CN206783952U - The driving of sewing machine and thread cutting mechanism - Google Patents
The driving of sewing machine and thread cutting mechanism Download PDFInfo
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- CN206783952U CN206783952U CN201720696184.9U CN201720696184U CN206783952U CN 206783952 U CN206783952 U CN 206783952U CN 201720696184 U CN201720696184 U CN 201720696184U CN 206783952 U CN206783952 U CN 206783952U
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- trimming
- driving
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- drive
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Abstract
The utility model discloses a kind of driving of sewing machine and thread cutting mechanism, including drive mechanism and thread cutting mechanism；The drive mechanism includes power transmission shaft and drive shaft, and trimming driving cam crank assemblies are fixedly installed in drive shaft；The thread cutting mechanism includes trimming drive shaft, and trimming drive shaft is fixedly connected with trimming driving cam crank assemblies；The rotation of trimming driving cam crank assemblies can drive trimming drive shaft turns, and the rotation of trimming drive shaft drives trimming crank-swinging；The driving knife connecting rod that swings by of trimming crank drives driving knife group to rotate forward；At the same time, swing by secondary moving knife swing rod and the secondary moving knife connecting rod of trimming crank drive secondary movable cutter set to rotate backward, and driving knife is engaged with secondary moving knife, are acted so as to complete trimming.The control of the utility model trimming is accurate, and trimming biting point is stable, and trimming the end of a thread is short, without manually subtracting the end of a thread so as to reduce cost.
Description
Technical field
It the utility model is related to a kind of annex of sewing machine, and in particular to a kind of driving of sewing machine and thread cutting mechanism.
Background technology
With the automaticity more and more higher of sewing machine, artificial operation is originally much needed, is all had been achieved with automatic
Change, such as the automatic shearing in sewing machine.Cutting facility generally comprises drive mechanism, transmission mechanism and thread cutting mechanism, drive mechanism
Electromagnet or cylinder are all typically used, is connected between thread cutting mechanism and drive mechanism by transmission mechanism.Existing transmission
Mechanism structure is complicated, control precision difference and thread cutting mechanism trimming are unstable, and the end of a thread is different in size, causes quality of sewing difference and needs
Increase the process of artificial trimming the end of a thread.
As Chinese utility model patent document ZL94112770.2 discloses a kind of apparatus for controlling cutting thread of sewing machine, it is cut
Line transmission mechanism includes trimming cam, trimming cam arm, the trimming bar linkage structure being connected with cutting assemblies and connected with drive mechanism
Trimming arm connect etc. drives drive mechanism, and its trimming bar linkage structure and driving drive mechanism are excessively complicated, constitutional detail is more, transmission
Efficiency is low and cost is high.
The content of the invention
Technical problem to be solved in the utility model is to provide driving and the thread cutting mechanism of a kind of sewing machine, and it can be more
Add and simple, quick and high reliability go solve problem above.
In order to solve the above technical problems, the driving of the utility model sewing machine and the technical solution of thread cutting mechanism are：
Including drive mechanism and thread cutting mechanism；The drive mechanism includes power transmission shaft 1 and drive shaft 13, consolidates on power transmission shaft 1
Surely driving cam 2 is provided with, formed with the first cam surface 2a and the second cam surface 2b in driving cam 2；It is fixed in drive shaft 13
Trimming driving cam crank assemblies 3 are provided with, roller 3a, return pin 3b and cunning are provided with trimming driving cam crank assemblies 3
Block 3c；The roller 3a of trimming driving cam crank assemblies 3 is corresponding with the first cam surface 2a of driving cam 2；Under trimming state,
Drive shaft 13 is rotated in the presence of driving source, and trimming driving cam crank assemblies 3 and roller 3a thereon can be driven to rotate,
Roller 3a is set to be rolled on the first cam surface 2a, so as to drive power transmission shaft 1 to rotate；The reset of trimming driving cam crank assemblies 3
It is corresponding with the second cam surface 2b of driving cam 2 to sell 3b；When trimming is completed, the second cam surface 2b and return pin 3b is touched, energy
Enough make the forced resetting of trimming driving cam component 3；The thread cutting mechanism includes trimming drive shaft 5, and trimming drive shaft 5 is fixedly connected
Trimming driving cam crank assemblies 3；The rotation of trimming driving cam crank assemblies 3 can drive trimming drive shaft 5 to rotate；Trimming
Drive shaft 5 is fixedly connected with one end of trimming crank 7；Trimming crank 7 can be swung under the drive of trimming drive shaft 5 around the end；
The stage casing of trimming crank 7 offers the first connecting hole and the second connecting hole；Trimming crank 7 connects driving knife by the first connecting hole
One end of connecting rod 10, the other end of driving knife connecting rod 10 are connected with driving knife group 11；Driving knife is provided with driving knife group 11
11a；The drive end that trimming crank 7 passes through the second connecting hole auxiliary connection moving knife swing rod 8；The driven end of secondary moving knife swing rod 8 moves with pair
One end of knife connecting rod 9 is connected, the other end auxiliary connection movable cutter set 12 of secondary moving knife connecting rod 9；Pair is provided with secondary movable cutter set 12
Moving knife 12a；The middle part of secondary moving knife swing rod 8 is sheathed in trimming drive shaft 5；The rotation of trimming driving cam crank assemblies 3 can
Trimming drive shaft 5 is driven to rotate, the rotation of trimming drive shaft 5 drives trimming crank 7 to swing；Trimming crank 7 swings by master
Moving knife connecting rod 10 drives driving knife group 11 to rotate forward；At the same time, trimming crank 7 swings by secondary moving knife swing rod 8 and pair
Moving knife connecting rod 9 drives secondary movable cutter set 12 to rotate backward, and driving knife 11a is engaged with secondary moving knife 12a, so as to complete trimming action.
One end of the drive shaft 13 is provided with compression spring 4；When drive shaft 13 driving source be rotated by it is same
When, compression spring 4 can be made to store elastic force potential energy, compression spring 4 can reset drive shaft 13 after driving source disconnects.
Knife rest torsion spring 6 is housed in the trimming drive shaft 5；One end connection trimming crank 7 of knife rest torsion spring 6, knife rest torsion spring 6
Other end connection trimming drive shaft 5, knife rest torsion spring 6 is used for the reset of thread trimmer group.
Three holes are offered on the secondary moving knife swing rod 8, are opened in drive end, the secondary moving knife pendulum of secondary moving knife swing rod 8 respectively
The middle part of the driven end of bar 8 and secondary moving knife swing rod 8, three holes are into angular distribution.
Coordinate between the secondary moving knife swing rod 8 and trimming drive shaft 5 for gap.
The open slot of the trimming drive shaft 5 is engaged with the sliding block 3c of the trimming driving cam crank assemblies 3, trimming
Driving cam crank assemblies 3 are fixedly connected with trimming drive shaft 5 by sliding block 3c.
The drive shaft 13 be arranged in parallel with power transmission shaft 1.
The trimming drive shaft 5 be arranged in parallel with drive shaft 13.
The driving source is electromagnet or cylinder.
Under original state, the roller 3a of the trimming driving cam crank assemblies 3 and the first cam surface 2a of driving cam 2
In the state that staggers；
Under trimming state, drive shaft 13 rotates in the presence of driving source, drive trimming driving cam crank assemblies 3 and its
On roller 3a rotate, the ball 3a of trimming driving cam crank assemblies 3 is connected with the first cam surface 2a of driving cam 2
Touch, while compression spring 4 is in compressive state；Drive shaft 13 is rotated further, and makes roller 3a in the first cam of driving cam 2
Rolled on the 2a of face, drive driving cam 2 to rotate, so that power transmission shaft 1 rotates；The rotation of power transmission shaft 1 drives the second cam surface 2b
Synchronous axial system, until the second cam surface 2b of driving cam 2 is in contact with the return pin 3b on trimming driving cam component 3；With
This simultaneously, the rotations of trimming driving cam crank assemblies 3 drives trimming drive shaft 5 to rotate, and the rotation of trimming drive shaft 5, which drives, cuts
Line crank 7 is swung；The driving knife connecting rod 10 that swings by of trimming crank 7 drives driving knife group 11 to rotate forward；At the same time, cut
Line crank 7 swing by secondary moving knife swing rod 8 and secondary moving knife connecting rod 9 drives secondary movable cutter set 12 to rotate backward, make driving knife 11a with
Secondary moving knife 12a occlusions, so as to complete trimming action；
After driving source disconnects, trimming crank 7 resets in the presence of knife rest torsion spring 6, makes driving knife 11a and secondary moving knife 12a
Reset；At the same time, compression spring 4 resets drive shaft 13 and trimming driving cam component 3.
What the utility model can reach has the technical effect that：
The utility model has the advantages that simple and compact for structure, convenient for installation and maintenance and high reliability and low cost.
The control of the utility model trimming is accurate, and trimming biting point is stable, and trimming the end of a thread is short, without manually subtracting the end of a thread so as to drop
Low cost.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description：
Fig. 1 is the driving of the utility model sewing machine and thread cutting mechanism is arranged on schematic perspective view in casing；
Fig. 2 is schematic perspective view of the present utility model；
Fig. 3 is the schematic perspective view of another angle of the present utility model；
Fig. 4 is the decomposing schematic representation of linkage of the present utility model.
Description of reference numerals in figure：
1 is power transmission shaft, and 2 be driving cam,
3 be trimming driving cam crank assemblies, and 4 be compression spring,
5 be trimming drive shaft, and 6 be knife rest torsion spring,
7 be trimming crank, and 8 be secondary moving knife swing rod,
9 be secondary moving knife connecting rod, and 10 be driving knife connecting rod,
11 be main movable cutter set, and 12 be secondary movable cutter set,
13 be drive shaft, and 2a is the first cam surface,
2b is the second cam surface, and 3a is roller,
3b is return pin, and 3c is sliding block,
11a is driving knife, and 12a is secondary moving knife,
100 be casing.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
The accompanying drawing of type embodiment, the technical scheme of the utility model embodiment is clearly and completely described.Obviously, it is described
Embodiment is part of the embodiment of the present utility model, rather than whole embodiments.Based on described of the present utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained on the premise of without creative work, all belongs to
In the scope of the utility model protection.Unless otherwise defined, technical term or scientific terminology used herein should be this reality
With the ordinary meaning that there is the personage of general technical ability to be understood in new art." first " used herein, " second "
And similar word is not offered as any order, quantity or importance, and it is used only to distinguish different parts.
The similar word such as " comprising " means to occur element before the word or object covers the element for appearing in the word presented hereinafter
Or object and its equivalent, and it is not excluded for other elements or object.
As shown in Figure 1 to Figure 3, the driving of the utility model sewing machine and thread cutting mechanism, including drive mechanism and thread trimmer
Structure；
Drive mechanism includes the power transmission shaft 1 and drive shaft 13 being arranged in casing 100, and drive shaft 13 is parallel with power transmission shaft 1
Set；Drive shaft 13 can rotate in the presence of driving source；Driving source can be electromagnet or cylinder isoline driving dress
Put；
Driving cam 2 is fixedly installed on power transmission shaft 1；Formed with the first cam surface 2a and the second cam in driving cam 2
Face 2b；
Trimming driving cam crank assemblies 3 are fixedly installed in drive shaft 13；One end of drive shaft 13 is provided with compression bullet
Spring 4；When drive shaft 13 while being rotated by, can make compression spring 4 store elastic force potential energy in driving source；
Roller 3a, return pin 3b and sliding block 3c are provided with trimming driving cam crank assemblies 3；
The roller 3a of trimming driving cam crank assemblies 3 is corresponding with the first cam surface 2a of driving cam 2；Trimming state
Under, roller 3a is rolled on the first cam surface 2a；The of the return pin 3b of trimming driving cam crank assemblies 3 and driving cam 2
Two cam surface 2b are corresponding；When trimming is completed, the second cam surface 2b and return pin 3b is touched, and can make trimming driving cam component
3 forced resettings.
Thread cutting mechanism includes trimming drive shaft 5, and trimming drive shaft 5 be arranged in parallel with drive shaft 13；Trimming drive shaft 5 passes through
Axle sleeve, which coordinates, to be arranged in casing 100；The sliding block 3c of trimming driving cam crank assemblies 3 and the open slot phase of trimming drive shaft 5
Coordinate, trimming driving cam crank assemblies 3 are fixedly connected with trimming drive shaft 5 by sliding block 3c；Trimming driving cam crank assemblies 3
Rotation trimming drive shaft 5 can be driven to swing；
As shown in figure 4, trimming drive shaft 5 is fixedly connected with one end of trimming crank 7；Trimming crank 7 can drive in trimming
Swung under the drive of axle 5 around the end；
The stage casing of trimming crank 7 offers the first connecting hole and the second connecting hole；
Trimming crank 7 is by being arranged in one end of the mode connects for screw driving knife connecting rod 10 of the first connecting hole, driving knife connecting rod
10 other end is connected with driving knife group 11；Driving knife 11a is provided with driving knife group 11；
Trimming crank 7 is by being arranged in the drive end of the mode connects for screw pair moving knife swing rod 8 of the second connecting hole；Secondary moving knife swing rod
8 driven end is connected by axial screw with one end of secondary moving knife connecting rod -9, and the other end auxiliary connection of secondary moving knife connecting rod 9 moves
Knife group 12；Secondary moving knife 12a is provided with secondary movable cutter set 12；
The middle part of secondary moving knife swing rod 8 is sheathed in trimming drive shaft 5；
Knife rest torsion spring 6 is housed in trimming drive shaft 5；One end connection trimming crank 7 of knife rest torsion spring 6, knife rest torsion spring 6 it is another
One end connection trimming drive shaft 5, knife rest torsion spring 6 resets for thread trimmer group.
Three holes are offered on secondary moving knife swing rod 8, are opened in the drive end of secondary moving knife swing rod 8, secondary moving knife swing rod 8 respectively
The middle part of driven end and secondary moving knife swing rod 8, the hole for being opened in one end are fixedly connected with trimming crank 7 by screw, are opened in another
The hole at end is be hinged by axial screw and secondary moving knife connecting rod 9, is opened in the borehole jack in stage casing in trimming drive shaft 5；Three holes into
Angular distribution；
Coordinate between secondary moving knife swing rod 8 and trimming drive shaft 5 for gap；
Operation principle of the present utility model is as follows：
Under original state, the roller 3a of trimming driving cam crank assemblies 3 is in the first cam surface 2a of driving cam 2
Stagger state；
When drive shaft 13 rotates in the presence of driving source, trimming driving cam crank assemblies 3 and roller thereon are driven
3a is rotated, and the ball 3a of trimming driving cam crank assemblies 3 is in contact with the first cam surface 2a of driving cam 2, is made simultaneously
Compression spring 4 is in compressive state；
Drive shaft 13 is rotated further, and roller 3a is rolled on the first cam surface 2a of driving cam 2, drives driving cam
2 rotate, so that power transmission shaft 1 rotates；The rotation of power transmission shaft 1 drives the second cam surface 2b synchronous axial systems, until driving cam 2
Second cam surface 2b is in contact with the return pin 3b on trimming driving cam component 3；
At the same time, the rotation of trimming driving cam crank assemblies 3 drives trimming drive shaft 5 to rotate, trimming drive shaft 5
Rotate and drive trimming crank 7 to swing；The driving knife connecting rod 10 that swings by of trimming crank 7 drives driving knife group 11 to rotate forward；
At the same time, trimming crank 7 swing by secondary moving knife swing rod 8 and secondary moving knife connecting rod 9 drives secondary movable cutter set 12 to rotate backward；By
In driving knife group 11 with the rotation direction of secondary movable cutter set 12 on the contrary, making driving knife 11a be engaged with secondary moving knife 12a, so as to complete to cut
Line acts；
After driving source disconnects, trimming crank 7 resets in the presence of knife rest torsion spring 6, makes driving knife 11a and secondary moving knife 12a
Reset；At the same time, compression spring 4 resets drive shaft 13 and trimming driving cam component 3.
Although embodiment of the present utility model is hereinbefore described in detail, come for those skilled in the art
Say it is readily apparent that various modifications and variations can be carried out to these embodiments.However, it is understood that this modification and change
Change is belonged within the scope of the utility model and spirit described in claims.Moreover, described herein practicality is new
Type can have other embodiments, and can be practiced or carried out in several ways.
Claims (9)
1. driving and the thread cutting mechanism of a kind of sewing machine, it is characterised in that：Including drive mechanism and thread cutting mechanism；
The drive mechanism includes power transmission shaft（1）And drive shaft（13）, power transmission shaft（1）On be fixedly installed driving cam（2）, drive
Moving cam（2）On formed with the first cam surface（2a）With the second cam surface（2b）；Drive shaft（13）On be fixedly installed trimming drive
Moving cam crank assemblies（3）, trimming driving cam crank assemblies（3）On be provided with roller（3a）, return pin（3b）And sliding block
（3c）；Trimming driving cam crank assemblies（3）Roller（3a）With driving cam（2）The first cam surface（2a）It is corresponding；Cut
Under wire state, drive shaft（13）Rotated in the presence of driving source, trimming driving cam crank assemblies can be driven（3）And thereon
Roller（3a）Rotate, make roller（3a）In the first cam surface（2a）Upper rolling, so as to drive power transmission shaft（1）Rotate；Trimming drives
Moving cam crank assemblies（3）Return pin（3b）With driving cam（2）The second cam surface（2b）It is corresponding；When trimming is completed,
Second cam surface（2b）With return pin（3b）Touching, can make trimming driving cam component（3）Forced resetting；
The thread cutting mechanism includes trimming drive shaft（5）, trimming drive shaft（5）It is fixedly connected with trimming driving cam crank assemblies
（3）；Trimming driving cam crank assemblies（3）Rotation can drive trimming drive shaft（5）Rotate；Trimming drive shaft（5）It is fixed
Connect trimming crank（7）One end；Trimming crank（7）Can be in trimming drive shaft（5）Drive under around the end swing；Trimming is bent
Handle（7）Stage casing offer the first connecting hole and the second connecting hole；Trimming crank（7）Driving knife is connected by the first connecting hole to connect
Bar（10）One end, driving knife connecting rod（10）The other end and driving knife group（11）It is connected；Driving knife group（11）On be provided with
Driving knife（11a）；Trimming crank（7）Pass through the second connecting hole auxiliary connection moving knife swing rod（8）Drive end；Secondary moving knife swing rod（8）
Driven end and secondary moving knife connecting rod（9）One end be connected, secondary moving knife connecting rod（9）Other end auxiliary connection movable cutter set（12）；It is secondary
Movable cutter set（12）On be provided with secondary moving knife（12a）；Secondary moving knife swing rod（8）Middle part be sheathed on trimming drive shaft（5）On；
Trimming driving cam crank assemblies（3）Rotation can drive trimming drive shaft（5）Rotate, trimming drive shaft（5）Turn
It is dynamic to drive trimming crank（7）Swing；Trimming crank（7）Swing by driving knife connecting rod（10）Drive driving knife group（11）It is positive
Rotate；At the same time, trimming crank（7）Swing by secondary moving knife swing rod（8）And secondary moving knife connecting rod（9）Drive secondary movable cutter set
（12）Rotate backward, make driving knife（11a）With secondary moving knife（12a）Occlusion, so as to complete trimming action.
2. driving and the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The drive shaft（13）One
End is provided with compression spring（4）；Work as drive shaft（13）In driving source while being rotated by, compression spring can be made（4）
Store elastic force potential energy, compression spring after driving source disconnects（4）Drive shaft can be made（13）Reset.
3. driving and the thread cutting mechanism of sewing machine according to claim 1 or 2, it is characterised in that：The trimming drive shaft
（5）It is upper that knife rest torsion spring is housed（6）；Knife rest torsion spring（6）One end connection trimming crank（7）, knife rest torsion spring（6）The other end connection
Trimming drive shaft（5）, knife rest torsion spring（6）Resetted for thread trimmer group.
4. driving and the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The secondary moving knife swing rod（8）
On offer three holes, be opened in secondary moving knife swing rod respectively（8）Drive end, secondary moving knife swing rod（8）Driven end and secondary moving knife
Swing rod（8）Middle part, three holes are into angular distribution.
5. driving and the thread cutting mechanism of the sewing machine according to claim 1 or 4, it is characterised in that：The secondary moving knife swing rod
（8）With trimming drive shaft（5）Between for gap coordinate.
6. driving and the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The trimming drive shaft（5）
Open slot and the trimming driving cam crank assemblies（3）Sliding block（3c）It is engaged, trimming driving cam crank assemblies（3）
Pass through sliding block（3c）It is fixedly connected with trimming drive shaft（5）.
7. driving and the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The drive shaft（13）With biography
Moving axis（1）It is arranged in parallel.
8. driving and the thread cutting mechanism of the sewing machine according to claim 1 or 7, it is characterised in that：The trimming drive shaft
（5）With drive shaft（13）It is arranged in parallel.
9. driving and the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that：The driving source is electromagnet
Or cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720696184.9U CN206783952U (en) | 2017-06-15 | 2017-06-15 | The driving of sewing machine and thread cutting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720696184.9U CN206783952U (en) | 2017-06-15 | 2017-06-15 | The driving of sewing machine and thread cutting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206783952U true CN206783952U (en) | 2017-12-22 |
Family
ID=60717378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720696184.9U Active CN206783952U (en) | 2017-06-15 | 2017-06-15 | The driving of sewing machine and thread cutting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206783952U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022856A (en) * | 2017-06-15 | 2017-08-08 | 浙江美机缝纫机有限公司 | The driving of sewing machine and thread cutting mechanism |
-
2017
- 2017-06-15 CN CN201720696184.9U patent/CN206783952U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022856A (en) * | 2017-06-15 | 2017-08-08 | 浙江美机缝纫机有限公司 | The driving of sewing machine and thread cutting mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 317502 Zhongxiang Industrial Zone, 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. |
|
| CP01 | Change in the name or title of a patent holder |