CN100513665C

CN100513665C - Cutting unit for sewing machine

Info

Publication number: CN100513665C
Application number: CNB031237452A
Authority: CN
Inventors: 曾贤长
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-20
Filing date: 2003-05-20
Publication date: 2009-07-15
Anticipated expiration: 2023-05-20
Also published as: CN1548603A

Abstract

The cutting unit for sewing machine has upper and lower cutter seat, and the upper cutter seat penetrates the stopper of the upper cutter driving unit and the elastic repositioning part and is fixed on the support on the stopper to obtain better support effect and shortened length. The cutter driving unit matching the stopper, the parallel pivot in the frame, and the steering part and driven part of the cutter driving unit constitute a high-stability four-bar mechanism. The lower cutter is fixed onto the fixed cutter slot and has one parallel pivot sleeved in the end to make the lower cutter stable.

Description

Sewing machines cut-off knife device

Technical field

The present invention relates to a kind of Sewing machines cut-off knife device, relate in particular to a kind of cut-off knife device with knee-action Qie Bubian.

Background technology

The fabric dividing limit device of present Sewing machines, because it has the last cut-off knife of knee-action Qie Bubian, cooperate fixed cut-off knife down, wherein, last cut-off knife is except on the needs, outside the following action, cut-off knife is still needed and is convenient to collect below to frame surface on it, sewing operation when need not the fabric dividing limit, therefore, last cut-off knife needs to consider to replace with the convenience of cut-off knife position in addition except that need take into account the stability of action smoothness up and down and Qie Bubian, and at the part of descending cut-off knife, then need consider to go up the mobile width with the adjustment selvedge of cut-off knife position, only so structure has following disappearance in fact, such as:

1. it is not enough to go up cut-off knife stability: be fixed on the tool rest by cut-off knife thereon, its tool rest then can be in transmission mechanism translation to adjust the position at cut-off knife place on it, therefore tool rest is except that need are made knee-action, more need do moving of level, therefore fastness and adjustable mobility when its tool rest must have stable, vertically-acting concurrently, and its tool rest wears the structural form of location merely, be difficult to reach this demand in fact, often there is improper defective of rocking to take place, causes Qie Bubian stability really.

2. descend cut-off knife force resistance and poor stability: its with single bolting on tool rest, and cut-off knife need be done moving of level under it, and when cooperating last cut-off knife to cut, the reaction force that Qie Bu produces, often make down fixing that the cut-off knife fixed structure can't be certain, and skew improperly takes place, cause the quality of Qie Bubian to reduce relatively even cut-out that can't be certain, be difficult to meet the requirement on the quality, so improved necessity is arranged.

In view of this, more steady in the use really for the last cut-off knife and the following cut-off knife that make Sewing machines, be to develop a kind of a kind of Sewing machines cut-off knife device that meets above-mentioned condition.

Summary of the invention

Main purpose of the present invention is to provide a kind of Sewing machines cut-off knife device, its by the dual-gripper of last cut-off knife seat performance and go up the cut-off knife transmission mechanism parallel four connecting rod forms make flowing mode, and the following high force resistance structure of the parallel support of cut-off knife multiple spot, and reach the practical purpose of the whole high stability high accuracy of this cut-off knife device.

For reaching above-mentioned purpose, technical characterictic provided by the invention is as follows:

A kind of Sewing machines cut-off knife device, wherein, the cut-off knife mechanism of Sewing machines denim cuttings, it is with power transmission shaft, cut-off knife transmission device cut-off knife in the start of cut-off knife mechanism in the cooperation; And cut-off knife mechanism is provided with the last cut-off knife stopping means and the following cut-off knife stopping means of interlock and fixing upper and lower cut-off knife in addition; It is characterized in that:

The stopper body of cut-off knife transmission device on is passed in fixing last cut-off knife seat end of going up cut-off knife, and the end in addition of last cut-off knife seat is placed through on the bracing frame, and is provided with elastic reset spare between bracing frame and stopper body.

Wherein, the stopper body pivot perforation of cut-off knife transmission device on is passed in last cut-off knife seat end, and be placed through supported hole on the bracing frame in the end of last cut-off knife seat, and the last cut-off knife seat between bracing frame and stopper body is provided with elastic reset spare and limit body, relative spacing hole and the limit shaft of being provided with bracing frame of its limit body.

