Double-needle thread trimming mechanism of rotary pattern sewing machine

Abstract

The utility model discloses a double-needle thread trimming mechanism of a rotary pattern sewing machine, which comprises a first bottom shuttle mounting seat, a second bottom shuttle mounting seat and a thread trimming motor which are mounted on a rotary seat, the first bottom shuttle mounting seat is provided with a first thread trimming fixed knife and a first thread trimming movable knife, and the second bottom shuttle mounting seat is provided with a second thread trimming fixed knife and a second thread trimming movable knife; the thread trimming motor is connected with a thread trimming driving connecting rod capable of reciprocating through a gear transmission structure; the first bottom shuttle mounting seat is provided with a first thread trimming shaft for driving the first thread trimming movable cutter, the lower end of the first thread trimming shaft is connected with a first driving handle, the second bottom shuttle mounting seat is provided with a second thread trimming shaft for driving the second thread trimming movable cutter, and the lower end of the second thread trimming shaft is connected with a second driving handle; the thread trimming driving connecting rod is movably connected with the first driving handle, and the first driving handle is movably connected with the second driving handle through the first connecting rod.

Description

Technical Field

[0001] The utility model relates to a pattern sewing machine with a rotary machine head, in particular to a double-needle thread trimming mechanism of a rotary pattern sewing machine. Background Art

[0002] The utility model patent with the patent number of 201921253967.5 discloses a rotary installation structure of a rotary template sewing machine, including a rotary gear seat, a rotatable annular outer gear and an annular bearing for guiding the rotation of the annular outer gear are arranged inside the rotary gear seat, and a rotary control motor for driving the annular outer gear to rotate is arranged at the bottom of the rotary gear seat; a bottom shuttle mounting seat linked to the annular outer gear is arranged on the rotary gear seat, and a bobbin case and a bottom shuttle driving motor for driving the bobbin case to work are arranged on the bottom shuttle mounting seat. The rotary installation structure of the rotary template sewing machine is only suitable for single needle bar sewing, and the sewing efficiency is low. Summary of the invention

[0003] In view of the above-mentioned existing technical status, the utility model provides a double-needle thread trimming mechanism of a rotary pattern sewing machine, which controls the thread trimming work of two bottom shuttles through a thread trimming motor to improve sewing efficiency.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a double-needle thread trimming mechanism of a rotary pattern machine, comprising a first bottom shuttle mounting seat, a second bottom shuttle mounting seat and a thread trimming motor installed on a rotating seat, the first bottom shuttle mounting seat being provided with a first thread trimming fixed knife and a first thread trimming movable knife, the second bottom shuttle mounting seat being provided with a second thread trimming fixed knife and a second thread trimming movable knife; the thread trimming motor is connected to a thread trimming driving connecting rod capable of reciprocating movement through a gear transmission structure; the first bottom shuttle mounting seat is provided with a first thread trimming shaft for driving the first thread trimming movable knife, the lower end of the first thread trimming shaft is connected to a first driving handle, the second bottom shuttle mounting seat is provided with a second thread trimming shaft for driving the second thread trimming movable knife, the lower end of the second thread trimming shaft is connected to the second driving handle; the thread trimming driving connecting rod is movably connected to the first driving handle, and the first driving handle is movably connected to the second driving handle through the first connecting rod.

[0005] In order to optimize the above technical solution, the utility model also includes the following improved technical solution.

[0006] The first bottom shuttle mounting seat is provided with a first slide groove, a first slider is provided in the first slide groove, and the first thread trimming movable knife is fixedly connected to the first slider; the upper end of the first thread trimming shaft is provided with a third driving handle movably connected to the first slider.

[0007] The second bottom shuttle mounting seat is provided with a second slide groove, a second slider is provided in the second slide groove, and the second thread trimming movable knife is fixedly connected to the second slider; the upper end of the second thread trimming shaft is provided with a fourth driving handle movably connected to the second slider.

[0008] The gear transmission structure comprises a driving gear connected to the thread trimmer motor and a passive gear matched with the driving gear; the passive gear is rotatably mounted on the mounting frame of the rotating seat, and the wheel body of the passive gear is movably connected to one end of the thread trimmer driving connecting rod.

[0009] The first thread trimmer shaft is vertically rotatably mounted on the first bottom shuttle mounting seat, and the first driving handle has a sleeve portion fixedly connected to the first thread trimmer shaft, the sleeve portion is connected to a first handle portion connected to the thread trimmer driving connecting rod, and a second handle portion connected to the first connecting rod.

