A button sewing machine

Abstract

The present application belongs to the technical field of sewing machines, and particularly relates to a button sewing machine, which comprises a thread cutting driving rod, the upper end of the thread cutting driving rod is formed with a thread cutting fork for being pushed by a cam, and the lower end of the thread cutting driving rod is connected with a thread cutting connecting rod assembly; the middle end of a lifting and pressing lever is rotatably arranged in a machine body, one end of the lifting and pressing lever is formed with a pushing part for being pushed by the cam, the other end of the lifting and pressing lever is connected with a lifting and pressing foot assembly, and the lifting and pressing lever is formed with a thread loosening part one; the lower end of a thread loosening driving rod is formed with a thread loosening fork for being pushed by the thread loosening part one, and the upper end of the thread loosening driving rod is connected with a thread loosening assembly; in the rotating process of the cam, the thread cutting fork on one side is first pushed to execute a thread cutting action through the thread cutting connecting rod assembly, and then the lifting and pressing lever is pushed to execute a lifting and pressing foot action through the lifting and pressing foot assembly, so that the thread cutting and the lifting and pressing foot process are completed in a sequence.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, and specifically to a button attaching machine. Background Technology

[0002] Existing button-attaching machines typically have a presser foot lifting mechanism, a thread cutting mechanism, and a thread loosening mechanism, which are usually driven by mechanical force or electromagnets.

[0003] For example, Chinese Utility Model Publication No. CN217459840U discloses a sewing machine comprising: a frame with a first drive rod and a second drive rod hinged to it; a drive disc disposed between the first and second drive rods, wherein the hinge axis of the first drive rod, the hinge axis of the second drive rod, and the axis of the drive disc are arranged parallel to each other; a protrusion on the drive disc, wherein when the drive disc rotates at a first angle in a preset direction, the protrusion contacts one end of the first drive rod to drive the first drive rod to rotate, and when the drive disc rotates at a second angle in the opposite direction of the preset direction, the protrusion contacts one end of the second drive rod to drive the second drive rod to rotate; a drive member connected to the drive disc for driving the drive disc to rotate; a thread cutting mechanism connected to the other end of the first drive rod; and a presser foot mechanism connected to the other end of the second drive rod.

[0004] By using a motor to drive the drive disc to rotate forward and backward, the thread trimming and presser foot lifting processes are completed sequentially, thus solving the technical problem of long thread ends on the finished product caused by simultaneous thread trimming and presser foot lifting in related technologies. However, the structure of this thread trimming and presser foot lifting mechanism is complex. When the drive disc rotates forward, it drives the thread trimming mechanism to complete the thread trimming action. Then, the drive disc rotates backward to drive the presser foot lifting mechanism to complete the presser foot lifting action, resulting in a slow response speed and complex installation and debugging. Therefore, further improvements to this structure are needed. Summary of the Invention

[0005] The purpose of this invention is to provide a button-attaching machine that solves the problems of speed limitations, high vibration and noise during high-speed operation, lack of automatic oil supply, and instability of the presser foot by a reasonable new structural design.

[0006] The object of this invention is achieved as follows: a button-attaching machine, comprising... The machine base and the machine body are equipped with a stepper motor on the side of the machine body, and a cam is installed on the output shaft of the stepper motor. A servo spindle motor is installed at the rear of the machine body. The output shaft of the servo spindle motor is coaxially connected to the sewing machine spindle. The other end of the sewing machine spindle is connected to the needle bar assembly. A synchronous belt drive mechanism is installed between the sewing machine spindle and the lower shaft of the sewing machine. The other end of the lower shaft of the sewing machine is connected to a hook assembly, and an oil pump assembly is installed inside the machine base; The wire cutting drive rod has a wire cutting fork formed at its upper end for the cam to push, and a wire cutting connecting rod assembly connected to its lower end. The lifting lever has its middle end rotatably mounted inside the machine body. One end of the lifting lever is formed with a pushing part for the cam to push, and the other end of the lifting lever is connected to a lifting foot assembly. When the cam rotates at a first angle in a preset direction, the cam pushes one side of the wire-cutting fork to perform the wire-cutting action through the wire-cutting linkage assembly; When the cam rotates at a second angle along a preset direction, the cam pushes the other side of the wire cutting fork to force the wire cutting linkage assembly to reset; the cam pushes the lifting lever to perform the lifting action of the pressure foot through the lifting pressure foot assembly.

