Main shaft driving mechanism of template sewing machine

Abstract

The utility model discloses a main shaft driving mechanism of a template sewing machine, which comprises a first driving motor and a second driving motor, wherein the first driving motor is arranged in a sewing machine head and is used for driving a machine needle to work; the second driving motor is arranged in a shell base and is used for driving a bottom shuttle to rotate; the first driving motor and the second driving motor work synchronously; a first connecting rod and a second connecting rod are arranged in the sewing machine head, a driving shaft of the first driving motor is connected with one end of the first connecting rod through a first coupler, a rotatable cam is arranged at the other end of the first connecting rod, and the cam is rotationally connected with a first connecting handle and a second connecting handle; a take-up lever is arranged at the other end of the first connecting handle; the other end of the second connecting handle is connected with a second connecting rod, and a machine needle is installed at the lower end of the second connecting rod.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sewing machine field, concretely is a kind of main shaft drive mechanism of template sewing machine. BACKGROUND

[0002] Patent No.202111333025.4 discloses a driving structure and a sewing machine with the same, the driving structure is arranged in the shell of the sewing machine, and the driving structure comprises: a first driving assembly, the first driving assembly has a first driving shaft, the first driving shaft is connected with a thread piercing component of the sewing machine to drive the first driving shaft to rotate and thereby drive the thread piercing component to move; a second driving assembly, the second driving assembly has a second driving shaft, the second driving shaft is connected with a rotating shuttle component of the sewing machine to drive the first driving shaft to rotate and thereby drive the rotating shuttle component to rotate; wherein, the first driving assembly and the second driving assembly are arranged at intervals, and the first driving shaft and the second driving shaft are arranged in parallel with each other.

[0003] There are certain defects in the patent disclosure, when the first driving motor drives the thread piercing component to move up and down, the amplitude of the thread piercing component moving up and down is too small, and the applicability is poor. When the crank component swings, the connecting rod component drives the pressure rod component to swing, and the position of the thread piercing component below the pressure rod component will deviate, resulting in unstable final sewing effect. SUMMARY

[0004] The utility model discloses in view of the technical problem that the driving structure of large template sewing machine is not easy to arrange, the production cost of longer main shaft is high and high-speed sewing cannot be realized, and provides a kind of main shaft drive mechanism of template sewing machine, by being arranged in the first driving motor and the second driving motor of synchronous work in sewing machine head and shell base, avoid longer main shaft design, reduce production cost, improve sewing speed.

[0005] The utility model discloses the technical scheme that the above-mentioned technical problem is adopted: a kind of main shaft drive mechanism of template sewing machine, including the first driving motor for driving needle work being installed in sewing machine head, and the second driving motor for driving bottom shuttle rotation being installed in shell base;The first driving motor and the second driving motor work synchronously;Sewing machine head is equipped with first connecting rod and second connecting rod, and the driving shaft of first driving motor is connected with the one end of first connecting rod by first coupling, and the other end of first connecting rod is equipped with rotatable cam, and the cam is rotatably connected with first connecting handle, second connecting handle;The other end of first connecting handle is made with thread lifting rod;The other end of second connecting handle is connected with second connecting rod, and the lower end of second connecting rod is installed with needle.

[0006] To optimize the above technical solution, the utility model further includes the following improved technical solutions.

[0007] The third connecting rod and the fourth connecting rod are arranged in the shell base; the second driving motor is connected with one end of the third connecting rod through a first synchronous belt; the third connecting rod is provided with a first gear, and the fourth connecting rod is provided with a second gear meshing with the first gear; the fourth connecting rod is provided with a hooking piece, and a wire hook is arranged on the front part of the hooking piece, and a hooking groove is arranged between the wire hook and the hooking piece.

[0008] The cam is provided with a first central hole and a first eccentric hole, the other end of the first connecting rod is fixedly installed in the first central hole of the cam, and a first connecting piece is fixedly installed in the first eccentric hole; one end of the first connecting handle is rotationally connected with the first connecting piece, the other end of the first connecting handle is rotationally installed with a fixing piece, and the other end of the fixing piece is fixedly connected with the sewing machine head.

[0009] One end of the second connecting handle is rotationally connected with the first connecting piece, and the other end of the second connecting handle is rotationally installed with a second connecting piece, and one end of the second connecting piece is locked on the second connecting rod.

