CN107034597A - The thread cutting mechanism of sewing machine - Google Patents
The thread cutting mechanism of sewing machine Download PDFInfo
- Publication number
- CN107034597A CN107034597A CN201710451937.4A CN201710451937A CN107034597A CN 107034597 A CN107034597 A CN 107034597A CN 201710451937 A CN201710451937 A CN 201710451937A CN 107034597 A CN107034597 A CN 107034597A
- Authority
- CN
- China
- Prior art keywords
- trimming
- moving knife
- knife
- secondary moving
- driving
- 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.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a kind of thread cutting mechanism of sewing machine, including trimming drive shaft, trimming drive shaft is fixedly connected with trimming crank；One end of the trimming crank and driving knife connecting rod is hinged, and the other end and the driving knife group of driving knife connecting rod are hinged；Driving knife is provided with driving knife group；The stage casing of the trimming drive shaft auxiliary connection moving knife swing rod, one end of secondary moving knife swing rod is fixedly connected with trimming crank, and one end of the other end of secondary moving knife swing rod and secondary moving knife connecting rod is hinged, and the other end of secondary moving knife connecting rod is hinged with secondary movable cutter set；Secondary moving knife is provided with secondary movable cutter set.The present invention, come the linkage of drivening rod mechanism, so as to realize that driving knife is engaged with pair moving knife, reaches the purpose of trimming by the swing of trimming drive shaft.
Description
Technical field
The present invention relates to a kind of annex of sewing machine, and in particular to a kind of thread cutting mechanism of sewing machine.
Background technology
The thread cutting mechanism of existing sewing machine is typically all made up of stationary knife, moving knife, connecting rod and drive shaft, and stationary knife is fixedly mounted
On casing；Moving knife is arranged on movable knife rack, by drive shaft drivening rod, and then drives movable knife rack, moving knife is moved towards stationary knife,
Reach the purpose of closure trimming.
The stitching of sewing machine is mainly what is formed by the motion of eedle and rotating shuttle, in order to which in the state of sewing, suture does not touch knife
Mouthful, moving knife and stationary knife must avoid the range of movement of movable part, and stationary knife is fixed on the side of eedle, had between stationary knife and eedle
A certain distance, this causes moving knife also to have certain distance with the position of stationary knife blade overlaying and articulation and eedle, and then causes trimming
The end of a thread remained afterwards on sewed product is long unstable with the end of a thread length on eedle.And long the end of a thread on sewed product then needs to increase
Plus the process of artificial trimming the end of a thread, the unstable rule of the end of a thread length on eedle can cause sewing next time bad stitching, influence occur
Quality of sewing.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of thread cutting mechanism of sewing machine, and it can be with simpler, fast
The solution problem above of prompt and high reliability.
In order to solve the above technical problems, the technical solution of the thread cutting mechanism of sewing machine of the present invention is：
Including trimming drive shaft 1, trimming drive shaft 1 is fixedly connected with one end of trimming crank 3；Trimming crank 3 can drive in trimming
Swung under the drive of moving axis 1 around the end；The stage casing of the trimming crank 3 offers the first connecting hole and the second connecting hole；Trimming
Crank 3 connects one end of driving knife connecting rod 6 by the first connecting hole, and the other end of driving knife connecting rod 6 is connected with driving knife group 7
Connect；Driving knife 7a is provided with driving knife group 7；The drive end that trimming crank 3 passes through the second connecting hole auxiliary connection moving knife swing rod 4；
The driven end of secondary moving knife swing rod 4 is connected with one end of secondary moving knife connecting rod 5, the other end auxiliary connection movable cutter set of secondary moving knife connecting rod 5
8；Secondary moving knife 8a is provided with secondary movable cutter set 8；The middle part of secondary moving knife swing rod 4 is sheathed in trimming drive shaft 1；The trimming crank
3 are hinged with one end of driving knife connecting rod 6, and the other end and the driving knife group 7 of driving knife connecting rod 6 are hinged；It is provided with driving knife group 7
Driving knife 7a；The stage casing of the auxiliary connection moving knife swing rod 4 of trimming drive shaft 1, one end of secondary moving knife swing rod 4 is fixedly connected with trimming song
Handle 3, one end of the other end of secondary moving knife swing rod 4 and secondary moving knife connecting rod 5 is hinged, the other end of secondary moving knife connecting rod 5 and secondary movable cutter set 8
It is hinged；Secondary moving knife 8a is provided with secondary movable cutter set 8；The trimming drive shaft 1 being rotated by driving source, drive is cut
Line crank 3 is swung；The driving knife connecting rod 6 that swings by of trimming crank 3 drives driving knife group 7 to rotate forward；At the same time, trimming
Crank 3 swing by secondary moving knife swing rod 4 and secondary moving knife connecting rod 5 drives secondary movable cutter set 8 to rotate backward, driving knife 7a is moved with pair
Knife 8a is engaged, and completes trimming action.
The driving knife group 7 and secondary movable cutter set 8 are movably set in the step section of axle sleeve 9, driving knife group 7 and secondary movable cutter set 8
Can around axle sleeve 9 center rotating.
The trimming crank 3 connects return spring 2.
Three holes are offered on the secondary moving knife swing rod 4, the drive end of secondary moving knife swing rod 4, secondary moving knife pendulum are opened in respectively
The middle part of the driven end of bar 4 and secondary moving knife swing rod 4, three holes are into angular distribution.
Coordinate between the secondary moving knife swing rod 4 and trimming drive shaft 1 for gap.
The trimming drive shaft 1 is arranged in casing 100.
What the present invention can reach has the technical effect that：
The present invention by the swing of trimming drive shaft come the linkage of drivening rod mechanism, so as to realize that driving knife is stung with pair moving knife
Close, reach the purpose of trimming.
The present invention has simple and compact for structure, biting point stable, and cutting position makes to have cut line setting in the underface of eedle
The advantages of the end of a thread is shorter.
The present invention can be precisely controlled trimming position, and trimming the end of a thread is short, and the end of a thread is subtracted so as to reduce cost without artificial.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：
Fig. 1 is scheme of installation of the thread cutting mechanism of sewing machine of the present invention in sewing machine case；
Fig. 2 is the schematic perspective view of the present invention；
Fig. 3 is the schematic perspective view of the linkage of the present invention；
Fig. 4 is the decomposer schematic diagram of the linkage of the present invention.
Description of reference numerals in figure：
1 is trimming drive shaft, and 2 be return spring,
3 be trimming crank, and 4 be secondary moving knife swing rod,
5 be secondary moving knife connecting rod, and 6 be driving knife connecting rod,
7 be main movable cutter set, and 8 be secondary movable cutter set,
9 be axle sleeve, and 7a is driving knife,
8a is secondary moving knife, and 100 be casing.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme to the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of embodiment, rather than whole embodiments.Based on described embodiments of the invention, ordinary skill
The every other embodiment that personnel are obtained on the premise of without creative work, belongs to the scope of protection of the invention.Remove
Non- other definition, technical term or scientific terminology used herein are should be in art of the present invention with general technical ability
The ordinary meaning that personage is understood.The similar word such as " comprising " used herein mean to occur element before the word or
Object is covered the element or object for appearing in the word presented hereinafter and its is equal, and is not excluded for other elements or object.
