CN206279337U - A kind of thread cutting mechanism of sewing machine - Google Patents
A kind of thread cutting mechanism of sewing machine Download PDFInfo
- Publication number
- CN206279337U CN206279337U CN201621314629.4U CN201621314629U CN206279337U CN 206279337 U CN206279337 U CN 206279337U CN 201621314629 U CN201621314629 U CN 201621314629U CN 206279337 U CN206279337 U CN 206279337U
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- connecting rod
- movable knife
- knife rack
- cutting mechanism
- blade
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Abstract
The utility model provides a kind of thread cutting mechanism of sewing machine, belongs to sewing machine technique field.How it makes the overall compact problem of structure of thread cutting mechanism while the end of a thread raising trimming quality is shortened if being solved.This thread cutting mechanism includes connecting rod one, connecting rod two, movable knife rack one and movable knife rack two, there is blade one on movable knife rack one, there is blade two on movable knife rack two, the front end of connecting rod one is hinged on and drives on crank and formed the lower section that pin joint one and pin joint one are located at drive shaft, the rear end of connecting rod one is hinged on movable knife rack one, the front end of connecting rod two is also articulated to drive on crank and formed pin joint two and pin joint two is located at the top of drive shaft, the rear end of connecting rod two is hinged on movable knife rack two, blade one and blade two can be drawn close to eedle under the drive of connecting rod one and connecting rod two and carry out shear action respectively.This thread cutting mechanism can not only shorten the end of a thread, and cause that structure is compacter using two double moving knife designs for rotating.
Description
Technical field
The utility model belongs to sewing machine technique field, is related to a kind of thread cutting mechanism of sewing machine.
Background technology
Sewing machine is to use one or more sewing thread, and one or more stitching is formed on sewing, stitches one or more layers
The machine that material interweaves or unites by a seam, generally comprises domestic sewing machine and industrial sewing machine.At present, advanced industrial sewing machine is all
With automatic thread trimming device, to reach laborsaving, power saving, less manpower, the purpose of the production efficiency of factory is improved.General cutting facility
With moving knife and stationary knife, when sewing finishing, move moving knife by drive device tangent with stationary knife, automatically will be from processing cloth
What is extended reaches the standard grade and offline cutting.
Such as Chinese patent【Application number：201010602851.5；Application publication number：CN102041646A】Disclose a kind of seam
Thread the cutting facility of machine, including base, the stationary knife component on base and moving knife component are mutually connected with moving knife component
Transmission mechanism, drive the drive mechanism and controlling organization of described transmission mechanism action, moving knife component include moving knife knife rest,
Moving knife on described moving knife knife rest, described stationary knife component is including stationary knife knife rest, installed in described stationary knife knife rest
On stationary knife, described moving knife and stationary knife can do the underface of relative shearing motion and the eedle positioned at sewing machine.Should
Cutting facility completes the automatic cutting to suture with stationary knife and moving knife.
But there is following defect in above-mentioned cutting facility：Because stationary knife is fixed on casing, apart from eedle center farther out, because
, in trimming, trimming position also can be retained in the end of a thread mistake on cloth accordingly away from eedle center, after so causing trimming for this
It is long, it is necessary to specially be pruned to the end of a thread again with scissors after the completion of sewing, sewing operation is increased, while also having aggravated behaviour
The work load of work person.
The content of the invention
The purpose of this utility model is directed to existing technology and there is above mentioned problem, it is proposed that a kind of thread trimmer of sewing machine
Structure, the technical problem that the utility model is solved is how to make the structure of thread cutting mechanism while the end of a thread raising trimming quality is shortened
It is compacter.
The purpose of this utility model can be realized by following technical proposal：A kind of thread cutting mechanism of sewing machine, the seam
Machine of threading includes base plate, eedle and the lower axle and drive shaft that are rotatably connected on base plate, it is characterised in that the thread cutting mechanism includes
Connecting rod one, connecting rod two, be connected driving crank on the driving shaft and the movable knife rack one and movable knife rack that are rotatably connected in lower axle
Two, there is blade one on the movable knife rack one, there is blade two on the movable knife rack two, the blade one and blade two are located at machine
The both sides of pin, the front end of the connecting rod one is hinged on and drives on crank and formed pin joint one and pin joint one is located at drive shaft
Lower section, the rear end of the connecting rod one is hinged on movable knife rack one, and the front end of the connecting rod two is also articulated to drive on crank and shape
The top of drive shaft is located at into pin joint two and pin joint two, the rear end of the connecting rod two is hinged on movable knife rack two, the knife
Sword one and blade two can be drawn close to eedle under the drive of connecting rod one and connecting rod two and carry out shear action respectively.