[0010] The second connecting piece is slidably installed in the sliding groove through a sliding block, and the second connecting piece can move up and down along the sliding groove.

[0011] Both ends of the third connecting rod are rotationally connected with the shell base through third bearings, one end of the fourth connecting rod is rotationally connected with the shell base through a fourth bearing and a fourth shaft sleeve, and the other end of the fourth connecting rod is provided with a second coupling, and the other end of the fourth connecting rod is rotationally connected with the shell base through the second coupling.

[0012] The driving shaft of the second driving motor is provided with a first synchronous wheel, one end of the third connecting rod is provided with a second synchronous wheel, and the first synchronous belt is sleeved on the first synchronous wheel and the second synchronous wheel; the second synchronous wheel is rotationally installed in the shell base through a second bearing; and the second coupling is provided with a mounting ring, and the hooking piece is fixed on the mounting ring through screws.

[0013] Compared with the prior art, the main shaft driving mechanism of the template sewing machine can increase the amplitude of the needle moving up and down, so that the needle can pierce through sewing materials of different thicknesses, and the applicability of the device is improved. Meanwhile, the needle can more accurately pierce down the sewing material along the sliding groove, the interval of the needle piercing the sewing material is consistent, and the sewing effect is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a schematic diagram of the three-dimensional structure of the sewing machine.

[0015] Fig. 2 It is a schematic diagram of the three-dimensional structure of the driving mechanism.

[0016] Fig. 3It is a three-dimensional structure explosion schematic diagram of the driving mechanism. DETAILED DESCRIPTION

[0017] The embodiments of the utility model will be further described in detail below with reference to the drawings.

[0018] Figs. 1 to 3 It is the structural schematic diagram of the utility model.

[0019] The figure mark is: sewing machine head 1, machine shell base 2, first drive motor 3, first motor mounting plate 4, first connecting rod 5, first coupling 6, cam 7, first center hole 7a, first eccentric hole 7b, counterweight 8, first connecting piece 9, first connecting handle 10, second connecting handle 11, fixing piece 12, thread tension lever 13, second connecting piece 14, second connecting rod 15, sliding block 16, mounting block 17, sliding slot 17a, needle 18, second drive motor 19, second motor mounting plate 20, third connecting rod 21, first synchronous wheel 22, second synchronous wheel 23, second bearing 24, first synchronous belt 25, third bearing 26, fourth connecting rod 27, fourth bearing 28, fourth shaft sleeve 29, first gear 30, second gear 31, second coupling 32, mounting ring 33, thread hooking piece 34, thread hooking 34a, thread hooking groove 34b.

[0020] As shown in Fig. 1 and Fig. 2 The utility model discloses a main shaft driving mechanism of template sewing machine, including the first drive motor 3 of installation in sewing machine head 1 and the second drive motor 19 of installation in machine shell base 2. The needle 18 of sewing machine head 1 is always aligned with the bottom shuttle, moves up and down through the first drive motor 3 drive needle 18, through the second drive motor 19 drive thread hooking piece 34 and hook the thread rotation, optimize the transmission structure, improve the sewing effect.

[0021] As shown in Fig. 3 The first drive motor 3 is fixedly installed in the sewing machine head 1 through the first motor mounting plate 4, and the first connecting rod 5 rotatable is arranged in the sewing machine head 1, and the driving shaft of the first drive motor 3 is fixedly connected with one end of the first connecting rod 5 through the first coupling 6. The other end of the first connecting rod 5 is provided with the rotatable cam 7, and the cam 7 is provided with the first center hole 7a and the first eccentric hole 7b.

[0022] The other end of the first connecting rod 5 is fixedly installed in the first center hole 7a of the cam 7, and the first drive motor 3 can drive the cam 7 on the first connecting rod 5 to rotate. The counterweight 8 is also installed on the first connecting rod 5, and the counterweight 8 and the cam 7 achieve dynamic balance effect when the cam 7 rotates, avoiding the up and down vibration loss of the first connecting rod 5 when rotating.

[0023] The cam 7 is connected to the first connecting handle 10 and the second connecting handle 11 via the first connecting member 9. The first connecting member 9 is fixedly installed in the first eccentric hole 7b of the cam 7. One end of the first connecting handle 10 is rotatably connected to the first connecting member 9, and the other end of the first connecting handle 10 is rotatably mounted with a fixing member 12, the other end of which is fixedly connected to the sewing machine head 1. When the cam 7 rotates, the cam 7 drives the first connecting member 9 to rotate around the first central hole 7a, and the first connecting member 9 drives the first connecting handle 10 to rotate. The other end of the first connecting handle 10 is provided with a thread take-up lever 13, which can tighten the loose thread when the first connecting handle 10 rotates.

[0024] One end of the second connecting handle 11 is rotatably connected to the first connecting member 9, and the other end of the second connecting handle 11 is rotatably mounted with the second connecting member 14. A second connecting rod 15, capable of moving up and down, is provided inside the sewing machine head 1. One end of the second connecting member 14 is locked onto the second connecting rod 15. A mounting block 17 is fixedly installed inside the sewing machine head 1. The mounting block 17 has a vertically oriented sliding groove 17a. The other end of the second connecting member 14 is slidably mounted in the sliding groove 17a via a slider 16, allowing the second connecting member 14 to move up and down along the sliding groove 17a. The first connecting member 9 drives the second connecting handle 11 to rotate, the second connecting handle 11 drives the second connecting member 14 to move up and down along the sliding groove 17a, and the second connecting member 14 drives the second connecting rod 15 to move up and down along the sliding groove 17a. A needle 18 is fixedly mounted at the lower end of the second connecting rod 15, and the second connecting rod 15 drives the needle 18 to move up and down along the sliding groove 17a.

[0025] In this embodiment, the cam 7 drives the second connecting handle 11 to rotate, which in turn drives the second connecting rod 15 to move up and down. The needle 18 at the lower end of the second connecting rod 15 moves up and down to a greater extent, allowing the needle 18 to pierce fabrics of different thicknesses, thus improving the applicability of the device. At the same time, the position of the needle 18 piercing the fabric downward along the slide groove 17a is more precise, and the interval of the needle 18 piercing the fabric is consistent, effectively improving the sewing effect.

[0026] The second drive motor 19 is fixedly mounted inside the housing base 2 via the second motor mounting plate 20. The drive shaft of the second drive motor 19 is fixedly connected to the first synchronous pulley 22. A rotatable third connecting rod 21 is provided inside the housing base 2. Both ends of the third connecting rod 21 are connected to the housing base 2 via third bearings 26. A second synchronous pulley 23 is provided at one end of the third connecting rod 21. The second synchronous pulley 23 is rotatably mounted inside the housing base 2 via a second bearing 24. The second synchronous pulley 23 is fixedly connected to one end of the third connecting rod 21, and the second synchronous pulley 23 can drive the third connecting rod 21 to rotate. A first synchronous belt 25 is sleeved on the first synchronous pulley 22 and the second synchronous pulley 23. The second drive motor 19 drives the first synchronous belt 25 to rotate, and the first synchronous belt 25 drives the third connecting rod 21 to rotate.

[0027] The fourth connecting rod 27 is rotatably arranged in the casing base 2, and one end of the fourth connecting rod 27 is rotatably connected with the casing base 2 through a fourth bearing 28 and a fourth shaft sleeve 29. A first gear 30 is fixedly arranged on the third connecting rod 21, and a second gear 31 meshing with the first gear 30 is fixedly arranged on the fourth connecting rod 27. When the third connecting rod 21 is rotated by the second driving motor 19, the first gear 30 on the third connecting rod 21 can drive the second gear 31 on the fourth connecting rod 27 to rotate.

[0028] The other end of the fourth connecting rod 27 is provided with a second coupling 32, and the other end of the fourth connecting rod 27 is rotatably connected with the casing base 2 through the second coupling 32. The front end of the second coupling 32 is provided with a mounting ring 33, and a hooking wire piece 34 is fixed on the mounting ring 33 through screws. The hooking wire piece 34 is provided with a wire hook 34a at the front part, and a hooking wire groove 34b is arranged between the wire hook 34a and the hooking wire piece 34. When the hooking wire piece 34 is rotated by the fourth connecting rod 27, the wire hook 34a hooks the machine wire on the machine needle 18, the machine wire moves inward relative to the hooking wire piece 34 along the hooking wire groove 34b, and the hooking wire piece 34 drives the machine wire to rotate.

[0029] The best embodiment of the utility model has been illustrated, and various changes or modifications made by those skilled in the art will not deviate from the scope of the utility model.

Claims

1. A spindle drive mechanism for a template sewing machine, characterized by: The utility model relates to a sewing machine head (1) for driving the needle (18) work of first drive motor (3) for driving the bottom shuttle rotation of second drive motor (19) for installing in the machine shell base (2), first drive motor (3) and second drive motor (19) synchronous operation, the sewing machine head (1) is equipped with first connecting rod (5) and second connecting rod (15), the drive shaft of first drive motor (3) is connected with the one end of first connecting rod (5) through first coupling (6), the other end of first connecting rod (5) is equipped with rotatable cam (7), first connecting handle (10) is rotatably connected with second connecting handle (11) of cam (7), the other end of first connecting handle (10) is made with thread tension lever (13), the other end of second connecting handle (11) is connected with second connecting rod (15), and the needle (18) is installed at the lower end of second connecting rod (15).

2. A main shaft driving mechanism of a stencil sewing machine according to claim 1, characterized in that: The machine shell base (2) is equipped with third connecting rod (21) and fourth connecting rod (27), and the one end of second drive motor (19) is connected with the one end of third connecting rod (21) through first synchronous belt (25), the third connecting rod (21) is equipped with first gear (30), the fourth connecting rod (27) is equipped with second gear (31) meshing with first gear (30), the fourth connecting rod (27) is equipped with thread hooking piece (34), the front part of thread hooking piece (34) is made with thread hook (34a), and the thread hook (34a) is made with thread hooking groove (34b) between the thread hook (34a) and the thread hooking piece (34).

3. The main shaft driving mechanism of a template sewing machine according to claim 2, characterized in that the cam (7) is made with a first center hole (7a) and a first eccentric hole (7b), the other end of the first connecting rod (5) is fixedly installed in the first center hole (7a) of the cam (7), and a first connecting piece (9) is fixedly installed in the first eccentric hole (7b); one end of the first connecting handle (10) is rotatably connected with the first connecting piece (9), the other end of the first connecting handle (10) is rotatably installed with a fixing piece (12), and the other end of the fixing piece (12) is fixedly connected with the sewing machine head (1).

4. A main shaft drive mechanism for a stencil sewing machine according to claim 3, characterized in that: One end of the second connecting handle (11) is rotatably connected with the first connecting piece (9), and the other end of the second connecting handle (11) is rotatably installed with a second connecting piece (14), and one end of the second connecting piece (14) is locked on the second connecting rod (15).

5. A main shaft drive mechanism for a stencil sewing machine according to claim 4, characterized in that: A mounting block (17) is fixedly installed in the sewing machine head (1), the mounting block (17) is made with a vertical sliding groove (17a), the other end of the second connecting piece (14) is slidably installed in the sliding groove (17a) through a sliding block (16), and the second connecting piece (14) can move up and down along the sliding groove (17a).

6. A spindle drive mechanism for a stencil sewing machine according to claim 5, characterized in that: Both ends of the third connecting rod (21) are rotatably connected with the machine shell base (2) through third bearings (26), one end of the fourth connecting rod (27) is rotatably connected with the machine shell base (2) through a fourth bearing (28) and a fourth shaft sleeve (29), the other end of the fourth connecting rod (27) is provided with a second coupling (32), and the other end of the fourth connecting rod (27) is rotatably connected with the machine shell base (2) through the second coupling (32).

7. A main shaft drive mechanism for a stencil sewing machine according to claim 6, characterized in that: The driving shaft of the second driving motor (19) is provided with a first synchronous wheel (22), one end of the third connecting rod (21) is provided with a second synchronous wheel (23), and the first synchronous belt (25) is sleeved on the first synchronous wheel (22) and the second synchronous wheel (23); the second synchronous wheel (23) is rotatably installed in the machine shell base (2) through a second bearing (24); and the second coupling (32) is provided with a mounting ring (33) at the front end, and a hook wire piece (34) is fixed on the mounting ring (33) through a screw.

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