CN109837661A - A kind of sewing machine and its thread cutting mechanism - Google Patents
A kind of sewing machine and its thread cutting mechanism Download PDFInfo
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- CN109837661A CN109837661A CN201910150531.1A CN201910150531A CN109837661A CN 109837661 A CN109837661 A CN 109837661A CN 201910150531 A CN201910150531 A CN 201910150531A CN 109837661 A CN109837661 A CN 109837661A
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- trimming
- drive rod
- connecting rod
- left trimming
- sewing machine
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Abstract
The present invention discloses a kind of sewing machine of thread cutting mechanism of sewing machine, the left trimming connection component being hinged respectively with right trimming drive rod and left trimming drive rod including right trimming drive rod, left trimming drive rod and both ends, left trimming connection component includes at least two left trimming connecting rods being slidably connected, and further includes the electromagnetism limit assembly of several junctions set on arbitrary neighborhood two left trimming connecting rods.Electromagnetism limit assembly is closed to limit two neighboring left trimming rod slide, right trimming drive rod and left trimming drive rod synchronization action, cuts double slit line；Start electromagnetism limit assembly so that the opposite sliding of adjacent two left trimming connecting rod, right trimming drive rod cut single suture relative to left trimming drive rod single movement.Left trimming drive rod can be failure to actuate when due to the movement of right trimming drive rod, and left trimming drive rod keeps the cut suture of clamping to fall off to prevent suture, therefore functional reliability is promoted.Invention additionally discloses a kind of sewing machines comprising thread cutting mechanism of sewing machine.
Description
Technical field
The present invention relates to garment devices field, in particular to a kind of thread cutting mechanism of sewing machine.The invention further relates to a kind of packets
Sewing machine containing thread cutting mechanism of sewing machine.
Background technique
Existing electromechanical integration sewing device, especially automatic sewing machine, are adopted by clothes production enterprise more and more
With so that the whole production efficiency and product quality of clothes production enterprise obtain steady promotion.Existing automatic sewing machine
It is commonly configured with thread cutting mechanism, replaces manual trimming, to meet the promotion of production efficiency, therefore improvement thread cutting mechanism seems especially
It is necessary.
As shown in Fig. 1, existing thread cutting mechanism include right wire shear part 01, left wire shear part 02 and both ends respectively with right trimming
The left trimming connecting rod 03 that portion 01 and left wire shear part 02 are hinged, wherein right wire shear part 01 includes driving right moving knife relative to the right side
The right movable arbor of stationary knife movement, left wire shear part 02 includes the left movable arbor for driving left moving knife to act relative to left stationary knife, to make
Right wire shear part 01 and left wire shear part 02 could be used for cutting suture, and right wire shear part 01 and left wire shear part 02 are equal after cutting suture
One end that suture is cut in residence can be clamped.When the movement of right wire shear part 01, right wire shear part 01 is driven by left trimming connecting rod 03
Left 02 synchronization action of wire shear part, right movable arbor and left movable arbor synchronization action, to keep right wire shear part 01 and left wire shear part 02 real
It now links, and then realizes and cut double slit line.However, existing thread cutting mechanism can not make right wire shear part 01 relative to left wire shear part 02
Realize single movement, when right 01 single movement of wire shear part, left wire shear part 02 easily because with right wire shear part 01 synchronization action due to make
Folded suture falls off, and seriously affects the smoothly sewing next time of left wire shear part 02.Therefore, the functional reliability of existing thread cutting mechanism
It is relatively poor.
Summary of the invention
In view of this, right movable arbor can be relative to a left side the purpose of the present invention is to provide a kind of thread cutting mechanism of sewing machine
Movable arbor movement, effectively avoids suture from falling off, functional reliability is promoted.Another object of the present invention is to provide a kind of packets
Sewing machine containing thread cutting mechanism of sewing machine, working efficiency are promoted.
Its concrete scheme is as follows:
The present invention provides a kind of thread cutting mechanism of sewing machine, comprising:
For driving the right trimming drive rod of right movable arbor rotation；
For driving the left trimming drive rod of left movable arbor rotation；
The left trimming connection component that both ends are hinged with the right trimming drive rod and the left trimming drive rod respectively；Institute
Stating left trimming connection component includes at least two left trimming connecting rods being slidably connected；
Several junctions set on the arbitrary neighborhood two left trimming connecting rods, limited for selectivity it is two neighboring described
The electromagnetism limit assembly of left trimming rod slide.
Preferably, the electromagnetism limit assembly includes:
It is fixedly arranged on the electromagnetic driver of the left trimming connecting rod；
For selectively passing through the limit pin shaft of the junction of the two neighboring left trimming connecting rod；
Lug boss and the left trimming connecting rod where the electromagnetic driver be hinged and both ends respectively with the electromagnetism
Actuator and the limit pin shaft are hinged, for driving the limit pin shaft from the connection of the two neighboring left trimming connecting rod
The V-type rotating turret of place's insertion or abjection.
Preferably, the left trimming connection component includes for supporting the first of the electromagnetic driver the left trimming to connect respectively
Bar and the second left trimming connecting rod being connect with the described first left trimming rod slide, the electromagnetism limit assembly further include:
It is fixedly arranged on the described first left trimming connecting rod, for passing through the of the described first left trimming connecting rod for the limit pin shaft
One position-limited rack, first position-limited rack have the upper limit guide sleeve for guiding the limit pin shaft mobile；
Be fixedly arranged on the described first left trimming connecting rod close to described second left trimming connecting rod one end, for supply the limit pin shaft
Across the second position-limited rack of the upper limit guide sleeve partially passed through, second position-limited rack has and the upper limit guide sleeve phase
Penetrate through the lower limit guide sleeve to guide the limit pin shaft to continue to move to.
Preferably, the periphery of the limit pin shaft be installed with offset with the upper limit guide sleeve, the bullet for eliminating noise
Property set.