[0007] Preferably, the wire-cutting fork includes a wire-cutting part and a resetting part.

[0008] Preferably, the lifting lever includes an upper and lower lever one and an upper and lower lever two. One end of the upper and lower lever one has a fixing hole, and one end of the upper and lower lever two has a strip-shaped adjustment hole two. A connecting shaft is installed between the upper and lower lever one and the upper and lower lever two.

[0009] Preferably, the machine body is provided with two stepper motors, and the output shafts of the two stepper motors are respectively equipped with swing arms, the other end of which is connected to a feeding slide plate.

[0010] Preferably, the synchronous belt drive mechanism includes a drive wheel installed on the outer periphery of the sewing machine main shaft and a driven wheel installed on the outer periphery of the sewing machine lower shaft, with a drive belt connecting the driven wheel and the drive wheel.

[0011] Preferably, the base is equipped with an oil tank, an oil pump, and a lower diverter valve, while the body of the machine is equipped with an upper diverter valve. The oil tank is connected to an oil suction pipe (first type), the other end of which is connected to a three-way valve. The outlet of the three-way valve is connected to an oil suction pipe (second type), the other end of which is connected to the oil pump. The output end of the oil pump is connected to an oil outlet pipe (third type), which is connected to the upper end of the upper diverter valve. The lower end of the upper diverter valve is connected to an oil-leading sponge (first type) and an oil outlet pipe (fourth type), with the other end of the oil-leading sponge extending to the machine... Inside the head, oil is supplied to the needle rod assembly. The lower end of the head is connected to a return oil pipe 1, the other end of which is connected to a three-way valve. The other end of the outlet oil pipe 4 is connected to the upper end of the lower diverter valve. The lower end of the lower diverter valve is connected to an oil-leading cotton 2 and an oil return pipe 2. The other end of the oil-leading cotton 2 extends to the front end of the machine base, thus supplying oil to the hook line assembly. The other end of the oil return pipe 2 is connected to the oil tank. The lower end of the machine body is connected to an oil return pipe 4, the other end of which is connected to the oil tank.

[0012] Preferably, the needle bar assembly includes a needle bar crank disposed at the end of the sewing machine spindle, an eccentric portion of the needle bar crank is connected to a needle bar connecting rod, and a needle bar clamping block is disposed at the end of the needle bar connecting rod. The needle bar clamping block is fixed on the outer periphery of the needle bar, thereby driving the needle bar to move up and down reciprocally.

[0013] Preferably, the lifting lever has a loosening section, the lower end of the loosening drive rod has a loosening fork for pushing the loosening section, and the upper end of the loosening drive rod is connected to a loosening assembly. When the cam rotates a second angle along a preset direction, the lifting lever pushes the loosening drive rod to perform the loosening action through the loosening assembly.

[0014] Preferably, the wire loosening assembly includes a wire guide plate with a wire guide hole. The wire guide plate has a through slot for the upper end of the wire loosening drive rod to extend out, and the upper end of the wire loosening drive rod has a wire guide hole. The wire guide plate is provided with a wire clamping block and a movable wire plate. The movable wire plate has a wire clamping plate formed on it, and a wire guide space is formed between the wire clamping plate and the wire clamping block. One end of the movable wire plate is rotatably connected to the machine body. A spring is connected between the movable wire plate and the machine body to drive the wire clamping plate to move towards the side closer to the wire clamping block. One end of the movable wire plate has a wire loosening part for the upper end of the wire loosening drive rod to push.

[0015] Preferably, the wire guide plates are respectively disposed on both sides of the through groove, and the wire guide plates are provided with a strip-shaped adjustment hole for fasteners to pass through; the upper end of the wire loosening drive rod is formed with a protrusion for pushing the wire loosening part two, and the side of the wire loosening part two is formed with a protrusion two; a rotating shaft is installed in the middle of the wire clamping block, and the wire clamping block is rotatably disposed on the wire guide plate.

[0016] The outstanding and beneficial technical effects of this invention compared to the prior art are: This invention, through the design of a cam, ensures that during actual operation, the cam, while rotating, first pushes one side of the wire-cutting fork to perform the wire-cutting action via the wire-cutting linkage assembly. Then, it pushes the lifting lever to perform the lifting of the pressure foot via the lifting pressure foot assembly. This achieves the sequential completion of the wire-cutting and pressure foot-lifting processes, thus solving the problem of excessively long wire ends after cutting caused by simultaneous lifting of the pressure foot and wire-cutting in existing technologies. Furthermore, while lifting the pressure foot, the cam pushes the other side of the wire-cutting fork to force the wire-cutting linkage assembly to reset, making this mechanical structure reliable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0019] Figure 3This is a schematic diagram of the structure of the present invention. Figure 3 .

[0020] Figure 4 This is a schematic diagram of the structure during wire cutting according to the present invention.

[0021] Figure 5 This is a schematic diagram of the structure when the presser foot of the present invention is raised.

[0022] Figure 6 This is a schematic diagram of the loose wire assembly when it is not in operation.

[0023] Figure 7 This is a schematic diagram of the working structure of the loose wire assembly.

[0024] Figure 8 This is a schematic diagram of the internal oil supply structure of the present invention. Figure 1 .

[0025] Figure 9 This is a schematic diagram of the internal oil supply structure of the present invention. Figure 2 .

[0026] Reference numerals: 1-Main body; 2-Stepper motor 1; 3-Cam; 4-Wire cutting drive rod; 5-Wire cutting fork; 6-Wire cutting linkage assembly; 7-Lifting lever; 8-Pushing part; 9-Lifting pressure foot assembly; 10-Wire loosening part 1; 11-Wire release drive rod; 12-Wire release fork; 13-Wire release assembly; 14-Wire guide plate; 15-Wire guide hole one; 16-Through groove; 17-Second wire hole; 18-Wire clamping block; 19-Modible wire plate; 20-Wire clamping plate; 21-Wire passage space; 22-Second wire loosening section; 23-First strip adjustment hole; 24-First protrusion; 25-Second protrusion; 26-Rotating shaft; 27-Wire cutting section; 28-Reset section; 29-Upper and lower lever one; 30-Upper and lower lever two; 31-Strip adjustment hole two; 32-Connecting shaft; 33-Stepper motor two; 34-Swing arm; 35-Feeding slide plate; 36-Servo spindle motor; 37-Sewing machine main shaft; 38-Sewing machine lower shaft; 39-Synchronous belt drive mechanism; 40-Drive pulley; 41-Driven pulley; 42-Drive belt; 45-Needle bar assembly; 46-Hook assembly; 47-Oil tank; 48-Oil pump; 49-Lower diverter valve; 50-Upper diverter valve; 51-Suction pipe one; 52-Three-way valve; 53-Suction pipe two; 54-Outlet pipe three; 55-Oil-leading cotton one; 56-Outlet pipe four; 57-Return oil pipe one; 58-Oil-leading cotton two; 59-Return oil pipe two; 60-Return oil pipe four; 61-Needle bar crank; 62-Needle bar connecting rod; 63-Needle bar clamp; 64-Needle bar. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] A button-attaching machine, including The machine base and the machine body 1 are equipped with a stepper motor 2 mounted on the side of the machine body 1. A cam 3 is mounted on the output shaft of the stepper motor 2 to control the wire cutting, pressing foot lifting and wire loosening actions respectively. A servo spindle motor 36 is installed at the rear end of the machine body 1. The output shaft of the servo spindle motor 36 is coaxially connected to the sewing machine spindle 37. The other end of the sewing machine spindle 37 is connected to the needle bar assembly 45. A synchronous belt drive mechanism 39 is installed between the sewing machine spindle 37 and the lower shaft 38 of the sewing machine. The other end of the lower shaft 38 of the sewing machine is connected to a hook assembly 46, and an oil pump assembly 47 is installed inside the machine base; The needle bar assembly 45 and the hook line assembly 46 are existing components in the button attaching machine.

[0029] The upper end of the wire-cutting drive rod 4 is formed with a wire-cutting fork 5 for the cam 3 to push, and the lower end of the wire-cutting drive rod 4 is connected to a wire-cutting connecting rod assembly 6. During the rotation of the cam 3, it will push the wire-cutting fork 5 to drive the wire-cutting drive rod 4 to move, thereby performing the wire-cutting action. The lifting lever 7 is rotatably mounted in the machine body 1. One end of the lifting lever 7 is formed with a pushing part 8 for the cam 3 to push. The other end of the lifting lever 7 is connected to a lifting foot assembly 9. During the rotation of the cam 3, it will push the pushing part 8 to drive the lifting lever 7 to move, thereby performing the lifting foot action. The lifting lever 7 is formed with a loosening part 10. The lower end of the wire release drive rod 11 is formed with a wire release fork 12 for the wire release part 10 to push. The upper end of the wire release drive rod 11 is connected to the wire release assembly 13. During the operation of the lifting lever 7, the wire release drive rod 11 will also be pushed by the wire release part 10 and the wire release fork 12, so that the wire release assembly 13 will perform the wire release action. When the cam 3 rotates at a first angle in a preset direction, the cam 3 pushes one side of the wire cutting fork 5 to perform the wire cutting action through the wire cutting linkage assembly 6; When the cam 3 rotates at a second angle along a preset direction, the cam 3 pushes the other side of the wire cutting fork 5 to force the wire cutting linkage assembly 6 to reset; the cam 3 pushes the lifting lever 7 to perform the lifting action of the pressure foot assembly 9; the lifting lever 7 pushes the wire loosening drive rod 11 to perform the wire loosening action of the wire loosening assembly 13.

[0030] This invention uses a single stepper motor to drive the wire cutting and pressing foot lifting actions separately. Compared with the existing technology that uses electromagnets, this method reduces costs, increases stability, is less prone to damage, and has a longer service life.

[0031] This invention, through the design of a cam, ensures that during actual operation, the cam 3, while rotating, first pushes one side of the wire-cutting fork 5 to perform the wire-cutting action via the wire-cutting linkage assembly 6. Then, it pushes the lifting lever 7 to perform the lifting presser foot action via the lifting presser foot assembly 9. This achieves the sequential completion of the wire-cutting and presser foot lifting processes, thus solving the problem of excessively long wire ends after cutting caused by simultaneous lifting of the presser foot and wire-cutting in existing technologies. Furthermore, while lifting the presser foot, the cam 3 pushes the other side of the wire-cutting fork 5 to force the wire-cutting linkage assembly 6 to reset. This mechanical structure is reliable and will not cause safety hazards due to failure to reset, improving the stability of the wire-cutting and presser foot lifting actions.

[0032] The loosening assembly 13 includes a wire guide plate 14, with a wire guide hole 15 inside the wire guide plate 14. The body 1 has a through groove 16 for the upper end of the loosening drive rod 11 to extend out. The upper end of the loosening drive rod 11 has a wire guide hole 17. The wire guide plate 14 is respectively provided with a wire clamping block 18 and a movable wire plate 19. A wire clamping plate 20 is formed on the movable wire plate 19. A wire guide space 21 is formed between the wire clamping plate 20 and the wire clamping block 18. One end of the movable wire plate 19 is rotatably connected to the body 1. A spring is connected between the movable wire plate 19 and the body 1 to drive the wire clamping plate 20 to move towards the side closer to the wire clamping block 18. One end of the movable wire plate 19 is formed with a loosening part 22 for the upper end of the loosening drive rod 11 to push.

[0033] Through the design of this loose wire assembly 13, the present invention first examines the following during normal operation: Figure 6 The upper end of the thread loosening drive rod 11 abuts against the thread loosening part 22, thereby allowing the thread to move within the thread guide hole 15, the thread guide hole 17, and the thread guide space 21. When the presser foot is lifted, the thread loosening drive rod 11 rotates simultaneously, in conjunction with... Figure 7 Its upper end moves away from the loosening part 22. The spring force will drive the movable thread plate 19 to move closer to the clamping block 18, thereby clamping and fixing the thread between the clamping plate 20 and the clamping block 18. As the loosening drive rod 11 continues to rotate, it will drive the thread in the thread hole 27 to move forward, thereby realizing the loosening action.

