Double punch die cutting structure and punch system

Abstract

The utility model provides a kind of double punch punching structure and punch press system, wherein double punch punching structure, including rack, driving wheel being installed on rack, first eccentric shaft being eccentrically installed on driving wheel, first eccentric transmission mechanism being installed on first eccentric shaft, first punch and driving device being connected to first eccentric transmission mechanism, still include second eccentric shaft, coaxially connect on driving wheel by shaft coupling;Second eccentric transmission mechanism, is installed on second eccentric shaft;Second punch, is connected to second eccentric transmission mechanism;Driving device is used to drive driving wheel rotation, to drive first eccentric transmission mechanism and second eccentric transmission mechanism respectively drive first punch and second punch reciprocating lifting movement.This double punch punching structure can drive double punch lifting punching simultaneously, is suitable for large-scale punching operation, improves punching production efficiency, avoids using too many single punch punch press complete machine, reduces punching equipment and its maintenance cost, saves punch press system occupied site space.

Description

Technical Field

[0001] This utility model relates to the field of stamping technology, and in particular to a double-punch punching structure and a punching system using the same. Background Technology

[0002] Currently, traditional punching machine tools mainly adopt single punch (single machine head) punching systems. These single punch punching systems adopt a single punch punching structure, including a frame and a drive device and a punch transmission device mounted on the frame, as well as a punch that is driven by the drive device to drive the punch transmission device to perform lifting and lowering movements.

[0003] However, this type of single-punch punching system can only drive the single punch to lift and punch. For large-scale punching operations, in order to improve production efficiency, more punching machine tools with single-punch punching systems are needed, which increases the cost of punching equipment and its use and maintenance, and occupies a large production space. Utility Model Content

[0004] This utility model proposes a double-punch punching structure and a punching system using it, in order to solve the technical problem that the traditional single-punch punching system can only drive the single punch to lift and cut, resulting in low production efficiency of the punching equipment.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a double-punch punching structure, including a frame, a drive wheel mounted on the frame, a first eccentric shaft eccentrically mounted on the drive wheel, a first eccentric transmission mechanism mounted on the first eccentric shaft, a first punch connected to the first eccentric transmission mechanism, and a driving device, and further including:

[0007] The second eccentric shaft is coaxially connected to the drive wheel via a coupling;

[0008] The second eccentric transmission mechanism is mounted on the second eccentric shaft;

[0009] The second punch is connected to the second eccentric transmission mechanism;

[0010] The drive unit is used to drive the drive wheel to rotate, so as to drive the first eccentric transmission mechanism and the second eccentric transmission mechanism to drive the first punch and the second punch to reciprocate up and down.

[0011] Preferably, the frame includes:

[0012] Support base;

[0013] A horizontal top plate extends horizontally along the first direction and is spaced apart above the support base;

[0014] Several supporting columns extend vertically and connect between the horizontal top plate and the supporting base;

[0015] The first mounting plate and the second mounting plate are spaced apart on the top surface of the horizontal top plate in the first direction. The drive wheel is mounted on the first mounting plate, and the first eccentric shaft passes through the first mounting plate and the second mounting plate.

[0016] The third, fourth, and fifth mounting plates are sequentially and alternately arranged on the side of the first mounting plate facing away from the second mounting plate in the first direction, and are installed on the top surface of the horizontal top plate.

[0017] The double-punch cutting structure also includes:

[0018] A connecting shaft passes through the third mounting vertical plate, with one end coaxially connected to the drive wheel;

[0019] The second eccentric shaft passes between the fourth and fifth mounting vertical plates, and one end of the second eccentric shaft is coaxially connected to the other end of the connecting shaft via a coupling.

[0020] Preferably, the horizontal top plate is provided with a first clearance hole directly opposite the first eccentric shaft, and a first guide structure is provided around the first clearance hole. The first punch passes through the first clearance hole and is mounted on the first guide structure in a lifting and lowering motion.

