CN109487453A - A kind of double acting knife cutting facility of sewing machine - Google Patents
A kind of double acting knife cutting facility of sewing machine Download PDFInfo
- Publication number
- CN109487453A CN109487453A CN201811510444.4A CN201811510444A CN109487453A CN 109487453 A CN109487453 A CN 109487453A CN 201811510444 A CN201811510444 A CN 201811510444A CN 109487453 A CN109487453 A CN 109487453A
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- China
- Prior art keywords
- moving knife
- knife
- driving
- blade
- sewing machine
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- 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
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The present invention provides a kind of double acting knife cutting facility of sewing machine, the first moving knife and the second moving knife including being all movably mounted with main needle plate, the second blade on the first blade and the second moving knife on first moving knife can be engaged, it further include the first driving source, the second driving source, the first driving assembly and the second driving assembly, first driving source is connected with the first moving knife by the first driving assembly, the first moving knife is driven to move, and second driving source is connected with the second moving knife by the second driving assembly, the second moving knife is driven to move.In the application, the first moving knife and the movement of the second moving knife are respectively driven by two independent driving sources, so that the no linkage of the movement of the first moving knife and the second moving knife between the two can steadily realize the trimming effect of short-term head to have preferable adjustability and controllability.
Description
Technical field
The present invention relates to a kind of sewing machines, more particularly to a kind of double acting knife cutting facility of sewing machine.
Background technique
Currently, client is higher and higher to the end of a thread requirement of clothing, the length of the end of a thread directly affects the beauty of clothing, in addition,
The end of a thread it is too long it is easy exist pull the end of a thread and lead to the hidden danger of loose ends.In order to solve the problems, such as that the end of a thread is too long, clothing factory at present
Common practice is: increasing the process of artificial trimming the end of a thread together, but this method increase the costs of labor of clothing, and reduce
The production efficiency of clothing；Alternatively, some sewing machine producers also improve on thread shearing device of sewing machine, to realize cutting for short-term head
Line effect.In the prior art, there are mainly two types of forms for the cutting facility in sewing machine: single action knife cutting facility and double acting knife trimming
Device.Wherein, single action knife cutting facility is due to the line between the needle falling hole on stationary knife and needle plate there are a certain distance, after trimming
Head length is equal to the distance between stationary knife and needle falling hole and the sum of needle falling hole depth, therefore the end of a thread is still longer.And double acting knife trimming
It has two moving knife to device, such as: disclosed in the Chinese utility model patent specification application No. is 201520727456.8
A kind of sewing machine double acting knife thread cutting mechanism, the double acting knife thread cutting mechanism driven simultaneously using driving source the first moving knife and
Second moving knife, and then realize trimming；But there are following defects for the double acting knife thread cutting mechanism: 1, two moving knife pass through mechanical knot
Structure is connected on same root drive rod, therefore two moving knife are linkage structure, simultaneously operation, there is certain mutual limit between the two
Property；2, the double acting knife thread cutting mechanism is connected by multiple link mechanisms, and cooperation between each components is needed to realize the reality at needle falling hole
Now ideal trimming position, the limit of each components and the movement of each components are flexible, so as to cause the double acting knife thread trimmer
Structure relevance is too strong, and controllability is poor；3, two moving knife move at the same time, and trimming is realized in cooperation, therefore trimming effect is by two moving knife
Influence, thread trimming stability is poor；4, it realizes trimming at needle falling hole, therefore needs to guarantee that two moving knife are each in return stroke
It meets, be engaged at needle falling hole from cutting edge, it is also necessary to guarantee that the limit progressive position of the second moving knife is located at the underface of needle falling hole,
But since the movement of two moving knife is there are relevance, adjusts and realize that there are biggish difficulty for above-mentioned ideal trimming position, thus
It is not highly desirable for leading to trimming effect.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of adjustability and controllabilities all
The double acting knife cutting facility of preferable sewing machine.
To achieve the above object, the present invention provides a kind of double acting knife cutting facility of sewing machine, including is all movably mounted with
The second blade energy on the first blade and the second moving knife on the first moving knife and the second moving knife of main needle plate, first moving knife
Enough occlusions, further include the first driving source, the second driving source, the first driving assembly and the second driving assembly, first driving source
It is connected by the first driving assembly with the first moving knife, the first moving knife is driven to move, second driving source passes through the second driving group
Part is connected with the second moving knife, the second moving knife is driven to move.
