CN207047496U - A kind of cutter structure of sewing machine - Google Patents

Abstract

The utility model provides a kind of cutter structure of sewing machine, belongs to sewing machine technique field.It solves the problems, such as the trimming speed and the trimming quality that how to improve cloth.There is the working face for being used for placing cloth on this sewing machine, this cutter structure includes moving knife, tool fixing frame, stationary knife bar, the stationary knife being fixed on stationary knife bar, actuator one is provided with tool fixing frame, actuator one can drive the movement of stationary knife bar stationary knife is in close to or away from the position of working face, when stationary knife is in close to the position of working face, moving knife does shearing motion.The spacing size between moving knife and stationary knife in this cutter structure can adjust, in design certain material space is put without being reserved between stationary knife and moving knife, the design runlength of moving knife shear action is so allowd to greatly reduce, so as to substantially increase the trimming speed to cloth, and the raising of trimming speed enables cloth trimming more continuous neat, and then improve the trimming quality of cloth.

Description

A kind of cutter structure of sewing machine

Technical field

The utility model belongs to sewing machine technique field, is related to a kind of cutter structure of sewing machine.

Background technology

Sewing machine is with one or more sewing thread, and one or more stitchings are formed on sewing, make one or more layers seam The machine that material interweaves or united by a seam.Fabric and leather, plastics, the paper such as function of sewing sewing cotton, fiber crops, silk, hair, staple fibre Deng product, the stitching neat appearance stitched out, it is smooth firmly, sewing velocity is fast, easy to use.The work(that sewing machine typically only sutures Can, but the fabric sutured also needs to shear it sometimes.Wherein, the cutter mechanism of sewing machine is used for into sewing machine In the mechanism cut of sewing.

Such as Chinese patent【Application number：201410488599.8；Application publication number：CN104213342A】Disclose a kind of seam Thread while the mechanism of trimming free to rotate, including trimming mechanism, the power take-off mechanism of driving trimming mechanism work, in trimming The transmission mechanism that the power in drive mechanism is transferred to trimming mechanism is provided between mechanism and drive mechanism, drives bead cutter Structure all the time towards sewing direction of feed rotary drive mechanism.The trimming mechanism includes moving along shank on the inside of eedle Moving knife that direction moves up and down, on the inside of the eedle the static stationary knife of relative moving knife, be fixed together with stationary knife and sewing played The presser feet of pressing effect, for fixing the fixation loop bar of stationary knife and presser feet, stationary knife is embedded in fixed loop bar groove simultaneously and pressure Pin is fixed on fixed loop bar by fixing screws, and the stationary knife that moving knife can be relatively fixed on above-mentioned fixed loop bar slides up and down, Apply trimming operation to it with the continuous feeding of sewing；The fixation loop bar that rotary drive mechanism driving is fixedly connected with it, makes The rotation of stationary knife, moving knife and presser feet that loop bar is fixed together must be fixed, so as to realize the knife edge of above-mentioned moving knife and stationary knife all the time The eedle is followed to be moved and against sewing direction of feed along complexity suture figure.

But there is following defect in the above-mentioned mechanism for freely rotating trimming：Because above-mentioned stationary knife and moving knife are arranged on simultaneously On fixed loop bar, driven by fixed loop bar and rotated together, and stationary knife is fixed on fixed loop bar, that is to say, that stationary knife and moving knife Between maximum spacing range be fixed, and in order to realize the excision of different-thickness cloth, in design, it is necessary in stationary knife and Certain material space of putting is reserved between moving knife, so resulting in the cutting stroke of moving knife must design bigger, cause It is slow to state the shear rate of mechanism, especially when cutting arc-shaped edges, shear action is not fast enough, easily causes clipped cut, influences Trimming quality；Meanwhile said mechanism is arranged on sewing machine arm, its stability is not good enough, causes moving knife and stationary knife shearing It is affected by vibration and cause shearing quality to decline in journey.

The content of the invention

The purpose of this utility model is above mentioned problem be present for existing technology, it is proposed that a kind of cutting knife knot of sewing machine Structure, the technical problem that the utility model solves is how to improve the trimming speed and trimming quality of cloth.

