Improved double-end thread hooking device

Abstract

The utility model relates to the technical field related to spinning, and discloses an improved double-end thread hooking device which comprises a bottom plate, a cover plate and thread hooking knives, a sliding groove is formed in the cover plate, the thread hooking knives are arranged in the sliding groove in a sliding mode, a transverse box body is connected between the two thread hooking knives, a transverse sliding groove is formed in the transverse box body, and a limiting column is arranged in the transverse sliding groove in a sliding mode. A driving mechanism is further installed on the bottom plate in a swinging mode and comprises a swinging rod, the swinging rod is provided with a limiting sliding groove, the limiting column slides in the limiting sliding groove, a transverse sliding block is arranged at an opening of the transverse sliding groove in a sliding mode, the transverse sliding block is provided with a through groove, the limiting column rotates in the through groove, and a rack is fixedly arranged on the inner wall of the transverse sliding groove. An operator only needs to press a limiting column, a center column drives an adjusting gear to move in a transverse sliding groove, so that the vertical moving amplitude of the thread hooking knife is changed, and the device has a self-locking function and is simple in operation step.

Description

Technical Field

[0001] This utility model belongs to the field of textile-related technology, and more specifically, it relates to an improved double-headed hook. Background Technology

[0002] An important component in an embroidery machine is the thread hook, which is the part that performs the thread hooking action. Its main action is to move up and down to perform the thread hooking action. Embroidery machines usually have a row of thread hooks arranged at intervals, and several thread hooks can move up and down synchronously under the operation of the drive mechanism.

[0003] The existing technology still has the following technical problems:

[0004] To improve line-hanging efficiency, a double-headed line-hanging device has emerged in the prior art, which has line-hanging blades that can slide up and down simultaneously. The specific implementation structure is relatively simple, including double-headed line-hanging blades and a reciprocating mechanism that drives them to move up and down. However, the existing structure is of fixed specifications and cannot adapt to different working conditions. For example, in some working conditions, it is necessary to increase or decrease the movement range of the line-hanging blades and increase or decrease the extension length of the line-hanging blades. In other working conditions, it is necessary to change the spacing between two adjacent line-hanging blades. The existing double-headed line-hanging device cannot meet the above requirements.

[0005] Therefore, in view of this, the existing structure was studied and improved to provide an improved double-headed hook tool to solve the technical problem that the movement amplitude of the double-headed hook knife cannot be adjusted. Utility Model Content

[0006] This invention provides an improved double-headed hook to overcome the aforementioned defects in the prior art.

[0007] The purpose and effect of this improved double-headed hook-and-loop device are achieved by the following specific technical means:

[0008] This utility model provides an improved double-headed hooking device, including a base plate, a cover plate, and hooking blades. Two cover plates are spaced apart and mounted on the base plate. Each cover plate has a groove in which the hooking blade slides. A transverse box is connected between the two hooking blades. A transverse groove is formed on the transverse box, and a limiting post slides within the transverse groove. A driving mechanism for reciprocating the limiting post is also oscillatingly mounted on the base plate. The driving mechanism includes a swing rod with a limiting groove. The limiting post slides within the limiting groove. A transverse slider is slidably positioned at the opening of the transverse groove. The transverse slider has a through groove, and the limiting post rotates within the through groove. The inner wall of the transverse groove... A rack is fixedly installed, one end of the limiting post extends into the transverse slide groove and is fixedly installed with an adjusting gear, which meshes with the rack. A pressure adjusting groove is formed at the end of the limiting post extending into the transverse slide groove. A telescopic part is slidably installed in the pressure adjusting groove, and a pressure spring is installed in the pressure adjusting groove. One end of the pressure spring abuts against the telescopic part to push the telescopic part out of the pressure adjusting groove. The telescopic part abuts against the inner wall of the transverse slide groove. A friction strip is fixedly installed on the side of the adjusting gear away from the telescopic part. A friction plate is fixedly installed on the inner wall of the transverse slide groove. The friction plate and the friction strip are arranged opposite to each other and can abut against each other to limit the rotation of the adjusting gear.

