CN1091184C - Needle-stick linkage transmission mechanism of sewing machine - Google Patents
Needle-stick linkage transmission mechanism of sewing machine Download PDFInfo
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- CN1091184C CN1091184C CN97112742A CN97112742A CN1091184C CN 1091184 C CN1091184 C CN 1091184C CN 97112742 A CN97112742 A CN 97112742A CN 97112742 A CN97112742 A CN 97112742A CN 1091184 C CN1091184 C CN 1091184C
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- needle
- bar
- swing connecting
- connecting bar
- sewing machine
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Abstract
The present invention relates to a connecting rod transmission device for a needle rod of a sewing machine, which mainly comprises a swinging connecting rod, the needle rod, a guide pin, a guide sheet, etc., wherein the up-down reciprocating swing of the swinging connecting rod is converted into the up-down linear reciprocating motion of the needle rod through the rotational slide between a guidance hole on the needle rod and the guide pin, and the rectilinear translation slide between a chute on the swinging connecting rod and a sliding part on the guide pin, so a sewing operation is carried out. In addition, a guiding rail on the needle rod and the guide sheet fixed on a casing on an arm of the sewing machine form up-down sliding engagement, so the up-down linear reciprocating motion of the needle rod can be ensured.
Description
The present invention relates to a kind of needle-stick linkage transmission mechanism of sewing machine.
Needle-stick linkage transmission mechanism of sewing machine system is converted to the conversion driving mechanism that pumps along the orthoscopic of needle bar with the reciprocating of the arching trajectory of swing connecting bar, in order to drive needle bar and to drive suture needle to carry out the sewing operation.
General Sewing machines or copy gram car (overlock machine) for answering the market demand, must be able to adapt to high speed sewing thick, grenadine, but cloth that sewing is thick and hard such as denim (jeans) and #12 be so that quite serious for the wearing and tearing of mechanisms such as Sewing machines needle bar connecting rod during the cloth of #16 pound, and be easy to generate noise.
Japanese Utility Model patent 10788-1993 has disclosed a kind of sewing machine needle bar drive unit, and as shown in Figure 7, it is made up of shank 103, swing arm 102 and connecting pin 104 threes, and wherein, shank 103 tops are provided with a U font guidance member 130; Swing arm 102 front ends are provided with a pair of forked carriage 121 that is, and carriage 121 front ends then form through hole 122; The interlude of connecting pin 104 forms upper and lower each recessed tabular surface 141.By connecting pin 104 being passed through hole 122 and guidance member 130 being embedded in tabular surface 141, the arching trajectory reciprocally swinging of swing arm 102 just changes pumping of shank 103 into, wherein, the variation of angle system is rotated in through hole 122 and is offseted by connecting pin 104, and the lateral displacement variation between the straight path of the arching trajectory of swing arm 102 and shank 103 is then reciprocatingly slided in guidance member 130 by the tabular surface 141 of connecting pin 104 and offseted.In this kind constituted mode,, therefore often be damaged and wear away because tabular surface 141 parts of connecting pin 104 are that shear stress and twisting stress have been born in the concentrated area, and constantly slide in the guidance member 130; In addition, for the swing arm 102, shank 103 and the connecting pin 104 that are linked in mutually together can accurately be operated, the requirement on machining accuracy of part such as through hole 122, guidance member 130 and tabular surface 141 is very high, thereby has increased the difficulty aspect manufacturing, M R.
The Taiwan patent of invention is announced No. 280841 and has been disclosed a kind of sewing machine needle bar drive unit, as shown in Figure 8, it is made up of swing arm 202, shank 203 and pilot pin 204 threes, and wherein, swing arm 202 front ends are provided with the connecting rod 221 of an elongated cylindrical; Shank 203 tops are provided with a pair of forked carriage 230 that is, and then are formed with in the middle of each carriage 230 and clasp hole 231; The pars intermedia of pilot pin 204 is formed with a guide hole 241 through wherein.Clasp hole 231 and connecting rod 221 is penetrated in the guide hole 241 by pilot pin 204 is passed, the arching trajectory reciprocally swinging of swing arm 202 changes pumping of shank 203 into, wherein, angle changes system to be rotated in clasping hole 231 and is offseted by pilot pin 204, and the lateral displacement variation between the straight path of the arching trajectory of swing arm 202 and shank 203 is then reciprocatingly slided in guide hole 241 by connecting rod 221 and offseted.In this kind constituted mode,, therefore cause the crooked or fracture of connecting rod 221 easily because connecting rod 221 parts are that the concentrated area affords shear stress, and constantly slide in the guide hole 241; In addition, the higher difficulty that has relatively increased manufacturing, M R aspect of the requirement on machining accuracy of connecting rod 221 and guide hole 241.
