CN108118450A

CN108118450A - A kind of lockstitch button holder

Info

Publication number: CN108118450A
Application number: CN201611076996.XA
Authority: CN
Inventors: 蔡锦飚; 谭炜军; 严文进; 丁国涛
Original assignee: Bullmer Electromechanical Technology Co Ltd
Current assignee: Bullmer Electromechanical Technology Co Ltd
Priority date: 2016-11-29
Filing date: 2016-11-29
Publication date: 2018-06-05
Anticipated expiration: 2036-11-29
Also published as: CN108118450B

Abstract

The present invention provides a kind of lockstitch button holder, upper thread cutting mechanism including being used to cut upper thread, for cutting the lower thread cutting mechanism of bottom line, and the foot lifting mechanism for presser foot lifter, the upper thread cutting mechanism includes upper trimming drive component, and the upper trimming executive module by upper trimming drive component drive actions, the lower thread cutting mechanism includes lower trimming drive component, and the lower trimming executive module by lower trimming drive component drive actions, the foot lifting mechanism includes presser foot lifter drive component, and the presser foot lifter executive module by presser foot lifter drive component drive actions, the upper trimming drive component, lower trimming drive component, and presser foot lifter drive component is all by same driving motor drive actions.In above-mentioned lockstitch button holder, be used only a driving motor can just drive simultaneously thread cutting mechanism, lower thread cutting mechanism and foot lifting mechanism action, therefore the structure of lockstitch button holder and it is automatically controlled greatly simplified, optimized, so as to greatly reduce the manufacture cost of lockstitch button holder.

Description

A kind of lockstitch button holder

Technical field

The present invention relates to a kind of garment sewing equipment, more particularly to a kind of lockstitch button holder.

Background technology

Lockstitch button holder is the type in industrial sewing machine, belongs to extraordinary machine, is mainly used for processing the button in all kinds of dress ornaments Hole.With the continuous development of technology, lockstitch button holder also develops towards semi-automatic, full-automatic direction, therefore its function is also increasingly It is perfect, for example, lockstitch button holder can realize the functions such as automatic shearing, automatic needle-foot-lifting, automatic sewing.For this purpose, all match somebody with somebody in lockstitch button holder It is equipped with to cut the upper thread cutting mechanism of upper thread, for cutting the lower thread cutting mechanism of bottom line and the foot lifting mechanism for presser foot lifter. At present, upper thread cutting mechanism, lower thread cutting mechanism and foot lifting mechanism are each driven respectively by three motors, automatic so as to realize respectively Upper thread, automatic shearing bottom line and automatic needle-foot-lifting are cut, therefore, the lockstitch button holder mechanical structure of this structure and automatically controlled all very multiple Miscellaneous, automatically controlled failure rate is high, and cost is also higher.

The content of the invention

In view of the foregoing deficiencies of prior art, it is an object of the invention to provide a kind of lockstitch button holder, one is used Motor drives three mechanisms, simplifies structure with this, reduces cost.

To achieve the above object, the present invention provides a kind of lockstitch button holder, including being used to cutting the upper thread cutting mechanism of upper thread, for cutting The lower thread cutting mechanism and the foot lifting mechanism for presser foot lifter of bottom line, the upper thread cutting mechanism include upper trimming drive component, And it is connected with upper trimming drive component and by the upper trimming executive module of upper trimming drive component drive actions, is cut under described Line mechanism includes lower trimming drive component and is connected with lower trimming drive component and by lower trimming drive component drive actions Lower trimming executive module, the foot lifting mechanism includes presser foot lifter drive component and with presser foot lifter drive component being connected And by the presser foot lifter executive module of presser foot lifter drive component drive actions, the upper trimming drive component, lower trimming drive component, And presser foot lifter drive component is all by same driving motor drive actions.

Further, further include overhead cam and lower cam, the overhead cam and lower cam all by driving motor directly or Ground connection driving rotates, and the upper trimming drive component and presser foot lifter drive component are all connected with overhead cam, and the lower trimming drives Dynamic component is connected with lower cam.

Preferably, the driving motor is installed and to be vertical with the motor output shaft extended up and down, the driving motor Motor output shaft upper and lower ends respectively from the motor housing of driving motor upwards stretch out and extend downwardly, it is described on Cam is fixed on the upper end of motor output shaft, and lower cam is fixed on the lower end of motor output shaft.

Further, the upper trimming executive module includes the first rocking bar, the second rocking bar and the upper scissors for cutting upper thread Component, trimming is convex on trimming cam channel and second including being opened on first on overhead cam for the upper trimming drive component Take turns sliding slot, trimming group of drive rods in trimming group of drive rods and second on first；Trimming cam channel and second on described first Upper trimming cam channel is all closed curve shape, and trimming cam channel all includes head on trimming cam channel and second on first The upper trimming that tail is sequentially connected cuts across section, upper trimming section to be cut, upper stitch scissors line segment and upper trimming reset section；It is cut on described first Line group of drive rods is equipped with trimming roller on rotatable first, is cut on the first of trimming roller insertion overhead cam on described first It is engaged in line cam sliding slot and with trimming cam channel on first, the end of trimming group of drive rods and first on described first Rocking bar is hinged, the folding for controlling upper cutting assemblies；Trimming group of drive rods is equipped with rotatable second on described second Upper trimming roller, on described second on the second of trimming roller insertion overhead cam in trimming cam channel and with trimming on second Cam channel is engaged, and the end of trimming group of drive rods and the second rocking bar are hinged, for controlling upper scissors group on described second Part walks.

Further, trimming group of drive rods includes first of trimming driving crank and bending extension on first on described first Upper trimming connecting rod, one end of trimming driving crank has first to fix swing pivot on described first, and trimming drives on described first One end of the other end and trimming connecting rod on first of dynamic crank is hinged, and the other end of trimming connecting rod shakes with described first on first Bar is hinged, and trimming roller is installed in rotation on first on trimming driving crank on described first.

Further, trimming group of drive rods includes second of trimming driving crank and bending extension on second on described second Upper trimming connecting rod, one end of trimming driving crank has second to fix swing pivot on described second, and trimming drives on described second One end of the other end and trimming connecting rod on second of dynamic crank is hinged, and the other end of trimming connecting rod shakes with described second on second Bar is hinged, and trimming roller is installed in rotation on second on trimming driving crank on described second.

Preferably, trimming cam channel is opened in the upper of overhead cam respectively on trimming cam channel and second on described first On end face and lower face.

Further, the changing rule of trimming cam channel radius is on described first：The radius that upper trimming cuts across section is first Gradually increased after being gradually reduced, upper trimming wait the radius for cutting section be first gradually reduced afterwards gradually increase, the radius of upper stitch scissors line segment It is gradually reduced and tail end has the radius minimum value of trimming cam channel on first, after the radius of upper trimming reset section is first constant It gradually increases.

Further, the changing rule of trimming cam channel radius is on described second：The radius that upper trimming cuts across section is first It being gradually reduced after constant, upper trimming is constant after the radius for cutting section first gradually increases, the radius of upper stitch scissors line segment gradually increases, And tail end has the radius maximum of trimming cam channel on second, the radius of upper trimming reset section is gradually reduced.

Preferably, trimming cam channel also all includes upper trimming idle stroke on trimming cam channel and second on described first Section, the upper trimming idle stroke section are located at upper trimming reset section and between upper trimming cut across section, the upper trimming idle stroke section Radius is constant.

Further, the lower trimming executive module includes the first scissors control panel, the second scissors control panel and for cutting The lower scissors component of bottom line, the lower trimming drive component include being opened in first time trimming cam channel in lower cam and the Two times trimming cam channels, first time trimming group of drive rods and second time trimming group of drive rods；First time trimming cam Sliding slot and second time trimming cam channel are all closed curve shape, and first time trimming cam channel and second time trimming cam The lower trimming that sliding slot all includes being sequentially connected end to end in turn cuts across section, lower trimming section to be cut, lower stitch scissors line segment and lower trimming reset section； First time trimming group of drive rods is equipped with rotatable first time trimming roller, convex under first time trimming roller insertion It is engaged in first time trimming cam channel of wheel and with first time trimming cam channel, first time trimming group of drive rods End and the first scissors control panel be hinged, the folding for controlling lower scissors component；Second time trimming group of drive rods It is equipped with rotatable second time trimming roller, second time trimming cam channel of second time trimming roller insertion lower cam In and be engaged with second time trimming cam channel, the end of second time trimming group of drive rods and the second scissors control panel It is hinged, for controlling walking for lower scissors component.

Further, first time trimming group of drive rods includes first time trimming driving crank, the first of bending extension Crank connecting link and the second crank connecting link, one end of first time trimming driving crank have the 3rd to fix swing pivot, institute The one end for stating the other end and the first crank connecting link of first time trimming driving crank is hinged, the other end of the first crank connecting link and One end of second crank connecting link is mutually fixed, and the other end of the second crank connecting link is hinged with the first scissors control panel, described First time trimming roller is installed in rotation on first time trimming driving crank.

Further, second time trimming group of drive rods include second time trimming driving crank, the 3rd crank connecting link, with And lower trimming connecting rod, one end of second time trimming driving crank have the 4th to fix swing pivot, second time trimming One end of the other end and the 3rd crank connecting link of crank is driven to be hinged, the other end of the 3rd crank connecting link and lower trimming connecting rod One end is hinged, and the other end of lower trimming connecting rod is hinged with the second scissors control panel, and the lower trimming connecting rod has the 5th Fixed swing pivot, second time trimming roller are installed in rotation on second time trimming driving crank.

Preferably, first time trimming cam channel and second time trimming cam channel are all opened in the lower end of lower cam On face, first time trimming cam channel is located at the inner ring side of second time trimming cam channel.

Further, the changing rule of first time trimming cam channel radius is：The radius that lower trimming cuts across section is first It is gradually reduced after constant and radius minimum value of the tail end with first time trimming cam channel, the radius of lower trimming section to be cut is first Gradually increase rear constant, the radius of lower stitch scissors line segment is constant, and the radius of lower trimming reset section is constant.

Further, the changing rule of second time trimming cam channel radius is：Lower trimming cuts across the radius of section not Become, the radius of lower trimming section to be cut is constant, and the radius of lower stitch scissors line segment gradually increases and tail end has second time trimming cam The radius maximum of sliding slot, the radius of lower trimming reset section are first gradually reduced rear constant.

Preferably, first time trimming cam channel and second time trimming cam channel also all include lower trimming idle stroke Section, the lower trimming idle stroke section are located at lower trimming reset section and between lower trimming cut across section, the lower trimming idle stroke section Radius is constant.

Further, the presser foot lifter executive module has presser bar, and the presser foot lifter drive component includes offering Presser foot lifter cam channel on overhead cam, the presser foot lifter driving crank with the 6th fixation swing pivot are rotatably connected to The presser foot lifter roller of presser foot lifter driving crank one end, one end are connected and with the other end of presser foot lifter driving crank with the 7th The presser foot lifter swing rod and driving member of fixed swing pivot, the presser foot lifter cam channel are closed curve shape, the presser foot lifter Be engaged in the presser foot lifter cam channel of roller insertion overhead cam and with presser foot lifter cam channel, one end of the driving member with The other end of presser foot lifter swing rod is hinged, and the other end of driving member is connected with presser foot lifter executive module, presser bar is driven to move up Or it moves down.

Preferably, the presser foot lifter driving crank is connected with presser foot lifter swing rod by a connection piece, the adapter bag Include adapter body part and the adapter axle portion extended straight down from the lower end of adapter body part, the presser foot lifter pendulum The presser foot lifter fixed pin of a front and rear extension is fixed in one end of bar, the adapter axle portion is rotatable and axially displaceably wears It is located in the other end of presser foot lifter driving crank, the presser foot lifter fixed pin is rotatable and is axially displaceably threaded through adapter In body part.

