Tension increasing and decreasing device and tensioner

Abstract

The utility model belongs to the technical field of metal sheet processing equipment, concretely relates to a tension increasing and reducing device and tensioning machine, including base, drive mechanism and roller subassembly, the output shaft of drive mechanism is sleeved with the movable claw, the vertical fixed with the portal frame on the base, the top side portion of portal frame is equipped with the cylinder, the piston rod of cylinder is hinged with the fork through pin shaft A, the fork is rotatably connected on the base through pin shaft B, two fork arms of fork are fixed with a gyro wheel needle bearing on opposite inner side wall respectively, the gyro wheel needle bearing is contained in the annular groove on movable claw outer circle, the movable claw and fork constitute the cooperation of relatively rotatable and along the output shaft axial sliding, the utility model has realized the quick switching of tensioning machine between the exciting mode and energy -conserving mode, has taken into account the thick plate tension stability and the thin plate production energy -conserving nature, has improved the flexibility and overall efficiency of production line.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal sheet processing equipment, specifically relating to a tension increasing / decreasing device and a tensioning machine. Background Technology

[0002] In the production and processing of color-coated steel sheets and other metal sheets, tensioners are key pieces of equipment, playing a crucial role in ensuring the stability of strip steel operation, improving processing quality, and optimizing coiling results. Tensioners precisely control the tension of the strip steel, adapting to the production needs of strip steel with different thicknesses, widths, and materials, ensuring the efficient operation of the production line. Currently, most tensioners on the market primarily use an electronic control system to adjust motor parameters, thereby controlling tension parameters to meet the production requirements of different strip steel specifications. For example, thinner strip steel requires less tension to avoid breakage, while thicker strip steel requires greater tension to ensure flatness. While this tension control method meets production needs to a certain extent, in areas of high-speed operation or sudden stress changes (such as the material storage section of the rear looper), it is difficult to meet the tension requirements of thick plates (≥1.2mm) by electrical control alone. This can easily lead to phenomena such as strip slippage and deviation. Even if the motor power is increased or the number of tensioners is increased (such as configuring two tensioners after the rear looper), the tension of thick plates can be improved. However, when producing thin plates (≤1.0mm), the redundancy of equipment will result in energy waste.

[0003] Existing technologies include research on improving and adjusting tension, such as patent CN201482801U - a jumping roller tension control device, which uses pneumatic or hydraulic jumping rollers to adjust tension steplessly through piston pressure difference. However, the response speed is slow and the structure is complex, making it difficult to adapt to high-speed production lines. Other examples include patents CN207016024U - a tension adjustment device for a winding machine and CN219928729U - a swing tensioning device for sheet metal processing, which use focused belts or rollers for mechanical tensioning. Although these can improve tension locally, they cannot achieve rapid start-stop switching of the drive unit, resulting in limited energy-saving effects.

[0004] In summary, existing tensioning machines cannot simultaneously achieve tension stability in thick plates and energy efficiency in thin plate production, nor can they quickly respond to changes in production demands, thus affecting the overall efficiency of the production line. Therefore, a new technical solution is needed to address these technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a tension increasing / decreasing device and a tensioning machine to solve the problems mentioned in the background art, such as the inability of current tensioning machines to simultaneously ensure the tension stability of thick plates and the energy efficiency of thin plate production, and the inability to quickly respond to changes in production demands, thereby affecting the overall efficiency of the production line.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tension increasing / decreasing device, comprising a base, a drive mechanism fixed on the base, and a roller assembly. An axially sliding movable claw is sleeved on the output shaft of the drive mechanism. A gantry bracket is vertically fixed on the base. A cylinder located above the drive mechanism is mounted on the top side of the gantry bracket. A shift fork is hinged to the piston rod of the cylinder via pin A. The shift fork is rotatably connected to the base via pin B. A roller needle bearing is fixed to the inner sidewall of each of the two fork arms of the shift fork. The roller needle bearing is accommodated in an annular groove on the outer circumference of the movable claw. The movable claw, through the annular groove and the roller needle bearing, forms a relative rotatable and axially sliding fit with the shift fork along the output shaft. The cylinder drives the shift fork to swing in a plane parallel to the output shaft axis with pin B as the fulcrum. The roller needle bearing and the annular groove drive the movable claw to engage or disengage with a fixed claw sleeved on the input shaft of the roller assembly.

[0007] Furthermore, the drive mechanism includes a motor and a reducer. The output end of the motor is connected to a coupling and is connected to the input end of the reducer through the coupling. The movable claw is axially slidably sleeved on the output shaft of the reducer. The motor and the reducer are fixed to the base in sequence along the transmission order. A support seat located behind the output side of the reducer is fixed on the base. The support seat is hinged to the shift fork through a pin B.

[0008] Furthermore, each side of the base is fixed with a connecting seat, and the two connecting seats are respectively fixedly connected to the bottom ends of the two longitudinal beams of the gantry support. The gantry support spans the reducer and its crossbeam is located above the reducer. A tailstock is fixed to the middle side of the crossbeam of the gantry support and is hinged to the tail end of the cylinder body through the tailstock and pin C. The cylinder is located above the reducer along the output direction of the reducer.

[0009] Furthermore, the fixed claw is disposed on the axial sliding path of the movable claw, and the movable claw engages or disengages with the fixed claw when it slides by swinging the shift fork driven by the cylinder; the end face of the movable claw facing the fixed claw is provided with annularly distributed meshing teeth, and the end face of the fixed claw facing the movable claw is provided with corresponding meshing teeth that cooperate with the meshing teeth; when the movable claw and the fixed claw engage through the meshing teeth on their end faces, the drive mechanism drives the movable claw to rotate and drives the fixed claw and roller assembly to rotate synchronously.