Purpose of the present invention is for providing a kind of needle-stick linkage transmission mechanism of sewing machine, and its structure be simply than prior art, can be easily and satisfy the demand of accurate sewing effectively.
Another object of the present invention is for providing a kind of needle-stick linkage transmission mechanism of sewing machine, and it can reduce the power consume and improve transmission efficiency.
Another purpose of the present invention is for providing a kind of needle-stick linkage transmission mechanism of sewing machine, and the abrasion situation of its spare part can minimize, and can reduce fault and noise.
Technical program of the present invention lies in providing a kind of needle-stick linkage transmission mechanism of sewing machine, it is to be set in the arm casing of Sewing machines, and be fulcrum and swing up and down reciprocatingly with one in Sewing machines arm casing supporting balance staff by the rotating drive power of machine spindle, pump as linear pattern in order to the suture needle that drives needle bar and connected, it is characterized in that, include:
One swing connecting bar, the one end is formed a dead eye, uses described swing connecting bar is sheathed on described supporting balance staff in the sewing arm casing; Its other end is formed a bracket part, and it is made up of two carriage branches that parallel with described swing connecting bar, has been formed a chute in each described carriage branch;
One needle bar, its upper end is formed a guidance hole and a guide rail, and its lower end then is connected with the suture needle of Sewing machines;
One pilot pin, its two ends respectively are formed a smooth sliding part, the mid portion of described pilot pin system is sheathed in the described guidance hole of described needle bar upper end, and is set at slidably with described two sliding parts in described two chutes of described swing connecting bar and makes described needle bar be connected to described swing connecting bar; And
One guide card, it is to be fixed on the Sewing machines arm casing, but and form engaging of slide down dynamic formula with the described guide rail of described needle bar upper end;
Wherein, described swing connecting bar is driven and is up and down reciprocatingly swung by described supporting balance staff, rectilinear translation slip between described two sliding parts of the described guidance hole of described needle bar upper end and described two chutes of rotational slide between described pilot pin and described swing connecting bar and described pilot pin then pumps the linear pattern that changes described needle bar into of up and down reciprocatingly swinging of described swing connecting bar, uses and carries out sewing; And
The described guide rail of described needle bar and the linear pattern between described guide card slide up and down can guarantee that described needle bar carries out linear pattern and pumps.
By above technical scheme as can be known, the present invention is owing to change into the sliding tray pattern with the coupling part of the swing connecting bar front end of needle bar transmission device, can make needle bar remained by force direction consistent with its direction of motion.In addition, owing on the needle bar motion path, add guiding device, can guarantee that the needle bar motion path keeps required linear pattern, and can offset suture needle and insert the resistance that the moment of cloth bears, use and eliminate the damage of resistance produced thus moment, and avoid producing noise because of abrasion to the casing lining.
Specify preferred embodiment of the present invention below in conjunction with accompanying drawing.
The accompanying drawing simple declaration
Fig. 1 is the stereogram of expression needle-stick linkage transmission mechanism of sewing machine of the present invention relevant position in Sewing machines;
Fig. 2 is the front schematic view of expression needle-stick linkage transmission mechanism of sewing machine of the present invention and associated drives mechanism annexation;
Fig. 3 is the stereogram of needle-stick linkage transmission mechanism of sewing machine of the present invention;
Fig. 4 is the three-dimensional exploded view of needle-stick linkage transmission mechanism of sewing machine of the present invention;
Fig. 5 is the schematic top plan view of needle-stick linkage transmission mechanism of sewing machine of the present invention;
Fig. 6 A is the side schematic view of expression needle-stick linkage transmission mechanism of sewing machine motion state of the present invention, and wherein, needle bar system is positioned at peak;
Fig. 6 B is the another side schematic diagram of expression needle-stick linkage transmission mechanism of sewing machine motion state of the present invention, and wherein, needle bar system is positioned at intermediate point;
Fig. 6 C is the another side schematic view of expression needle-stick linkage transmission mechanism of sewing machine motion state of the present invention, and wherein, needle bar system is positioned at minimum point;
Fig. 7 is the three-dimensional exploded view of a prior art;
Fig. 8 is the three-dimensional exploded view of another prior art; And
Fig. 9 is the side schematic view of motion state when needle bar is positioned at intermediate point in the expression prior art.
