CN109234929A - A kind of thread cutting mechanism and sewing machine of sewing machine - Google Patents
A kind of thread cutting mechanism and sewing machine of sewing machine Download PDFInfo
- Publication number
- CN109234929A CN109234929A CN201811466317.9A CN201811466317A CN109234929A CN 109234929 A CN109234929 A CN 109234929A CN 201811466317 A CN201811466317 A CN 201811466317A CN 109234929 A CN109234929 A CN 109234929A
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- trimming
- knife
- drive shaft
- sewing machine
- crank
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- 238000009958 sewing Methods 0.000 title claims abstract description 54
- 230000007246 mechanism Effects 0.000 title claims abstract description 41
- 238000009966 trimming Methods 0.000 claims abstract description 195
- 230000009467 reduction Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2209/00—Use of special materials
- D05D2209/08—Use of special materials elastic, e.g. rubber spring
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention belongs to sewing device technical fields, are related to the thread cutting mechanism and sewing machine of a kind of sewing machine, and which solve existing thread cutting mechanisms to be easy the technical problems such as stuck.Thread cutting mechanism includes that lower axle, trimming cam, drive shaft, trimming time knife crank, shear spool and driving source component, lower axle are rotatably dispose on the bottom plate of sewing machine；Trimming cam is fixed in lower axle, and there is trimming section and return knife section, drive shaft is parallel with lower axle and is movably set on bottom plate, trimming returns knife crank and is fixed in drive shaft and has wire shear part and go back to knife portion, shear spool is coaxial with lower axle and is rotatably dispose on bottom plate, drive the output end of source component can be by driving drive shaft to slide towards shear spool, wire shear part that trimming is returned on knife crank and return knife portion respectively on trimming cam trimming section and time knife section be in contact, drive shaft passes through torque transmitter and trimming axis connection, the left end of shear spool is provided with trimming moving knife component.The present invention can effectively avoid phenomena such as stuck.
Description
Technical field
The invention belongs to sewing device technical fields, are related to the thread cutting mechanism and sewing machine of a kind of sewing machine.
Background technique
In the thread cutting mechanism of existing sewing machine, trimming component needs to realize following functions: trimming position and non-trimming position
Handoff functionality, forced resetting function etc..
A kind of trimming driving assembly, thread cutting mechanism as disclosed in China patent CN108385293A and sewing machine, power pass
Passing mechanism includes shear spool, trimming driving crank, drive shaft and driving cam；Forced resetting arm is fixed on shear spool；Trimming
Driving crank is set on shear spool, and is slidably connected by being slidably connected structure with shear spool, and driving is fixed in drive shaft
Cam, driving cam includes forced resetting portion and driving portion；Trimming drives crank in trimming and drives the driving portion of cam
Profile face contact；Forced resetting portion is opposite with forced resetting arm position, when for the non-normal reset of shear spool by reset portion with
The contact of reset arm carries out forced resetting.
But above-mentioned thread cutting mechanism still has the disadvantage that
Electromagnet is to drive ejector pin mobile by the iron core of electromagnet when driving trimming driving crank to horizontally slip, top
It sells and mutually reclines to drive trimming driving crank sliding with the side wall of trimming driving crank.Trimming drive crank side wall part by
Power, the axis for deviateing shear spool farther out, exist and are easy stuck risk.
Summary of the invention
The purpose of the present invention is there is the above problem in view of the prior art, a kind of thread cutting mechanism of sewing machine is proposed,
The technical problems to be solved by the present invention are: how to reduce the stuck risk of this thread cutting mechanism, cost is reduced.