[0021] The first eccentric transmission mechanism includes:

[0022] The first connecting rod has a first bushing at one end, and a first hinge hole matching the first eccentric shaft is formed on the inner side of the first bushing. The other end of the first connecting rod opposite the first bushing has a second hinge hole.

[0023] The first hinge shaft matches the second hinge hole and is installed in the connecting rod insertion hole located at the end of the first punch facing the first eccentric shaft and matching the shape of the first connecting rod.

[0024] One end of the first connecting rod is hinged to the first eccentric shaft through the first hinge hole, and the other end of the first connecting rod is inserted into the connecting rod insertion hole and hinged to the first hinge shaft through the second hinge hole.

[0025] Preferably, a second clearance hole is provided on the horizontal top plate directly opposite the second eccentric shaft, and a second guide structure is provided around the second clearance hole;

[0026] The second punch includes:

[0027] The punch body is inserted into the second clearance hole and is mounted on the second guide structure in a lifting and lowering motion.

[0028] A pair of mounting seats are spaced apart at one end of the punch body facing the second eccentric shaft;

[0029] The second eccentric transmission mechanism includes:

[0030] The driven wheel is eccentrically mounted on the second eccentric shaft;

[0031] The second connecting rod includes a connecting collar and a second bushing protruding from one end of the connecting collar. A third hinge hole matching the driven wheel is formed on the inner side of the connecting collar, and a fourth hinge hole is formed on the inner side of the second bushing.

[0032] The second hinge shaft matches the fourth hinge hole and passes between a pair of mounting bases;

[0033] One end of the second link is hinged to the driven wheel through the third hinge hole, and the other end of the second link is hinged to the second hinge shaft through the fourth hinge hole.

[0034] Preferably, the first mounting vertical plate, the second mounting vertical plate, and the third mounting vertical plate are respectively provided with a first mounting bearing, a second mounting bearing, and a third mounting bearing. The drive wheel is mounted on the first mounting bearing, the end of the first eccentric shaft away from the drive wheel is mounted on the second mounting bearing, and the connecting shaft is mounted on the third mounting bearing.

[0035] The fourth and fifth mounting plates are respectively equipped with the fourth and fifth mounting bearings, and the second eccentric shaft is mounted on the fourth and fifth mounting bearings.

[0036] Preferably, a first bushing matching the shape of the first eccentric shaft is provided inside the first hinge hole, and the first hinge hole is hinged to the first eccentric shaft through the first bushing.

[0037] The first punch is provided with a pair of bushing mounting holes on both sides of the connecting rod insertion hole. The inner side of the bushing mounting hole is provided with a second bushing that matches the shape of the first hinge shaft. The first hinge shaft passes through the pair of second bushings.

[0038] Preferably, the driving device includes:

[0039] The drive unit is mounted on the first mounting plate;

[0040] The drive wheel is mounted on the output shaft of the drive unit;

[0041] A timing belt is fitted between the drive wheel and the driving wheel;

[0042] The drive unit is used to drive the output shaft to rotate, so that the drive wheel drives the timing belt and the drive wheel to rotate synchronously.

[0043] Preferably, the drive unit is a drive motor, and the first mounting plate is also provided with a sixth mounting bearing, on which the output shaft is mounted.

[0044] This utility model also provides a punching system, including the above-mentioned double punching structure.

[0045] Preferably, the bottom ends of the first punch and the second punch are connected to the first punching die and the second punching die, respectively.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The dual-punch punching structure and punching system provided by this utility model can simultaneously drive the dual punches to lift and punch, which is suitable for large-scale punching operations, improves punching production efficiency, avoids the use of too many single-punch punching systems in the punching machine tool, reduces the cost of punching equipment and its use and maintenance, and saves the production space occupied by the punching system. Attached Figure Description

[0048] To more clearly illustrate the technical solution proposed by this utility model, the present utility model will be described in detail below with reference to the embodiments and accompanying drawings. It should be understood that the embodiments and accompanying drawings described in the following detailed description are merely some embodiments of this utility model, and those skilled in the art can make changes to these drawings under the concept of this utility model.