[0009] In a further technical solution, the limiting post includes a central post and a rolling bearing rotatably mounted on the central post. The rolling bearing extends into the limiting groove and rolls within the limiting groove. The pressure adjusting groove passes through the central post. The inner wall of the pressure adjusting groove has an internal thread. A pressure adjusting block is provided within the pressure adjusting groove. The pressure adjusting block has an external thread and is threadedly connected to the pressure adjusting groove. The end of the pressure adjusting block away from the telescopic part has a first internal hexagonal groove.

[0010] In a further technical solution, a hexagonal protrusion is fixedly provided at one end of the central column away from the telescopic part, and the center of the hexagonal protrusion has a second internal hexagonal groove, and the second internal hexagonal groove communicates with the pressure regulating groove.

[0011] A further technical solution is provided, wherein the hooking knife is provided with a horizontal spacing adjustment groove, and a countersunk groove is provided on the back of the hooking knife with the spacing adjustment groove as the center. A locking screw is slidably provided in the countersunk groove, and the locking screw passes through the spacing adjustment groove and is threadedly locked to the horizontal box body.

[0012] In a further technical solution, the telescopic part includes a sliding rod and a contact head fixed on the sliding rod. The sliding rod slides within the pressure adjusting groove, and the contact head abuts against the inner wall of the transverse sliding groove. The contact head has a first conical surface, and the adjusting gear has a second conical surface facing the contact head. The first conical surface and the second conical surface can fit together.

[0013] In a further technical solution, the end face of the adjusting gear facing the telescopic part is recessed to form an annular groove, the center of the annular groove protrudes outward to form an annular protrusion, the pressure adjusting groove passes through the center of the annular protrusion, the opening edge of the pressure adjusting groove facing upward is chamfered to form the first conical surface, and the annular protrusion protrudes from the side of the adjusting gear so that only the annular protrusion abuts against the telescopic part.

[0014] In a further technical solution, a strip-shaped groove is provided on the side of the transverse slide away from the rolling bearing, and a back panel is detachably installed on the strip-shaped groove. The inner wall of the back panel abuts against the telescopic part, and a smooth layer to reduce friction is provided at the part of the back panel that abuts against the telescopic part.

[0015] In a further technical solution, the driving mechanism further includes a rotating cylinder, a driving plate, and a central screw. The rotating cylinder has a first through hole in its center, and the driving plate has a second through hole. One end of the central screw passes through the second through hole and the first through hole in sequence and is fixed on the base plate. The driving plate and the rotating cylinder can rotate relative to each other. The rotating cylinder is fixedly connected to the swing rod, and a torsion spring is provided between the driving plate and the rotating cylinder.

[0016] In a further technical solution, the drive plate is an L-shaped plate, which has a long plate and a short plate. A second through hole is provided at the connection between the long plate and the short plate. A drive handle is rotatably provided at the end of the long plate. A limiting folding plate is fixedly provided on the short plate. The limiting folding plate can abut against the side of the swing rod.

[0017] In a further technical solution, a scale is provided on the panel at the opening of the transverse slide groove. The scale is parallel to the transverse slide groove, and a pointer is provided in the middle of the transverse slider. The pointer points to the scale to mark the displacement of the transverse slider relative to the transverse slide groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This improved double-headed wire hooker incorporates a transverse housing and a limiting post. To adapt to different working conditions, the operator can fine-tune the movement of the wire hook blade. The operator simply presses the limiting post, causing the central post to move the adjusting gear within the transverse groove. The central post slides relative to the telescopic part, compressing the pressure spring. At this point, the adjusting gear moves away from the friction plate, unlocking the restriction on its rotation. With the central post pressed, the operator can rotate it to drive the adjusting gear to rotate synchronously. The adjusting gear meshes with the rack, causing it to move laterally within the transverse groove. The transverse slider moves with the central post, primarily limiting the axial position of the central post. By adjusting the central post's position laterally to the designated location, the operator changes the vertical movement of the wire hook blade. Releasing the pressure on the limiting post causes the central post to pop outward under the pressure spring, causing the adjusting gear to re-engage with the friction plate, limiting its own rotation. This automatically locks the limiting post in the transverse groove, enabling rapid adjustment of the wire hook blade's vertical movement. This device features a self-locking function and simple operation.