As shown in Figures 1 to 4, the thread cutting mechanism of sewing machine of the present invention, including trimming drive shaft 1, trimming drive shaft 1 are installed
In casing 100；Trimming drive shaft 1 is fixedly connected with one end of trimming crank 3；Trimming crank 3 can trimming drive shaft 1 band
Swung under dynamic around the end；
The stage casing of trimming crank 3 offers the first connecting hole and the second connecting hole；
Trimming crank 3 by being arranged in one end of the mode connects for screw driving knife connecting rod 6 of the first connecting hole, driving knife connecting rod 6 it is another
One end is connected with driving knife group 7；
The drive end that trimming crank 3 passes through the secondary moving knife swing rod 4 of the mode connects for screw for being arranged in the second connecting hole；Secondary moving knife swing rod 4
Driven end is connected by axial screw with one end of secondary moving knife connecting rod 5, the other end auxiliary connection movable cutter set 8 of secondary moving knife connecting rod 5；
The middle part of secondary moving knife swing rod 4 is sheathed in trimming drive shaft 1, is matched somebody with somebody between secondary moving knife swing rod 4 and trimming drive shaft 1 for gap
Close；
Three holes are offered on secondary moving knife swing rod 4, be opened in respectively the drive end of secondary moving knife swing rod 4, secondary moving knife swing rod 4 it is driven
End and the middle part of secondary moving knife swing rod 4, three holes are into angular distribution；
Return spring 2 is housed in trimming drive shaft 1；One end connection trimming crank 3 of return spring 2, the other end connection of return spring 2 is cut
Line drive shaft 1, return spring 2 resets for thread trimmer group.
Driving knife group 7 and secondary movable cutter set 8 are movably set in the step section of axle sleeve 9, can around axle sleeve 9 center rotating.
Driving knife 7a is provided with driving knife group 7；Secondary moving knife 8a is provided with secondary movable cutter set 8.
The course of work of the present invention is as follows；
Trimming drive shaft 1 is rotated forward under the driving of driving source, drives trimming crank 3 to swing；Trimming crank 3 is swung by
Driving knife connecting rod 6 drives driving knife group 7 to be rotated forward around the centre of gyration of axle sleeve 9；At the same time, the swing of trimming crank 3 is led to
Cross secondary moving knife swing rod 4 and secondary moving knife connecting rod 5 drives secondary movable cutter set 8 to be rotated backward around the centre of gyration of axle sleeve 9；Due to driving knife group
7 with the rotation direction of secondary movable cutter set 8 on the contrary, making driving knife 7a be engaged with pair moving knife 8a, completion trimming is acted；
After driving source disconnects, trimming crank 3 resets in the presence of return spring 2, resets driving knife 7a and secondary moving knife 8a, so that
Complete the process of a trimming.
Although embodiments of the present invention are hereinbefore described in detail, show for those skilled in the art
And be clear to, various modifications and variations can be carried out to these embodiments.However, it is understood that this modifications and variations are all
Belong within the scope and spirit of the present invention described in claims.Moreover, the present invention described herein can have others
Embodiment, and can be practiced or carried out in several ways.
Claims (6)
1. a kind of thread cutting mechanism of sewing machine, it is characterised in that：Including trimming drive shaft（1）, trimming drive shaft（1）It is fixedly connected
Trimming crank（3）One end；Trimming crank（3）Can be in trimming drive shaft（1）Drive under around the end swing；
The trimming crank（3）Stage casing offer the first connecting hole and the second connecting hole；
Trimming crank（3）Driving knife connecting rod is connected by the first connecting hole（6）One end, driving knife connecting rod（6）The other end with
Driving knife group（7）It is connected；Driving knife group（7）On be provided with driving knife（7a）；
Trimming crank（3）Pass through the second connecting hole auxiliary connection moving knife swing rod（4）Drive end；Secondary moving knife swing rod（4）Driven end
With secondary moving knife connecting rod（5）One end be connected, secondary moving knife connecting rod（5）Other end auxiliary connection movable cutter set（8）；Secondary movable cutter set（8）
On be provided with secondary moving knife（8a）；
Secondary moving knife swing rod（4）Middle part be sheathed on trimming drive shaft（1）On；
The trimming drive shaft（1）Being capable of being rotated by driving source, drive trimming crank（3）Swing；Trimming crank（3）
Swing by driving knife connecting rod（6）Drive driving knife group（7）Rotate forward；At the same time, trimming crank（3）Swing by
Secondary moving knife swing rod（4）And secondary moving knife connecting rod（5）Drive secondary movable cutter set（8）Rotate backward, make driving knife（7a）With secondary moving knife（8a）
Occlusion, completes trimming action.
2. the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The driving knife group（7）With secondary moving knife
Group（8）It is movably set in axle sleeve（9）Step section, driving knife group（7）With secondary movable cutter set（8）Can be around axle sleeve（9）Center turn
It is dynamic.
3. the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The trimming crank（3）Connection resets
Spring（2）.
4. the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The secondary moving knife swing rod（4）On open up
There are three holes, secondary moving knife swing rod is opened in respectively（4）Drive end, secondary moving knife swing rod（4）Driven end and secondary moving knife swing rod（4）
Middle part, three holes are into angular distribution.
5. the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The secondary moving knife swing rod（4）With trimming
Drive shaft（1）Between for gap coordinate.
6. the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The trimming drive shaft（1）It is arranged on
Casing（100）It is interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710451937.4A CN107034597A (en) | 2017-06-15 | 2017-06-15 | The thread cutting mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710451937.4A CN107034597A (en) | 2017-06-15 | 2017-06-15 | The thread cutting mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107034597A true CN107034597A (en) | 2017-08-11 |
Family
ID=59541252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710451937.4A Withdrawn CN107034597A (en) | 2017-06-15 | 2017-06-15 | The thread cutting mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107034597A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3142396U (en) * | 2008-03-31 | 2008-06-12 | 啓翔股▲ふん▼有限公司 | Sewing machine cutting equipment |
| CN102605571A (en) * | 2012-04-05 | 2012-07-25 | 宁波舒普机电科技有限公司 | Double-needle loop sewing machine with thread cutting structure |
| CN202519464U (en) * | 2012-04-23 | 2012-11-07 | 温州欧罗华实业有限公司 | Single-motor multi-gold-piece device and embroidering machine with same |
| CN203229744U (en) * | 2012-03-30 | 2013-10-09 | 兄弟工业株式会社 | Sewing machine |
| CN205205442U (en) * | 2015-10-15 | 2016-05-04 | 浙江上工宝石缝纫科技有限公司 | Sewing machine's thread trimming mechanism |
| CN206204583U (en) * | 2016-10-21 | 2017-05-31 | 西安标准工业股份有限公司 | A kind of industrial sewing machine tangent mechanism |
| CN206783954U (en) * | 2017-06-15 | 2017-12-22 | 浙江美机缝纫机有限公司 | The thread cutting mechanism of sewing machine |
-
2017
- 2017-06-15 CN CN201710451937.4A patent/CN107034597A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3142396U (en) * | 2008-03-31 | 2008-06-12 | 啓翔股▲ふん▼有限公司 | Sewing machine cutting equipment |
| CN203229744U (en) * | 2012-03-30 | 2013-10-09 | 兄弟工业株式会社 | Sewing machine |
| CN102605571A (en) * | 2012-04-05 | 2012-07-25 | 宁波舒普机电科技有限公司 | Double-needle loop sewing machine with thread cutting structure |
| CN202519464U (en) * | 2012-04-23 | 2012-11-07 | 温州欧罗华实业有限公司 | Single-motor multi-gold-piece device and embroidering machine with same |
| CN205205442U (en) * | 2015-10-15 | 2016-05-04 | 浙江上工宝石缝纫科技有限公司 | Sewing machine's thread trimming mechanism |
| CN206204583U (en) * | 2016-10-21 | 2017-05-31 | 西安标准工业股份有限公司 | A kind of industrial sewing machine tangent mechanism |
| CN206783954U (en) * | 2017-06-15 | 2017-12-22 | 浙江美机缝纫机有限公司 | The thread cutting mechanism of sewing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170811 |