Automatic take-up tensioner with overload protection

Abstract

The application relates to the technical field of automatic winding tensioners, in particular to an automatic winding tensioner with overload protection, which comprises a main body frame, a power driving assembly, a tension detection module, a mechanical overload tripping mechanism and a braid winding assembly. The tension detection module is used for monitoring the braid tension change in real time, and the mechanical overload tripping mechanism is triggered to cut off the power transmission when the tension is out of limit; meanwhile, the braid winding assembly adopts a deviation prevention plate matched with a guide wheel to prevent the braid from deviating or winding. The application can effectively avoid the damage of the equipment due to overload, improve the safety and reliability, and meet the complex working condition requirements.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical automation and safety protection technology, specifically an automatic winding tensioner with overload protection. Background Technology

[0002] In the field of metal processing, clamping devices are key equipment to ensure the stability and positioning accuracy of workpieces during machining. However, existing clamping devices still have shortcomings in adapting to metal materials of different shapes and sizes, improving clamping efficiency, and reducing operational complexity, which limits their application in high-efficiency machining.

[0003] A search revealed a machining clamping tool with publication number CN103182677B, published on April 22, 2015. This patent achieves simultaneous clamping and machining of multiple rod-shaped workpieces through the cooperation of first and second clamping blocks and first and second limiting blocks. However, this technical solution's clamping device is primarily designed for rod-shaped workpieces and has poor adaptability to irregular or non-standard metal materials, making it difficult to meet diverse machining needs. Furthermore, its clamping structure relies on a locking method, which may increase operation time and complexity, resulting in low efficiency, especially when frequent workpiece changes are required.

[0004] A search revealed a workpiece clamping device and system, publication number CN107971926B, published on February 2, 2024. This patent, through the combination of a clamping unit and a drive unit, can adjust the clamping position and improve the yield and versatility of the processed parts. However, in this technical solution, the clamping device's fixation of the workpiece mainly relies on external clamping force, which may lead to workpiece deformation when the clamping force is too large, or decreased positioning accuracy when the clamping force is insufficient. Furthermore, the drive unit structure of this device is relatively complex, increasing equipment manufacturing costs and maintenance difficulty, and its clamping effect on miniaturized metal materials is limited.

[0005] The aforementioned problems indicate that existing clamping devices still have certain shortcomings in adapting to diverse metal materials, improving clamping efficiency, and simplifying the operating structure. Therefore, this invention provides a novel automatic winding tensioner with overload protection, aiming to enhance adaptability to metal materials of different shapes and sizes, simplify the clamping operation process, and optimize the distribution of clamping force, thereby improving processing efficiency and stability and meeting the needs of modern metal processing for efficient and precise clamping devices. Utility Model Content

[0006] This utility model relates to an automatic winding tensioner with overload protection, comprising a main frame, a power drive assembly, a tension detection module, a mechanical overload release mechanism, and a webbing winding assembly. The power drive assembly is installed within the main frame, the tension detection module is located on one side of the main frame, and the mechanical overload release mechanism is installed on the other side of the main frame. The webbing winding assembly is connected to the power drive assembly via a drive shaft.

[0007] The power drive assembly includes a servo motor, a reduction gear set, a drive shaft, and a limiting plate. The servo motor is fixedly installed on the bottom inner wall of the main frame. The top of the output shaft of the servo motor is fixedly connected to the reduction gear set. The output end of the reduction gear set is meshed with one end of the drive shaft. The other end of the drive shaft is rotatably connected to the side wall of the main frame through a bearing. Limiting plates are symmetrically fixed on the outer wall of the drive shaft, and the limiting plates are located between the two inner walls of the main frame.

[0008] The tension detection module includes a pressure sensor, a sliding guide rail, a slider, and an elastic element. The sliding guide rail is fixedly installed on one outer wall of the main frame. A slider is slidably connected to the inner wall of the sliding guide rail. A pressure sensor is fixed to one outer wall of the slider, and an elastic element is fixed to the other outer wall of the slider. One end of the elastic element is fixed to the inner wall of the sliding guide rail. The webbing passes through one side of the slider, and changes in the tension of the webbing will push the slider to move along the sliding guide rail, thereby triggering the signal output of the pressure sensor.

[0009] The mechanical overload release mechanism includes a release pin, a spring, a positioning groove, and a reset button. One end of the release pin is slidably connected to the side wall of the main frame, and the other end is embedded in the positioning groove on the outer wall of the drive shaft. A spring is sleeved on the outer wall of the middle part of the release pin, with one end fixed to the outer wall of the release pin and the other end fixed to the side wall of the main frame. A reset button is installed on the outer wall of the main frame, with one end of the reset button in contact with the outer wall of the release pin. When the webbing tension exceeds a set threshold, the pressure sensor outputs a signal to the control unit, which drives the servo motor to stop operating. Simultaneously, the spring pushes the release pin out of the positioning groove, cutting off the power transmission of the drive shaft.