As illustrated in fig. 1 and 2, needle-stick linkage transmission mechanism of sewing machine 1 of the present invention is to be set in Sewing machines 10 arms 12.By the rotating drive power of machine spindle 14 and by a series of crank and/or cam conversion, making this needle bar link gearing 1 is fulcrum and swing up and down reciprocatingly with a supporting balance staff 16, uses the suture needle that drives needle bar 3 and connected 13 and pumps as linear pattern.
Shown in Fig. 3 and 4, consist predominantly of a swing connecting bar 2, a needle bar 3, a pilot pin 4 and a guide card 5 according to needle-stick linkage transmission mechanism of sewing machine 1 of the present invention.One end of swing connecting bar 2 is formed a dead eye 22, uses swing connecting bar 2 is sheathed and be fixed on the supporting balance staff 16, makes the driving of swing connecting bar 2 supported balance staffs 16 and up and down reciprocatingly swings.The other end of swing connecting bar 2 is formed the bracket part 24 of a fork-shaped, and it is made up of two carriage branches 25 that parallel with swing connecting bar, is formed one in each carriage branch 25 and is parallel chute 26 with swing connecting bar 2.
The upper end of needle bar 3 is formed a guidance hole 32 and a guide rail 34, and guide rail 34 is the L font and is connected in the place ahead in guidance hole 32: needle bar 3 is to be sheathed in the lining 18 that is set on Sewing machines arm 12 casings, uses to extend to be piercing in outside the casing; The lower end of needle bar 3 is connected with the suture needle 13 of Sewing machines.
The two ends of pilot pin 4 respectively are formed with a smooth sliding part 42, and two is tabular surface about it, and its longitudinal thickness equals vertical width of the chute 26 of swing connecting bar 2; The mid portion of pilot pin 4 is sheathed in the guidance hole 32 of needle bar 3 upper ends, and is set at slidably with its sliding part 42 in the chute 26 of swing connecting bar 2; By this, swing connecting bar 2, needle bar 3 and pilot pin 4 just are connected to each other and braking mutually.
In addition, guide card 5 is fixed in the casing inside of Sewing machines arm 12, and it is to be the L font, and is interlocked with the guide rail 34 of needle bar 3 upper ends, but forms the joint (with reference to figure 5) of slide down dynamic formula.
With reference to figure 6A, 6B and 6C, swing connecting bar 2 is driven and is up and down reciprocatingly swung by supporting balance staff 16, at this moment, between the guidance hole 32 of needle bar 3 upper ends and the pilot pin 4 is to be rotated slip, and be to carry out rectilinear translation to slide between two sliding parts 42 of two chutes 26 of swing connecting bar 2 and pilot pin 5, this kind continuous action relation by 4 of swing connecting bar 2, needle bar 3 and pilot pins, swing connecting bar 2 supported balance staffs 16 drive and the oscillating motion up and down reciprocatingly carried out can change the linear pattern of needle bar 3 into pumps, to carry out the sewing to cloth M.In addition, because but the guide rail 34 of guide card 5 and needle bar 3 upper ends is the joint that is the slide down dynamic formula, can guarantee more that needle bar 3 keeps linear pattern and pump, and has the effect that resistance pushes away, to eliminate the lateral thrust of 2 pairs of needle bars 3 of swing connecting bar in motion process, reduce the abrading machine meeting of 18 of needle bar 3 and linings.
And for example shown in Fig. 6 B and 9, the present invention compares with the needle bar link gearing of prior art, and when swing connecting bar 2 and needle bar 3 move to (when needle bar 3 is positioned at intermediate point) when being vertical each other, in the present invention, swing connecting bar 2 is applied to the thrust P of needle bar 3
1System concentrates on (Fig. 6 B) on its axial line, can't produce moment to cause needle bar 3 crooked and cause the wearing and tearing and the noise of 18 of needle bar 3 and linings; And in the prior art, swing connecting bar 2 is applied to the thrust P of needle bar 3
2Then be offset from its axial line one segment distance e (Fig. 9), thereby produce moment and cause the crooked and wearing and tearing of needle bar 3 and produce noise.