Preferably, further includes:
For adjusting the slide link of two-shipper needle separation；
Set on the slide link, the position detecting device for detecting the slide link position；
It is connected respectively with the position detecting device and the electromagnetic driver, for being sent out according to the position detecting device
The signal sent controls the control device that the electromagnetic driver drives the limit pin shaft movement.
Preferably, further includes:
Support base；
First end is articulated with the support base and second end is installed on the main main drive rod for driving cam, the main drive rod
Second end there is the driving idler wheel matched with the cam path of the main driving cam to drive the main drive rod movement；
First end is hinged by the second end of right drive shaft and the main drive rod and second end and the right trimming
Drive rod is hinged, for driving the right trimming of the right trimming drive rod rotation to connect far from described left trimming connection component one end
Bar.
Preferably, further includes:
First end is installed on the right drive shaft and second end is installed on right support column set by the support base, is used for
The right return springs for assisting the main drive rod to automatically reset after the main drive rod movement.
Preferably, further includes:
Left shuttle frame for being passed through for the left movable arbor；
First end is installed on the left trimming drive rod and second end is installed on left support column set by the left shuttle frame, uses
In the left limit elasticity for limiting the left trimming drive rod rotation when any two neighboring left trimming connecting rod is relative to sliding
Part.
Preferably, further includes:
Right shuttle frame for being passed through for the right movable arbor；
It is fixedly arranged on the right shuttle frame, the right stopper posts for limiting the right trimming drive rod rotation；
It is fixedly arranged on the left shuttle frame, the left stopper posts for limiting the left trimming drive rod rotation.
The present invention also provides a kind of sewing machine, sewing machine body and it is described in any of the above embodiments be set to the sewing machine body
Thread cutting mechanism of sewing machine.
With respect to the background art, the sewing machine of thread cutting mechanism of sewing machine provided by the present invention, including it is right dynamic for driving
The right trimming drive rod of cutter shaft rotation, the left trimming drive rod for driving left movable arbor rotation and both ends are cut with the right side respectively
The left trimming connection component that line drive rod and the left trimming drive rod are hinged, the left trimming connection component include at least two
A left trimming connecting rod being slidably connected further includes several junctions set on the arbitrary neighborhood two left trimming connecting rods, is used for
Selectivity limits the electromagnetism limit assembly of the two neighboring left trimming rod slide.
When closing the electromagnetism limit assembly, it is sliding that the electromagnetism limit assembly limits the two neighboring left trimming connecting rod
Dynamic, the two neighboring left trimming connecting rod is equivalent to a connecting rod relative to fixation, the left trimming connection component described at this time；When
When the right trimming drive rod acts, the right trimming drive rod drives the left trimming to drive by the left trimming connection component
Lever synchronization action is realized so that the right movable arbor and the left movable arbor be made to rotate synchronously and cuts double slit line；
When starting the electromagnetism limit assembly, the electromagnetism limit assembly can not limit the two neighboring left trimming and connect
Bar sliding, the two neighboring left trimming connecting rod can be realized opposite sliding, and the left trimming connection component described at this time is equivalent to one
Root telescopic rod；When right trimming drive rod movement, the right trimming drive rod is opposite by the left trimming connection component
In the left trimming drive rod single movement, effectively avoid the right trimming drive rod and the left trimming drive rod synchronous dynamic
Make, so that the right movable arbor be enable individually to rotate relative to the left movable arbor, realizes and cut single suture.Further
Ground, when the right trimming drive rod movement when, the left trimming drive rod can be failure to actuate, the left trimming drive rod because not with
The right trimming drive rod synchronization action and keep clamping cut suture, effectively prevent suture to fall off.
Therefore, the functional reliability of thread cutting mechanism of sewing machine provided by the present invention is promoted.
Sewing machine provided by the present invention including thread cutting mechanism of sewing machine, due to the reliable operation of thread cutting mechanism of sewing machine
Property promotion, reduce the failure rate of thread cutting mechanism of sewing machine, the non-productive work time shortens, therefore working efficiency is promoted.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structure chart of existing thread cutting mechanism of sewing machine；
Fig. 2 is a kind of structure chart of the provided thread cutting mechanism of sewing machine of specific embodiment of the present invention；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the front assembling assumption diagram for the other component being installed on support base；
Fig. 5 is support base in Fig. 4 close to the detonation configuration figure of left trimming connection component side；
Fig. 6 is the backside structure figure of Fig. 4；
Fig. 7 is the assembling assumption diagram of left trimming connection component and electromagnetism limit assembly；
Fig. 8 be the second left trimming connecting rod, the second position-limited rack, limit pin shaft and V-type rotating turret assembling assumption diagram；
Fig. 9 is another assembling assumption diagram of left trimming connection component and electromagnetism limit assembly；
Figure 10 is the structure chart of the second position-limited rack；
Figure 11 is the structure chart of right trimming component；
Figure 12 is right moving knife hook line state diagram；
Figure 13 is right moving knife trimming state diagram；
Figure 14 is that shank adjusts component Facad structure figure；
Figure 15 is the backside structure figure of Figure 14；
Figure 16 is the installation diagram of position detecting device；
Figure 17 is the detonation configuration figure of Figure 16.
