder brake 105, which is installed on the right mechanical chuck connecting shaft 102 and the unwinding clamp 106, and is connected to the right mechanical chuck connecting shaft 102 and the left mechanical chuck connecting shaft 103 to drive them to rotate synchronously.

[0039] Magnetic powder brakes 105 are installed on the right 102 of the mechanical chuck connecting shaft and the unwinding clamp 106, forming a transmission connection with the right 102 and left 103 of the mechanical chuck connecting shaft. After the device completes the paper tube clamping, the magnetic powder brake 105 is engaged. Through electromagnetic induction, it changes the magnetization state of the internal magnetic powder, generating a stable braking torque that is transmitted to the right 102 of the mechanical chuck connecting shaft. This torque then drives the left 103 of the mechanical chuck connecting shaft to rotate synchronously via the transmission structure. Since the unwinding mechanical chuck 101 is fixed to the opposite ends of the two connecting shafts, the synchronous rotation of the connecting shafts directly drives the unwinding mechanical chuck 101 to rotate coaxially with the paper tube, thus achieving uniform unwinding of the raw material. Simultaneously, the magnetic powder brake 105 can adjust its torque by regulating the input current to adapt to the unwinding tension requirements of different raw materials.

[0040] The magnetic powder brake 105 can be precisely adjusted via a PLC system or external controller to prevent raw materials from stretching and deforming due to excessive tension, or from becoming loose and stacked due to insufficient tension. It is especially suitable for tension-sensitive materials such as non-woven fabrics and films. Synchronous rotation ensures that the rotation speed is completely consistent, preventing the unwinding machine chuck 101 from rotating eccentrically, ensuring the coaxiality of the paper tube and raw materials during the unwinding process, and improving the product accuracy of subsequent processing (such as cutting and laminating).

[0041] Furthermore, it also includes a tilting shaft 205, a tilting shaft bearing seat 206, and a tilting shaft bearing seat 206 end cap 207 for fixing to the geared motor 208. The tilting shaft 205 is fixed to the bottom of the unwinding rotating plate 201. The tilting shaft bearing seat 206 is rotatably engaged with the tilting shaft 205 through a bearing. The tilting shaft bearing seat 206 end cap 207 is fixed to the end of the tilting shaft 205 and has a limiting engagement with the tilting shaft bearing seat 206.

[0042] The tilting shaft 205 is fixed to the bottom of the unwinding rotary plate 201. The tilting shaft bearing seat 206 forms a rotatable fit with the tilting shaft 205 through a bearing, providing a rotatable support base for the unwinding rotary plate 201. The end cap 207 of the tilting shaft bearing seat 206 is fixed to the end of the tilting shaft 205, forming a limiting fit with the tilting shaft bearing seat 206 to prevent axial movement of the tilting shaft 205 during rotation. The geared motor 208 is fixed to the end cap 207 and adjusts its angle synchronously with the rotation of the tilting shaft 205. During operation, the unwinding rotary plate 201 can be driven by external force to rotate around the tilting shaft 205 to a suitable angle according to the production line layout, raw material unwinding direction, and other requirements. The limiting structure of the end cap 207 and the bearing seat will lock this angle, ensuring that the unwinding rotary plate 201 remains stable during unwinding.

[0043] The unwinding rotary plate 201 can be flexibly adjusted in angle to adapt to the installation layout of different production lines and the operating requirements of different unwinding directions, improving the versatility and installation flexibility of the equipment. The limiting fit structure between the end cover 207 and the tilting shaft bearing seat 206 effectively restricts the axial displacement of the tilting shaft 205, preventing the unwinding rotary plate 201 from loosening or shifting due to vibration or force during the unwinding process, and ensuring the coordinated working accuracy of the chuck assembly and drive assembly.

[0044] Furthermore, the output shaft of the geared motor 208 is connected to the end of the unwinding screw 202, the unwinding screw 202 is arranged along the length of the unwinding rotating plate 201, and the linear slide rail 1071 is arranged parallel to the unwinding screw 202.

[0045] The output shaft of the geared motor 208 is directly connected to the end of the unwinding screw 202, allowing power to be directly transmitted to the unwinding screw 202 and reducing power loss. The unwinding screw 202 is arranged along the length of the unwinding rotating plate 201, and its extension direction covers the length range of various specifications of raw material paper tubes. The linear slide rail 1071 is arranged parallel to the unwinding screw 202, and the slider 107 is slidably mounted on the linear slide rail 1071 and threadedly engaged with the unwinding screw 202. During operation, after the geared motor 208 starts, the output shaft drives the unwinding screw 202 to rotate around its own axis. Through threaded engagement, the rotational motion is converted into linear motion of the slider 107 along the linear slide rail 1071, which in turn drives the unwinding clamping plate 106 and the chuck assembly to move synchronously, realizing the clamping adaptation of the chuck to paper tubes of different lengths.