Preferably, the lower end of the presser foot lifter driving crank is equipped with a torsional spring, which makes presser foot lifter roller be close to lift The slot circumferential surface of presser feet cam channel.

Further, the presser foot lifter executive module include with the 8th fix swing pivot presser feet lifting and swinging bar, Presser feet lifting linking member, the relatively-stationary guide plate in position and stent offer first extended up and down in the guide plate and lead To slot, the stent is equipped with a sliding block protruded, and the presser bar is fixed in the bracket, the other end and pressure of the driving member One end of foot lifting and swinging bar is hinged, and the other end of the presser feet lifting and swinging bar is mutually cut with scissors with the upper end of presser feet lifting linking member It connects, the lower end of the presser feet lifting linking member is hinged with sliding block, and the sliding block is located in the first guide groove of guide plate and can be It is slided up and down in one guide groove.

Preferably, the regulating tank of about one extension, the presser feet lifting and swinging bar are offered in the presser feet lifting linking member The axial screw being threaded through with presser feet lifting linking member by one in the regulating tank is hinged；A pressure is cased on the presser bar Spring, the upper and lower ends of the compression spring bear against casing and stent in lockstitch button holder.

Further, the foot lifting mechanism further includes the presser foot lifter for the hinge joint for acting on presser foot lifter swing rod and driving member Height adjustment assembly, presser foot lifter height adjustment assembly are used to adjust the high and low position of the hinge joint of presser foot lifter swing rod and driving member.

Preferably, the presser foot lifter height adjustment assembly includes guide-rail plate moving up and down, for driving guide-rail plate The operating parts and connecting pin of lower movement, the guide-rail plate have the first guide-rail plate arm and the second guide-rail plate being arranged in parallel Arm, the operating parts are connected with the first guide-rail plate arm, the second guide-rail plate arm, one end of driving member and lift pressure The other end of foot swing rod is hinged by the connecting pin, is offered in the presser foot lifter swing rod along the length side of presser foot lifter swing rod To the first sliding groove of extension, the second guide-rail plate arm offers second extended along the second guide-rail plate arm length direction and slides Slot, the connecting pin are threaded through in the first sliding groove and the second sliding slot.

Preferably, the presser foot lifter height adjustment assembly further includes mounting bracket, which includes the casing with lockstitch button holder Mutually fixed mounting bracket fixed part and the mounting bracket guide part for offering the second guide groove extended up and down, the guide-rail plate Also there is guide-rail plate body part between the first guide-rail plate arm and the second guide-rail plate arm, on the guide-rail plate body part Guide blot is fixed with, the guide blot is threaded through in the second guide groove of mounting bracket guide part.

Further, the operating parts for one can fast clutch adjusting knob, adjusting knob include the fixed tune in position Section limiting plate, be rotationally threaded through the shaft adjusted in limiting plate, be fixed on the knob of shaft one end, to be fixed on shaft another The regulating wheel at end and the spring between knob and adjusting limiting plate, the spring are in compressive state, the regulating wheel Spacing teat is equipped with towards the end face for adjusting limiting plate, regulating wheel is equipped with backwards to the other end for adjusting limiting plate with turning The eccentric axial portion that eccentric shaft is set, offer towards regulating wheel on the adjusting limiting plate and with the matched /V of spacing teat Recess portion；When pressing knob, the spacing teat in the regulating wheel is separated with adjusting the /V recess portion on limiting plate, and knob leads to Crossing shaft drives regulating wheel to rotate；When unclamping knob, the spacing teat in the regulating wheel is with adjusting the /V on limiting plate Recess portion is engaged, adjusting knob self-locking.

Preferably, the spacing teat in the regulating wheel is a limit bolt, the /V recess portion adjusted on limiting plate For multiple limit holes；When unclamping knob, the end of the limit bolt is inserted in a limit hole in multiple limit holes.

Preferably, the end face for adjusting limiting plate towards regulating wheel is equipped with two backing pins, and two backing pins distinguish position Rotation at the both ends of /V recess portion, for limiting the limit bolt.

As described above, lockstitch button holder of the present invention, has the advantages that：

In above-mentioned lockstitch button holder, be used only a driving motor can just drive simultaneously thread cutting mechanism, lower thread cutting mechanism and Foot lifting mechanism act, therefore the structure of lockstitch button holder and it is automatically controlled greatly simplified, optimized, so as to greatly reduce lockstitch button holder Cost is manufactured, there is extraordinary application prospect.

Description of the drawings

Fig. 1 is the structure diagram of lockstitch button holder in the application.

Fig. 2 is that the structure diagram after casing is omitted in Fig. 1.

Fig. 3 is the structure diagram of upper thread cutting mechanism in the application.

Fig. 4 is the structure diagram of trimming group of drive rods on first in Fig. 3.

Fig. 5 is the structure diagram of trimming group of drive rods on second in Fig. 3.

Fig. 6 is the structure diagram of trimming cam channel on first in Fig. 3.

Fig. 7 is the structure diagram of trimming cam channel on second in Fig. 3.

Fig. 8 be in the application on first on trimming cam channel and second trimming cam channel radius change graph.

Fig. 9 and Figure 10 is the structure diagram of lower thread cutting mechanism in the application, is not shown in figure driving motor.

Figure 11 is the bottom view of Fig. 9.

Figure 12 is the bottom view of lower cam in Fig. 9, and also as first time trimming cam channel and second time trimming cam are slided The structure diagram of slot.

Figure 13 is the radius change graph of first time trimming cam channel and second time trimming cam channel in the application.

Figure 14, Figure 15 are structure diagram of the foot lifting mechanism under different visual angles in the application.

Figure 16 is the explosive view of Figure 15.

Figure 17 is the structure diagram of presser foot lifter drive component in Figure 15.

Figure 18 is the structure diagram of presser foot lifter executive module in Figure 15.

Figure 19 is the schematic diagram of foot lifting mechanism in the application.

Figure 20 and Figure 21 is the different embodiments of presser foot lifter height adjustment assembly in Figure 19.

Figure 22 is the side view of Figure 21.

Figure 23 is the trail change figure of presser foot lifter cam channel in the application.

Figure 24 be the application in can fast clutch adjusting knob structure diagram.

Figure 25 and Figure 26 is the explosive view of Figure 24.

Figure 27 to Figure 29 is the different embodiments of spacing teat in Figure 26.

Figure 30 is rotated one week for driving motor, and trimming cam channel on first is cut on second under trimming cam channel, first The trail change figure of line cam sliding slot, second time trimming cam channel and presser foot lifter cam channel.

Figure 31 for driving motor rotate one week, acted between upper thread cutting mechanism, lower thread cutting mechanism and foot lifting mechanism when Sequence figure.

Component label instructions

37 presser foot lifter height adjustment assembly of thread cutting mechanism on 1

38 guide-rail plate of trimming drive component on 11

381 first guide-rail plate arm of trimming group of drive rods on 12 first

382 second guide-rail plate arm of trimming roller on 121 first

Trimming drives 383 guide-rail plate body part of crank on 122 first

384 second sliding slot of trimming connecting rod on 123 first

The 3rd sliding slot of trimming group of drive rods 385 on 13 second

39 mounting bracket of trimming roller on 131 second

Trimming drives 391 mounting bracket fixed part of crank on 132 second

392 mounting bracket guide part of trimming connecting rod on 133 second

393 second guide groove of trimming executive module on 14

141 first rocking bar, 310 guide blot

142 second rocking bar, 311 connecting pin

4 overhead cam of cutting assemblies on 143

Trimming cam channel on 2 times thread cutting mechanisms 41 first

Trimming cam channel on 21 times trimming drive components 42 second

Trimming cuts across section in 22 first time trimming group of drive rods 43

Trimming section to be cut on 221 first time trimming roller 44

Stitch scissors line segment on 222 first time trimming driving crank 45

Trimming reset section on 223 first crank connecting links 46

Trimming idle stroke section on 224 second crank connecting links 47

23 second time 48 presser foot lifter cam channel of trimming group of drive rods

231 second time 481 presser foot lifter idle stroke section of trimming roller

232 second time trimming driving 482 presser foot lifter section of crank

233 the 3rd crank connecting links 483 bleed off pressure foot section

234 times 5 lower cams of trimming connecting rod

24 times trimming executive modules 51, first time trimming cam channel

241 first scissors control panel, 52 first time trimming cam channel

242 first 53 times trimmings of scissors control panel cut across section

3 trimming of foot lifting mechanism 54 times sections to be cut

The 31 stitch scissors line segments of presser foot lifter drive component 55 times

32 presser foot lifters drive 56 times trimming reset sections of crank

The 321 trimming idle stroke sections of crank body portion 57 times

322 first crank arm, 6 driving motor

323 second crank arm, 7 adjusting knob

324 presser foot lifter rollers 71 adjust limiting plate

33 adapter, 711 limit hole

331 adapter body part, 712 backing pin

332 adapter axle portion, 72 shaft

333 presser foot lifter fixed pin, 73 knob

334 swing link pins 731 are oriented to axle portion

335 torsional spring, 74 regulating wheel

34 presser foot lifter swing rod, 741 eccentric axial portion

341 the first sliding groove, 742 limit bolt

342 baffle ring, 743 gear part

35 driving member, 744 polygonal portion

36 presser foot lifter executive module, 75 spring

361 presser bar, 76 scale bidding quotation

362 presser feet lifting and swinging bar, 761 through hole

363 presser feet lifting linking member, 8 casing

364 regulating tank, 81 motor mounting plate

365 guide plate, 82 drive end unit

366 first guide groove, 83 chain-drive section

367 stent, 9 axial screw

368 sliding blocks

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 understands other advantages and effect of the present invention easily.

It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only specification to be coordinated to be taken off The content shown so that those skilled in the art understands and reads, is not limited to the enforceable qualifications of the present invention, therefore Do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the present invention Under the effect of can be generated and the purpose that can reach, it should all still fall and obtain the model that can cover in disclosed technology contents In enclosing.Meanwhile cited such as " on ", " under " in this specification, "left", "right", the term of " centre " and " one ", also it is only Convenient for the clear of narration rather than to limit the enforceable scope of the present invention, relativeness is altered or modified, in no essence It changes under technology contents, when being also considered as the enforceable scope of the present invention.

In following embodiment, all directions are defined as follows：The length direction of lockstitch button holder is defined as left and right directions, by keyhole The width of machine is defined as front-rear direction, and the short transverse of lockstitch button holder is defined as vertical direction.

The application provides a kind of lockstitch button holder, as depicted in figs. 1 and 2, lockstitch button holder include casing 8, for cut upper thread on cut Line mechanism 1, the lower thread cutting mechanism 2 for cutting bottom line and the foot lifting mechanism 3 for presser foot lifter；As shown in figure 3, on described Thread cutting mechanism 1 includes upper trimming drive component 11 and is connected with upper trimming drive component 11 and by upper trimming drive component The upper trimming executive module 14 of 11 drive actions；As shown in figure 9, the lower thread cutting mechanism 2 include lower trimming drive component 21, And it is connected with lower trimming drive component 21 and by the lower trimming executive module 24 of lower 21 drive actions of trimming drive component；Such as Shown in Figure 14, the foot lifting mechanism 3 include presser foot lifter drive component 31 and be connected with presser foot lifter drive component 31 and by The presser foot lifter executive module 36 of 31 drive actions of presser foot lifter drive component；The upper trimming drive component 11, lower trimming driving group Part 21 and presser foot lifter drive component 31 are all by same 6 drive actions of driving motor.Therefore, this application involves lockstitch button holder In, a driving motor 6 is used only just can drive thread cutting mechanism 1, lower thread cutting mechanism 2 and foot lifting mechanism 3 to act simultaneously, Therefore the structure of lockstitch button holder and it is automatically controlled greatly simplified, optimized, so as to greatly reduce the manufacture cost of lockstitch button holder, have it is non- Often good application prospect.Certainly, above-mentioned lockstitch button holder, which can also change, is：Upper trimming drive component 11 and lower trimming drive component 21 By same 6 drive actions of driving motor, realize that a driving motor 6 drives upper thread cutting mechanism 1 and lower thread cutting mechanism 2 simultaneously； Alternatively, upper trimming drive component 11 and presser foot lifter drive component 31 realize a drive all by same 6 drive actions of driving motor Dynamic motor 6 drives upper thread cutting mechanism 1 and foot lifting mechanism 3 simultaneously；Alternatively, lower trimming drive component 21 and presser foot lifter drive component 31, all by same 6 drive actions of driving motor, realize that a driving motor 6 drives lower thread cutting mechanism 2 and presser foot lifter machine simultaneously Structure 3；In terms of existing technologies, it can equally simplify structure, reduce cost.

Further, as shown in Fig. 2, lockstitch button holder further includes overhead cam 4 and lower cam 5, the overhead cam 4 and lower cam 5 All directly or indirectly drive rotation by driving motor 6, the upper trimming drive component 11 and presser foot lifter drive component 31 all with Overhead cam 4 is connected, and by driving motor 6 overhead cam 4 is driven to rotate, and then upper trimming drive component 11 and presser foot lifter is driven to drive Dynamic component 31 acts；The lower trimming drive component 21 is connected with lower cam 5, and 5 turns of lower cam is driven by driving motor 6 It is dynamic, and then lower trimming drive component 21 is driven to act.Preferably, the driving motor 6 is installed and to be vertical with extension up and down Motor output shaft, the upper and lower ends of the motor output shaft of the driving motor 6 respectively from the motor housing of driving motor 6 to Upper to stretch out and extend downwardly, the overhead cam 4 is fixed on the upper end of motor output shaft, and lower cam 5 is fixed on motor output shaft Lower end.Therefore, driving motor 6 directly drives overhead cam 4 and lower cam 5 to rotate；Further, since driving motor 6 is vertical peace Dress, therefore it can be built in casing 8, so that the structure of lockstitch button holder is compacter, further reduce the system of lockstitch button holder Cause this.

As depicted in figs. 1 and 2, the left end of the casing 8 is drive end unit 82, and the right end of casing 8 is chain-drive section 83, the machine A motor mounting plate 81 for being fixed on casing 8 is equipped in the drive end unit 82 of shell 8, the driving motor 6 is fixed on motor mounting plate On 81 lower face, so that driving motor 6 is built in the drive end unit 82 of casing 8.The overhead cam 4 is rotatably positioned in The upper side of motor mounting plate 81, and the output shaft of driving motor 6 be upward through motor mounting plate 81 after consolidate with 4 phase of overhead cam Fixed, the lower cam 5 is rotatably positioned in the lower side of motor mounting plate 81.

The concrete structure of upper thread cutting mechanism 1 is as follows：

The structure of upper trimming executive module 14 in upper thread cutting mechanism 1 belongs to the prior art, and concrete structure can be found in by outstanding person The lockstitch button holder JK-1790 types that gram sewing machine limited company is produced.In general, the as shown in figure 3, upper trimming Executive module 14 includes the first rocking bar 141, the second rocking bar 142 and the upper cutting assemblies 143 for cutting upper thread, the first rocking bar 141 Upper end and the upper end of the second rocking bar 142 be all articulated with the casing 8 of lockstitch button holder, the middle and lower sections and the second rocking bar of the first rocking bar 141 142 middle and lower sections are all connected with upper trimming drive component 11, therefore the first rocking bar 141 and the second rocking bar 142 are all driven by upper trimming The dynamic driving of component 11 is swung, and so as to which upper cutting assemblies 143 be driven to act, the action of upper cutting assemblies 143 includes folding, Yi Jiqian Afterwards and what is moved left and right walks.Upper trimming executive module 14 is located at the outside of lockstitch button holder casing 8, and positioned at the lower section of casing 8, with And the top of seam platform.

As shown in Fig. 3 to Fig. 7, the upper trimming drive component 11 is mounted in the drive end unit 82 of casing 8, the upper trimming Drive component 11 includes being opened on first on overhead cam 4 trimming cam channel 42 on trimming cam channel 41 and second, the Trimming group of drive rods 13 in trimming group of drive rods 12 and second on one.On described first on trimming cam channel 41 and second Trimming cam channel 42 is all for closed curve shape, for exporting upper trimming movement locus, trimming cam channel 41 on described first With second on trimming cam channel 42 all include the upper trimming that is sequentially connected end to end in turn cut across section 43, upper trimming section 44 to be cut, on cut Line trimming section 45 and upper trimming reset section 46.Trimming group of drive rods 12 is equipped with trimming rolling on rotatable first on described first Son 121, on described first trimming roller 121 be embedded on the first of overhead cam 4 in trimming cam channel 41 and with trimming on first Cam channel 41 is engaged, and the upper trimming movement locus for overhead cam 4 to be exported passes to trimming group of drive rods 12 on first, The end of trimming group of drive rods 12 is hinged with the first rocking bar 141, for controlling opening for upper cutting assemblies 143 on described first It closes.Trimming group of drive rods 13 is equipped with trimming roller 131 on rotatable second on described second, trimming roller on described second It is engaged on the second of 131 insertion overhead cams 4 in trimming cam channel 42 and with trimming cam channel 42 on second, for inciting somebody to action The upper trimming movement locus that overhead cam 4 exports passes to trimming group of drive rods 13 on second, trimming group of drive rods on described second 13 end is hinged with the second rocking bar 142, for controlling walking for upper cutting assemblies 143.

Upper thread cutting mechanism 1 with said structure is in operation process, and driving motor 6 drives overhead cam 4 to rotate, overhead cam 4 drive trimming cam channel 41 on first to be rotated compared with trimming roller 121 on first and drive trimming cam channel on second 42 rotate compared with trimming roller 131 on second, i.e.,：So that the relatively trimming cam along first of trimming roller 121 on first The extension track of sliding slot 41 is mobile, on second trimming roller 131 relatively along second trimming cam channel 42 extension track It is mobile, due to the variation of 42 orbital radius of trimming cam channel on trimming cam channel 41 and second on first, therefore cut on first Line roller 121 drives trimming group of drive rods 12 on first to act, and trimming roller 131 drives trimming group of drive rods on second on second 13 actions so as to which the upper cutting assemblies 143 in upper trimming executive module 14 be driven to act jointly, make cutting assemblies 143 successively Action, action to be cut, trimming action and homing action are cut across in execution.Preferably, trimming cam channel 41 and on described first Trimming cam channel 42 is opened in respectively on the upper surface and lower face of overhead cam 4 on two；Certainly, the position of the two can also be mutual It is opposite to adjust.

Specifically, when playing seam, trimming roller 131 is all located at cutting lockstitch button holder on trimming roller 121 and second on first Line is cut across at the head end of section 43, and upper cutting assemblies 143 are closed and clamp upper thread, and upper cutting assemblies 143 are located at initial position, On first trimming roller 121 on first in trimming cam channel 41 on trimming cut across at the head end of section 43, on second trimming roll Son 131 on second in trimming cam channel 42 on trimming cut across at the head end of section 43.After having started seam, trimming drives on first In bar group 12 first on upper trimming of the trimming roller 121 relatively on first in trimming cam channel 41 cut across in section 43 and move It is dynamic, on second in trimming group of drive rods 13 second on trimming roller 131 relatively on second in trimming cam channel 42 Upper trimming cuts across in section 43 and moves, and opens cutting assemblies 143, unclamps upper thread, and upper cutting assemblies 143 is driven to be moved to and are treated Cut position.Afterwards, on first in trimming group of drive rods 12 first on trimming roller 121 relatively trimming cam is slided on first Moved in upper trimming section 44 to be cut in slot 41, on second in trimming group of drive rods 13 second on trimming roller 131 relatively It is moved in upper trimming section 44 to be cut on second in trimming cam channel 42, cutting assemblies 143 are moved to cutting position in driving It puts.Then, on first in trimming group of drive rods 12 first on the relatively trimming cam channel 41 on first of trimming roller 121 In upper stitch scissors line segment 45 in move, on second in trimming group of drive rods 13 second on trimming roller 131 relatively It moving in upper stitch scissors line segment 45 on two in trimming cam channel 42, cutting assemblies 143 are closed in driving, and upper thread is cut, And the upper thread after cutting is clamped.Finally, on first in trimming group of drive rods 12 first on trimming roller 121 relatively exist Moved in upper trimming reset section 46 on first in trimming cam channel 41, on second in trimming group of drive rods 13 second on cut Line roller 131 is relatively moved in the upper trimming reset section 46 on second in trimming cam channel 42, cutting assemblies in driving 143, which hold upper thread movement, is retracted into its initial position, completes the trimming Xun Huan of a upper trimming action, and prepares to start next A trimming Xun Huan.The action sequence of the upper cutting assemblies 143 is：Origin → opening → is waited to cut → trimming → Aligning control.

As shown in figure 4, trimming group of drive rods 12 includes trimming driving crank 122 and bending extension on first on described first First on trimming connecting rod 123, the front end of trimming driving crank 122 is hinged with motor mounting plate 81 on described first, makes first Upper trimming driving crank 122 has first to fix swing pivot O1, the rear end and first of trimming driving crank 122 on described first The left end of upper trimming connecting rod 123 is hinged, and the right end of trimming connecting rod 123 is hinged with first rocking bar 141 on first, described Trimming roller 121 is installed in rotation on trimming on first by the pin of about one extension and drives under crank 122 on first On end face.Trimming group of drive rods 12 is close to a spatial four-bar mechanism on described first, and trimming roller 121 is opposite on first When trimming cam channel 41 on the first of overhead cam 4 moves, trimming driving crank 122 fixes swing pivot around first on first O1 generates the swing of certain amplitude, so as to which 123 and first rocking bar 141 of trimming connecting rod on first be driven to swing, and then drives and cuts Knife assembly 143 performs relevant action.Preferably, trimming drives crank 122 with being cut on motor mounting plate 81, first on described first Trimming connecting rod 123 is all hinged by the axial screw 9 of about one extension on line driving crank 122 and first, trimming on first Connecting rod 123 is hinged with the first rocking bar 141 by the axial screw 9 of a front and rear extension.

As shown in figure 5, trimming group of drive rods 13 includes trimming driving crank 132 and bending extension on second on described second Second on trimming connecting rod 133, the front end of trimming driving crank 132 and motor mounting plate 81 are hinged on described second, make second Upper trimming driving crank 132 has second to fix swing pivot O2, the rear end and second of trimming driving crank 132 on described second The left end of upper trimming connecting rod 133 is hinged, and the right end of trimming connecting rod 133 is hinged with second rocking bar 142 on second, described Trimming roller 131 is installed in rotation on trimming on second by the pin of about one extension and drives the upper of crank 132 on second On end face.Trimming group of drive rods 13 is also close to a spatial four-bar mechanism on described second, 131 phase of trimming roller on second Trimming driving crank 132 is fixed around second when being moved for trimming cam channel 42 on the second of overhead cam 4, on second swings branch Point O2 generates the swing of certain amplitude, so as to which 133 and second rocking bar 142 of trimming connecting rod on second be driven to swing, and then drives Cutting assemblies 143 perform relevant action.Preferably, on described second trimming driving crank 132 on motor mounting plate 81, second Trimming connecting rod 133 is all hinged by the axial screw 9 of about one extension on trimming driving crank 132 and second, is cut on second Line connecting rod 133 is hinged with the second rocking bar 142 by the axial screw 9 of a front and rear extension.