Object of the invention can be realized by the following technical scheme:
A kind of thread cutting mechanism of sewing machine, which is characterized in that the thread cutting mechanism includes:
Lower axle, the lower axle are rotatably dispose on the bottom plate of sewing machine；
Trimming cam, the trimming cam are fixed in lower axle, are had trimming section on the trimming cam and are returned knife section；
Drive shaft, the drive shaft is parallel with lower axle, is rotatably dispose on bottom plate, and can slide axially along itself；
Trimming return knife crank, the trimming return knife crank be fixed in drive shaft, and have can respectively with trimming cam
On trimming section and return the wire shear part that matches of knife section and go back to knife portion；
Shear spool, the shear spool and lower axle are coaxial, and are rotatably dispose on bottom plate；
Source component is driven, the driving source component is fixed on bottom plate, and the output end of the driving source component can be with drive
The right end of moving axis is connected or reclines, by driving drive shaft to slide towards shear spool so that trimming return wire shear part on knife crank and
Return knife portion can respectively on trimming cam trimming section and time knife section be in contact；
Torque transmitter, the drive shaft pass through torque transmitter and trimming axis connection, and can be by drive shaft
Torque is transferred to shear spool；
Trimming moving knife component, the trimming moving knife component are set to the left end of the shear spool.
Its working principles are as follows: when normal sewing, lower axle being rotated by electrical motor of sewing machine, complete needed for sewing
Movement, the mechanism that electrical motor of sewing machine is rotated with lower axle is the prior art, is not repeated here herein, and trimming returns knife crank at this time
On trimming section be located at trimming cam trimming section right side, drive shaft and shear spool will not be swung；And works as and need trimming
When, driving source drives drive shaft to slide towards shear spool, so that trimming returns the wire shear part on knife crank and the trimming on trimming cam
Section is in contact, and the rotation of lower axle drives trimming cam swings, and then trimming is driven to return knife crank-swinging, so that drive shaft be driven to put
It is dynamic, since design has torque transmitter between drive shaft and shear spool, the swing of drive shaft can be transferred on shear spool, be made
The trimming moving knife component movement on shear spool is obtained, realizes trimming.Since drive shaft and shear spool are coaxially disposed, and drive source component
Output end act in drive shaft so that each trimming return knife crank-motion when driving force effect drive shaft axis
On, it is not susceptible to stuck phenomenon.In addition, trimming return knife crank on design have can respectively on trimming cam trimming section and
The wire shear part and go back to knife portion that knife section is in contact are returned, drive crank with prior art trimming and goes back to the side of knife driving crank spaced design
Formula is compared, and assembly process can be saved, and is installed more quick；And structure is more simplified, and production cost can be reduced.
In a kind of thread cutting mechanism of above-mentioned sewing machine, the torque transmitter includes sliding slot and boss, the cunning
Slot is opened at the right end of shear spool, and the boss is fixed at the left end of drive shaft, and the boss is plugged in sliding slot and energy
Enough sliding axially along drive shaft.When driving source drives drive shaft to slide towards shear spool, the boss of drive shaft left end can be in cunning
Synchronous slide in slot；When the trimming cam driven trimming in lower axle returns knife crank-swinging, trimming returns knife crank handle turns drive shaft
It swings, and then passes through the cooperation of boss and chute wall, transfer a torque to shear spool, drive shear spool to swing, to realize
Trimming.
In a kind of thread cutting mechanism of above-mentioned sewing machine, it includes ontology that the trimming, which returns knife crank, is opened on the ontology
Equipped with through-hole, the torque transmitter is located in the through-hole.Torque transmitter is designed in through-hole, which can both rise
To the effect of guiding, and it can avoid greasy dirt, dust in sewing machine and enter torque transmitter generation clamping stagnation, influencing torque just
Often transmitting.
In a kind of thread cutting mechanism of above-mentioned sewing machine, the left end of the drive shaft is located in the through-hole, and described
The side wall of body offers the fixation hole being connected with the through-hole, and being plugged in the fixation hole can fix with the drive shaft
The fastener of cooperation.
In a kind of thread cutting mechanism of above-mentioned sewing machine, the ontology extend radially outward to be formed the wire shear part and
Knife portion is gone back to, is movably set with the roller that can be in contact with the trimming section on the trimming cam on the wire shear part, described time
Being movably set in knife portion can be with the pin shaft for returning knife section and being in contact on the trimming cam.After design has roller and pin shaft,
Movement when trimming cam may make to return the cooperation of knife crank with trimming is more smoothly.