Appended drawing reference is as follows:
Right wire shear part 01, left wire shear part 02 and left trimming connecting rod 03；
Right movable arbor 1, left movable arbor 2, right trimming drive rod 3, left trimming drive rod 4, left trimming connection component 5, electromagnetism
Limit assembly 6, left shuttle frame 7, shank adjust component 8, support base 9, main drive rod 10, right trimming connecting rod 11, main driving cam 12,
Main connecting plate 13, right return springs 14, left limit elastic component 15, right shuttle frame 16, right stopper posts 17, left stopper posts 18, the right side are cut
Line component 19, left trimming component 20 and position detecting device 21；
Hall sensor 211, fixed retaining ring 212 and magnet steel 213；
First left trimming connecting rod 51 and the second left trimming connecting rod 52；
Electromagnetic driver 61, limit pin shaft 62, V-type rotating turret 63, the first position-limited rack 64, the second position-limited rack 65 and resilient sleeve
66；
Electromagnetic coil 611 and electromagnetic core 612；
Upper limit guide sleeve 641；
Lower limit guide sleeve 651；
Rotate driving lever 81, pivot link 82, slide link 83 and shank separating plate 84；
Right moving knife 191, right stationary knife 192, right driving leading truck 193, right moving knife driving sliding block 194 and right elastic supporting member for supporting optical member
195。
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to enable those skilled in the art to better understand the solution of the present invention, right in the following with reference to the drawings and specific embodiments
The present invention is described in further detail.
Fig. 2 to Figure 17 is please referred to, Fig. 2 is a kind of structure of the provided thread cutting mechanism of sewing machine of specific embodiment of the present invention
Figure；Fig. 3 is the top view of Fig. 2；Fig. 4 is the front assembling assumption diagram for the other component being installed on support base；Fig. 5 is in Fig. 4
Detonation configuration figure of the support base close to left trimming connection component side；Fig. 6 is the backside structure figure of Fig. 4；Fig. 7 is the connection of left trimming
The assembling assumption diagram of component and electromagnetism limit assembly；Fig. 8 turns for the second left trimming connecting rod, the second position-limited rack, limit pin shaft and V-type
The assembling assumption diagram of moving frame；Fig. 9 is another assembling assumption diagram of left trimming connection component and electromagnetism limit assembly；Figure 10 is second
The structure chart of position-limited rack；Figure 11 is the structure chart of right trimming component；Figure 12 is right moving knife hook line state diagram；Figure 13 is that right moving knife is cut
Line state diagram；Figure 14 is that shank adjusts component Facad structure figure；Figure 15 is the backside structure figure of Figure 14；Figure 16 is position detection dress
The installation diagram set；Figure 17 is the detonation configuration figure of Figure 16.
The embodiment of the invention discloses a kind of thread cutting mechanism of sewing machine, including right movable arbor 1, left movable arbor 2, right trimming to drive
Lever 3, left trimming drive rod 4, left trimming connection component 5 and electromagnetism limit assembly 6.
Right trimming drive rod 3 is placed on the periphery of right movable arbor 1 admittedly, makes right trimming drive rod 3 that right movable arbor 1 be driven to rotate.
In this specific embodiment, the cross section of right movable arbor 1 is preferably rounded.The structure of right trimming drive rod 3 is V-shaped, and its mistake
It crosses junction and is equipped with and have arc-shaped installation set jaggy, and it is one that the both ends of the notch are removably connected by holding screw
Body is conducive to promote adaptation so that arc-shaped installation set is adapted to the right movable arbor 1 that installation outer diameter changes in a certain range
Property.
Similarly, left trimming drive rod 4 is placed on the periphery of left movable arbor 2 admittedly, and left trimming drive rod 4 is made to drive left movable arbor
2 rotations.In this specific embodiment, left trimming drive rod 4 is disk-shaped, and equally distributed connection pawl there are three tools, and first
Connection pawl is hinged with left trimming connection component 5, and second connection pawl is installed with notch and for installing left movable arbor 2
Arc-shaped installation set, the fixed form of left movable arbor 2 is identical as right movable arbor 1, referring in particular to above content.
The both ends of left trimming connection component 5 are hinged with right trimming drive rod 3 and left trimming drive rod 4 respectively, left trimming
Connection component 5 includes at least two left trimming connecting rods being slidably connected.Preferably, in this specific embodiment, left trimming connection
Component 5 includes the first left trimming connecting rod 51 and the second left trimming connecting rod 52 being slidably connected.Specifically, the second left trimming connecting rod 52
The guide chute slided for the first left trimming connecting rod 51 is equipped with close to one end of the first left trimming connecting rod 51, correspondingly, first is left
Trimming connecting rod 51 is set to the guide runner that can be slided along guide chute close to one end of the second left trimming connecting rod 52.To prevent
Two left trimming connecting rods 52 are detached from the first left trimming connecting rod 51, and the slot edge of guide chute has been removably secured by holding screw leads
To baffle, so that guide runner be made to be sandwiched between guide chute and deflector apron.To further prevent the second left trimming connecting rod 52
It is detached from the first left trimming connecting rod 51, it can be in one end setting of the guide runner far from the first left trimming connecting rod 51 and guide chute
Slot is along the stop block to offset, and when guide runner slides into extreme position, the slot of stop block and guide chute is effectively prevented along offseting
Only guide runner is detached from guide chute.Certainly, the quantity for the left trimming connecting rod that left trimming connection component 5 is included is not limited to two
It is a, and the sliding type for the two left trimming connecting rods that are connected is without being limited thereto.
Electromagnetism limit assembly 6 includes several, and each electromagnetism limit assembly 6 is set to any two neighboring left trimming connecting rod of meaning
Junction, so that electromagnetism limit assembly 6 can selectively limit two neighboring left trimming rod slide.
When closing electromagnetism limit assembly 6, electromagnetism limit assembly 6 limits two neighboring left trimming rod slide, and adjacent two
A left trimming connecting rod is relative to fixation, and left trimming connection component 5 is equivalent to a connecting rod at this time；When right trimming drive rod 3 is dynamic
When making, right trimming drive rod 3 drives left 4 synchronization action of trimming drive rod by left trimming connection component 5, to make right movable arbor
1 and left movable arbor 2 rotate synchronously, realize cut double slit line；
When starting electromagnetism limit assembly 6, electromagnetism limit assembly 6 can not limit two neighboring left trimming rod slide, phase
Adjacent two left trimming connecting rods can be realized opposite sliding, and left trimming connection component 5 is equivalent to a telescopic rod at this time；When right trimming
When drive rod 3 acts, right trimming drive rod 3, relative to left 4 single movement of trimming drive rod, has by left trimming connection component 5
Effect avoids right trimming drive rod 3 and left 4 synchronization action of trimming drive rod, to enable right movable arbor 1 relative to left movable arbor 2
Individually rotation is realized and cuts single suture.
In conclusion left trimming drive rod 4 can be failure to actuate, left trimming drive rod 4 when the movement of right trimming drive rod 3
Because not with right trimming drive rod 3 synchronization action due to keep clamping cut suture, effectively prevent suture to fall off.Therefore, institute of the present invention
The functional reliability of the thread cutting mechanism of sewing machine of offer is promoted.
In this specific embodiment, it is preferable that electromagnetism limit assembly 6 includes electromagnetic driver 61, limit pin shaft 62, V-type
Rotating turret 63.
Electromagnetic driver 61 is fixedly arranged on one of them left trimming connecting rod, in this specific embodiment, electromagnetic driver 61
It is preferred that be fixedly arranged on the first left trimming connecting rod 51, and electromagnetic driver 61 includes electromagnetic coil 611 and electromagnetic core 612, wherein
Electromagnetic coil 611 is in rectangular ring, and electromagnetic core 612 is arranged in electromagnetic coil 611.When electromagnetic coil 611 is powered, electromagnet
Core 612 is mobile relative to electromagnetic coil 611；When 611 power loss of electromagnetic coil, electromagnetic core 612 is solid relative to electromagnetic coil 611
It is fixed.The side of electromagnetic coil 611 is by L-type coil mounting plate removably on the first left trimming connecting rod 51.L-type coil is fixed
Plate is preferably fixed using holding screw, but not limited to this.Further, electromagnetic driver 61 further includes being placed on electromagnetic core 612
The reset spring that periphery and one end and electromagnetic coil 611 offset, correspondingly, the periphery of electromagnetic core 612 are installed with and reset bullet
The abutting circlip that spring offsets far from one end of electromagnetic coil 611, so as to electromagnet after 611 power loss of electromagnetic coil, after movement
Core 612 can be restored automatically by reset spring to initial position, be conducive to promote convenience.
Limit pin shaft 62 can selectively pass through the junction of two neighboring left trimming connecting rod.The preferred circle of limit pin shaft 62
Axis pin of column, correspondingly, the junction of two neighboring left trimming connecting rod offer perforative limiting through hole.When limit pin shaft 62 successively
When across the limiting through hole of two neighboring left trimming connecting rod, limit pin shaft 62 limits two neighboring left trimming rod slide, adjacent
Two left trimming connecting rods are relatively fixed；Conversely, two neighboring left trimming connecting rod being capable of opposite sliding.
The lug boss of V-type rotating turret 63 is hinged with the left trimming connecting rod where electromagnetic driver 61, V-type rotating turret 63
Both ends are hinged with electromagnetic driver 61 and limit pin shaft 62 respectively, when electromagnetic core 612 is mobile relative to electromagnetic coil 611
When, electromagnetic core 612 drives V-type rotating turret 63 to act, so that V-type rotating turret 63 be made to drive limit pin shaft 62 from a two neighboring left side
The junction of trimming connecting rod is inserted into or abjection.
In this specific embodiment, V-type rotating turret 63 specifically includes the first linking arm being rotatablely connected with electromagnetic core 612
With the second linking arm being rotatablely connected with limit pin shaft 62, the angle of the first linking arm and the second linking arm is at an acute angle, the two
Junction forms lug boss.Correspondingly, electromagnetic core 612 is set to hinged mounting groove close to one end of the first linking arm, and first connects
Arm is connect equipped with waist type hinge hole, waist type hinge hole is accordingly passed through across the pin shaft of hinged mounting groove, to make electromagnetic core 612
It realizes and is rotatablely connected with the first linking arm.Similarly, the articulated manner and electromagnet between limit pin shaft 62 and the second linking arm
Receiving delivery system between core 612 and the first linking arm is identical, and details are not described herein.It should be noted that the first linking arm
Extend respectively along the length direction of the two with the waist type hinge hole on the second linking arm, to prevent V-type rotating turret 63 in rotation
It is stuck in rotation, it can effectively ensure that V-type rotating turret 63 smoothly acts.Certainly, the structure of V-type rotating turret 63 is without being limited thereto.
In the specific embodiment, electromagnetism limit assembly 6 further includes the first position-limited rack 64 and the second position-limited rack 65, wherein the
One position-limited rack 64 is fixedly arranged on the first left trimming connecting rod 51, to pass through the first left trimming connecting rod 51 for limit pin shaft 62, correspondingly,
First position-limited rack 64 has the upper limit guide sleeve 641 for guiding limit pin shaft 62 mobile.In this specific embodiment, the first limit
Position frame 64 is fixed on the first left trimming connecting rod 51 by holding screw, and upper limit guide sleeve 641 is fixedly arranged on the first position-limited rack 64 far
Side from the first left trimming connecting rod 51.Preferably, the lug boss of V-type rotating turret 63 is articulated with the first position-limited rack 64 by pin shaft
On.Certainly, the structure of the first position-limited rack 64 is without being limited thereto.
Second position-limited rack 65 is fixedly arranged on the second left trimming connecting rod 52 close to first left 51 one end of trimming connecting rod, for for limit
Pin shaft 62 passes through partially passing through for upper limit guide sleeve 641.Second position-limited rack 65, which has, to connect with upper limit guide sleeve 641 to guide
The lower limit guide sleeve 651 that limit pin shaft 62 continues to move to.Limit pin shaft 62 is respectively in upper limit guide sleeve 641 and lower limit guide sleeve
Moved under 651 guidance, prevent limit pin shaft 62 in moving process run-off the straight or offset phenomena such as, be conducive to eliminate limit
Pin shaft 62 is stuck in the first position-limited rack 64 or the second position-limited rack 65, being conducive to be further ensured that limit pin shaft 62 smoothly acts,
And then be conducive to promote functional reliability.
In this specific embodiment, the second position-limited rack 65 is detachably secured to the first left trimming connecting rod by holding screw
On 51, and lower limit guide sleeve 651 is fixedly arranged on the second position-limited rack 65 close to the side of the first left trimming connecting rod 51.In addition, the second limit
The two sides of position frame 65 offer two extensions along its length and for the waist type adjustment holes that holding screw passes through, and waist type adjustment hole is not
It only can satisfy crosspointer eedle position and adjust requirement, to occur relatively in the first left trimming connecting rod 51 and the second left trimming connecting rod 52
Limit pin shaft 62 can be made to match with lower limit guide sleeve 651 after movement；Further, waist type adjustment hole can also pass through adjusting
Fixation position of the holding screw in waist type adjustment hole to adjust the installation site of the second position-limited rack 65, and then adjusts lower limit
The concentricity of position guide sleeve 651 and upper limit guide sleeve 641, and then compensate the processing or system of the first position-limited rack 64 and the second position-limited rack 65
Error is made, adaptability increased naturally.
The periphery of limit pin shaft 62 is installed with resilient sleeve 66, and the periphery of resilient sleeve 66 can be with 641 phase of upper limit guide sleeve
Support, when limit pin shaft 62 is mobile, 66 one side of resilient sleeve prevents limit pin shaft 62 from shifting, on the other hand can eliminate because
Limit pin shaft 62 and upper limit guide sleeve 641 collide and the noise of generation.Resilient sleeve 66 can be rubber sleeve or nylon jacket, material
It is not especially limited.
It should be noted that as shown in Fig. 9, limit pin shaft 62 can also be after passing through the first left trimming connecting rod 51 again
Across the second left trimming connecting rod 52, has no effect on and achieve the object of the present invention.
For the switching for realizing crosspointer bar mode and single needle bar mode, the invention also includes shanks to adjust component 8, needle adjusting group
Part includes rotation driving lever 81, pivot link 82, slide link 83 and shank separating plate 84, wherein rotation driving lever 81 is set to casing
Outside, pivot link 82 are set to internal side of shell, and rotate driving lever 81 and be fixedly connected with pivot link 82, so as to pivot link 82 and rotation
Bar 81 is transferred to rotate synchronously.One end of slide link 83 and pivot link 82 are rotatablely connected, the other end and 84 phase of shank separating plate
It is connected.Shank separating plate 84 can be realized the separation of crosspointer bar.When stirring rotation driving lever 81, rotation driving lever 81 drives pivot link
82 rotations, pivot link 82 pull slide link 83 mobile, and slide link 83 drives shank separating plate 84 to act, to make shank
Separating plate 84 separates left and right crosspointer bar.
It should be noted that when double needle rod sewing machines need to execute turning sewing, it is necessary to start shank and adjust component
8, by crosspointer bar patterns of change at single needle bar mode, to guarantee suture beauty.
Correspondingly, the invention also includes position detecting device 21 and control devices.Position detecting device 21 is set to sliding and connects
On bar 83, for detecting 83 position of slide link.In this specific embodiment, position detecting device 21 includes being fixed by L-type
Hall sensor 211 that plate is fixed on support base 9 is placed on the fixation retaining ring 212 of 83 periphery of slide link admittedly and is installed on solid
Determine retaining ring 212 and match with Hall sensor 211 magnet steel 213 to realize signal transmission.Certainly, position detecting device 21
Type is without being limited thereto, is had no effect on and is achieved the object of the present invention using other kinds of position sensor.
Control device is connected with position detecting device 21 and electromagnetic driver 61 respectively, so that control device is examined according to position
Surveying the signal control electromagnetic driver 61 that device 21 is sent drives limit pin shaft 62 to act.
In this specific embodiment, when becoming single needle bar mode from crosspointer bar mode, forward direction stirs rotation driving lever 81,
Rotation driving lever 81 is stirred to the left, and rotation driving lever 81 drives slide link 83 positive mobile by pivot link 82, slide link
83 drive magnet steel 213 are moved to target position, and Hall sensor 211 senses that magnet steel 213, Hall sensor 211 are sent at this time
Signal is to control device, and for post legged sewing machine pedal to feed back trimming signal to control device, control device controls electromagnetic driver
61 electromagnetic coil 611 it is electric, electromagnetic core 612 pull V-type rotating turret 63, make V-type rotating turret 63 drive limit pin shaft 62 from
Abjection, keeps the first left trimming connecting rod 51 and the second left trimming connecting rod 52 real in upper limit guide sleeve 641 and lower limit guide sleeve 651
Now opposite sliding is realized to make right trimming drive rod 3 relative to the independent rotation of left trimming drive rod 4 and cuts single suture.
When becoming crosspointer bar mode from single needle bar mode, rotation driving lever 81 is reversely stirred, rotation driving lever 81 passes through rotation
Connecting rod 82 drives slide link 83 to move backward, and slide link 83 drives magnet steel 213 to be moved to initial position, at this time hall sensing
Device 211 senses that magnet steel 213, Hall sensor 211 send a signal to control device again, receives the control dress of trimming signal
611 power loss of electromagnetic coil of control electromagnetic driver 61 is set, electromagnetic core 612 pushes V-type rotating turret 63, makes V-type rotating turret 63
It drives limit pin shaft 62 to be inserted into upper limit guide sleeve 641 and lower limit guide sleeve 651, cuts the first left trimming connecting rod 51 and second left side
Line connecting rod 52 is fixed with one, so that right trimming drive rod 3 and left trimming drive rod 4 be made to rotate synchronously, and then makes right movable arbor 1
It realizes and rotates synchronously with left movement axis 2, realize and cut double slit line.
It follows that the setting of position detecting device 21 and control device, which can be realized, automatically switches trimming mode, automatically
Change degree and sewing precision are promoted, and sewing efficiency and sewing quality are promoted naturally.
To realize trimming function, the invention also includes support base 9, main drive rod 10 and right trimming connecting rods 11.Wherein, it supports
Seat 9 is used to support other components, it should be noted that left movable arbor 2 and right movable arbor 1 both pass through support base 9, one end
It is connected in the first side of support base 9 with left trimming connection component 5, second side and corresponding moving knife phase of the other end in support base 9
Even, rationally to utilize support base 9, reduce occupied space.
The first end of main drive rod 10 is hinged with support base 9, and second end is installed on main driving cam 12.Specifically
Ground has been removably installed main connecting plate 13 on support base 9, and one end of main connecting plate 13 is fixed on support base 9 by screw,
The other end of main connecting plate 13 is rotatablely connected by shaft and the first end of main drive rod 10.The second end of main drive rod 10 has
Idler wheel is driven, correspondingly, the main driving cam 12 that intersects the invention also includes central axis with main drive rod 10 and can rotate,
The preferred cylindrical cam of main driving cam 12, the cylindrical cam are equipped with the cam path matched with driving idler wheel.With the current of attached drawing 3
Subject to view, when main driving 12 forward and reverse rotation of cam, cam path drives driving idler wheel correspondingly to the right or to be moved to the left.
The first end of right trimming connecting rod 11 is hinged by right drive shaft and the second end of main drive rod 10, and right trimming connects
The second end of bar 11 is hinged with right trimming drive rod 3 far from one end of left trimming connection component 5, so as to right 11 band of trimming connecting rod
Right trimming drive rod 3 is moved to rotate.In this specific embodiment, right trimming connecting rod 11 is also to pass through shaft with right trimming drive rod 3
Realize rotation connection.It should be noted that the top for playing the shaft of rotation connection in the text is equipped with stop lug,
It is disconnected to prevent the two of rotation connection, guarantees that the two of rotation connection reliably rotates.
Preferably, in this specific embodiment, right trimming connecting rod 11 includes driving respectively with main drive rod 10 and right trimming
The first connector sleeve and the second connector sleeve that bar 3 is rotatablely connected, and the mode being connected through a screw thread are removably attachable to first
Middle brace rod between connector sleeve and the second connector sleeve is mended to adjust the length of right trimming connecting rod 11 in a certain range
The rigging error or mismachining tolerance between associated components are repaid, is conducive to promote adaptability.Certainly, the structure of right trimming connecting rod 11 is not
It is limited to this.
The invention also includes the driving motors for driving main driving cam 12 to rotate, thus for right trimming drive rod 3
Rotation provides power.
The invention also includes right return springs 14, the first end of right return springs 14 is installed on right drive shaft, right
The second end of return springs 14 is installed on right support column set by support base 9, when main drive rod 10 is in the work of driving idler wheel
After turning to target position under, after main driving cam 12 stops operating, work of the main drive rod 10 in right return springs 14
Restored automatically along cam path to initial position with lower.Preferably, right return springs 14 are the common cylinder that both ends have hook
Elasticity, but type is without being limited thereto.
The invention also includes left limit elastic component 15, the first end of left limit elastic component 15 is installed on left trimming drive rod 4,
The second end of left limit elastic component 15 is installed on left support column set by left shuttle frame 7, to connect in any two neighboring left trimming
Left limit elastic component 15 can limit left trimming drive rod 4 and rotate when bar is relative to sliding.In this specific embodiment, left limit bullet
Property the preferred both ends of part 15 there is the common cylinder spring of hook, but type is without being limited thereto.Specifically, the of left limit elastic component 15
One end connect pawl with the third of left trimming drive rod 4 and is connected.It should be noted that the elastic force of left limit elastic component 15 need to be greater than
Frictional resistance between arbitrary neighborhood two left trimming connecting rods, it is left when being slided with guaranteeing that arbitrary neighborhood two left trimming connecting rods are opposite
Limit elastic component 15 does not rotate.
Further to promote reliability, the invention also includes right shuttle frame 16, right stopper posts 17 and left stopper posts 18, right shuttle frame
16 are oppositely arranged with left shuttle frame 7.Right stopper posts 17 are fixedly arranged on right shuttle frame 16.When right trimming drive rod 3 turns to certain angle
Right trimming drive rod 3 bumps against with right stopper posts 17 afterwards, prevents right trimming drive rod 3 because the factors such as inertia force continue to rotate, and guarantees
Rotation angle between right trimming drive rod 3 and left trimming drive rod 4, to enable left trimming connection component 5 reliably band
Left trimming drive rod 4 is moved to rotate.Left stopper posts 18 are fixedly arranged on left shuttle frame 7, so that left stopper posts 18 limit left 4 mistake of trimming drive rod
Cross rotation.Right stopper posts 17 and the preferred connection bolt of left stopper posts 18, but not limited to this.
The invention also includes corresponding with right movable arbor 1 and left movable arbor 2 connected right trimming components 19 and left trimming respectively
Component 20, wherein right trimming component 19 includes that right moving knife 191, right stationary knife 192, right driving leading truck 193 and the driving of right moving knife are slided
Block 194.
Right stationary knife 192 is detachably secured on right shuttle frame 16 by holding screw.Right driving leading truck 193 is fixedly arranged on the right side
On shuttle frame 16, there is the right driving guide groove for accommodating right moving knife driving sliding block 194.One end of right movable arbor 1 passes through right shuttle frame
16, and right movable arbor 1 is equipped with the right driving rolling for driving right moving knife driving sliding block 194 mobile close to one end of right shuttle frame 16
Column, correspondingly, right moving knife driving sliding block 194 are equipped with the right driving mounting slot for accommodating right driving roller.When right movable arbor 1 exists
When being rotated by of right trimming drive rod 3, right driving roller push right moving knife driving sliding block 194 to move along right driving guide groove,
Right moving knife driving sliding block 194 drives right moving knife 191 mobile relative to right stationary knife 192.Right elastic supporting member for supporting optical member 195 is fixed on right shuttle frame
On 16, and right elastic supporting member for supporting optical member 195 and the bottom of right moving knife 191 offset, and right moving knife 191 is enable to protect always with right stationary knife 192
Hold contact condition.In this specific embodiment, right elastic supporting member for supporting optical member 195 is preferably that the bullet on right shuttle frame 16 is fixed in two panels one end
Property sheet metal, but the structure of right elastic supporting member for supporting optical member 195 is without being limited thereto.