Since upper thread cutting mechanism 1 and foot lifting mechanism 3 share a driving motor 6, as shown in Figure 6 and Figure 7, institute Stating on first trimming cam channel 42 on trimming cam channel 41 and second also all includes upper trimming idle stroke section 47, it is described on cut Line idle stroke section 47 is located at upper trimming reset section 46 and between upper trimming cuts across section 43, the radius of the upper trimming idle stroke section 47 It is constant.Therefore, on first in trimming group of drive rods 12 first on trimming roller 121 relatively trimming cam is slided on first Moved in upper trimming idle stroke section 47 in slot 41, on second in trimming group of drive rods 13 second on trimming roller 131 it is opposite When ground moves in the upper trimming idle stroke section 47 in trimming cam channel 42 on second, trimming group of drive rods 12 and on first Trimming group of drive rods 13 is all failure to actuate on two, therefore 1 entirety of upper thread cutting mechanism is failure to actuate, but foot lifting mechanism 3 performs presser foot lifter Action, therefore the presser foot lifter trip segment that upper trimming idle stroke section 47 is foot lifting mechanism 3.

As shown in figure 8, the changing rule of 41 radius of trimming cam channel is on described first：Upper trimming cuts across the half of section 43 Footpath is first gradually reduced and gradually increases afterwards, upper trimming wait the radius for cutting section 44 be first gradually reduced afterwards gradually increase, upper stitch scissors line segment 45 radius is gradually reduced and tail end has the radius minimum value of trimming cam channel 41 on first, therefore upper stitch scissors line segment 45 Gradient it is larger, gradually increased after the radius of upper trimming reset section 46 is first constant, the radius of upper trimming idle stroke section 47 is constant.Institute The changing rule for stating 42 radius of trimming cam channel on second is：Upper trimming cut across section 43 radius it is first constant after be gradually reduced, Upper trimming is constant after the radius for cutting section 44 first gradually increases, and the radius of upper stitch scissors line segment 45 gradually increases and tail end has The radius maximum of trimming cam channel 42 on second, therefore the gradient of upper stitch scissors line segment 45 is larger, upper trimming reset section 46 Radius is gradually reduced, and the radius of upper trimming idle stroke section 47 is constant.

The concrete structure of lower thread cutting mechanism 2 is as follows：

Lower trimming executive module 24 is mounted on the inside of lockstitch button holder and positioned at the lower section of seam platform；Lower trimming executive module 24 Structure belong to the prior art, concrete structure can be found in the lockstitch button holder JK- produced by Jack's sewing machine limited company 1790 types.In general, as shown in figure 9, lower trimming executive module 24 in lockstitch button holder include the first scissors control panel 241, Second scissors control panel 242 and the lower scissors component for cutting bottom line, the first scissors control panel 241 and the second scissors control panel 242 all by lower 21 drive actions of trimming drive component, and so as to which lower scissors component be driven to act, the action of lower scissors component includes opening It closes and front and rear and what is moved left and right walks.

The lower trimming drive component 21 is mounted on the lower end of the drive end unit 82 of casing 8；As shown in Fig. 9 to Figure 12, under cut Line drive component 21 include being opened in first time trimming cam channel 51 in lower cam 5 and second time trimming cam channel 52, First time trimming group of drive rods 22 and second time trimming group of drive rods 23；First time trimming cam channel 51 and second Lower trimming cam channel 52 is all closed curve shape, for exporting lower trimming movement locus, first time trimming cam channel 51 and second time trimming cam channel 52 all include the lower trimming that is sequentially connected end to end in turn cut across section 53, lower trimming section 54 to be cut, under Stitch scissors line segment 55 and lower trimming reset section 56.First time trimming group of drive rods 22 is equipped with rotatable first time trimming Roller 221, first time trimming roller 221 are embedded in first time trimming cam channel 51 of lower cam 5 and with being cut under first Line cam sliding slot 51 is engaged, and the lower trimming movement locus for lower cam 5 to be exported passes to first time trimming group of drive rods 22, the end of first time trimming group of drive rods 22 is hinged with the first scissors control panel 241, for controlling lower scissors component Folding.Second time trimming group of drive rods 23 is equipped with rotatable second time trimming roller 231, second time trimming Roller 231 is embedded in second time trimming cam channel 52 of lower cam 5 and is engaged with second time trimming cam channel 52, uses Second time trimming group of drive rods 23, second time trimming driving are passed in the lower trimming movement locus for exporting lower cam 5 The end of bar group 23 is hinged with the second scissors control panel 242, for controlling walking for lower scissors component.

Lower thread cutting mechanism 2 with said structure is in operation process, and driving motor 6 drives lower cam 5 to rotate, lower cam 5 first time trimming cam channel 51 of drive rotate compared with first time trimming roller 221 and drive second time trimming cam channel 52 rotate compared with second time trimming roller 231, i.e.,：So that first time trimming roller 221 is relatively along first time trimming cam Sliding slot 51 extends track movement, second time trimming roller 231 relatively along the extension track of second time trimming cam channel 52 It is mobile, due to the variation of first time trimming cam channel 51 and second time 52 orbital radius of trimming cam channel, therefore cut under first Line roller 221 drives first time trimming group of drive rods 22 to act, and second time trimming roller 231 drives second time trimming group of drive rods 23 actions so as to drive the lower scissors component action in lower trimming executive module 24 jointly, make lower scissors component perform out successively Cut action, action to be cut, trimming action and homing action.

Specifically, when playing seam, first time trimming roller 221 and second time trimming roller 231 are all located at down cutting lockstitch button holder Line is cut across at the head end of section 53, and lower scissors component is closed and clamps bottom line, and lower scissors component is located at initial position, under first The lower trimming in first time trimming cam channel 51 of trimming roller 221 is cut across at the head end of section 53, and second time trimming roller 231 exists Lower trimming is cut across at the head end of section 53 in second time trimming cam channel 52.After having started seam, first time trimming group of drive rods 22 In lower trimming of first time trimming roller 221 relatively in first time trimming cam channel 51 cut across in section 53 and move, Second time trimming roller 231 in two times trimming group of drive rods 23 relatively in second time trimming cam channel 52 under cut Line cuts across in section 53 and moves, and opens lower scissors component, unclamps upper thread, and lower scissors component is driven to be moved to position to be cut.It Afterwards, first time trimming roller 221 in first time trimming group of drive rods 22 is relatively in first time trimming cam channel 51 It is moved in lower trimming section 54 to be cut, second time trimming roller 231 in second time trimming group of drive rods 23 is relatively under second It is moved in lower trimming section 54 to be cut in trimming cam channel 52, driving lower scissors component is moved to trimming position.Then, first First time trimming roller 221 in lower trimming group of drive rods 22 relatively lower stitch scissors in first time trimming cam channel 51 It is moved in line segment 55, second time trimming roller 231 in second time trimming group of drive rods 23 is relatively in second time trimming cam It being moved in lower stitch scissors line segment 55 in sliding slot 52, driving lower scissors component is closed, and bottom line is cut, and by the bottom line after cutting It clamps.Finally, first time trimming roller 221 in first time trimming group of drive rods 22 is relatively slided in first time trimming cam It is moved in lower trimming reset section 56 in slot 51, second time trimming roller 231 in second time trimming group of drive rods 23 is relatively It is moved in lower trimming reset section 56 in second time trimming cam channel 52, driving lower scissors component holds bottom line movement and moves back Its initial position is back to, completes the trimming Xun Huan of a lower trimming action, and prepares to start next trimming Xun Huan.It is cut under described The action sequence of knife assembly is：Origin → opening → is waited to cut → trimming → Aligning control.

In the present embodiment, as shown in figure 12, first time trimming cam channel 51 and second time trimming cam channel 52 It is all opened on the lower face of lower cam 5, and first time trimming cam channel 51 is located at the interior of second time trimming cam channel 52 Circle side, the two are arranged concentrically；Certainly, in other embodiment, it is convex that first time trimming cam channel 51 may be alternatively located at second time trimming Take turns the outer ring side of sliding slot 52, the two is arranged concentrically.

As shown in Figures 9 to 11, first time trimming group of drive rods 22 includes first time trimming driving crank 222, folding The first crank connecting link 223 and the second crank connecting link 224 of curved extension, the rear end hinge of first time trimming driving crank 222 Casing 8 is connected to, therefore the rear end of first time trimming driving crank 222 has the 3rd to fix swing pivot O3, first time trimming The front end and the left end of the first crank connecting link 223 for driving crank 222 are hinged, the right end of the first crank connecting link 223 and the second song The left end of handle connecting rod 224 is mutually fixed by screw, a left side for the first scissors control panel 241 described in the right end of the second crank connecting link 224 End is hinged, and first time trimming roller 221 is installed in rotation on first time trimming by the pin of about one extension and drives On the upper surface of dynamic crank 222.First time trimming group of drive rods 22 is the four-bar mechanism of a large span, is cut under first When line roller 221 is moved compared with first time trimming cam channel 51 of lower cam 5, first time trimming drives crank 222 around the Three fix the swing that swing pivot O3 generates certain amplitude, so as to pass through 224 band of the first crank connecting link 223 and the second crank connecting link Dynamic first scissors control panel 241 acts, and then by lower trimming executive module 24 lower scissors component is driven to perform relevant action.It is excellent Selection of land, first time trimming driving crank 222 and casing 8, first time trimming drive 222 and first crank connecting link 223 of crank, And first crank connecting link 223 and the first scissors control panel 241 be all hinged by the axial screw 9 of about one extension.

As shown in Figures 9 to 11, second time trimming group of drive rods 23 includes second time trimming driving crank 232, the Three crank connecting links 233 and lower trimming connecting rod 234, the rear end of second time trimming driving crank 232 are articulated with casing 8, Therefore the rear end of second time trimming driving crank 232 has the 4th to fix swing pivot O4, second time trimming drives crank 232 Front end and the left end of the 3rd crank connecting link 233 be hinged, a left side for the right end of the 3rd crank connecting link 233 and lower trimming connecting rod 234 End is hinged, and the right end of lower trimming connecting rod 234 is hinged with the second scissors control panel 242, a left side for the lower trimming connecting rod 234 Section portion is hinged with casing 8 by the pin of about one extension, therefore lower trimming connecting rod 234 has the 5th to fix swing pivot O5, Second time trimming roller 231 is installed in rotation on second time trimming by the pin of about one extension and drives crank 232 On.First time trimming group of drive rods 22 is a four-bar mechanism, when second time trimming roller 231 is compared with lower cam 5 During second time movement of trimming cam channel 52, second time trimming driving crank 232 is fixed swing pivot O4 around the 4th and is generated centainly The swing of amplitude, so as to by the 3rd crank connecting link 233 and lower trimming connecting rod 234 the second scissors control panel 242 be driven to act, into And by lower trimming executive module 24 lower scissors component is driven to perform relevant action.Preferably, second time trimming driving is bent Handle 232 connects with casing 8, second time 232 and the 3rd crank connecting link 233 of trimming driving crank, the 3rd crank connecting link 233 with lower trimming Bar 234 and 234 and second scissors control panel 242 of lower trimming connecting rod are all hinged by the axial screw 9 of about one extension.

In addition, first time trimming group of drive rods 22 and second time trimming group of drive rods 23 respectively form the position relationship of component such as Under：As shown in Figures 9 to 11, first time trimming driving crank 222 is located at the left side that second time trimming drives crank 232, the One crank connecting link 223 is located at the front side of the 3rd crank connecting link 233, before the second crank connecting link 224 is located at lower trimming connecting rod 234 Square side, the first scissors control panel 241 are located at the right side of the second scissors control panel 242.