The purpose of this utility model can be realized by following technical proposal：A kind of cutter structure of sewing machine, the seam Threading has the working face for being used for placing cloth on machine, and the cutter structure includes moving knife, tool fixing frame, stationary knife bar, is fixed on stationary knife Stationary knife on bar, it is characterised in that actuator one is provided with the tool fixing frame, the actuator one can drive stationary knife bar to move Dynamic stationary knife is in position close or away from working face, when stationary knife is in close to the position of working face, the moving knife is done Shearing motion.

The cloth trimming process of the cutter structure of this sewing machine is as follows：First, stationary knife is controlled away from dynamic by actuator one Knife, the spacing between stationary knife and moving knife is become big, to place cloth on the working face between stationary knife and moving knife, discharge cloth Afterwards, then by actuator one stationary knife is controlled close to moving knife until entering the cutting stroke of moving knife, now stationary knife is in the axial direction no longer Mobile, then moving knife carries out shear action；It was found from the shear history of above-mentioned cloth：Being different from stationary knife in the prior art can not transport Dynamic, the stationary knife in the cutter structure of this sewing machine can move；Particularly by design driven part one, the energy of actuator one The movement of stationary knife bar is enough driven stationary knife is in close to or away from the position of working face, so that between moving knife and stationary knife It can be adjusted away from size, when not putting cloth, stationary knife is away from working face, and when discharging cloth, stationary knife close to working face and can press On cloth, then in design, just certain put material space without being reserved between stationary knife and moving knife, so that moving knife is cut Cutting the design runlength of action can greatly reduce, for example, both for the cloth of 1 millimeters thick, in the prior art due to stationary knife not The relative moving knife of energy moves up and down, in order to ensure that cloth can put in, therefore the shear design stroke of moving knife of the prior art It has to be larger than 1 millimeter, such as 1.5 millimeters；And because stationary knife can move up and down with respect to moving knife in the application, without worrying cloth It is not placed into, the design runlength of the application moving knife can just be designed as 1 millimeter, so as to substantially increase the trimming speed to cloth Degree, and the raising of trimming speed enables cloth trimming more continuous neat, and then improve the trimming quality of cloth.

In the cutter structure of above-mentioned sewing machine, stationary knife bar sliding sleeve, the stationary knife are rotatably connected in the tool fixing frame Bar is located in stationary knife bar sliding sleeve and circumferentially positioned with stationary knife bar sliding sleeve, and the actuator one can drive stationary knife bar along stationary knife Bar sliding sleeve opposite working moves up and down.By designing the mobile offer guiding that stationary knife bar sliding sleeve is stationary knife bar, so that drive Moving part one can more be stablized when driving the movement of stationary knife bar so that stationary knife is maintained at the optimum position coordinated with moving knife, so Advantageously ensure that shearing quality when moving knife and stationary knife coordinate.

In the cutter structure of above-mentioned sewing machine, the stationary knife bar is slidably connected with stationary knife bar sliding sleeve and had on stationary knife bar There is the chute opened up vertically, sliding pin is equipped with the outer wall of the stationary knife bar sliding sleeve, the sliding pin passes through stationary knife bar sliding sleeve Inwall and penetrating into the chute is connected with the slide.Designed more than so that stationary knife bar and stationary knife bar sliding sleeve It can be slid axially again while circumferentially positioned, so that stationary knife bar, which can be realized, rotates and move up and down two frees degree Action；Meanwhile with the stability for being designed to ensure stationary knife bar and the cooperation of stationary knife bar sliding sleeve of upper hopper chute, sliding pin, it is so favourable In the trimming quality for improving cloth.

In the cutter structure of above-mentioned sewing machine, the actuator one is drive cylinder, is fixed with the stationary knife bar Drive link, the piston rod of the drive cylinder are connected in drive link, are set between the drive link and stationary knife bar sliding sleeve Spring one is equipped with, the spring one is set on stationary knife bar and both ends are born against in drive link and stationary knife bar sliding sleeve.It is logical The design of above spring one is crossed, when moving knife contacts with stationary knife and does shear action, above-mentioned spring one can play buffer shock-absorbing Effect, be so advantageous to improve the stability of moving knife and stationary knife in shearing, so as to be advantageous to improve the trimming quality of cloth；Together When, the design of above-mentioned spring one also can provide pretightning force for drive link, for preventing drive link from loosening.In addition, Above-mentioned actuator one can use oil cylinder or motor to substitute.