Prior art is different from, the operation principle of this thread cutting mechanism is can be relative by designing two in the both sides of eedle
The moving knife of rotation, two moving knife can realize trimming near the position of eedle syringe needle, so that the end of a thread can be at utmost
Shortening, improve trimming quality；Specifically, when trimming is needed, drive shaft drives and drives crank to rotate, and movable knife rack one exists
Under the drive of connecting rod one with blade one to eedle direction rotate, movable knife rack two under the drive of connecting rod two with blade two to
Rotated to eedle, until blade one and blade two are mutually rotated draw close and completing shear action near the position of syringe needle, so that
Shorten the end of a thread；Simultaneously as movable knife rack one and movable knife rack two are arranged in lower axle by the way of connection is rotated, Liang Zhesuo
The installing space for needing is small, and both rotational motions, and the operating space needed for carrying out shear action is also smaller, and moving knife
Frame one and movable knife rack two are by a rod hinge connection on same driving crank so that whole thread cutting mechanism parts are few and institute
The mounting arrangements space for needing is small；Therefore, by above structure design, also cause to cut shortening while the end of a thread improves trimming quality
The structure of line mechanism is compacter.In addition, alternatively, the position relationship of pin joint one and pin joint two can be according to design need
Exchanged.
In the thread cutting mechanism of above-mentioned sewing machine, the driving crank includes the block-shaped body being connected on the driving shaft,
The upper end of the body has connecting seat, and the lower end of the body has the linking arm extended obliquely downward to lower axle side, institute
The front end for stating connecting rod one is hinged on formation pin joint one on the free end of linking arm, and the front end of the connecting rod two is hinged on connecting seat
Upper formation pin joint two.Crank is driven to pass through above structure design so that the position of pin joint one and pin joint two can obtain
Reasonable Arrangement, when driving crank to rotate clockwise, the power transmission of connecting rod one and connecting rod two is in opposite direction, so that the He of blade one
Blade two can occur opposite and completing shear action near the position of syringe needle, and then cause that the end of a thread shortens, and improve trimming
Quality；Meanwhile, drive crank to use above-mentioned design so that connecting rod one and connecting rod two can be articulated and connected with crank is driven, so that
Reduce the amount of parts of mechanism so that mechanism structure is more smart compact.
In the thread cutting mechanism of above-mentioned sewing machine, the movable knife rack one includes support body one annular in shape, the support body one
Side outer peripheral face on there is the installation portion one that axially extends, the blade one is connected or is integrally formed on installation portion one,
There is radially projecting connection ear one, the rear end of the connecting rod one is hinged on company on the opposite side outer peripheral face of the support body one
In lug portion one, the connection ear one is located in the same diametric(al) of support body one with installation portion one.By with upper knife edge one
With the Position Design of connection ear one so that movable knife rack one can form the structure similar to scissors, so that movable knife rack one
Can coupler link one smoothly the real position now close to syringe needle realizes that trimming is acted.
In the thread cutting mechanism of above-mentioned sewing machine, the movable knife rack two includes support body two annular in shape, the support body two
Side outer peripheral face on there is the installation portion two that axially extends, the blade two is connected or is integrally formed on installation portion two,
There is radially projecting connection ear two, the rear end of the connecting rod two is hinged on company on the opposite side outer peripheral face of the support body two
In lug portion two, the connection ear two is located in the same diametric(al) of support body two with installation portion two.By with upper knife edge two
With the Position Design of connection ear two so that movable knife rack two can form the structure similar to scissors, so that movable knife rack two
Can coupler link two smoothly the real position now close to syringe needle realizes that trimming is acted.