Further, the double acting knife cutting facility of the sewing machine further includes the secondary needle plate for being installed on main needle plate, the pair needle
There is needle falling hole up and down on plate, second on the pair needle plate, the first blade and the second moving knife on the first moving knife
Blade is set gradually from top to bottom in the up-down direction；When trimming, on the first blade and the second moving knife on first moving knife
The second blade can be engaged at needle falling hole.
Further, the double acting knife cutting facility of the sewing machine further includes the secondary needle plate for being installed on main needle plate, the pair needle
There is needle falling hole up and down on plate；Under original state, on first moving knife on the first blade and secondary needle plate needle falling hole it
Between distance be 1.5-2.5mm.
Further, under original state, the distance between the first blade and needle falling hole on secondary needle plate on first moving knife
For 2.2mm.
Further, when trimming, the movement of second driving source makes the second moving knife prior to the movement of the first driving source
Move the movement prior to the first moving knife.
Further, first driving source has moveable first driving portion, and first driving assembly includes the
One connecting rod and second connecting rod, one end of the first connecting rod is connected with one end of the first driving portion, the other end and second connecting rod
One end is hinged, and the other end of the second connecting rod and one end of the first moving knife are hinged, and first blade is located at the first moving knife
The other end, first moving knife are articulated with main needle plate.
Further, the other end of first driving portion, which is fixedly connected with, goes out knife limit outside the first driving source
Block, the knife limited block out can be abutted against with the shell of the first driving source.
Further, time knife limited block being threaded on the first connecting rod outside the first driving source, it is described
Returning knife limited block can abut against with the shell of the first driving source.
Further, first driving assembly further includes the pulling block for being articulated with second connecting rod, moves along the first driving portion
Direction extend reset tension spring and be fixed on the first driving source shell mounting plate, the reset tension spring both ends difference
It is connected with pulling block and mounting plate.
Further, second driving assembly includes rotate driving frame, third connecting rod and fourth link, and described second is dynamic
Knife and rotate driving frame are all articulated with main needle plate, and the rotate driving frame is driven by the second driving source and swung, the third connecting rod
It is fixed on rotate driving frame, the both ends of the fourth link are hinged with third connecting rod and the second moving knife respectively.
Further, the rotate driving frame is mutually fixed with third connecting rod by fixing screws, on the rotate driving frame
Waist type adjustment hole is offered, the fixing screws are threaded through waist type adjustment hole.
Further, second moving knife include the separated time portion being oppositely arranged and hooking portion and be connected to separated time portion and
Slip portion between hooking portion, the second blade neighbour in the intersection in separated time portion and slip portion, second moving knife towards
Appearance wire casing is offered on the upper surface of first moving knife, described one end for holding wire casing extends at the second blade, the other end extends to
At hooking portion.
As described above, the double acting knife cutting facility of sewing machine of the present invention, has the advantages that
In the application, the first moving knife is respectively driven by two independent driving sources and the second moving knife moves, so that first is dynamic
The no linkage of the movement of knife and the second moving knife between the two can be stablized to have preferable adjustability and controllability
The trimming effect of ground realization short-term head.
Detailed description of the invention
Fig. 1 to Fig. 3 is structural schematic diagram of the double acting knife cutting facility of sewing machine under different perspectives in the application.
(wherein, Fig. 3 is bottom view and is in original state.)
Fig. 4 is the structural schematic diagram of the first driving assembly in the application.
Fig. 5 is the structural schematic diagram that bogie is rotated in the application.
Fig. 6 is the structural schematic diagram of the second moving knife in the application.
The occlusion schematic diagram of first moving knife and the second moving knife when Fig. 7 is trimming.
Component label instructions
1 main needle plate
2 first moving knife
21 first blades
3 second moving knife
31 second blades
32 separated time portions
33 hooking portions
34 slip portions
35 hold wire casing
4 first driving sources
5 secondary needle plates
51 needle falling holes
6 first connecting rods
7 second connecting rods
8 go out knife limited block
9 times knife limited blocks
10 pulling blocks
11 reset tension springs
12 mounting plates
13 rotate driving framves
131 waist type adjustment holes
14 third connecting rods
15 fourth links
16 fixing screws
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
It should be clear that structure, ratio, size etc. that this specification attached drawing is drawn, only to cooperate specification revealed interior
Hold, so that those skilled in the art understands and reads, is not intended to limit the invention enforceable qualifications, therefore does not have skill
Essential meaning in art, the modification of any structure, the change of proportionate relationship or the adjustment of size can be produced not influencing the present invention
Under raw effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents can cover.Together
When, cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, be merely convenient to chat
It states clearly, rather than to limit the scope of the invention, relativeness is altered or modified, and is changing technology without essence
It inside holds, when being also considered as the enforceable scope of the present invention.