Wherein, last cut-off knife transmission device is provided with the driving link of cam interlock form in the support final drive shaft, a driving link and an electronic-controlled power steering part articulate and drive, this electronic-controlled power steering part is hubbed at support, and establish connecting rod in other termination, and connecting rod is end and another electronic-controlled power steering part interlock in addition, and the electronic-controlled power steering part is hubbed on the parallel pivot, end is articulated in stopper body bottom in addition, and the stopper body cooperates an attached moving part and electronic-controlled power steering part and support to form the structural form of parallel four connection rod set.

Wherein, the following cut-off knife of following cut-off knife stopping means is fixed in down cut-off knife in conjunction with pedestal, and its down cut-off knife combine with following cut-off knife seat on the support in conjunction with pedestal, following cut-off knife then is placed on parallel drive-connecting shaft on the support in conjunction with pedestal.

By above-mentioned technical characterictic, make beneficial effect of the present invention as follows:

1. improve the high stability that goes up cut-off knife and the big span dual-gripper of last cut-off knife seat effect, to guarantee to cut the quality of cloth.

2. the length that goes up cut-off knife seat on the cut-off knife can effectively shorten, and reduces the number of so that whole structure is more simplified, so the possibility of rocking when last cut-off knife seat is adjusted reduces relatively, can effectively improve the stability of action.

3. effectively improve the transmission effect of strength by the interlock of each parallel member, can effectively improve the effect of start drag, cut the certain purpose of cloth angle and reach transmission.

4. can remain under the stable status and carry out Qie Bu, reach the high-quality demand of cloth of cutting.

5. when structural stability was high, the smoothness of moving between its member increased naturally, and the probability that vibration and mutual improper frictional impact destroy is reduced to minimum state, and effectively prolonged whole service life.

For further understanding structure of the present invention, feature and other purpose below cooperate preferred embodiment and accompanying drawing to be described in detail as follows:

Description of drawings

Fig. 1 is a three-dimensional appearance schematic diagram of the present invention.

Fig. 2 is that cut-off knife device of the present invention amplifies schematic perspective view.

Fig. 3 is a stero schematic diagram of the present invention.

Fig. 4 be of the present invention go up cut-off knife with and go up cut-off knife transmission device schematic diagram.

Fig. 5 is the generalized section that goes up cut-off knife and dependency structure thereof of the present invention.

Fig. 6 is an integral end view plane schematic diagram of the present invention.

Symbol description among the figure

10 Sewing machiness

11 supports, 110 pivots

111 first pivots

112 second pivots

12 cantilevers, 13 final drive shafts

Cut-off knife transmission device on 20

21 driving links, 22 fixtures

23 first electronic-controlled power steering parts, 24 connecting rods

25 second electronic-controlled power steering parts

26 stopper bodies, 260 pivot holes

261 fixing holes 262 are worn and are decided the hole

The perforation of 263 pivots

27 pivots

A cut-off knife mechanism

Cut-off knife stopping means on 30

Cut-off knife 310 is adjusted the hole on 31

311 adjust bolt

320 portions of cut-off knife seat on 32

321 stationary knife grooves, 322 pivot cover portions

33 return springs

34 limit bodies, 340 centre bores

341 spacing holes, 342 limit shafts

35 bracing frames

350 fixing holes, 351 gim pegs

352 dead axle holes, 353 supported holes

354 spacing holes

36 pivot dead axles, 361 locking parts

360 fixed parts, 362 pivot cover portions

37 attached moving parts

38 fixtures

40 times cut-off knife stopping means

42 times cut-off knives of 41 times cut-off knives are in conjunction with pedestal