Preferably due to lower thread cutting mechanism 2 shares a driving motor 6 with foot lifting mechanism 3, therefore, as shown in figure 12, First time trimming cam channel 51 and second time trimming cam channel 52 also all include lower trimming idle stroke section 57, under described Trimming idle stroke section 57 is located at lower trimming reset section 56 and between lower trimming cuts across section 53, and the half of the lower trimming idle stroke section 57 Footpath is constant.Therefore, when first time trimming roller 221 in first time trimming group of drive rods 22 is relatively in first time trimming cam It is moved in lower trimming idle stroke section 57 in sliding slot 51, second time 231 phase of trimming roller in second time trimming group of drive rods 23 When being moved over the ground in the lower trimming idle stroke section 57 in second time trimming cam channel 52, first time 22 He of trimming group of drive rods Second time trimming group of drive rods 23 is all failure to actuate, therefore lower trimming drive component 21 is also failure to actuate, and lower scissors component is also failure to actuate, and It is that the foot lifting mechanism 3 of lockstitch button holder acts, therefore the presser foot lifter trip segment that lower trimming idle stroke section 57 is lockstitch button holder.

Further, as shown in figure 3, the changing rule of first time trimming cam channel, 51 radius is：Lower trimming is opened Cut section 53 radius it is first constant after be gradually reduced and tail end has the radius minimum value of first time trimming cam channel 51, under cut Line is constant after the radius for cutting section 54 first gradually increases, and the radius of lower stitch scissors line segment 55 is constant, and the half of lower trimming reset section 56 Footpath is constant, and the radius of lower trimming idle stroke section 57 is constant.The changing rule of second time trimming cam channel, 52 radius is：Under The radius that trimming cuts across section 53 is constant, and the radius of lower trimming section 54 to be cut is constant, the radius of lower stitch scissors line segment 55 gradually increases, And tail end has a radius maximum of second time trimming cam channel 52, the radius of lower trimming reset section 56 be first gradually reduced after not Become, the radius of lower trimming idle stroke section 57 is constant.

The concrete structure of foot lifting mechanism 3 is as follows：

As shown in Figure 14 to Figure 17, the presser foot lifter executive module 36 is mounted in the chain-drive section 83 of casing 8, with upper The presser bar 361 of lower extension, the lower end of the presser bar 361 extend downwardly from casing 8 and are fixed with presser feet.The presser foot lifter Drive component 31 is mounted in the drive end unit 82 of casing 8, is slided including offering the presser foot lifter cam on 4 outer circumferential surface of overhead cam Slot 48, the presser foot lifter driving crank 32 with the 6th fixation swing pivot O6 are rotatably connected to presser foot lifter driving crank 32 The presser foot lifter roller 324 of front end, lower end are connected with the rear end of presser foot lifter driving crank 32 and fix swing pivot with the 7th The driving member 35 of the presser foot lifter swing rod 34 of O7 and the length direction along casing 8 or so extension；The presser foot lifter cam channel 48 For closed curve shape, for exporting presser foot lifter movement locus；The presser foot lifter roller 324 is embedded in the presser foot lifter cam of overhead cam 4 It is engaged in sliding slot 48 and with presser foot lifter cam channel 48, the presser foot lifter movement locus for overhead cam 4 to be exported passes to lift Presser feet drives crank 32, the lower end of presser foot lifter swing rod 34 to be driven to swing；The left end of the driving member 35 and presser foot lifter swing rod 34 Upper end be hinged, therefore the swing of presser foot lifter swing rod 34 can drive driving member 35 to act；The right end of driving member 35 is held with presser foot lifter Row component 36 is connected, presser bar 361 is driven to move up or move down, and bleeds off pressure so as to fulfill upward presser foot lifter or downwards foot.

Preferably, the driving member 35 can be connecting rod, or the presser foot lifter machine shown in steel wire rope, Figure 14 and Figure 15 In structure 3, driving member 35 is a kinematic link.Vertically extension, presser foot lifter swing rod 34 pass through one to the presser foot lifter swing rod 34 up and down The fixed pin of the front and rear extension of root is rotatably connected at casing 8, alternatively, presser foot lifter swing rod 34 passes through the fixation that extends before and after one Pin is rotatably connected at a fixed plate, which is fixed on casing 8, therefore fixed pin is fixed for the 7th of presser foot lifter swing rod 34 Swing pivot O7.

Preferably, as shown in Figure 16 and Figure 17, the rear end of the presser foot lifter driving crank 32 passes through with presser foot lifter swing rod 34 A connection piece is connected, and the adapter 33 includes adapter body part 331 and erected from the lower end of adapter body part 331 The adapter axle portion 332 directly extended downwardly is fixed with one in one end of the presser foot lifter swing rod 34 along before the width of casing 8 The presser foot lifter fixed pin 333 extended afterwards, the adapter axle portion 332 is rotatable and can axially movably be threaded through presser foot lifter up and down In the other end for driving crank 32, the presser foot lifter fixed pin 333 is rotatable and front and rear can axially movably be threaded through adapter In body part 331.In addition, presser foot lifter driving crank 32 includes crank body portion 321, from the periphery in crank body portion 321 The the first crank arm 322 extended substantially forward and the second crank extended generally rearward from the periphery in crank body portion 321 Arm 323, the swing link pin 334 that the crank body portion 321 of presser foot lifter driving crank 32 extends by about one is rotationally Motor mounting plate 81 is connected to, therefore swing link pin 334 forms the 6th fixation swing pivot O6 of presser foot lifter driving crank 32, the lift Presser feet roller 324 is rotatably connected at the first crank arm of presser foot lifter driving crank 32 by the screw of about one extension 322 front end, the adapter axle portion 332 of the adapter 33 is rotatable and can axially movably be threaded through presser foot lifter drive up and down The rear end of second crank arm 323 of dynamic crank 32.The lower end of the presser foot lifter driving crank 32 is equipped with a torsional spring 335, described The both ends of torsional spring 335 are connected to the second crank arm 323 and motor mounting plate 81, and torsional spring 335 is used to drive presser foot lifter Crank 32 apply an active force so that presser foot lifter driving crank 32 front end close to overhead cam 4 presser foot lifter cam channel 48, So that the presser foot lifter roller 324 of 32 front end of presser foot lifter driving crank is close to the slot week of presser foot lifter cam channel 48 always Face ensures the accuracy and reliability of power transmission.

Further, as shown in fig. 16 and 18, the presser foot lifter executive module 36 includes having the 8th to fix swing branch The presser feet lifting and swinging bar 362 of point O8, presser feet lifting linking member 363 are fixed on the guide plate 365 of casing 8 and stent 367, institute The first guide groove 366 for offering in guide plate 365 and extending up and down is stated, the front end face of the stent 367 is dashed forward forward equipped with one The sliding block 368 gone out, the presser bar 361 are fixed in stent 367；The presser feet lifting and swinging bar 362 is generally L-shaped, institute The right end and the upper end in 362 left side of presser feet lifting and swinging bar for stating driving member 35 are hinged, 362 right side of presser feet lifting and swinging bar Lower end and the upper end of presser feet lifting linking member 363 be hinged, the lower end of the presser feet lifting linking member 363 is hinged with sliding block 368, institute It states sliding block 368 to be located in the first guide groove 366 of guide plate 365 and can slide up and down in the first guide groove 366, i.e. presser feet Lifting and swinging bar 362, presser feet lifting linking member 363, the stent 367 with sliding block 368 and leading with the first guide groove 366 A slider-crank mechanism is formed to plate 365.In addition, the driving member 35 and presser feet lifting and swinging bar 362, presser feet lifting and swinging bar 362 are hinged with presser feet lifting linking member 363 by the axial screw 9 of front and rear extension.

Preferably, as shown in fig. 16 and 18, the regulating tank of about one extension is offered in the presser feet lifting linking member 363 364, the axial screw 9 for hinged presser feet lifting and swinging bar 362 and presser feet lifting linking member 363 is threaded through the regulating tank 364 In；A compression spring is cased on the presser bar 361, is not shown in figure, the upper and lower ends of the compression spring are born against in casing 8 and branch Frame 367.In presser foot lifter and during bleeding off pressure foot, since presser feet is not in contact with cloth, therefore the pressure of compression spring all acts on On stent 367, so that the axial screw 9 being threaded through in regulating tank 364 leans always in the upper edge of regulating tank 364, it is accurate It really performs presser foot lifter action and bleeds off pressure foot-propelled work.After presser feet is put down, then presser feet and cloth are in contact, then the pressure of compression spring by Cloth and needle plate are born, therefore the upper edge of the axial screw 9 being threaded through in regulating tank 364 and regulating tank 364 can unclamp.Due to adjusting Slot 364 is the strip grooves of about one extension, therefore it enables foot lifting mechanism to be suitable for the cloth of different-thickness, and is also convenient for Adjust the stroke that presser bar 361 is moved up or moved down.

Further, as shown in Figure 14 to Figure 16, the foot lifting mechanism 3, which further includes, to be acted on presser foot lifter swing rod 34 and passes The presser foot lifter height adjustment assembly 37 of the hinge joint of moving part 35, presser foot lifter height adjustment assembly 37 are used to adjust presser foot lifter swing rod 34 With the high and low position of the hinge joint of driving member 35, put so as to adjust the hinge joint of presser foot lifter swing rod 34 and driving member 35 with presser foot lifter The 7th of bar 34 fixes the length between swing pivot O7, and then adjusts presser foot lifter swing rod 34 and drive 35 amplitude of fluctuation of driving member Size, the final driving member 35 that adjusts drive the stroke that presser bar 361 is moved up or moved down in presser foot lifter executive module 36, realize lift Presser feet height is adjusted so that foot lifting mechanism can be suitable for the cloth of different-thickness, and then ensure that lockstitch button holder being capable of normal work Make and with higher work efficiency.

Specifically, after presser foot lifter height is adjusted, lockstitch button holder is in operation process, the driving lift of presser foot lifter drive component 31 The lower end of presser feet swing rod 34 is swung, so that the upper end of presser foot lifter swing rod 34 is also swung.When passing through presser foot lifter height adjusting group When part 37 makes the hinge joint of presser foot lifter swing rod 34 and driving member 35 be located at high-order, then presser foot lifter swing rod 34 and driving member 35 are hinged 7th length fixed between swing pivot O7 of point and presser foot lifter swing rod 34 is longer, therefore the amplitude of fluctuation of 34 upper end of presser foot lifter swing rod Spend the row larger, presser foot lifter swing rod 34 is moved up or moved down by presser bar 361 in the driving presser foot lifter of driving member 35 executive module 36 Cheng Zengjia, suitable for thin material.When the hinge joint for making presser foot lifter swing rod 34 and driving member 35 by presser foot lifter height adjustment assembly 37 During positioned at low level, then the hinge joint of presser foot lifter swing rod 34 and driving member 35 fixes swing pivot O7 with the 7th of presser foot lifter swing rod 34 Between length it is shorter, therefore the amplitude of fluctuation of 34 upper end of presser foot lifter swing rod is smaller, and presser foot lifter swing rod 34 is driven by driving member 35 The stroke that presser bar 361 is moved up or moved down in presser foot lifter executive module 36 reduces, and expects suitable for thickness.

