Scissor assembly of double-needle chain type reel foot machine

Abstract

The utility model discloses a scissors assembly of a double-needle chain type reel foot machine, and relates to the technical field. Comprising a screw rod arranged at the top end of a bottom plate, a connecting strip connected to the surface of the screw rod, a movable cutter arranged on the surface of the connecting strip, a hole groove formed in the surface of the bottom plate, a fixed cutter arranged at the top end of the bottom plate, a partition plate slidably arranged on the surface of the connecting strip, a movable shaft arranged at the top end of the partition plate and a connecting rod arranged on the surface of the movable shaft. The cylinder is arranged at the other end of the connecting rod. According to the thread trimming device, the arc-shaped moving plate, the sliding groove, the sliding block and the like are arranged, the connecting strip can drive the fixed cutter to move in a limited mode, the situation that the fixed cutter is dislocated is avoided, and therefore thread trimming work is facilitated, meanwhile, the screw is positioned through the two nuts with the opposite rotating directions at the bottom end of the screw, and the two nuts can be limited through the positioning rod; therefore, certain influence on thread trimming work due to dislocation of the fixed cutter and the movable cutter caused by loosening of the nut after long-time use can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of roller-foot machines, in particular to a scissors assembly for a double-needle chain roller-foot machine. Background Art

[0002] A trouser leg sewing machine is a sewing machine used for sewing trouser legs. The commonly used stitches for sewing trouser legs are lock stitch and chain stitch. The chain stitch requires the needle to swing up and down while the chain thread take-up lever swings and the curved needle swings back and forth to sew to complete the stitch. In the existing sewing process of the trouser leg sewing machine, it is usually necessary to cut the stitches.

[0003] A thread cutting structure on a reeling machine shown in the utility model publication number CN209669476U includes a needle plate. The thread cutting structure includes a fixed knife connected to the needle plate and a movable knife hinged on the needle plate. The movable knife is connected to a connecting plate that can drive the movable knife to rotate, and the connecting plate is connected to a driving cylinder that can drive the connecting plate to move. It is characterized in that the thread cutting structure also includes an axial screw, the axial screw includes a screw rod and a nut, and the screw rod has an annular abutment portion. After the end of the screw rod passes through the movable knife and the needle plate for threaded connection, the nut can fit with the movable knife and the abutment portion abuts against the needle plate.

[0004] In the above device, one end of the axial screw is connected to the nut, and the adjusting nut can ensure that the nut is always in contact with the movable knife, and the movable knife can maintain stable rotation, thereby improving the stability of the wire cutting structure. However, after long-term use, the nut is prone to loosening, resulting in the movable knife being unable to fit with the nut, thereby causing the movable knife and the fixed knife to be misaligned, which has a certain impact on the wire cutting work. Utility Model Content

[0005] The utility model provides a double-needle chain-type reeling machine scissors assembly, which can enable a connecting strip to drive a fixed knife to move in a limited manner by means of an arc-shaped moving plate, a sliding groove slider, etc., so as to avoid the fixed knife from being misplaced, thereby facilitating the thread cutting work; at the same time, the screw is positioned by means of two nuts with opposite directions at the bottom end of the screw, and the two nuts can also be limited by a positioning rod, so as to prevent the nut from loosening under long-term use, so that the fixed knife and the moving knife are misplaced, thereby affecting the thread cutting work, and in summary, solves the problems in the background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A double-needle chain-type reeling machine scissors assembly comprises a screw arranged at the top of a bottom plate, a connecting strip arranged on the surface of the screw, a movable knife arranged on the surface of the connecting strip, a hole groove arranged on the surface of the bottom plate, a fixed knife arranged at the top of the bottom plate, a partition arranged on the surface of the connecting strip for sliding, a movable shaft arranged at the top of the partition, a connecting rod arranged on the surface of the movable shaft, and a cylinder arranged at the other end of the connecting rod;

[0008] A movable plate is connected to one side of the connecting strip, and a sliding groove is provided at the top of the bottom plate;

[0009] The surface of the screw rod is provided with a first thread groove and a second thread groove respectively, and the screw rod passes through the bottom plate and is connected with a first nut and a second nut respectively;

[0010] A first positioning hole is formed on the surface of the first nut, and a second positioning hole is formed on the surface of the second nut;

[0011] A connecting block is provided at the bottom end of the second nut, and a spring is connected inside the connecting block. The top end of the spring is connected to a positioning rod, and the bottom end of the positioning rod is connected to a pull rod, and the bottom end of the pull rod is connected to an annular plate.

[0012] As a further description of the above technical solution:

[0013] The movable plate and the slide groove are arranged in an arc shape.

[0014] As a further description of the above technical solution:

[0015] A sliding block is slidably connected inside the sliding groove, and the sliding block is connected to the bottom end of the connecting strip.

[0016] As a further description of the above technical solution:

[0017] The first nut is connected to the surface of the first thread groove, and the second nut is connected to the surface of the second thread groove.

[0018] As a further description of the above technical solution:

[0019] The positioning rod passes through the second positioning hole and is connected to the inside of the first positioning hole.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0021] In the utility model, the connecting bar can drive the fixed knife to move in a limited position by providing an arc-shaped movable plate, a sliding groove and a sliding block, etc., so as to avoid the fixed knife from being misplaced, thereby facilitating the wire cutting work. At the same time, the screw is positioned by two nuts with opposite directions at the bottom end of the screw, and the two nuts can also be limited by a positioning rod, so as to prevent the nut from loosening under long-term use, causing the fixed knife and the movable knife to be misplaced, which has a certain impact on the wire cutting work. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a scissor assembly of a double-needle chain-type reeling machine in the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the bottom end portion of the bottom plate of the utility model;

[0024] Figure 3 for Figure 1 The enlarged structural diagram at A in the middle;

[0025] Figure 4 This is a schematic diagram of the surface structure of the screw in the utility model;

[0026] Figure 5 for Figure 2 The enlarged structural diagram at B in the middle;

[0027] Figure 6 This is a schematic diagram of the surface structure of the nut in the utility model;

[0028] Figure 7 It is a schematic diagram of the internal structure of the connecting block pipe in the utility model.

[0029] Legend:

[0030] 1. Bottom plate; 2. Screw rod; 3. Connecting strip; 4. Moving knife; 5. Hole groove; 6. Fixed knife; 7. Partition plate; 8. Movable shaft; 9. Connecting rod; 10. Cylinder; 11. Moving plate; 12. Slide groove; 13. First thread groove; 14. Second thread groove; 15. First nut; 16. Second nut; 17. Second positioning hole; 18. First positioning hole; 19. Connecting block; 20. Spring; 21. Positioning rod; 22. Pull rod; 23. Ring plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1-7 A double-needle chain roller foot machine scissors assembly, comprising a screw 2 arranged at the top of a bottom plate 1, a connecting strip 3 arranged on the surface of the screw 2, a movable knife 4 arranged on the surface of the connecting strip 3, a hole groove 5 arranged on the surface of the bottom plate 1, a fixed knife 6 arranged at the top of the bottom plate 1, a partition 7 slidably arranged on the surface of the connecting strip 3, a movable shaft 8 arranged at the top of the partition 7, a connecting rod 9 arranged on the surface of the movable shaft 8, and a cylinder 10 arranged at the other end of the connecting rod 9;

[0033] A movable plate 11 is connected to one side of the connecting strip 3, and a sliding groove 12 is provided at the top of the bottom plate 1;

[0034] The surface of the screw rod 2 is provided with a first thread groove 13 and a second thread groove 14, and the screw rod 2 passes through the bottom plate 1 and is connected with a first nut 15 and a second nut 16 respectively;

[0035] A first positioning hole 18 is formed on the surface of the first nut 15, and a second positioning hole 17 is formed on the surface of the second nut 16;

[0036] A connecting block 19 is provided at the bottom end of the second nut 16, and a spring 20 is connected to the inside of the connecting block 19, a positioning rod 21 is connected to the top end of the spring 20, and a pull rod 22 is connected to the bottom end of the positioning rod 21, and a ring plate 23 is connected to the bottom end of the pull rod 22. A through groove is provided on the surface of the bottom plate 1, and the movable plate 11 is slidably connected to the inside of the through groove to facilitate the limited movement of the connecting strip 3. Two hole grooves 5 are provided at the top end of the bottom plate 1 to facilitate the two needles of the reeling machine to thread the sewing needles.

