CN104233652B

CN104233652B - Sewing machine head

Info

Publication number: CN104233652B
Application number: CN201410424242.3A
Authority: CN
Inventors: 宋源普; 倪益华; 倪忠进
Original assignee: Zhejiang A&F University ZAFU
Current assignee: Zhejiang A&F University ZAFU
Priority date: 2014-08-26
Filing date: 2014-08-26
Publication date: 2016-08-24
Anticipated expiration: 2034-08-26
Also published as: CN104233652A

Abstract

A kind of sewing machine head, including cam box (1), sewing needlecase (7), crochet hook case (18), motor and frame, actuated by cams motor projecting shaft is connected with cam (2) axle, cam the most successively with A connecting rod (3), slide block (4) and upper push-pull bar (5) connect, this cam the most successively with rocking bar (28), B connecting rod (27), slide block (26) and lower push-pull bar (25) connect, upper and lower two push-pull bars (5, 25) in upper and lower two cantilevers (6) through sewing needlecase (7) respectively and crochet hook case (18), finally it is connected with folder shank (13) and the crochet hook (17) of fixing sewing needle (14) respectively, slide plate (24) is arranged at cam box bottom, guide rail and driving motor (30) of retreating.This sewing machine head be especially applicable to on reeling frame silk sheet beam splitting bundle and to gunnysack, woven bag, the stitching of cotton bag, have that mechanical organ is few, unit price is low, connected mode is simple, wear-out part is few, length in service life, assembling and the advantage such as easy to maintenance.

Description

Sewing machine head

Technical field

The present invention relates to point transmission dress of the sewing machine head of a kind of sewing machine, especially power Put and rely primarily on connecting rod and the sewing machine head of right angle connecting rod realization.

Background technology

At present, the actuating unit in head of sewing machine relies primarily on cam gear in fact Existing, structure is the most numerous and diverse, and cost of manufacture is high, assembling and maintenance difficult, as CN101395317 discloses one " single-thread locked handstitches forming method and seam Thread machine ", have bottom and top feed cam, horizontal feed cam, syringe drive triangular cam and Feeding conversion triangular cam, has also needed many elements such as crank, gear to coordinate, and structure is huge Miscellaneous, element is many, each element connects in length and breadth, and actuating mechanism is many, and abrasion is big, spoilage high, Service life is short, and maintenance rate is high, and assembling and maintenance difficulty are big.

Summary of the invention

The technical problem to be solved in the present invention is to provide one, and mechanical organ is few, structure is simple The sewing machine head single, production cost is low.

Solve above-mentioned technical problem and be the technical scheme is that this sewing machine head, including Cam box, sewing needlecase, crochet hook case, motor and frame, the actuated by cams outside cam box Motor projecting shaft is connected with camshaft, cam the most successively with A connecting rod, slide block And upper push-pull bar connects one by one, this cam has fulcrum the most successively and draws with centre The rocking bar of spring, B connecting rod, slide block and lower push-pull bar connect one by one, upper and lower two push-pull bars Through upper and lower two cantilevers through sewing needlecase respectively with in crochet hook case, now go up push-pull bar by Fixed block location and successively with C connecting rod, right angle connecting rod, D connecting rod until with press from both sides shank Connecting one by one, folder shank is positioned by fixed block, and there is sewing needle folder shank lower end；Crochet hook case Interior lower push-pull bar is positioned by fixed block and is connected with E connecting rod and crochet hook, crochet hook locating piece Location crochet hook, has mounting plate and bottom plate between sewing needlecase and crochet hook case；Under cam box Portion has the slide plate, guide rail and the advance and retreat that make head retreat to drive motor, mounting plate and bottom plate Between have the crack of object to be sewn.

Cable cutter is had by described sewing needlecase side.

Described cable cutter includes blade and coaxial mounted electromagnetic block.

The invention has the beneficial effects as follows sewing machine head medium power actuated element based on connecting rod, Element is few, simple in construction, cost of manufacture are low, and wear-out part is few, service life is long, maintenance Rate is low, and assembling, with easy to maintenance, also have and is split the raw silk silk sheet on reeling frame The Special use function of bundle (refers to " the automatic synnema of raw silk applied for a patent the most separately Machine ").

Accompanying drawing explanation

Fig. 1 is the front view of this sewing machine head.

Fig. 2 is the top view of this sewing machine head.