[0034] Combination Figure 6 and Figure 7 The wire guide plates 14 are respectively arranged on both sides of the through groove 16. The wire guide plates 14 are provided with strip-shaped adjustment holes 23 for fasteners to pass through, thereby adjusting the installation position of the wire guide plates 14, which is convenient for adjustment and installation.

[0035] The upper end of the wire loosening drive rod 11 is formed with a protrusion 24 for pushing the wire loosening part 22, and the side of the wire loosening part 22 is formed with a protrusion 25 to facilitate pushing the wire loosening part 22.

[0036] A rotating shaft 26 is installed in the middle of the thread clamping block 18. The thread clamping block 18 is rotatably mounted on the thread guide plate 14 so that the end face of the thread clamping plate 20 can fit against the end face of the thread clamping block 18, thereby fixing the sewing thread.

[0037] The wire-cutting fork 5 includes a wire-cutting part 27 and a reset part 28, which are detailed below. Figure 4 When cam 3 rotates at a first angle in a preset direction, cam 3 pushes the wire-cutting part 27 of the wire-cutting fork 5 to perform the wire-cutting action through the wire-cutting linkage assembly 6; see details Figure 5 When the cam 3 continues to rotate in the preset direction to the second angle, the cam 3 pushes the reset part 28 of the wire cutting fork 5 to force the wire cutting linkage assembly 6 to reset; then the cam 3 continues to rotate, which will push the lifting lever 7 to perform the lifting action of the pressure foot assembly 9.

[0038] See details Figure 3 The lifting lever 7 includes upper and lower lever 29 and upper and lower lever 30. One end of the upper and lower lever 29 is provided with a fixing hole, and one end of the upper and lower lever 30 is provided with a strip-shaped adjustment hole 31. During installation, the position of the upper and lower lever 30 can be adjusted to adjust the height of the lifting foot. A connecting shaft 32 is installed between the upper and lower lever 29 and the upper and lower lever 30.

[0039] See details Figure 1 The machine body 1 is equipped with two stepper motors 33. The output shafts of the two stepper motors 33 are respectively equipped with swing arms 34. The other end of the swing arms 34 is connected to a feeding slide plate 35. The machine tool defines the X and Y direction components of the swing button by controlling the combination of the eccentric cranks of the two stepper motors 33.

[0040] See details Figure 1 The rear end of the machine body 1 is equipped with a servo spindle motor 36, the output shaft of which is connected to the sewing machine spindle 37. The synchronous belt transmission mechanism 39 includes a drive wheel 40 installed on the outer periphery of the sewing machine spindle 37 and a driven wheel 41 installed on the outer periphery of the sewing machine lower shaft 38. A transmission belt 42 is connected between the driven wheel 41 and the drive wheel 40. The transmission belt 42 can drive the sewing machine lower shaft 38 to rotate at high speed, thereby solving the problem that the button attaching machine uses an eccentric linkage method, which results in a low upper limit of the needle movement speed. It also has the advantages of shock absorption and noise reduction. The machine body 1 is equipped with an oil pump assembly 47, which is connected to several oil delivery pipes to deliver oil to various parts inside the sewing machine to achieve a lubrication effect.

[0041] Combination Figure 8 and Figure 9The machine base is equipped with an automatic oil supply device, which includes an oil tank 47, an oil pump 48, and a lower diversion valve 49. The machine body 1 is equipped with an upper diversion valve 50. The oil tank 47 is connected to an oil suction pipe 51. The other end of the oil suction pipe 51 is connected to a three-way valve 52. The outlet of the three-way valve 52 is connected to an oil suction pipe 53. The other end of the oil suction pipe 53 is connected to the oil pump 48. The output end of the oil pump 48 is connected to an oil outlet pipe 54. The oil outlet pipe 54 is connected to the upper end of the upper diversion valve 50. The lower end of the upper diversion valve 50 is connected to an oil-leading cotton 55 and an oil outlet pipe 56. The other end of 55 extends into the head of the machine to supply oil to the needle bar assembly 45. The lower end of the head of the machine is connected to a return oil pipe 57. The other end of the return oil pipe 57 is connected to a three-way valve 52. The other end of the outlet oil pipe 56 is connected to the upper end of the lower diversion valve 49. The lower end of the lower diversion valve 49 is connected to an oil-leading cotton 58 and an oil return pipe 59. The other end of the oil-leading cotton 58 extends into the front end of the machine base to supply oil to the hook line assembly 46. The other end of the return oil pipe 59 is connected to the oil tank 47. The lower end of the machine body 1 is connected to an oil return pipe 60. The other end of the oil return pipe 60 is connected to the oil tank 47.

[0042] When the oil pump is working, it can draw oil from the oil tank through the oil pipe and first deliver it to the diverter valve, and then deliver it to various parts to achieve the lubrication effect. It can effectively prevent the injection of too much oil and ensure that the oil supply is not too fast. The upper diverter valve is located at the head of the machine, which is relatively high. It can automatically divert the oil to other parts of the sewing machine by gravity, so that the oil supply is kept uniform and the oil supply speed is kept slow.

[0043] This invention, through the design of an oil pump, allows oil to be drawn from the oil tank via suction pipes two and one during actual operation. Then, the oil is first delivered to the diverter valve via oil outlet pipes three and four. Finally, a small amount of oil is continuously guided to the working parts through oil-lubricating cotton, thereby achieving continuous lubrication. Compared with manual lubrication in the prior art, this invention can achieve automated lubrication, which is convenient to operate, ensures that the machine can run for a long time, and extends its service life.

[0044] See details Figure 1 The needle bar assembly 45 includes a needle bar crank 61 disposed at the end of the sewing machine main shaft 37. The eccentric part of the needle bar crank 61 is connected to a needle bar connecting rod 62. A needle bar clamping block 63 is disposed at the end of the needle bar connecting rod 62. The needle bar clamping block 63 is fixed on the outer periphery of the needle bar 64, thereby driving the needle bar 64 to move up and down reciprocally to improve stability.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A button-attaching machine, characterized in that, include The base and the body (1) are equipped with a stepper motor (2) on the side of the body (1) and a cam (3) is installed on the output shaft of the stepper motor (2). A servo spindle motor (36) is installed at the rear end of the machine body (1). The output shaft of the servo spindle motor (36) is coaxially connected to the sewing machine spindle (37). The other end of the sewing machine spindle (37) is connected to the needle bar assembly (45). A synchronous belt drive mechanism (39) is installed between the sewing machine spindle (37) and the sewing machine lower shaft (38). The other end of the lower shaft (38) of the sewing machine is connected to a hook assembly (46); The upper end of the wire cutting drive rod (4) is formed with a wire cutting fork (5) for the cam (3) to push, and the lower end of the wire cutting drive rod (4) is connected to a wire cutting linkage assembly (6). The lifting lever (7) is rotatably disposed in the machine body (1) at its middle end. One end of the lifting lever (7) is formed with a pushing part (8) for the cam (3) to push. The other end of the lifting lever (7) is connected to a lifting foot assembly (9). The wire cutting fork (5) includes a wire cutting part (27) and a reset part (28); When the cam (3) rotates at a first angle in a preset direction, the cam (3) pushes the wire cutting part (27) of the wire cutting fork (5) to perform the wire cutting action through the wire cutting linkage assembly (6); When the cam (3) rotates a second angle in a preset direction, the cam (3) pushes the reset part (28) of the wire cutting fork (5) to force the wire cutting linkage assembly (6) to reset; the cam (3) pushes the lifting lever (7) to perform the lifting action of the pressure foot assembly (9); The lifting lever (7) has a loosening part (10) formed on it. The lower end of the loosening drive rod (11) has a loosening fork (12) for the loosening part (10) to push. The upper end of the loosening drive rod (11) is connected to a loosening assembly (13). When the cam (3) rotates a second angle along a preset direction, the lifting lever (7) pushes the loosening drive rod (11) to perform the loosening action through the loosening assembly (13).

2. The button-attaching machine according to claim 1, characterized in that: The lifting lever (7) includes upper and lower lever one (29) and upper and lower lever two (30). One end of the upper and lower lever one (29) is provided with a fixing hole, and one end of the upper and lower lever two (30) is provided with a strip-shaped adjustment hole two (31). A connecting shaft (32) is installed between the upper and lower lever one (29) and the upper and lower lever two (30).

3. The button-attaching machine according to claim 1, characterized in that: The machine body (1) is equipped with two stepper motors (33), and the output shafts of the two stepper motors (33) are respectively equipped with swing arms (34), and the other end of the swing arms (34) is connected to a feeding slide plate (35).

4. The button-attaching machine according to claim 1, characterized in that: The synchronous belt drive mechanism (39) includes a drive wheel (40) installed on the outer periphery of the sewing machine main shaft (37) and a driven wheel (41) installed on the outer periphery of the sewing machine lower shaft (38). A drive belt (42) is connected between the driven wheel (41) and the drive wheel (40).

5. The button-attaching machine according to claim 1, characterized in that: The base is equipped with an oil tank (47), an oil pump (48), and a lower diverter valve (49). The body (1) is equipped with an upper diverter valve (50). The oil tank (47) is connected to an oil suction pipe (51). The other end of the oil suction pipe (51) is connected to a three-way valve (52). The outlet of the three-way valve (52) is connected to an oil suction pipe (53). The other end of the oil suction pipe (53) is connected to the oil pump (48). The output end of the oil pump (48) is connected to an oil outlet pipe (54). The oil outlet pipe (54) is connected to the upper end of the upper diverter valve (50). The lower end of the upper diverter valve (50) is connected to an oil-leading cotton (55) and an oil outlet pipe (56). The other end of the oil-leading cotton (55) is connected to the oil outlet pipe (56). One end extends into the head of the machine to supply oil to the needle rod assembly (45). The lower end of the head is connected to the return oil pipe one (57). The other end of the return oil pipe one (57) is connected to the three-way valve (52). The other end of the outlet oil pipe four (56) is connected to the upper end of the lower diversion valve (49). The lower end of the lower diversion valve (49) is connected to the oil-leading cotton two (58) and the return oil pipe two (59). The other end of the oil-leading cotton two (58) extends into the front end of the machine base to supply oil to the hook line assembly (46). The other end of the return oil pipe two (59) is connected to the oil tank (47). The lower end of the machine body (1) is connected to the return oil pipe four (60). The other end of the return oil pipe four (60) is connected to the oil tank (47).

6. The button-attaching machine according to claim 1, characterized in that: The needle bar assembly (45) includes a needle bar crank (61) located at the end of the sewing machine spindle (37). The eccentric part of the needle bar crank (61) is connected to a needle bar connecting rod (62). A needle bar clamp (63) is provided at the end of the needle bar connecting rod (62). The needle bar clamp (63) is fixed on the outer periphery of the needle bar (64) to drive the needle bar (64) to move up and down reciprocally.

7. The button-attaching machine according to claim 1, characterized in that: The loosening assembly (13) includes a wire guide plate (14), a wire guide hole (15) is provided in the wire guide plate (14), a through groove (16) is provided on the body (1) for the upper end of the loosening drive rod (11) to extend out, a wire guide hole (17) is provided on the upper end of the loosening drive rod (11), a wire clamping block (18) and a movable wire plate (19) are respectively provided on the wire guide plate (14), a wire clamping plate (20) is formed on the movable wire plate (19), a wire guide space (21) is formed between the wire clamping plate (20) and the wire clamping block (18), one end of the movable wire plate (19) is rotatably connected to the body (1), a spring is connected between the movable wire plate (19) and the body (1) to drive the wire clamping plate (20) to move towards the side close to the wire clamping block (18), and a loosening part (22) is formed on one end of the movable wire plate (19) for the upper end of the loosening drive rod (11) to push.

8. The button-attaching machine according to claim 7, characterized in that: The wire guide plate (14) is respectively disposed on both sides of the through groove (16). The wire guide plate (14) is provided with a strip-shaped adjustment hole (23) for fasteners to pass through. The upper end of the wire loosening drive rod (11) is formed with a protrusion (24) for pushing the wire loosening part (22). The side of the wire loosening part (22) is formed with a protrusion (25). The middle part of the wire clamping block (18) is equipped with a rotating shaft (26). The wire clamping block (18) is rotatably disposed on the wire guide plate (14).

Images