The thread-cutting device of a sock machine

Abstract

This utility model belongs to the field of sock knitting technology, and specifically relates to a thread-cutting device for sock knitting machines, which solves the problem of low transmission efficiency. The thread-cutting device of this sock knitting machine includes a blade holder, on which scissors are mounted. The scissors include a fixed blade and a movable blade. The fixed blade is mounted on the blade holder, and a moving guide mechanism is provided between the movable blade and the fixed blade. The movable blade is connected to a movable blade drive mechanism, which can drive the movable blade to approach or move away from the fixed blade, and enables the blades of the movable blade and the fixed blade to engage in an interlocking motion to achieve cutting. This achieves the effect of cutting thread through the translational motion of the movable blade relative to the fixed blade, thus improving transmission efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of sock machine technology, and specifically relates to a thread-cutting device for a sock machine. Background Technology

[0002] During the knitting process of a sock machine, a guide needle guides and weaves a chain of stitches. The stitches emerge from the end of the guide needle, creating a continuous sewing effect. In order to cut the stitches in a timely manner, the equipment is often equipped with a corresponding cutting device.

[0003] In existing technologies, some shearing devices achieve the specific shearing action using X-shaped scissors. The blades are driven by a drive structure to rotate reciprocally, cutting the wire when they close. However, since the blades rotate, the drive end of the drive structure requires a corresponding transmission structure to achieve the arc-shaped path, which is detrimental to improving transmission efficiency and also increases structural complexity. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a thread-cutting device for a sock knitting machine.

[0005] To achieve the innovative objectives of this utility model, the following technical solutions can be used:

[0006] A thread-cutting device for a sock machine includes a blade holder with scissors mounted on it. The scissors include a fixed blade and a movable blade. The fixed blade is mounted on the blade holder, and a moving guide mechanism is provided between the movable blade and the fixed blade. The movable blade is connected to a movable blade driving mechanism, which can drive the movable blade to approach or move away from the fixed blade, and can cause the blades of the movable blade and the fixed blade to engage in an interlocking motion to achieve cutting.

[0007] This wire cutting device uses a moving blade and a fixed blade to cut wire. The fixed blade is fixed to the blade holder, and the cutting planes of the moving blade and the fixed blade slide in contact. A moving blade drive mechanism drives the moving blade to reciprocate relative to the fixed blade, and a moving guide mechanism limits the movement path of the moving blade. The blades of the moving blade and the fixed blade interlock to achieve an effective cutting action. Furthermore, the moving guide mechanism is configured to constrain the movement trajectory of the moving blade, ensuring that the movement path of any point on the moving blade relative to the fixed blade is not a rotation around a fixed axis. Preferably, the movement of the moving blade relative to the fixed blade is a translational motion.

[0008] In the above-mentioned thread-cutting device of the sock machine, the moving guide mechanism includes N first strip-shaped limiting grooves provided on the moving blade body, and N≥1. The extending direction of the first strip-shaped limiting groove is consistent with the moving direction of the moving blade body relative to the fixed blade body. A first guide body that can slide along the length direction of the first strip-shaped limiting groove is provided in the first strip-shaped limiting groove. The first guide body is fixed on the fixed blade handle of the fixed blade body.

[0009] The first strip-shaped limiting groove preferably penetrates the moving tool holder, and its length direction is adapted to the sliding direction of the moving tool body. The first guide body slides within the first strip-shaped limiting groove, and its outer diameter is slightly smaller than the width of the groove, thereby guiding the movement path of the moving tool body. Multiple first strip-shaped limiting grooves and first guide bodies can be provided. These first strip-shaped limiting holes can be arranged in various ways, such as transverse distribution or longitudinal distribution, but their length direction is consistent, used to achieve movement guidance and anti-rotation limiting. Of course, when only one set of first strip-shaped limiting grooves and first guide bodies is provided, the cross-sectional shape of the first guide body is preferably, but not limited to, a square or rectangle, that is, it has at least two parallel long sides, which slide in contact with the long groove wall of the first strip-shaped limiting groove.

[0010] As an optimization, the tool holder is also provided with an anti-disengagement screw located on the side of the moving tool handle. The anti-disengagement screw is threaded into the threaded hole of the tool holder, and the inner end face of the screw head is in contact with the moving tool handle to prevent the moving tool body from disengaging from the moving guide surface.

[0011] In the above-mentioned thread-cutting device of the sock machine, the fixed blade body and / or blade holder are provided with a movable guide surface that can guide the moving blade body. The movable guide surface is linear or arc-shaped, and the moving blade body can move linearly or arc-shaped along the movable guide surface.

[0012] The inner side of the moving blade is slidably connected to the moving guide surface, and can slide along the moving guide surface. The shape of the inner side matches the moving guide surface. Both can be straight or curved. When it is straight, the moving blade can move in a straight line. When it is curved, the moving blade can move in a curved shape. Of course, the cutting surfaces of the moving blade and the fixed blade are also matched in a straight line or a curved shape to ensure that the moving blade can smoothly cut the wire when it moves relative to the fixed blade.

[0013] In the above-mentioned thread-cutting device of the sock machine, the outer end of the first guide body is provided with a first cap that can prevent the moving blade from disengaging along the axial direction of the first guide body.

[0014] The outer diameter of the first stop cap is larger than the width of the corresponding first strip-shaped limiting groove, thereby limiting the moving tool in the thickness direction. Of course, this limitation allows the moving tool body to slide on the tool holder.

[0015] In the above-mentioned thread-cutting device of the sock machine, the moving guide mechanism includes any one or more of the following: a slider rail unit, a bearing optical shaft unit, or a cross roller guide rail disposed between the moving blade body and the fixed blade body. The moving blade body is capable of linear or arc-shaped movement.

[0016] As another feasible solution, the moving cutter body can also achieve a sliding connection with the fixed cutter body through a slider-rail unit, a bearing optical axis unit, and a crossed roller guide. The length directions of the slide rail, the bearing, and the guide rail are matched with the moving direction of the moving cutter body; linear motion is linear, and arc motion is arc-shaped. The specific structures of the slider-rail unit, the bearing optical axis unit, and the crossed roller guide are common knowledge and will not be elaborated upon.

[0017] In the aforementioned thread-cutting device for sock machines, the moving blade body is connected to the moving blade drive mechanism via a connector, and a secondary guide structure is provided between the connector and the blade holder.

[0018] The connector is equivalent to an extension of the moving tool holder of the moving tool body. It is used to connect the moving tool body and the moving tool drive mechanism and has a transmission function. The secondary guide structure is used to guide the movement of the connector.

[0019] In the above-mentioned thread-cutting device of the sock machine, the secondary guide structure includes a guide groove disposed between the connector and the blade holder, and the extension direction of the guide groove is consistent with the moving direction of the moving blade body relative to the fixed blade body.

[0020] And / or, the secondary guide structure includes M second strip-shaped limiting grooves provided on the connector, M≥1, a second guide body passing through the second strip-shaped limiting groove, the second guide body being fixed on the tool holder, the extension direction of the second strip-shaped limiting groove being consistent with the movement direction of the moving tool body relative to the fixed tool body, and a second plug cap being provided at the outer end of the second guide body to prevent the connector from detaching along the axial direction of the second guide body.

[0021] The secondary guide structure can be similar to a sliding guide mechanism, where the second guide body slides within the second strip-shaped limiting groove to guide and limit the movement of the connecting member. The second strip-shaped limiting groove is parallel or collinear with the length direction of the first strip-shaped limiting groove. Similarly, when only one set of second strip-shaped limiting grooves and second guide bodies is provided, the cross-sectional shape of the second guide body is preferably, but not limited to, a square or rectangle, i.e., it has at least two parallel long sides that slide in contact with the long groove wall of the second strip-shaped limiting groove. Furthermore, a recessed guide groove can also be provided on the tool holder, where the connecting member slides within the guide groove, with both widths adapted to achieve guiding and limiting. The second cap functions similarly to the first cap, used to limit the connecting member in the thickness direction.

[0022] In the aforementioned thread-cutting device of the sock machine, one end of the connector is connected to the moving blade handle via a fitting structure, and the other end is connected to the driving end of the linear actuator.

[0023] The interlocking structure is used to connect the connector and the moving tool holder, and the connection is flexible and detachable.

[0024] In the above-mentioned thread-cutting device of the sock machine, the fitting structure includes a fitting opening provided on the moving blade handle, wherein the outer end of the fitting opening is smaller than the inner end, and one end of the connector is provided with an insert embedded in the fitting opening, and the insert is adapted to the fitting opening.

[0025] The moving tool holder and the connecting part are respectively provided with matching shaped slots and inserts. The inserts can be in the shape of a triangle or a circle, which is smaller on the outside and larger on the inside. The inserts are embedded in the slots along the thickness direction to achieve axial positioning.

[0026] In the above-mentioned thread-cutting device for sock machines, the moving blade drive mechanism includes a linear actuator. One end of a guide rod is fixed on the blade holder. The guide rod passes through the guide hole of the slide block, and the length direction of the guide rod is consistent with the moving trajectory of the moving blade body. The linear actuator is provided between the slide block and the blade holder.

[0027] The connector is arranged parallel to the side of the linear actuator. The slide is used for synchronous connection between the drive end of the linear actuator and the connector. The guide rod passes through the guide hole of the slide and is fixed to the tool holder to guide the movement of the slide. Moreover, the lower end of the guide rod has a large head with an outer diameter larger than the guide hole to limit the maximum extension distance of the slide. To reduce wear and resistance, a linear bearing can also be installed between the guide hole and the guide rod.