[0049] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the double-punch punching structure provided by this utility model;

[0050] Figure 2 A front view schematic diagram of an embodiment of the double-punch punching structure provided by this utility model;

[0051] Figure 3 A partial cross-sectional view of an embodiment of the double-punch cutting structure provided by this utility model;

[0052] Figure 4 for Figure 3 A magnified schematic diagram of a portion of region A in the diagram;

[0053] Figure 5 for Figure 3 A side view of the second eccentric transmission mechanism in the double-punch punching structure.

[0054] Figure 6 for Figure 3 A schematic diagram of the main structure of the second link in the diagram;

[0055] Figure 7 for Figure 5 A side view of the second link in the structure;

[0056] Figure 8 for Figure 3 A schematic diagram of the main structure of the first punch in the process;

[0057] Figure 9 for Figure 5 A side view of the first punch in the process;

[0058] Figure 10 A three-dimensional structural diagram of the first eccentric transmission mechanism provided by this utility model. Figure 1 ;

[0059] Figure 11 A three-dimensional structural diagram of the first eccentric transmission mechanism provided by this utility model. Figure 2 ;

[0060] Figure 12 A front view schematic diagram of the first eccentric transmission mechanism provided by this utility model;

[0061] Figure 13 for Figure 12 A cross-sectional structural schematic diagram of the first eccentric transmission mechanism in the diagram;

[0062] Figure 14 A side sectional view of the first eccentric transmission mechanism provided by this utility model.

[0063] The main markings in the attached figures are as follows:

[0064] 1. Frame; 11. Support base; 12. Horizontal top plate; 121. First clearance hole; 122. First guide structure; 123. Second clearance hole; 124. Second guide structure; 13. Support column; 14. First mounting plate; 141. First mounting bearing; 142. Sixth mounting bearing; 143. First bearing pressure plate; 15. Second mounting plate; 151. Second mounting bearing; 152. Auxiliary wheel; 153. Second bearing pressure plate; 16. Third mounting plate; 161. Third mounting bearing; 162. Electromagnetic brake device; 17. Fourth mounting plate; 171. Fourth mounting bearing; 172. First limit plate; 18. Fifth mounting plate; 181. Fifth mounting bearing; 182. Second limit plate; 2. Drive wheel; 3. First eccentric shaft; 31. 4. First bushing; 5. First eccentric transmission mechanism; 6. First connecting rod; 7. First bushing; 8. First hinge hole; 9. Second hinge shaft; 10. First hinge shaft; 11. First hinge hole; 11. Second hinge shaft; 12. First hinge shaft; 13. First punch; 14. Connecting rod insertion hole; 15. Bushing mounting hole; 16. Second bushing; 17. Drive device; 18. Drive unit; 19. Output shaft; 10. Drive wheel; 11. Timing belt; 12. Second eccentric shaft; 13. Coupling; 14. Connecting shaft; 15. Second eccentric transmission mechanism; 16. Driven wheel; 17. Second connecting rod; 18. Connecting collar; 19. Third hinge hole; 10. Second hinge shaft; 10. Second punch; 11. Punch body; 11. Mounting seat; 12. Shaft hole; 13. Protective cover.

[0065] Other markings in the diagram are as follows:

[0066] X, first direction; Y, second direction; Z, vertical direction. Detailed Implementation

[0067] Please refer to the following: Figure 1-14 The double-punch cutting structure provided by this utility model includes a frame 1, a drive wheel 2 mounted on the frame 1, a first eccentric shaft 3 eccentrically mounted on the drive wheel 2, a first eccentric transmission mechanism 4 mounted on the first eccentric shaft 3, a first punch 5 connected to the first eccentric transmission mechanism 4, and a drive device 6, and further includes:

[0068] The second eccentric shaft 7 is coaxially connected to the drive wheel 2 via a coupling 71; the second eccentric transmission mechanism 8 is mounted on the second eccentric shaft 7; and the second punch 9 is connected to the second eccentric transmission mechanism 8.

