A width-adjustable folding knife device and bag opener

Abstract

The utility model discloses a width adjustable's folding knife device and bag opener, width adjustable's folding knife device includes base plate, first power source, second power source, first folding knife subassembly, second folding knife subassembly, first transmission subassembly and second transmission subassembly, first transmission subassembly includes with the output of first power source is connected and along the width direction extension's first lead screw, the first nut of first lead screw is covered, and the first transmission subassembly is connected in first nut and first folding knife subassembly, and is equipped with first guide component between first transmission subassembly and base plate, second transmission subassembly includes with the output of second power source is connected and along the width direction extension's second lead screw, the second nut of second lead screw is covered, and the second transmission subassembly is connected in second nut and second folding knife subassembly, and is equipped with second guide component between second transmission subassembly and base plate. Can improve the regulation efficiency to avoid the problem of low efficiency in prior art mode replacement.

Description

Technical Field

[0001] This utility model relates to the field of bag opening machine technology, and in particular to a folding knife device with adjustable width and a bag opening machine. Background Technology

[0002] A pocket-opening machine is a machine that uses a folding knife device to fold cut fabric and then sew it to form a pocket. Current pocket-opening machines use an upper folding knife device. The working principle of the upper folding knife device is as follows: when the entire upper folding knife device moves above the fabric, the lifting cylinder drives the four folding knives in four directions to descend to the four sides of the fabric. Simultaneously, the four horizontal cylinders actuate, folding the fabric, which is then clamped and sewn.

[0003] When the length and width dimensions of the pocket change, the operator first moves the upper folding knife device into the rectangular groove formed by the pocket, then loosens the fixing bolts of the horizontal cylinder seat on the device, and then pulls the folding knife module to align the folding knife with the four sides, fixes the horizontal cylinder seat, and resets the device to complete one mold changing operation on the folding knife device.

[0004] Completing a mold change operation involves numerous steps, which are tedious and time-consuming. After completion, the debugging personnel must fold the fabric to check if the machine has been properly debugged. If it fails, another mold change operation is required, resulting in low efficiency. Furthermore, this type of mold change operation demands a high level of practical experience and proficiency from the debugging personnel and is not universally applicable.

[0005] Therefore, how to avoid the problem of low mold-changing efficiency in the existing technology is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a folding knife device and a bag opening machine with adjustable width, which can avoid the problem of low mold changing efficiency in the prior art.

[0007] To achieve the above objectives, this utility model provides a width-adjustable folding knife device, including a base plate, a first power source, a second power source, a first folding knife assembly, a second folding knife assembly, a first transmission assembly, and a second transmission assembly. The first folding knife assembly and the second folding knife assembly are spaced apart in the width direction of the base plate. The first transmission assembly includes a first lead screw connected to the output end of the first power source and extending in the width direction, a first nut sleeved on the first lead screw, and a first transmission component connected to the first nut and the first folding knife assembly. A first guide component for guiding the first transmission component to move in the width direction is provided between the first transmission component and the base plate. The second transmission assembly includes a second lead screw connected to the output end of the second power source and extending in the width direction, a second nut sleeved on the second lead screw, and a second transmission component connected to the second nut and the second folding knife assembly. A second guide component for guiding the second transmission component to move in the width direction is provided between the second transmission component and the base plate.

[0008] In one possible implementation, the first transmission component includes a first base plate located above the substrate;

[0009] The first guidance component includes:

[0010] The first guide rail extends along the width direction and is fixedly connected to the substrate.

[0011] The first slider corresponds one-to-one with the first guide rail. The first slider is fixedly connected to the bottom of the first base plate, and the first slider slides in cooperation with the first guide rail.

[0012] In one possible implementation, the first transmission assembly further includes:

[0013] The first connecting plate is fixedly connected to the first nut;

[0014] The first vertical plate is fixedly connected to the first base plate;

[0015] The first cylinder includes a first cylinder body fixedly connected to a first connecting plate, and a first piston rod fixedly connected to a first vertical plate and extending in the width direction.