[0028] Furthermore, the linear actuator can be an independent structure fixed to the tool holder. When the moving tool body moves linearly, the lower end of the output shaft of the linear actuator is fixedly connected to the slide. When it moves in an arc, the mounting end and the driving end of the linear actuator are hinged together, ensuring the arc movement of the moving tool body while driving extension and retraction. Of course, the extension direction of the guide hole and guide rod is adapted to the moving path of the moving tool body, and can be linear or arc-shaped. Specifically, the linear actuator can be a structure such as a cylinder, electric cylinder, or lead screw drive assembly.

[0029] As an optimization, the linear actuator can also be an integral structure mounted on the tool holder, including a first cylinder chamber integrally formed on the tool holder. A piston is disposed within the first cylinder chamber, and a piston rod is connected to the piston. One end of the piston rod extends out of the first cylinder chamber, which is the driving end of the linear actuator. Both ends of the first cylinder chamber are connected to first air inlet / outlet ports, or one end of the first cylinder chamber is connected to the first air inlet / outlet port, and a piston return elastic element is disposed between the other end and the piston. The first air inlet / outlet ports are used to connect to a high-pressure gas supply device. When the moving tool body moves linearly, the driving end is fixedly connected to the slide. When it moves in an arc, the guide hole is set to a strip shape, and its length direction is parallel or coplanar with the plane of the arc movement path. The driving end passes through the guide hole and can slide adaptively along the guide hole. The driving end is provided with two annular limiting surfaces that slide against the top and bottom surfaces of the slide, respectively. These annular limiting surfaces can be achieved, for example, by a radially extending annular limiting surface at the inner end of the driving end and a limiting nut threadedly connected to the outer end of the driving end.

[0030] In the above-mentioned thread-cutting device of the sock machine, the lower part of the blade holder is provided with a horizontally extending swing hole, one end of the swing rod is provided in the swing hole, the blade holder is provided with a telescopic driver at the axis away from the swing rod, and the blade holder is also provided with a connecting part for connecting the blade holder reset elastic element.

[0031] A swing rod is inserted and fixed in the swing hole of the blade holder by a set screw. The swing rod can be inserted and connected to the corresponding part of the sock machine. The blade holder can rotate around the swing rod to control the entry and exit of the cutting edge between the moving blade and the fixed blade. The blade holder is provided with a connecting part, which can be ring-shaped or hook-shaped, etc., to connect the blade holder reset elastic element, so that the blade holder has an elastic tendency to swing to one side. The blade holder reset elastic element can be a tension spring. The telescopic actuator is used to overcome the elastic force and make the blade holder move to the other side to control the entry and exit of the cutting edge.

[0032] As an optimization, the telescopic actuator includes a telescopic rod connecting blind hole disposed on the blade holder. The inner end of the telescopic rod is slidably connected within the telescopic rod connecting blind hole. A circumferential sealing assembly is provided between the telescopic rod and the telescopic rod connecting blind hole. A second cylinder chamber is formed between the inner end face of the telescopic rod and the bottom of the telescopic rod connecting blind hole. The second cylinder chamber is connected to a second air inlet / outlet port, which is also used to connect a high-pressure gas supply device. The outer end of the telescopic rod extends out of the telescopic rod connecting blind hole and abuts against the contact surface on the sock machine. To further prevent slippage, an anti-slip ring is detachably provided at the opening of the telescopic rod connecting blind hole. The outer diameter of the sliding telescopic section of the telescopic rod is adapted to the inner diameter of the telescopic rod connecting blind hole, but smaller than the inner diameter of the anti-slip ring.

[0033] In the above-mentioned thread-cutting device of the sock machine, the blade of the moving blade and the blade of the fixed blade are arranged in a non-parallel manner, forming a gradually narrowing open slit with a larger outer end and a smaller inner end. The moving blade achieves progressive engagement from the inner end to the outer end of the slit during the sliding cutting process. The inner end of the blade of the moving blade or the blade of the fixed blade is provided with a thread stop.

[0034] The blades of the moving and fixed blades are basically opposite each other, with an included angle between them. This included angle forms a slit, which is wider at the outside and narrower at the inside, ensuring accurate entry of the wire. During the cutting action, the moving blade moves relative to the fixed blade, and the two blades gradually close together, achieving effective cutting. When cutting multiple wires, they can be cut sequentially, ensuring a good cutting effect. Furthermore, a wire stop is located at the inner end of the slit, forming a wire-blocking surface that opens outwards from the slit, used to block and limit the deepest point of the wire entering the slit.

[0035] In the aforementioned thread-cutting device of the sock machine, the fixed blade body is fixed to the blade holder by a detachable structure.

[0036] The fixed tool body and the tool holder are flexibly detachable, making them easy to disassemble and replace. The upper end of the guide groove of the tool holder is provided with a fixed tool mounting groove recessed into the bottom of the groove. The fixed tool shank of the fixed tool body is embedded in the fixed tool mounting groove, and the plate surface of the tool body is flush with the bottom surface of the guide groove. The detachable structure includes a fixed tool fixing bolt, which passes through the bottom of the fixed tool mounting groove from the back and is screwed to the screw hole on the fixed tool body at the front end.