In following embodiment, all directions are defined as follows: the axial direction of main shaft in sewing machine being defined as left and right directions, and main
The direction of axis towards head be left direction, towards the direction of tail be right direction.Therefore, in view shown in Fig. 3, a left side for paper
Side and right side are respectively left direction and right direction, and the back side and front of paper are respectively upper direction and lower direction, the upside of paper
It is respectively rear direction and front direction with downside.
The application provides a kind of double acting knife cutting facility of sewing machine, is mounted in sewing machine, for after sewing
Suture is cut.As shown in Figure 1 to Figure 3, the double acting knife cutting facility of sewing machine includes all be movably mounted with main needle plate 1
One moving knife 2 and the second moving knife 3, the first driving source 4, the second driving source, the first driving assembly and the second driving assembly, the first moving knife
The second blade 31 on the first blade 21 and the second moving knife 3 on 2 can be engaged, and the first driving source 4 passes through the first driving assembly
It is connected with the first moving knife 2, the first moving knife 2 is driven to move, the second driving source is connected by the second driving assembly with the second moving knife 3,
The second moving knife 3 is driven to move.In the application, the first moving knife 2 is respectively driven by two independent driving sources and the second moving knife 3 is transported
It is dynamic, so that the first moving knife 2 and the second moving knife 3 no linkage of movement between the two, being completely independent, and movement between the two
Can have certain timing so that this application involves the double acting knife cutting facility of sewing machine have preferable adjustability and
Controllability steadily can set place's trimming in ideal cutting position, to steadily realize the trimming effect of short-term head.
As shown in Figure 1 to Figure 3, the double acting knife cutting facility of sewing machine further includes the secondary needle plate 5 for being installed on main needle plate 1, secondary needle
There is needle falling hole 51 up and down, on the first blade 21 and the second moving knife 3 on secondary needle plate 5, the first moving knife 2 on plate 5
Second blade 31 is set gradually from top to bottom in the up-down direction；When trimming, the first blade 21 and second on the first moving knife 2 is dynamic
The second blade 31 on knife 3 can be engaged at needle falling hole 51, therefore ideal cutting position is set to 51 center of needle falling hole in the application,
So as to effectively shorten the stub after trimming.
Further, the first moving knife 2 and the second moving knife 3 are all articulated with main needle plate 1 by the axial screw extended up and down, therefore
First moving knife 2 can rotate around axial screw, have a fixed swing pivot O1, the second moving knife 3 can also rotate around axial screw,
Also there is fixed swing pivot O2.First driving source 4 has the first driving portion that can be moved left and right, therefore the first driving source 4 is optional
With cylinder, electromagnet, linear motor etc.；The first driving source 4 is electromagnet in following embodiments.
It is connected to the preferred structure of the first driving assembly between the first driving source 4 and the first moving knife 2 are as follows: as shown in Figure 1 to Figure 4
Shown, the first driving assembly includes first connecting rod 6 and second connecting rod 7, the right end phase of the left end of first connecting rod 6 and the first driving portion
Even, the left end of the right end and second connecting rod 7 of first connecting rod 6 is hinged, and the right end of second connecting rod 7 and the rear end of the first moving knife 2 are hinged,
First blade 21 is located at the front end of the first moving knife 2, and the axial screw for hinged first moving knife 2 and main needle plate 1 is connected to first
The middle position of moving knife 2.First driving assembly further includes the pulling block 10 for being articulated with second connecting rod 7, moves along the first driving portion
The reset tension spring 11 of direction or so extension and the mounting plate 12 for being fixed on shell right end in the first driving source 4, reset tension spring 11
Left and right ends be connected respectively with pulling block 10 and mounting plate 12.When the first driving source 4 is powered, the first driving portion moves right,
First connecting rod 6, second connecting rod 7 and pulling block 10 is driven to move right together, reset tension spring 11 is further stretched, while passing through the
One connecting rod 6 and second connecting rod 7 drive the first moving knife 2 to fix swing pivot O1 around it and swing, the first moving knife in view shown in Fig. 3
2 around fixed swing pivot O1 clockwise oscillation, and then the first blade 21 of 2 front end of the first moving knife is made to be rocked to secondary needle plate 5 to the left
On needle falling hole 51 center position.After the power-off of the first driving source 4, make pulling block 10 to the left under the action of reset tension spring 11
It is mobile to reset, and then make first connecting rod 6, second connecting rod 7, the first driving portion and each Self-resetting of the first moving knife 2.In addition, this implementation
In example, first connecting rod 6 is a multi-diameter shaft, is all passed through between first connecting rod 6 and second connecting rod 7, between second connecting rod 7 and pulling block 10
Screw, nut assembly are hinged.