[0069] The drive device 6 is used to drive the drive wheel 2 to rotate, thereby driving the first eccentric shaft 3 to rotate eccentrically and simultaneously driving the second eccentric shaft 7 to rotate coaxially with the drive wheel 2. This causes the first eccentric shaft 3 and the second eccentric shaft 7 to drive the first eccentric transmission mechanism 4 and the second eccentric transmission mechanism 8 to drive the first punch 5 and the second punch 9 to reciprocate up and down, so that the first punch 5 and the second punch 9 perform punching operations respectively.

[0070] Please refer to the following: Figure 1-5 10-14, In this embodiment, the rack 1 includes:

[0071] A support base 11 is used to support the entire double-punch cutting structure; a horizontal top plate 12 extends horizontally along the first direction X and is spaced above the support base 11; a plurality of support columns 13 extend vertically along the Z and are connected between the horizontal top plate 12 and the support base 11; a first mounting vertical plate 14 and a second mounting vertical plate 15 are spaced apart on the top surface of the horizontal top plate 12 in the first direction X; a drive wheel 2 is mounted on the first mounting vertical plate 14; a first eccentric shaft 3 passes through the first mounting vertical plate 14 and the second mounting vertical plate 15; a third mounting vertical plate 16, a fourth mounting vertical plate 17 and a fifth mounting vertical plate 18 are sequentially spaced apart on the side of the first mounting vertical plate 14 facing away from the second mounting vertical plate 15 in the first direction X, and are mounted on the top surface of the horizontal top plate 12.

[0072] The double-punch cutting structure also includes:

[0073] A connecting shaft 72 is inserted through the third mounting vertical plate 16, and one end of the connecting shaft 72 is coaxially connected to the drive wheel 2.

[0074] The second eccentric shaft 7 is inserted between the fourth mounting vertical plate 17 and the fifth mounting vertical plate 18, and one end of the second eccentric shaft 7 is coaxially connected to the other end of the connecting shaft 72 through the coupling 71.

[0075] Please refer to the following: Figure 1-14 In this embodiment, the horizontal top plate 12 is provided with a first clearance hole 121 that matches the shape of the first punch 5 at the first eccentric shaft 3. A first guide structure 122 is provided around the first clearance hole 121. The first punch 5 passes through the first clearance hole 121 and is mounted on the first guide structure 122 in a lifting and lowering motion.

[0076] Please refer to the following: Figure 1-3 10-14, the first eccentric transmission mechanism 4 includes:

[0077] The first connecting rod 41 has a first bushing 411 at one end, and a first hinge hole 4111 matching the first eccentric shaft 3 is formed inside the first bushing 411. The other end of the first connecting rod 41 opposite the first bushing 411 has a second hinge hole 412. The first hinge shaft 42 matches the second hinge hole 412 and is installed in the connecting rod insertion hole 51 located at the end of the first punch 5 facing the first eccentric shaft 3 and matching the shape of the first connecting rod 41.

[0078] One end of the first connecting rod 41 is hinged to the first eccentric shaft 3 through the first hinge hole 4111, and the other end of the first connecting rod 41 is inserted into the connecting rod insertion hole 51 and hinged to the first hinge shaft 42 through the second hinge hole 412, so that the two ends of the first eccentric transmission mechanism 4 are connected between the first eccentric shaft 3 and the first punch 5 through the first connecting rod 41 and the first hinge shaft 42 respectively.

[0079] Please refer to the following: Figure 1-9 In this embodiment, the horizontal top plate 12 is provided with a second clearance hole 123 that matches the shape of the second punch 9 at the position directly opposite the second eccentric shaft 7, and a second guide structure 124 is provided around the second clearance hole 123.

[0080] The second punch 9 includes:

[0081] The punch body 91 passes through the second clearance hole 123 and is mounted on the second guide structure 124 in a lifting and lowering motion; a pair of mounting seats 92 are spaced apart in the first direction X at one end of the punch body 91 facing the second eccentric shaft 7.