[0037] Furthermore, the movable plate 11 and the slide groove 12 are arranged in an arc shape. When the cylinder 10 is working, the connecting bar 3 makes a circular motion around the screw 2, and the movable plate 11 and the slide groove 12 are all on the trajectory of the circular motion, which facilitates the connecting bar 3 to perform limited movement through the movable plate 11, the slide groove 12 and the slider.

[0038] Furthermore, a slider is slidably connected inside the slide groove 12, and the slider is connected to the bottom end of the connecting strip 3. The slider 12 and the slide groove facilitate the limited movement of the connecting strip 3 to avoid misalignment between the connecting strip 3 and the movable knife 4.

[0039] Furthermore, the first nut 15 is connected to the surface of the first thread groove 13, and the second nut 16 is connected to the surface of the second thread groove 14. The first thread groove 13 and the second thread groove 14 are arranged oppositely. When the first nut 15 and the second nut 16 are connected to the screw rod 2, their directions are opposite, which facilitates the limiting of the first nut 15 by the second nut 16.

[0040] Furthermore, the positioning rod 21 passes through the second positioning hole 17 and is connected to the inside of the first positioning hole 18. The positioning rod 21 is connected to the second positioning hole 17 and the inside of the first positioning hole 18, so that the first nut 15 and the second nut 16 can be fixed on the surface of the screw 2 to prevent the nut from loosening on the surface of the screw 2, causing misalignment between the connecting strip 3 and the movable knife 4.

[0041] Working principle: When in use, the cylinder 10 can push the connecting rod 9, the partition 7 and the movable shaft 8 to move, so that the connecting strip 3 connected to one side of the partition 7 can be moved inside the slide groove 12 through the slider, and the movable plate 11 can be limited on the surface of the bottom plate 1. The connecting strip 3 can drive the movable knife 4 to move in a limited manner, which is convenient for cutting the wire through the cooperation of the movable knife 4 and the fixed knife 6. At the same time, the screw 2, the connecting strip 3 and the movable knife 4 can be limited by two nuts with opposite directions. The two nuts can be limited by the positioning rod 21 connected to the first positioning hole 18 and the inside of the second positioning hole 17 to avoid the nuts from loosening under long-term use, thereby causing the connecting strip 3 and the movable knife 4 to be misaligned, affecting the wire cutting work.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-needle chain-type roller-foot machine scissors assembly, comprising a screw (2) arranged at the top end of a bottom plate (1), a connecting strip (3) arranged on the surface of the screw (2), a movable knife (4) arranged on the surface of the connecting strip (3), a hole groove (5) arranged on the surface of the bottom plate (1), a fixed knife (6) arranged at the top end of the bottom plate (1), a partition (7) slidably arranged on the surface of the connecting strip (3), a movable shaft (8) arranged at the top end of the partition (7), a connecting rod (9) arranged on the surface of the movable shaft (8), and a cylinder (10) arranged at the other end of the connecting rod (9), characterized in that: A movable plate (11) is connected to one side of the connecting strip (3), and a sliding groove (12) is provided at the top of the bottom plate (1); The surface of the screw rod (2) is respectively provided with a first thread groove (13) and a second thread groove (14), and the screw rod (2) passes through the bottom plate (1) and is respectively connected with a first nut (15) and a second nut (16); A first positioning hole (18) is formed on the surface of the first nut (15), and a second positioning hole (17) is formed on the surface of the second nut (16); A connecting block (19) is provided at the bottom end of the second nut (16), and a spring (20) is connected inside the connecting block (19), the top end of the spring (20) is connected to a positioning rod (21), and the bottom end of the positioning rod (21) is connected to a pull rod (22), and the bottom end of the pull rod (22) is connected to an annular plate (23).

2. A double-needle chain-type reeling machine scissors assembly according to claim 1, characterized in that: The movable plate (11) and the sliding groove (12) are arranged in an arc shape.

3. A double needle chain reeling machine scissors assembly according to claim 1, characterized in that: A sliding block is slidably connected inside the sliding groove (12), and the sliding block is connected to the bottom end of the connecting strip (3).

4. A double-needle chain-type reeling machine scissors assembly according to claim 1, characterized in that: The first nut (15) is connected to the surface of the first thread groove (13), and the second nut (16) is connected to the surface of the second thread groove (14).

5. A double needle chain reeling machine scissors assembly according to claim 1, characterized in that: The positioning rod (21) passes through the second positioning hole (17) and is connected to the inside of the first positioning hole (18).

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