420 stationary knife holes, 421 fixtures

422 extensions

423 wear the frame hole

43 times cut-off knife seat 430 stationary knife grooves

44 rotation axiss, 45 knobs

The specific embodiment

Please cooperate and consult shown in Fig. 1,2,3, Sewing machines 10 of the present invention, embodiment shown in the adjoint, it has platform-type support 11, support 11 has cantilever 12, and be provided with the A of cut-off knife mechanism of denim cuttings in addition in the below place that cantilever 12 ends are provided with car pin place, and support 11 is provided with the power transmission shaft 13 of power output, and the last cut-off knife 31 of the cut-off knife transmission device 20 drive cut-off knife A of mechanism moves cooperations in; The A of cut-off knife mechanism then is respectively arranged with cut-off knife stopping means 30, and following cut-off knife stopping means 40, and last cut-off knife 31 in the stream oriented device and following cut-off knife 41 can change the position at place, and guarantees that it changes the position at place, back; Wherein, the invention is characterized in the setting that cooperates with following cut-off knife stopping means 40 by cut-off knife stopping means 30 on it, have the function of more stable many strong points with following cut-off knife 41 so that go up cut-off knife 31.

Wherein, on support 11 walls of the present invention with respect to last cut-off knife transmission device 20, go up cut-off knife stopping means 30 and following cut-off knife stopping means 40 and be provided with length and being parallel to each other of a short pivot 110, two length, the first highly different parallel pivot 111 and the second parallel pivot 112 articulate action for relative structure fit.

And its support 11 is provided with cut-off knife transmission device 20, please cooperate Fig. 4,5, shown in 6, wherein be provided with the driving link 21 of a cam interlock form in final drive shaft 13, its cooperate ring-type fixture 22 with and fixture 22 on the screw lock of bolt, its driving link 21 bottoms and the first electronic-controlled power steering part, 23 horizontal ends are articulated to be driven, pivot 110 on the first electronic-controlled power steering part, 23 middle sections and the support 11 articulate cooperates ring-type fixture 230 with and on bolt be positioned rotation on this pivot 110, and the first electronic-controlled power steering part, 23 vertical end connect the connecting rod 24 of establishing horizontal direction in addition, connecting rod 24 end in addition cooperates C shape to buckle and the second electronic-controlled power steering part, 25 interlocks with pivot, the second electronic-controlled power steering part 25 is suitable with the first electronic-controlled power steering part, 25 structures, its vertical end bottom linkage rod 24 articulates, and the middle section cooperates fixture 250 to be hubbed on the first parallel pivot 111, the second electronic-controlled power steering part, 25 horizontal ends then are articulated in a stopper body 26 bottoms, its stopper body 26 bottoms are provided with pivot hole 260 relatively and fasten with the fitted bolt spiral shell and decide pivot 27 pivots and be placed in the second electronic-controlled power steering part, 25 opposed ends, make the drive stopper body 26 that the second electronic-controlled power steering part 25 can be certain.

And the design that the present invention is characterized in

stopper body

26 and 30 of last cut-off knife stopping means and following cut-off knife 41 with and go up the design that cut-off knife stopping means 40 cooperates two parallel pivots 111,112 of support 11 carry out so that structure that goes up cut-off knife 31 and following cut-off knife 41 of the present invention and holding function can remain under the stable status.

Wherein, of the present invention go up cut-off knife transmission device 20 stopper bodies 26 by pivot hole 260 in regular turn to being provided with fixing hole 261, wearing and decide hole 262 and pivot perforation 263, to keep supplying the 30 overall co-ordination settings of cut-off knife stopping means in order to the structure function that forms cut-off knife 31 forms in the high stability dual-gripper, shown in Fig. 3,4,5,6; And last cut-off knife 31 of cut-off knife stopping means 30 cooperates the screw lock of microscler adjustment holes 310, bottom and the adjustment bolt 311 of bolt form on it, cut-off knife 31 is fixed on one on the stationary knife groove 321 in the cut-off knife seat 32 bigger diameter end seat portions 320, and go up cut-off knife seat 32 in addition the end pivot cover portion 322 of stretching out thin footpath and wear the centre bore 340 and the bracing frame of limit body 34 of elastic reset spare 33, the ring-type of a coil spring form in addition in the end of passing pivot perforation 263 wearing pivot perforation 263; Bracing frame 35 is fixed on the stopper body 26,26 of bracing frame 35 and stopper bodies are provided with a pivot dead axle 36 in addition to articulate interlock one attached moving part 37, attached moving part 37 end in addition then is sheathed on the second parallel pivot 112, so that go up the structural form that cut-off knife transmission device 20 forms parallel four connection rod set, stopper body 26 can be made parallel mobile form with it and do moving up and down.