In a kind of thread cutting mechanism of above-mentioned sewing machine, stationary knife is fixed on the bottom plate of sewing machine, the stationary knife is located at
The left end of lower axle；The trimming moving knife component includes trimming crank, trimming connecting rod, movable knife rack and moving knife, the trimming crank
One end and the left end of the shear spool are fixedly connected with, the both ends of the trimming connecting rod respectively with the other end of the trimming crank and
Movable knife rack is hinged, and the moving knife is fixed on movable knife rack.Shear spool swing can drive trimming crank synchronous hunting, and then pass through
Trimming connecting rod drives movable knife rack to swing, so that trimming is realized in moving knife and stationary knife cooperation.
In a kind of thread cutting mechanism of above-mentioned sewing machine, fixing sleeve, the shear spool are fixed on the bottom plate of sewing machine
Across the fixing sleeve, reduction torsion spring is arranged on the fixing sleeve, the effect end of the reduction torsion spring and the trimming crank connect
Connect or against.Shear spool is swung, and is driven trimming crank-swinging and is swung moving knife around lower axle by the effect of trimming connecting rod and realizes
Trimming；After trimming, trimming crank can reset under the action of reduction torsion spring, to carry out next trimming.
In a kind of thread cutting mechanism of above-mentioned sewing machine, the right end of the fixing sleeve is fixed with retaining ring, the retaining ring with
Trimming returns between knife crank and is provided with reseting pressuring spring, and the reseting pressuring spring is sheathed on shear spool；When the reseting pressuring spring is in
When reset state, the trimming goes back to the right side that knife crank is located at the trimming cam.When trimming, driving source overcomes reseting pressuring spring
Elastic force makes trimming return knife crank and moves to left to recline with trimming cam and realize trimming；After trimming, trimming, which returns knife crank, to be resetted
It resets to move to right under the action of pressure spring and not be in contact with trimming cam.
A kind of sewing machine, which is characterized in that the sewing machine includes above-mentioned thread cutting mechanism.
Compared with prior art, the invention has the following advantages that
1, since drive shaft and shear spool are coaxially disposed, and the output end of source component is driven to act in drive shaft, thus
So that driving force effect when each trimming time knife crank-motion is not susceptible to stuck phenomenon on the axis of drive shaft；
2, trimming return design on knife crank have can respectively with the trimming section on trimming cam and return cutting of being in contact of knife section
Line portion and time knife portion can save dress compared with the mode of prior art trimming driving crank and time knife driving crank spaced design
With process, install more quick.
Detailed description of the invention
Fig. 1 is the axonometric drawing of this thread cutting mechanism in embodiment.
Structural schematic diagram when Fig. 2 is this thread cutting mechanism trimming in embodiment.
Structural schematic diagram when Fig. 3 is the non-trimming of this thread cutting mechanism in embodiment.
Fig. 4 is the positional diagram in embodiment between each component.
Fig. 5 is the cooperation figure that trimming cam and trimming return between knife crank in embodiment.
Fig. 6 is the structural schematic diagram of this torque transmitter in embodiment.
Fig. 7 is the structural schematic diagram of this trimming cam in embodiment.
Fig. 8 is the structural schematic diagram that this trimming returns knife crank in embodiment.
Fig. 9 is the structural schematic diagram of this shear spool in embodiment.
Figure 10 is the structural schematic diagram of this drive shaft in embodiment.