[0037] As an optimization, the moving and fixed blades are L-shaped, including a vertically arranged handle portion and a cutting edge portion.

[0038] Compared with the prior art, the present invention has the following main advantages:

[0039] 1. In this wire shearing device, the fixed blade body is fixed on the blade holder, and the shearing planes of the moving blade body and the fixed blade body slide in contact. The moving blade drive mechanism drives the moving blade body to reciprocate relative to the fixed blade body, and the moving guide mechanism limits the movement path of the moving blade body. The blades of the moving blade body and the fixed blade body intersect to achieve an effective shearing action. Furthermore, the moving guide mechanism is configured to constrain the movement trajectory of the moving blade body, so that the movement path of any point on the moving blade body relative to the fixed blade body is not a rotation about a fixed axis.

[0040] 2. The first guide body slides within the first strip-shaped limiting groove to guide the movement path of the moving cutter body.

[0041] 3. The inner side of the moving cutter body is slidably connected to the moving guide surface, and can slide along the moving guide surface. The moving guide surface can be straight or curved. When it is straight, the moving cutter body can move in a straight line. When it is curved, the moving cutter body can move in a curved shape.

[0042] 4. The connector is used to connect the moving cutter body and the moving cutter drive mechanism, and has a transmission function. The secondary guide structure is similar to a sliding guide mechanism, which guides and limits the movement of the connector.

[0043] 5. The interlocking structure is used to connect the connector and the moving tool holder, and the connection is flexible and detachable.

[0044] 6. The connector is arranged parallel to the side of the linear actuator. The slide is used for the synchronous connection between the drive end of the linear actuator and the connector. The guide rod passes through the guide hole of the slide and is fixed on the tool holder to guide the movement of the slide.

[0045] 7. The swing rod is fixed in the swing hole of the tool holder. The tool holder can rotate around the swing rod to control the entry and exit of the cutting edge between the moving and fixed blades. The tool holder is provided with a connecting part to connect the tool holder reset elastic element, so that the tool holder has an elastic tendency to swing to one side. The telescopic driver is used to overcome the elastic force and make the tool holder move to the other side to control the entry and exit of the cutting edge.

[0046] 8. The blades of the moving blade and the fixed blade are basically opposite each other, and there is an angle between the two blades. The cutting slit is formed within this angle. The cutting slit is larger on the outside and smaller on the inside to ensure accurate entry of the wire. When cutting multiple wires, the two blades gradually close together to cut the wires in sequence and ensure the cutting effect. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure from the front view (Example 1);

[0048] Figure 2 This is a schematic diagram of the overall structure from a rear view (Example 1);

[0049] Figure 3 This is a cross-sectional schematic diagram through the first cylinder chamber and the second cylinder chamber (Example 1);

[0050] Figure 4 This is a schematic diagram of the tool holder and its assembly with the fixed tool body (Example 1);

[0051] Figure 5 This is a cross-sectional view taken along the length of the connector (Example 2).

[0052] In the diagram, 1 is the blade holder, 2 is the scissors, 3 is the fixed blade body, 4 is the moving blade body, 5 is the moving guide mechanism, 6 is the moving blade drive mechanism, 7 is the first strip-shaped limiting groove, 8 is the first guide body, 9 is the fixed blade handle, 10 is the moving guide surface, 11 is the first cap, 12 is the moving blade handle, 13 is the anti-loosening screw, 14 is the threaded hole, 15 is the screw head, 16 is the connector, 17 is the secondary guide structure, 18 is the guide groove, 19 is the second strip-shaped limiting groove, 20 is the second guide body, 21 is the second cap, 22 is the interlocking structure, and 23 is the linear actuator. 24. Insert, 25. Linear bearing, 26. Insert, 27. Guide rod, 28. Slide, 29. Guide hole, 30. Swing hole, 31. Swing rod, 32. Telescopic actuator, 33. Connecting part, 34. Cutting end, 35. Wire stop, 36. Detachable structure, 37. First cylinder chamber, 38. Piston, 39. Piston rod, 40. First air inlet / outlet port, 41. Piston return elastic element, 42. Telescopic rod connecting blind hole, 43. Telescopic rod, 44. Circumferential sealing assembly, 45. Second cylinder chamber, 46. Second air inlet / outlet port. Detailed Implementation

[0053] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0054] Example 1

[0055] Specific implementation examples Figures 1-4 As shown, the thread-cutting device of this sock machine includes a blade holder 1, on which scissors 2 are mounted. The scissors 2 include a fixed blade body 3 and a movable blade body 4. The fixed blade body 3 is mounted on the blade holder 1. A moving guide mechanism 5 is provided between the movable blade body 4 and the fixed blade body 3. The movable blade body 4 is connected to a movable blade drive mechanism 6. The movable blade drive mechanism 6 can drive the movable blade body 4 to approach or move away from the fixed blade body 3, and can make the blade of the movable blade body 4 and the blade of the fixed blade body 3 interlock and engage to achieve cutting.