In the cutter structure of above-mentioned sewing machine, axle is also fixed with the stationary knife bar between the drive link and stationary knife Set, is provided with spring two, the spring two is set on stationary knife bar and both ends are born against between the axle sleeve and drive link On axle sleeve and drive link.Pass through the design of above spring two, when moving knife contacts with stationary knife and does shear action, above-mentioned spring Two can play a part of buffer shock-absorbing, so be advantageous to improve the stability of moving knife and stationary knife in shearing, so as to be advantageous to Improve the trimming quality of cloth；Meanwhile the design of above-mentioned spring two also can provide pretightning force for drive link, for preventing from driving Dynamic connecting rod loosens.

In the cutter structure of above-mentioned sewing machine, the actuator two is stationary knife electric rotating machine, the stationary knife bar sliding sleeve It is rotatablely connected by bearing and tool fixing frame, one end that the stationary knife bar sliding sleeve passes tool fixing frame is fixed with timing belt tooth and timing belt Back-up ring, the stationary knife electric rotating machine are fixed in tool fixing frame and drive stationary knife bar sliding sleeve to rotate by timing belt.Stationary knife electric rotating Machine by with upper type come drive stationary knife bar sliding sleeve rotate, depending on knife bar and stationary knife bar sliding sleeve it is circumferentially positioned so that stationary knife Electric rotating machine can drive stationary knife bar to rotate；Meanwhile the design of above-mentioned timing belt tooth and timing belt, advantageously ensure that stationary knife bar revolves The stability turned, is so advantageous to improve follow-up trimming quality.In addition, above-mentioned actuator two can use oil cylinder or cylinder to replace Generation.

In the cutter structure of above-mentioned sewing machine, when stationary knife is in the position away from working face, the moving knife is also located In the position away from working face.Because this stationary knife can move, when needing to place cloth, stationary knife and moving knife are in away from work Make face position, can thus make it that there is sufficient placement space between stationary knife and working face, without in stationary knife and dynamic Reserved between knife and certain put material space, so that the design runlength of moving knife shear action can greatly reduce, and be advantageous to carry High shear rates.

In the cutter structure of above-mentioned sewing machine, the drive cylinder electrically connects with the controller of sewing machine, described dynamic Knife does shearing motion, the cutter motor up and down by cutter motor driving and is also electrically connected with the controller.In this cutter structure, drive The action of cylinder and cutter motor of taking offence accurately is controlled by controller.

In the cutter structure of above-mentioned sewing machine, when needing to place cloth, the controller control drive cylinder drives Dynamic stationary knife moves away from the position of working face, and the controller control cutter motor driving moving knife moves away from working face Position；When needing to shear cloth, the controller control drive cylinder driving stationary knife is moved adjacent to the position of working face simultaneously It is pressed on working face, the controller control cutter motor driving moving knife does shearing motion up and down.In this cutter structure, stationary knife can Lifted with opposite working or binder action, thus without reserved between stationary knife and moving knife it is certain put material space, So allow the design runlength of moving knife shear action to greatly reduce, be advantageous to improve shear rate.

In the cutter structure of above-mentioned sewing machine, the moving knife does shearing motion up and down, institute by cutter motor driving Stating cutter structure also includes movable knife rack and the moving knife bar for fixing moving knife, be respectively fixed with the movable knife rack can drive it is dynamic The moving knife electric rotating machine of knife bar rotation and the cutter motor that moving knife bar can be driven to move up and down, the movable knife rack are fixed on sewing On the support of machine, actuator two is additionally provided with the tool fixing frame, the actuator two can drive stationary knife bar to slide over stationary knife Frame internal rotation, the actuator one and actuator two are each attached in tool fixing frame, and the tool fixing frame is fixed on the head of sewing machine On, the moving knife electric rotating machine and cutter motor are each attached on movable knife rack, and the movable knife rack is fixed on the support of sewing machine, The stationary knife is located at the top of moving knife.In cloth trimming shear history, actuator two can control stationary knife rotate rotating speed and Angle is synchronous with stationary knife, then moving knife and stationary knife can synchronize rotation according to the contour shape of trimming and cut come adjustment angle Cut, it is achieved thereby that the complicated trimming operation of cloth multi-angle；Simultaneously as during cloth trimming, stationary knife is in the axial direction It will not move, and moving knife can do shearing motion up and down, now the rotating speed of cutter motor is higher can produce larger vibration, be different from Conventional design of the moving knife in upper, stationary knife under in the prior art, this structure is by the way that stationary knife is arranged in, moving knife is arranged in down, Specifically, be arranged in by the way that relatively small tool fixing frame will be vibrated on head, will vibrate larger movable knife rack be arranged in it is more steady Surely on support, so that the vibration for being delivered to moving knife part will be relatively small, so as to be advantageous to improve moving knife action Stability, and then be advantageous to improve the trimming quality of cloth.