The present invention is not limited to the foregoing description, and any modification and variation of doing according to spirit of the present invention and claims must belong to category of the present invention.
Claims (5)
1. needle-stick linkage transmission mechanism of sewing machine, it is to be set in the arm casing of Sewing machines, and be fulcrum and swing up and down reciprocatingly pumps as linear pattern in order to the suture needle that drives needle bar and connected with one in Sewing machines arm casing supporting balance staff by the rotating drive power of machine spindle; Described transmission device comprises a swing connecting bar, a needle bar, and a pilot pin and a guide card is characterized in that,
Described swing connecting bar one end is formed a dead eye, uses described swing connecting bar is sheathed on described supporting balance staff in the sewing arm casing; Its other end is formed a bracket part, and it is made up of two carriage branches that parallel with described swing connecting bar, has been formed a chute in each described carriage branch;
Described needle bar upper end is formed a guidance hole and a guide rail, and its lower end then is connected with the suture needle of Sewing machines;
Described pilot pin two ends respectively are formed a smooth sliding part, the mid portion of described pilot pin system is sheathed in the described guidance hole of described needle bar upper end, and is set at slidably with described two sliding parts in described two chutes of described swing connecting bar and makes described needle bar be connected to described swing connecting bar; And
Described guide card is fixed on the Sewing machines arm casing, but and forms engaging of slide down dynamic formula with the described guide rail of described needle bar upper end.
2. needle-stick linkage transmission mechanism of sewing machine as claimed in claim 1 is characterized in that, the described chute of described swing connecting bar is to be parallel with this swing connecting bar.
3. needle-stick linkage transmission mechanism of sewing machine as claimed in claim 1 is characterized in that, the described sliding part of each of described pilot pin up and down two be tabular surface, and the longitudinal thickness of described sliding part equals vertical width of the described chute of described swing connecting bar.
4. needle-stick linkage transmission mechanism of sewing machine as claimed in claim 1 is characterized in that, described needle bar is to be sheathed in the lining that is set on the Sewing machines arm casing, uses to extend being piercing in outside the Sewing machines arm casing.
5. needle-stick linkage transmission mechanism of sewing machine as claimed in claim 1 is characterized in that, the described guide rail of described needle bar and described guide card system are the L font.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112742A CN1091184C (en) | 1997-06-13 | 1997-06-13 | Needle-stick linkage transmission mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112742A CN1091184C (en) | 1997-06-13 | 1997-06-13 | Needle-stick linkage transmission mechanism of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1202545A CN1202545A (en) | 1998-12-23 |
| CN1091184C true CN1091184C (en) | 2002-09-18 |
Family
ID=5172460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97112742A Expired - Fee Related CN1091184C (en) | 1997-06-13 | 1997-06-13 | Needle-stick linkage transmission mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1091184C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4450947B2 (en) * | 2000-05-10 | 2010-04-14 | Ｊｕｋｉ株式会社 | Sewing machine needle swing device |
| CN101649530B (en) * | 2009-09-18 | 2012-12-05 | 浙江青本缝纫机有限公司 | Transmission mechanism for needle bar of straight-type flat seaming machine |
| CN102409472A (en) * | 2011-09-13 | 2012-04-11 | 吴江市晓昱喷气织造有限公司 | Mangling connecting rod |
| CN102864592A (en) * | 2012-08-27 | 2013-01-09 | 吴江市中盛机械有限公司 | Differential shaft crank for industrial sewing machine |
| JP2019170707A (en) * | 2018-03-28 | 2019-10-10 | ペガサスミシン製造株式会社 | Needle bar drive mechanism for sewing machine |
| CN108642738A (en) * | 2018-05-09 | 2018-10-12 | 江西服装学院 | A kind of clothes sewing process device for scalding viscous radium-shine digit printing |
| CN112877928B (en) * | 2021-01-28 | 2023-02-17 | 星锐缝纫机(嘉兴)有限公司 | Sewing machine structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19612564C1 (en) * | 1996-03-29 | 1997-02-20 | Duerkopp Adler Ag | Sewing machine |
-
1997
- 1997-06-13 CN CN97112742A patent/CN1091184C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19612564C1 (en) * | 1996-03-29 | 1997-02-20 | Duerkopp Adler Ag | Sewing machine |
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| Publication number | Publication date |
|---|---|
| CN1202545A (en) | 1998-12-23 |
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