Further, as shown in Figures 1 to 4, the left end of the first driving portion is fixedly connected with positioned at 4 left of the first driving source
Side goes out knife limited block 8, can be used and is threadedly coupled between the first driving portion and knife limited block 8 out；In the initial state, knife limits out
There is a distance between position block 8 and the shell of the first driving source 4；After in trimming, the first driving source 4 is powered, the first driving portion band
Dynamic knife limited block 8 out moves right together, until knife limited block 8 and the shell of the first driving source 4 abut against out.Therefore, knife out
Limited block 8 limits the knife movement travel out of the first moving knife 2, goes out knife limited block 8 and the first driving source 4 under original state by adjusting
Adjustable the first moving knife of section 2 of the distance between shell the size for going out knife movement travel；Knife limited block 8 close to first out
The shell of driving source 4, then the distance between knife limited block 8 and the shell of the first driving source 4 are smaller out, and the first moving knife 2 goes out knife
Movement travel reduces, so that trimming position is away from the center of needle falling hole 51 on secondary needle plate 5；Knife limited block 8 is away from first out
The shell of driving source 4, then the distance between knife limited block 8 and the shell of the first driving source 4 are larger out, and the first moving knife 2 goes out knife
Movement travel increases, so that cutting position rests against the center for being bordering on needle falling hole 51 on secondary needle plate 5；Go out knife under original state by adjusting
The distance between limited block 8 and the shell of the first driving source 4 can make cutting position setting in the center of needle falling hole 51, realize ideal
Trimming position.It is threaded on first connecting rod 6 and returns knife limited block 9 positioned at 4 right side of the first driving source, return knife limited block
9 optional nuts；In the initial state, when the first driving source 4 is in off-position, knife limited block 9 and the first driving source 4 are returned
Shell abuts against.Therefore, it during trimming, after the first driving source 4 is powered, returns knife limited block 9 and moves right with first connecting rod 6
Move, be away from the shell of the first driving source 4；First moving knife 2 and the second moving knife 3 have no progeny suture scissors, the power-off of the first driving source 4,
It is moved to the left first connecting rod 6 under the action of reset tension spring 11, until returning the shell phase of knife limited block 9 and the first driving source 4
It abuts.Therefore, time knife movement travel that knife limited block 9 limits the first moving knife 2 is returned, also determines the initial position of the first moving knife 2,
Rotating back to knife limited block 9 can be adjusted back left-right position of the knife limited block 9 on first connecting rod 6, and then adjust the first driving source 4
Energized state the distance between knife limited block 9 and the shell of the first driving source 4 size next time adjusts the first moving knife 2 with this
Return the size of knife movement travel；Return shell of the knife limited block 9 close to the first driving source 4, time knife movement travel of the first moving knife 2
Reduce；The shell that knife limited block 9 is away from the first driving source 4 is returned, the knife movement travel of returning of the first moving knife 2 increases.