[0082] The second eccentric transmission mechanism 8 includes:

[0083] Driven wheel 81 is eccentrically mounted on second eccentric shaft 7; second connecting rod 82 includes connecting collar 821 and second bushing 822 protruding from one end of connecting collar 821, the inner side of connecting collar 821 forms a third hinge hole 8211 that matches driven wheel 81, the inner side of second bushing 822 forms a fourth hinge hole 8221; second hinge shaft 83 matches fourth hinge hole 8221, mounting base 92 is provided with shaft hole 921 that matches second hinge shaft 83, and second hinge shaft 83 passes through the corresponding shaft hole 921 of a pair of mounting bases 92.

[0084] One end of the second connecting rod 82 is hinged to the driven wheel 81 through the third hinge hole 8211, and the other end of the second connecting rod 82 is hinged to the second hinge shaft 83 through the fourth hinge hole 8221, so that the two ends of the second eccentric transmission mechanism 8 are connected between the second eccentric shaft 7 and the second punch 9 through the second connecting rod 82 and the second hinge shaft 83 respectively.

[0085] As a preferred embodiment of this embodiment, a protective cover 10 is provided at the top of the horizontal top plate 12 corresponding to the second eccentric transmission mechanism 8. The protective cover 10 covers and protects the portion of the fourth mounting vertical plate 17, the fifth mounting vertical plate 18 and the second eccentric shaft 7 that pass through the fourth mounting vertical plate 17 and the fifth mounting vertical plate 18, as well as the portion of the second eccentric transmission mechanism 8 located between the fourth mounting vertical plate 17, the fifth mounting vertical plate 18 and the horizontal top plate 12.

[0086] Please refer to the following: Figure 1-5 10-14 In this embodiment, the drive device 6 is used to drive the drive wheel 2 to rotate, so as to drive the drive wheel 2 of the first eccentric shaft 3 to rotate eccentrically, thereby driving the bushing 411 at one end of the first connecting rod 41 to swing around the first eccentric shaft 3 through the first hinge hole 4111 as the first eccentric shaft 3 rotates eccentrically, and driving the fourth hinge hole 8221 at the other end of the first connecting rod 41 to swing around the second hinge shaft 83. Then, through the eccentric rotation of the first eccentric shaft 3 and the swing of the two ends of the first connecting rod 41 around the first eccentric shaft 3 and the second hinge shaft 83 respectively, the first punch 5 is driven to move vertically up and down along the first guide structure 122 to perform punching operations.

[0087] The drive unit 6 drives the drive wheel 2 to rotate, causing the first eccentric shaft 3 to rotate eccentrically. At the same time, it drives the second eccentric shaft 7 to rotate coaxially with the drive wheel 2, thereby causing the driven wheel 81 to rotate eccentrically relative to the second eccentric shaft 7. This, in turn, causes the connecting collar 821 at one end of the second connecting rod 82 to swing around the driven wheel 81 through the third hinge hole 8211 as the driven wheel 81 rotates eccentrically. This also causes the second bushing 822 at the other end of the second connecting rod 82 to swing around the second hinge shaft 83 through the fourth hinge hole 8221. Finally, through the eccentric rotation of the driven wheel 81 and the swinging of the two ends of the second connecting rod 82 around the driven wheel 81 and the second hinge shaft 83 respectively, the second punch 9 is driven to move vertically up and down along the second guide structure 124 to perform the punching operation.

[0088] Please refer to the following: Figure 1-3 10-14 In this embodiment, a pair of first guide structures 122 are provided on the opposite sides of the first clearance hole 121, and a pair of first sliders (not shown in the figure) are provided on the opposite sides of the first punch 5 to correspond to and match the pair of first guide structures 122. The first punch 5 is mounted on the pair of first guide structures 122 in a lifting and lowering motion by sliding cooperation with the pair of first guide structures 122 through the pair of first sliders.