[0016] In one possible implementation, the first transmission assembly further includes:

[0017] The first fixing plate is fixedly connected to the first folding knife assembly;

[0018] The second cylinder includes a second cylinder body fixedly connected to the first vertical plate, and a second piston rod fixedly connected to the first fixed plate and extending along the height direction.

[0019] In one possible implementation, a third guide assembly is further provided between the first fixed plate and the first vertical plate, the third guide assembly comprising:

[0020] The third guide rail extends along the height direction and is fixedly connected to the side of the first vertical plate facing the first fixed plate.

[0021] The third slider corresponds one-to-one with the third guide rail. The third slider is fixedly connected to the side of the first fixed plate facing the first vertical plate, and the first slider slides in cooperation with the first guide rail.

[0022] In one possible implementation, the first folding knife assembly includes a first mounting plate and a first folding knife connected to the first mounting plate. The first mounting plate has a first strip hole, and the first fixing plate has a first connecting hole. A first fixing member passes through the first strip hole and connects to the first connecting hole to fix the first mounting plate and the first fixing plate together.

[0023] In one possible implementation, a first fixing component is also included, which includes two first bearing seats spaced apart in the width direction of the substrate, with the two ends of the first lead screw respectively inserted into the first bearing seats.

[0024] In one possible implementation, a second fixing component is further included, comprising two second bearing seats spaced apart in the width direction of the substrate, with the two ends of the second lead screw respectively inserted into the second bearing seats.

[0025] In one possible implementation, the first power source and the second power source are disposed on the same side of the substrate in the width direction.

[0026] Based on the above, this application also provides a bag opening machine, including the width-adjustable folding knife device of all the above embodiments.

[0027] Compared with the prior art, the technical solution provided by this utility model has at least the following beneficial effects: Both the first power source and the second power source are connected to the substrate. The output end of the first power source is connected to a first lead screw. When the output end of the first power source drives the first lead screw to rotate, it drives the first nut sleeved on the first lead screw to move in the extension direction of the first lead screw. The first transmission assembly connected to the first nut moves along the width direction of the substrate under the guidance of the first guide assembly, thereby driving the first folding blade assembly to move in the width direction of the substrate. The output end of the second power source is connected to a second lead screw. When the output end of the second power source drives the second lead screw to rotate, it drives the second nut sleeved on the second lead screw to move in the extension direction of the second lead screw, thereby driving the first folding blade assembly to move in the width direction of the substrate. The second transmission assembly, connected by two nuts, moves along the width direction of the substrate under the guidance of the second guide assembly, thereby driving the second folding blade assembly to move along the width direction of the substrate. The first power source and the second power source operate synchronously, controlling the rotation direction, number of rotations, and rotation angle of the first lead screw and the second lead screw, which can drive the first folding blade assembly and the second folding blade assembly to move closer to each other or further away from each other, so as to adjust the initial position of the first folding blade assembly and the second folding blade assembly in the width direction of the base. This is used to make the first folding blade assembly and the second folding blade assembly suitable for pockets of different widths, reducing the time for manually adjusting the position of the first folding blade assembly and the second folding blade assembly, improving adjustment efficiency, and avoiding the problem of low mold changing efficiency in the prior art. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 A schematic diagram of the adjustable-width folding knife device provided in an embodiment of this utility model;

[0030] Figure 2 This is a structural schematic diagram of the width-adjustable folding knife device provided in an embodiment of the present invention from another perspective.