And wherein, the elastic reset spare 33 of last cut-off knife stopping means 30, the one end stretches into stopper body 26 pivots 263 inner radius of boring a hole, but the end elastic top is held on the limit body 34 in addition, make limit body 34 in addition end rely on bracing frame 35 opposing end faces, and on the structure of limit body 34 convexs, be provided with a spacing hole 341 in addition and reach spacing purpose to cooperate bracing frame 35 relative structures for the limit shaft 342 of elasticity tip form.

And its bracing frame 35 is the ㄣ font structure that plates bendings forms, and its bottom mainly is provided with a fixing hole 350 with respect to the fixing hole 261 of the internal thread form of stopper body 26 and passes for the fixture 351 of a bolt form and be fixed in person on its fixing hole 261; And the bottom of bracing frame 35 upper semisections place is provided with a fixing hole 352 in addition, has externally threaded fixed part 360 for a pivot dead axle 36 and cooperates the locking part 361 of the two groups of nut forms person thereon that locks; And the top of bracing frame 35 upper semisections place is provided with a supported hole 353 in centre in addition and passes with pivot cover portion 322 ends of keeping supplying cut-off knife seat 32, forms the dual-support structure form of big span; And be provided with two groups of spacing holes 354 for cooperating the limit shaft 342 on the limit body 34 to place spacing fixing in supported hole 353 peripheries.

And the pivot dead axle 36 on the aforementioned bracing frame 35 in addition end be that the pivot cover portion 362 of a smooth shaft volume morphing passes the end of an attached moving part 37 for pivot and enters 26 relative the wearing of stopper body and decides hole 262 and cooperate a bolting, make its pivot dead axle 36 entangle attached moving part 37 by certain pivot, more can make bracing frame 35 except that in bottom and stopper body 26 are affixed, by the two ends fixed engagement of pivot dead axle 36, make the fixing and one drive person that bracing frame 35 can be certain with stopper body 26 one; Attached moving part 37 is held then in addition, and pivot is placed on the second parallel pivot 112, and cooperate a ring-type fixture 38, attached moving part 37 location are hubbed on the second parallel pivot 112, make the horizontal ends of stopper body 26, the second electronic-controlled power steering part 25 and the structural form that attached moving part 37 forms parallel four connection rod set.

Following cut-off knife stopping means 40 then has cut-off knife 41, its down cut-off knife 41 cooperate two groups of bolting in cut-off knife once in conjunction with pedestal 42 tops, and its down cut-off knife be provided with in addition in conjunction with pedestal 42 middle sections that stationary knife hole 421 is passed with the fixture 421 of fitted bolt form and screw lock on the stationary knife groove 430 of cut-off knife seat 43 down, as Fig. 2, shown in 3, and cut-off knife stretches out an extension 422 in conjunction with pedestal 42 bottoms to the second parallel pivot 112 under it, and be provided with one in its extension 422 and wear frame hole 423 and wear for parallel pivot 112 with second, when cut-off knife 31 and following cut-off knife 41 are cut mutually, form the fulcrum of a drag by stationary knife hole 420, and its distance resisting moment of wearing the long distance of frame hole 423 formation far away, it is more stable when cutting selvedge to make down cut-off knife 41 and following cut-off knife combine pedestal 42.

And its down cut-off knife seat 43 in addition end stretch and penetrate support 11 walls, and stretch out a rotation axis 44, for a knob body 45 fixing usefulness of rotating control for the user by other end.

By aforementioned every structure Design, make the present invention can have following advantage, such as:

1. go up the high stability of cut-off knife 31 and last cut-off knife seat 32 big span dual-gripper effects: after promptly cut-off knife seat 32 passes the pivot perforation 263 of stopper body 26 on it, end is supported by the supported hole 353 of bracing frame 35 in addition, form the support effect of the big span of a pair of fulcrum, cut-off knife seat 32 stabilitys height very on it, so can be behind last cut-off knife 31 location, unlikely skew to some extent is to guarantee to cut the quality of cloth.