Further, as shown in Figure 14 to Figure 16, the presser foot lifter height adjustment assembly 37 includes moving up and down lead Rail plate 38, the connecting pin 311 for driving operating parts that guide-rail plate 38 moves up and down and front and rear extension；The guide-rail plate 38 With the first guide-rail plate arm 381 and the second guide-rail plate arm 382 being arranged in parallel, the first guide-rail plate arm 381 and second is led Rail plate arm 382 is all along the length direction of casing 8 or so extension, therefore the first guide-rail plate arm 381 and the second guide-rail plate arm 382 It is front and rear to be oppositely arranged；The operating parts is connected with the first guide-rail plate arm 381, drives and is moved down on the first guide-rail plate arm 381 It is dynamic；The upper end of the second guide-rail plate arm 382, the left end of driving member 35 and presser foot lifter swing rod 34 passes through the connecting pin 311 are hinged, therefore the hinge joint that connecting pin 311 is the presser foot lifter swing rod 34 and driving member 35, in the presser foot lifter swing rod 34 The first sliding groove 341 extended up and down along the length direction of presser foot lifter swing rod 34 is offered, the second guide-rail plate arm 382 opens up There is the second sliding slot 384 extended along 382 length direction of the second guide-rail plate arm or so, the connecting pin 311 is threaded through the first cunning In 341 and second sliding slot 384 of slot；The front end of connecting pin 311 is further fixed on the baffle ring for being located at 382 front side of the second guide-rail plate arm 342.When operating parts moves up and down the first guide-rail plate arm 381, then guide-rail plate 38 is whole moves up and down, therefore guide-rail plate 38 Second guide-rail plate arm 382 also synchronously moves up and down, so as to drive presser foot lifter swing rod 34,35 and second guide-rail plate arm of driving member The hinge joint of 382 three of portion also synchronously moves up and down, that is, adjusts connecting pin 311 in 341 and second sliding slot 384 of the first sliding groove Position namely adjustment connecting pin 311 and presser foot lifter swing rod 34 the 7th fix spacing between swing pivot O7.

Preferably, as shown in Figure 14 to Figure 16, the presser foot lifter height adjustment assembly 37 further includes mounting bracket 39, the installation Frame 39 is including the mutually fixed mounting bracket fixed part 391 in top with casing 8 and offers the second guide groove extended up and down 393 mounting bracket guide part 392, the guide-rail plate 38, which also has, is located at the first guide-rail plate arm 381 and the second guide-rail plate arm Guide-rail plate body part 383 between 382, therefore guide-rail plate body part 383 extends along before and after the width of casing 8, the first guide rail Plate arm 381 is located at the front end of guide-rail plate body part 383, after the second guide-rail plate arm 382 is located at guide-rail plate body part 383 At end；Guide blot 310 is fixed on the guide-rail plate body part 383, the guide blot 310 is threaded through mounting bracket guide part In 392 the second guide groove 393 and head of guide blot 310 is located at outside the second guide groove 393, and the composition of guide blot 310 is led The track of rail plate 38 can improve operating parts by the mutual cooperation of 310 and second guide groove 393 of guide blot and drive guide-rail plate 38 The Stability and veracity moved up and down, and then improve accuracy and accuracy that presser foot lifter height is adjusted.

Preferably, as shown in Fig. 1 and Figure 14, the operating parts be installed in rotation in the front surface of casing 8 for one and Can fast clutch adjusting knob 7, which includes the eccentric axial portion 741 of eccentric setting, i.e., eccentric axial portion 741 is eccentric In being offered on the pivot center of adjusting knob 7, the first guide-rail plate arm 381 along 381 length side of the first guide-rail plate arm The 3rd sliding slot 385 extended to the left and right, the eccentric axial portion 741 are threaded through in the 3rd sliding slot 385.When rotating adjusting knob 7, institute Stating eccentric axial portion 741 drives the first guide-rail plate arm 381 to move up and down, while eccentric axial portion 741 is left also in the 3rd sliding slot 385 Right slip so as to adjust the high and low position of presser foot lifter swing rod 34 and the hinge joint of driving member 35, and then realizes presser foot lifter height tune Section.

Can the concrete structure of adjusting knob 7 of fast clutch be：

Can fast clutch adjusting knob 7 include be fixed on 8 inner wall of casing adjust limiting plate 71, the width along casing 8 The shaft 72 of the front and rear extension in degree direction, the regulating wheel 74 for being fixed on the knob 73 of 72 front end of shaft, being fixed on 72 rear end of shaft, with And positioned at knob 73 and adjust the spring 75 between limiting plate 71；The shaft 72 is rotationally threaded through casing 8 and adjusts and limits In the plate 71 of position；The spring 75 is axially extending along the longitudinal direction and in compressive state, therefore spring 75 is a compression spring；The rotation Button 73, spring 75, adjusting limiting plate 71 and regulating wheel 74 are arranged successively from front to back, and knob 73 and spring 75 are located at casing 8 Outside, adjusts limiting plate 71 and regulating wheel 74 is located inside casing 8, and the eccentric axial portion 741 is located at regulating wheel 74 backwards to adjusting On the rear end face of limiting plate 71；Furthermore the regulating wheel 74 is equipped with what is protruded forward towards the front end face for adjusting limiting plate 71 Spacing teat, offer towards regulating wheel 74 on the rear end face for adjusting limiting plate 71 and with the matched /V of spacing teat Recess portion.When pressing knob 73 backward, knob 73 drives regulating wheel 74 synchronously to move backward by shaft 72, therefore regulating wheel 74 On spacing teat be separated with adjusting the /V recess portion on limiting plate 71, operator's turning knob 73 at this time, then knob 73 By shaft 72 regulating wheel 74 is driven synchronously to rotate, then the high and low position of eccentric axial portion 741 is changing, so as to synchronously drive Guide-rail plate 38 is moved up or moved down, and is completed presser foot lifter height and is adjusted.After presser foot lifter height is adjusted, knob 73 is unclamped, due to bullet Spring 75 is in the state of compression, therefore spring 75 applies an active force facing forward to knob 73, and knob 73 is in the active force of spring 75 Lower move forward resets, then knob 73 drives regulating wheel 74 synchronously to move forward reset by shaft 72, so that adjusting Spacing teat on wheel 74 is engaged with adjusting the /V recess portion on limiting plate 71, then regulating wheel 74 can not rotate so that adjust 7 self-locking of knob, knob 73 can not rotate, and also can not just adjust presser foot lifter height.Therefore, above-mentioned adjusting knob 7 by pressing or Unclamp knob 73 can quickly realize regulating wheel 74 and adjust limiting plate 71 between clutch, and then can when unclamping knob 73, By the spacing teat in regulating wheel 74 with adjust limiting plate 71 on /V recess portion be engaged adjusting knob 7 generally in Self-locking state, therefore its self-locking is reliable and stable, so as to ensure that foot lifting mechanism 3 can be transported reliably after presser feet height is adjusted Row；In addition, when adjusting presser foot lifter height using above-mentioned adjusting knob 7, simultaneously turning knob 73 need to be only pressed, it is easy to operate fast It is prompt.

Further, as shown in Figure 24 to Figure 26, further include one and be fixed on the graduated scale being located on casing 8 outside casing 8 Disk 76, therefore between the scale bidding quotation 76 is located at knob 73 and adjusts limiting plate 71, it is further opened with holding bullet on the scale bidding quotation 76 The through hole 761 that spring 75 and shaft 72 pass through；The front surface of the scale bidding quotation 76 is equipped with to represent the quarter of presser foot lifter height Degree when pressing simultaneously turning knob 73 backward, makes the pointer on knob 73 be directed at some scale on scale bidding quotation 76, unclamps again rotation Button 73, then the pointer on knob 73 be targeted by new scale, entire presser foot lifter height adjustment assembly 37 also achieves self-locking, and then Personnel easy to operation carry out the operation of presser foot lifter height adjusting.Preferably, the scale bidding quotation 76, casing 8 and adjusting /V 71 three of plate is mutually fixed by the fixing screws of multiple front and rear extensions；The knob 73 and shaft 72, shaft 72 and regulating wheel 74 It is mutually fixed by multiple fixing screws radially extended along shaft 72.

Preferably, Figure 25 is seen, the knob 73 is equipped with the guiding to extend back towards the rear end face for adjusting limiting plate 71 Axle portion 74, the spring 75 are sleeved in shaft 72, and the front end sleeve of spring 75 is in the guiding axle portion 74 of knob 73, spring 75 Rear end is resisted against on the front end face of casing 8, so as to improve unclamp knob 73 after, spring 75 make knob 73 move forward reset standard True property.

In the application, form that there are many spacing teats of regulating wheel 74 and the /V recess portion for adjusting limiting plate 71：/V is dashed forward The form one of portion and /V recess portion, as illustrated in figs. 25 and 26, what the spacing teat in the regulating wheel 74 extended forward for one Limit bolt 742, the /V recess portion adjusted on limiting plate 71 is multiple limit holes 711；When unclamping knob 73, the limit The end of position bolt 742 is inserted in a limit hole 711 in multiple limit holes 711, so as to limit regulating wheel 74 and knob 73 Rotation；More preferably, the rear end face for adjusting limiting plate 71 towards regulating wheel 74 is equipped with two backing pins to extend back 712, respectively at the both ends of /V recess portion, i.e., multiple limit holes 711 are located between two backing pins 712 two backing pins 712, During knob 73 drives the rotation of regulating wheel 74, backing pin 712 is used to limit the rotation of 74 upper limit bolt 742 of regulating wheel, makes Obtaining limit bolt 742 can only rotate in the range of having limit hole 711, also limit the slewing area of knob 73./V is dashed forward The form two of portion and /V recess portion, as shown in figure 27, the spacing teat in the regulating wheel 74 are a gear part 743, the tune It is a gear grooved being adapted with gear part 743 to save the /V recess portion on limiting plate 71；When unclamping knob 73, the gear part 743 are located in gear grooved, so as to limit the rotation of regulating wheel 74 and knob 73.The form three of spacing teat and /V recess portion, such as Shown in Figure 28 or Figure 29, the spacing teat in the regulating wheel 74 is a polygonal portion 744, the limit adjusted on limiting plate 71 Position recess portion is a polygon groove being adapted with polygonal portion 744；When unclamping knob 73, the polygonal portion 744 is located at more In the shape slot of side, so as to limit the rotation of regulating wheel 74 and knob 73；More preferably, the spacing teat in regulating wheel 74 is just polygon Shape portion 744, it is a regular polygon slot being adapted with regular polygon portion 744 to adjust the /V recess portion on limiting plate 71.Certainly, institute It states spacing teat and the other forms such as spline also can be used with /V recess portion.

The operation principle of foot lifting mechanism 3 is as follows：

Figure 19 is the schematic diagram of foot lifting mechanism 3 in the application, the knot with the foot lifting mechanism 3 shown in Figure 14 to Figure 16 Composition is compared, and the presser foot lifter driving crank 32 is K-J-I, and adapter 33 is I-H, and presser foot lifter swing rod 34 is H-G-F, Connecting pin 311 is F, and the second sliding slot 384 on the second guide-rail plate arm 382 is F-M, and mounting bracket 39 is P-Q, adjusts rotation Button 7 is O-N, and the knob 73 in adjusting knob 7 is O, and the eccentric axial portion 741 in adjusting knob 7 is N, driving member 35 It is F-E, presser feet lifting and swinging plate is E-A-B, and presser feet lifting linking member 363 is B-C, and presser bar 361 is C-D, and J is The 6th of presser foot lifter driving crank 32 fixes swing pivot O6O, and G is the 7th fixation swing pivot O7O of presser foot lifter swing rod 34, A is the 8th fixation swing pivot O8O of presser feet lifting and swinging bar 362.As can be seen from Figure 19：As presser foot lifter swing rod 34 (H-G-F) When being driven and swung by presser foot lifter driving crank 32 (K-J-I) and adapter 33 (I-H), connecting pin 311 (F) can be slided along second Slot 384 (F-M) slides；And the height of the guide-rail plate 38 where the second sliding slot 384 (F-M) can edge by adjusting knob 7 (O-N) Mounting bracket 39 (P-Q) to move up and down, when the guide-rail plate 38 where the second sliding slot 384 (F-M) is in a high position, F-G longer, F point Amplitude of fluctuation it is also larger, then driving member 35 (F-E) driving presser bar 361 (C-D) formation for moving up or moving down is just larger, lift pressure Foot height is just higher；On the contrary, when the guide-rail plate 38 where the second sliding slot 384 (F-M) is in low level, F-G is shorter, the pendulum of F points Dynamic amplitude is also smaller, then the formation that driving member 35 (F-E) driving presser bar 361 (C-D) is moved up or moved down is just smaller, and presser foot lifter is high Degree is just than relatively low；After adjusting, N points are lockable, and presser foot lifter is highly kept fixed, in other words, only when needs adjust lift pressure During foot height, just need to change N points, the height of F-M, under remaining state, the height of N points and F-M are all kept fixed.Described second The shape of sliding slot 384 (F-M) can be camber line, spline curve, straight line or oblique line etc., as long as foot lifting mechanism 3 can meet use It is required that.The cell wall of the connecting pin 311 (F) and the second sliding slot 384 (F-M) on the second guide-rail plate arm 382 can be direct Contact can also realize mediate contact by covering a rotatable sliding block 368 in the periphery of connecting pin 311.

