A plate shearing apparatus

Abstract

This utility model discloses a sheet metal shearing device, belonging to the field of sheet metal processing. A lifting drive component is connected to a transmission shaft, driving the transmission shaft to rotate. An eccentric assembly includes an eccentric wheel and a connecting rod. The eccentric wheel is fixed to the transmission shaft, and both ends of the connecting rod are connected to the eccentric wheel and a movable beam, respectively. The movable beam is slidably mounted on the frame. The upper blade holder of the blade holder assembly is rotatably mounted on the movable beam, and the lower blade holder is rotatably mounted on the frame, with the upper and lower blade holders slidably connected. A rotary drive component of the rotary drive structure is connected to the lower blade holder via a transmission component, driving the blade holder assembly to rotate relative to the frame. This application uses an eccentric wheel mounted on the transmission shaft to convert the rotation of the lifting drive component into linear motion, driving the upper blade holder to fall for shearing. This allows for precise adjustment of the upper blade holder's running speed, controlling the shearing speed, improving production line efficiency, or preventing excessively fast shearing, which could tear the steel sheet and affect the shearing quality.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal processing, and in particular to a sheet metal shearing device. Background Technology

[0002] There are two methods for forming regular-edge, multi-angle steel plates: stamping and shearing. Stamping uses a press with blanking dies. One die is used for cutting steel plates of a single angle shape, and multiple dies are needed for cutting steel plates of multiple angles and sizes. Considering the mold space and the maximum die size, the press table needs to be very large. Compared to shearing, which generally uses an inclined upper blade to significantly reduce shearing force, the stamping pressure of the blanking press is much greater than that of shearing, requiring a much larger pressure tonnage. The cost of the press and dies is very high. The advantage of blanking lies in forming curved edge plates.

[0003] Currently, shearing dies with rotatable blade holders have emerged. In conjunction with a feeding line, a single die can shear steel plates of various sizes and shapes. However, this is only suitable for production line upgrades equipped with presses or for users primarily producing curved-edge blanking with regular-edge multi-angle blanking as a secondary option. Both methods rely on the press providing power for the cutting. Considering the die-mounting space and press table size, the press's efficiency is not fully utilized. Furthermore, due to the limited number of press strokes, production efficiency is not very high. Pairing a press with shearing dies is costly and presents a mismatch between the press's electrical system and the shearing die's electrical system. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a method that does not use a press, but uses a transmission structure to drive the upper blade holder to fall for shearing, and the blade holder assembly can rotate to achieve shearing of various specifications of sheet metal.

[0005] One of the objectives of this utility model is achieved through the following technical solution:

[0006] A sheet metal shearing device includes a frame, a blade holder assembly, a lifting drive structure, a movable beam, and a rotary drive structure. The lifting drive structure includes a lifting drive component, a transmission shaft, and an eccentric assembly. The lifting drive component is driven by the transmission shaft and drives the transmission shaft to rotate. The eccentric assembly includes an eccentric wheel and a connecting rod. The eccentric wheel is fixed to the transmission shaft, and both ends of the connecting rod are connected to the eccentric wheel and the movable beam, respectively. The movable beam is slidably mounted on the frame. The blade holder assembly includes an upper blade holder and a lower blade holder. The upper blade holder is rotatably mounted on the movable beam, and the lower blade holder is rotatably mounted on the frame. The upper and lower blade holders are slidably connected. The rotary drive structure includes a rotary drive component and a transmission component. The rotary drive component is driven by the transmission component and drives the blade holder assembly to rotate relative to the frame.

[0007] Furthermore, the lifting drive component is a motor, the lifting drive component is fixed to the frame, the transmission shaft is rotatably mounted on the frame, and there are two eccentric components, which are respectively located on both sides of the tool holder assembly.

[0008] Furthermore, the eccentric assembly also includes a first bearing and a first rotating shaft. The first bearing is mounted on the eccentric wheel, and the first rotating shaft is mounted on the movable beam. The two ends of the connecting rod are respectively connected to the first bearing and the first rotating shaft.