To promote versatility, the structure of right trimming component 19 is identical as the structure of left trimming component 20, and details are not described herein.
The working principle of thread cutting mechanism of sewing machine provided by the present invention is as follows:
Single needle bar mode is become from crosspointer bar mode, forward direction stirs rotation driving lever 81, namely stirs rotation driving lever 81 to the left,
It rotates driving lever 81 and drives slide link 83 positive mobile by pivot link 82, slide link 83 drives magnet steel 213 to be moved to mesh
Cursor position, Hall sensor 211 senses that magnet steel 213, Hall sensor 211 send a signal to control device, post legged seam at this time
Machine pedal thread to feed back trimming signal to control device, the electromagnetic coil 611 that control device controls electromagnetic driver 61 obtains electric, electricity
Magnetic core 612 pulls V-type rotating turret 63, and V-type rotating turret 63 drives limit pin shaft 62 from upper limit guide sleeve 641 and lower limit guide sleeve
Abjection in 651, the first left trimming connecting rod 51 and the second left trimming connecting rod 52 can be realized opposite sliding；
Main driving cam 12 rotates forward, and main driving cam 12 drives main drive rod 10 to move to right, and right trimming connecting rod 11 drives
Right trimming drive rod 3 drives right movable arbor 1 to rotate counterclockwise, and right movable arbor 1 drives sliding block 194 to drive right moving knife by right moving knife
191 advance relative to right stationary knife 192, and right moving knife 191 goes out knife hook line；At the same time, right trimming drive rod 3 drives the first left trimming
Connecting rod 51 slides left trimming drive rod 4 relative to the second left trimming connecting rod 52 and is failure to actuate；
Main driving cam 12 stalls, and cam path drives main drive rod 10 to be moved to the left, while right return springs 14 assist
Main drive rod 10 is moved to the left, and main drive rod 10 pulls right trimming connecting rod 11 to move to left, and right trimming drive rod 3 drives right movable arbor 1
It rotates clockwise, right movable arbor 1 drives sliding block 194 that right moving knife 191 is driven to retreat relative to right stationary knife 192 by right moving knife, right
Moving knife 191 is meshed in back off procedure with right stationary knife 192, to cut 191 jointing lines of right moving knife, it is single to be achieved in cutting
Root suture.
Crosspointer bar mode is become from single needle bar mode, reversely stirs rotation driving lever 81, rotation driving lever 81 passes through pivot link
82 drive slide link 83 to move backward, and slide link 83 drives magnet steel 213 to be moved to initial position, and Hall sensor 211 is felt
Magnet steel 213 should be arrived, Hall sensor 211 sends a signal to control device, receives the control device control electromagnetism of trimming signal
611 power loss of electromagnetic coil of actuator 61, electromagnetic core 612 push V-type rotating turret 63, and V-type rotating turret 63 drives limit pin shaft
In 62 insertion upper limit guide sleeves 641 and lower limit guide sleeve 651, the first left trimming connecting rod 51 and the second left trimming connecting rod 52 are connected and are
It is integrated so that right trimming drive rod 3 and left trimming drive rod 4 rotate synchronously；
Main driving cam 12 rotates forward, and cam path drives main drive rod 10 to move right；Main drive rod 10 pushes the right side to cut
Line connecting rod 11 moves to right, and right trimming connecting rod 11 drives right trimming drive rod 3 to rotate counterclockwise, and right movable arbor 1 rotates counterclockwise, right drive
Dynamic roller drives right moving knife driving sliding block 194 to advance along the right driving guide groove of right driving leading truck 193, and right moving knife drives sliding block
194 drive right moving knife 191 to advance relative to right stationary knife 192, and right moving knife 191 is to close to the movement of the direction of dextrorotation shuttle, right moving knife 191
Knife hook line out；At the same time, right trimming drive rod 3 drives drives left trimming drive rod 4 to rotate by left trimming connection component 5,
Left movable arbor 2 rotates counterclockwise, and left movable arbor 2 drives left moving knife relative to left stationary knife advanced in unison, and left moving knife goes out knife hook line；
Main driving cam 12 stalls, and cam path drives main drive rod 10 to be moved to the left, while right return springs 14 assist
Main drive rod 10 resets, and main drive rod 10 pulls right trimming connecting rod 11 to move to left, and right trimming connecting rod 11 drives right trimming drive rod 3 suitable
Hour hands rotation, right trimming drive rod 3 drive right movable arbor 1 to rotate clockwise, and right driving roller drives right moving knife to drive sliding block 194
Right driving guide groove along right driving leading truck 193 retreats, and right moving knife driving sliding block 194 drives right moving knife 191 relative to right stationary knife
192 retreat, and right moving knife 191 is mobile to the direction far from dextrorotation shuttle, and right moving knife 191 is nibbled in back off procedure with right 192 phase of stationary knife
It closes, to cut 191 jointing lines of right moving knife；Right trimming drive rod 3 drives left trimming connection component 5 to act simultaneously, left trimming
Connection component 5 drives left trimming drive rod 4 to rotate clockwise, and left trimming drive rod 4 drives left movable arbor 2 to rotate clockwise, left
Movable arbor 2 drives left moving knife to retreat relative to left stationary knife, and left moving knife is meshed in back off procedure with left stationary knife, to cut a left side
Moving knife institute jointing line is realized and cuts double slit line.