[0031] in:

[0032] 100 - substrate, 110 - opening;

[0033] 200 - First Power Source;

[0034] 300 - Second power source;

[0035] 400 - First folding blade assembly; 410 - First mounting plate; 420 - First folding blade;

[0036] 500 - Second folding blade assembly; 510 - Second mounting plate; 520 - Second folding blade;

[0037] 610-First lead screw, 620-First nut, 630-First base plate, 640-First connecting plate, 650-First vertical plate, 660-First cylinder, 670-First fixing plate, 680-Second cylinder;

[0038] 710 - Second lead screw, 720 - Second nut, 730 - Second base plate, 740 - Second connecting plate, 750 - Second vertical plate, 760 - Third cylinder, 770 - Second fixing plate, 780 - Fourth cylinder;

[0039] 800 - First guide assembly, 810 - First guide rail, 820 - First slider;

[0040] 900 - Second guide assembly; 910 - Second guide rail; 920 - Second slider;

[0041] 1000 - Third guide assembly, 1010 - Third guide rail, 1020 - Third slider;

[0042] 1100 - First bearing housing;

[0043] 1200 - Fourth guide assembly, 1210 - Fourth guide rail, 1220 - Fourth slider;

[0044] 1300 - Second bearing housing. Detailed Implementation

[0045] 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.

[0046] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] In the description of this utility model, it should be understood that the terms "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0048] The purpose of this invention is to provide a folding knife device and a bag opening machine with adjustable width, which can avoid the problem of low mold changing efficiency in the prior art.

[0049] Please see Figure 1 and Figure 2 To achieve the above objectives, this utility model provides a width-adjustable folding knife device, including a base plate 100, a first power source 200, a second power source 300, a first folding knife assembly 400, a second folding knife assembly 500, a first transmission assembly, and a second transmission assembly. The first folding knife assembly 400 and the second folding knife assembly 500 are spaced apart in the width direction of the base plate 100, and the width direction of the base plate 100 coincides with the width direction of the rectangular groove formed by the pocket. The first transmission assembly includes a first lead screw 610 connected to the output end of the first power source 200 and extending along the width direction of the base plate 100, a first nut 620 sleeved on the first lead screw 610, and a first transmission assembly connected to the first nut 620 and the first folding knife assembly 400. A first guide assembly 800 is provided between the first transmission assembly and the base plate 100 to guide the first transmission assembly to move along the width direction of the base plate 100. The second transmission assembly includes a second lead screw 710 connected to the output end of the second power source 300 and extending along the width direction of the substrate 100, a second nut 720 sleeved on the second lead screw 710, and a second transmission component connected to the second nut 720 and the second folding knife assembly 500. A second guide component 900 for guiding the second transmission component to move along the width direction of the substrate 100 is provided between the second transmission component and the substrate 100.

[0050] The first power source 200 may be, but is not limited to, an electric motor. A first coupling is provided between the output end of the first power source 200 and the first lead screw 610. The first coupling is used to drive the first lead screw 610 to rotate around its own axis and to ensure the smooth operation of the first lead screw 610. The second power source 300 may be, but is not limited to, an electric motor. A second coupling is provided between the output end of the second power source 300 and the second lead screw 710. The second coupling is used to drive the second lead screw 710 to rotate around its own axis and to ensure the smooth operation of the second lead screw 710.