Detailed description of the invention

The present invention below in conjunction with embodiment and is described in further detail referring to the drawings: this sewing machine Head, including cam box 1, sewing needlecase 7, crochet hook case 18, motor and frame, cam Actuated by cams motor projecting shaft outside case is connected with cam 2 axle, and cam is the most successively Being connected with A connecting rod 3, slide block 4 and upper push-pull bar 5, this cam is the most successively With centre have the rocking bar 28 of fulcrum and spring 29, B connecting rod 27, slide block 26 and under push away Pull bar 25 connects, and upper and lower two push-pull bars 5,25 are the most straight through upper and lower two cantilevers 6 Reach in sewing needlecase 7 and crochet hook case 18, now go up push-pull bar and positioned also by fixed block 8 Successively with C connecting rod 9, right angle connecting rod 10, D connecting rod 11 until being connected with folder shank 13, Folder shank is positioned by fixed block 12, and there is sewing needle 14 folder shank lower end；In crochet hook case Lower push-pull bar 25 is positioned by fixed block 21 and is connected with E connecting rod 20 and crochet hook 17, hook Pin locating piece 19 positions crochet hook, has mounting plate between sewing needlecase 7 and crochet hook case 18 15 and bottom plate 1；Slide plate 24, guide rail 32 and making head retreat is arranged at cam box bottom Retreat and drive motor 30, between mounting plate and bottom plate, have the crack of object to be sewn.

Cable cutter is had by described sewing needlecase 7 side.

Described cable cutter includes blade 23 and coaxial mounted electromagnetic block 22.

During the work of this head, press the button starting cam and drive motor and driving motor of retreating 30 rotate, and cam 2 rotates, and drive A connecting rod 3, slide block 4, upper push-pull bar 5 respective Action, meanwhile, cam 2 also drives rocking bar 28 to swing, and then drives B connecting rod 27, slide block 26 and the respective action of lower push-pull bar 25；Upper and lower two push-pull bars are each passed through Upper lower cantalever 6 enter sewing needlecase 7 with in crochet hook case 18, upper push-pull bar successively with C Connecting rod 9, right angle connecting rod 10, D connecting rod 11 and folder shank 13 connect, at push-pull bar Under push-and-pull, sewing needle 14 is finally made to move up and down together with folder shank.Meanwhile, Lower push-pull bar 25 relies on locating piece 21 to position in crochet hook case 18, lower push-pull bar and E Connecting rod 20 is connected with crochet hook 17, and the swing of rocking bar 28, through the transmission of lower push-pull bar, makes Crochet hook swings, the acupuncture treatment up and down of sewing needle and the left and right hook line coordination one of crochet hook Cause, complete sewing task；Retreat and drive motor 30, slide plate 24 and guide rail 32, make whole Advance and retreat activity about individual head work；The thing feed mechanism to be stitched coordinated with this head will be treated The need seam face crack between upper and lower supporting plate of seam thing is passed through by rear to front.Head can be short Distance left and right retreat, feeding until seam thing by after be advanced through, therefore this head can be to quilt Seam thing carries out the sewing of vertical and horizontal.

This sewing machine head is suitable for being split the silk sheet of the raw silk being around in reeling frame especially Bundle, changes the tradition by the manual bundle of skilled worker and the way fallen behind.Can be additionally used in Gunnysack, woven bag, the stitching of cloth bag.

This sewing machine head, if loading onto photoelectric sensor by cam, loads onto initial by guide rail Stop and final limit device, load onto Hall element by feed mechanism and program, then Automatization's sewing can be realized.Because the application only requires the frame for movement of protection sewing machine head, Pardon and the most carefully state.

Because this head approximately the same plane both can longitudinal seam, also can laterally stitch, so, Cable cutter installation site, depending on situation, even can not be installed, and substitutes with hands behaviour's shears.

Cable cutter in accompanying drawing includes blade and electromagnetic block, is arranged on the left of sewing needlecase only It is a kind of citing, it is adaptable to the company after raw silk silk sheet divides on the reeling frame of length feed Line cuts off.

Claims

null1. a sewing machine head，Including cam box (1)、Sewing needlecase (7)、Crochet hook case (18)、Motor and frame，It is characterized in that the actuated by cams motor projecting shaft outside cam box is connected with cam (2) axle，Cam the most successively with A connecting rod (3)、Slide block (4) and upper push-pull bar (5) connect one by one，This cam has the rocking bar (28) of fulcrum and extension spring (29) the most successively with centre、B connecting rod (27)、Slide block (26) and lower push-pull bar (25) connect one by one，Upper and lower two push-pull bars (5、25) in upper and lower two cantilevers (6) through sewing needlecase (7) respectively and crochet hook case (18)，Now go up push-pull bar by fixed block (8) location and successively with C connecting rod (9)、Right angle connecting rod (10)、D connecting rod (11) is until being connected one by one with folder shank (13)，Folder shank is positioned by fixed block (12)，There is sewing needle (14) folder shank lower end；Lower push-pull bar (25) in crochet hook case (18) by fixed block (21) location and is connected with E connecting rod (20) and crochet hook (17), crochet hook locating piece (19) location crochet hook, has mounting plate (15) and bottom plate (16) between sewing needlecase (7) and crochet hook case (18)；The slide plate (24) making head retreat, guide rail (32) and driving motor (30) of retreating are arranged at cam box bottom, have the crack of object to be sewn between mounting plate and bottom plate.
2. sewing machine head as claimed in claim 1, is characterized in that there is cable cutter by described sewing needlecase (7) side.
3. sewing machine head as claimed in claim 2, is characterized in that described cable cutter includes blade (23) and coaxial mounted electromagnetic block (22).