The present invention also provides a kind of sewing machines, including sewing machine body and above-mentioned thread cutting mechanism of sewing machine, due to sewing machine
The promotion of thread cutting mechanism functional reliability reduces the failure rate of thread cutting mechanism of sewing machine, is conducive to shorten the non-productive work time,
Therefore working efficiency is promoted.
Sewing machine provided by the present invention and its thread cutting mechanism are described in detail above, it is used herein specifically
Principle and implementation of the present invention are described for a example, the present invention that the above embodiments are only used to help understand
Method and its core concept；At the same time, for those skilled in the art is being embodied according to the thought of the present invention
There will be changes in mode and application range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of thread cutting mechanism of sewing machine characterized by comprising
Right trimming drive rod (3) for driving right movable arbor (1) to rotate；
Left trimming drive rod (4) for driving left movable arbor (2) to rotate；
The left trimming connection component that both ends are hinged with the right trimming drive rod (3) and the left trimming drive rod (4) respectively
(5)；The left trimming connection component (5) includes at least two left trimming connecting rods being slidably connected；
It is several to be cut set on the junction of the arbitrary neighborhood two left trimming connecting rods, for the two neighboring left side of selectivity restriction
The electromagnetism limit assembly (6) of line rod slide.
2. thread cutting mechanism of sewing machine according to claim 1, which is characterized in that the electromagnetism limit assembly (6) includes:
It is fixedly arranged on the electromagnetic driver (61) of the left trimming connecting rod；
For selectively passing through the limit pin shaft (62) of the junction of the two neighboring left trimming connecting rod；
Lug boss and the left trimming connecting rod where the electromagnetic driver (61) be hinged and both ends respectively with the electromagnetism
Actuator (61) and the limit pin shaft (62) are hinged, for driving the limit pin shaft (62) to cut from the two neighboring left side
The junction of line connecting rod is inserted into or the V-type rotating turret (63) of abjection.
3. thread cutting mechanism of sewing machine according to claim 2, which is characterized in that the left trimming connection component (5) includes
For support respectively the electromagnetic driver (61) the first left trimming connecting rod (51) and with the described first left trimming connecting rod (51)
The left trimming connecting rod (52) of second to be slidably connected, the electromagnetism limit assembly (6) further include:
It is fixedly arranged on the described first left trimming connecting rod (51), for passing through the described first left trimming connecting rod for the limit pin shaft (62)
(51) the first position-limited rack (64), first position-limited rack (64) have the upper limit for guiding the limit pin shaft (62) mobile
Position guide sleeve (641)；
It is fixedly arranged on close described second left trimming connecting rod (52) one end of the described first left trimming connecting rod (51), for supplying the limit
Pin shaft (62) passes through the second position-limited rack (65) of the upper limit guide sleeve (641) partially passed through, second position-limited rack (65)
With connecting with the upper limit guide sleeve (641) with the lower limit guide sleeve for guiding the limit pin shaft (62) to continue to move to
(651)。
4. thread cutting mechanism of sewing machine according to claim 3, which is characterized in that the periphery of the limit pin shaft (62) covers admittedly
Have offset with the upper limit guide sleeve (641), the resilient sleeve (66) for eliminating noise.
5. according to the described in any item thread cutting mechanism of sewing machine of claim 2 to 4, which is characterized in that further include:
For adjusting the slide link (83) of two-shipper needle separation；
Set on the slide link (83), the position detecting device (21) for detecting the slide link (83) position；
It is connected respectively with the position detecting device (21) and the electromagnetic driver (61), for being filled according to the position detection
The signal for setting (21) transmission controls the control device that the electromagnetic driver (61) drives limit pin shaft (62) movement.
6. thread cutting mechanism of sewing machine according to claim 5, which is characterized in that further include:
Support base (9)；
First end is articulated with the support base (9) and second end is installed on the main main drive rod (10) for driving cam (12), described
The second end of main drive rod (10), which has, to be matched with the cam path of main driving cam (12) to drive the main drive rod
(10) the driving idler wheel acted；
First end is hinged by the second end of right drive shaft and the main drive rod (10) and second end and the right trimming
Drive rod (3) is hinged, for driving right trimming drive rod (3) rotation far from described left trimming connection component (5) one end
Right trimming connecting rod (11).
7. thread cutting mechanism of sewing machine according to claim 6, which is characterized in that further include:
First end is installed on the right drive shaft and second end is installed on right support column set by the support base (9), is used for
The right return springs (14) for assisting the main drive rod (10) to automatically reset after main drive rod (10) movement.
8. thread cutting mechanism of sewing machine according to claim 5, which is characterized in that further include:
Left shuttle frame (7) for being passed through for the left movable arbor (2)；
First end is installed on the left trimming drive rod (4) and second end be installed on left support column set by the left shuttle frame (7),
For limiting the left limit of left trimming drive rod (4) rotation when any two neighboring left trimming connecting rod is relative to sliding
Elastic component (15).
9. thread cutting mechanism of sewing machine according to claim 8, which is characterized in that further include:
Right shuttle frame (16) for being passed through for the right movable arbor (1)；
It is fixedly arranged on the right shuttle frame (16), the right stopper posts (17) for limiting right trimming drive rod (3) rotation；
It is fixedly arranged on the left shuttle frame (7), the left stopper posts (18) for limiting left trimming drive rod (4) rotation.
10. a kind of sewing machine, which is characterized in that sewing machine body and claim 1 to 9 are described in any item set on the sewing
The thread cutting mechanism of sewing machine of machine ontology.
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| CN201910150531.1A CN109837661B (en) | 2019-02-28 | 2019-02-28 | Sewing machine and thread trimming mechanism thereof |
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| CN201910150531.1A CN109837661B (en) | 2019-02-28 | 2019-02-28 | Sewing machine and thread trimming mechanism thereof |
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| CN109837661B CN109837661B (en) | 2021-04-27 |
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|---|---|
| CN109837661B (en) | 2021-04-27 |
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