[0056] Specifically, this wire cutting device uses a moving blade 4 and a fixed blade 3 to cut the wire. The fixed blade 3 is fixed to the blade holder 1, and the cutting planes of the moving blade 4 and the fixed blade 3 slide in contact. The moving blade drive mechanism 6 drives the moving blade 4 to reciprocate relative to the fixed blade 3. The moving guide mechanism 5 limits the movement path of the moving blade 4. The blades of the moving blade 4 and the fixed blade 3 intersect to achieve an effective cutting action. Furthermore, the moving guide mechanism 5 is configured to constrain the movement trajectory of the moving blade 4, so that the movement path of any point on the moving blade 4 relative to the fixed blade 3 is not a rotation around a fixed axis. The preferred movement state of the moving blade 4 relative to the fixed blade 3 is translational motion.

[0057] like Figure 1 , Figure 3 , Figure 4As shown, the moving guide mechanism 5 includes a first strip-shaped limiting groove 7 disposed on the moving cutter body 4. The extending direction of the first strip-shaped limiting groove 7 is consistent with the moving direction of the moving cutter body 4 relative to the fixed cutter body 3. A first guide body 8 is disposed in the first strip-shaped limiting groove 7 and can slide along the length direction of the first strip-shaped limiting groove 7. The first guide body 8 is fixed on the fixed handle 9 of the fixed cutter body 3. A first cap 11 is disposed at the outer end of the first guide body 8 to prevent the moving cutter body 4 from detaching axially along the first guide body 8. The fixed cutter body 3 and the tool holder 1 are provided with a moving guide surface 10 for guiding the moving cutter body 4. The moving guide surface 10 is linear, and the moving cutter body 4 can move linearly along the moving guide surface 10. An anti-detachment screw 13 is also disposed on the tool holder 1, located on the side of the moving handle 12. The anti-detachment screw 13 is threaded into the threaded hole 14 of the tool holder 1, and the inner end face of the screw head 15 is in contact with the moving handle 12.

[0058] Specifically, the first strip-shaped limiting groove 7 penetrates the movable tool holder 12, and its length direction is adapted to the sliding direction of the movable tool body 4. The first guide body 8 slides within the first strip-shaped limiting groove 7, and its outer diameter is slightly smaller than the width of the groove, thus guiding the movement path of the movable tool body 4. The outer diameter of the first cap 11 is larger than the width of the corresponding first strip-shaped limiting groove 7, thus limiting the movable tool in the thickness direction. Of course, this limitation allows the movable tool body 4 to slide on the tool holder 1. The inner surface of the movable tool body 4 is slidably connected to the moving guide surface 10, and can slide along the moving guide surface 10. The shape of the inner surface matches the moving guide surface 10, and both are straight, enabling the linear movement of the movable tool body 4. The anti-disengagement screw 13 is used to prevent the movable tool body 4 from disengaging from the moving guide surface 10.

[0059] like Figure 1 , Figure 3 , Figure 4 As shown, the moving cutter body 4 is connected to the moving cutter drive mechanism 6 via a connector 16. A secondary guide structure 17 is provided between the connector 16 and the tool holder 1. The secondary guide structure 17 includes a guide groove 18 disposed between the connector 16 and the tool holder 1, the extension direction of the guide groove 18 being consistent with the movement direction of the moving cutter body 4 relative to the fixed cutter body 3. The secondary guide structure 17 also includes two second strip-shaped limiting grooves 19 disposed on the connector 16, with a second guide body 20 passing through the second strip-shaped limiting groove 19. The second guide body 20 is fixed on the tool holder 1, the extension direction of the second strip-shaped limiting groove 19 being consistent with the movement direction of the moving cutter body 4 relative to the fixed cutter body 3, and a second cap 21 is provided at the outer end of the second guide body 20 to prevent the connector 16 from disengaging along the axial direction of the second guide body 20.

[0060] Specifically, the connecting member 16 is equivalent to an extension of the moving tool holder 12 of the moving tool body 4, used to connect the moving tool body 4 and the moving tool drive mechanism 6, and has a transmission function. The secondary guide structure 17 is used to guide the movement of the connecting member 16. The second guide body 20 slides in the second strip-shaped limiting groove 19 to guide and limit the movement of the connecting member 16. The second strip-shaped limiting groove 19 is aligned with the length direction of the first strip-shaped limiting groove 7. The second cap 21 has a similar function to the first cap 11, used to limit the connecting member 16 in the thickness direction.

[0061] like Figure 1 As shown, one end of the connector 16 is connected to the moving tool holder 12 via a fitting structure 22, and the other end is connected to the driving end of the linear actuator 23. The fitting structure 22 includes a slot 24 provided on the moving tool holder 12, the outer end of the slot 24 being smaller than the inner end, and one end of the connector 16 is provided with an insert 26 fitted into the slot 24, and the insert 26 is adapted to the slot 24.