[0089] A pair of second guide structures 124 are provided on the opposite sides of the second clearance hole 123. The punch body 91 of the second punch 9 is provided on the opposite sides of the pair of second guide structures 124, and the second slider (not shown in the figure) is provided on the opposite sides of the pair of second guide structures 124. The second punch 9 is mounted on the pair of second guide structures 124 in a lifting and lowering motion by sliding cooperation with the pair of second guide structures 124 through the pair of second sliders.

[0090] Please refer to the following: Figure 1-3 10-14, as a preferred embodiment of this example, the first guide structure 122 is a first vertical guide rail, and the second guide structure 124 is a cylindrical vertical guide sleeve.

[0091] In other embodiments (not shown in the figure), the first guide structure 122 may also be a cylindrical vertical guide sleeve, and the second guide structure 124 may also be a second guide structure.

[0092] Please refer to the following: Figure 1-510-14 In this embodiment, the first mounting plate 14, the second mounting plate 15, and the third mounting plate 16 are respectively provided with the first mounting bearing 141, the second mounting bearing 151, and the third mounting bearing 161 in the corresponding mounting holes. The drive wheel 2 is mounted on the first mounting bearing 141, the end of the first eccentric shaft 3 away from the drive wheel 2 is mounted on the second mounting bearing 151, and the connecting shaft 72 is mounted on the third mounting bearing 161. The fourth mounting plate 17 and the fifth mounting plate 18 are respectively provided with the fourth mounting bearing 171 and the fifth mounting bearing 181, and the second eccentric shaft 7 is mounted on the fourth mounting bearing 171 and the fifth mounting bearing 181.

[0093] Please see Figure 3 As a preferred embodiment of this invention, an electromagnetic braking device 162 is installed on the third mounting vertical plate 16. This device is used to act on the second eccentric shaft 7 when an abnormality occurs during the punching operation of the double punching structure, so as to stop the second eccentric shaft 7 and the first eccentric shaft 3 at the first moment and prevent the product from being cut.

[0094] Please see Figure 3 In a preferred embodiment, a pair of first bearing pressure plates 143 are respectively installed on opposite sides of the first mounting vertical plate 14 to press the first mounting bearing 141 into the corresponding mounting hole on the first mounting vertical plate 14; a pair of second bearing pressure plates 153 are respectively installed on opposite sides of the second mounting vertical plate 15 to press the second mounting bearing 151 into the corresponding mounting hole on the second mounting vertical plate 15.

[0095] Please see Figure 3 In a preferred embodiment, the fourth mounting plate 17 is equipped with a first limiting piece 172 on the side facing the second connecting rod 82, and the fifth mounting plate 18 is equipped with a second limiting piece 182 on the side facing the second connecting rod 82. The first limiting piece 172 and the second limiting piece 182 are respectively provided on both sides of the second connecting rod 82 to limit the second connecting rod 82 and prevent the second connecting rod 82 from swaying left and right when swinging, so as to improve the punching stability.

[0096] Please refer to the following: Figure 1-3 10-14. As a preferred embodiment of this example, an auxiliary wheel 152 coaxial with the drive wheel 2 is mounted on the second mounting bearing 151 of the second mounting vertical plate 15. The end of the first eccentric shaft 3 away from the drive wheel 2 is eccentrically mounted on the auxiliary wheel 152. When the drive wheel 2 rotates, the auxiliary wheel 152 is driven to rotate synchronously through the first eccentric shaft 3, so as to improve the rotational stability of the first eccentric shaft 3.

[0097] Please refer to the following: Figure 1-310-14 In this embodiment, a first bushing 31 matching the shape of the first eccentric shaft 3 is provided on the inner side of the first hinge hole 4111. The first hinge hole 4111 is hinged to the first eccentric shaft 3 through the first bushing 31. A pair of bushing mounting holes 52 are respectively provided on both sides of the first punch 5 corresponding to the connecting rod insertion hole 51. A second bushing 521 matching the shape of the first hinge shaft 42 is provided on the inner side of the bushing mounting hole 52. The first hinge shaft 42 passes through the pair of second bushings 521.