[0010] Compared with the prior art, the double-needle thread trimming mechanism of the utility model has a thread trimming motor connected to a thread trimming drive connecting rod capable of reciprocating motion through a gear transmission structure, the thread trimming drive connecting rod is movably connected to the first drive handle, and the first drive handle is movably connected to the second drive handle through the first connecting rod. The thread trimming action of the first thread trimming movable knife and the second thread trimming movable knife can be controlled simultaneously, thereby improving sewing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0012] Figure 2 yes Figure 1 Assembly breakdown diagram of .

[0013] Figure 3 yes Figure 1 Schematic diagram of the structure of the first bottom shuttle mounting seat part.

[0014] Figure 4 yes Figure 1 A schematic diagram of the cross-sectional structure of the first bottom shuttle mounting seat.

[0015] Figure 5 It is a three-dimensional structural schematic diagram of the needle plate mounting frame.

[0016] Figure 6 yes Figure 5 Assembly breakdown diagram of . Implementation

[0017] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings.

[0018] Figures 1 to 6 Shown is a schematic structural diagram of the utility model.

[0019] The accompanying drawings are marked as follows: rotating seat 1, first bottom shuttle mounting seat 2, first line dividing rod 21, first line dividing driving plate 22, first line dividing driving handle 23, first thread trimming fixed knife 24, first slide groove 25, first slider 26, second bottom shuttle mounting seat 3, second line dividing rod 31, second thread trimming fixed knife 32, first vertical bottom shuttle 4, first vertical shaft 41, first gear 42, first eccentric shaft section 43, first bearing 44, second vertical bottom shuttle 5, bottom shuttle driving shaft 6, third gear 61 , driving motor 63, first synchronous wheel 64, second synchronous wheel 65, first synchronous belt 66, thread trimming motor 7, first thread trimming movable knife 71, thread trimming driving connecting rod 72, first thread trimming shaft 73, first driving handle 74, first handle part 74a, first connecting rod 75, first connecting rod 75, second driving handle 76, third driving handle 77, passive gear 78, needle plate mounting frame 8, pinhole plate 81, bottom line detection mounting plate 82, photoelectric sensor 83, indicator light 84, observation hole 85.

[0020] The double bottom shuttle driving mechanism of the rotary pattern machine of the utility model comprises a rotatable rotating seat 1, on which a first bottom shuttle mounting seat 2 and a second bottom shuttle mounting seat 3 are installed. A rotatable first vertical bottom shuttle 4 is arranged in the first bottom shuttle mounting seat 2, and the first vertical bottom shuttle 4 is connected to the upper end of a first vertical shaft 41, and a first gear 42 is installed in the first vertical shaft 41. A rotatable second vertical bottom shuttle 5 is arranged in the second bottom shuttle mounting seat 3, and the second vertical bottom shuttle 5 is connected to the upper end of the second vertical shaft, and a second gear is installed in the second vertical shaft. A bottom shuttle driving shaft 6 passes through the first bottom shuttle mounting seat 2 and the second bottom shuttle mounting seat 3, and the bottom shuttle driving shaft 6 is installed with a third gear 61 matched with the first gear 42 and a fourth gear matched with the second gear. The rotating seat 1 is provided with a driving motor 63 for driving the bottom shuttle driving shaft 6 to rotate, and the driving motor 63 can drive the first vertical bottom shuttle 4 and the second vertical bottom shuttle 5 to rotate synchronously through the bottom shuttle driving shaft 6.

[0021] The power output shaft of the driving motor 63 is connected to a first synchronous wheel 64 , the end of the bottom shuttle driving shaft 6 is connected to a second synchronous wheel 65 , and the first synchronous wheel 64 is connected to the second synchronous wheel 65 through a first synchronous belt 66 .