In figure, 1, lower axle；2, bottom plate；3, trimming cam；4, trimming section；5, Hui Daoduan；6, drive shaft；7, it is bent to return knife for trimming
Handle；8, knife portion is gone back to；9, shear spool；10, source component is driven；11, torque transmitter；12, sliding slot；13, boss；14, ontology；
15, through-hole；16, fixation hole；17, roller；18, pin shaft；19, stationary knife；20, trimming crank；21, trimming connecting rod；22, movable knife rack；
23, moving knife；24, fixing sleeve；25, reduction torsion spring；26, retaining ring；27, reseting pressuring spring；28, wire shear part；29, trimming moving knife component.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
As shown in Fig. 1, Fig. 5, Fig. 7, thread cutting mechanism includes lower axle 1 and trimming cam 3, and lower axle 1 is rotatably dispose in sewing machine
Bottom plate 2 on, trimming cam 3 is fixed in lower axle 1, on trimming cam 3 have trimming section 4 and return knife section 5.In the present embodiment,
Trimming cam 3 is preferably two-piece type structure, is divided into trimming body and forces back cutter hub, the two can be an integral structure and can also be used
Fastener is fixedly connected with, and in order to fix trimming cam 3, body portion can forced back to design screw.As other schemes, trimming is convex
Three-chip type structure can also be used in wheel 3, in trimming body and forces back between cutter hub designed for the fixed part fixed with 1 phase of lower axle.
As shown in Fig. 1, Fig. 5, Fig. 8, thread cutting mechanism includes that drive shaft 6 and trimming return knife crank 7, drive shaft 6 and 1 phase of lower axle
In parallel, it is rotatably dispose on bottom plate 2, and can slide axially along itself.In the present embodiment, offered on the bottom plate 2 of sewing machine
Mounting hole, drive shaft 6 passes through the mounting hole and the two activity cooperates；Certainly, if designing the parts such as axle sleeve on a base plate 2, make
Drive shaft 6 is matched with axle sleeve can also.Trimming return knife crank 7 be fixed in drive shaft 6, and have can respectively with trimming cam
The wire shear part 28 and go back to knife portion 8 that trimming section 4 and time knife section 5 on 3 match.Specifically, it includes ontology that trimming, which returns knife crank 7,
14, ontology 14 extends radially outward to form wire shear part 28 and go back to knife portion 8, and being movably set on wire shear part 28 can be convex with trimming
The roller 17 that trimming section 4 on wheel 3 is in contact returns and is movably set in knife portion 8 and can return 5 phase of knife section on trimming cam 3
The pin shaft 18 of contact.Trimming, which returns knife crank 7, can be designed as integral type scheme, certainly can also set wire shear part 28 and time knife portion 8
It is calculated as split type, and is fixedly connected with by fastener, in order to improve the assembly efficiency, can be assembled and be placed into sewing machine in advance
It is assembled.
As shown in Figure 1, Figure 2, Figure 3 shows, thread cutting mechanism includes the shear spool 9 being coaxially disposed with drive shaft 6, and shear spool 9 rotates
It is set on bottom plate 2.Specifically, be fixed with fixing sleeve 24 on the bottom plate 2 of sewing machine, shear spool 9 pass through the fixing sleeve 24 and
The two is rotatably assorted.
As shown in Figure 1, Figure 2, Figure 3 shows, thread cutting mechanism includes driving source component 10, and driving source component 10 is fixed on bottom plate 2,
The output end of driving source component 10 can be connected or recline with the right end of drive shaft 6, by driving drive shaft 6 sliding towards shear spool 9
It is dynamic, wire shear part 28 that trimming is returned on knife crank 7 and return knife portion 8 respectively with the trimming section 4 and time knife on trimming cam 3
Section 5 is in contact.Driving source component 10 may include electromagnet, cylinder or linear motor etc..It is preferably electromagnet in the present embodiment.