[0098] Please refer to the following: Figure 1-3 10-14, In this embodiment, the driving device 6 includes:

[0099] The drive unit 61 is mounted on the first mounting vertical plate 14 and is horizontally spaced from the drive wheel 2 in the second direction Y, which is perpendicular to the first direction X; the drive wheel 62 is mounted on the output shaft 611 of the drive unit 61; the timing belt 63 extends along the second direction Y and is sleeved between the drive wheel 62 and the drive wheel 2.

[0100] The drive unit 61 is used to drive the output shaft 611 to rotate, so as to drive the drive wheel 62 to drive the synchronous belt 63 and the drive wheel 2 to rotate synchronously.

[0101] Please refer to the following: Figure 1-3 10-14, as a preferred embodiment of this example, the drive unit 61 is a drive motor, and the first mounting vertical plate 14 is also provided with a sixth mounting bearing 142, and the output shaft 611 of the drive motor (drive unit 61) is mounted on the sixth mounting bearing 142.

[0102] This utility model also provides a punching system, including the above-mentioned double punching structure.

[0103] In one embodiment (not shown in the figure), the bottom ends of the first punch 5 and the second punch 9 are respectively connected to the first punching die (not shown in the figure) and the second punching die (not shown in the figure).

[0104] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art should understand that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-punch punching structure, comprising a frame (1), a drive wheel (2) mounted on the frame (1), a first eccentric shaft (3) eccentrically mounted on the drive wheel (2), a first eccentric transmission mechanism (4) mounted on the first eccentric shaft (3), a first punch (5) connected to the first eccentric transmission mechanism (4), and a drive device (6), characterized in that, Also includes: The second eccentric shaft (7) is coaxially connected to the drive wheel (2) via a coupling (71); The second eccentric transmission mechanism (8) is mounted on the second eccentric shaft (7); The second punch (9) is connected to the second eccentric transmission mechanism (8); The drive device (6) is used to drive the drive wheel (2) to rotate, so as to drive the first eccentric transmission mechanism (4) and the second eccentric transmission mechanism (8) to drive the first punch (5) and the second punch (9) to reciprocate up and down.

2. The double-punch cutting structure as described in claim 1, characterized in that, The rack (1) includes: Support base (11); A horizontal top plate (12) extends horizontally along the first direction (X) and is spaced apart above the support base (11); Several supporting columns (13) extend vertically (Z) and connect between the horizontal top plate (12) and the supporting base (11); The first mounting plate (14) and the second mounting plate (15) are spaced apart on the top surface of the horizontal top plate (12) in the first direction (X). The drive wheel (2) is mounted on the first mounting plate (14). The first eccentric shaft (3) passes between the first mounting plate (14) and the second mounting plate (15). The third mounting plate (16), the fourth mounting plate (17) and the fifth mounting plate (18) are arranged sequentially at intervals on the side of the first mounting plate (14) facing away from the second mounting plate (15) in the first direction (X), and are installed on the top surface of the horizontal top plate (12); The dual-punch cutting structure also includes: A connecting shaft (72) is inserted through the third mounting vertical plate (16), and one end of it is coaxially connected to the drive wheel (2); The second eccentric shaft (7) passes between the fourth mounting vertical plate (17) and the fifth mounting vertical plate (18), and one end of the second eccentric shaft (7) is coaxially connected to the other end of the connecting shaft (72) through a coupling (71).

3. The double-punch cutting structure as described in claim 2, characterized in that, The horizontal top plate (12) is provided with a first clearance hole (121) directly opposite the first eccentric shaft (3). The first clearance hole (121) is provided with a first guide structure (122) around its periphery. The first punch (5) passes through the first clearance hole (121) and is mounted on the first guide structure (122) in a lifting and lowering motion. The first eccentric transmission mechanism (4) includes: The first connecting rod (41) has a first bushing (411) at one end, and a first hinge hole (4111) matching the first eccentric shaft (3) is formed on the inner side of the first bushing (411). The other end of the first connecting rod (41) opposite to the first bushing (411) has a second hinge hole (412). The first hinge shaft (42) matches the second hinge hole (412) and is installed in the connecting rod insertion hole (51) located at one end of the first punch (5) facing the first eccentric shaft (3) and matching the shape of the first connecting rod (41); One end of the first connecting rod (41) is hinged to the first eccentric shaft (3) through the first hinge hole (4111), and the other end of the first connecting rod (41) is inserted into the connecting rod insertion hole (51) and hinged to the first hinge shaft (42) through the second hinge hole (412).

