CN208346425U - A kind of thread cutting mechanism of sewing machine - Google Patents
A kind of thread cutting mechanism of sewing machine Download PDFInfo
- Publication number
- CN208346425U CN208346425U CN201820837195.9U CN201820837195U CN208346425U CN 208346425 U CN208346425 U CN 208346425U CN 201820837195 U CN201820837195 U CN 201820837195U CN 208346425 U CN208346425 U CN 208346425U
- Authority
- CN
- China
- Prior art keywords
- cutting mechanism
- thread cutting
- sewing machine
- knife
- pedestal
- 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
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
The utility model provides a kind of thread cutting mechanism of sewing machine, belongs to technical field of sewing machines.It solves the problems such as existing thread cutting mechanism job insecurity.The thread cutting mechanism of this sewing machine, sewing machine includes pedestal, lower axle is provided in pedestal, it is located above lower axle on pedestal and is fixedly connected with needle plate, thread cutting mechanism includes the moving knife and stationary knife that cutting edge is oppositely arranged, movable knife rack is arranged in lower axle, moving knife is fixed on movable knife rack, drive shaft is additionally provided in pedestal, it is fixedly connected with driving crank in drive shaft, cutter shaft connecting rod is hinged on movable knife rack, driving crank is hinged with cutter shaft connecting rod, stationary knife is removably attached on the lower surface of needle plate, and gasket is provided between needle plate and stationary knife.This thread cutting mechanism adjustable, steady operation and other merits with cutter magnitude of interference.
Description
Technical field
The utility model belongs to technical field of sewing machines, is related to a kind of thread cutting mechanism of sewing machine.
Background technique
Sewing machine is the machine for being sutured sewing by suture, including needle bar mechanism, Yarn taking-up mechanism, feeding mechanism, hooking
Mechanism, hold-down mechanism, bobbin winder device and lubricating arrangement etc..In order to realize the automatic shearing function of sewing machine, also set on sewing machine
It is equipped with thread cutting mechanism.
Chinese patent literature data disclose propose a kind of sewing machine thread cutting mechanism [application number: 201510599479.X,
Publication number: 105133215A]: sewing machine includes bottom plate and the casing that is connected on bottom plate, and casing is equipped with eedle, is turned in bottom plate
Dynamic to be connected with lower axle and drive shaft, lower axle and drive shaft are parallel；Thread cutting mechanism includes moving knife, stationary knife and discoid moving knife
Frame, movable knife rack are fixed on the end of lower axle, and moving knife is connected on movable knife rack, and moving knife is located at the side of lower axle, and movable knife rack is in lower axle
The other side be hinged with cutter shaft connecting rod, the end of drive shaft is fixed with driving crank, the free end of cutter shaft connecting rod and driving crank
It is hinged, drive shaft and movable knife rack are sequentially connected and are able to drive movable knife rack rotation, and stationary knife is slidably connected in bottom plate, and stationary knife
Cutting edge it is opposite with the cutting edge of moving knife, eedle can extend into bottom plate and between moving knife and stationary knife.
In above-mentioned thread cutting mechanism, stationary knife is slidably connected in bottom plate, and drive mechanism is provided between stationary knife and movable knife rack,
When moving knife is close to stationary knife, drive mechanism drives stationary knife close to moving knife, so that suture be cut.But stationary knife and moving knife
Magnitude of interference is unadjustable, be easy to cause trimming to fail when the magnitude of interference of stationary knife and moving knife is improper, makes thread cutting mechanism work not
Stablize.
Summary of the invention
The purpose of this utility model is in view of the above-mentioned problems existing in the prior art, to propose a kind of thread trimmer of sewing machine
The technical issues of structure, solution is the stability for how improving the work of thread cutting mechanism.
The purpose of this utility model can be realized by the following technical scheme:
A kind of thread cutting mechanism of sewing machine, sewing machine include pedestal, and lower axle is provided in the pedestal, and the pedestal is upper
Needle plate is fixedly connected with above lower axle, thread cutting mechanism includes the moving knife and stationary knife that cutting edge is oppositely arranged, and is covered in the lower axle
Equipped with movable knife rack, the moving knife is fixed on movable knife rack, and drive shaft, fixed company in the drive shaft are additionally provided in the pedestal
It is connected to driving crank, cutter shaft connecting rod is hinged on the movable knife rack, the driving crank is hinged with cutter shaft connecting rod, and feature exists
In the stationary knife is removably attached on the lower surface of needle plate, is provided with gasket between the needle plate and stationary knife.
Drive shaft turns drive movable knife rack rotation by driving crank and cutter shaft connecting rod, thus rotate moving knife around lower axle,
Moving knife intersects with stationary knife blade cuts suture, and suture scissors drive shaft of having no progeny rotates backward and resets moving knife.It is different by replacement
Magnitude of interference between the adjustable stationary knife of the gasket of thickness and moving knife improves thread cutting mechanism to guarantee going on smoothly for trimming
The stability of work.
In the thread cutting mechanism of above-mentioned sewing machine, motor, the shaft and driving of the motor are fixed on the pedestal
Axis connection.The control precision of motor is high, is conducive to the stability for improving thread cutting mechanism work.
In the thread cutting mechanism of above-mentioned sewing machine, fluted, the gasket and fixed is set on the lower surface of the needle plate
Knife is embedded into groove.
The positioning for facilitating gasket and stationary knife by groove keeps stationary knife and gasket easy for installation；Make the position of stationary knife quasi- simultaneously
Really, make the trimming position of stationary knife and moving knife accurate, be conducive to the stabilization of thread cutting mechanism work.
In the thread cutting mechanism of above-mentioned sewing machine, the stationary knife is fixed on needle plate by fixing screws, the fixation
The bar portion of screw is threadedly coupled after sequentially passing through stationary knife and gasket from the bottom up with needle plate.By the fixed stationary knife of fixing screws, make
Stationary knife and needle plate are convenient for disassembly and assembly.
In the thread cutting mechanism of above-mentioned sewing machine, it is provided with scotch on the driving crank, is had on the pedestal
For scotch against motion-stopping surface, drive the angle of crank and cutter shaft connecting rod to be less than when scotch is resisted against on motion-stopping surface
180°。
In thread cutting mechanism motion process, drives the scotch on crank to be resisted against rear drive shaft on the motion-stopping surface of pedestal and stop
Rotation drives the angle of crank and cutter shaft connecting rod less than 180 ° at this time, and crank and cutter shaft connecting rod is driven not to stop on dead point,
Thread cutting mechanism can normally start after stopping, and improve the stability of thread cutting mechanism work.
In the thread cutting mechanism of above-mentioned sewing machine, the driving crank includes shank body, is provided in the middle part of the shank body
Opening up fixation hole, the scotch are inserted into fixation hole and fixed, the outer end stretching fixation hole of the scotch.
The pump housing and scotch split settings can be such that shank body and scotch is made of different materials, and shank body is using gold
Belong to material to be made, scotch is made of rubber or plastics, can generate buffer function.By fixation hole fixed stop block,
Keep scotch easy for installation.The opening up of fixation hole can prevent the scotch loosened from dropping out out of fixation hole.
In the thread cutting mechanism of above-mentioned sewing machine, the fixation hole is blind hole, and the inner end of the scotch is resisted against solid
Determine to be provided with step on the bottom surface in hole or on the hole wall of the fixation hole, the inner end of the scotch is resisted against on step.This
Sample can prevent scotch from dropping out from the lower end of fixation hole, make thread cutting mechanism the operation is stable.
In the thread cutting mechanism of above-mentioned sewing machine, moving knife seat is further fixed on the pedestal, the moving knife cover for seat is located at
In lower axle, there is the mounting portion concentric with lower axle on the moving knife seat, be located at mounting portion both ends on the moving knife seat and be respectively set
There are shoulder block and pressing plate, the movable knife rack is set on mounting portion and the both ends end face of movable knife rack sticks on shoulder block and pressing plate respectively
On.
Shoulder block is integrally formed on moving knife seat, and pressing plate is fixed on the end face of moving knife seat by mounting screw.Pass through moving knife
Seat rotate movable knife rack axial restraint can axially again, make moving knife motion stabilization, advantageously ensure that the stabilization of thread cutting mechanism work
Property.
In the thread cutting mechanism of above-mentioned sewing machine, the convex block of protrusion, the knife are provided on the outer of the movable knife rack
Axis connecting rod is hinged on convex block, is located at below convex block on the outer of the movable knife rack and is provided with recessing groove, the driving crank
Upper and hinged cutter shaft connecting rod end is able to enter in recessing groove.