Further, in the schematic diagram of the foot lifting mechanism 3 shown in Figure 19, the guide-rail plate 38 where the second sliding slot 384F-M Height and position controlled by external action point N, the controlled way of N points in the presser foot lifter height adjustment assembly 37 shown in Figure 19 For：It is realized, can also be realized by other means by the eccentric axial portion 741 of the adjusting knob 7；Such as：Figure 20 institutes In the presser foot lifter height adjustment assembly 37 shown, the controlled way of N points is：It is realized by threaded adjusting；Alternatively, Figure 21 and Figure 22 institutes In the presser foot lifter height adjustment assembly 37 shown, the controlled way of N points is：It is realized by spanner T-O-N, O is the fixation of spanner Swing pivot, T ends are located at the outside of casing 8, pull the T ends of spanner, you can the N-terminal of spanner is driven to move up or move down, realizes lift Presser feet height is adjusted.

Further, as shown in figure 23, the presser foot lifter cam channel 48 includes the presser foot lifter section 482 that ending is sequentially connected With bleed off pressure foot section 483, since foot lifting mechanism 3 needs to share a driving motor 6 with upper thread cutting mechanism 1 and lower thread cutting mechanism 2, Therefore presser foot lifter cam channel 48 further includes presser foot lifter idle stroke section 481.The changing rule of 48 radius of presser foot lifter cam channel is：Lift The radius of presser feet section 482 gradually increases, and the radius for bleeding off pressure foot section 483 is gradually reduced, and the reducing of presser foot lifter idle stroke section 481 is not Become.When presser foot lifter roller 324 is engaged with the slot circumferential surface of presser foot lifter idle stroke section 481, presser foot lifter driving crank 32 is failure to actuate, Presser feet is the state put down, and in this state, lockstitch button holder performs sewing action, cuts the action of upper thread line and cuts bottom line action.Work as lift When presser feet roller 324 is engaged with the slot circumferential surface of presser foot lifter section 482, presser foot lifter drives crank 32 to fix swing pivot O6 around the 6th Clockwise oscillation, presser foot lifter drive crank 32 to drive presser foot lifter swing rod 34 inverse around the 7th fixation swing pivot O7 by adapter 33 Hour hands are swung, and presser foot lifter swing rod 34 drives presser feet lifting and swinging bar 362 inverse around the 8th fixation swing pivot O8 by driving member 35 Hour hands are swung, and presser feet lifting linking member 363 and stent 367 are driven under the action of the first guide groove 366 and sliding block 368 cooperate It moves upwardly together, presser bar 361 and presser feet is driven synchronously to move up, realize presser foot lifter.When presser foot lifter roller 324 is with putting When the slot circumferential surface of presser feet section 483 is engaged, presser foot lifter drives crank 32 to fix swing pivot O6 counter-clockwise swings, lift pressure around the 6th Foot drives crank 32 by adapter 33 presser foot lifter swing rod 34 to be driven to fix swing pivot O7 clockwise oscillations, presser foot lifter around the 7th Swing rod 34 drives presser feet lifting and swinging bar 362 to fix swing pivot O8 clockwise oscillations around the 8th by driving member 35, first Guide groove 366 and sliding block 368 drive presser feet lifting linking member 363 and stent 367 to move downwardly together under the action of cooperating, and drive Dynamic pressure foot lever 361 and presser feet synchronously move down, and realization bleeds off pressure foot.Therefore, the action sequence of presser bar 361 is：Origin is The state → presser foot lifter → that presser feet is put down bleeds off pressure foot, Aligning control.

In the present embodiment, trimming cam channel 42, first time trimming are convex on trimming cam channel 41, second on described first It is as shown in figure 30 to take turns the trail change of sliding slot 51, second time trimming cam channel 52 and presser foot lifter cam channel 48, certainly, In various sizes of lockstitch button holder, the trail change of above-mentioned five cam channels would also vary from.It is above to cut shown in Figure 31 The sequence diagram that line mechanism 1, lower thread cutting mechanism 2 and foot lifting mechanism 3 act, as can be seen from Figure 31：After lockstitch button holder starts, driving motor 6 driving overhead cams 4 and lower cam 5 rotate, at this point, presser foot lifter roller 324 and presser foot lifter cam channel 48 bleed off pressure 483 phase of foot section Coordinate, trimming roller 131 is all engaged with upper trimming idle stroke section 47 on trimming roller 121 and second on first, is cut under first Line roller 221 and second time trimming roller 231 are all engaged with lower trimming idle stroke section 57, therefore the execution of foot lifting mechanism 3 is bled off pressure Foot-propelled is made, and upper thread cutting mechanism 1 and lower thread cutting mechanism 2 are failure to actuate；After seam a distance is played, upper cutting assemblies 143 open, then Lower scissors component opens；After a distance of going further, upper cutting assemblies 143 and lower scissors component are all moved to respective position to be cut It puts；It treats sewing finishing, is slided by trimming cam channel 42, first time trimming cam on trimming cam channel 41, second on first Slot 51 and the driving of second time 52 track of trimming cam channel, upper cutting assemblies 143 first cut upper thread, in upper cutting assemblies 143 When action closes to an end, lower scissors component starts to cut bottom line；After upper thread cutting, lower scissors component just starts pipeline purging and cuts Remaining the end of a thread of upper thread can so be pulled down, reduce the end of a thread of upper thread by line；It treats to go up 143 He of cutting assemblies after trimming Lower scissors component all begins to return to respective origin；Afterwards, foot lifting mechanism 3 starts presser foot lifter at once, treats that presser feet lifts to highest Behind position, a Xun Huan is completed.

In conclusion the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.

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 Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as Into all equivalent modifications or change, should by the present invention claim be covered.

Claims

1. a kind of lockstitch button holder, including be used to cutting upper thread upper thread cutting mechanism (1), for cut the lower thread cutting mechanism (2) of bottom line and For the foot lifting mechanism (3) of presser foot lifter, it is characterised in that：The upper thread cutting mechanism (1) include upper trimming drive component (11), And it is connected with upper trimming drive component (11) and by the upper trimming executive module of upper trimming drive component (11) drive actions (14), the lower thread cutting mechanism (2) includes lower trimming drive component (21) and is connected simultaneously with lower trimming drive component (21) By the lower trimming executive module (24) of lower trimming drive component (21) drive actions, the foot lifting mechanism (3) includes presser foot lifter Drive component (31) and it is connected with presser foot lifter drive component (31) and by the lift of presser foot lifter drive component (31) drive actions Presser feet executive module (36), the upper trimming drive component (11), lower trimming drive component (21) and presser foot lifter drive component (31) all by same driving motor (6) drive actions.

2. lockstitch button holder according to claim 1, it is characterised in that：Further include overhead cam (4) and lower cam (5), it is described on Cam (4) and lower cam (5) are all directly or indirectly driven rotation, the upper trimming drive component (11) by driving motor (6) All it is connected with presser foot lifter drive component (31) with overhead cam (4), the lower trimming drive component (21) is connected with lower cam (5) It connects.

3. lockstitch button holder according to claim 2, it is characterised in that：The driving motor (6) is installed and to be vertical with upper The motor output shaft of lower extension, the upper and lower ends of the motor output shaft of the driving motor (6) are respectively from the electricity of driving motor (6) It stretches out and extends downwardly upwards in machine shell, the overhead cam (4) is fixed on the upper end of motor output shaft, and lower cam (5) is solid It is scheduled on the lower end of motor output shaft.

4. lockstitch button holder according to claim 2, it is characterised in that：The upper trimming executive module (14) includes the first rocking bar (141), the second rocking bar (142) and the upper cutting assemblies (143) for cutting upper thread, the upper trimming drive component (11) include opening Trimming cam channel (42) on trimming cam channel (41) and second is located on first on overhead cam (4), trimming drives on first Trimming group of drive rods (13) in lever group (12) and second；Trimming on trimming cam channel (41) and second on described first Trimming cam channel (42) is all on trimming cam channel (41) and second all for closed curve shape, and on first for cam channel (42) Upper trimming including being sequentially connected end to end in turn cuts across section (43), upper trimming section to be cut (44), upper stitch scissors line segment (45) and upper trimming Reset section (46)；Trimming group of drive rods (12) is equipped with trimming roller (121) on rotatable first on described first, and described the It is slided on one on the first of the embedded overhead cam (4) of trimming roller (121) in trimming cam channel (41) and with trimming cam on first Slot (41) is engaged, and the end of trimming group of drive rods (12) is hinged, with the first rocking bar (141) for control on described first The folding of cutting assemblies (143)；Trimming group of drive rods (13) is equipped with trimming roller on rotatable second on described second (131), on described second the embedded overhead cam (4) of trimming roller (131) second in trimming cam channel (42) and with second Upper trimming cam channel (42) is engaged, and the end of trimming group of drive rods (13) is mutually cut with scissors with the second rocking bar (142) on described second It connects, for controlling walking for upper cutting assemblies (143).

5. lockstitch button holder according to claim 4, it is characterised in that：Trimming group of drive rods (12) includes first on described first Trimming connecting rod (123) on the first of upper trimming driving crank (122) and bending extension, trimming drives crank on described first (122) one end has first to fix swing pivot (O1), the other end and first of trimming driving crank (122) on described first One end of upper trimming connecting rod (123) is hinged, the other end of trimming connecting rod (123) and the first rocking bar (141) phase on first Hinged, trimming roller (121) is installed in rotation on first on trimming driving crank (122) on described first.

6. lockstitch button holder according to claim 4, it is characterised in that：Trimming group of drive rods (13) includes second on described second Trimming connecting rod (133) on the second of upper trimming driving crank (132) and bending extension, trimming drives crank on described second (132) one end has second to fix swing pivot (O2), the other end and second of trimming driving crank (132) on described second One end of upper trimming connecting rod (133) is hinged, the other end of trimming connecting rod (133) and the second rocking bar (142) phase on second Hinged, trimming roller (131) is installed in rotation on second on trimming driving crank (132) on described second.

7. lockstitch button holder according to claim 4, it is characterised in that：On described first on trimming cam channel (41) and second Trimming cam channel (42) is opened in respectively on the upper surface and lower face of overhead cam (4).

8. lockstitch button holder according to claim 4, it is characterised in that：The change of trimming cam channel (41) radius on described first Law is：The radius that upper trimming cuts across section (43) is first gradually reduced and gradually increases afterwards, and the radius of upper trimming section to be cut (44) is first It is gradually increased after being gradually reduced, the radius of upper stitch scissors line segment (45) is gradually reduced and there is tail end trimming cam on first to slide The radius minimum value of slot (41) gradually increases after the radius of upper trimming reset section (46) is first constant.