It is connected to the preferred structure of the second driving assembly between the second driving source and the second moving knife 3 are as follows: such as Fig. 1 to Fig. 3
Shown, the second driving assembly includes rotate driving frame 13, third connecting rod 14 and fourth link 15, and rotate driving frame 13 passes through up and down
The axial screw of extension is articulated with main needle plate 1, has fixed swing pivot O3, and rotate driving frame 13 is driven by the second driving source and put
Dynamic, third connecting rod 14 is fixed on rotate driving frame 13, and the right end and third connecting rod 14 of fourth link 15 are hinged, fourth link 15
Part is hinged rearward for left end and the centre of the second moving knife 3, and the axial screw for hinged second moving knife 3 and main needle plate 1 is connected to
At the front position of second moving knife 3.Motor can be selected in second driving source, can drive 13 reciprocally swinging of rotate driving frame；With Fig. 3
Shown in viewing angles observation, when the second driving source drive 13 clockwise oscillation of rotate driving frame when, rotate driving frame 13 passes through
Third connecting rod 14 and fourth link 15 drive 3 counter-clockwise swing of the second moving knife；When the second driving source driving rotate driving frame 13 is inverse
When hour hands are swung, rotate driving frame 13 drives 3 clockwise oscillation of the second moving knife by third connecting rod 14 and fourth link 15.Rotation
Bogie 13 is mutually fixed with third connecting rod 14 by fixing screws 16；As shown in figure 5, offering waist type tune on rotate driving frame 13
Knothole 131；Fixing screws 16 are threaded through waist type adjustment hole 131；Third connecting rod 14 is adjusted by waist type adjustment hole 131 to be fixed on
The position of rotate driving frame 13, and then adjust the movement travel of the second moving knife 3.
In the application, the second moving knife 3 is used for separated time, hooking and trimming；Therefore, as shown in fig. 6, the second moving knife 3 includes
The left and right separated time portion 32 being oppositely arranged and hooking portion 33 and the slip portion 34 being connected between separated time portion 32 and hooking portion 33,
Separated time portion 32 is one section of recessed arc section to the right, and hooking portion 33 is one section of recessed arc section to the left, and slip portion 34 is one section
The junction of the junction in rearwardly projecting arc section, separated time portion 32 and slip portion 34, hooking portion 33 and slip portion 34 is all formed
There is point, 31 neighbour of the second blade is in the intersection in separated time portion 32 and slip portion 34；In addition, the second moving knife 3 is dynamic towards first
It is offered on the upper surface of knife 2 and holds wire casing 35, one end of appearance wire casing 35 extends at the second blade 31, the other end extends to hooking
At portion 33.
More preferably, as shown in figure 3, under original state, that is, when being not carried out trimming action, the first blade 21 on the first moving knife 2
Not at the needle falling hole 51 on secondary needle plate 5 but it is slightly away from needle falling hole 51；In the present embodiment, the first blade on the first moving knife 2
The distance between 21 and needle falling hole 51 on secondary needle plate 5 are 1.5-2.5mm, preferred distance 2.2mm；It is dynamic that the structure is conducive to second
Knife 3 can preferably complete separated time movement, avoid surprisingly cutting the suture for not needing to cut, and then guarantee separated time quality.Base
In this, when trimming, the movement of the second driving source keeps the movement of the second moving knife 3 dynamic prior to first prior to the movement of the first driving source 4
The movement of knife 2；Therefore, the second moving knife 3 is driven first to move by the second driving source when trimming, the second moving knife 3 first carries out separated time movement,
It is acted to separated time and completes or also drive the first moving knife 2 to move during execution, then by the first driving source 4, make the first moving knife 2
On the first blade 21 move to the center position of needle falling hole 51.
In conclusion this application involves the double acting knife cutting facility of sewing machine working principle are as follows:
Under original state, as shown in figure 3, first blade 21 is slightly away from needle falling hole 51, is located at needle falling hole on the first moving knife 2
51 right side, the second blade 31 on the second moving knife 3 are not engaged with the first blade 21 on the first moving knife 2, the second blade 31
Positioned at the right side of the first blade 21.
After the sewing of last needle, eedle back stitching, the second driving source movement drives rotate driving frame 13 to fix around it
Swing pivot O3 clockwise oscillation, then rotate driving frame 13 by third connecting rod 14 and fourth link 15 drive the second moving knife 3 around
It is fixed swing pivot O2 counter-clockwise swing namely the second moving knife 3 and swings certain angle to left front, point on the second moving knife 3
Line portion 32 completes separated time movement, does not need the suture cut and is put at 32 separation of separated time portion, with separated time portion 32 to left front
Dynamic, the suture for needing to cut slides into hooking portion 33 along slip portion 34.
After the completion of the movement of the separated time of the second moving knife 3 or during the second moving knife 3 executes separated time movement, first is driven
Dynamic source 4 is powered, and drives the first moving knife 2 to fix swing pivot O1 clockwise oscillation around it by first connecting rod 6 and second connecting rod 7,
First moving knife 2 turns over certain angle, until knife limited block 8 and the shell of the first driving source 4 abut against out；At this point, the first moving knife 2
First blade 21 of front end is rocked to the center position of the needle falling hole 51 on secondary needle plate 5 to the left.
Second driving source counteragent, driving rotate driving frame 13 are fixed swing pivot O3 counter-clockwise swing around it, are then turned
Dynamic bogie 13 drives the second moving knife 3 to fix the swing pivot O2 inverse time along pendulum around it by third connecting rod 14 and fourth link 15
Dynamic namely the second moving knife 3 swings certain angle to right back, carries out backhaul action, slides into the return stroke of the second moving knife 3
Suture in hooking portion 33 is collapsed into the appearance wire casing 35 on 3 upper surface of the second moving knife；When the second blade 31 on the second moving knife 3
The center that is moved at needle falling hole 51, when being engaged with the first blade 21 on the first moving knife 2, as shown in fig. 7, by suture scissors
It is disconnected, realize trimming action.Therefore, setting in the center of the needle falling hole 51 on secondary needle plate 5, trimming finishes the cutting position in the application
Afterwards, the second moving knife 3 is reset to initial position.
After trimming, in the continuation return stroke of the second moving knife 3 or after the second moving knife 3 has resetted, the first driving source 4
Power-off, first moving knife 2 resets under the action of reset tension spring 11, and drives first connecting rod 6, second connecting rod 7 and pulling block 10 each
Self-resetting.After trimming action, next trimming order is waited.
This application involves the double acting knife cutting facility of sewing machine have it is following a little:
1, the first moving knife 2 and the second moving knife 3 are respectively driven by two independent driving sources, the movement of driving source can be by automatically controlled
Control can more easily adjust the actuation time of the first moving knife 2 and the second moving knife 3 by the program in automatically controlled.Meanwhile the
The initial position of one moving knife 2 and trimming position are adjusted by backhaul limited block and out knife limited block 8 respectively, thus at automatically controlled aspect and
Mechanical aspects all have preferable adjustability.
2, can steadily realize and realize trimming in the center position of needle falling hole 51, the end of a thread after not only making trimming compared with
It is short, while the length for reserving line in next sewing on pin hole is also shortened, this is formed in seam when also in a disguised form having shortened next sewing
The length of initial the end of a thread on material, therefore can steadily realize initial the end of a thread and sewing finishing when sewing starts when, remains the end of a thread all
Short effect.
3, overall structure is simple, at low cost, and occupied space is also few.
So the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (12)
1. a kind of double acting knife cutting facility of sewing machine, the first moving knife (2) and including being all movably mounted with main needle plate (1)
Two moving knife (3), the second blade (31) on the first blade (21) and the second moving knife (3) on first moving knife (2) can be stung
It closes, it is characterised in that: it further include the first driving source (4), the second driving source, the first driving assembly and the second driving assembly, it is described
First driving source (4) is connected with the first moving knife (2) by the first driving assembly, the first moving knife (2) is driven to move, and described second drives
Dynamic source is connected with the second moving knife (3) by the second driving assembly, the second moving knife (3) is driven to move.
2. the double acting knife cutting facility of sewing machine according to claim 1, it is characterised in that: further include being installed on main needle plate
(1) secondary needle plate (5) has needle falling hole (51) up and down, the pair needle plate (5), the first moving knife on pair needle plate (5)
(2) the second blade (31) on the first blade (21) and the second moving knife (3) on is successively set from top to bottom in the up-down direction
It sets；When trimming, the second blade (31) on the first blade (21) and the second moving knife (3) on first moving knife (2) can be
It is engaged at needle falling hole (51).
3. the double acting knife cutting facility of sewing machine according to claim 1, it is characterised in that: further include being installed on main needle plate
(1) secondary needle plate (5) has needle falling hole (51) up and down on pair needle plate (5)；Under original state, described first is dynamic
The distance between the first blade (21) and needle falling hole (51) on secondary needle plate (5) are 1.5-2.5mm on knife (2).
4. the double acting knife cutting facility of sewing machine according to claim 3, it is characterised in that: under original state, described first
The distance between the first blade (21) and needle falling hole (51) on secondary needle plate (5) are 2.2mm on moving knife (2).
5. the double acting knife cutting facility of sewing machine according to claim 3, it is characterised in that: when trimming, second driving
The movement in source makes the movement of the second moving knife (3) prior to the movement of the first moving knife (2) prior to the movement of the first driving source (4).