[0010] In addition to the above technical solutions, there are also tensioning machines equipped with this tension increasing / decreasing device.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves rapid switching between activation mode and energy-saving mode of the tensioning machine through the engagement and disengagement mechanism of the movable claw and the fixed claw. This allows the tensioning machine to simultaneously ensure the tension stability of thick plates and the energy efficiency of thin plate production. By adopting this combination of mechanical and electronic control, the tensioning machine can be precisely adjusted within a wide tension range, breaking through the limitations of traditional tensioning machines that rely solely on the electronic control system to adjust tension parameters. This meets the production needs of strip steel of different thicknesses, widths, and materials, ensuring stable operation of the strip steel in high-speed operation or areas of sudden stress changes. It avoids slippage and deviation caused by insufficient tension, thereby improving product quality and production efficiency. By optimizing the mechanical structure and control logic, the movable claw and the fixed claw are rapidly engaged and disengaged under the condition of slow and uniform rotation of the drive mechanism. This allows the tensioning machine to quickly respond to changes in production needs and switch tension modes without stopping or complex adjustments. This effectively improves the flexibility and overall efficiency of the production line, reduces production interruptions and efficiency losses caused by tension adjustment, and ensures the continuous and stable operation of the production line. 2. This utility model utilizes the annular groove and bearing to ensure no rotational interference when the movable claw slides axially. The cylinder drives the shift fork to engage the movable claw with the fixed claw, causing the roller assembly to generate higher tension under the drive mechanism, ensuring the stability of the tension of the thick plate. The cylinder drives the shift fork to disengage the movable claw from the fixed claw, disconnecting the power transmission path and putting the tensioner into energy-saving mode. While ensuring production needs, it effectively reduces energy consumption. Compared with the problem of excessive energy consumption in the production of thin plates by traditional tensioners, this device significantly reduces electricity consumption, reduces production costs, and conforms to the trend of green manufacturing and energy conservation and emission reduction. 3. This utility model, by designing the movable claw to be axially slidably fitted onto the output shaft of the reducer, achieves free movement of the movable claw on the reducer's output shaft, providing a foundation for subsequent engagement and disengagement actions. This effectively simplifies the drive structure of the movable claw, improves the accuracy and stability of its movement, and makes tension adjustment faster and more accurate. By rationally arranging the positions of the motor and reducer, and setting a support base and a hinged shift fork, a stable transmission system framework is formed, effectively enhancing the rigidity and stability of the entire transmission system, reducing vibration and noise caused by uneven force on transmission components, and improving the equipment's operational stability. The use of a gantry bracket structure with the crossbeam positioned above the reducer and fixedly connected to the base via a connecting seat forms a robust equipment support system, effectively improving the overall structural strength and stability of the equipment, facilitating installation and debugging. Simultaneously, the gantry bracket design also facilitates future expansion and upgrades of the equipment. 4. This utility model optimizes the cylinder layout and force distribution, reducing the extra load and energy loss caused by improper cylinder arrangement, improving the working efficiency and energy saving effect of the equipment. By precisely designing the position of the fixed claw, it is positioned on the axial sliding path of the movable claw, realizing the rapid engagement and disengagement of the movable claw and the fixed claw, effectively simplifying the tension adjustment operation process, improving the response speed and accuracy of tension adjustment, and enabling the equipment to adapt to changes in different production needs more quickly. 5. This utility model achieves precise docking and stable transmission of power by setting mutually cooperating meshing teeth on the end faces of the movable claw and the fixed claw, thereby improving the efficiency and stability of power transmission, reducing failures and downtime caused by slippage or loosening of transmission components, and enhancing the overall performance and reliability of the equipment. When the movable claw and the fixed claw mesh, the drive mechanism can simultaneously drive both and the roller assembly to rotate synchronously, realizing continuous tension adjustment and stable transmission, ensuring smooth operation and efficient work of the equipment during tension adjustment, and reducing product quality problems and production efficiency losses caused by tension fluctuations. 6. The tensioning machine of this utility model combines all the advantages of tension increasing and decreasing devices, and has the characteristics of wide-range tension control capability, significant energy saving effect, fast response speed, and precise and stable power transmission. It can meet the urgent needs of modern color-coated steel sheet production lines for high efficiency, energy saving and flexible adjustment, and improve the overall efficiency of the production line and product quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A structural diagram of the gantry crane (including cylinders, shift forks, movable claws, and fixed claws); Figure 3 for Figure 2 A schematic diagram of the side structure; Figure 4 for Figure 2 A top-view structural diagram; Figure 5 This is a schematic diagram of the end face structure of the movable claw and the fixed claw of this utility model.

[0013] The components are as follows: 1. Base; 2. Motor; 3. Reducer; 301. Output shaft; 4. Roller assembly; 401. Input shaft; 5. Coupling; 6. Movable claw; 601. Annular groove; 7. Gantry bracket; 8. Cylinder; 9. Tailstock; 10. Connecting seat; 11. Shift fork; 12. Pin A; 13. Pin B; 14. Pin C; 15. Support seat; 16. Roller needle bearing; 17. Fixed claw. Detailed Implementation

[0014] The following embodiments are used to further illustrate the content of this utility model, and do not limit the application of this utility model. Example 1:

