CN206783954U - The thread cutting mechanism of sewing machine - Google Patents

The thread cutting mechanism of sewing machine Download PDF

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Publication number
CN206783954U
CN206783954U CN201720697184.0U CN201720697184U CN206783954U CN 206783954 U CN206783954 U CN 206783954U CN 201720697184 U CN201720697184 U CN 201720697184U CN 206783954 U CN206783954 U CN 206783954U
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China
Prior art keywords
trimming
moving knife
knife
secondary moving
driving
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Active
Application number
CN201720697184.0U
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Chinese (zh)
Inventor
何清
范有金
叶海波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meiji Technology Group Co.,Ltd.
Original Assignee
Zhejiang Maqi Sewing Machine Co Ltd
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Publication date
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Priority to CN201720697184.0U priority Critical patent/CN206783954U/en
Application granted granted Critical
Publication of CN206783954U publication Critical patent/CN206783954U/en
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Abstract

The utility model 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 are 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 and the secondary movable cutter set of secondary moving knife connecting rod are hinged;Secondary moving knife is provided with secondary movable cutter set.The utility model come the linkage of drivening rod mechanism, so as to realize being engaged for driving knife and secondary moving knife, reaches the purpose of trimming by the swing of trimming drive shaft.

Description

The thread cutting mechanism of sewing machine
Technical field
It the utility model is related 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 is driven 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 Mouth, 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 the position of moving knife and stationary knife blade overlaying and articulation also to have certain distance with 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 Add the process of artificial trimming the end of a thread, the end of a thread length shakiness rule on eedle can cause sewing next time bad stitching occur, influence Quality of sewing.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of thread cutting mechanism of sewing machine, and it can be simpler Single, quick and high reliability solution problem above.
In order to solve the above technical problems, the technical solution of the thread cutting mechanism of the utility model sewing machine is:
Including trimming drive shaft 1, trimming drive shaft 1 is fixedly connected with one end of trimming crank 3;Trimming crank 3 can cut Swung under the drive of line drive shaft 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, the other end and the phase of driving knife group 7 of driving knife connecting rod 6 by the first connecting hole Connection;Driving knife 7a is provided with driving knife group 7;The active that trimming crank 3 passes through the second connecting hole auxiliary connection moving knife swing rod 4 End;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 moving knife of secondary moving knife connecting rod 5 Group 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 is bent One end of handle 3 and driving knife connecting rod 6 is hinged, and the other end and driving knife group 7 of driving knife connecting rod 6 are be hinged;Set in driving knife group 7 There is 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 Crank 3, one end of the other end of secondary moving knife swing rod 4 and secondary moving knife connecting rod 5 are hinged, the other end and the secondary moving knife of secondary moving knife connecting rod 5 Group 8 is be hinged;Secondary moving knife 8a is provided with secondary movable cutter set 8;The trimming drive shaft 1 can be rotated by driving source, band Dynamic trimming 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, make driving knife 7a with Secondary moving knife 8a occlusions, complete 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 be around the center rotating of axle sleeve 9.
The trimming crank 3 connects return spring 2.
Three holes are offered on the secondary moving knife swing rod 4, are opened in drive end, the secondary moving knife pendulum of secondary moving knife swing rod 4 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 utility model can reach has the technical effect that:
The utility model is swung come the linkage of drivening rod mechanism by trimming drive shaft, so as to realize driving knife and pair The occlusion of moving knife, reach the purpose of trimming.
The utility model has simple and compact for structure, biting point stabilization, and cutting position makes to have cut setting in the underface of eedle The advantages that the end of a thread of line is shorter.
The utility model can be precisely controlled trimming position, and trimming the end of a thread is short, without manually subtracting the end of a thread so as to reduce 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 scheme of installation of the thread cutting mechanism of the utility model sewing machine in sewing machine case;
Fig. 2 is schematic perspective view of the present utility model;
Fig. 3 is the schematic perspective view of linkage of the present utility model;
Fig. 4 is the decomposer schematic diagram of linkage of the present utility model.
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
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." comprising " used herein etc. is similar The element that word means to occur before the word either cover the element for appearing in the word presented hereinafter or object and its wait by object Together, other elements or object are not excluded for.
As shown in Figures 1 to 4, the thread cutting mechanism of the utility model sewing machine, including trimming drive shaft 1, trimming drive shaft 1 In casing 100;Trimming drive shaft 1 is fixedly connected with one end of trimming crank 3;Trimming crank 3 can be in trimming drive shaft 1 Drive under around the end swing;
The stage casing of trimming crank 3 offers the first connecting hole and the second connecting hole;
Trimming crank 3 is 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 The other end be connected with driving knife group 7;
Trimming crank 3 is by being arranged in the drive end of the mode connects for screw pair moving knife swing rod 4 of 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 moving knife of secondary moving knife connecting rod 5 Group 8;
The middle part of secondary moving knife swing rod 4 is sheathed in trimming drive shaft 1, between being between secondary moving knife swing rod 4 and trimming drive shaft 1 Gap coordinates;
Three holes are offered on secondary moving knife swing rod 4, are opened in the drive end of secondary moving knife swing rod 4, secondary moving knife swing rod 4 respectively The middle part of driven end and 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 of return spring 2 connects Trimming drive shaft 1 is connect, 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 be around the center rotating of axle sleeve 9.
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 utility model is as follows;
Trimming drive shaft 1 rotates forward under the driving of driving source, drives trimming crank 3 to swing;The swing of trimming crank 3 Driving knife group 7 is driven to be rotated forward around the centre of gyration of axle sleeve 9 by driving knife connecting rod 6;At the same time, the pendulum of trimming crank 3 It is dynamic to drive secondary movable cutter set 8 to be rotated backward around the centre of gyration of axle sleeve 9 by secondary moving knife swing rod 4 and secondary moving knife connecting rod 5;Due to actively With the rotation direction of secondary movable cutter set 8 on the contrary, making driving knife 7a be engaged with secondary moving knife 8a, completion trimming acts knife group 7;
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 as to complete the process of a trimming.
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 (6)

  1. A kind of 1. 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)It can be 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, complete trimming action.
  2. 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. 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. 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, be opened in secondary moving knife swing rod 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. 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. 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.
CN201720697184.0U 2017-06-15 2017-06-15 The thread cutting mechanism of sewing machine Active CN206783954U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720697184.0U CN206783954U (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
CN201720697184.0U CN206783954U (en) 2017-06-15 2017-06-15 The thread cutting mechanism of sewing machine

Publications (1)

Publication Number Publication Date
CN206783954U true CN206783954U (en) 2017-12-22

Family

ID=60717430

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720697184.0U Active CN206783954U (en) 2017-06-15 2017-06-15 The thread cutting mechanism of sewing machine

Country Status (1)

Country Link
CN (1) CN206783954U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107034597A (en) * 2017-06-15 2017-08-11 浙江美机缝纫机有限公司 The thread cutting mechanism of sewing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107034597A (en) * 2017-06-15 2017-08-11 浙江美机缝纫机有限公司 The thread cutting mechanism of sewing machine

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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