The mandrel of electromagnet directly can mutually recline with the right end of drive shaft 6, can also design between the mandrel and drive shaft 6 of electromagnet
Connector, the connector also belong to a part of driving source component 10.Similarly, it changes and makees cylinder and linear motor is same.In addition,
Fit system there are many driving between the output end of source component 10 and the right end of drive shaft 6, can be the shape for being always maintained at contact
State can also move to left the scheme that could be contacted with 6 right end of drive shaft after a distance using output end, or even can also use defeated
The scheme that outlet is connected with drive shaft 6.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 6, Fig. 9, Figure 10, drive shaft 6 is connected by torque transmitter 11 and shear spool 9
It connects, and the torque of drive shaft 6 can be transferred to shear spool 9, trimming moving knife component 29 is set to the left end of shear spool 9.This reality
It applies in example, torque transmitter 11 includes sliding slot 12 and boss 13, and sliding slot 12 is opened at the right end of shear spool 9, and boss 13 is solid
At the left end of drive shaft 6, boss 13 is plugged in sliding slot 12 and being capable of sliding axially along drive shaft 6.It should be noted that
It is that the shape of sliding slot 12 is not limited to bar shaped shown in figure, section is designed as all kinds of shapes such as rectangular.Sliding slot 12
Quantity is also not limited, if as sliding slot 12 quantity there are two, the section of sliding slot 12 can be designed as circle, two boss
13 match with the sliding slot 12, the transmitting of same achievable torque.In addition, if the position of sliding slot 12 and boss 13 was exchanged
Come can also, such as sliding slot 12 is designed in drive shaft 6, boss 13 is designed on shear spool 9.The connection of boss 13 and drive shaft 6
Mode can use integral type, split type scheme can also be used certainly.
As shown in Fig. 6, Fig. 8, through-hole 15 is offered on ontology 14, torque transmitter 11 is located in the through-hole 15.Specifically
For, the left end of drive shaft 6 and the right end of shear spool 9 are respectively positioned in through-hole 15, and the side wall of ontology 14 offers and 15 phase of through-hole
The fixation hole 16 of connection, being plugged in fixation hole 16 can be with the fastener of 6 secure fit of drive shaft.Spiral shell can be used in the fastener
It follows closely, the threaded hole that can be connected with the screw can be designed in drive shaft 6.Certainly, as other schemes, fastener uses pin
The scheme of nail can also.
As shown in Figure 1, Figure 2, Figure 3 shows, thread cutting mechanism includes trimming moving knife component 29.Specifically, on the bottom plate 2 of sewing machine
It is fixed with stationary knife 19, stationary knife 19 is located at the left end of lower axle 1；Trimming moving knife component 29 includes trimming crank 20, trimming connecting rod 21, moves
Knife rest 22 and moving knife 23, one end of trimming crank 20 and the left end of shear spool 9 are fixedly connected with, the both ends of trimming connecting rod 21 respectively with cut
The other end and movable knife rack 22 of line crank 20 are hinged, and moving knife 23 is fixed on movable knife rack 22.As other schemes, can also save
Slightly stationary knife 19, trimming moving knife component 29 is designed as two sets can be around the moving knife 23, trimming connecting rod 21 and trimming crank that lower axle 1 is swung
20, by the swing of lower axle 1, corresponding trimming crank 20, trimming connecting rod 21 and trimming moving knife 23 is driven to move, realizes trimming.
It is resetted to realize, as shown in Figure 1, Figure 2, Figure 3 shows, reduction torsion spring 25, reduction torsion spring 25 is arranged on fixing sleeve 24
Effect end connect with trimming crank 20 or against.The right end of fixing sleeve 24 is fixed with retaining ring 26, and it is bent that retaining ring 26 and trimming return knife
Reseting pressuring spring 27 is provided between handle 7, reseting pressuring spring 27 is sheathed on shear spool 9；When reseting pressuring spring 27 is in reset state,
Trimming goes back to the right side that knife crank 7 is located at trimming cam 3.
In order to avoid interfering between component each during trimming, as shown in figure 4, being attracted completely in driving source component 10
When, L0 is driving 10 range of source component, and L1 is the distance between drive shaft 6 and 9 end face of shear spool, and L2 is in drive shaft 6
13 length of boss, such as change and make other connection types, dimension reference boss 13, L3 is 18 end face of pin shaft to trimming cam
The distance of 3 end faces, L4 are the effective length of pin shaft 18, wherein L1 > 0, guarantee that shear spool 9 will not be collided with drive shaft 6, wherein
L2 > L0+L1 guarantees whenever drive shaft 6 and shear spool 9 have contact, wherein L3 > 0, guarantee pin shaft 18 always with trimming
Cam 3 can touch, wherein L4 > L0+L3, guarantee that trimming returns knife crank 7 and will not collide with trimming cam 3.