[0010] The webbing take-up assembly includes a spool, guide wheels, and anti-deviation plates. One end of the spool is rotatably connected to the side wall of the main frame via a bearing, and the other end of the spool is connected to one end of a drive shaft via a coupling. Anti-deviation plates are evenly distributed on the outer wall of the spool, and guide grooves are formed on the outer wall of the anti-deviation plates. The guide wheels are mounted on the inner wall of the main frame via brackets, and the outer wall of the guide wheels is slidably connected to the guide grooves. One end of the webbing is fixed to the outer wall of the spool, and the other end passes through the guide wheel and extends to the outside of the main frame.

[0011] The main frame has a tape inlet on one side and a tape outlet on the other side, with the tape outlet located above the tape inlet. Support rods are symmetrically fixed to the outer wall of the main frame, with a control panel mounted on one end of each support rod. Adjustment knobs and a display screen are distributed on one side of the outer wall of the control panel.

[0012] The elastic element is a compression spring, and there are two elastic elements, symmetrically installed on both sides of the slider. A U-shaped groove is formed on the outer wall of the slider, and the webbing passes through the U-shaped groove. The tension change of the webbing will push the slider to move along the sliding guide rail, thereby changing the force state of the pressure sensor.

[0013] The number of anti-deviation plates is four, and the anti-deviation plates are evenly distributed on the outer wall of the roll. The outer wall of the anti-deviation plate is provided with an arc-shaped guide groove. The outer wall of the guide wheel is slidably connected to the arc-shaped guide groove to prevent the webbing from deviating or tangling during the winding process.

[0014] This invention combines a tension detection module and a mechanical overload release mechanism to monitor tension changes in real time during webbing winding and automatically cut off power transmission when the tension exceeds a set threshold, preventing equipment damage due to overload. The tension detection module, through the cooperation of a slider and an elastic element, converts changes in webbing tension into a signal output from a pressure sensor, thus achieving accurate tension detection. The mechanical overload release mechanism, through the cooperation of a spring and a release pin, automatically disengages from the power transmission path of the drive shaft when the tension is too high, ensuring safe operation of the equipment. Furthermore, the webbing winding assembly, through the cooperation of an anti-deviation plate and guide wheels, effectively prevents the webbing from shifting or tangling during winding, improving the stability and reliability of the equipment.

[0015] This utility model solves the problem of equipment damage caused by the lack of overload protection mechanism in the prior art through the above-mentioned technical means, improves the safety and durability of automatic winding tensioner under high load conditions, and meets the usage needs in complex environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle.

[0018] Figure 3 for Figure 2 A magnified diagram of region A.

[0019] Figure 4 This is a schematic diagram of the outer structure of the sliding guide rail of this utility model.

[0020] The attached diagram is labeled as follows: 1. Main frame; 2. Servo motor; 3. Reduction gear set; 4. Drive shaft; 5. Limiting plate; 6. Pressure sensor; 7. Sliding guide rail; 8. Slider; 9. Elastic element; 10. Tripping pin; 11. Spring; 12. Positioning groove; 13. Reset button; 14. Reel; 15. Guide wheel; 16. Anti-deviation plate; 17. Belt inlet; 18. Belt outlet; 19. Control panel. Detailed Implementation

[0021] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Specific implementation examples are given below.

[0023] The specific embodiments of this utility model will be described in detail with reference to the accompanying drawings, wherein... Figure 1 This is a schematic diagram of the overall structure, showing the layout relationship of the main frame 1, the power drive component, the tension detection module, the mechanical overload release mechanism, and the webbing winding component; Figure 2 This is a partial enlarged view of the tension detection module, showing the connection method of the pressure sensor 6, sliding guide rail 7, slider 8 and elastic element 9, as well as the webbing threading path; Figure 3 This is a partial sectional view of a mechanical overload release mechanism, which focuses on the structural arrangement of the release pin 10, spring 11, positioning groove 12 and reset button 13 and their cooperation with the drive shaft 4. Figure 4 This is a schematic diagram of the webbing winding assembly, showing the installation positions of the spool 14, guide wheel 15, anti-deviation plate 16, and webbing, as well as the distribution of the guide grooves.

[0024] The main frame 1 serves as the supporting structure for the entire device, and multiple functional modules are installed both internally and externally. A servo motor 2 is fixedly mounted on the inner wall of the bottom end of the main frame 1. The top end of the output shaft of the servo motor 2 is bolted or keyed to one end of a reduction gear set 3. The other end of the reduction gear set 3 is meshed with one end of a drive shaft 4. The other end of the drive shaft 4 is rotatably connected to the side wall of the main frame 1 via a bearing. Limiting discs 5 are symmetrically fixed to the outer wall of the drive shaft 4, located between the inner walls of both sides of the main frame 1, to restrict the axial movement of the drive shaft 4. The servo motor 2 transmits power to the drive shaft 4 through the reduction gear set 3, thereby achieving stable power output.

[0025] The tension detection module is mounted on one outer wall of the main frame 1 and includes a pressure sensor 6, a sliding guide rail 7, a slider 8, and an elastic element 9. The sliding guide rail 7 is fixedly installed on one outer wall of the main frame 1. A groove is formed on the inner wall of the sliding guide rail 7, through which the slider 8 is slidably connected to the sliding guide rail 7. The pressure sensor 6 is fixed to one outer wall of the slider 8 by screws, and one end of the elastic element 9 is fixed to the other outer wall of the slider 8 by screws. The other end of the elastic element 9 is fixed to the inner wall of the sliding guide rail 7 by screws. A U-shaped groove is formed on the outer wall of the slider 8, through which a webbing passes. Changes in the tension of the webbing push the slider 8 along the sliding guide rail 7, thereby changing the force state of the pressure sensor 6. Two compression springs are 9, symmetrically installed on both sides of the slider 8, to provide a restoring force, ensuring that the slider 8 returns to its initial position when no external force is applied.

[0026] A mechanical overload tripping mechanism is located on the other side of the main frame 1, including a tripping pin 10, a spring 11, a positioning groove 12, and a reset button 13. One end of the tripping pin 10 is slidably mounted on the side wall of the main frame 1, and the other end of the tripping pin 10 is embedded in the positioning groove 12 on the outer wall of the drive shaft 4. A spring 11 is sleeved on the outer wall of the middle part of the tripping pin 10. One end of the spring 11 is fixed to the outer wall of the tripping pin 10 by welding or snap-fitting, and the other end of the spring 11 is fixed to the side wall of the main frame 1 by welding or snap-fitting. A reset button 13 is installed on the outer wall of the main frame 1 by screws. One end of the reset button 13 contacts the outer wall of the tripping pin 10. Pressing the reset button 13 allows the tripping pin 10 to re-embed in the positioning groove 12, restoring the power transmission path of the drive shaft 4. When the tension of the webbing exceeds the set threshold, the pressure sensor 6 outputs a signal to the control unit, which drives the servo motor 2 to stop running. At the same time, the spring 11 pushes the release pin 10 to disengage from the positioning groove 12, cutting off the power transmission path of the drive shaft 4.

[0027] The webbing take-up assembly is located inside the main frame 1 and includes a spool 14, guide wheels 15, and anti-deviation plates 16. One end of the spool 14 is rotatably connected to the side wall of the main frame 1 via a bearing, and the other end of the spool 14 is connected to one end of a drive shaft 4 via a coupling. The power from the drive shaft 4 is transmitted to the spool 14 via the coupling, causing the spool 14 to rotate. Four anti-deviation plates 16 are evenly distributed on the outer wall of the spool 14. The outer wall of the anti-deviation plates 16 has an arc-shaped guide groove. The guide wheels 15 are mounted on the inner wall of the main frame 1 via brackets, and the outer wall of the guide wheels 15 is slidably connected to the arc-shaped guide grooves to prevent the webbing from shifting or tangling during the take-up process. One end of the webbing is fixed to the outer wall of the spool 14 with screws, and the other end passes through the guide wheels 15 and extends to the outside of the main frame 1.

[0028] The main frame 1 has a tape inlet 17 on one side and a tape outlet 18 on the other side. The tape outlet 18 is located above the tape inlet 17. The webbing enters the main frame 1 through the tape inlet 17, passes through the tension detection module, goes around the guide wheel 15, and is fixed to the spool 14. Finally, it extends from the tape outlet 18 to the outside of the main frame 1. Support rods are symmetrically fixed to the outer wall of the main frame 1. A control panel 19 is installed at one end of the support rod by screws. Adjustment knobs and a display screen are distributed on one side of the outer wall of the control panel 19 for adjusting and displaying the set value and real-time value of the webbing tension.