6. the double acting knife cutting facility of sewing machine according to claim 1, it is characterised in that: the first driving source (4) tool
There is moveable first driving portion, first driving assembly includes first connecting rod (6) and second connecting rod (7), and described first connects
One end of bar (6) is connected with one end of the first driving portion, one end of the other end and second connecting rod (7) is hinged, the second connecting rod
(7) the other end and the one end of the first moving knife (2) are hinged, and first blade (21) is located at the other end of the first moving knife (2), institute
It states the first moving knife (2) and is articulated with main needle plate (1).
7. the double acting knife cutting facility of sewing machine according to claim 6, it is characterised in that: first driving portion it is another
End, which is fixedly connected with, goes out knife limited block (8) positioned at the first driving source (4) outside, and described knife limited block (8) can be with first out
The shell of driving source (4) abuts against.
8. the double acting knife cutting facility of sewing machine according to claim 6, it is characterised in that: spiral shell on the first connecting rod (6)
Line is connected with time knife limited block (9) external positioned at the first driving source (4), and described time knife limited block (9) can be with the first driving
The shell in source (4) abuts against.
9. the double acting knife cutting facility of sewing machine according to claim 6, it is characterised in that: first driving assembly also wraps
Include the pulling block (10), the reset tension spring (11) along the extension of the first driving portion moving direction and fixation for being articulated with second connecting rod (7)
In the mounting plate (12) of the shell of the first driving source (4), the both ends of the reset tension spring (11) respectively with pulling block (10) and installation
Plate (12) is connected.
10. the double acting knife cutting facility of sewing machine according to claim 1, it is characterised in that: the second driving assembly packet
Rotate driving frame (13), third connecting rod (14) and fourth link (15) are included, second moving knife (3) and rotate driving frame (13) are all
It is articulated with main needle plate (1), the rotate driving frame (13) is driven by the second driving source and swung, and the third connecting rod (14) is fixed on
Rotate driving frame (13), the both ends of the fourth link (15) are hinged with third connecting rod (14) and the second moving knife (3) respectively.
11. the double acting knife cutting facility of sewing machine according to claim 10, it is characterised in that: the rotate driving frame (13)
It is mutually fixed with third connecting rod (14) by fixing screws (16), offers waist type adjustment hole on the rotate driving frame (13)
(131), the fixing screws (16) are threaded through waist type adjustment hole (131).
12. the double acting knife cutting facility of sewing machine according to claim 1, it is characterised in that: second moving knife (3) includes
The separated time portion (32) being oppositely arranged and hooking portion (33) and the slip portion being connected between separated time portion (32) and hooking portion (33)
(34), the second blade (31) neighbour is in the intersection of separated time portion (32) and slip portion (34), second moving knife (3) towards
It is offered on the upper surface of first moving knife (2) and holds wire casing (35), described one end for holding wire casing (35) extends to the second blade (31)
Place, the other end extend at hooking portion (33).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811510444.4A CN109487453B (en) | 2018-12-11 | 2018-12-11 | Double-moving-knife thread shearing device of sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811510444.4A CN109487453B (en) | 2018-12-11 | 2018-12-11 | Double-moving-knife thread shearing device of sewing machine |
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| CN109487453A true CN109487453A (en) | 2019-03-19 |
| CN109487453B CN109487453B (en) | 2020-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868574A (en) * | 2019-04-09 | 2019-06-11 | 拓卡奔马机电科技有限公司 | A kind of double acting knife cutting facility of sewing machine and method |
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| CN107022856A (en) * | 2017-06-15 | 2017-08-08 | 浙江美机缝纫机有限公司 | The driving of sewing machine and thread cutting mechanism |
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| JPS63272398A (en) * | 1987-04-30 | 1988-11-09 | 三菱電機株式会社 | Sewing machine driving apparatus |
| CN203295810U (en) * | 2013-06-06 | 2013-11-20 | 薛保运 | Circular cutter trimming computer sewing machine movable cutter driving device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109868574A (en) * | 2019-04-09 | 2019-06-11 | 拓卡奔马机电科技有限公司 | A kind of double acting knife cutting facility of sewing machine and method |
| CN109868574B (en) * | 2019-04-09 | 2024-03-01 | 拓卡奔马机电科技有限公司 | Double-acting knife thread cutting device and method for sewing machine |
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| Publication number | Publication date |
|---|---|
| CN109487453B (en) | 2020-12-29 |
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