As shown in figure 5, in trimming moment, i.e., when trimming cam 3 lifts roller 17 and reaches the limit of, pin shaft 18 and trimming are convex
There is distance m in the knife section 5 of returning of wheel 3, wherein m > 0, if having cut line fails back knife, i.e. reduction torsion spring 25 fails to make trimming crank
20 reset, then time knife section 5 of trimming cam 3 can contact with pin shaft 18 and trimming is made to return knife crank 7 and swing, and are transmitted most by movement
Eventually reset trimming moving knife component 29.
The present invention also provides a kind of sewing machines including above-mentioned thread cutting mechanism.
Working principle of the present invention is as follows: when normal sewing, lower axle 1 being rotated by electrical motor of sewing machine, complete
Movement needed for sewing, the trimming section 4 that trimming returns on knife crank 7 at this time are located at the right side of the trimming section 4 of trimming cam 3, driving
Axis 6 and shear spool 9 will not be swung；And when needing trimming, driving source drives drive shaft 6 to slide towards shear spool 9, so that cutting
The wire shear part 28 that line returns on knife crank 7 is in contact with the trimming section 4 on trimming cam 3, and the rotation of lower axle 1 drives trimming cam 3
It swings, and then drives trimming to return knife crank 7 and swing, to drive drive shaft 6 to swing, due to setting between drive shaft 6 and shear spool 9
In respect of torque transmitter 11, the swing of drive shaft 6 can be transferred on shear spool 9, so that the trimming movable cutter set on shear spool 9
Part 29 moves, and realizes trimming.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (9)
1. a kind of thread cutting mechanism of sewing machine, which is characterized in that the thread cutting mechanism includes:
Lower axle (1), the lower axle (1) are rotatably dispose on the bottom plate (2) of sewing machine；
Trimming cam (3), the trimming cam (3) are fixed on lower axle (1), have trimming section (4) on the trimming cam (3)
With time knife section (5)；
Drive shaft (6), the drive shaft (6) is parallel with lower axle (1), is rotatably dispose on bottom plate (2), and can be along itself axis
To sliding；
Trimming return knife crank (7), the trimming return knife crank (7) be fixed on drive shaft (6), and have can respectively with trimming
The wire shear part (28) and go back to knife portion (8) that trimming section (4) and time knife section (5) on cam (3) match；
Shear spool (9), the shear spool (9) and lower axle (1) coaxially, and are rotatably dispose on bottom plate (2)；
It drives source component (10), the driving source component (10) is fixed on bottom plate (2), the output of driving source component (10)
End can be connected or recline with the right end of drive shaft (6), by driving drive shaft (6) to slide towards shear spool (9), so that trimming returns
Wire shear part (28) on knife crank (7) and return knife portion (8) can respectively with the trimming section (4) and time knife section on trimming cam (3)
(5) it is in contact；
Torque transmitter (11), the drive shaft (6) are connect by torque transmitter (11) with shear spool (9), and can
The torque of drive shaft (6) is transferred to shear spool (9)；
Trimming moving knife component (29), the trimming moving knife component (29) are set to the left end of the shear spool (9).
2. the thread cutting mechanism of sewing machine according to claim 1, which is characterized in that the torque transmitter (11) includes
Sliding slot (12) and boss (13), the sliding slot (12) are opened at the right end of shear spool (9), and the boss (13) is fixed on driving
At the left end of axis (6), the boss (13) is plugged in sliding slot (12) and being capable of sliding axially along drive shaft (6).
3. the thread cutting mechanism of sewing machine according to claim 2, which is characterized in that the trimming goes back to knife crank (7) and includes
Ontology (14) offers through-hole (15) on the ontology (14), and the torque transmitter (11) is located in the through-hole (15).