4. The double-punch cutting structure as described in claim 3, characterized in that, The horizontal top plate (12) is provided with a second clearance hole (123) directly opposite the second eccentric shaft (7), and a second guide structure (124) is provided around the second clearance hole (123); The second punch (9) includes: The punch body (91) is inserted into the second clearance hole (123) and is mounted on the second guide structure (124) in a lifting and lowering motion. A pair of mounting seats (92) are spaced apart at one end of the punch body (91) facing the second eccentric shaft (7); The second eccentric transmission mechanism (8) includes: Driven wheel (81) is eccentrically mounted on the second eccentric shaft (7); The second connecting rod (82) includes a connecting collar (821) and a second bushing (822) protruding from one end of the connecting collar (821). The inner side of the connecting collar (821) forms a third hinge hole (8211) that matches the driven wheel (81), and the inner side of the second bushing (822) forms a fourth hinge hole (8221). The second hinge shaft (83) matches the fourth hinge hole (8221) and passes between the pair of mounting seats (92); One end of the second link (82) is hinged to the driven wheel (81) through the third hinge hole (8211), and the other end of the second link (82) is hinged to the second hinge shaft (83) through the fourth hinge hole (8221).

5. The double-punch cutting structure as described in claim 3, characterized in that, The first mounting vertical plate (14), the second mounting vertical plate (15), and the third mounting vertical plate (16) are respectively provided with a first mounting bearing (141), a second mounting bearing (151), and a third mounting bearing (161). The drive wheel (2) is mounted on the first mounting bearing (141), the end of the first eccentric shaft (3) away from the drive wheel (2) is mounted on the second mounting bearing (151), and the connecting shaft (72) is mounted on the third mounting bearing (161). The fourth mounting plate (17) and the fifth mounting plate (18) are respectively provided with a fourth mounting bearing (171) and a fifth mounting bearing (181), and the second eccentric shaft (7) is mounted on the fourth mounting bearing (171) and the fifth mounting bearing (181).

6. The double-punch cutting structure as described in claim 4, characterized in that, A first bushing (31) matching the shape of the first eccentric shaft (3) is provided on the inner side of the first hinge hole (4111). The first hinge hole (4111) is hinged to the first eccentric shaft (3) through the first bushing (31). The first punch (5) is provided with a pair of bushing mounting holes (52) on both sides of the connecting rod insertion hole (51). The bushing mounting hole (52) is provided with a second bushing (521) that matches the shape of the first hinge shaft (42). The first hinge shaft (42) passes through the pair of second bushings (521).

7. The double-punch cutting structure as described in any one of claims 2-5, characterized in that, The driving device (6) includes: The drive unit (61) is mounted on the first mounting vertical plate (14); A drive wheel (62) is mounted on the output shaft (611) of the drive unit (61); A timing belt (63) is fitted between the drive wheel (62) and the driving wheel (2); The drive unit (61) is used to drive the output shaft (611) to rotate, so as to drive the drive wheel (62) to drive the synchronous belt (63) and the drive wheel (2) to rotate synchronously.

8. The double-punch cutting structure as described in claim 7, characterized in that, The drive unit (61) is a drive motor, and the first mounting plate (14) is also provided with a sixth mounting bearing (142), and the output shaft (611) is mounted on the sixth mounting bearing (142).

9. A punching system, characterized in that, Includes the double punching structure as described in any one of claims 1-8.

10. The punching system as described in claim 9, characterized in that, The bottom ends of the first punch (5) and the second punch (9) are respectively connected to the first punching die and the second punching die.

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