[0009] Furthermore, the frame includes a base, a column, and a fixed beam. The column is fixed to the base, the lifting drive and the transmission shaft are mounted on the base, the fixed beam is fixed to the top of the column, and the movable beam is slidably mounted on the column. The sheet metal shearing equipment also includes a connecting assembly. The connecting assembly includes a first guide rod, a first elastic element, and a nut. The first guide rod is fixed to the movable beam and passes through the fixed beam. The nut is fixed to the end of the first guide rod, and the first elastic element is sleeved on the first guide rod. Both ends of the first elastic element abut against the nut and the fixed beam, respectively.

[0010] Furthermore, the upper tool holder includes an upper frame and a pressure plate, with the pressure plate floatingly mounted on the upper frame.

[0011] Furthermore, the upper tool holder also includes a second guide rod and a second elastic element. The second guide rod is fixed to the pressure plate and is installed on the upper frame body by a nut. The second elastic element is sleeved on the second guide rod and its two ends abut against the nut and the pressure plate, respectively.

[0012] Furthermore, the lower tool holder includes a lower frame body and a rotating wheel mounted on the lower frame body. The frame also includes a support base. The tool holder assembly is rotatably mounted on the support base. The support base is provided with a rolling track, and the rotating wheel is located on the rolling track.

[0013] Furthermore, the lower tool holder also includes a mounting base and a third elastic element. The mounting base is fixed to the lower frame body, and the two ends of the third elastic element abut against the mounting base and the rotating wheel, respectively.

[0014] Furthermore, the lower tool holder also includes a lower pressure block, which is fixed to the lower frame body. The support base includes a pressure plate, and the lower pressure block is in gap contact with the pressure plate.

[0015] Furthermore, the lower tool holder also includes a sliding seat, a stop block, and an adjusting screw. The contact surface between the sliding seat and the lower frame body is an inclined surface. The stop block is fixed to the sliding seat. The adjusting screw is threadedly connected to the stop block. Rotation of the adjusting screw causes the stop block to move the sliding seat relative to the lower frame body to adjust the blade gap.

[0016] Compared with existing technologies, the sheet metal shearing equipment of this invention has the following advantages:

[0017] (1) This application uses an eccentric wheel mounted on the drive shaft to convert the rotation of the lifting drive component into linear motion, which drives the upper blade holder to fall for shearing. This can precisely adjust the running speed of the upper blade holder, control the shearing speed, improve the efficiency of the production line, or prevent the shearing speed from being too fast, causing the steel plate to tear and affecting the shearing quality.

[0018] (2) The rotary drive unit drives the knife holder assembly to rotate relative to the frame through the transmission component. Adjusting the rotation angle and time of the rotary drive unit changes the feeding time and the angle between the knife holder assembly and the feeding line. By matching the speed of the rotary drive unit, the lifting drive unit and the feeding motor of the production line, the cutting of plates of different angles and lengths can be achieved, and the production cycle can be precisely controlled.

[0019] (3) The first elastic element is sleeved on the first guide rod. The two ends of the first elastic element are in contact with the nut and the fixed beam respectively, which balances the weight of the movable beam and the upper tool holder, reduces the moment of inertia of the movable beam, eliminates the gap between the connecting rod and the movable beam, and reduces the impact and wear of the stressed components.

[0020] (4) The rotating wheel at the bottom of the lower tool holder is equipped with a spring floating device so that when the lower tool holder is subjected to the downward force of the movable beam, the rotating wheel is not subjected to force, thus avoiding damage to the shaft of the rotating wheel due to excessive force.

[0021] (5) The second guide rod is fixed to the pressure plate and installed on the upper frame body by a nut. The second elastic element is sleeved on the second guide rod and the two ends of the second elastic element abut against the nut and the pressure plate respectively. Under the premise of satisfying the free rotation of the tool holder assembly, it avoids damage from excessive force during shearing, ensures that the downward force of the movable beam is transmitted through the upper and lower pressure blocks, and finally transmitted to the frame, so that the upper and lower intermediate shafts are not subjected to force or are subjected to small force, and at the same time, the size of the parts can be reduced.

[0022] (6) The contact surface between the sliding seat and the lower frame is an inclined surface. The stop block is fixed to the sliding seat. The adjusting screw is threadedly connected to the stop block. The adjustment screw rotates to make the stop block move the sliding seat relative to the lower frame to adjust the blade gap. The lower blade position is adjusted by the inclined surface to adjust the gap between the upper and lower blades to adapt to the purpose of shearing steel plates of different thicknesses. Attached Figure Description

[0023] Figure 1 This is the front view of the sheet metal shearing device of this utility model;

[0024] Figure 2 for Figure 1 A partial structural diagram of a sheet metal shearing device;

[0025] Figure 3 for Figure 2 Enlarged view of section A of the sheet metal shearing equipment;

[0026] Figure 4 for Figure 2 Enlarged view of section B of the sheet metal shearing equipment;

[0027] Figure 5 for Figure 1 A partial structural side view of the sheet metal shearing equipment;

[0028] Figure 6 for Figure 1 A top view of a partial structure of a sheet metal shearing device.

[0029] In the diagram: 10. Frame; 11. Base; 12. Column; 120. Guide rail; 13. Reinforcing beam; 14. Fixed beam; 15. Support seat; 150. Pressure plate; 151. Rolling track; 20. Lifting drive structure; 21. Lifting drive component; 22. Reduction assembly; 23. Drive shaft; 24. Eccentric assembly; 240. Eccentric wheel; 241. First bearing; 242. Connecting rod; 243. Grinding sleeve; 244. First rotating shaft; 30. Movable beam; 31. Main body; 32. Slider; 40. Brake; 50. Connecting assembly; 51. First guide rod; 52. First elastic element; 53. Nut; 60. Tool holder assembly; 61. Upper tool. Frame; 610, Upper frame body; 611, Connecting shaft; 612, Second guide rod; 613, Pressure plate; 614, Second elastic element; 62, Lower tool holder; 620, Lower frame body; 621, Lower bearing block; 622, Mounting seat; 623, Rotating wheel; 624, Third elastic element; 625, Sliding seat; 626, Stop block; 627, Adjusting screw; 63, Sliding structure; 631, Connecting guide rail; 632, Plate body; 70, Mounting assembly; 71, Bearing sleeve; 72, Second bearing; 80, Rotary drive structure; 81, Rotary drive component; 82, First transmission component; 83, Second transmission component; 84, Second rotating shaft; 85, Third bearing. Detailed Implementation

[0030] 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.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please see Figures 1 to 6 The sheet metal shearing equipment includes a frame 10, a lifting drive structure 20, a movable beam 30, a brake 40, a connecting assembly 50, a blade holder assembly 60, an installation assembly 70, and a rotary drive structure 80.

[0034] Please continue reading. Figure 1 The frame 10 includes a base 11, columns 12, reinforcing beams 13, fixed beams 14, and a support base 15. The base 11 is located on the equipment mounting surface and supports the lifting drive structure 20, the movable beam 30, the brake 40, the connecting assembly 50, the tool holder assembly 60, the mounting assembly 70, and the rotary drive structure 80. Four columns 12 are fixed to the base 11 and are perpendicular to it. Guide rails 120, which are linear guide rails, are provided on the columns 12. The slider 32 of the movable beam 30 is mounted on the guide rails 120. The linear guide rails restrict the X and Y axis degrees of freedom of the movable beam 30, retaining only the Z axis degree of freedom, while providing precise guidance for the movable beam 30. The reinforcing beam 13 is installed between the front and rear columns 12 to increase overall rigidity. The fixed beam 14 is fixed to the top of the columns 12 and supports the movable beam 30. The support base 15 is fixed to the base 11 and is located between the columns 12. The support base 15 is used to support the tool holder assembly 60. The support base 15 is provided with a pressure plate 150. The pressure plate 150 is in clearance fit with the pressure plate 613 of the lower tool holder 62 to reduce the friction of the lower tool holder 62 during rotation, and at the same time, it provides a certain auxiliary support for the lower tool holder 62 during rotation.

[0035] The lifting drive structure 20 includes a lifting drive component 21, a reduction assembly 22, a transmission shaft 23, and an eccentric assembly 24. The lifting drive component 21 is used to drive the upper tool holder 61 to lift and lower for shearing. Specifically, the lifting drive component 21 is fixed to the base 11. In this embodiment, the lifting drive component 21 is a servo motor. The lifting drive component 21 drives the transmission shaft 23 to rotate through the reduction assembly 22. The reduction assembly 22 includes a drum gear coupling and a planetary reducer. The lifting drive component 21 is connected to the planetary reducer through the drum gear coupling. The transmission shaft 23 has splines machined on it and is directly assembled with the planetary reducer. Through the speed reduction and torque increase effect of the compact high-speed ratio planetary reducer, the power of the servo motor is transmitted to the transmission shaft 23. The mounting bracket is fixed to the base 11 of the frame 10. The transmission shaft 23 is rotatably mounted on the mounting bracket and passes through the support base 15. There are two mounting brackets, which are located on opposite sides of the support base 15. There are two eccentric components 24. Each eccentric component 24 includes an eccentric wheel 240, a first bearing 241, a connecting rod 242, a grinding sleeve 243, and a first rotating shaft 244. The eccentric wheel 240 is fixed to the drive shaft 23 via a spline, and the eccentricity of the eccentric wheel 240 is half the stroke of the upper tool holder 61. The first bearing 241 is a deep groove ball bearing. The eccentric wheel 240 is connected to the big end of the connecting rod 242 via the deep groove ball bearing. The grinding sleeve 243 is installed in the shaft hole at one end of the connecting rod 242. The first rotating shaft 244 is installed on the grinding sleeve 243 and is fixedly connected to the movable beam 30. In this embodiment, the grinding sleeve 243 is a copper sleeve. The rotation of the eccentric wheel 240 converts the rotation of the lifting drive component 21 into the linear motion of the movable beam 30. At the same time, one drive shaft 23 drives two eccentric wheels 240, realizing the synchronization of the two connecting rods 242.

[0036] The movable beam 30 includes a main body 31 and a slider 32 fixed to the main body 31. The slider 32 is slidably connected to the guide rail 120. Driven by the lifting drive structure 20, the movable beam 30 slides up and down along the column 12 to shear. Braking of the lifting drive structure 21 allows the movable beam 30 to stop at any position. The brake 40 is a disc brake, which, by braking the drum gear coupling, enables braking of the movable beam 30 even when the servo motor is powered off.

[0037] The connecting assembly 50 includes a first guide rod 51, a first elastic element 52, and a nut 53. The first guide rod 51 is fixed to the main body 31 of the movable beam 30 and passes through the fixed beam 14. The nut 53 is installed on the top of the first guide rod 51. The first elastic element 52 is sleeved on the first guide rod 51, and its two ends abut against the nut 53 and the fixed beam 14, respectively. When the movable beam 30 moves downward, the first elastic element 52 is compressed, and the movable beam 30 is subjected to an upward force.

[0038] Please continue reading. Figure 2The tool holder assembly 60 includes an upper tool holder 61, a lower tool holder 62, and a sliding structure 63. The upper tool holder 61 is slidably connected to the lower tool holder 62 through the sliding structure 63.

[0039] Please continue reading. Figure 3 The upper tool holder 61 includes an upper frame 610, a connecting shaft 611, a second guide rod 612, a pressure plate 613, and a second elastic element 614. The connecting shaft 611 is fixed to the upper frame 610 and rotatably mounted to the movable beam 30 via a mounting assembly 70. The mounting assembly 70 includes a bearing sleeve 71 and a second bearing 72. The bearing sleeve 71 is fixed to the main body 31 of the movable beam 30. The second bearing 72 includes a cylindrical roller bearing and a thrust ball bearing. The connecting shaft 611 is rotatably mounted to the bearing sleeve 71 via the roller bearing and the thrust ball bearing. Please continue reading. Figure 2 The second guide rod 612 is fixed to the pressure plate 613 and passes through the upper frame 610. A nut is provided at the top of the second guide rod 612. The second elastic element 614 is sleeved on the second guide rod 612, and its two ends abut against the pressure plate 613 and the nut, respectively. Under the action of the second elastic element 614, the pressure plate 613 presses the plate with a certain clamping force.

