CN109972310B - Thread trimming device of pattern sewing machine - Google Patents
Thread trimming device of pattern sewing machine Download PDFInfo
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- CN109972310B CN109972310B CN201711463707.6A CN201711463707A CN109972310B CN 109972310 B CN109972310 B CN 109972310B CN 201711463707 A CN201711463707 A CN 201711463707A CN 109972310 B CN109972310 B CN 109972310B
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- thread
- thread trimming
- trimming
- lever
- cutting
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms
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- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a thread trimming device of a pattern sewing machine, and belongs to the technical field of pattern sewing machines. The thread trimming device of the pattern sewing machine solves the problem that the structure of the original pattern sewing machine is unstable. The thread trimming device of the pattern sewing machine comprises a presser foot lifting driving assembly, a thread trimming cam and a thread trimming roller, wherein the thread trimming roller is in clutch connection with the thread trimming cam, the thread trimming roller is connected with the thread trimming assembly and drives the thread trimming assembly to move, and a connecting assembly for driving the thread trimming roller to be in clutch connection with the thread trimming cam is arranged between the presser foot driving assembly and the thread trimming roller.
Description
Technical Field
The invention belongs to the technical field of pattern sewing machines, and relates to a thread trimming device of a pattern sewing machine.
Background
The technical scheme includes that the thread cutting device of the existing sewing machine is disclosed as Chinese patent with the publication number of CN102877230A and the name of the thread cutting device is an automatic thread cutting device of the sewing machine, the automatic thread cutting device comprises a movable knife, a fixed knife, a connecting rod and a thread cutting electromagnet, the movable knife, the fixed knife, the connecting rod and the thread cutting electromagnet can be matched with each other to cut threads, the fixed knife is fixed on a base of the sewing machine, one end of the movable knife and one end of the connecting rod are fixed on a thread cutting knife rest, the thread cutting knife rest is sleeved on a lower shaft, the other end of the connecting rod is hinged with one end of a transmission rod, the other end of the transmission rod is connected with a movable iron of the thread cutting electromagnet, a thread cutting cam is installed on a. However, this solution still has some problems: 1. the electromagnet is driven, so that the stability is poor; 2. the presser foot lifting motor is not fully utilized, and only the presser foot lifting action is carried out; 3. the trimming electromagnet needs an independent power line, and the assembly process is multiple; 4. the travel of the electromagnet is not easy to control, and the safety is poor.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a stable-structure thread trimming device of a pattern sewing machine.
The purpose of the invention can be realized by the following technical scheme:
the thread trimming device of the pattern sewing machine comprises a presser foot lifting driving assembly, a thread trimming cam and a thread trimming roller, wherein the thread trimming roller is in clutch connection with the thread trimming cam and is connected with the thread trimming assembly and drives the thread trimming assembly to act.
In the thread trimming device of the pattern sewing machine, the presser foot lifting driving assembly is in transmission connection with the thread trimming assembly, so that the presser foot lifting driving assembly can be used for not only lifting the presser foot, but also helping to realize thread trimming. Compared with the prior art, the device avoids the problem of unstable structure caused by the fact that the original structure drives the thread cutting action through the electromagnet. And moreover, the utilization efficiency of a power source in the presser foot lifting driving assembly is higher, so that the device has a more compact structure.
When the pressure foot lifting mechanism is used, when the pressure foot is required to be lifted, the pressure foot lifting driving assembly acts to complete the pressure foot lifting action. When the thread is required to be cut, the presser foot lifting driving assembly acts, the thread cutting roller is driven to be matched with the thread cutting cam through the connecting assembly, and the thread cutting assembly finishes the thread cutting action under the driving of the thread cutting cam.
In the thread trimming device of the pattern sewing machine, the presser foot lifting driving assembly comprises a stepping motor, a presser foot cam in driving connection with the stepping motor, a presser foot connecting rod connected with the presser foot cam, and a driving lever, wherein one end of the driving lever is connected with the presser foot connecting rod, and the other end of the driving lever is connected with the connecting assembly.
When the presser foot is lifted or the thread is cut, the stepping motor rotates to drive the presser foot cam to rotate, and the presser foot connecting rod drives the driving lever to act. When the trimming is carried out, the power is transmitted to the trimming roller through the connecting component, and the matching of the trimming roller and the trimming cam is realized.
In the thread trimming device of the pattern sewing machine, the thread trimming device further comprises a guide shaft, a leaning piece is arranged on the guide shaft, the thread trimming roller is arranged on the leaning piece, the connecting assembly comprises a thread trimming push rod and a driving press rod connected with the thread trimming push rod, the thread trimming push rod is connected with the driving lever, and the pressing foot lifting driving assembly drives the driving press rod to push the leaning piece to move through the thread trimming push rod.
The guide shaft realizes that the leaning piece can translate along the axis direction of the guide shaft, so that the thread trimming roller smoothly and the thread trimming cam can be in clutch action.
In the thread trimming device of the pattern sewing machine, the thread trimming assembly comprises a first thread trimming rod and a second thread trimming rod, and the thread trimming roller is connected with the first thread trimming rod; first trimming pole and second trimming pole between be equipped with first trimming lever and second trimming lever, the trimming subassembly still include trimming lever axle, first trimming lever and second trimming lever cover establish at trimming lever epaxial, first trimming pole and first trimming lever link to each other, second trimming pole and second trimming lever link to each other, first trimming lever and second trimming lever between use trimming lever axle as the adjustable fixed of pivot.
The first trimming lever and the second trimming lever are adjustably fixed by taking the trimming lever shaft as a rotating shaft, so that on one hand, the first trimming lever and the second trimming lever can rotate by taking the trimming lever shaft as a center as a whole; on the other hand, in order to adjust the position of the movable knife so as to cut the thread smoothly, the relative angle between the first thread cutting lever and the second thread cutting lever can be adjusted.
In the thread trimming device of the pattern sewing machine, the first thread trimming lever and the second thread trimming lever are provided with bolt assemblies in a penetrating mode, the first thread trimming lever and/or the second thread trimming lever are/is provided with strip-shaped holes, and the bolt assemblies are arranged in the strip-shaped holes in a penetrating mode.
When the relative angle between the first trimming lever and the second trimming lever needs to be adjusted, the bolt assembly is loosened, the position of the bolt assembly in the strip-shaped hole is adjusted, then the bolt assembly is fastened, the adjustment is completed, so that the adjustment of the trimming device can be more convenient, and the position of the knife can be moved, and the trimming can be smoothly carried out.
In the thread trimming device of the pattern sewing machine, the first thread trimming lever and/or the second thread trimming lever is/are provided with a through hole, and the first thread trimming lever is also provided with a reset spring mounting hole for mounting a reset spring.
When the relative angle between the first trimming lever and the second trimming lever needs to be adjusted, the bolt assembly is arranged in the through hole and the strip-shaped hole in a penetrating mode, the installation position of the bolt assembly on the strip-shaped hole is changed, namely, the relative position of the through hole and the strip-shaped hole is changed, and therefore the adjustment of the relative angle between the first trimming lever and the second trimming lever is completed.
In the thread trimming device of the pattern sewing machine, the thread trimming push rod is connected with the presser foot lifting driving assembly through a ball head, and the thread trimming push rod is connected with the driving press rod through the ball head.
The two ends of the trimming push rod are arranged to be ball head structures, so that the trimming push rod is convenient to mount and adjust, flexible to move and higher in structural stability.
Compared with the prior art, the thread trimming device of the pattern sewing machine has the following advantages:
1. the presser foot lifting and the thread cutting of the pattern sewing machine are realized by the same power source, so that the pattern sewing machine is energy-saving and efficient;
2. the wire shearing of the electromagnet in the original wire shearing device is avoided, so that the structure of the wire shearing device is more stable;
3. the relative angle between the first thread trimming lever and the second thread trimming lever can be adjusted so as to adjust the position of the movable knife and ensure the smooth thread trimming of the pattern sewing machine.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of a thread trimming device of a pattern sewing machine;
FIG. 2 is a schematic view of the presser foot drive assembly from another perspective;
FIG. 3 is a schematic view of the structure at the thread trimming assembly;
FIG. 4 is a schematic view of the structure at another perspective of the thread trimming assembly;
FIG. 5 is a schematic view of the structure at the trimming cam;
in the figure, 1, a trimming cam; 2. trimming rollers; 31. a presser foot cam; 32. a presser foot connecting rod; 33. a drive lever; 34. a first link; 35. a second link; 41. a guide shaft; 42. an abutting member; 51. a thread cutting push rod; 52. a drive strut; 61. a first wire cutting rod; 62. a second wire cutting rod; 63. a first trimming lever; 64. a second trimming lever; 65. a trimming lever shaft; 66. a strip-shaped hole; 67. a through hole; 68. a return spring mounting hole; 7. and (6) moving the knife.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in figure 1, the thread trimming device of the pattern sewing machine comprises a presser foot lifting driving assembly and a thread trimming assembly.
Specifically, as shown in fig. 2, the presser foot lifting driving assembly includes a stepping motor (not shown), a presser foot cam 31 connected to the stepping motor in a driving manner, and a presser foot link 32 connected to the presser foot cam 31. In this embodiment, the presser foot link 32 includes a first link 34 and a second link 35 hinged to the first link 34, in fig. 2, the first link 34 swings around its middle as a rotation center, and a roller is provided at a lower end of the first link 34 to be connected to the presser foot cam 31. The presser foot lifting driving assembly further comprises a driving lever 33, in fig. 2, the driving lever 33 swings with the middle of itself as a rotation center, and the right end of the second connecting rod 35 is hinged with the presser foot connecting rod 32.
As shown in fig. 3 and 4, the thread trimmer assembly includes a first thread trimmer rod 61 and a second thread trimmer rod 62. As shown in fig. 5, the thread trimming roller 2 is connected to the first thread trimming rod 61 through the abutting member 42, and is constructed in a ball joint structure. A first trimming lever 63 and a second trimming lever 64 are arranged between the first trimming rod 61 and the second trimming rod 62, the trimming assembly further comprises a trimming lever shaft 65, the first trimming lever 63 and the second trimming lever 64 are sleeved on the trimming lever shaft 65, the first trimming rod 61 is connected with the first trimming lever 63, and the structure of the first trimming rod is a ball joint hinge structure; the second thread trimming rod 62 is connected with a second thread trimming lever 64, and the structure of the second thread trimming lever is a ball joint structure. The other end of the second thread trimming rod 62 is connected with the movable knife 7, and the structure of the second thread trimming rod is a ball joint hinge structure. The first trimming lever 63 and the second trimming lever 64 are adjustably fixed with respect to each other by using a trimming lever shaft 65 as a rotating shaft.
On the one hand, the fact that the first trimming lever 63 and the second trimming lever 64 are adjustably fixed by taking the trimming lever shaft 65 as a rotating shaft means that the first trimming lever 63 and the second trimming lever 64 can rotate as a whole by taking the trimming lever shaft 65 as a center; on the other hand, in order to adjust the position of the movable blade 7 for smooth trimming, the relative angle between the first trimming lever 63 and the second trimming lever 64 can be adjusted.
Specifically, bolt assemblies penetrate through the first trimming lever 63 and the second trimming lever 64, strip-shaped holes 66 are formed in the first trimming lever 63 and/or the second trimming lever 64, and the bolt assemblies penetrate through the strip-shaped holes 66. When the relative angle between the first trimming lever 63 and the second trimming lever 64 needs to be adjusted, the bolt assembly is loosened, the position of the bolt assembly in the strip-shaped hole 66 is adjusted, then the bolt assembly is fastened, the adjustment is completed, so that the position of the movable knife 7 can be adjusted more conveniently by the trimming device, and the trimming can be performed smoothly. In the present embodiment, a strip-shaped hole 66 is provided on the second trimming lever 64.
As a further optimized solution, a through hole 67 is provided on the first trimming lever 63 and/or the second trimming lever 64, and a return spring mounting hole 68 for mounting a return spring is further provided on the first trimming lever 63. When the relative angle between the first trimming lever 63 and the second trimming lever 64 needs to be adjusted, the bolt assembly is arranged in the through hole 67 and the strip-shaped hole 66 in a penetrating mode, the installation position of the bolt assembly on the strip-shaped hole 66 is changed, namely, the relative position of the through hole 67 and the strip-shaped hole 66 is changed, and therefore the adjustment of the relative angle between the first trimming lever 63 and the second trimming lever 64 is completed. In the present embodiment, the through hole 67 is opened in the first trimming lever 63. The return spring mounting hole 68 is provided with a return spring.
As shown in fig. 1 and 5, the thread trimming device of the pattern sewing machine further comprises a thread trimming cam 1 and a thread trimming roller 2 which is in clutch connection with the thread trimming cam 1. The inside of the trimming cam 1 is provided with a guide rail, and after the trimming roller 2 enters the guide rail in the trimming cam 1, the trimming cam 1 drives the trimming roller 2 to move.
The thread trimming roller 2 is connected with the thread trimming component and drives the thread trimming component to act. A connecting component for driving the thread trimming roller 2 and the thread trimming cam 1 to be separated and combined is arranged between the presser foot driving component and the thread trimming roller 2. The connecting assembly comprises a thread cutting push rod 51 and a driving pressure rod 52 connected with the thread cutting push rod 51. The thread cutting push rod 51 is hinged with the driving lever 33, and the lifting and pressing foot driving assembly drives the driving press rod 52 to push the abutting piece 42 through the thread cutting push rod 51. The thread trimming push rod 51 is connected with the presser foot lifting drive assembly through a ball head, and the thread trimming push rod 51 is connected with the drive pressing rod 52 through the ball head, so that the thread trimming push rod 51 is convenient to mount and adjust, flexible to move, and stronger in structural stability of the thread trimming push rod 51.
In fig. 1, the upper end of the driving lever 33 is hinged to the thread trimming push rod 51, and the right end of the thread trimming push rod 51 is hinged to the driving pressure rod 52. The driving pressure lever 52 swings around the middle part of itself, and during the process that the driving pressure lever 52 pushes the abutting piece 42, in fig. 5, the right end of the driving pressure lever 52 pushes the abutting piece 42 to move axially along the guide shaft 41.
As shown in fig. 5, the guide shaft 41 enables the abutting piece 42 to translate along the axial direction of the guide shaft 41, so that the trimming roller 2 can smoothly clutch with the trimming cam 1. The trimming roller 2 is disposed on the abutting piece 42. In the present embodiment, the thread trimming roller 2 is connected to the middle of the abutting member 42, in fig. 5, the left end of the abutting member 42 is sleeved on the guide shaft 41, and the right end of the abutting member 42 is connected to the first thread trimming lever 63.
In the thread trimming device of the pattern sewing machine, the presser foot lifting driving assembly is in transmission connection with the thread trimming assembly, so that the presser foot lifting driving assembly can be used for not only lifting the presser foot, but also helping to realize thread trimming. Compared with the prior art, the device avoids the problem of unstable structure caused by the fact that the original structure drives the thread cutting action through the electromagnet. And moreover, the utilization efficiency of a power source in the presser foot lifting driving assembly is higher, so that the device has a more compact structure.
When the presser foot lifting device is used, when the presser foot lifting or the thread trimming needs to be realized, the stepping motor rotates to drive the presser foot cam 31 to rotate, and the presser foot connecting rod 32 drives the driving lever 33 to act. When in thread cutting, the power pushes the abutting part 42 through the connecting component, the abutting part 42 drives the thread cutting roller 2 to the matching part with the thread cutting cam 1, and the thread cutting cam 1 rotates under the driving of the main shaft of the pattern sewing machine, so that the thread cutting action is realized through the thread cutting roller 2 and the thread cutting component. Like the internal structure of a common pattern sewing machine, when the action of lifting the presser foot or cutting the thread is finished, the components of the thread cutting device are restored to the initial position through the action of the arranged spring.
Claims (5)
1. The thread trimming device of the pattern sewing machine comprises a presser foot lifting driving assembly, a thread trimming cam (1) and a thread trimming roller (2) in clutch connection with the thread trimming cam (1), wherein the thread trimming roller (2) is connected with the thread trimming assembly and drives the thread trimming assembly to act, the thread trimming device is characterized in that a connecting assembly for driving the thread trimming roller (2) and the thread trimming cam (1) to be in clutch connection is arranged between the presser foot driving assembly and the thread trimming roller (2), the presser foot lifting driving assembly comprises a stepping motor, a presser foot cam (31) in driving connection with the stepping motor and a presser foot connecting rod (32) connected with the presser foot cam (31), the presser foot lifting driving assembly further comprises a driving lever (33), one end of the driving lever (33) is connected with the presser foot connecting rod (32), the other end of the driving lever (33) is connected with the connecting assembly, and the thread trimming device further comprises a guide shaft (41), the yarn cutting device is characterized in that a supporting part (42) is arranged on the guide shaft (41), the yarn cutting roller (2) is arranged on the supporting part (42), the connecting assembly comprises a yarn cutting push rod (51) and a driving press rod (52) connected with the yarn cutting push rod (51), the yarn cutting push rod (51) is connected with the driving lever (33), and the pressing foot lifting driving assembly drives the driving press rod (52) to push the supporting part (42) through the yarn cutting push rod (51).
2. A pattern sewing machine thread trimming device according to claim 1, characterized in that the thread trimming assembly comprises a first thread trimming rod (61) and a second thread trimming rod (62), and the thread trimming roller (2) is connected with the first thread trimming rod (61); first pole (61) and second pole (62) of cutting thread between be equipped with first pole (63) and second pole (64) of cutting thread, the line cutting subassembly still include pole (65) of cutting thread, first pole (63) of cutting thread and second pole (64) of cutting thread overlap and establish on pole (65) of cutting thread, first pole (61) of cutting thread and first pole (63) of cutting thread link to each other, second pole (62) of cutting thread and second pole (64) of cutting thread link to each other, first pole (63) of cutting thread and second pole (64) of cutting thread between use pole (65) of cutting thread to be adjustable fixed as the pivot.
3. The thread trimming device of a pattern sewing machine according to claim 2, characterized in that bolt assemblies are arranged on the first thread trimming lever (63) and the second thread trimming lever (64) in a penetrating manner, strip-shaped holes (66) are formed in the first thread trimming lever (63) and/or the second thread trimming lever (64), and the bolt assemblies are arranged in the strip-shaped holes (66) in a penetrating manner.
4. A pattern sewing machine thread trimming device according to claim 2, characterized in that the first thread trimming lever (63) and/or the second thread trimming lever (64) is provided with a through hole (67), and the first thread trimming lever (63) is further provided with a return spring mounting hole (68) for mounting a return spring.
5. A pattern sewing machine thread trimming device according to claim 1, characterized in that the thread trimming push rod (51) is connected with the presser foot lifting driving component through a ball head, and the thread trimming push rod (51) is connected with the driving pressure rod (52) through a ball head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711463707.6A CN109972310B (en) | 2017-12-28 | 2017-12-28 | Thread trimming device of pattern sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711463707.6A CN109972310B (en) | 2017-12-28 | 2017-12-28 | Thread trimming device of pattern sewing machine |
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| Publication Number | Publication Date |
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| CN109972310A CN109972310A (en) | 2019-07-05 |
| CN109972310B true CN109972310B (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711463707.6A Active CN109972310B (en) | 2017-12-28 | 2017-12-28 | Thread trimming device of pattern sewing machine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110424143B (en) * | 2019-07-23 | 2021-01-12 | 繁昌县融慧服装有限责任公司 | Thread trimmer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60188195A (en) * | 1984-03-09 | 1985-09-25 | アイシン精機株式会社 | Pattern cam selector of sewing machine |
| CN1757812A (en) * | 2004-10-08 | 2006-04-12 | 重机公司 | Sewing machine |
| CN104099726A (en) * | 2014-06-24 | 2014-10-15 | 台州拓卡奔马机电科技有限公司 | Driving mechanism for thread sewing and presser foot lifting thread-scissoring and buttonholing machine |
| CN204662030U (en) * | 2015-04-11 | 2015-09-23 | 强信机械科技(莱州)有限公司 | Sewing machines thread-trimming lifter-presser foot drive unit |
| CN105908400A (en) * | 2016-06-29 | 2016-08-31 | 拓卡奔马机电科技有限公司 | Sewing machine and function driving device of sewing machine |
-
2017
- 2017-12-28 CN CN201711463707.6A patent/CN109972310B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60188195A (en) * | 1984-03-09 | 1985-09-25 | アイシン精機株式会社 | Pattern cam selector of sewing machine |
| CN1757812A (en) * | 2004-10-08 | 2006-04-12 | 重机公司 | Sewing machine |
| CN104099726A (en) * | 2014-06-24 | 2014-10-15 | 台州拓卡奔马机电科技有限公司 | Driving mechanism for thread sewing and presser foot lifting thread-scissoring and buttonholing machine |
| CN204662030U (en) * | 2015-04-11 | 2015-09-23 | 强信机械科技(莱州)有限公司 | Sewing machines thread-trimming lifter-presser foot drive unit |
| CN105908400A (en) * | 2016-06-29 | 2016-08-31 | 拓卡奔马机电科技有限公司 | Sewing machine and function driving device of sewing machine |
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| CN109972310A (en) | 2019-07-05 |
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