9. lockstitch button holder according to claim 4, it is characterised in that：The change of trimming cam channel (42) radius on described second Law is：Upper trimming cut across section (43) radius it is first constant after be gradually reduced, the radius of upper trimming section to be cut (44) is first gradual Constant after increase, the radius of upper stitch scissors line segment (45) gradually increases and tail end has trimming cam channel (42) on second Radius maximum, the radius of upper trimming reset section (46) are gradually reduced.

10. lockstitch button holder according to claim 4, it is characterised in that：Trimming cam channel (41) and second on described first Upper trimming cam channel (42) also all includes upper trimming idle stroke section (47), and the upper trimming idle stroke section (47) is located at upper trimming Between reset section (46) and upper trimming cut across section (43), the radius of the upper trimming idle stroke section (47) is constant.

11. lockstitch button holder according to claim 2, it is characterised in that：The lower trimming executive module (24) is cut including first Knife control panel (241), the second scissors control panel (242) and the lower scissors component for cutting bottom line, the lower trimming drive component (21) include being opened in first time trimming cam channel (51) in lower cam (5) and second time trimming cam channel (52), the Once trimming group of drive rods (22) and second time trimming group of drive rods (23)；First time trimming cam channel (51) and Second time trimming cam channel (52) is all closed curve shape, and first time trimming cam channel (51) and second time trimming cam The lower trimming that sliding slot (52) all includes being sequentially connected end to end in turn cuts across section (53), lower trimming section to be cut (54), lower stitch scissors line segment (55) and lower trimming reset section (56)；First time trimming group of drive rods (22) is equipped with rotatable first time trimming roller (221), in first time trimming cam channel (51) of the embedded lower cam (5) of first time trimming roller (221) and with first Lower trimming cam channel (51) is engaged, end and the first scissors control panel of first time trimming group of drive rods (22) (241) it is hinged, the folding for controlling lower scissors component；Second time trimming group of drive rods (23) is equipped with rotatable Second time trimming roller (231), second time trimming cam channel of the embedded lower cam (5) of second time trimming roller (231) (52) it is engaged in and with second time trimming cam channel (52), the end of second time trimming group of drive rods (23) and the Two scissors control panels (242) are hinged, for controlling walking for lower scissors component.

12. lockstitch button holder according to claim 11, it is characterised in that：First time trimming group of drive rods (22) includes the Once trimming driving crank (222), the first crank connecting link (223) and the second crank connecting link (224) of bending extension, it is described One end of first time trimming driving crank (222) has the 3rd to fix swing pivot (O3), and first time trimming drives crank (222) the other end and the one end of the first crank connecting link (223) are hinged, the other end and second of the first crank connecting link (223) One end of crank connecting link (224) is mutually fixed, the other end of the second crank connecting link (224) and the first scissors control panel (241) It is hinged, first time trimming roller (221) is installed in rotation on first time trimming driving crank (222).

13. lockstitch button holder according to claim 11, it is characterised in that：Second time trimming group of drive rods (23) includes the Two times trimming driving cranks (232), the 3rd crank connecting link (233) and lower trimming connecting rod (234), second time trimming drive One end of dynamic crank (232) has the 4th to fix swing pivot (O4), the other end of second time trimming driving crank (232) It is hinged with one end of the 3rd crank connecting link (233), the other end of the 3rd crank connecting link (233) and lower trimming connecting rod (234) One end is hinged, and the other end of lower trimming connecting rod (234) is hinged with the second scissors control panel (242), and the lower trimming connects Bar (234) has the 5th to fix swing pivot (O5), and second time trimming roller (231) is cut under being installed in rotation on second On line driving crank (232).

14. lockstitch button holder according to claim 11, it is characterised in that：First time trimming cam channel (51) and second Lower trimming cam channel (52) is all opened on the lower face of lower cam (5), and first time trimming cam channel (51) is located at The inner ring side of second time trimming cam channel (52).

15. lockstitch button holder according to claim 11, it is characterised in that：First time trimming cam channel (51) radius Changing rule is：Lower trimming cut across section (53) radius it is first constant after be gradually reduced and tail end has first time trimming cam cunning The radius minimum value of slot (51), lower trimming first gradually increased wait the radius for cutting section (54) it is rear constant, lower stitch scissors line segment (55) Radius is constant, and the radius of lower trimming reset section (56) is constant.

16. lockstitch button holder according to claim 11, it is characterised in that：Second time trimming cam channel (52) radius Changing rule is：The radius that lower trimming cuts across section (53) is constant, and the radius of lower trimming section to be cut (54) is constant, lower stitch scissors line segment (55) radius gradually increases and tail end has the radius maximum of second time trimming cam channel (52), lower trimming reset section (56) radius is first gradually reduced rear constant.

17. lockstitch button holder according to claim 11, it is characterised in that：First time trimming cam channel (51) and second Lower trimming cam channel (52) also all includes lower trimming idle stroke section (57), and the lower trimming idle stroke section (57) is located at lower trimming Between reset section (56) and lower trimming cut across section (53), the radius of the lower trimming idle stroke section (57) is constant.

18. lockstitch button holder according to claim 2, it is characterised in that：The presser foot lifter executive module (36) has presser bar (361), the presser foot lifter drive component (31) is including offering the presser foot lifter cam channel (48) on overhead cam (4), having The presser foot lifter driving crank (32) of 6th fixation swing pivot (O6) is rotatably connected to presser foot lifter driving crank (32) one end Presser foot lifter roller (324), the other end of one end and presser foot lifter driving crank (32) is connected and fixed with the 7th and swing branch The presser foot lifter swing rod (34) of point (O7) and driving member (35), the presser foot lifter cam channel (48) is closed curve shape, described Match in the presser foot lifter cam channel (48) of the embedded overhead cam (4) of presser foot lifter roller (324) and with presser foot lifter cam channel (48) It closes, one end of the driving member (35) and the other end of presser foot lifter swing rod (34) are hinged, the other end of driving member (35) and lift Presser feet executive module (36) is connected, presser bar (361) is driven to move up or move down.

19. lockstitch button holder according to claim 18, it is characterised in that：The presser foot lifter driving crank (32) is put with presser foot lifter Bar (34) is connected by a connection piece, and the adapter (33) includes adapter body part (331) and from adapter body The adapter axle portion (332) that the lower end in portion (331) extends straight down is fixed with one in one end of the presser foot lifter swing rod (34) The presser foot lifter fixed pin (333) of front and rear extension, the adapter axle portion (332) is rotatable and is axially displaceably threaded through lift pressure In the other end of foot driving crank (32), the presser foot lifter fixed pin (333) is rotatable and is axially displaceably threaded through switching In part body part (331).

20. lockstitch button holder according to claim 18, it is characterised in that：The lower end of the presser foot lifter driving crank (32) is equipped with One torsional spring (335), the torsional spring (335) make presser foot lifter roller (324) be close to the slot circumferential surface of presser foot lifter cam channel (48).

21. lockstitch button holder according to claim 18, it is characterised in that：The presser foot lifter executive module (36) includes having the Eight fix the presser feet lifting and swinging bar (362), presser feet lifting linking member (363), the relatively-stationary guiding in position of swing pivot (O8) Plate (365) and stent (367) offer the first guide groove (366) extended up and down, the branch in the guide plate (365) Frame (367) is equipped with a sliding block (368) protruded, and the presser bar (361) is fixed in stent (367), the driving member (35) one end of the other end and presser feet lifting and swinging bar (362) is hinged, the other end of the presser feet lifting and swinging bar (362) It is hinged with the upper end of presser feet lifting linking member (363), the lower end of the presser feet lifting linking member (363) and sliding block (368) are hinged, institute Sliding block (368) is stated to be located in the first guide groove (366) of guide plate (365) and upper in the first guide groove (366) can glide It is dynamic.

22. lockstitch button holder according to claim 21, it is characterised in that：One is offered in the presser feet lifting linking member (363) The regulating tank (364) extended up and down, the presser feet lifting and swinging bar (362) are threaded through with presser feet lifting linking member (363) by one Axial screw (9) in the regulating tank (364) is hinged；Be cased with a compression spring on the presser bar (361), the compression spring up and down Both ends are born against in the casing (8) of lockstitch button holder and stent (367).

23. lockstitch button holder according to claim 18, it is characterised in that：The foot lifting mechanism (3), which further includes, acts on lift The presser foot lifter height adjustment assembly (37) of the hinge joint of presser feet swing rod (34) and driving member (35), presser foot lifter height adjustment assembly (37) it is used to adjust the high and low position of the hinge joint of presser foot lifter swing rod (34) and driving member (35).

24. lockstitch button holder according to claim 23, it is characterised in that：The presser foot lifter height adjustment assembly (37) includes can The guide-rail plate (38) that moves up and down, for driving the operating parts and connecting pin (311) that guide-rail plate (38) moves up and down, it is described Guide-rail plate (38) has the first guide-rail plate arm (381) and the second guide-rail plate arm (382) that are arranged in parallel, the operating parts and First guide-rail plate arm (381) is connected, the second guide-rail plate arm (382), one end of driving member (35) and presser foot lifter The other end of swing rod (34) is hinged by the connecting pin (311), is offered in the presser foot lifter swing rod (34) along presser foot lifter The first sliding groove (341) of the length direction extension of swing rod (34), the second guide-rail plate arm (382) are offered along the second guide rail The second sliding slot (384) of plate arm (382) length direction extension, the connecting pin (311) are threaded through the first sliding groove (341) and the In two sliding slots (384).

25. lockstitch button holder according to claim 23, it is characterised in that：The presser foot lifter height adjustment assembly (37) further includes Mounting bracket (39), the mounting bracket (39) include the mutually fixed mounting bracket fixed part (391) of casing (8) with lockstitch button holder, Yi Jikai Mounting bracket guide part (392) equipped with the second guide groove (393) extended up and down, the guide-rail plate (38), which also has, is located at first Guide-rail plate body part (383) between guide-rail plate arm (381) and the second guide-rail plate arm (382), the guide-rail plate body part (383) guide blot (310) is fixed on, the guide blot (310) is threaded through the second guiding of mounting bracket guide part (392) In slot (393).

26. lockstitch button holder according to claim 23, it is characterised in that：The operating parts for one can fast clutch adjusting rotation Button (7), adjusting knob (7) include the fixed adjusting limiting plate (71) in position, are rotationally threaded through in adjusting limiting plate (71) Shaft (72), be fixed on the knob (73) of shaft (72) one end, be fixed on shaft (72) other end regulating wheel (74) and Positioned at knob (73) and the spring (75) between limiting plate (71) is adjusted, the spring (75) is in compressive state, the adjusting It takes turns (74) and is equipped with spacing teat towards the end face for adjusting limiting plate (71), regulating wheel (74) adjusts limiting plate (71) backwards Other end is equipped with the eccentric axial portion (741) with shaft (72) eccentric setting, and court is offered on the adjusting limiting plate (71) To regulating wheel (74) and with the matched /V recess portion of spacing teat；When pressing knob (73), on the regulating wheel (74) Spacing teat is separated with adjusting the /V recess portion on limiting plate (71), and knob (73) drives regulating wheel (74) by shaft (72) It rotates；When unclamping knob (73), the spacing teat on the regulating wheel (74) is with adjusting the /V recess portion on limiting plate (71) It is engaged, adjusting knob (7) self-locking.

27. lockstitch button holder according to claim 26, it is characterised in that：Spacing teat on the regulating wheel (74) is a limit Position bolt (742), the /V recess portion adjusted on limiting plate (71) is multiple limit holes (711)；When unclamping knob (73), The end of the limit bolt (742) is inserted in a limit hole (711) in multiple limit holes (711) Nei.

28. lockstitch button holder according to claim 27, it is characterised in that：The limiting plate (71) that adjusts is towards regulating wheel (74) End face be equipped with two backing pins (712), two backing pins (712) respectively positioned at /V recess portion both ends at, for limiting State the rotation of limit bolt (742).