[0040] Please continue reading. Figure 4The lower tool holder 62 includes a lower frame body 620, a lower pressure block 621, a mounting base 622, a rotating wheel 623, a third elastic element 624, a sliding seat 625, a stop block 626, and an adjusting screw 627. The lower pressure block 621 is fixed to the bottom of the lower frame body 620. A pressure plate 150 is provided on the support base 15. The pressure plate 150 maintains a small gap contact with the pressure block 621 to reduce the friction of the tool holder assembly 60 during rotation, and at the same time, it provides a certain auxiliary support for the tool holder assembly 60 during rotation. The mounting base 622 is fixed to the bottom of the lower frame body 620. The rotating wheel 623 is rotatably mounted on the mounting base 622. The two ends of the third elastic element 624 abut against the mounting base 622 and the rotating wheel 623, respectively. The rotating wheel 623 is mounted on the rolling track 151 of the support base 15. The third elastic element 624 is a disc spring. In the non-shearing state, the clamping force of the disc spring is balanced with the weight of the tool holder assembly 60, making the tool holder assembly 60 float. The pressure plate 150 and the pressure block 621 maintain a small gap contact, reducing the friction of the tool holder assembly 60 during rotation, and at the same time providing some auxiliary support for the tool holder assembly 60 during rotation. Due to the downward force of the movable beam 30, the third elastic element 624 of the rotating wheel 623 is compressed, and the rotating wheel 623 moves upward a small distance relative to the lower frame 620. The lower pressure block 621 is in close contact with the arc-shaped rolling track 151. The downward force of the movable beam 30 is transmitted through the upper pressure block 621 to the upper blade, through the plate to the lower frame 620, and through the pressure plate 150 to the support base 15. During the shearing process, the force on the intermediate shaft is borne by the plane bearing. During the upward movement of the movable beam 30, the downward force disappears, the disc spring rebounds, and the lower frame 620 moves upward. The lower frame 620 is in a floating state and can complete the rotational movement. Both the upper and lower support tracks are arc-shaped, which ensures that the lower frame 620 is in contact with the pressure block 621 within the shear angle range, and bears the downward force of the movable beam 30.

[0041] Please continue reading. Figure 6 The sliding seat 625 is slidably mounted on the lower frame 620. The contact surface between the sliding seat 625 and the lower frame 620 is inclined. The sliding seat 625 is pressed onto the lower frame 620 by a spring passing through the sliding seat screw. A stop 626 is installed on one side of the sliding seat 625. The stop 626 has a screw hole that connects to the adjusting screw 627. The adjusting screw 627 is axially fixed to the lower frame 620 by a thrust bearing. The screw holes for the fixing screws of the lower frame 620 and the sliding seat 625 are all oblong holes. The contact surface between the lower frame 620 and the sliding seat 625 is inclined. Rotating the adjusting screw 627 causes the sliding seat 625 to move under the action of the stop 626. Through the action of the inclined surface, the lower frame 620 moves back and forth, thereby adjusting the blade gap. After the blade gap is adjusted to the correct position, tighten the fixing screws of the lower frame 620 to press the spring of the sliding seat 625.

[0042] The sliding structure 63 includes a connecting guide rail 631 and a plate 632. The connecting guide rail 631 is a copper guide rail plate, and the plate 632 is a hardened plate. The connecting guide rail 631 is fixed to the upper tool holder 61, and the plate 632 is fixed to the lower tool holder 62. The connecting guide rail 631 and the plate 632 are slidably connected. The plate 632 restricts the rotation of the upper tool holder 61 in the lower tool holder 62, while providing precise guidance for the up and down movement of the upper tool holder 61 in the lower tool holder 62 and bearing the lateral thrust of shearing.