[0051] Both the first power source 200 and the second power source 300 are connected to the substrate 100. The output end of the first power source 200 is connected to a first lead screw 610. When the output end of the first power source 200 drives the first lead screw 610 to rotate, it drives the first nut 620 sleeved on the first lead screw 610 to move in the extension direction of the first lead screw 610. The first transmission component connected to the first nut 620 moves along the width direction of the substrate 100 under the guidance of the first guide component 800, thereby driving the first folding blade assembly 400 to move in the width direction of the substrate 100. The output end of the second power source 300 is connected to a second lead screw 710. When the output end of the second power source 300 drives the second lead screw 710 to rotate, it drives the second nut 720 sleeved on the second lead screw 710 to move in the extension direction of the second lead screw 710. The second transmission component connected to the second nut 720 moves along the width direction of the substrate 100 under the guidance of the second guide component 900, thereby driving the second folding blade assembly 500 to move in the width direction of the substrate 100. The first power source 200 and the second power source 300 operate synchronously, controlling the rotation direction, number of rotations, and rotation angle of the first lead screw 610 and the second lead screw 710. This drives the first folding knife assembly 400 and the second folding knife assembly 500 to move closer or further apart, adjusting their initial positions in the width direction of the base. This allows the first folding knife assembly 400 and the second folding knife assembly 500 to be suitable for pockets of different widths. When the pocket width changes, the distance between the first folding knife assembly 400 and the second folding knife assembly 500 can be adjusted without manual disassembly and reassembly of parts, reducing the time spent manually adjusting their positions. The angle through which the motor output rotates controls the rotation of the first lead screw 610 and the second lead screw, achieving high precision in adjusting the folding knife module and improving adjustment efficiency, thus avoiding the problem of low mold-changing efficiency in existing technologies. In addition, a display screen for outputting instructions can be added. The mold changing process of the first folding knife assembly 400 and the second folding knife assembly 500 can be carried out simultaneously by operating the display screen. Automatic adjustment replaces manual adjustment, which increases the automation level of the machine and reduces the labor intensity of the workers.

[0052] In one possible implementation, the first transmission assembly includes a first base plate 630 located above the substrate 100. The first guide assembly 800 includes a first guide rail 810 and a first slider 820. The first guide rail 810 extends along the width direction of the substrate 100 and is fixedly connected to the substrate 100. The first slider 820 corresponds one-to-one with the first guide rail 810 and is fixedly connected to the bottom of the first base plate 630, with the first slider 820 slidingly engaged with the first guide rail 810. Two first guide rails 810 may be provided, and the two first guide rails 810 are parallel and spaced apart. Correspondingly, the bottom of the first base plate 630 is provided with two spaced-apart first sliders 820, one first slider 820 being movably connected to one first guide rail 810, and the other first slider 820 being movably connected to the other first guide rail 810. When the first lead screw 610 rotates, the first nut 620 moves along the width direction of the substrate 100 under the guidance of the first guide assembly 800.

[0053] The second transmission assembly includes a second base plate 730 located above the substrate 100. The second guide assembly 900 includes a second guide rail 910 and a second slider 920. The second guide rail 910 extends along the width direction of the substrate 100 and is fixedly connected to the substrate 100. The second slider 920 corresponds one-to-one with the second guide rail 910 and is fixedly connected to the bottom of the second base plate 730, with the second slider 920 slidingly engaged with the second guide rail 910. Two second guide rails 910 can be provided, and the two second guide rails 910 are parallel and spaced apart. Correspondingly, the bottom of the second base plate 730 is provided with two spaced-apart second sliders 920. One second slider 920 is movably connected to one second guide rail 910, and the other second slider 920 is movably connected to the other second guide rail 910. When the second lead screw 710 rotates, the second nut 720 moves along the width direction of the substrate 100 under the guidance of the second guide assembly 900.

[0054] In one possible implementation, the first transmission assembly further includes a first connecting plate 640, a first vertical plate 650, and a first cylinder 660. The first connecting plate 640 includes a first plate body, a second plate body perpendicularly connected to the first plate body, and a third plate body perpendicularly connected to the second plate body. The first plate body and the third plate body are parallel and located on different sides of the second plate body. The first plate body of the first connecting plate 640 is fixedly connected to a first nut 620, and the first vertical plate 650 is fixedly connected to a first base plate 630. The first cylinder 660 includes a first cylinder body fixedly connected to the third plate body of the first connecting plate 640, and a first piston rod fixedly connected to the first vertical plate 650 and extending in the width direction. The first cylinder body and the first piston rod of the first cylinder 660 remain in a relatively stationary state, serving as a connector between the third plate body and the first vertical plate 650. Furthermore, once the third plate is in place, the first cylinder body and the first piston rod of the first cylinder 660 return to their active state, and the first piston rod can extend and retract relative to the first cylinder body to drive the first vertical plate 650 to move along the extension direction of the first piston rod.