In the thread cutting mechanism of above-mentioned sewing machine, before being arranged on the outer peripheral face of the lower axle and being fixed with the lower axle of tubular
Set, the movable knife rack one and movable knife rack two are arranged side by side and are adjacent to the front end for being set in lower axle protheca, the movable knife rack one and moving knife
Frame two is rotated with lower axle protheca and is connected.Movable knife rack one and movable knife rack two use above-mentioned arrangement, are conducive to improving this thread cutting mechanism
Structural compactness.
In the thread cutting mechanism of above-mentioned sewing machine, the forward end of the lower axle protheca is fixed with knife rest pressure annular in shape
Plate, the lower axle protheca has convex shoulder near the periphery of front end, and annular mounting groove is formed between the convex shoulder and knife rest pressing plate,
The movable knife rack one and movable knife rack two are located in the annular mounting groove.The design of knife rest pressing plate and convex shoulder, simple structure is effective,
Can be good at realizing the axial limiting of movable knife rack one and movable knife rack two.
In the thread cutting mechanism of above-mentioned sewing machine, the free ending tool limited location block of the linking arm, on the limited block
Crash roll is fixed with, the crash roll is located at the lower section of base plate and can be resisted against on base plate.Can be kept away by designing crash roll
The hard collision of the dynamic crank of free drive and base plate, so that this thread cutting mechanism smoothly can stably carry out shear action, is conducive to
Improve the service life of this thread cutting mechanism.
Compared with prior art, the thread cutting mechanism of this sewing machine has advantages below：This thread cutting mechanism is by using two
The moving knife design of double rotations, and can just drive moving knife to realize that trimming is moved by a driving crank and two transmissions of connecting rod
Make, designed more than, the end of a thread can not only be shortened, improve trimming quality, and cause that the structure of this thread cutting mechanism is more stepped up
Gather.
Brief description of the drawings
Fig. 1 is the structural representation of this sewing machine.
Fig. 2 is the structural representation that this thread cutting mechanism is assemblied in drive shaft and lower axle.
Fig. 3 is the structural representation of this lower axle protheca.
Fig. 4 is the structural representation of this thread cutting mechanism.
Fig. 5 is the structural representation of this driving crank.
Fig. 6 is the structural representation of this movable knife rack one.
Fig. 7 is the structural representation of this movable knife rack two.
In figure, 1, base plate；2nd, eedle；3rd, lower axle；4th, drive shaft；5th, connecting rod one；6th, connecting rod two；7th, crank is driven；71st, originally
Body；72nd, connecting seat；73rd, linking arm；74th, limited block；8th, movable knife rack one；81st, support body one；82nd, installation portion one；83rd, ear is connected
One；9th, movable knife rack two；91st, support body two；92nd, installation portion two；93rd, ear two is connected；10th, blade one；11st, blade two；A, it is hinged
Point one；B, pin joint two；12nd, lower axle protheca；121st, convex shoulder；13rd, knife rest pressing plate；14th, annular mounting groove；15th, crash roll.
Specific embodiment
The following is specific embodiment of the utility model and with reference to accompanying drawing, further is made to the technical solution of the utility model
Description, but the utility model is not limited to these embodiments.
As shown in figure 1, this sewing machine includes base plate 1, eedle 2 and the lower axle 3 and drive shaft 4 that are rotatably connected on base plate 1.
As shown in Fig. 2 this thread cutting mechanism includes connecting rod 1, connecting rod 26, the driving crank 7 being connected in drive shaft 4 and the company of rotation
It is connected on movable knife rack 1 and movable knife rack 29 in lower axle 3.Specifically, it is arranged on the outer peripheral face of lower axle 3 and is fixed with tubular
Lower axle protheca 12, movable knife rack 1 and movable knife rack 29 are arranged side by side and are adjacent to the front end for being set in lower axle protheca 12, the He of movable knife rack 1
Movable knife rack 29 is rotated with lower axle protheca 12 and is connected.As shown in figure 3, the forward end of lower axle protheca 12 be fixed with it is annular in shape
Knife rest pressing plate 13, lower axle protheca 12 has convex shoulder 121 near the periphery of front end, is formed between convex shoulder 121 and knife rest pressing plate 13
Annular mounting groove 14, movable knife rack 1 and movable knife rack 29 are located in annular mounting groove 14.