4. the thread cutting mechanism of sewing machine according to claim 3, which is characterized in that the left end of the drive shaft (6) is located at
In the through-hole (15), the side wall of the ontology (14) offers the fixation hole (16) being connected with the through-hole (15), described
Being plugged in fixation hole (16) can be with the fastener of the drive shaft (6) secure fit.
5. the thread cutting mechanism of sewing machine according to claim 1 or 2 or 3 or 4, which is characterized in that ontology (14) edge
It extends radially outwardly to form the wire shear part (28) and go back to knife portion (8), being movably set on the wire shear part (28) can be with institute
The roller (17) that the trimming section (4) on trimming cam (3) is in contact is stated, being movably set on described time knife portion (8) can be with institute
State the pin shaft (18) for going back to knife section (5) and being in contact on trimming cam (3).
6. the thread cutting mechanism of sewing machine according to claim 1 or 2 or 3 or 4, which is characterized in that the bottom plate (2) of sewing machine
On be fixed with stationary knife (19), the stationary knife (19) is located at the left end of lower axle (1)；The trimming moving knife component (29) includes trimming song
Handle (20), trimming connecting rod (21), movable knife rack (22) and moving knife (23), one end of the trimming crank (20) and the shear spool
(9) left end is fixedly connected with, the both ends of the trimming connecting rod (21) other end and moving knife with the trimming crank (20) respectively
Frame (22) is hinged, and the moving knife (23) is fixed on movable knife rack (22).
7. the thread cutting mechanism of sewing machine according to claim 6, which is characterized in that be fixed on the bottom plate (2) of sewing machine
Fixing sleeve (24), the shear spool (9) pass through the fixing sleeve (24), are arranged with reduction torsion spring (25) on the fixing sleeve (24),
The effect end of the reduction torsion spring (25) connect with the trimming crank (20) or against.
8. the thread cutting mechanism of sewing machine according to claim 7, which is characterized in that the right end of the fixing sleeve (24) is fixed
Have retaining ring (26), the retaining ring (26) and trimming return between knife crank (7) and be provided with reseting pressuring spring (27), the reseting pressuring spring
(27) it is sheathed on shear spool (9)；When the reseting pressuring spring (27) is in reset state, the trimming goes back to knife crank (7) position
In the right side of the trimming cam (3).
9. a kind of sewing machine, which is characterized in that the sewing machine includes the thread trimmer as described in claim 1-8 any one
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811466317.9A CN109234929B (en) | 2018-12-03 | 2018-12-03 | Thread cutting mechanism of sewing machine and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811466317.9A CN109234929B (en) | 2018-12-03 | 2018-12-03 | Thread cutting mechanism of sewing machine and sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109234929A true CN109234929A (en) | 2019-01-18 |
| CN109234929B CN109234929B (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811466317.9A Active CN109234929B (en) | 2018-12-03 | 2018-12-03 | Thread cutting mechanism of sewing machine and sewing machine |
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| Country | Link |
|---|---|
| CN (1) | CN109234929B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130012A (en) * | 2019-07-01 | 2019-08-16 | 浙江龙泰缝纫设备有限公司 | Thread shearing device of sewing machine |
| 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 |
| CN114687082A (en) * | 2020-12-31 | 2022-07-01 | 杰克科技股份有限公司 | Sewing machine and thread cutting method thereof |
| CN116497532A (en) * | 2023-06-28 | 2023-07-28 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110130012A (en) * | 2019-07-01 | 2019-08-16 | 浙江龙泰缝纫设备有限公司 | Thread shearing device of sewing machine |
| CN110130012B (en) * | 2019-07-01 | 2021-03-30 | 浙江龙泰缝纫设备有限公司 | Thread cutting device of sewing machine |
| 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 |
| CN114687082A (en) * | 2020-12-31 | 2022-07-01 | 杰克科技股份有限公司 | Sewing machine and thread cutting method thereof |
| CN116497532A (en) * | 2023-06-28 | 2023-07-28 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
| CN116497532B (en) * | 2023-06-28 | 2023-08-29 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
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