The setting of recessing groove, which can prevent driving crank to be resisted against on movable knife rack, keeps thread cutting mechanism stuck, makes thread cutting mechanism work
Work is stablized.The setting of convex block reduces cutter shaft connecting rod and touches movable knife rack in the process of movement, keeps moving knife movement smooth.
Compared with prior art, the utility model has the advantage that
It is removably secured stationary knife on needle plate, gasket is set between stationary knife and needle plate, guarantees that trimming smoothly carries out, mentions
The stability of high thread cutting mechanism work.By motor driven drive shaft, stablize trimming accurate.Stop is set on driving crank
Block, on pedestal be arranged for scotch against motion-stopping surface, improve thread cutting mechanism work stability.Scotch is fixed on fixation
In hole, the opening up setting of fixation hole sets blind hole or stepped hole for fixation hole, scotch is made to be not easy to drop out, makes to cut
Line mechanism the operation is stable.By moving knife seat and the fixed movable knife rack of baffle, it circumferentially rotate movable knife rack axial restraint can again, moving knife
Motion stabilization.Convex block and recessing groove are set on movable knife rack, guarantee the smooth operation of thread cutting mechanism.
Detailed description of the invention
Fig. 1 is perspective view when this thread cutting mechanism is mounted on the base；
Fig. 2 is the perspective view of this thread cutting mechanism；
Fig. 3 is the exploded view of this thread cutting mechanism.
In figure, 1, pedestal；1a, motion-stopping surface；2, lower axle；3, needle plate；3a, groove；4, moving knife；5, stationary knife；6, movable knife rack；
6a, convex block；6b, recessing groove；7, drive shaft；8, crank is driven；8a, shank body；8a1, fixation hole；8b, scotch；9, cutter shaft connects
Bar；10, gasket；11, fixing screws；12, moving knife seat；12a, mounting portion；12b, shoulder block；13, pressing plate；14, motor.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
Embodiment one
As shown in Figure 1-Figure 3, a kind of thread cutting mechanism of sewing machine, sewing machine include pedestal 1, are provided with lower axle in pedestal 1
2, the top that lower axle 2 is located on pedestal 1 is fixedly connected with needle plate 3, and pin hole is provided on needle plate 3, is arranged on the lower surface of needle plate 3
Fluted 3a.
Thread cutting mechanism is fixed in pedestal 1, and thread cutting mechanism includes the moving knife 4 and stationary knife 5 that cutting edge is oppositely arranged.On pedestal 1
It is further fixed on moving knife seat 12, moving knife seat 12 is set in lower axle 2, there is the mounting portion 12a concentric with lower axle 2 on moving knife seat 12,
It is located at the both ends mounting portion 12a on moving knife seat 12 and is respectively arranged with shoulder block 12b and pressing plate 13, shoulder block 12b is integrally formed in moving knife seat
On 12, pressing plate 13 is fixed on the end face of moving knife seat 12 by mounting screw.Moving knife in the form of annular discs is arranged on mounting portion 12a
Frame 6, the both ends of the surface of movable knife rack 6 are sticked on respectively on shoulder block 12b and pressing plate 13.
Drive shaft 7 is additionally provided in pedestal 1, one end of drive shaft 7 is connected with motor 14, and the other end of drive shaft 7 is fixed
It is connected with driving crank 8.The shell of motor 14 is fixed on pedestal 1, and the rotation of motor 14 is connect with drive shaft 7.Drive crank 8
Including shank body 8a, it is provided with opening up fixation hole 8a1 in the middle part of shank body 8a, is fixed with scotch 8b in fixation hole 8a1, only
Fixation hole 8a1 is stretched out in the outer end of motion block 8b.Scotch 8b is inserted into fixation hole 8a1 and fixes, and fixation hole 8a1 is blind hole, only
The inner end of motion block 8b is resisted against on the bottom surface of fixation hole 8a1；Or step, i.e. fixation hole are provided on the hole wall of fixation hole 8a1
8a1 is stepped hole, and the inner end of scotch 8b is resisted against on step.On pedestal 1 have for scotch 8b against motion-stopping surface 1a, when
Drive the angle of crank 8 and cutter shaft connecting rod 9 less than 180 ° when scotch 8b is resisted against on motion-stopping surface 1a, it is generally preferable to be set as
Angle between 30 ° -150 °.Moving knife 4 is fixed on the outer of movable knife rack 6, and the convex of protrusion is additionally provided on the outer of movable knife rack 6
It is hinged with cutter shaft connecting rod 9 on block 6a, convex block 6a, is located at below convex block 6a on the outer of movable knife rack 6 and is provided with recessing groove 6b, drive
The end of dynamic 8 shank body 8a of crank is hinged with cutter shaft connecting rod 9 and is able to enter in recessing groove 6b.
Stationary knife 5 is removably attached on the lower surface of needle plate 3, and gasket 10, gasket are provided between needle plate 3 and stationary knife 5
10 and stationary knife 5 be embedded into groove 3a.Stationary knife 5 is fixed on needle plate 3 by fixing screws 11, and the bar portion of fixing screws 11 is under
It is threadedly coupled after up sequentially passing through stationary knife 5 and gasket 10 with needle plate 3.Or the bar portion of fixing screws 11 is successively worn from top to bottom
It is connect after crossing needle plate 3, gasket 10 and stationary knife 5 with nut thread.
Drive shaft 7 rotates when motor 14 works, and the rotation of drive shaft 7 drives movable knife rack by driving crank 8 and cutter shaft connecting rod 9
6 rotations, so that moving knife 4 be made to rotate around lower axle 2, moving knife 4 intersects with 5 blade of stationary knife cuts suture, and suture scissors is had no progeny drive shaft 7
Rotating backward resets moving knife 4, waits trimming next time.By replacing the adjustable stationary knife 5 of gasket 10 of different-thickness and moving
Magnitude of interference between knife 4 improves the stability of thread cutting mechanism work to guarantee going on smoothly for trimming.Thread cutting mechanism movement
In the process, it drives the scotch 8b on crank 8 to be resisted against rear drive shaft 7 on the motion-stopping surface 1a of pedestal 1 to stop operating, drive at this time
The angle of crank 8 and cutter shaft connecting rod 9 drives crank 8 and cutter shaft connecting rod 9 not to stop on dead point, thread cutting mechanism less than 180 °
Trimming can normally start next time after stopping, improving the stability of thread cutting mechanism work.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (9)
1. a kind of thread cutting mechanism of sewing machine, sewing machine includes pedestal (1), is provided with lower axle (2) in the pedestal (1), described
It is located above lower axle (2) on pedestal (1) and is fixedly connected with needle plate (3), thread cutting mechanism includes the moving knife (4) that cutting edge is oppositely arranged
With stationary knife (5), it is arranged with movable knife rack (6) on the lower axle (2), the moving knife (4) is fixed on movable knife rack (6), the pedestal
(1) it is additionally provided with drive shaft (7) in, driving crank (8) is fixedly connected on the drive shaft (7), is cut with scissors on the movable knife rack (6)
It is connected to cutter shaft connecting rod (9), the driving crank (8) is hinged with cutter shaft connecting rod (9), which is characterized in that the stationary knife (5) is removable
It is fixed on unloading on the lower surface of needle plate (3), is provided with gasket (10) between the needle plate (3) and stationary knife (5).
2. the thread cutting mechanism of sewing machine according to claim 1, which is characterized in that be fixed with motor on the pedestal (1)
(14), the shaft of the motor (14) is connect with drive shaft (7).
3. the thread cutting mechanism of sewing machine according to claim 1, which is characterized in that set on the lower surface of the needle plate (3)
It is equipped with groove (3a), the gasket (10) and stationary knife (5) are embedded into groove (3a).
4. the thread cutting mechanism of sewing machine according to claim 3, which is characterized in that the stationary knife (5) passes through fixing screws
(11) it is fixed on needle plate (3), after the bar portion of the fixing screws (11) sequentially passes through stationary knife (5) and gasket (10) from the bottom up
It is threadedly coupled with needle plate (3).
5. the thread cutting mechanism of sewing machine according to claim 1 to 4, which is characterized in that on the driving crank (8)
Be provided with scotch (8b), on the pedestal (1) have for scotch (8b) against motion-stopping surface (1a), when scotch (8b) supports
Drive the angle of crank (8) and cutter shaft connecting rod (9) less than 180 ° when leaning against on motion-stopping surface (1a).
6. the thread cutting mechanism of sewing machine according to claim 5, which is characterized in that the driving crank (8) includes shank body
(8a) is provided with opening up fixation hole (8a1) in the middle part of the shank body (8a), and the scotch (8b) is inserted into fixation hole
In (8a1) and fixed, fixation hole (8a1) is stretched out in the outer end of the scotch (8b).
7. the thread cutting mechanism of sewing machine according to claim 6, which is characterized in that the fixation hole (8a1) is blind hole, institute
The inner end for stating scotch (8b) is resisted against on the bottom surface of fixation hole (8a1) or is provided on the hole wall of the fixation hole (8a1)
The inner end of step, the scotch (8b) is resisted against on step.
8. the thread cutting mechanism of sewing machine according to claim 1 to 4, which is characterized in that also solid on the pedestal (1)
Surely have moving knife seat (12), the moving knife seat (12) is set on lower axle (2), has on the moving knife seat (12) same with lower axle (2)
The mounting portion (12a) of the heart is located at the both ends mounting portion (12a) on the moving knife seat (12) and is respectively arranged with shoulder block (12b) and pressing plate
(13), the movable knife rack (6) is set on mounting portion (12a) and the both ends end face of movable knife rack (6) sticks on shoulder block (12b) respectively
On pressing plate (13).
9. the thread cutting mechanism of sewing machine according to claim 1 to 4, which is characterized in that outside the movable knife rack (6)
The convex block (6a) of protrusion is provided on edge, the cutter shaft connecting rod (9) is hinged on convex block (6a), the outer of the movable knife rack (6)
It is upper to be provided with recessing groove (6b) below convex block (6a), the end hinged with cutter shaft connecting rod (9) on driving crank (8)
It is able to enter in recessing groove (6b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820837195.9U CN208346425U (en) | 2018-05-31 | 2018-05-31 | A kind of thread cutting mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820837195.9U CN208346425U (en) | 2018-05-31 | 2018-05-31 | A kind of thread cutting mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208346425U true CN208346425U (en) | 2019-01-08 |
Family
ID=64891762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820837195.9U Active CN208346425U (en) | 2018-05-31 | 2018-05-31 | A kind of thread cutting mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208346425U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041723A (en) * | 2019-12-31 | 2020-04-21 | 浙江美机缝纫机有限公司 | Thread cutting mechanism of sewing machine |
| 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 |
-
2018
- 2018-05-31 CN CN201820837195.9U patent/CN208346425U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041723A (en) * | 2019-12-31 | 2020-04-21 | 浙江美机缝纫机有限公司 | Thread cutting mechanism of sewing machine |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208346425U (en) | A kind of thread cutting mechanism of sewing machine | |
| CN106319783B (en) | Cutter mechanism of sewing machine | |
| KR200486535Y1 (en) | Thread drawing blade for a sewing machine, thread cut-off assembly and sewing machine with a thread drawing blade of this type | |
| CN212611304U (en) | Sewing machine with automatic threading function | |
| JP4614114B2 (en) | Sewing machine with thread trimmer | |
| CN207091682U (en) | The thread cutting mechanism of sewing machine | |
| JP2008194409A (en) | Sewing machine with thread cutting device | |
| CN215757963U (en) | Thread hooking device of computerized embroidery machine | |
| CN112281327A (en) | Cloth hemming and cutting device and method for sewing machine and cutting mechanism | |
| CN218090077U (en) | Scissor mechanism and computerized embroidery machine | |
| CN211713370U (en) | Motor thread trimming mechanism of sewing machine | |
| CN207608745U (en) | A kind of trimming device of cloth bead cutter | |
| CN110117877A (en) | One kind going to Bird's Nest mechanism | |
| CN107268202A (en) | The thread cutting mechanism of sewing machine | |
| CN214186389U (en) | Automatic tool setting and broken tool detection mechanism | |
| CN111560714A (en) | Sewing machine with automatic threading function | |
| CN217600999U (en) | Motor-driven thread trimming mechanism of sewing machine | |
| CN213624694U (en) | Flat cutter thread trimming mechanism of quilter | |
| CN212955658U (en) | Remove bird's nest structure | |
| CN218951677U (en) | Needle bar adjusting mechanism of sewing machine | |
| CN219099518U (en) | Edge shearing device applied to computer roller car | |
| CN213172901U (en) | Guide and thread blowing structure in automatic threading device of sewing machine | |
| CN213142411U (en) | Thread drawing structure in automatic thread threading device of sewing machine | |
| CN107938189A (en) | It is a kind of that there is the hemming sewing machine of automatic cutoff | |
| CN216838504U (en) | Sewing equipment of improved thread trimming mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |