CN214219042U - Thread cutting mechanism of sewing machine - Google Patents
Thread cutting mechanism of sewing machine Download PDFInfo
- Publication number
- CN214219042U CN214219042U CN202023102104.3U CN202023102104U CN214219042U CN 214219042 U CN214219042 U CN 214219042U CN 202023102104 U CN202023102104 U CN 202023102104U CN 214219042 U CN214219042 U CN 214219042U
- Authority
- CN
- China
- Prior art keywords
- shaft
- sewing machine
- worm
- movable knife
- thread trimming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The utility model provides a thread trimming mechanism of sewing machine belongs to sewing machine technical field. The wire cutting mechanism solves the technical problems that the wire cutting precision is poor and the like due to the complex structure of the wire cutting mechanism. The sewing machine comprises a base, a thread cutting mechanism comprises a motor fixedly arranged on the base, a worm wheel arranged on an output shaft of the motor, a worm interacting with the worm wheel and a movable knife rotatably connected to the base, a connecting rod is arranged between the worm and the movable knife, and the worm rotates to enable the connecting rod to drive the movable knife to swing and to be matched with the fixed knife to form cutting motion. The utility model discloses well trimming mechanism's structure is comparatively simple to reduced the trimming error, improved the precision of trimming.
Description
Technical Field
The utility model belongs to the technical field of sewing machine, a thread trimming mechanism of sewing machine is related to.
Background
The thread cutting mechanism is an important component of the sewing machine and is a typical representative of the trend automation of the sewing machine; the initial thread cutting of the industrial sewing machine is completed manually, which greatly influences the production efficiency of the sewing machine; with the development of the sewing machine to the era of computer vehicles, the automatic thread trimming function is almost standard, and the production efficiency of the sewing machine is improved while the automation degree of the sewing machine is improved.
Chinese patent (publication number: CN 107142624B; publication date: 2020-10-09) discloses a thread trimming mechanism of a sewing machine and the sewing machine comprising the thread trimming mechanism, wherein a fixed knife of the thread trimming mechanism is fixed on a shell of the sewing machine; the power mechanism is a lower shaft of the sewing machine, and a rotating piece is fixed on the lower shaft; the movable knife is arranged on the movable knife rest which is rotatably arranged in the shell of the sewing machine; the transmission mechanism comprises a first gear, a second gear, a crank and a connecting rod; the first gear is sleeved on the lower shaft, is positioned at one side of the rotating part and can rotate relative to the lower shaft; the external teeth of the first gear are meshed with the external teeth of the second gear, the crank is connected with the second gear through a crank shaft, one end of the connecting rod is connected with the crank, and the other end of the connecting rod is connected with the movable tool rest; the first gear and the rotating piece are correspondingly provided with matched engaging structures which are used for being engaged and disengaged with each other under the action of the clutch mechanism.
The thread trimming mechanism of the sewing machine disclosed in the above patent document and the sewing machine including the thread trimming mechanism have a complicated structure, which results in a large thread trimming error and a thread trimming accuracy that cannot be ensured.
Disclosure of Invention
The utility model discloses to the above-mentioned problem that prior art exists, provide a thread trimming mechanism of sewing machine, the utility model aims to solve the technical problem that: how to simplify the trimming mechanism, improve the trimming precision.
The purpose of the utility model can be realized by the following technical proposal:
the utility model provides a sewing machine's thread trimming mechanism, sewing machine includes the frame, its characterized in that, thread trimming mechanism is including setting firmly motor on the frame, setting are in motor output epaxial worm wheel, with worm wheel interact's worm and rotate to be connected move the sword on the frame, the worm with move and be equipped with the connecting rod between the sword, the worm rotates to enable the connecting rod drives move the sword swing.
The working principle is as follows: in the technical scheme, the output shaft of the motor can drive the worm wheel to rotate, the worm rotates due to the interaction of the worm wheel and the worm, the worm rotates to drive the connecting rod to move, and the movable knife swings due to the movement of the connecting rod to cut off the thread; the motor is automatically controlled independent control, and operation and debugging are all more convenient, and whole thread trimming mechanism has simplified traditional thread trimming structure and has carried out the innovation on traditional basis, and this thread trimming mechanism simple structure can effectively reduce the error of thread trimming, has improved the precision of thread trimming to reduce the cost of production, improved sewing machine's production efficiency.
In the thread trimming mechanism of the sewing machine, the worm is fixedly provided with the crank, the machine base is internally provided with the movable knife rest capable of rotating, the movable knife is fixed on the movable knife rest, and two ends of the connecting rod are respectively connected with the crank and the movable knife rest. The worm rotates to drive the crank to swing, the connecting rod moves due to the swinging of the crank, so that the movable knife rest is driven to rotate, the movable knife realizes the wire cutting motion, the crank and the connecting rod are common transmission parts, and the installation and the maintenance are very convenient.
In foretell sewing machine's thread trimming mechanism, it has shaft hole one to open in the frame, be equipped with the axle sleeve in the shaft hole one, the one end middle part of axle sleeve has and stretches out the axial region of shaft hole one, it has the confession to move the knife rest to be cake form setting and middle part open the through-hole that the axial region was worn to establish, the periphery one side of moving the knife rest has the bulge, the bulge is kept away from one side of shaft hole one has the installation department of outside extension, the one end of moving the knife is fixed the installation department outside, move the middle part of knife to the other end all protrusion in the installation department just move one side middle part of knife to the other end have the cutting edge portion that is used for the thread trimming. The arrangement of the convex part and the installation part is convenient for installing the movable knife on the movable knife rest, so that the arrangement of the movable knife cannot influence the action of the movable knife rest, and the blade part of the movable knife is arranged at the position of the movable knife protruding out of the installation part, thereby being beneficial to improving the efficiency and the precision of thread trimming.
In the thread trimming mechanism of the sewing machine, one side of the periphery of the movable knife rest, which is far away from the protruding part, is provided with a connecting part which extends outwards, and one end of the connecting rod is connected with the end part of the connecting part through a first shaft position screw. The movable tool holder is provided with the connecting part, so that the movable tool holder is conveniently connected with the connecting rod, the position of the connecting part on the movable tool holder enables the acting force of the movable tool holder on the relative position on the shaft part to be consistent, the abrasion of the shaft part can be reduced, and the service lives of the shaft part and the shaft sleeve can be prolonged.
In the thread trimming mechanism of the sewing machine, a cover plate for limiting the axial movement of the movable knife rest is fixedly arranged on the end surface of the shaft part. The cover plate plays a role in limiting the moving knife rest, the stability of the moving knife rest on the shaft part can be improved, and the normal operation of the trimming motion can be ensured.
In the thread trimming mechanism of the sewing machine, a second shaft hole and a third shaft hole are oppositely formed in the machine base, a first polished rod part and a second polished rod part which are located at two ends are arranged on the worm, a bearing is arranged on the first polished rod part, the bearing is located in the second shaft hole, a supporting sleeve located in the third shaft hole is arranged on the second polished rod part, the crank is fixedly arranged on the second polished rod part, and one end, far away from the movable knife rest, of the connecting rod is connected with the crank through a second shaft position screw. The worm is positioned in the machine base through the bearing and the supporting sleeve, so that the worm can rotate freely under the action of the worm wheel, and the rotating motion of the worm is converted into the reciprocating motion of the connecting rod by utilizing the crank, thereby realizing the thread trimming action of the movable knife, and being very simple, convenient and practical.
In the thread trimming mechanism of the sewing machine, the motor is fixed on the outer side of the base, a mounting hole for the output shaft of the motor to penetrate is formed in the side face of the base, the worm wheel is located in the base and fixed at the end part of the output shaft of the motor, and the output shaft of the motor is perpendicular to the worm. The worm wheel is directly fixed at the end part of the output shaft of the motor, and convenience is provided for the installation of the worm wheel and the positioning of the worm.
Compared with the prior art, the utility model provides a motor passes through the worm wheel drive worm and rotates, recycles the crank and will rotate the reciprocating motion that converts the connecting rod into, and then the drive moves the tool rest and moves the tool swing to the realization moves the trimming motion of tool, trimming mechanism's structure is fairly simple, and the motor is automatically controlled independent control, and it is less to make the error when making the tool trim, thereby has improved the precision of trimming.
Drawings
Fig. 1 is a schematic perspective view of a thread trimming mechanism of the sewing machine.
Fig. 2 is a schematic structural view of a base in the thread trimming mechanism of the sewing machine.
Fig. 3 is a schematic structural view of a thread trimming mechanism in the thread trimming mechanism of the sewing machine.
Fig. 4 is an exploded view of a thread trimming mechanism in the thread trimming mechanism of the present sewing machine.
Fig. 5 is a partial exploded view of the thread trimming mechanism of the present sewing machine.
In the figure, 1, a machine base; 1a, a first shaft hole; 1b, a second shaft hole; 1c, a third shaft hole; 2. a motor; 3. a worm gear; 4. a worm; 4a, a polished rod part I; 4b, a polished rod part II; 5. moving a knife; 5a, a knife edge part; 6. a connecting rod; 7. a crank; 8. a movable knife rest; 8a, a through hole; 8b, a projection; 8c, an installation part; 8d, a connecting part; 9. a shaft sleeve; 9a, a shaft portion; 10. a first axial position screw; 11. a cover plate; 12. a bearing; 13. a support sleeve; 14. and a second shaft is positioned on the screw.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 5, the sewing machine in this embodiment includes a base 1, the thread trimming mechanism includes a motor 2, a worm wheel 3, a worm 4, a connecting rod 6, a movable knife holder 8 and a movable knife 5, the motor 2 is fixedly arranged on the outer side of the base 1, a mounting hole for the output shaft of the motor 2 to penetrate is formed on the side surface of the base 1, the worm wheel 3 is arranged in the base 1, the worm wheel 3 is fixed on the end portion of the output shaft of the motor 2, the worm 4 is arranged in the base 1, the worm wheel 3 is arranged on one side of the worm 4, the worm 4 is perpendicular to the output shaft of the motor 2, a shaft hole 1a is formed in the base 1, a shaft sleeve 9 is arranged in the shaft hole 1a, a shaft portion 9a extending out of the shaft hole 1a is formed in the middle of one end of the shaft sleeve 9, the movable knife holder 8 is arranged in a pie shape, a through hole 8a for the shaft portion 9a to penetrate is formed in the middle of the movable knife holder 8, a cover plate 11 for limiting the axial movement of the movable knife holder 8 is arranged on the end portion of the shaft portion, a side of the outer periphery of the movable knife holder 8 is provided with a protruding portion 8b, one side of the protruding portion 8b, which is far away from the first shaft hole 1a, is provided with an installation portion 8c extending outwards, one end of the movable knife 5 is fixedly arranged on the outer side of the installation portion 8c, the middle portion to the other end of the movable knife 5 protrudes out of the installation portion 8c, the middle portion to the other end of one side of the movable knife 5 is provided with a knife edge portion 5a used for trimming, one side of the periphery of the movable knife rest 8, which is far away from the protruding portion 8b, is provided with a connecting portion 8d extending outwards, and one end of the connecting rod 6 is connected with the end portion of the connecting portion 8d through a first shaft position screw 10.
Further, as shown in fig. 1 to 4, a shaft hole two 1b and a shaft hole three 1c are formed in the base 1, a bearing 12 is arranged in the shaft hole two 1b, a supporting sleeve 13 is arranged in the shaft hole three 1c, a polish rod portion one 4a and a polish rod portion two 4b are arranged on the worm 4, the polish rod portion one 4a is arranged in the middle of one side of the bearing 12 in a penetrating mode, the supporting sleeve 13 is sleeved on the polish rod portion two 4b, a crank 7 is further arranged on the polish rod portion two 4b, one end of the crank 7 is fixed on the polish rod portion two 4b, and the other end of the crank 7 is connected with the other end of the connecting rod 6 through a shaft position screw two 14.
The motor 2 is started, the output shaft of the motor 2 rotates forward and backward to drive the worm wheel 3 positioned at the end part of the output shaft to rotate, the worm wheel 3 and the worm 4 interact to drive the worm 4 to rotate, the crank 7 swings along with the worm wheel, and then the connecting rod 6 is driven to reciprocate towards the movable knife rest 8 and away from the movable knife rest 8, so that the movable knife rest 8 can be driven to rotate on the shaft part 9a of the shaft sleeve 9, the movable knife 5 fixed on the movable knife rest 8 swings, and the movable knife 5 and the fixed knife are matched to form a shearing action, so that the wire shearing movement is carried out.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. The utility model provides a sewing machine's thread trimming mechanism, sewing machine includes frame (1), its characterized in that, thread trimming mechanism is including setting firmly motor (2) on frame (1), setting are in worm wheel (3) on motor (2) output shaft, with worm (4) and the rotation of worm wheel (3) interact are connected move sword (5) on frame (1), worm (4) with move and be equipped with connecting rod (6) between sword (5), worm (4) rotate and enable connecting rod (6) drive move sword (5) swing.
2. The thread trimming mechanism of a sewing machine according to claim 1, wherein a crank (7) is fixedly arranged on the worm (4), a movable knife rest (8) capable of rotating is arranged in the machine base (1), the movable knife (5) is fixed on the movable knife rest (8), and two ends of the connecting rod (6) are respectively connected with the crank (7) and the movable knife rest (8).
3. The thread trimming mechanism for sewing machines according to claim 2, wherein the base (1) has a first axial hole (1a) formed therein, a shaft sleeve (9) is arranged in the first shaft hole (1a), the middle part of one end of the shaft sleeve (9) is provided with a shaft part (9a) extending out of the first shaft hole (1a), the movable knife rest (8) is arranged in a round cake shape, the middle part of the movable knife rest is provided with a through hole (8a) for the shaft part (9a) to penetrate through, one side of the periphery of the movable knife rest (8) is provided with a convex part (8b), one side of the convex part (8b) far away from the first shaft hole (1a) is provided with an installation part (8c) extending outwards, move the one end of sword (5) and fix installation department (8c) outside, move the middle part to the other end of sword (5) all protrusion in installation department (8c) just move one side middle part to the other end of sword (5) and have sword blade portion (5a) that are used for the trimming.
4. The thread trimming mechanism of a sewing machine according to claim 3, wherein the movable knife holder (8) has a connecting portion (8d) extending outward on a side of the outer periphery thereof away from the protruding portion (8b), and one end of the connecting rod (6) is connected to an end of the connecting portion (8d) by a first shaft screw (10).
5. The thread trimming mechanism of a sewing machine according to claim 3 or 4, wherein a cover plate (11) for restricting the axial movement of the movable blade holder (8) is fixedly provided on the end surface of the shaft portion (9 a).
6. The thread trimming mechanism of a sewing machine according to claim 4, wherein a second shaft hole (1b) and a third shaft hole (1c) are formed in the machine base (1) in a relative manner, the worm (4) is provided with a first polished rod part (4a) and a second polished rod part (4b) which are positioned at two ends, the first polished rod part (4a) is provided with a bearing (12), the bearing (12) is positioned in the second shaft hole (1b), the second polished rod part (4b) is provided with a supporting sleeve (13) which is positioned in the third shaft hole (1c), the crank (7) is fixedly arranged on the second polished rod part (4b), and one end of the connecting rod (6) far away from the movable knife rest (8) is connected with the crank (7) through a second shaft position screw (14).
7. The thread trimming mechanism of a sewing machine according to claim 1, wherein the motor (2) is fixed on the outer side of the base (1), a mounting hole for the output shaft of the motor (2) to pass through is formed on the side surface of the base (1), the worm wheel (3) is positioned in the base (1) and fixed on the end part of the output shaft of the motor (2), and the output shaft of the motor (2) is perpendicular to the worm (4).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023102104.3U CN214219042U (en) | 2020-12-21 | 2020-12-21 | Thread cutting mechanism of sewing machine |
| PCT/CN2021/136682 WO2022135161A1 (en) | 2020-12-21 | 2021-12-09 | Thread trimming mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023102104.3U CN214219042U (en) | 2020-12-21 | 2020-12-21 | Thread cutting mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214219042U true CN214219042U (en) | 2021-09-17 |
Family
ID=77703876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023102104.3U Active CN214219042U (en) | 2020-12-21 | 2020-12-21 | Thread cutting mechanism of sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN214219042U (en) |
| WO (1) | WO2022135161A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022135161A1 (en) * | 2020-12-21 | 2022-06-30 | 浙江美机缝纫机有限公司 | Thread trimming mechanism of sewing machine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57142290A (en) * | 1981-02-26 | 1982-09-02 | Aisin Seiki | Cutter for sewing thread in sewing machine |
| JPH079278U (en) * | 1993-07-16 | 1995-02-10 | シンガー日鋼株式会社 | Thread trimming device for lockstitch bar tacking sewing machine |
| CN206279337U (en) * | 2016-12-02 | 2017-06-27 | 浙江宝宇缝纫机有限公司 | A kind of thread cutting mechanism of sewing machine |
| CN208346425U (en) * | 2018-05-31 | 2019-01-08 | 浙江中捷缝纫科技有限公司 | A kind of thread cutting mechanism of sewing machine |
| CN208486050U (en) * | 2018-06-22 | 2019-02-12 | 浙江乐江机械有限公司 | A kind of automatic thread trimming device |
| CN210796877U (en) * | 2019-05-27 | 2020-06-19 | 浙江沪龙科技股份有限公司 | Perpendicular installation formula electron trimming mechanism |
| CN211897357U (en) * | 2019-06-26 | 2020-11-10 | 浙江多乐缝纫机有限公司 | Thread trimming device and sewing machine with same |
| CN210712047U (en) * | 2019-09-17 | 2020-06-09 | 浙江中捷缝纫科技有限公司 | Thread cutting driving device and sewing machine with same |
| CN214219042U (en) * | 2020-12-21 | 2021-09-17 | 浙江美机缝纫机有限公司 | Thread cutting mechanism of sewing machine |
-
2020
- 2020-12-21 CN CN202023102104.3U patent/CN214219042U/en active Active
-
2021
- 2021-12-09 WO PCT/CN2021/136682 patent/WO2022135161A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022135161A1 (en) * | 2020-12-21 | 2022-06-30 | 浙江美机缝纫机有限公司 | Thread trimming mechanism of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022135161A1 (en) | 2022-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214219042U (en) | Thread cutting mechanism of sewing machine | |
| CN212247421U (en) | Presser foot device is lifted to sewing machine's trimming | |
| CN212071307U (en) | Machining cutter blade angle grinding device | |
| CN209957999U (en) | Cloth feeding adjusting mechanism of sewing machine | |
| CN216107539U (en) | Sewing machine | |
| CN213954285U (en) | Telescopic mechanism | |
| CN115247325A (en) | Adjusting device and sewing machine | |
| CN213638976U (en) | Hedge shears transmission mechanism | |
| CN212270404U (en) | Thread cutting mechanism of sewing machine | |
| CN212978804U (en) | Carving and cutting integrated machine | |
| CN210122619U (en) | Feed dog driving mechanism of sewing machine | |
| CN215251626U (en) | Adjusting device and sewing machine | |
| CN210506768U (en) | Bottom shuttle thread trimming structure of rotary template sewing machine | |
| CN214572630U (en) | Wire cutting mechanism of flat roller car | |
| CN215746660U (en) | Milling machine convenient to go up and down | |
| CN112276181A (en) | Milling machine is used in aluminum alloy wheel hub processing of convenient location | |
| CN106757848B (en) | Thread cutting mechanism of industrial sewing machine | |
| CN218880284U (en) | Thread cutting mechanism of sewing machine | |
| CN216074301U (en) | Thread cutting mechanism of sewing machine | |
| CN217600999U (en) | Motor-driven thread trimming mechanism of sewing machine | |
| CN219005391U (en) | Multi-material cutting machine with high-efficiency adjustable cutting head | |
| CN221818071U (en) | Reciprocal translation interaction device of digit control machine tool | |
| CN211713370U (en) | Motor thread trimming mechanism of sewing machine | |
| CN213531858U (en) | Automatic sharpener of cutter that whets a knife | |
| CN214265752U (en) | Big circular cutter lifting structure of cotton soft towel cutter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 317502 No.8 Jinxiu Road, Xinhe Town, Wenling City, Taizhou City, Zhejiang Province Patentee after: Meiji Technology Group Co.,Ltd. Address before: 317502 Zhongxiang Industrial Zone, Xinhe Town, Wenling City, Taizhou City, Zhejiang Province Patentee before: ZHEJIANG MAQI SEWING MACHINE Co.,Ltd. |