[0055] Furthermore, the first transmission assembly also includes a first fixing plate 670 and a second cylinder 680. The first fixing plate 670 is fixedly connected to the first folding blade assembly 400. The second cylinder 680 includes a second cylinder body fixedly connected to the top of the first vertical plate 650, and a second piston rod fixedly connected to the first fixing plate 670 and extending in the height direction. The second piston rod is telescopic relative to the second cylinder body to drive the first fixing plate 670 to move relative to the first vertical plate 650 along the extension direction of the second piston rod, thereby driving the first folding blade assembly 400 to move in the height direction. The base plate 100 is provided with an opening 110 extending in the height direction for the first fixing plate 670 and the second fixing plate 770 (described below) to pass through when moving in the height direction, and to drive the first folding blade 420 and the second folding blade 520 (described below) located below the base plate 100 to move in the height direction.

[0056] In one possible implementation, the second transmission assembly further includes a second connecting plate 740, a second vertical plate 750, and a third cylinder 760. The second connecting plate 740 includes a fourth plate body, a fifth plate body perpendicularly connected to the fourth plate body, and a sixth plate body perpendicularly connected to the fifth plate body. The fourth and sixth plate bodies are parallel and located on different sides of the fifth plate body. The fourth plate body of the second connecting plate 740 is fixedly connected to a second nut 720, and the second vertical plate 750 is fixedly connected to a second base plate 730. The third cylinder 760 includes a third cylinder body fixedly connected to the sixth plate body of the second connecting plate 740, and a third piston rod fixedly connected to the second vertical plate 750 and extending in the width direction. The third cylinder body and the third piston rod of the third cylinder 760 remain in a relatively stationary state, serving as a connector between the sixth plate body and the second vertical plate 750. Furthermore, once the sixth plate is in place, the third cylinder and the third piston rod of the third cylinder 760 return to their active state. The third piston rod can extend and retract relative to the third cylinder to drive the second vertical plate 750 to move along the extension direction of the third piston rod.

[0057] Furthermore, the second transmission assembly also includes a second fixed plate 770 and a fourth cylinder 780, with the second fixed plate 770 fixedly connected to the second folding knife assembly 500. The fourth cylinder 780 includes a fourth cylinder body fixedly connected to the top of the second vertical plate 750, and a fourth piston rod fixedly connected to the second fixed plate 770 and extending in the height direction. The fourth piston rod is telescopic relative to the fourth cylinder body to move the second fixed plate 770 relative to the second vertical plate 750 along the extension direction of the fourth piston rod, thereby moving the second folding knife assembly 500 in the height direction.

[0058] In one possible implementation, a third guide assembly 1000 is provided between the first fixed plate 670 and the first vertical plate 650. The third guide assembly 1000 includes a third guide rail 1010 and a third slider 1020. The third guide rail 1010 extends along the height direction and is fixedly connected to the side of the first vertical plate 650 facing the first fixed plate 670. The third slider 1020 corresponds one-to-one with the third guide rail 1010. The third slider 1020 is fixedly connected to the side of the first fixed plate 670 facing the first vertical plate 650. The first slider 820 is slidably engaged with the first guide rail 810. There can be two third guide rails 1010, which are parallel and spaced apart. Correspondingly, the first fixed plate 670 is connected to two spaced third sliders 1020. One third slider 1020 is movably connected to one third guide rail 1010, and the other third slider 1020 is movably connected to the other third guide rail 1010, for guiding the movement of the first fixed plate 670. A fourth guide assembly 1200 is also provided between the second fixed plate 770 and the second vertical plate 750. The fourth guide assembly 1200 includes a fourth guide rail 1210 and a fourth slider 1220. The fourth guide rail 1210 extends along the height direction and is fixedly connected to the side of the second vertical plate 750 facing the second fixed plate 770. The fourth slider 1220 corresponds one-to-one with the fourth guide rail 1210. The fourth slider 1220 is fixedly connected to the side of the second fixed plate 770 facing the second vertical plate 750. The second slider 920 is slidably engaged with the second guide rail 910. There can be two fourth guide rails 1210, and the two fourth guide rails 1210 are parallel and spaced apart. Correspondingly, the second fixed plate 770 is connected to two spaced fourth sliders 1220. One fourth slider 1220 is movably connected to one fourth guide rail 1210, and the other fourth slider 1220 is movably connected to the other fourth guide rail 1210, which is used to guide the movement of the second fixed plate 770.