[0029] In operation, the webbing is first introduced into the main frame 1 through the inlet 17. After passing through the U-shaped groove of the slider 8, the webbing goes around the guide wheel 15 and is fixed to the reel 14. Then, it extends from the outlet 18 to the outside of the main frame 1. The servo motor 2 is started, and the servo motor 2 transmits power to the drive shaft 4 through the reduction gear set 3. The drive shaft 4 drives the reel 14 to rotate, realizing the automatic winding of the webbing. During the winding process, the tension change of the webbing will push the slider 8 to move along the sliding guide rail 7, thereby changing the force state of the pressure sensor 6. The pressure sensor 6 converts the force state into an electrical signal and transmits it to the control unit on the control panel 19. When the webbing tension exceeds the set threshold, the control unit drives the servo motor 2 to stop running. At the same time, the spring 11 pushes the release pin 10 to disengage from the positioning groove 12, cutting off the power transmission path of the drive shaft 4 and preventing the equipment from being damaged due to overload. After pressing the reset button 13, the release pin 10 is re-embedded in the positioning groove 12, restoring the power transmission path of the drive shaft 4, and the webbing winding operation continues.

[0030] The anti-deviation plate 16 in the webbing take-up assembly works in conjunction with the guide wheel 15 to ensure that the webbing remains centered on the reel 14 during the take-up process, preventing the webbing from shifting or tangling. The outer wall of the guide wheel 15 slides in connection with the arc-shaped guide groove of the anti-deviation plate 16, further improving the stability of the webbing take-up. The adjustment knob on the control panel 19 can be used to adjust the set value of the webbing tension, and the display screen shows the value of the webbing tension in real time, making it easy for operators to monitor and adjust the operating status of the equipment.

[0031] This invention, through the aforementioned structural design, achieves real-time tension monitoring and overload protection during the webbing winding process. It solves the problem of equipment damage caused by the lack of overload protection mechanisms in existing technologies, improves the safety and durability of the automatic winding tensioner under high-load conditions, and meets the needs of use in complex environments. To better enable those skilled in the art to fully understand and implement this invention, the specific implementation principle is further explained below with reference to a specific application scenario.

[0032] Firstly, in logistics and transportation scenarios, the automatic rewind tensioner is used for the rewinding of webbing to secure goods. After the webbing is introduced into the main frame 1 through the inlet 17, it passes through the U-shaped groove of the slider 8, goes around the guide wheel 15, and is finally fixed to the reel 14. The webbing then extends outward from the outlet 18 to connect with the goods. When the servo motor 2 is started, it transmits power to the drive shaft 4 through the reduction gear set 3. The drive shaft 4 drives the reel 14 to rotate, thus achieving automatic rewinding of the webbing. During this process, changes in webbing tension push the slider 8 along the sliding guide rail 7, altering the force state of the pressure sensor 6. The pressure sensor 6 converts the force state into an electrical signal and transmits it to the control unit on the control panel 19. When the webbing tension exceeds a set threshold, the control unit drives the servo motor 2 to stop, and simultaneously, the spring 11 pushes the release pin 10 out of the positioning groove 12, cutting off the power transmission path of the drive shaft 4 and preventing damage to the equipment due to overload.

[0033] Secondly, during the webbing winding process, the anti-deviation plate 16 and the guide wheel 15 cooperate to ensure that the webbing always remains in the center position of the roll 14. Specifically, four anti-deviation plates 16 evenly distributed on the outer wall of the roll 14 have arc-shaped guide grooves, and the guide wheel 15 is mounted on the inner wall of the main frame 1 through a bracket, with its outer wall slidably connected to the arc-shaped guide groove. This structural design effectively prevents the webbing from shifting or tangling during the winding process, further improving the stability of the webbing winding. In addition, the operator can adjust the set value of the webbing tension through the adjustment knob on the control panel 19, and the display screen shows the value of the webbing tension in real time, which is convenient for monitoring and adjusting the equipment operating status.

[0034] Next, once the webbing tension returns to normal, press the reset button 13. One end of the reset button 13 contacts the outer wall of the release pin 10, pushing the release pin 10 back into the positioning groove 12 on the outer wall of the drive shaft 4, restoring the power transmission path of the drive shaft 4. At this time, the servo motor 2 restarts and continues the webbing winding operation. This process ensures that the equipment can quickly return to normal operation after the overload protection is triggered, improving the ease of operation and work efficiency of the equipment.

[0035] Finally, in complex environments, such as high-load conditions or webbing jamming, the mechanical overload release mechanism plays a crucial role. When the webbing tension exceeds the set threshold, the pressure sensor 6 outputs a signal to the control unit, which drives the servo motor 2 to stop operating. Simultaneously, the spring 11 pushes the release pin 10 out of the positioning groove 12, cutting off the power transmission path of the drive shaft 4. This design effectively avoids problems such as gear damage, reel jamming, or motor burnout caused by overload, significantly improving the safety and durability of the equipment.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic winding tensioner with overload protection, characterized in that, It includes a main frame (1), a power drive assembly, a tension detection module, a mechanical overload release mechanism, and a webbing winding assembly. The power drive assembly is installed inside the main frame (1). A tension detection module is provided on one side of the main frame (1). A mechanical overload release mechanism is installed on the other side of the main frame (1). The webbing winding assembly is connected to the power drive assembly through a transmission shaft (4).

2. The automatic winding tensioner with overload protection according to claim 1, characterized in that, The power drive assembly includes a servo motor (2), a reduction gear set (3), a transmission shaft (4), and a limiting plate (5). The servo motor (2) is fixedly installed on the bottom inner wall of the main frame (1). The top of the output shaft of the servo motor (2) is fixedly connected to the reduction gear set (3). The output end of the reduction gear set (3) is meshed with one end of the transmission shaft (4). The other end of the transmission shaft (4) is rotatably connected to the side wall of the main frame (1) through a bearing. The limiting plate (5) is symmetrically fixed on the outer wall of the transmission shaft (4), and the limiting plate (5) is located between the two inner walls of the main frame (1).

3. The automatic winding tensioner with overload protection according to claim 1, characterized in that, The tension detection module includes a pressure sensor (6), a sliding guide rail (7), a slider (8), and an elastic element (9). The sliding guide rail (7) is fixedly installed on one side of the outer wall of the main frame (1). The slider (8) is slidably connected to the inner wall of the sliding guide rail (7). The pressure sensor (6) is fixedly connected to one side of the outer wall of the slider (8). The elastic element (9) is fixedly connected to the other side of the outer wall of the slider (8). One end of the elastic element (9) is fixedly connected to the inner wall of the sliding guide rail (7). A U-shaped groove is opened on the outer wall of the slider (8), and the webbing passes through the U-shaped groove.

4. The automatic winding tensioner with overload protection according to claim 1, characterized in that, The mechanical overload tripping mechanism includes a tripping pin (10), a spring (11), a positioning groove (12), and a reset button (13). One end of the tripping pin (10) is slidably connected to the side wall of the main frame (1), and the other end of the tripping pin (10) is embedded in the positioning groove (12) on the outer wall of the drive shaft (4). A spring (11) is sleeved on the outer wall of the middle part of the tripping pin (10). One end of the spring (11) is fixed to the outer wall of the tripping pin (10), and the other end of the spring (11) is fixed to the side wall of the main frame (1). A reset button (13) is installed on the outer wall of the main frame (1), and one end of the reset button (13) is in contact with the outer wall of the tripping pin (10).

5. An automatic winding tensioner with overload protection according to claim 1, characterized in that, The webbing winding assembly includes a spool (14), a guide wheel (15), and an anti-deviation plate (16). One end of the spool (14) is rotatably connected to the side wall of the main frame (1) via a bearing. The other end of the spool (14) is connected to one end of the drive shaft (4) via a coupling. Anti-deviation plates (16) are evenly distributed on the outer wall of the spool (14). An arc-shaped guide groove is provided on the outer wall of the anti-deviation plate (16). The guide wheel (15) is mounted on the inner wall of the main frame (1) via a bracket, and the outer wall of the guide wheel (15) is slidably connected to the arc-shaped guide groove.

6. An automatic winding tensioner with overload protection according to claim 1, characterized in that, The main frame (1) has an inlet (17) on one side and an outlet (18) on the other side, with the outlet (18) located above the inlet (17).

7. An automatic winding tensioner with overload protection according to claim 3, characterized in that, The elastic element (9) is a compression spring, and there are two elastic elements (9), which are symmetrically installed on both sides of the slider (8).

8. An automatic winding tensioner with overload protection according to claim 5, characterized in that, The number of anti-deviation plates (16) is four, and the anti-deviation plates (16) are evenly distributed on the outer wall of the scroll (14).

9. An automatic winding tensioner with overload protection according to claim 1, characterized in that, Support rods are symmetrically fixed to the outer wall of the main frame (1). A control panel (19) is installed at one end of the support rod. Adjustment knobs and a display screen are distributed on one side of the outer wall of the control panel (19).

10. An automatic winding tensioner with overload protection according to claim 1, characterized in that, One end of the webbing is fixed to the outer wall of the spool (14), and the other end extends through the guide wheel (15) to the outside of the main frame (1).

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