[0020] This improved double-headed hook device incorporates a pressure adjusting block, a pressure spring, and a telescopic part. Operators can fine-tune the movement damping of the limiting post to reduce its sway and improve its displacement accuracy. Specifically, the operator inserts a hex wrench into the first internal hexagonal groove and rotates the pressure adjusting block to adjust the distance between it and the telescopic part. This adjusts the compression of the pressure spring. Increased compression increases the pressure of the telescopic part against the inner wall of the transverse slide, increasing friction and thus slightly increasing the damping of the limiting post's movement. This reduces sway and improves the stability of the limiting post, facilitating precise adjustment of its position. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the 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 some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the two hook-and-loop cutter and the horizontal box body of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the hook-out knife of this utility model;

[0026] Figure 4 This is a schematic diagram of the drive mechanism of this utility model;

[0027] Figure 5 This is a front view of the drive mechanism of this utility model;

[0028] Figure 6 This is a schematic diagram of the horizontal box body of this utility model;

[0029] Figure 7 yes Figure 6 Cross-sectional view;

[0030] Figure 8 yes Figure 7 Enlarged structural diagram of the central adjusting gear;

[0031] Figure 9 This is an enlarged structural schematic diagram of the telescopic part and adjusting gear of this utility model;

[0032] Figure 10 This is a cross-sectional view of the adjusting gear of this utility model in the transverse slide groove.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Base plate, 11. Cover plate, 12. Hooking knife, 13. Drive mechanism, 14. Horizontal box, 15. Spacing adjustment groove, 16. Locking screw, 17. Swing rod, 18. Limiting slide groove, 19. Rotating cylinder, 20. Drive plate, 21. Center screw, 22. Torsion spring, 24. Horizontal slide groove, 25. Horizontal slider, 26. Rolling bearing, 27. Adjusting gear, 28. Rack, 29. Friction plate, 30. Center column, 31. Back panel, 32. Telescopic part, 34. Friction strip, 35. Pressure adjustment block, 36. Pressure spring, 40. Pressure adjustment groove, 41. Hexagonal protrusion, 42. Annular groove, 43. Annular protrusion, 44. Drive handle, 45. Scale, 46. Pointer, 50. Limiting folding plate. Detailed Implementation

[0035] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0036] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] See attached document Figure 1-10 This utility model provides an improved double-headed hook, including a base plate 10, a cover plate 11, and hook blades 12. Two cover plates 11 are installed on the base plate 10 at intervals. Each cover plate 11 has a groove in which the hook blades 12 are slidably arranged. A transverse box 14 is connected between the two hook blades 12. A transverse groove 24 is opened on the transverse box 14, and a limiting post is slidably arranged in the transverse groove 24. A drive mechanism 13 for driving the limiting post to move up and down is also oscillatingly installed on the base plate 10. The drive mechanism 13 includes a swing rod 17, which has a limiting groove 18 in which the limiting post slides. A transverse slider 25 is slidably arranged at the opening of the transverse groove 24. The transverse slider 25 has a through groove in which the limiting post rotates. A rack 28 is fixedly installed on the inner wall. One end of a limiting post extends into the transverse slide groove 24 and is fixedly installed with an adjusting gear 27. The adjusting gear 27 meshes with the rack 28. A pressure adjusting groove 40 is opened at one end of the limiting post extending into the transverse slide groove 24. A telescopic part 32 is slidably installed in the pressure adjusting groove 40, and a pressure spring 36 is installed in the pressure adjusting groove 40. One end of the pressure spring 36 abuts against the telescopic part 32 to push the telescopic part 32 out of the pressure adjusting groove 40. The telescopic part 32 abuts against the inner wall of the transverse slide groove 24. A friction strip 34 is fixedly installed on the side of the adjusting gear 27 away from the telescopic part 32. A friction plate 29 is fixedly installed on the inner wall of the transverse slide groove 24. The friction plate 29 and the friction strip 34 are arranged opposite to each other and can abut against each other to limit the rotation of the adjusting gear 27.

[0039] In this embodiment, the drive mechanism 13 pushes the limiting post to move up and down reciprocally. The limiting post drives the transverse box 14 to move synchronously. The transverse box 14 drives the two hooking blades 12 to move up and down to achieve the hooking function. To adapt to different working conditions, the diving depth of the hooking blades 12 can be finely adjusted. The operator only needs to press the limiting post, and the central post 30 drives the adjusting gear 27 to move in the transverse slide groove 24. The central post 30 slides relative to the telescopic part 32 to squeeze the pressure spring 36. At this time, the adjusting gear 27 moves away from the friction plate 29 to unlock the restriction on the rotation of the adjusting gear 27. Under the premise of pressing the central post 30, the operator only needs to rotate the central post 30 to drive the adjusting gear 27 to rotate synchronously. The adjusting gear 27 and the gear... The 28 meshes, thereby driving the adjusting gear 27 to move laterally in the transverse slide groove 24. The transverse slider 25 moves together with the central column 30. The transverse slider 25 mainly serves to limit the axial position of the central column 30. The operator adjusts the position of the central column 30 laterally to the designated position, thereby changing the vertical movement of the hook knife 12. When the operator releases the pressure on the limiting column, the central column 30 pops outward under the push of the pressure spring 36, and drives the adjusting gear 27 to abut against the friction plate 29 again, thereby limiting the rotation of the adjusting gear 27 itself. This automatically locks the position of the limiting column in the transverse slide groove 24, which can quickly adjust the vertical movement of the hook knife 12. It has a self-locking function and the operation steps are simple.

[0040] Preferably, the limiting post includes a central post 30 and a rolling bearing 26 rotatably mounted on the central post 30. The rolling bearing 26 extends into the limiting slide groove 18 and rolls within the limiting slide groove 18. The pressure adjusting groove 40 passes through the central post 30. The inner wall of the pressure adjusting groove 40 has internal threads. A pressure adjusting block 35 is provided in the pressure adjusting groove 40. The pressure adjusting block 35 has external threads and is threadedly connected to the pressure adjusting groove 40. The end of the pressure adjusting block 35 away from the telescopic part 32 has a first internal hexagonal groove.

[0041] In this embodiment, the operator uses a hex wrench to insert into the first internal hexagonal groove and rotates the pressure adjusting block 35 to adjust the distance between the pressure adjusting block 35 and the telescopic part 32, thereby adjusting the compression of the pressure spring 36. When the compression of the pressure spring 36 increases, the pressure of the telescopic part 32 against the inner wall of the transverse slide groove 24 increases, and the friction between the telescopic part 32 and the inner wall of the transverse slide groove 24 increases. This appropriately increases the damping of the movement of the limiting post, reduces the shaking of the limiting post, and facilitates precise adjustment of the position of the limiting post.

[0042] Preferably, a hexagonal protrusion 41 is fixedly provided at the end of the central column 30 away from the telescopic part 32. The hexagonal protrusion 41 has a second internal hexagonal groove in the center, and the second internal hexagonal groove communicates with the pressure adjustment groove 40.

[0043] In this embodiment, the operator can use a hex wrench to reach into the second internal hexagonal groove to drive the hexagonal protrusion 41 and the central post 30 to rotate synchronously.

[0044] Preferably, the hook knife 12 has a horizontal spacing adjustment groove 15, and a countersunk groove is formed on the back of the hook knife 12 with the spacing adjustment groove 15 as the center. A locking screw 16 is slidably arranged in the countersunk groove, and the locking screw 16 passes through the spacing adjustment groove 15 and is threadedly locked to the horizontal box body 14.

[0045] In this embodiment, the position of the locking screw 16 in the countersunk groove is adjustable. The operator first rotates it in the reverse direction to loosen the connection between the locking screw 16 and the transverse box 14, slides the locking screw 16 to adjust the distance between the two hooking blades 12, and after adjustment, rotates the locking screw 16 in the forward direction to lock the locking screw 16 and the transverse box 14, while fixing the hooking blades 12 at both ends of the transverse box 14.

[0046] Preferably, the telescopic part 32 includes a sliding rod and a contact head fixed on the sliding rod. The sliding rod slides in the pressure adjusting groove 40, and the contact head abuts against the inner wall of the transverse sliding groove 24. The contact head has a first conical surface, and the adjusting gear 27 has a second conical surface facing the contact head. The first conical surface and the second conical surface can fit together.

[0047] Preferably, the adjusting gear 27 is recessed towards the end face of the telescopic part 32 to form an annular groove 42, the center of the annular groove 42 protrudes outward to form an annular protrusion 43, the pressure adjusting groove 40 passes through the center of the annular protrusion 43, the opening edge of the pressure adjusting groove 40 facing upward towards the telescopic part 32 is chamfered to form a first conical surface, and the annular protrusion 43 protrudes from the side of the adjusting gear 27 so that only the annular protrusion 43 abuts against the telescopic part 32.

[0048] In this embodiment, when the operator presses the limiting post, the central post 30 pushes the adjusting gear 27 to abut against the telescopic part 32. Since the annular protrusion 43 protrudes from the side of the adjusting gear 27, only the annular protrusion 43 abuts against the telescopic part 32 at this time. The first conical surface and the second conical surface fit together, reducing the contact area and reducing the resistance of the operator to rotate the central post 30. At the same time, the abutting of the two conical surfaces has a centering effect, which can keep the end of the central post 30 near the telescopic part 32 in a non-suspended state, increasing the support and stability of the central post 30.

[0049] Preferably, the transverse slide 24 has a strip-shaped slot on the side opposite to the rolling bearing 26, and a back panel 31 is detachably installed on the strip-shaped slot. The inner wall of the back panel 31 abuts against the telescopic part 32, and a smooth layer to reduce friction is provided at the part where the back panel 31 abuts against the telescopic part 32.

[0050] Preferably, the drive mechanism 13 further includes a rotating cylinder 19, a drive plate 20, and a center screw 21. The rotating cylinder 19 has a first through hole in the center, the drive plate 20 has a second through hole, and one end of the center screw 21 passes through the second through hole and the first through hole in sequence and is fixed on the base plate 10. The drive plate 20 and the rotating cylinder 19 can rotate relative to each other. The rotating cylinder 19 is fixedly connected to the swing rod 17, and a torsion spring 22 is provided between the drive plate 20 and the rotating cylinder 19.

[0051] Preferably, the drive plate 20 is an L-shaped plate, which has a long plate and a short plate. A second through hole is provided at the connection between the long plate and the short plate. A drive handle 44 is rotatably provided at the end of the long plate. A limiting folding plate 50 is fixedly provided on the short plate. The limiting folding plate 50 can abut against the side of the swing rod 17.

[0052] Preferably, a scale 45 is provided on the panel at the opening of the transverse slide 24. The scale 45 is parallel to the transverse slide 24. A pointer 46 is provided in the middle of the transverse slider 25. The pointer 46 points to the scale 45 to mark the displacement of the transverse slider 25 relative to the transverse slide 24.

[0053] The working process of this device:

[0054] This device is installed on an embroidery machine. The drive structure of the embroidery machine is connected to the drive handle 44, thereby driving the drive plate 20 to swing back and forth. The drive plate 20 is connected to the rotating cylinder 19 through a torsion spring. The drive plate 20 drives the rotating cylinder 19 to swing synchronously. The rotating cylinder 19 drives the swing rod 17 to swing. The swing rod 17 drives the limit post to move up and down back and forth. The two hooking knives 12 move back and forth synchronously with the limit post to realize the hooking action of the embroidery machine.

[0055] Fine-tuning the movement of the wire hook 12: To adapt to different working conditions, the operator needs to fine-tune the depth of the wire hook 12. The operator only needs to press the limit post, and the center post 30 drives the adjusting gear 27 to move in the transverse slide groove 24. The center post 30 slides relative to the telescopic part 32 to compress the pressure spring 36. At this time, the adjusting gear 27 moves away from the friction plate 29 to unlock the restriction on the rotation of the adjusting gear 27. While pressing the center post 30, the operator only needs to rotate the center post 30 to drive the adjusting gear 27 to rotate synchronously. The adjusting gear 27 meshes with the rack 28, thereby driving the adjusting gear 27 to move laterally in the transverse slide groove 24. The horizontal slider 25 moves together with the central column 30. The horizontal slider 25 mainly restricts the axial position of the central column 30. The operator adjusts the position of the central column 30 laterally to the designated position, thereby changing the vertical movement of the hook knife 12. When the operator releases the pressure on the limiting column, the central column 30 pops out under the push of the pressure spring 36, and drives the adjusting gear 27 to re-abut against the friction plate 29 to limit the rotation of the adjusting gear 27 itself, thereby automatically locking the position of the limiting column in the horizontal slide groove 24, which can quickly adjust the vertical movement of the hook knife 12. This device has a self-locking function and the operation steps are simple.

[0056] Fine-tuning the movement damping of the limiting post: The operator uses a hex wrench to insert into the first internal hexagonal groove and rotates the pressure adjusting block 35 to adjust the distance between the pressure adjusting block 35 and the telescopic part 32, thereby adjusting the compression of the pressure spring 36. When the compression of the pressure spring 36 increases, the pressure of the telescopic part 32 against the inner wall of the transverse slide groove 24 increases, and the friction between the telescopic part 32 and the inner wall of the transverse slide groove 24 increases. Appropriately increasing the damping of the movement of the limiting post reduces the swaying of the limiting post, so as to accurately adjust the position of the limiting post.

[0057] Fine-tuning the distance between the two hook-and-loop cutters 12: The locking screw 16 is adjustable in the countersunk groove position. The operator first rotates it in the reverse direction to loosen the connection between the locking screw 16 and the horizontal box 14, slides the locking screw 16 to adjust the distance between the two hook-and-loop cutters 12, and after adjustment, rotates the locking screw 16 in the forward direction to lock the locking screw 16 and the horizontal box 14, while fixing the hook-and-loop cutters 12 at both ends of the horizontal box 14.

[0058] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An improved double-headed wire hook, comprising a base plate, cover plates, and a wire hooking blade, wherein two cover plates are spaced apart and mounted on the base plate, each cover plate having a groove in which the wire hooking blade is slidably disposed, characterized in that, A transverse box is connected between the two hook-and-line cutters. A transverse groove is formed on the transverse box, and a limiting post is slidably positioned within the groove. A drive mechanism is also oscillatingly mounted on the base plate to drive the limiting post up and down. The drive mechanism includes a swing rod with a limiting groove, within which the limiting post slides. A transverse slider is slidably positioned at the opening of the transverse groove, and a through groove is formed in the slider, within which the limiting post rotates. A rack is fixedly mounted on the inner wall of the transverse groove, and one end of the limiting post extends into the transverse groove and is fixedly mounted with an adjusting gear. The adjusting gear meshes with the rack. A pressure adjusting groove is formed at one end of the limiting post that extends into the transverse slide groove. A telescopic part is slidably arranged in the pressure adjusting groove, and a pressure spring is arranged in the pressure adjusting groove. One end of the pressure spring abuts against the telescopic part to push the telescopic part out of the pressure adjusting groove. The telescopic part abuts against the inner wall of the transverse slide groove. A friction strip is fixedly arranged on the side of the adjusting gear away from the telescopic part. A friction plate is fixedly arranged on the inner wall of the transverse slide groove. The friction plate and the friction strip are arranged opposite to each other and can abut against each other to limit the rotation of the adjusting gear.