[0059] In one possible implementation, the first folding knife assembly 400 includes a first mounting plate 410 and a first folding knife 420 connected to the first mounting plate 410. The first mounting plate 410 has a first slotted hole, and the first fixing plate 670 has a first connecting hole. A first fixing member passes through the first slotted hole and connects to the first connecting hole to fix the first mounting plate 410 and the first fixing plate 670 together. The number of first slotted holes is set to two, and the number of first connecting holes is set to four, with two first connecting holes corresponding to one first slotted hole. Two second connecting holes corresponding to one first slotted hole are spaced apart in the height direction. The four first fixing members connect the first mounting plate 410 and the first fixing plate 670, resulting in better stability. The first connecting hole can be a threaded hole, and the first fixing member can be a screw. Loosening the first fixing member allows the first mounting plate 410 to move in the height direction to adjust its position. After adjustment, tightening the first fixing member fixes the first mounting plate 410 and the first fixing plate 670.

[0060] In one possible implementation, the second folding knife assembly 500 includes a second mounting plate 510 and a second folding knife 520 connected to the second mounting plate 510. The second mounting plate 510 has a second strip-shaped hole, and the second fixing plate 770 has a second connecting hole. A second fixing member passes through the second strip-shaped hole and connects to the second connecting hole to fix the second mounting plate 510 and the second fixing plate 770 together. The number of second strip-shaped holes is set to two, and the number of second connecting holes is set to four, with two second connecting holes corresponding to one second strip-shaped hole. The two second connecting holes corresponding to one second strip-shaped hole are spaced apart in the height direction. The four second fixing members connect the second mounting plate 510 and the second fixing plate 770, resulting in better stability. The second connecting hole can be a threaded hole, and the second fixing member can be a screw. Loosening the second fixing member allows the second mounting plate 510 to move in the height direction to adjust its position. After adjustment, tightening the second fixing member fixes the second mounting plate 510 and the second fixing plate 770.

[0061] In one possible implementation, the device further includes a first fixing component and a second fixing component. The first fixing component includes two first bearing seats 1100 spaced apart in the width direction of the substrate 100. Both ends of the first lead screw 610 are respectively inserted into the first bearing seats 1100, providing axial limiting for the first lead screw 610 while facilitating its rotation around its own axis. The second fixing component includes two second bearing seats 1300 spaced apart in the width direction of the substrate 100, with both ends of the second lead screw 710 respectively inserted into the second bearing seats 1300. This provides axial limiting for the second lead screw 710 while facilitating its rotation around its own axis. The first power source 200 and the second power source 300 are located on the same side of the substrate 100 in the width direction to reduce the overall size of the width-adjustable folding knife device in its own width direction.

[0062] Based on the above, this application also provides a bag opening machine, including the width-adjustable folding knife device of all the above embodiments. The bag opening machine also has all the beneficial effects of the width-adjustable folding knife device. The remaining structure of the bag opening machine can be referred to the prior art, and will not be described in detail here.