In the cutter structure of above-mentioned sewing machine, moving knife bar sliding sleeve, the moving knife are rotatably connected in the movable knife rack Bar is located in moving knife bar sliding sleeve and circumferentially positioned with moving knife bar sliding sleeve, and the cutter motor passes through transmission mechanism and passed with moving knife bar Dynamic connection, the transmission mechanism can drive moving knife bar to be slided up and down along moving knife bar sliding sleeve, electricity are hinged with the movable knife rack Machine installing plate, the cutter motor are fixed on motor mounting plate, and feed cylinder, the feed gas are fixed with the movable knife rack Cylinder can pushing motor installing plate swings with respect to movable knife rack and makes cutter motor, transmission mechanism and moving knife bar move up together or Move down.By the design of above feed cylinder, between moving knife carries out shear action, feed cylinder pushing motor installing plate turns It is dynamic, so as to drive cutter motor, transmission mechanism and moving knife bar to move up together, and then enable moving knife to pass through cloth, also It is to say, is designed more than so that moving knife can carry out the process for wearing cloth before shearing, so that the cutting position energy of moving knife Enough accurate positionings, so that the profile that follow-up trimming obtains can be more regular, and then improve the trimming quality of cloth.

In the cutter structure of above-mentioned sewing machine, the transmission mechanism includes being connected on the motor shaft of cutter motor Crank, connecting rod one and connecting rod two is provided between crank and the moving knife bar, one end of the connecting rod one is hinged on crank, institute The other end for stating connecting rod one is hinged on the lower end of connecting rod two, and the upper end of the connecting rod two is hinged on moving knife bar.Set more than The rotational motion of cutter motor can be converted into the up and down motion of moving knife bar by the transmission mechanism of meter, so that cutter motor energy Enough driving moving knife bar does shearing motion up and down；As an alternative, above-mentioned transmission mechanism can use gear ＆ rack structure to replace, Cutter motor can use clockwise and anticlockwise motor.

In the cutter structure of above-mentioned sewing machine, the moving knife bar sliding sleeve is rotatablely connected by bearing and movable knife rack, institute State moving knife bar sliding sleeve and pass one end of movable knife rack and be fixed with timing belt tooth and timing belt back-up ring, the moving knife electric rotating machine is fixed on Moving knife bar sliding sleeve is driven to rotate on movable knife rack and by timing belt.Designed more than, moving knife electric rotating machine can drive moving knife Bar sliding sleeve rotates, because moving knife bar and moving knife bar sliding sleeve are circumferentially positioned, so that moving knife electric rotating machine can drive moving knife bar Rotation；Meanwhile the design of above-mentioned timing belt tooth and timing belt, the stability of stationary knife bar rotation is advantageously ensured that, is so advantageous to Improve follow-up trimming quality.

In the cutter structure of above-mentioned sewing machine, the drive link is respectively fixedly connected limited up and down on the stationary knife bar of both sides Position back-up ring.Designed more than, drive link can be made to be more securely retained in locating rod, prevent drive link from sliding It is dynamic.

Compared with prior art, the cutter structure of this sewing machine has advantages below：Moving knife in this cutter structure is with determining Spacing size between knife can adjust, in design without reserved between stationary knife and moving knife it is certain put material space, so The design runlength of moving knife shear action is greatly reduced, so as to substantially increase the trimming speed to cloth, and trimming The raising of speed enables cloth trimming more continuous neat, and then improves the trimming quality of cloth.

Brief description of the drawings

Fig. 1 is the structural representation that this cutter structure is arranged on sewing machine.

Fig. 2 is the schematic diagram of this cutter structure.

Fig. 3 is the structural representation of stationary knife part in this cutter structure.

Fig. 4 is the structural representation of stationary knife bar and stationary knife sliding sleeve in this cutter structure.

Fig. 5 is the structural representation of moving knife part in this cutter structure.

In figure, 1, tool fixing frame；2nd, movable knife rack；3rd, stationary knife bar；4th, moving knife bar；5th, stationary knife；6th, moving knife；7th, moving knife electric rotating Machine；8th, cutter motor；9th, stationary knife bar sliding sleeve；10th, stationary knife electric rotating machine；11st, drive cylinder；12nd, moving knife bar sliding sleeve；13rd, motor Installing plate；14th, feed cylinder；15th, chute；16th, sliding pin；17th, drive link；18th, spring one；19th, axle sleeve；20th, spring two； 21st, crank；22nd, connecting rod one；23rd, connecting rod two；24th, timing belt tooth；25th, timing belt back-up ring；26th, timing belt；27th, spacing back-up ring； 28th, limited block；29th, bolt；30th, limited post；31st, stationary knife seat；32nd, connecting pole；33rd, baffle ring；34th, bearing；35th, head；36th, machine Seat.

Embodiment

It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these embodiments.

Specifically, as shown in figure 1, the cutter structure of this sewing machine includes tool fixing frame 1, is fixed on the support 36 of sewing machine On movable knife rack 2, the stationary knife bar 3, moving knife bar 4, the stationary knife seat being fixed on stationary knife bar 3 that are fixed on the head 35 of sewing machine 31st, the stationary knife 5 being fixed on stationary knife seat 31 and the moving knife 6 being fixed on moving knife bar 4.

As shown in Figures 2 and 3, be rotatably connected to stationary knife bar sliding sleeve 9 in tool fixing frame 1, stationary knife bar sliding sleeve 9 by bearing 34 with Tool fixing frame 1 is rotatablely connected.Be fixed with tool fixing frame 1 stationary knife bar sliding sleeve 9 can be driven to rotate and make the rotation of stationary knife bar sliding sleeve 9 with The actuator two of the rotation synchronization of moving knife bar 4, i.e. stationary knife electric rotating machine 10.One end that stationary knife bar sliding sleeve 9 passes tool fixing frame 1 is consolidated Surely there are timing belt tooth 24 and timing belt back-up ring 25, stationary knife electric rotating machine 10 is fixed in tool fixing frame 1 and driven by timing belt 26 Stationary knife bar sliding sleeve 9 rotates.Stationary knife bar 3 is located in stationary knife bar sliding sleeve 9 and circumferentially positioned with stationary knife bar sliding sleeve 9, and concrete scheme is such as Under:The chute 15 opened up vertically as shown in figure 4, stationary knife bar 3 is slidably connected with stationary knife bar sliding sleeve 9 and had on stationary knife bar 3, it is fixed Sliding pin 16 is equipped with the outer wall of knife bar sliding sleeve 9, sliding pin 16 passes through the inwall of stationary knife bar sliding sleeve 9 and penetrated into chute 15 with sliding Groove 15 is slidably connected.

Meanwhile actuator one, i.e. drive cylinder 11 are further fixed in above-mentioned tool fixing frame 1.Stationary knife bar 3 is in drive cylinder 11 Driving is lower to be moved up and down along stationary knife bar sliding sleeve 9 with respect to the working face for being used to place cloth on sewing machine.It is solid on stationary knife bar 3 Drive link 17 is connected with, limited location back-up ring 27 is respectively fixedly connected on the stationary knife bar 3 of both sides about 17 in drive link.Drive cylinder 11 Piston rod is connected in drive link 17, and spring 1, one 18 sets of spring are provided between drive link 17 and stationary knife bar sliding sleeve 9 It is located on stationary knife bar 3 and both ends is born against in drive link 17 and stationary knife bar sliding sleeve 9.Between drive link 17 and stationary knife 5 Stationary knife bar 3 on be also fixed with axle sleeve 19, spring 2 20 is provided between axle sleeve 19 and drive link 17, spring 2 20 is set in On stationary knife bar 3 and both ends are born against on axle sleeve 19 and drive link 17.

As shown in Figure 2 and Figure 5, the moving knife electric rotating machine 7 and energy that moving knife bar 4 can be driven to rotate are fixed with movable knife rack 2 The cutter motor 8 for enough driving moving knife bar 4 to move up and down.Moving knife bar sliding sleeve 12, moving knife bar sliding sleeve 12 are rotatably connected in movable knife rack 2 It is rotatablely connected by bearing 34 and movable knife rack 2.One end that moving knife bar sliding sleeve 12 passes movable knife rack 2 is fixed with timing belt tooth 24 and same Step band back-up ring 25, moving knife electric rotating machine 7 are fixed on movable knife rack 2 and drive moving knife bar sliding sleeve 12 to rotate by timing belt 26.It is dynamic Knife bar 4 is located in moving knife bar sliding sleeve 12 and circumferentially positioned with moving knife bar sliding sleeve 12, reality between moving knife bar 4 and moving knife bar sliding sleeve 12 Existing circumferentially positioned mode realizes that circumferentially positioned mode is identical between stationary knife bar 3 and moving knife bar sliding sleeve 12.

Meanwhile cutter motor 8 is connected by transmission mechanism and moving knife bar 4, transmission mechanism can drive the edge of moving knife bar 4 Moving knife bar sliding sleeve 12 to slide up and down.Motor mounting plate 13 is hinged with movable knife rack 2, cutter motor 8 is fixed on motor mounting plate On 13.Be fixed with feed cylinder 14 on movable knife rack 2, feed cylinder 14 can pushing motor installing plate 13 swung with respect to movable knife rack 2 And cutter motor 8, transmission mechanism and moving knife bar 4 is set to move up or move down together.Wherein, the piston rod of feed cylinder 14 against In the downside of motor mounting plate 13, limited block 28 is fixed with the movable knife rack 2 of the upside of motor mounting plate 13, screw thread on limited block 28 It is connected with bolt 29, screw head threaded connection and the limited post 30 of bolt 29.Above-mentioned limited post 30 is that motor mounting plate 13 carries For spacing, and the position of limited post 30 can screw adjustment according to the difference of fabric thickness.

More specifically, above-mentioned transmission mechanism includes the crank 21 being connected on the motor shaft of cutter motor 8, crank 21 is with moving Connecting rod 1 and connecting rod 2 23 are provided between knife bar 4, one end of connecting rod 1 is hinged on crank 21, connecting rod 1 it is another End is hinged on the lower end of connecting rod 2 23, and the upper end of connecting rod 2 23 is hinged on moving knife bar 4.Connecting pole 32 is fixed with moving knife bar 4, Connecting pole 32 and the pivot knuckles of connecting rod two, the both sides up and down of connecting pole 32 are equipped with what is moved axially for preventing connecting pole 32 Baffle ring 33, baffle ring 33 are connected on moving knife bar 4.

Again more specifically, drive cylinder 11 electrically connects with the controller of sewing machine, cutter motor 8 is also electrically connected with controller Connect.When needing to place cloth, controller control drive cylinder 11 drives stationary knife 5 to move away from the position of working face, controls The device control driving moving knife 6 of cutter motor 8 moves away from the position of working face；When needing to shear cloth, controller control is driven Cylinder 11 of taking offence driving stationary knife 5 is moved adjacent to the position of working face and is pressed on working face, and controller control cutter motor 8 drives Moving knife 6 does shearing motion up and down.

Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Although tool fixing frame 1, movable knife rack 2, stationary knife bar 3, moving knife bar 4, stationary knife 5, moving knife 6, moving knife have more been used herein Electric rotating machine 7, cutter motor 8, stationary knife bar sliding sleeve 9, stationary knife electric rotating machine 10, drive cylinder 11, moving knife bar sliding sleeve 12, motor peace Loading board 13, feed cylinder 14, chute 15, sliding pin 16, drive link 17, spring 1, axle sleeve 19, spring 2 20, crank 21, company Bar 1, connecting rod 2 23, timing belt tooth 24, timing belt back-up ring 25, timing belt 26, spacing back-up ring 27, limited block 28, bolt 29, The terms such as limited post 30, stationary knife seat 31, connecting pole 32, baffle ring 33, bearing 34, head 35, support 36, but be not precluded from using it The possibility of its term.It is used for the purpose of more easily describing and explaining essence of the present utility model using these terms；It Be construed to any additional limitation and all disagreed with the utility model spirit.

Claims (10)

1. there is the working face for being used for placing cloth, the cutter structure a kind of cutter structure of sewing machine, on the sewing machine Including moving knife (6), tool fixing frame (1), stationary knife bar (3), the stationary knife (5) being fixed on stationary knife bar (3), it is characterised in that described fixed Be provided with actuator one on knife rest (1), the actuator one can drive stationary knife bar (3) it is mobile make stationary knife (5) be in it is close or Position of the person away from working face, when stationary knife (5) is in close to the position of working face, the moving knife (6) does shearing motion.