[0022] A first line dividing rod 21 is provided on one side of the first vertical bottom shuttle 4. The first line dividing rod 21 is connected to one end of the first line dividing driving plate 22. The other end of the first line dividing driving plate 22 is rotatably mounted on the first bottom shuttle mounting seat 2. The middle part of the first line dividing driving plate 22 is rotatably connected to one end of the first line dividing driving handle 23. The other end of the first line dividing driving handle 23 is rotatably matched with the first eccentric shaft section 43 on the first vertical shaft 41. During the rotation of the first vertical bottom shuttle 4 and the first vertical shaft 41, since the axis of the first eccentric shaft section 43 does not coincide with the axis of the first vertical shaft 41, the first line dividing driving handle 23 sleeved on the first eccentric shaft section 43 will swing with the rotation of the first vertical shaft 41, and the first line dividing driving handle 23 drives the first line dividing driving plate 22 to reciprocate around its rotation axis, so that the first line dividing rod 21 follows the rotation speed of the first vertical shaft 41 to perform line dividing action.

[0023] A second wire dividing rod 31 is provided on one side of the second vertical bottom shuttle 5, and the working principle of the second wire dividing rod 31 is the same as that of the first wire dividing rod 21. The second wire dividing rod 31 is connected to one end of the second wire dividing driving plate, and the other end of the second wire dividing driving plate is rotatably mounted on the first bottom shuttle mounting seat 2, and the middle part of the second wire dividing driving plate is rotatably connected to one end of the second wire dividing driving handle, and the other end of the second wire dividing driving handle is rotatably matched with the second eccentric shaft section on the second vertical axis.

[0024] The first vertical shaft 41 is installed in the first vertical hole of the first bottom shuttle mounting seat 2 through the first bearing 44. The first gear 42 is located below the first bearing 44, and the first eccentric shaft section 43 is located above the first bearing 44. The second vertical shaft is installed in the second vertical hole of the second bottom shuttle mounting seat 3 through the second bearing. The second gear is located below the second bearing, and the second eccentric shaft section is located above the second bearing.

[0025] The double-needle thread trimming mechanism of the rotary pattern machine includes a first bottom shuttle mounting seat 2, a second bottom shuttle mounting seat 3 and a thread trimming motor 7 mounted on a rotating seat 1. The first bottom shuttle mounting seat 2 is provided with a first thread trimming fixed knife 24 and a first thread trimming movable knife 71, and the second bottom shuttle mounting seat 3 is provided with a second thread trimming fixed knife 32 and a second thread trimming movable knife. The thread trimming motor 7 is connected to a thread trimming driving connecting rod 72 capable of reciprocating motion through a gear transmission structure. The first bottom shuttle mounting seat 2 is provided with a first thread trimming shaft 73 for driving the first thread trimming movable knife 71, and the lower end of the first thread trimming shaft 73 is connected to a first driving handle 74, and the second bottom shuttle mounting seat 3 is provided with a second thread trimming shaft for driving the second thread trimming movable knife, and the lower end of the second thread trimming shaft is connected to a second driving handle 76. The thread trimming driving connecting rod 72 is movably connected to the first driving handle 74, and the first driving handle 74 is movably connected to the second driving handle 76 through a first connecting rod 75.

[0026] The first bottom shuttle mounting seat 2 is provided with a first slide groove 25, a first slider 26 is provided in the first slide groove 25, and the first thread trimming movable knife 71 is fixedly connected to the first slider 26. The upper end of the first thread trimming shaft 73 is provided with a third driving handle 77 movably connected to the first slider 26. The first slider 26 is provided with a long groove, and a connecting pin is formed at the end of the third driving handle 77, which is movably installed in the long groove. The third driving handle 77 rotates around the first thread trimming shaft 73, and can drive the first slider 26 to slide along the first slide groove 25, thereby controlling the movement of the first thread trimming movable knife 71.

[0027] The movement principle of the second thread trimming movable knife is the same as that of the first thread trimming movable knife 71. The second bottom shuttle mounting seat 3 is provided with a second slide groove, in which a second slider is provided, and the second thread trimming movable knife is fixedly connected to the second slider. The upper end of the second thread trimming shaft is provided with a fourth driving handle movably connected to the second slider.

[0028] The gear transmission structure includes a driving gear connected to the thread trimming motor 7 and a passive gear 78 matched with the driving gear. The passive gear 78 is rotatably mounted on the mounting frame of the rotating seat 1, and the wheel body of the passive gear 78 is movably connected to one end of the thread trimming driving connecting rod 72.

[0029] The first thread trimming shaft 73 is vertically rotatably mounted on the first bottom shuttle mounting seat 2, and the first driving handle 74 has a sleeve portion fixedly connected to the first thread trimming shaft 73, the sleeve portion is connected to a first handle portion 74a connected to the thread trimming driving connecting rod 72, and a second handle portion 74b connected to the first connecting rod 75.

