CN101709537B - Line cutting structure for sewing machines - Google Patents
Line cutting structure for sewing machines Download PDFInfo
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- CN101709537B CN101709537B CN2009102187793A CN200910218779A CN101709537B CN 101709537 B CN101709537 B CN 101709537B CN 2009102187793 A CN2009102187793 A CN 2009102187793A CN 200910218779 A CN200910218779 A CN 200910218779A CN 101709537 B CN101709537 B CN 101709537B
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- electromagnet
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- drive rod
- tangent line
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Abstract
The invention relates to a line cutting structure for sewing machines. The prior line cutting structure has the defects of complex mechanism, high difficulty in installation and adjustment, high cost and complex resetting assembly, thereby having loud operation noise. In the line cutting structure for sewing machines provided in the invention, an electromagnet in an electromagnet assembly is perpendicularly fixed to a mounting rack, and the movement end is positioned on the lower part; the driving end of a drive rod in the cam movement assembly is hinged with the movement end of the line cutting electromagnet through a spherical joint pin, the driven end is connected with the sphere on one end of a cutting connecting rod in the cutter assembly through a spherical long pin, and the other end of the cutter connecting rod is connected with the sphere of a spherical short pin; a line cutting roller is arranged on the driving end of the drive rod, and the line cutting cam is fixed to the lower shaft; and the spring of the resetting assembly is arranged between the mounting rack and the driving end of the drive rod in the electromagnet assembly. The invention adjusts the movement direction of the original electromagnet assembly according to the movement principle, thereby having the advantages of simple structure, and stable and reliable movement.
Description
Technical field
The present invention relates to the Sewing machines equipment technical field, specifically refer to a kind of line cutting structure for sewing machines.
Background technology
Existing line cutting structure for sewing machines is made up of electromagnet assembly, tangent line assembly, cam action assembly and reset assembly usually, and said electromagnet assembly is made up of the electromagnet and the installing rack of horizontal motion; Said cam action assembly comprises the drive rod of vertical direction setting, the tangential cam and the cam crank assemblies of dish type, and tangential cam is arranged on the lower shaft, and the cam crank assemblies is provided with the tangent line roller; Said tangent line assembly comprises slitter shaft, cutter connecting rod, cutter driving crank and cutoff knife rack, and cutter connecting rod is connected through short pin with cutoff knife rack, and the cam crank assemblies is arranged on the slitter shaft; Also be provided with reset assembly on the said slitter shaft.During work; Tangent line electromagnet horizontal balance; Tangent line roller and the tangential cam engagement of bogie on movement in vertical direction actuating cam crank assemblies drives the driving cam crank assemblies and rotates, and drives slitter shaft then and rotates; Slitter shaft drives the cutter driving crank in the tangent line assembly, and the cutter driving crank drives the cutter connecting rod rectilinear motion again and accomplishes thread cutting action.After accomplishing tangent line, behind the given tangent line electromagnet release signal, the cam crank assemblies resets it through resetting means, and the tangent line assembly is returned to original position simultaneously.
Can find out that existing structure mechanism is complicated, the install adjustment difficulty is big, and cost is higher, simultaneously because of the complicated reset assembly of needs, therefore produces bigger noise in the operation, influences environment.
Summary of the invention
The present invention will provide a kind of line cutting structure for sewing machines, to overcome the problem that mechanism is complicated, the install adjustment difficulty is big, cost is higher and noise is big that prior art exists.
For overcoming the problem that prior art exists; Technical scheme of the present invention is: a kind of line cutting structure for sewing machines; Comprise lower shaft, electromagnet assembly, cam action assembly, tangent line assembly and reset assembly, electromagnet assembly is made up of the electromagnet that installing rack and vertical fixing are connected on the installing rack, and said tangent line assembly comprises cutter connecting rod and the cutoff knife rack that connects through short pin; Said cam action assembly comprises tangential cam, drive rod and tangent line roller, and its special character is:
The electromagnet vertical fixing is connected on the installing rack in the electromagnet assembly, and its motion end is positioned at the bottom; Drive rod in the cam action assembly is horizontally disposed with; The drive end of drive rod is hinged through the motion end of spherical connecting pin and tangent line electromagnet; Its driven end through sphere have strong market potential with cutter assembly in an end sphere of cutter connecting rod be connected, the other end of cutter connecting rod is connected with spherical short pin sphere; The tangent line roller is arranged on the drive end of drive rod, and tangential cam is a cylindrical cam mechanism, and tangential cam is fixedly set on the lower shaft, and the movement locus of tangent line roller matches with tangential cam; Reset assembly comprises spring, and spring is arranged between the drive end of installing rack and drive rod in the electromagnet assembly.
Above-mentioned line cutting structure for sewing machines also comprises thread releasing mechanism, and above-mentioned thread releasing mechanism comprises the loose ends steel cable on the drive end that is fixed in drive rod.
Above-mentioned loose ends steel cable can be fixed on the drive rod by the steel cable pressing plate.
Compared with prior art, the present invention adjusts the direction of action of original electromagnet assembly from operating principle, and the action of cutter connecting rod simultaneously changes movement in a curve into by rectilinear motion, thereby has following advantage:
1. simple in structure: reduced the cutter driving crank in the tangent line assembly, the cam action assembly directly with the tangent line assembly in cutter connecting rod is connected, reduced the transmission amount of parts, make that to move completion more reliable; Be main structure with the cylindrical cam mechanism in the cam action assembly, compare with original structure, reduced complicated cam crank assemblies, it is more convenient that adjustment is installed; The simplification of resetting-mechanism is more outstanding, has substituted complicated mechanism with spring, moves more reliable.
2. thread cutting action is stable more, reliable: tangential cam is designed to cylindrical cam mechanism; When roller and tangential cam 5 engagements (the tangent line roller gets in the cam path of tangential cam 5), bigger moment of torsion can be provided, cutter connecting rod has all adopted the ball connection with being connected of two ends simultaneously; Reduced the resistance of mechanism self; Offered more sufficient strength when giving tangent line, stable, simultaneously reliable at tangent line, also improved the success rate of cutting thick line.
3. noise is little: the ball syndeton at cutter connecting rod two ends can effectively reduce vibrations and reduce noise, and the resetting means of tangent mechanism is very simple simultaneously, and resetting only needs a spring to accomplish, and the sound also greatly reduces.
4. cost is low: cost reduces about 20%.
Description of drawings
Fig. 1 is the sketch map of original structure;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is that the B of Fig. 3 is to view;
Fig. 5 is that the C of Fig. 3 is to view.
Description of reference numerals is following:
The 1-installing rack, 2-spring catch, 3-spring, 4-electromagnet, 5-tangential cam, 6-cutter connecting rod; The spherical short pin of 7-, the 8-cutoff knife rack, the 9-sphere is had strong market potential, 10-bogie, 11-steel cable pressing plate, the spherical connecting pin of 12-; 13-tangent line roller, 14-loose ends steel cable, 15-lower shaft, 16-reset assembly, 17-slitter shaft.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done detailed description.
Referring to Fig. 1 and Fig. 2.Existing Sewing machines line cutting structure is made up of electromagnet assembly, tangent line assembly, cam action assembly and reset assembly usually.
Wherein: electromagnet assembly is made up of with installing rack 1 electromagnet 4 of horizontal motion; The cam action assembly comprises the drive rod 10 of vertical direction setting, the tangential cam 5 and the cam crank assemblies of dish type, and tangential cam 5 is arranged on the lower shaft 15, and the cam crank assemblies is provided with tangent line roller 13; Line component comprises slitter shaft 17, cutter connecting rod 6, cutter driving crank and the knife rest 8 of being sure to, and cutter connecting rod 6 is connected through short pin with cutoff knife rack 8, and the cam crank assemblies is arranged on the slitter shaft 17, simultaneously, also is provided with reset assembly 16 on the slitter shaft 17.
Referring to Fig. 3～Fig. 5.A kind of line cutting structure for sewing machines provided by the invention comprises lower shaft 15, electromagnet assembly, cam action assembly, tangent line assembly, reset assembly and thread releasing mechanism.
Wherein: electromagnet assembly is made up of the electromagnet 4 that installing rack 1 and vertical fixing are connected on the installing rack 1, and electromagnet 4 vertical fixing are connected on the installing rack 1 in the electromagnet assembly, and its motion end is positioned at the bottom; The tangent line assembly comprises the cutter connecting rod 6 and cutoff knife rack 8 that connects through short pin 7; The cam action assembly comprises tangential cam 5, tangent line roller 13 and drive rod 10; Drive rod 10 is horizontally disposed with; Its drive end is hinged with the motion end of tangent line electromagnet 4 through spherical connecting pin 12; Its driven end through sphere have strong market potential 9 with cutter assembly in an end sphere of cutter connecting rod 6 be connected, the other end of cutter connecting rod 6 is connected with spherical short pin 11 spheres; Said tangent line roller 13 is arranged on the drive end of drive rod 10, and tangential cam 5 is a cylindrical cam mechanism, and tangential cam 5 is fixedly set on the lower shaft 15, and the movement locus of tangent line roller 13 matches with tangential cam 5; Reset assembly comprises spring 3, and spring 3 is arranged between the drive end of installing rack 1 and drive rod 10 in the electromagnet assembly; Thread releasing mechanism comprises the loose ends steel cable 14 on the drive end that is fixed in drive rod 10, and loose ends steel cable 14 can be fixed on the drive rod 10 by steel cable pressing plate 11.
When the present invention worked: lower shaft 15 rotations, tangential cam 5 was followed rotation.When the needs tangent line; Behind the given ferromagnetic signal of system, be fixed on electromagnet 4 adhesives on the installing rack 1, drive drive rod 10 swings; Drive rod 10 drives tangent line roller 13 and moves in the tangential cam 5; Tangent line roller 13 is followed tangential cam 5 motion and action is passed to drive rod 10, and drive rod 10 is had strong market potential through sphere and 9 driven cutter connecting rods 6 and swing, and cutter connecting rod 6 drives cutoff knife racks 8 through the short pin 7 of sphere again and carries out rotatablely moving around lower shaft 15.In the time of electromagnet 4 adhesives, extension spring 3 during the action of the drive end of drive rod 10;
After treating that cutoff knife rack 8 drives cutting knife completion thread cutting action; Tangent line electromagnet 4 discharges; This moment, tangent line roller 13 withdrawed from by returning in the tangential cam 5, and the spring 3 that stretched passes to cutter connecting rod 6 and cutoff knife rack 8 immediately because elastic force drives drive rod 10 counterclockwise backswing; Make it return, accomplished thread cutting action one time;
When tangent line, to cooperate tangent line given loose ends on opportunity, when drive rod 10 counter-clockwise swings, drive 14 actions of loose ends steel cable, realize the loose ends function.
Claims (3)
1. line cutting structure for sewing machines; Comprise lower shaft, electromagnet assembly, cam action assembly, tangent line assembly and reset assembly; Electromagnet assembly is made up of the electromagnet (4) that installing rack (1) and vertical fixing are connected on the installing rack (1); Said tangent line assembly comprises cutter connecting rod (6) and the cutoff knife rack (8) that connects through short pin, and said cam action assembly comprises tangential cam (5), drive rod and tangent line roller (13), it is characterized in that:
Electromagnet in the described electromagnet assembly (4) vertical fixing is connected on the installing rack (1), and its motion end is positioned at the bottom;
Drive rod in the described cam action assembly is horizontally disposed with; The drive end of drive rod is hinged through the motion end of spherical connecting pin and electromagnet (4); Its driven end is connected through have strong market potential an end sphere of the cutter connecting rod (6) in (9) and the cutter assembly of sphere, and the other end of cutter connecting rod (6) is connected with spherical short pin (7) sphere;
Described tangent line roller (13) is arranged on the drive end of drive rod, and tangential cam (5) is a cylindrical cam mechanism, and tangential cam (5) is fixedly set on the lower shaft, and the movement locus of tangent line roller (13) matches with tangential cam (5);
Described reset assembly comprises spring (3), and spring (3) is arranged between the drive end of installing rack in the electromagnet assembly (1) and drive rod.
2. a kind of line cutting structure for sewing machines according to claim 1 is characterized in that: comprise that also thread releasing mechanism, thread releasing mechanism comprise the loose ends steel cable (14) on the drive end that is fixed in drive rod.
3. a kind of line cutting structure for sewing machines according to claim 2 is characterized in that: described loose ends steel cable (14) is fixed on the drive rod by steel cable pressing plate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102187793A CN101709537B (en) | 2009-11-03 | 2009-11-03 | Line cutting structure for sewing machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102187793A CN101709537B (en) | 2009-11-03 | 2009-11-03 | Line cutting structure for sewing machines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101709537A CN101709537A (en) | 2010-05-19 |
| CN101709537B true CN101709537B (en) | 2012-07-25 |
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ID=42402343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102187793A Active CN101709537B (en) | 2009-11-03 | 2009-11-03 | Line cutting structure for sewing machines |
Country Status (1)
| Country | Link |
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| CN (1) | CN101709537B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041646B (en) * | 2010-12-24 | 2012-10-24 | 苏州爱可迈数控机电有限公司 | Trimming device of sewing machine |
| CN102877230A (en) * | 2012-06-19 | 2013-01-16 | 新杰克缝纫机股份有限公司 | Automatic cutting device of sewing machine |
| CN104775241B (en) * | 2015-04-28 | 2017-05-17 | 杰克缝纫机股份有限公司 | Thread trimming mechanism for sewing machine |
| CN106283426B (en) * | 2016-08-30 | 2019-04-12 | 杰克缝纫机股份有限公司 | A kind of sewing machine transmission mechanism and cutting facility |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2155381Y (en) * | 1991-07-27 | 1994-02-09 | 刘晓刚 | Thread cutter device of overedging machine controlled by electromagnetic mechanism |
| CN1268594A (en) * | 1999-03-24 | 2000-10-04 | 重机公司 | Device for cutting lower thread of sewing machine |
| CN201241259Y (en) * | 2008-07-17 | 2009-05-20 | 张章生 | Lift and presser foot and tangent line transmission mechanism of sewing machine |
| CN201546031U (en) * | 2009-11-03 | 2010-08-11 | 西安标准工业股份有限公司 | Tangent structure for sewing machine |
-
2009
- 2009-11-03 CN CN2009102187793A patent/CN101709537B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2155381Y (en) * | 1991-07-27 | 1994-02-09 | 刘晓刚 | Thread cutter device of overedging machine controlled by electromagnetic mechanism |
| CN1268594A (en) * | 1999-03-24 | 2000-10-04 | 重机公司 | Device for cutting lower thread of sewing machine |
| CN201241259Y (en) * | 2008-07-17 | 2009-05-20 | 张章生 | Lift and presser foot and tangent line transmission mechanism of sewing machine |
| CN201546031U (en) * | 2009-11-03 | 2010-08-11 | 西安标准工业股份有限公司 | Tangent structure for sewing machine |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2000-317178A 2000.11.21 |
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| Publication number | Publication date |
|---|---|
| CN101709537A (en) | 2010-05-19 |
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