[0043] Please continue reading. Figure 5 The rotary drive structure 80 includes a rotary drive component 81, a first transmission component 82, a second transmission component 83, a second rotating shaft 84, and a third bearing 85. The rotary drive component 81 is a motor, which is fixed on the base 11. The first transmission component 82 is a pinion gear, which is fixed on the output shaft of the motor. The rotary drive component 81 drives the first transmission component 82 to rotate. The second transmission component 83 is a large gear, which is installed at the bottom of the lower tool holder 62. Power is transmitted through the meshing of the large and small gears, thereby driving the lower tool holder 62 and the upper tool holder 61 to rotate.

[0044] When using the sheet metal shearing equipment, the lifting drive 21 drives the transmission shaft 23 to rotate, thereby rotating the eccentric wheel 240. The rotation of the eccentric wheel 240 drives the connecting rod 242 to move up and down. During the shearing process, the movable beam 30 drives the upper blade holder 61 to move downward. The pressure plate 613 mounted on the upper blade holder 61 moves downward at the same time. The pressure plate 613 and the blade simultaneously contact the sheet metal. Under the action of the second elastic element 614, the pressure plate 613 presses the sheet metal with a certain clamping force. The movable beam 30 continues to move downward with the upper blade, squeezing the sheet metal. Together with the lower blade, it completes the shearing. The rotary drive 81 drives the blade holder assembly 60 to rotate relative to the frame 10 through the transmission component. Adjusting the rotation angle and time of the rotary drive 81 changes the feeding time and the angle between the blade holder assembly 60 and the feeding line. By matching the speed of the rotary drive 81, the lifting drive 21, and the feeding motor speed of the production line, shearing of sheets of different angles and lengths can be achieved, and the production cycle can be precisely controlled.

[0045] An eccentric wheel 240 is installed on the drive shaft 23 of this application to convert the rotation of the lifting drive component 21 into linear motion, driving the upper blade holder 61 to fall for shearing. This allows for precise adjustment of the running speed of the upper blade holder 61, controlling the shearing speed, improving production line efficiency, or preventing excessive shearing speed that could tear the steel plate and affect shearing quality. The rotary drive component 81 drives the blade holder assembly 60 to rotate relative to the frame 10 via a transmission component. Adjusting the rotation angle and time of the rotary drive component 81 changes the feeding time and the angle between the blade holder assembly 60 and the feeding line. By matching the speeds of the rotary drive component 81, the lifting drive component 21, and the production line feeding motor, different angles and lengths of plates can be sheared, while also precisely controlling the production cycle. The first elastic element 52 is sleeved on the first guide rod 51. Both ends of the first elastic element 52 abut against the nut 53 and the fixed beam 14, respectively, balancing the weight of the movable beam 30 and the upper blade holder 61, reducing the rotational inertia of the movable beam 30, eliminating the gap between the connecting rod 242 and the movable beam 30, and reducing the impact and wear of the stressed components. The rotating wheel 623 at the lower part of the lower tool holder 62 is equipped with a spring floating device, so that when the lower tool holder 62 is subjected to the downward force of the movable beam 30, the rotating wheel 623 is not subjected to force, thus avoiding damage to the shaft of the rotating wheel 623 due to excessive force. The second guide rod 612 is fixed to the pressure plate 613 and is installed on the upper frame 610 through the nut 53. The second elastic element 614 is sleeved on the second guide rod 612, and both ends of the second elastic element 614 abut against the nut 53 and the pressure plate 613 respectively. Under the premise of allowing the tool holder assembly 60 to rotate freely, it avoids damage from excessive force during shearing, and ensures that the downward force of the movable beam 30 is transmitted through the upper and lower pressure blocks and finally transmitted to the frame 10, so that the upper and lower intermediate shafts are not subjected to force or are subjected to minimal force, while also reducing the size of the parts. The contact surface between the sliding seat 625 and the lower frame 620 is an inclined surface. The stop block 626 is fixed to the sliding seat 625. The adjusting screw 627 is threadedly connected to the stop block 626. The rotation of the adjusting screw 627 causes the stop block 626 to move the sliding seat 625 relative to the lower frame 620 to adjust the blade gap. By adjusting the lower blade position through the inclined surface, the gap between the upper and lower blades can be adjusted to adapt to the purpose of shearing steel plates of different thicknesses.

[0046] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. A sheet metal shearing device, comprising a frame and a blade holder assembly, characterized in that: The sheet metal shearing equipment further includes a lifting drive structure, a movable beam, and a rotary drive structure. The lifting drive structure includes a lifting drive component, a transmission shaft, and an eccentric assembly. The lifting drive component is driven by the transmission shaft and drives the transmission shaft to rotate. The eccentric assembly includes an eccentric wheel and a connecting rod. The eccentric wheel is fixed to the transmission shaft, and both ends of the connecting rod are connected to the eccentric wheel and the movable beam, respectively. The movable beam is slidably mounted on the frame. The tool holder assembly includes an upper tool holder and a lower tool holder. The upper tool holder is rotatably mounted on the movable beam, and the lower tool holder is rotatably mounted on the frame. The upper and lower tool holders are slidably connected. The rotary drive structure includes a rotary drive component and a transmission component. The rotary drive component is driven by the transmission component and drives the tool holder assembly to rotate relative to the frame.

2. The sheet metal shearing equipment according to claim 1, characterized in that: The lifting drive component is a motor, which is fixed to the frame. The transmission shaft is rotatably mounted on the frame. There are two eccentric components, which are located on both sides of the tool holder assembly.

3. The sheet metal shearing equipment according to claim 2, characterized in that: The eccentric assembly further includes a first bearing and a first rotating shaft. The first bearing is mounted on the eccentric wheel, and the first rotating shaft is mounted on the movable beam. The two ends of the connecting rod are respectively connected to the first bearing and the first rotating shaft.

4. The sheet metal shearing equipment according to claim 1, characterized in that: The frame includes a base, a column, and a fixed beam. The column is fixed to the base. The lifting drive and the transmission shaft are mounted on the base. The fixed beam is fixed to the top of the column. The movable beam is slidably mounted on the column. The plate shearing equipment also includes a connecting assembly. The connecting assembly includes a first guide rod, a first elastic element, and a nut. The first guide rod is fixed to the movable beam and passes through the fixed beam. The nut is fixed to the end of the first guide rod. The first elastic element is sleeved on the first guide rod, and both ends of the first elastic element abut against the nut and the fixed beam, respectively.

5. The sheet metal shearing equipment according to claim 1, characterized in that: The upper tool holder includes an upper frame and a pressure plate, with the pressure plate floatingly mounted on the upper frame.

6. The sheet metal shearing equipment according to claim 5, characterized in that: The upper tool holder also includes a second guide rod and a second elastic element. The second guide rod is fixed to the pressure plate and is installed on the upper frame body by a nut. The second elastic element is sleeved on the second guide rod and its two ends abut against the nut and the pressure plate, respectively.

7. The sheet metal shearing equipment according to claim 1, characterized in that: The lower tool holder includes a lower frame and a rotating wheel mounted on the lower frame. The frame also includes a support base. The tool holder assembly is rotatably mounted on the support base. The support base is provided with a rolling track, and the rotating wheel is located on the rolling track.

8. The sheet metal shearing equipment according to claim 7, characterized in that: The lower tool holder also includes a mounting base and a third elastic element. The mounting base is fixed to the lower frame body, and the two ends of the third elastic element abut against the mounting base and the rotating wheel, respectively.

9. The sheet metal shearing equipment according to claim 8, characterized in that: The lower tool holder also includes a lower pressure block, which is fixed to the lower frame body. The support base includes a pressure plate, and the lower pressure block is in gap contact with the pressure plate.

10. The sheet metal shearing equipment according to claim 7, characterized in that: The lower tool holder also includes a sliding seat, a stop block, and an adjusting screw. The contact surface between the sliding seat and the lower tool holder is an inclined surface. The stop block is fixed to the sliding seat. The adjusting screw is threadedly connected to the stop block. Rotating the adjusting screw causes the stop block to move the sliding seat relative to the lower tool holder to adjust the blade gap.

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