[0030] The double bottom line detection mechanism of the rotary pattern machine includes a needle plate mounting frame 8 fixed on the top of the rotating seat 1, and a first bottom shuttle mounting frame 2 and a second bottom shuttle mounting frame 3 are fixed between the rotating seat 1 and the needle plate mounting frame 8. A rotatable first vertical bottom shuttle 4 is arranged in the first bottom shuttle mounting frame 2, and a rotatable second vertical bottom shuttle 5 is arranged in the second bottom shuttle mounting frame 3. The second vertical bottom shuttle 5 is connected to the upper end of the second vertical shaft, and the second vertical shaft is installed with a second gear. A pinhole plate 81 is fixed to the needle plate mounting frame 8, and bottom line detection mounting plates 82 are respectively arranged on both sides of the pinhole plate 81. A photoelectric sensor 83 for detecting the rotation of the bobbin is installed on the bottom surface of the bottom line detection mounting plate 82.

[0031] The lower thread detection mounting plate 82 is provided with an observation hole 85, and the photoelectric sensor 83 is provided with an indicator light 84 located below the observation hole 85. The bobbin is divided into two colors on the side facing the photoelectric sensor 83, and the two colors have different light reflectances. The light emitted by the photoelectric sensor 83 to the bobbin has different feedback signals as the bobbin rotates, so the number of turns of the bobbin can be counted, thereby calculating the amount of lower thread used, achieving the function of detecting the amount of lower thread used.

[0032] The best embodiment of the present invention has been described, and various changes or modifications made by ordinary technicians in this field will not depart from the scope of the present invention.

Claims

1. A double-needle thread trimming mechanism of a rotary pattern machine, comprising a first bottom shuttle mounting seat (2), a second bottom shuttle mounting seat (3) and a thread trimming motor (7) mounted on a rotating seat (1), Its characteristics are: The first bottom shuttle mounting seat (2) is provided with a first fixed thread trimming knife (24) and a first movable thread trimming knife (71), and the second bottom shuttle mounting seat (3) is provided with a second fixed thread trimming knife (32) and a second movable thread trimming knife; the thread trimming motor (7) is connected to a thread trimming driving connecting rod (72) capable of reciprocating movement through a gear transmission structure; the first bottom shuttle mounting seat (2) is provided with a first thread trimming shaft (73) for driving the first movable thread trimming knife (71), the lower end of the first thread trimming shaft (73) is connected to a first driving handle (74), and the second bottom shuttle mounting seat (3) is provided with a second thread trimming shaft for driving the second movable thread trimming knife, the lower end of the second thread trimming shaft is connected to a second driving handle (76); the thread trimming driving connecting rod (72) is movably connected to the first driving handle (74), and the first driving handle (74) is movably connected to the second driving handle (76) through a first connecting rod (75).

2. The double-needle thread trimming mechanism according to claim 1, Its characteristics are: The first bottom shuttle mounting seat (2) is provided with a first slide groove (25), a first slider (26) is provided in the first slide groove (25), the first thread cutting movable knife (71) is fixedly connected to the first slider (26); the upper end of the first thread cutting shaft (73) is provided with a third driving handle (77) movably connected to the first slider (26).

3. The double-needle thread trimming mechanism according to claim 2, Its characteristics are: The second bottom shuttle mounting seat (3) is provided with a second slide groove, a second slide block is provided in the second slide groove, and the second thread trimming movable knife is fixedly connected to the second slide block; the upper end of the second thread trimming shaft is provided with a fourth driving handle movably connected to the second slide block.

4. The double-needle thread trimming mechanism according to claim 3, Its characteristics are: The gear transmission structure comprises a driving gear connected to the thread trimming motor (7) and a passive gear (78) matched with the driving gear; the passive gear (78) is rotatably mounted on a mounting frame of the rotating seat (1), and the wheel body of the passive gear (78) is movably connected to one end of the thread trimming driving connecting rod (72).

5. The double-needle thread trimming mechanism according to claim 1, Its characteristics are: The first thread trimming shaft (73) is vertically rotatably mounted on the first bottom shuttle mounting seat (2), and the first driving handle (74) has a shaft sleeve portion fixedly connected to the first thread trimming shaft (73), and the shaft sleeve portion is connected to a first handle portion (74a) connected to the thread trimming driving connecting rod (72), and a second handle portion (74b) connected to the first connecting rod (75).

Images