[0062] Specifically, the fitting structure 22 is used to connect the connector 16 and the moving tool holder 12, and the connection is flexible and detachable. The moving tool holder 12 and the connector 16 are respectively provided with matching shaped slots 24 and inserts 26. The inserts 26 are specifically circular and are fitted into the slots 24 along the thickness direction to achieve axial positioning.

[0063] like Figure 1 , Figure 3 As shown, the moving tool drive mechanism 6 includes a linear actuator 23. One end of a guide rod 27 is fixed on the tool holder 1. The guide rod 27 passes through the guide hole 29 of the slide 28, and the length direction of the guide rod 27 is consistent with the movement trajectory of the moving tool body 4. The linear actuator 23 is provided between the slide 28 and the tool holder 1. The linear actuator 23 is an integral structure set on the tool holder, including a first cylinder chamber 37 integrally formed on the tool holder. A piston 38 is provided in the first cylinder chamber 37, and a piston rod 39 is connected to the piston 38. One end of the piston rod 39 extends out of the first cylinder chamber 37, which is the driving end of the linear actuator 23. One end of the first cylinder chamber 37 is connected to a first air inlet / outlet port 40, and a piston return elastic element 41 is provided between the other end and the piston 38. The first air inlet / outlet port 40 is used to connect a high-pressure gas supply device, and the driving end is fixedly connected to the slide 28.

[0064] Specifically, the connector 16 is arranged parallel to the side of the linear actuator 23. The slide 28 is used for synchronous connection between the drive end of the linear actuator 23 and the connector 16. The guide rod 27 passes through the guide hole 29 of the slide 28 and is fixed on the tool holder 1 to guide the movement of the slide 28. Moreover, the lower end of the guide rod 27 has a large head with an outer diameter larger than the guide hole 29 to limit the maximum extension distance of the slide 28. To reduce wear and resistance, a linear bearing 25 is provided between the guide hole 29 and the guide rod 27. The linear actuator 23 is equivalent to integrating a cylinder structure onto the tool holder. The high-pressure gas supply device inputs high-pressure gas into the first cylinder chamber 37. This gas causes the piston 38 to move upward against the elastic force of the piston return elastic element 41. The slide 28 moves synchronously with the piston 38 through the piston rod 39.

[0065] like Figure 1 , Figure 2 , Figure 4 As shown, the lower part of the tool holder 1 is provided with a horizontally extending swing hole 30, and one end of the swing rod 31 is provided in the swing hole 30. The tool holder 1 is provided with a telescopic driver 32 at the axis away from the swing rod 31. The tool holder 1 is also provided with a connecting part 33 for connecting the tool holder reset elastic element.

[0066] Specifically, the swing rod 31 is inserted into the swing hole 30 of the blade holder 1 and fixed with a set screw. The swing rod 31 can be inserted and connected to the corresponding part of the sock machine. The blade holder 1 can rotate around the swing rod 31 to control the entry and exit of the cutting edge 34 between the moving blade body 4 and the fixed blade body 3. The blade holder 1 is provided with a connecting part 33, which is specifically ring-shaped and used to connect the blade holder reset elastic element, so that the blade holder 1 has an elastic tendency to swing to one side. The blade holder reset elastic element is a tension spring. The telescopic driver 32 is used to overcome the elastic force and make the blade holder 1 move to the other side to control the entry and exit of the cutting edge 34.

[0067] In this embodiment, the telescopic actuator 32 includes a telescopic rod connecting blind hole 42 disposed on the knife holder 1. The inner end of the telescopic rod 43 is slidably connected in the telescopic rod connecting blind hole 42. A circumferential sealing assembly 44 is provided between the telescopic rod 43 and the telescopic rod connecting blind hole 42. A second cylinder chamber 45 is formed between the inner end face of the telescopic rod 43 and the bottom of the telescopic rod connecting blind hole 42. The second cylinder chamber 45 is connected to a second air inlet / outlet port 46, which is also used to connect a high-pressure gas supply device. The outer end of the telescopic rod 43 extends out of the telescopic rod connecting blind hole 42 and abuts against the contact surface on the sock machine.

[0068] like Figure 1 , Figure 2As shown, the blade of the moving blade 4 and the blade of the fixed blade 3 are arranged in a non-parallel manner, forming a gradually narrowing open slit 34 with a larger outer end and a smaller inner end. During the sliding shearing process, the moving blade 4 achieves a progressive engagement from the inner end to the outer end of the slit 34. A wire stop block 35 is provided at the inner end of the blade of the moving blade 4.

[0069] Specifically, the moving blade 4 and the fixed blade 3 are L-shaped, including a vertically arranged handle and a cutting edge. The cutting edges of the moving blade 4 and the fixed blade 3 are basically opposite each other, with an included angle between them. This included angle forms a cutting opening 34, which is wider at the outside and narrower at the inside to ensure accurate entry of the wire. During the cutting action, the moving blade 4 moves relative to the fixed blade 3, and the two cutting edges at the included angle gradually close together to achieve effective cutting. When cutting multiple wires, they can be cut sequentially to ensure the cutting effect. Furthermore, a wire stop 35 is provided at the inner end of the cutting opening 34, forming a wire-blocking surface that opens outwards towards the cutting opening 34, used to block and limit the deepest position of the wire entering the cutting opening 34.

[0070] As an optimization of this embodiment, the fixed blade body 3 is fixed to the tool holder 1 by a detachable structure 36, which has flexible detachability and is easy to disassemble and replace. A fixed blade mounting groove is provided at the upper end of the guide groove 18 of the tool holder 1, which is recessed into the bottom of the groove. The fixed blade handle 9 of the fixed blade body 3 is embedded in the fixed blade mounting groove, and the plate surface of the blade body is flush with the bottom surface of the guide groove 18. The detachable structure 36 includes a fixed blade fixing bolt, which passes through the bottom of the fixed blade mounting groove from the back and is screwed to the screw hole on the fixed blade body 3 at the front end.

[0071] Specific working principle: After the scissor device is installed in the corresponding position on the sock machine, the swing rod 31 is rotatably connected to the sock machine, the front end of the telescopic rod 43 abuts against the abutting surface of the sock machine, the connecting part 33 is connected to one end of the blade holder reset elastic element, and the other end of the blade holder reset elastic element is connected to the sock machine, so that the blade holder 1 has a tendency to rotate towards the sock machine, and the front end of the swing rod 31 always abuts against the abutting surface.

[0072] When swinging is required, gas is input into the second air inlet / outlet port 46 by the corresponding high-pressure gas supply device, the telescopic rod 43 extends out and connects to the blind hole 42, causing the blade holder 1 to rotate and the shearing end 34 to enter the shearing position. The reverse swing is the same and the action is reversed.

[0073] When shearing is required, gas is input into the first air inlet / outlet port 40 by the high-pressure gas supply device, the piston 38 moves upward, and this movement is transmitted to the moving blade handle 12 through the piston rod 39, the slide 28 and the connecting piece 16. The moving blade body 4 moves upward and the shearing slit 34 gradually engages to complete the shearing action. After shearing is completed, the first air inlet / outlet port 40 opens to release the high-pressure gas, the compressed piston reset elastic element 41 releases its elastic force, pushes the piston 38 to reset, the moving blade body 4 moves downward, and the shearing slit 34 reopens.

[0074] Example 2

[0075] The working principle of this embodiment is basically the same as that of embodiment 1, except that the movement trajectory of the moving blade 4 is arc-shaped.

[0076] Specific implementation examples Figure 5 As shown, the moving guide surface 10 is arc-shaped, and the moving cutter body 4 can move along the arc of the moving guide surface 10. The guide hole 29 is set as a strip, and its length direction is parallel to the plane where the arc-shaped moving path is located. The driving end passes through the guide hole 29 and can slide adaptively along the guide hole 29.

[0077] Specifically, the inner surface of the moving blade 4 is slidably connected to the moving guide surface 10, allowing it to slide along the moving guide surface 10. The shape of this inner surface matches the shape of the moving guide surface 10, enabling the moving blade 4 to move in an arc shape. Similarly, the shearing surfaces of the moving blade 4 and the fixed blade 3 are also matching arc shapes, ensuring that the moving blade 4 smoothly shears the wire when moving relative to the fixed blade 3. Furthermore, the drive end is provided with two annular limiting surfaces that slide against the top and bottom surfaces of the slide block 28, respectively. One annular limiting surface is formed on a radially extending annular step at the inner end of the drive end, and the other is formed on the top surface of a limiting nut that is threadedly connected to the outer end of the drive end.

[0078] Example 3

[0079] The working principle of this embodiment is basically the same as that of embodiment 1. The difference is that the linear actuator 23 is an independent structure and is fixed on the tool holder 1.

[0080] In this embodiment, the linear actuator 23 is an independent cylinder assembly. The cylinder body of the cylinder assembly is fixed on the tool holder 1, and its piston rod is fixedly connected to the slide 28.

[0081] Example 4

[0082] The working principle of this embodiment is basically the same as that of embodiment 3, except that the movement trajectory of the moving blade 4 is arc-shaped.

[0083] In this embodiment, the movable guide surface 10 is arc-shaped, and the moving blade 4 can move along the arc of the movable guide surface 10. The driving end of the linear actuator 23 is hinged to the slide 28, and the other end is hinged to the tool holder 1.

[0084] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A thread trimming device of a hosiery machine, comprising a holder (1) provided with a pair of scissors (2) comprising a fixed blade (3) and a movable blade (4), characterized in that, The fixed blade body (3) is mounted on the blade holder (1). A moving guide mechanism (5) is provided between the moving blade body (4) and the fixed blade body (3). The moving blade body (4) is connected to the moving blade drive mechanism (6). The moving blade drive mechanism (6) can drive the moving blade body (4) to approach or move away from the fixed blade body (3), and can make the blade of the moving blade body (4) and the blade of the fixed blade body (3) interlock and engage to achieve shearing.

2. The thread-cutting device of the sock machine according to claim 1, characterized in that, The moving guide mechanism (5) includes N first strip-shaped limiting grooves (7) provided on the moving cutter body (4), and N≥1. The extension direction of the first strip-shaped limiting grooves (7) is consistent with the moving direction of the moving cutter body (4) relative to the fixed cutter body (3). A first guide body (8) that can slide along the length direction of the first strip-shaped limiting groove (7) is provided in the first strip-shaped limiting groove (7). The first guide body (8) is fixed on the fixed cutter handle (9) of the fixed cutter body (3).

3. The thread-cutting device for a sock machine according to claim 2, characterized in that, The fixed blade body (3) and / or the blade holder (1) are provided with a movable guide surface (10) that can guide the moving blade body (4). The movable guide surface (10) is straight or arc-shaped, and the moving blade body (4) can move linearly or arc-shaped along the movable guide surface (10).

4. The thread-cutting device for a sock machine according to claim 2, characterized in that, The outer end of the first guide (8) is provided with a first cap (11) that can prevent the moving cutter body (4) from detaching along the axial direction of the first guide (8).

5. The thread-cutting device for a sock machine according to claim 1, characterized in that, The moving guide mechanism (5) includes any one or more of the following: a slider rail unit, a bearing optical shaft unit, or a cross roller guide rail, which are disposed between the moving cutter body (4) and the fixed cutter body (3). The moving cutter body (4) is capable of linear or arc-shaped movement.

6. The thread-cutting device for a sock machine according to any one of claims 1-5, characterized in that, The moving blade body (4) is connected to the moving blade drive mechanism (6) through the connecting piece (16), and a secondary guide structure (17) is provided between the connecting piece (16) and the tool holder (1).

7. The thread-cutting device for a sock machine according to claim 6, characterized in that, The secondary guide structure (17) includes a guide groove (18) disposed between the connector (16) and the tool holder (1), and the extension direction of the guide groove (18) is consistent with the movement direction of the moving tool body (4) relative to the fixed tool body (3). And / or, the secondary guide structure (17) includes M second strip-shaped limiting grooves (19) provided on the connector (16), M≥1, and a second guide body (20) is provided in the second strip-shaped limiting groove (19). The second guide body (20) is fixed on the tool holder (1). The extension direction of the second strip-shaped limiting groove (19) is consistent with the movement direction of the moving tool body (4) relative to the fixed tool body (3). The outer end of the second guide body (20) is provided with a second cap (21) to prevent the connector (16) from detaching along the axial direction of the second guide body (20).

8. The thread-cutting device for a sock machine according to claim 6, characterized in that, One end of the connector (16) is connected to the moving tool holder (12) through a fitting structure (22), and the other end is connected to the driving end of the linear driver (23) of the moving tool driving mechanism (6).

9. The thread-cutting device for a sock machine according to claim 8, characterized in that, The fitting structure (22) includes a fitting (24) on the moving tool holder (12), the outer end of the fitting (24) is smaller than the inner end, and one end of the connector (16) is provided with an insert (26) embedded in the fitting (24), and the insert (26) is adapted to the fitting (24).

10. The thread-cutting device for a sock machine according to any one of claims 1-5, characterized in that, The moving tool drive mechanism (6) includes a linear driver (23). One end of a guide rod (27) is fixed on the tool holder (1). The guide rod (27) passes through the guide hole (29) of the slide (28), and the length direction of the guide rod (27) is consistent with the movement trajectory of the moving tool body (4). The linear driver (23) is provided between the slide (28) and the tool holder (1).

11. The thread-cutting device for a sock machine according to any one of claims 1-5, characterized in that, The tool holder (1) has a horizontally extending swing hole (30) at the bottom. One end of the swing rod (31) is provided in the swing hole (30). The tool holder (1) has a telescopic driver (32) at the axis away from the swing rod (31). The tool holder (1) also has a connecting part (33) for connecting the tool holder reset elastic element.

12. The thread-cutting device for a sock machine according to any one of claims 1-5, characterized in that, The blade of the moving blade (4) and the blade of the fixed blade (3) are arranged in a non-parallel manner, forming a gradually narrowing open scissor (34) with a large outer end and a small inner end. The moving blade (4) achieves a progressive engagement from the inner end to the outer end of the scissor during the sliding shearing process. The blade of the moving blade (4) or the inner end of the blade of the fixed blade (3) is provided with a wire stop (35).

13. The thread-cutting device for a sock machine according to any one of claims 1-5, characterized in that, The fixed blade body (3) is fixed to the tool holder (1) by a detachable structure (36).

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