2. the length that goes up cut-off knife seat 32 on the cut-off knife 31 can effectively shorten: promptly cut-off knife seat 32 passes stopper body 26 and bracing frame 35 and not only can be effectively supports cut-off knife seat 32 with the support form stable of big span on it, more by elastic reset spare 33 being sheathed on 26 of limit body 34 and stopper bodies, can effectively shorten the length that goes up cut-off knife seat 32 integral body, so that more simplifying, whole structure reduces the number of, and because last cut-off knife seat 32 is short and small, so the possibility of rocking when last cut-off knife seat 32 is adjusted reduces relatively, can effectively improve the stability of action.

3. transmission is rationally certain: promptly cut-off knife seat 32 cooperates upward cut-off knife transmission device 20

stopper bodies

26 and 11 formed parallel four connection rod set of support with last cut-off knife 31 on it, it is upper and lower mobile that cut-off knife 31 can remain on parallel state on it, so go up the cutting on cloth angle and the angle that can keep the best cooperating of following cut-off knife 41 of cut-off knife 31, and can effectively improve the transmission effect of strength by the interlock of each parallel member, can effectively improve the effect person of start drag, cut the certain purpose of cloth angle and reach transmission.

4. the following cut-off knife 41 of high force resistance combines pedestal 42 designs with following cut-off knife: promptly its following cut-off knife is fixed on the following cut-off knife seat 43 except that the stage casing in conjunction with pedestal 42, and be sheathed on the second parallel pivot 112 in the bottom, to form the drag structural form of long moment, so when last cut-off knife 31 and following cut-off knife 41 are interlaced when cutting cloth, it can remain under the stable status and carry out Qie Bu, and can reach the high-quality demand of cloth of cutting.

5. the high infringement property of structural stability is little: owing to last cut-off knife 31, go up cut-off knife seat 32 and when cut-off knife 41 combines structure such as pedestal 42 and moves mutually with following cut-off knife down, it is relative rock or partially emotionally shape minimize, stability is high, and the motion frequency of Sewing machines 10 height very, when stability is high, the smoothness of moving between its member increases naturally, and the probability that vibration and mutual improper frictional impact destroy is reduced to minimum state, and effectively prolonged whole service life.

In sum, the present invention can reach above-mentioned all function really, so the present invention should accord with the patent application important document, files an application in accordance with the law.

Claims

1. Sewing machines cut-off knife device, wherein, the cut-off knife mechanism of Sewing machines denim cuttings, it is with power transmission shaft, cut-off knife transmission device cut-off knife in the start of cut-off knife mechanism in the cooperation; And cut-off knife mechanism is provided with the last cut-off knife stopping means and the following cut-off knife stopping means of interlock and fixing upper and lower cut-off knife in addition; It is characterized in that:

2. Sewing machines cut-off knife device as claimed in claim 1, it is characterized in that, the stopper body pivot perforation of cut-off knife transmission device on is passed in last cut-off knife seat end, and be placed through supported hole on the bracing frame in the end of last cut-off knife seat, and the last cut-off knife seat between bracing frame and stopper body is provided with elastic reset spare and limit body, relative spacing hole and the limit shaft of being provided with bracing frame of its limit body.

3. Sewing machines cut-off knife device as claimed in claim 1, it is characterized in that, last cut-off knife transmission device is provided with the driving link of cam interlock form in the support final drive shaft, a driving link and an electronic-controlled power steering part articulate and drive, this electronic-controlled power steering part is hubbed at support, and establish connecting rod in other termination, connecting rod is end and another electronic-controlled power steering part interlock in addition, the electronic-controlled power steering part is hubbed on the parallel pivot, end is articulated in stopper body bottom in addition, and the stopper body cooperates an attached moving part and electronic-controlled power steering part and support to form the structural form of parallel four connection rod set.

4. Sewing machines cut-off knife device as claimed in claim 1 is characterized in that:

The following cut-off knife of following cut-off knife stopping means is fixed in down cut-off knife in conjunction with pedestal, and its down cut-off knife combine with following cut-off knife seat on the support in conjunction with pedestal, following cut-off knife then is placed on parallel drive-connecting shaft on the support in conjunction with pedestal.