2. the cutter structure of sewing machine according to claim 1, it is characterised in that be rotatablely connected in the tool fixing frame (1) Have a stationary knife bar sliding sleeve (9), the stationary knife bar (3) be located in it is in stationary knife bar sliding sleeve (9) and circumferentially positioned with stationary knife bar sliding sleeve (9), The actuator one can drive stationary knife bar (3) to be moved up and down along stationary knife bar sliding sleeve (9) opposite working.

3. the cutter structure of sewing machine according to claim 2, it is characterised in that the stationary knife bar (3) slides with stationary knife bar Set (9) is slidably connected and has the chute (15) that opens up vertically on stationary knife bar (3), on the outer wall of the stationary knife bar sliding sleeve (9) Be equipped with sliding pin (16), the sliding pin (16) through stationary knife bar sliding sleeve (9) inwall and penetrate into the chute (15) and institute Chute (15) is stated to be slidably connected.

4. the cutter structure of sewing machine according to claim 2, it is characterised in that the actuator one is drive cylinder (11) drive link (17), is fixed with the stationary knife bar (3), the piston rod of the drive cylinder (11) is connected in drive link (17) on, spring one (18) is provided between the drive link (17) and stationary knife bar sliding sleeve (9), the spring one (18) is arranged On stationary knife bar (3) and both ends are born against in drive link (17) and stationary knife bar sliding sleeve (9).

5. the cutter structure of sewing machine according to claim 4, it is characterised in that the drive link (17) and stationary knife (5) axle sleeve (19) is also fixed with the stationary knife bar (3) between, spring is provided between the axle sleeve (19) and drive link (17) Two (20), the spring two (20) is set on stationary knife bar (3) and both ends are born against in axle sleeve (19) and drive link (17) On.

6. the cutter structure of the sewing machine according to Claims 2 or 3 or 4 or 5, it is characterised in that when stationary knife (5) is in remote From working face position when, the moving knife (6) is also at the position away from working face.

7. the cutter structure of sewing machine according to claim 4, it is characterised in that the drive cylinder (11) and sewing machine Controller electrical connection, the moving knife (6) by cutter motor (8) driving does up and down shearing motion, the cutter motor (8) It is electrically connected with the controller.

8. the cutter structure of sewing machine according to claim 7, it is characterised in that when needing to place cloth, the control Device control drive cylinder (11) driving stationary knife (5) processed moves away from the position of working face, and the controller controls cutter motor (8) moving knife (6) is driven to move away from the position of working face；When needing to shear cloth, the controller controls drive cylinder (11) stationary knife (5) is driven to be moved adjacent to the position of working face and be pressed on working face, the controller control cutter motor (8) Driving moving knife (6) does shearing motion up and down.

9. the cutter structure of the sewing machine according to Claims 2 or 3 or 4 or 5, it is characterised in that the moving knife (6) passes through Shearing motion up and down is done in cutter motor (8) driving, and the cutter structure also includes movable knife rack (2) and for fixing moving knife (6) Moving knife bar (4), the moving knife electric rotating machine (7) and energy that moving knife bar (4) can be driven to rotate are respectively fixed with the movable knife rack (2) The above-mentioned cutter motor (8) for enough driving moving knife bar (4) to move up and down, the movable knife rack (2) are fixed on the support (36) of sewing machine On, actuator two is additionally provided with the tool fixing frame (1), the actuator two can drive stationary knife bar sliding sleeve (9) in tool fixing frame (1) internal rotation, the actuator one and actuator two are each attached in tool fixing frame (1), and the tool fixing frame (1) is fixed on sewing machine Head (35) on, the stationary knife (5) is located at the top of moving knife (6).

10. the cutter structure of sewing machine according to claim 9, it is characterised in that be rotatablely connected in the movable knife rack (2) There is moving knife bar sliding sleeve (12), the moving knife bar (4) is located in moving knife bar sliding sleeve (12) and circumferentially determined with moving knife bar sliding sleeve (12) Position, the cutter motor (8) are connected by transmission mechanism and moving knife bar (4), and the transmission mechanism can drive moving knife bar (4) slided up and down along moving knife bar sliding sleeve (12), motor mounting plate (13), the cutting knife electricity are hinged with the movable knife rack (2) Machine (8) is fixed on motor mounting plate (13), and feed cylinder (14), the feed cylinder are fixed with the movable knife rack (2) (14) can pushing motor installing plate (13) swung with respect to movable knife rack (2) and make cutter motor (8), transmission mechanism and moving knife bar (4) move up or move down together.