[0015] Please see Figures 1-5 This embodiment provides a tension increasing / decreasing device, including a base 1, a motor 2 and a reducer 3 fixed sequentially on the base 1 along the transmission sequence, and a roller assembly 4. The output end of the motor 2 is connected to a coupling 5 and is connected to the input end of the reducer 3 through the coupling 5. An axially sliding movable claw 6 is sleeved on the output shaft 301 of the reducer 3. A gantry bracket 7 is vertically fixed on the base 1. A cylinder 8 is installed on the top side of the gantry bracket 7, located above the reducer 3 and along the output direction of the reducer. The tail end of the cylinder body of the cylinder 8 is hinged to a tail seat 9 through a pin C14. The tail seat 9 is fixed to the middle side of the crossbeam of the gantry bracket 7. A connecting seat 10 is fixed to the bottom end of each of the two longitudinal beams of the gantry bracket 7, and the two connecting seats 10 are respectively fixed to the two sides of the base 1. The gantry bracket 7 spans the reducer 3 and its crossbeam is located above the reducer 3. The piston rod of the cylinder 8 is hinged to a shift fork 11 through a pin A12. The shift fork 11 is hinged to a support seat 15 through a pin B13. The support seat 15 is fixed to the base 1 located behind the output side of the reducer 3, so that the shift fork 11 is rotatably connected relative to the base 1. Each of the two fork arms of the shift fork 11 has a roller needle bearing 16 fixed on its inner sidewall. The roller needle bearing 16 is accommodated in an annular groove 601 on the outer circumference of the movable pawl 6. The movable pawl 6 and the shift fork 11 are in a relative rotational and sliding fit along the output shaft 301 of the reducer 3 through the annular groove 601 and the roller needle bearing 16. The cylinder 8 drives the shift fork 11 to swing in a plane parallel to the axis of the output shaft 301 with the pin B13 as the fulcrum. The movable pawl 6 is engaged or disengaged from the fixed pawl 17 through the roller needle bearing 16 and the annular groove 601. The fixed claw 17 is sleeved on the input shaft 401 of the roller assembly 4 and is simultaneously located on the axial sliding path of the movable claw 6. The end face of the movable claw 6 facing the fixed claw 17 is provided with annularly distributed meshing teeth, and the end face of the fixed claw 17 facing the movable claw 6 is provided with corresponding meshing teeth that cooperate with the meshing teeth. When the movable claw 6 and the fixed claw 17 engage through the meshing teeth on their end faces, the motor 2 and the reducer 3 drive the movable claw 6 to rotate and drive the fixed claw 17 and the roller assembly 4 to rotate synchronously.

[0016] The working principle and usage process of this utility model are as follows: Figures 1-5As shown, after the tension adjustment device is assembled, the operator installs the entire device onto the tensioning machine (the functions and structures of conventional equipment such as tensioning machines are well known in the field, and the connection settings are also common knowledge, so they will not be described in detail here, nor are they shown in the attached drawings). The purpose is to enable the tensioning machine to quickly switch between the excitation mode and the energy-saving mode, so that the tensioning machine can simultaneously take into account the tension stability of thick plates and the energy saving of thin plate production, thereby improving the flexibility and overall efficiency of the production line, reducing production interruptions and efficiency losses caused by tension adjustment, and ensuring the continuous and stable operation of the production line.

[0017] When processing thick plates, the operator starts motor 2 by operating the control box or controller (the functions and structures of conventional equipment such as control boxes or controllers are well known in the art, and the connection settings are also common knowledge, so they will not be described in detail here, nor are they shown in the attached drawings). At this time, the reducer 3 will drive the output shaft 301 and the movable claw 6 to rotate slowly and uniformly under the rotation of the coupling 5 driven by motor 2. At the same time, the control box or controller will control the cylinder 8 to extend the piston rod, driving the shift fork 11 to swing towards the roller assembly 4, utilizing the roller needle bearing 16 and the annular... The groove 601 engages with the movable claw 6, causing it to slide axially along the output shaft 301 of the reducer 3. This allows the movable claw 6 to engage with the fixed claw 17 through the meshing teeth on their end faces. At this time, the roller assembly 4 will rotate synchronously with the fixed claw 17 as the movable claw 6 rotates. In other words, the roller assembly 4 will receive driving force from the motor 2 and the reducer 3, thus putting the tensioner in the activation mode. This ensures the stable operation of the thick plate in high-speed operation or areas of sudden force change, avoiding slippage and offset problems caused by insufficient tension, and improving product quality and production efficiency. When thin plates need to be processed, the operator shuts off motor 2 by operating the control box or controller, so that the output shaft 301 of the reducer 3 stops driving the movable claw 6 to rotate. At the same time, the control box or controller controls the cylinder 8 to retract the piston rod, driving the shift fork 11 to swing towards motor 2. Utilizing the cooperation of the roller needle bearing 16 and the annular groove 601, the movable claw 6 is driven to slide in the opposite direction along the output shaft 301, so that the movable claw 6 disengages from the fixed claw 17 through the meshing teeth on its end face. At this time, the roller assembly 4 will still rotate with the steel belt, but will not receive driving force from motor 2 and reducer 3, which protects motor 2 and puts the tensioner in energy-saving mode. Example 2:

[0018] Please see Figures 1-5 As another objective of this utility model, a tensioning machine is provided, which is equipped with the above-mentioned tension increasing and decreasing device. Therefore, the tensioning machine can obtain any of the beneficial effects of the tension increasing and decreasing device described above, which will not be repeated here.

Claims

1. A tension increasing / decreasing device, comprising a base, a drive mechanism fixed to the base, and a roller assembly, characterized in that, The output shaft of the drive mechanism is fitted with an axially sliding movable claw. A gantry bracket is vertically fixed on the base. A cylinder located above the drive mechanism is installed on the top side of the gantry bracket. The piston rod of the cylinder is hinged to a shift fork via pin A. The shift fork is rotatably connected to the base via pin B. Each of the two fork arms of the shift fork has a roller needle bearing fixed on its inner sidewall. The roller needle bearing is accommodated in an annular groove on the outer circumference of the movable claw. The movable claw and the shift fork are fitted together by the annular groove and the roller needle bearing, forming a relative rotatable fit that slides along the output shaft axis. The cylinder drives the shift fork to swing in a plane parallel to the output shaft axis with pin B as the fulcrum. The roller needle bearing and the annular groove drive the movable claw to engage or disengage with the fixed claw fitted on the input shaft of the roller assembly.

2. The tension increasing / decreasing device according to claim 1, characterized in that, The drive mechanism includes a motor and a reducer. The output end of the motor is connected to a coupling and is connected to the input end of the reducer through the coupling.

3. The tension increasing / decreasing device according to claim 2, characterized in that, The movable claw can be axially slidably sleeved on the output shaft of the reducer.

4. The tension increasing / decreasing device according to claim 2, characterized in that, The motor and reducer are fixed to the base in sequence along the transmission order. A support seat located behind the output side of the reducer is fixed on the base. The support seat is hinged to the shift fork via pin B.

5. The tension increasing / decreasing device according to claim 4, characterized in that, A connecting seat is fixed on each side of the base and is fixedly connected to the bottom ends of the two longitudinal beams of the gantry bracket through the two connecting seats respectively. The gantry bracket spans the reducer and its crossbeam is located above the reducer.

6. The tension increasing / decreasing device according to claim 5, characterized in that, The gantry support has a tailstock fixed to the middle side of the crossbeam and is hinged to the cylinder body tail end through the tailstock and pin C. The cylinder is located above the reducer along the output direction of the reducer.

7. The tension increasing / decreasing device according to claim 1, characterized in that, The fixed claw is positioned on the axial sliding path of the movable claw, and the movable claw engages with or disengages from the fixed claw when it slides by the swinging of the shift fork driven by the cylinder.

8. A tension increasing / decreasing device according to claim 7, characterized in that, The movable claw has annularly distributed meshing teeth on its end face facing the fixed claw, and the fixed claw has corresponding meshing teeth that cooperate with the meshing teeth on its end face facing the movable claw.

9. A tension increasing / decreasing device according to claim 8, characterized in that, When the movable claw and the fixed claw engage through the meshing teeth on their end faces, the drive mechanism drives the movable claw to rotate and causes the fixed claw and roller assembly to rotate synchronously.

10. A tensioning machine, characterized in that, Includes the tension increasing / decreasing device as described in any one of claims 1-9.

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