[0063] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0065] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A folding knife device with adjustable width, characterized in that, The system includes a substrate (100), a first power source (200), a second power source (300), a first folding blade assembly (400), a second folding blade assembly (500), a first transmission assembly, and a second transmission assembly. The first folding blade assembly (400) and the second folding blade assembly (500) are spaced apart in the width direction of the substrate (100). The first transmission assembly includes a first lead screw (610) connected to the output end of the first power source (200) and extending along the width direction, a first nut (620) sleeved on the first lead screw (610), and a first transmission group connected to the first nut (620) and the first folding blade assembly (400). The first transmission assembly is provided with a first guide assembly (800) between the first transmission assembly and the base plate (100) for guiding the first transmission assembly to move along the width direction; the second transmission assembly includes a second lead screw (710) connected to the output end of the second power source (300) and extending along the width direction, a second nut (720) sleeved on the second lead screw (710), and a second transmission assembly connected to the second nut (720) and the second folding knife assembly (500); the second transmission assembly is provided with a second guide assembly (900) between the second transmission assembly and the base plate (100) for guiding the second transmission assembly to move along the width direction.

2. The width-adjustable folding knife device according to claim 1, characterized in that, The first transmission assembly includes a first base plate (630) located above the substrate (100). The first guide component (800) includes: The first guide rail (810) extends along the width direction and is fixedly connected to the substrate (100). The first slider (820) corresponds one-to-one with the first guide rail (810). The first slider (820) is fixedly connected to the bottom of the first base plate (630), and the first slider (820) slides in cooperation with the first guide rail (810).

3. The width-adjustable folding knife device according to claim 2, characterized in that, The first transmission assembly further includes: The first connecting plate (640) is fixedly connected to the first nut (620); The first vertical plate (650) is fixedly connected to the first base plate (630); The first cylinder (660) includes a first cylinder body fixedly connected to the first connecting plate (640) and a first piston rod fixedly connected to the first vertical plate (650) and extending along the width direction.

4. The width-adjustable folding knife device according to claim 3, characterized in that, The first transmission assembly further includes: The first fixing plate (670) is fixedly connected to the first folding knife assembly (400); The second cylinder (680) includes a second cylinder body fixedly connected to the first vertical plate (650) and a second piston rod fixedly connected to the first fixed plate (670) and extending in the height direction.

5. The width-adjustable folding knife device according to claim 4, characterized in that, A third guide assembly (1000) is further provided between the first fixing plate (670) and the first vertical plate (650), the third guide assembly (1000) comprising: The third guide rail (1010) extends along the height direction and is fixedly connected to the side of the first vertical plate (650) facing the first fixed plate (670). The third slider (1020) corresponds one-to-one with the third guide rail (1010). The third slider (1020) is fixedly connected to the side of the first fixed plate (670) facing the first vertical plate (650). The first slider (820) and the first guide rail (810) are in sliding cooperation.

6. The width-adjustable folding knife device according to claim 4, characterized in that, The first folding knife assembly (400) includes a first mounting plate (410) and a first folding knife (420) connected to the first mounting plate (410). The first mounting plate (410) is provided with a first strip hole, and the first fixing plate (670) is provided with a first connecting hole. A first fixing member passes through the first strip hole and connects to the first connecting hole to fix the first mounting plate (410) and the first fixing plate (670) together.

7. The width-adjustable folding knife device according to any one of claims 1 to 6, characterized in that, It also includes a first fixing component, which includes two first bearing seats (1100) spaced apart in the width direction of the substrate (100), and the two ends of the first lead screw (610) are respectively inserted into the first bearing seats (1100).

8. The width-adjustable folding knife device according to any one of claims 1 to 6, characterized in that, It also includes a second fixing component, which includes two second bearing seats (1300) spaced apart in the width direction of the substrate (100), and the two ends of the second lead screw (710) are respectively inserted into the second bearing seats (1300).

9. The width-adjustable folding knife device according to any one of claims 1 to 6, characterized in that, The first power source (200) and the second power source (300) are disposed on the same side of the substrate (100) in the width direction.

10. A bag-opening machine, characterized in that, Includes the width-adjustable folding knife device as described in any one of claims 1-9.

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