As shown in figure 4, having blade 1 on movable knife rack 1, there is blade 2 11 on movable knife rack 29.The He of blade 1
Blade 2 11 is located at the both sides of eedle 2, and the cutting edge of blade 1 and blade 2 11 is relative and mutually staggers.The front end of connecting rod 1
It is hinged on driving crank 7 and is formed a of pin joint one and a of pin joint one is located at the lower section of drive shaft 4, the rear end hinge of connecting rod 1
It is connected on movable knife rack 1, the front end of connecting rod 26 is also articulated to drive on crank 7 and formed the b of pin joint two and pin joint two b
In the top of drive shaft 4, the rear end of connecting rod 26 is hinged on movable knife rack 29, and blade 1 and blade 2 11 can respectively even
Shear action is drawn close to eedle 2 and carried out under the drive of bar 1 and connecting rod 26.
More specifically, as shown in figure 5, drive the crank 7 to include being connected in block-shaped body 71 in drive shaft 4, body 71
Upper end has connecting seat 72, and the lower end of body 71 has the linking arm 73 extended obliquely downward to the side of lower axle 3, connecting rod 1
Front end is hinged on the formation a of pin joint one on the free end of linking arm 73, and the front end of connecting rod 26 is hinged on and hinge is formed on connecting seat 72
The b of contact two.The free end of linking arm 73 also has limited block 74, and crash roll 15 is fixed with limited block 74, and crash roll 15 is located at
The lower section of base plate 1 can be simultaneously resisted against on base plate 1.
As shown in fig. 6, movable knife rack 1 includes support body 1 annular in shape, there is edge on the side outer peripheral face of support body 1
Axially extending installation portion 1, blade 1 is connected or is integrally formed on installation portion 1, outside the opposite side of support body 1
The rear end on side face with radially projecting connection ear 1, connecting rod 1 is hinged in connection ear 1, connects ear
One 83 are located in the same diametric(al) of support body 1 with installation portion 1.As shown in fig. 7, movable knife rack 29 is including annular in shape
Support body 2 91, has the installation portion 2 92 for axially extending on the side outer peripheral face of support body 2 91, blade 2 11 is connected or one
It is molded on installation portion 2 92, there is radially projecting connection ear 2 93, connecting rod on the opposite side outer peripheral face of support body 2 91
26 rear end is hinged in connection ear 2 93, and connection ear 2 93 is located at the same diameter of support body 2 91 with installation portion 2 92
On direction.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement or using similar to described specific embodiment
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Although more having used base plate 1, eedle 2, lower axle 3, drive shaft 4, connecting rod 1, connecting rod 26, driving bent herein
Handle 7, body 71, connecting seat 72, linking arm 73, limited block 74, movable knife rack 1, support body 1, installation portion 1, connection ear
One 83, movable knife rack 29, support body 2 91, installation portion 2 92, connection ear 2 93, blade 1, blade 2 11, a of pin joint one,
The terms such as the b of pin joint two, lower axle protheca 12, convex shoulder 121, knife rest pressing plate 13, annular mounting groove 14, crash roll 15, but do not arrange
Except the possibility using other terms.It is used for the purpose of more easily describing and explaining of the present utility model using these terms
Matter；Any additional limitation is construed as all to be disagreed with the utility model spirit.
Claims (7)
1. a kind of thread cutting mechanism of sewing machine, the sewing machine includes base plate (1), eedle (2) and is rotatably connected on base plate (1)
Lower axle (3) and drive shaft (4), it is characterised in that the thread cutting mechanism include connecting rod one (5), connecting rod two (6), be connected in drive
Driving crank (7) on moving axis (4) and the movable knife rack one (8) and movable knife rack two (9) that are rotatably connected in lower axle (3), it is described
On movable knife rack one (8) have blade one (10), on the movable knife rack two (9) have blade two (11), the blade one (10) and
, positioned at the both sides of eedle (2), the front end of the connecting rod one (5) is hinged in driving crank (7) and formation is hinged for blade two (11)
Put one (a) and pin joint one (a) is located at the lower section of drive shaft (4), the rear end of the connecting rod one (5) is hinged on movable knife rack one (8)
On, the front end of the connecting rod two (6) is also articulated to drive on crank (7) and forms pin joint two (b) and pin joint two (b) is located at
The top of drive shaft (4), the rear end of the connecting rod two (6) is hinged on movable knife rack two (9), the blade one (10) and blade two
(11) can be drawn close to eedle (2) under the drive of connecting rod one (5) and connecting rod two (6) respectively and carry out shear action.