[0046] Direct drive reduces power loss in intermediate links such as gear meshing and belt drives, improving energy utilization efficiency and enabling faster movement response of the chuck assembly. The unwinding screw 202 is arranged along the length of the unwinding rotary plate 201, and its length covers the length requirements of various paper tube specifications. Combined with the linear motion of the slider 107, it can adapt to unwinding of raw materials of different widths without requiring screw replacement or equipment structure adjustment. The parallel arrangement of the linear guide rail 1071 and the unwinding screw 202 ensures that the slider 107 always moves in a fixed direction during movement, preventing the chuck assembly from shifting or tilting, ensuring the alignment accuracy of the chuck with the paper tube, and reducing paper tube clamping eccentricity.

[0047] Furthermore, the unwinding mechanical chuck 101 is provided in two parts, which are symmetrically arranged on the right 102 and left 103 of the mechanical chuck connecting shaft, with the gripping ends of the two chucks facing each other to clamp the paper tube.

[0048] Two unwinding mechanical chucks 101 are provided, symmetrically arranged at the opposite ends of the right chuck connecting shaft 102 and the left chuck connecting shaft 103, with the gripping ends of the two chucks facing each other. When the drive assembly drives the slider 107 to translate, the two connecting shafts move synchronously with the unwinding clamp 106, causing the two unwinding mechanical chucks 101 to simultaneously move towards the center from the left and right sides of the paper tube. Due to the symmetrical arrangement of the chucks, the clamping forces of the two chucks on the paper tube are equal in magnitude and opposite in direction, ultimately forming a stable clamp at the axial position of the paper tube, ensuring that the paper tube is subjected to balanced forces.

[0049] The two clamps are positioned opposite each other, and their clamping force is symmetrically distributed along the axis of the paper tube. This prevents the paper tube from deforming or breaking due to excessive force on one side, and especially protects the integrity of paper tubes made of thin paper or fragile materials. The two clamps act simultaneously on both ends of the paper tube, effectively preventing slippage or displacement of the paper tube during unwinding, and ensuring the continuity and stability of the unwinding operation.

[0050] Furthermore, the magnetic switch is installed on the cylinder body, and the magnetic switch is connected to the signal input terminal of the PLC control unit via a wire. The signal output terminal of the PLC control unit is electrically connected to the geared motor 208 drive module and the cylinder solenoid valve, respectively.

[0051] The magnetic switch is connected to the signal input terminal of the PLC control unit via a wire. The signal output terminal of the PLC control unit is electrically connected to the drive module of the geared motor 208 and the solenoid valve of the cylinder, respectively. When the unwinding mechanical chuck 101 clamps the paper tube, the reaction force of the paper tube causes the piston rod to move slightly. After sensing this displacement, the magnetic switch immediately sends an electrical signal of "clamping in place" to the PLC control unit. After receiving the signal, the PLC control unit quickly sends a command to the solenoid valve of the cylinder to control the piston rod of the cylinder to extend; at the same time, it sends a stop command to the drive module of the geared motor 208 to stop the operation of the geared motor 208.

[0052] Furthermore, the linear slide rails 1071 are provided in two symmetrical arrangements on the unwinding rotating plate 201, and each linear slide rail 1071 is equipped with a corresponding slider 107. The bottom of the unwinding clamp 106 is fixedly connected to the two sliders 107.

[0053] Two linear guide rails 1071 are provided, symmetrically arranged on both sides of the unwinding rotary plate 201. Each linear guide rail 1071 is equipped with a corresponding slider 107. The bottom of the unwinding clamp 106 is fixedly connected to the two sliders 107. When the unwinding screw 202 drives the sliders 107 to move, the two sliders 107 slide synchronously along their respective linear guide rails 1071, jointly providing support and guidance for the unwinding clamp 106. Due to the symmetrical arrangement of the guide rails, the unwinding clamp 106 receives balanced support force, and there will be no tilting or jamming during movement, ensuring that the clamp assembly always maintains stable translation.

[0054] Furthermore, the unwinding screw 202 is rotatably engaged with the screw nut mounting base 203 and the screw mounting base 204 at both ends via bearings, and the unwinding screw 202 is threadedly engaged with the bottom nut sleeve of the slider 107.

[0055] The unwinding screw 202 has bearings at both ends that rotate with the screw nut mounting base 203 and the screw mounting base 204 respectively, providing low-friction support for the screw's rotation. The unwinding screw 202 engages with the nut sleeve at the bottom of the slider 107 via threads. When the geared motor 208 drives the screw to rotate, the meshing force between the threads converts the rotational motion into the linear motion of the slider 107. Due to the low-friction characteristics of the bearings, the screw rotates smoothly without jamming, and the high transmission efficiency of the threaded engagement ensures precise control of the slider 107's movement speed and displacement.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A reel unwinding device with a safety protection structure, characterized in that: It includes an unwinding rotary plate, linear guide rail, slider, unwinding clamp, chuck assembly, drive assembly, safety protection assembly and PLC control unit; The linear slide rail is fixed to the unwinding rotary plate, the slider is slidably mounted on the linear slide rail, and the unwinding clamp is fixed to the slider; The chuck assembly includes an unwinding mechanical chuck, a right mechanical chuck connecting shaft, a left mechanical chuck connecting shaft, and a chuck bearing seat. The chuck bearing seat is fixed to the unwinding clamp plate. The right and left mechanical chuck connecting shafts are respectively inserted into the chuck bearing seat. The unwinding mechanical chuck is fixed to the opposite ends of the two connecting shafts. The drive assembly includes a geared motor, an unwinding screw, and a screw nut mounting base. The unwinding screw is rotatably mounted between the screw nut mounting base and the screw mounting base. The geared motor is connected to the unwinding screw in a transmission manner. The slider is threadedly engaged with the unwinding screw. The geared motor drives the unwinding screw to move the slider along a linear slide rail. The safety protection component includes a cylinder, an unwinding cylinder connector, an unwinding push plate, and a magnetic switch. The cylinder is fixed to the unwinding clamping plate. The unwinding cylinder connector connects the cylinder piston rod to the unwinding push plate. The magnetic switch is installed on the cylinder and senses the paper tube clamping status of the unwinding mechanical chuck. The PLC control unit is electrically connected to the geared motor, cylinder, and magnetic switch. After the magnetic switch sends a clamping signal to the PLC control unit, the PLC controls the cylinder piston rod to extend, driving the unwinding pusher plate to push the seat body backward and controlling the geared motor to stop.

2. The unwinding device with a safety protection structure according to claim 1, characterized in that: It also includes a magnetic powder brake, which is installed on the right side of the mechanical chuck connecting shaft and the unwinding chuck, and is connected to the right side of the mechanical chuck connecting shaft and the left side of the mechanical chuck connecting shaft to drive them to rotate synchronously.

3. The unwinding device with a safety protection structure according to claim 1, characterized in that: It also includes a tilting shaft, a tilting shaft bearing housing, and a tilting shaft bearing housing end cover for fixing to a geared motor. The tilting shaft is fixed to the bottom of the unwinding rotating plate. The tilting shaft bearing housing is rotatably engaged with the tilting shaft through a bearing. The tilting shaft bearing housing end cover is fixed to the end of the tilting shaft and has a limiting engagement with the tilting shaft bearing housing.

4. The unwinding device with a safety protection structure according to claim 1, characterized in that: The output shaft of the geared motor is connected to the end of the unwinding screw, the unwinding screw is arranged along the length of the unwinding rotating plate, and the linear slide rail is arranged parallel to the unwinding screw.

5. The unwinding device with a safety protection structure according to claim 1, characterized in that: The unwinding mechanical chuck is provided in two parts, which are symmetrically arranged on the right and upper left of the mechanical chuck connecting shaft, with the gripping ends of the two chucks facing each other to clamp the paper tube.

6. The unwinding device with a safety protection structure according to claim 1, characterized in that: The magnetic switch is installed on the cylinder body and is connected to the signal input terminal of the PLC control unit via a wire. The signal output terminal of the PLC control unit is electrically connected to the geared motor drive module and the cylinder solenoid valve, respectively.

7. The unwinding device with a safety protection structure according to claim 1, characterized in that: The linear slide rails are provided in two symmetrical arrangement on the unwinding rotating plate, and each linear slide rail is equipped with a corresponding slider. The bottom of the unwinding clamp is fixedly connected to the two sliders.

8. The unwinding device with a safety protection structure according to claim 1, characterized in that: The unwinding screw is rotatably engaged with the screw nut mounting seat and the screw mounting seat at both ends by bearings, and the unwinding screw is threadedly engaged with the bottom nut of the slider.

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