2. The improved double-headed hook according to claim 1, characterized in that: The limiting post includes a central post and a rolling bearing rotatably mounted on the central post. The rolling bearing extends into the limiting groove and rolls within the limiting groove. The pressure adjusting groove passes through the central post. The inner wall of the pressure adjusting groove has internal threads. A pressure adjusting block is provided within the pressure adjusting groove. The pressure adjusting block has external threads and is threadedly connected to the pressure adjusting groove. The end of the pressure adjusting block away from the telescopic part has a first internal hexagonal groove.

3. An improved double-headed hook according to claim 2, characterized in that: A hexagonal protrusion is fixedly provided at one end of the central column away from the telescopic part. The hexagonal protrusion has a second internal hexagonal groove in the center, and the second internal hexagonal groove communicates with the pressure regulating groove.

4. An improved double-headed hook according to claim 1, characterized in that: The wire-drawing knife has a horizontal spacing adjustment groove. A countersunk groove is formed on the back of the wire-drawing knife with the spacing adjustment groove as the center. A locking screw is slidably installed in the countersunk groove. The locking screw passes through the spacing adjustment groove and is threadedly locked to the horizontal box body.

5. An improved double-headed hook according to claim 1, characterized in that: The telescopic part includes a sliding rod and a contact head fixed on the sliding rod. The sliding rod slides in the pressure adjusting groove, and the contact head abuts against the inner wall of the transverse sliding groove. The contact head has a first conical surface, and the adjusting gear has a second conical surface facing the contact head. The first conical surface and the second conical surface can fit together.

6. An improved double-headed hook according to claim 5, characterized in that: The adjusting gear is recessed towards the end face of the telescopic part to form an annular groove. The center of the annular groove protrudes outward to form an annular protrusion. The pressure adjusting groove passes through the center of the annular protrusion. The opening edge of the pressure adjusting groove facing upward is chamfered to form the first conical surface. The annular protrusion protrudes from the side of the adjusting gear so that only the annular protrusion abuts against the telescopic part.

7. An improved double-headed hook according to claim 2, characterized in that: The transverse slide groove has a strip-shaped slot on the side opposite to the rolling bearing. A back panel is detachably installed on the strip-shaped slot. The inner wall of the back panel abuts against the telescopic part, and a smooth layer to reduce friction is provided at the part of the back panel that abuts against the telescopic part.

8. An improved double-headed hook according to claim 1, characterized in that: The driving mechanism further includes a rotating cylinder, a driving plate, and a central screw. The rotating cylinder has a first through hole in its center, and the driving plate has a second through hole. One end of the central screw passes through the second through hole and the first through hole in sequence and is fixed on the base plate. The driving plate and the rotating cylinder can rotate relative to each other. The rotating cylinder is fixedly connected to the swing rod, and a torsion spring is provided between the driving plate and the rotating cylinder.

9. An improved double-headed hook according to claim 8, characterized in that: The drive plate is an L-shaped plate with a long plate and a short plate. A second through hole is provided at the connection between the long plate and the short plate. A drive handle is rotatably provided at the end of the long plate. A limiting folding plate is fixedly provided on the short plate. The limiting folding plate can abut against the side of the swing rod.

10. An improved double-headed hook according to claim 1, characterized in that: A scale is provided on the panel at the opening of the transverse slide groove. The scale is parallel to the transverse slide groove. A pointer is provided in the middle of the transverse slider. The pointer points to the scale to mark the displacement of the transverse slider relative to the transverse slide groove.

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