2. the thread cutting mechanism of sewing machine according to claim 1, it is characterised in that the driving crank (7) is including being connected
Block-shaped body (71) in drive shaft (4), the upper end of the body (71) has connecting seat (72), under the body (71)
End has the linking arm (73) extended obliquely downward to lower axle (3) side, and the front end of the connecting rod one (5) is hinged on linking arm
(73) pin joint one (a) is formed on free end, the front end of the connecting rod two (6) is hinged on connecting seat (72) and forms pin joint
Two (b).
3. the thread cutting mechanism of sewing machine according to claim 1 and 2, it is characterised in that the movable knife rack one (8) is including being in
The support body one (81) of ring-type, has the installation portion one (82) for axially extending, institute on the side outer peripheral face of the support body one (81)
State blade one (10) to be connected or be integrally formed on installation portion one (82), have on the opposite side outer peripheral face of the support body one (81)
Radially projecting connection ear one (83), the rear end of the connecting rod one (5) is hinged in connection ear one (83), the connection
Ear one (83) is with installation portion one (82) in the same diametric(al) of support body one (81).
4. the thread cutting mechanism of sewing machine according to claim 1 and 2, it is characterised in that the movable knife rack two (9) is including being in
The support body two (91) of ring-type, has the installation portion two (92) for axially extending, institute on the side outer peripheral face of the support body two (91)
State blade two (11) to be connected or be integrally formed on installation portion two (92), have on the opposite side outer peripheral face of the support body two (91)
Radially projecting connection ear two (93), the rear end of the connecting rod two (6) is hinged in connection ear two (93), the connection
Ear two (93) is with installation portion two (92) in the same diametric(al) of support body two (91).
5. the thread cutting mechanism of sewing machine according to claim 1 and 2, it is characterised in that on the outer peripheral face of the lower axle (3)
It is arranged and is fixed with the lower axle protheca (12) of tubular, the movable knife rack one (8) and movable knife rack two (9) side by side and are adjacent to and are set in
The front end of lower axle protheca (12), the movable knife rack one (8) and movable knife rack two (9) are rotated with lower axle protheca (12) and are connected.
6. the thread cutting mechanism of sewing machine according to claim 5, it is characterised in that the front end end of the lower axle protheca (12)
Portion is fixed with knife rest pressing plate (13) annular in shape, and the lower axle protheca (12) has convex shoulder (121) near the periphery of front end, described
Annular mounting groove (14), the movable knife rack one (8) and movable knife rack two (9) are formed between convex shoulder (121) and knife rest pressing plate (13)
In the annular mounting groove (14).
7. the thread cutting mechanism of sewing machine according to claim 2, it is characterised in that the free ending tool of the linking arm (73)
Limited location block (74), is fixed with crash roll (15), lower section of the crash roll (15) positioned at base plate (1) on the limited block (74)
And can be resisted against on base plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621314629.4U CN206279337U (en) | 2016-12-02 | 2016-12-02 | A kind of thread cutting mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621314629.4U CN206279337U (en) | 2016-12-02 | 2016-12-02 | A kind of thread cutting mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206279337U true CN206279337U (en) | 2017-06-27 |
Family
ID=59075955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621314629.4U Active CN206279337U (en) | 2016-12-02 | 2016-12-02 | A kind of thread cutting mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206279337U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268202A (en) * | 2017-08-11 | 2017-10-20 | 杰克缝纫机股份有限公司 | The 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 |
-
2016
- 2016-12-02 CN CN201621314629.4U patent/CN206279337U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268202A (en) * | 2017-08-11 | 2017-10-20 | 杰克缝纫机股份有限公司 | The 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 |
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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: 318000, No. 2299, Middle Road, Jiaojiang District, Zhejiang, Taizhou Patentee after: Zhejiang Baoyu sewing machine Co., Ltd Address before: 318000, No. 2299, Middle Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: ZHEJIANG BAOYU SEWING MACHINE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |