CN1037018C - Five-lever thread pickup mechanism with adjustable thread feed for sewing machine - Google Patents
Five-lever thread pickup mechanism with adjustable thread feed for sewing machine Download PDFInfo
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- CN1037018C CN1037018C CN94112046A CN94112046A CN1037018C CN 1037018 C CN1037018 C CN 1037018C CN 94112046 A CN94112046 A CN 94112046A CN 94112046 A CN94112046 A CN 94112046A CN 1037018 C CN1037018 C CN 1037018C
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Abstract
The present invention provides a five-rod thread taking-up mechanism with adjustable thread feed quantities of a sewing machine, which is composed of five member hinges, such as a thread taking-up crank (I)4, a wobble crank (II), a thread taking-up connecting rod (III)9, a thread taking-up rod (IV)8 and a casing (V)1, wherein the thread taking-up crank (I)4 is installed and fixed to a main axis and rotates with the main axis; the wobble crank (II)11 is manipulated by a wobble crank controlling system, namely a crank-rocker mechanism, installed on the same main axis with the wobble crank to make the wobble crank (II)11 swing repeatedly. By converting the relative angular positions of an eccentric wheel and an eccentric wheel bracket, the heave amplitude of the thread taking-up rod can be changed, thereby achieving the goal of adjusting the thread feed quantities. The present invention can fit with 300 classes of thread hooking mechanisms with various stitches (such as an oscillating shuttle, a horizontally rotating shuttle and a horizontal type rotating shuttle).
Description
The present invention relates to make the thread take-up mechanism of 300 class chain stitch sewing machines.
The mechanism of making 300 class chain stitch sewing machines at present in the world is mainly by thorn material lead wires mechanism, string-hooking mechanism, four great institutions such as thread take-up mechanism and feed mechanism composition.The thread take-up mechanism major part all adopts crank four-bar linkage (Fig. 1) (being commonly called as the connecting rod thread take-up mechanism) in such Sewing machines.Because it is wide that Sewing machines uses, and roughly can conclude following three aspects: 1. on sewing, have thin material, in thick material, thick material, super thick material; 2. online sewing on has straight shape linear slit, curved (Z font) linear slit and various colored shape linear slit; 3. on needle gage, have that straight shape length changes, a curved wide variety and directly changing simultaneously to length and curved width.In order to adapt to above-mentioned various factors, therefore produced the Sewing machines of such various models.Four lever take-up mechanism in above-mentioned such various model Sewing machiness, its thread take-up tension lever heave amplitude is constant at setting range, promptly thread take-up tension lever is uncontrollable in setting range for the line amount.
There is a kind of AD551 type to decorate the sawtooth seam sewing machine abroad and adopts five lever take-up mechanisms (Fig. 2).This mechanism has increased a crank II on the basis of four lever take-up mechanism, add a pair of gear (gear ratio i=Z in the center that the D of the A of crank I point and crank II is ordered
1/ Z
2=2) become crank I and revolve and go around, five lever take-up mechanisms (double-crank five-rod) that crank II rotation two is changeed.This mechanical feature is the exchange by the gear relative position, reaches the heave amplitude of regulating thread take-up tension lever, and how much that promptly regulates thread take-up tension lever supplies the line amount.The relative position of change gear so repeatedly, the thread take-up tension lever that reaches various requirement is for the line amount.Reach the thread take-up tension lever that is fit to sewing condition and supply the line amount, need skilled debugging technique.
Five lever take-up mechanisms (Fig. 3 .4.5) of the confession the regulated line amount of a ZL92245091.9 use in sewing machine.This five lever take-up mechanisms of regulating for the line amount and thorn material lead wires mechanism, string-hooking mechanism and feed mechanism are formed can make 300 class stitchings, the Sewing machines of 301 and 304 particularly the most frequently used stitchings.
This Sewing machines of forming for five lever take-up mechanisms of line amount of regulating, when the Sewing machines rotating speed can run well in time below 1500 rev/mins, progressively increase to more than 1800 rev/mins the time, the cam mechanism (control wobble crank cam is paid) that the wobble crank of this mechanism connects combination just sends unusual hot-tempered sound and the accelerated wear test phenomenon occurs.Therefore the maximum speed of this structure can only use under the slow-speed of revolution situation about 1500 rev/mins.
The purpose of this invention is to provide a kind of can be under the situation of running up can regulate thread take-up tension lever for line amount, five easy lever take-up mechanisms of debugging technique.
The objective of the invention is to realize in the following manner: five lever take-up mechanisms in the confession the regulated line amount of a ZL92245091.9 use in sewing machine improve design.By thread take-up crank [I] 4, wobble crank [II] 11, line-choosing connecting rod [III] 9, thread take-up tension lever [IV] 8, five member hinges such as casing [V] 1 grade are formed.Thread take-up crank [I] 4 is mounted and fixed on the main shaft 2 (main shaft is installed on the casing A position) and rotates together; Wobble crank [II] 11 the axle be installed in another axis hole of casing [V] 1, the axle the extending area be installed in same main shaft on crank and rocker mechanism in rocking bar 14 be connected combination.When main shaft rotates, by making wobble crank (II) 11 do reciprocal rotation under the crank and rocker mechanism generation effect.(Fig. 3, Fig. 6, Fig. 7).
Crank and rocker mechanism mainly is that four members such as eccentric wheel 21, connecting rod 19, rocking bar 14, frame 1 (casing) are formed.Eccentric wheel 21 is installed on the main shaft with eccentric wheel seat 26, and eccentric wheel seat is screwed on main shaft.The garden arc groove concentric that two symmetries are arranged on the eccentric wheel seat with main shaft.Adding elastic washer 25 with two axial screws 24 went here and there garden arc groove respectively and becomes elastic stage to clamp with the end face of eccentric mounting eccentric end face.Needle bearing 20 be installed in connecting rod 19 axis holes and the axle position of eccentric wheel 21 on.If (in, in the low speed Sewing machines, can omit needle bearing).The other end of connecting rod 19 and rocking bar 14 hinges, the other end of rocking bar are installed in the axial region of wobble crank 11 and locate, clamp with screw.That regulates thread take-up tension lever needs only the button of pressing on the lower casing 31 for the line amount, and the shaft end of its button snaps in the groove of eccentric wheel 21, and wheel 35 makes angle position of eccentric wheel 21 and eccentric wheel seat 26 relative conversions in the rotation.Be that the eccentric wheel end face is provided with 2～5 locating holes, make Xiao's 29 lockings of some locating holes and eccentric wheel seat medi-spring location; Perhaps fixing with the screw in the eccentric wheel 28.
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is the track of known four lever take-up mechanism sketch and motion thereof.
Fig. 2 is known double-crank five lever take-up mechanism sketches.
Fig. 3 is ZL92245091.9 five lever take-up mechanism sketches, and the present invention together.
Fig. 4 is that ZL92245091.9 can regulate five lever take-up mechanism sketches for the line amount.
Fig. 5 is ZL92245091.9 embodiment---can regulate each parts of five lever take-up mechanisms and relative position figure for the line amount.
Fig. 6 is the five lever take-up mechanism sketches of regulating for the line amount of the present invention.
Fig. 7 is the crank and rocker mechanism kinematic sketch that the wobble crank of regulating five lever take-up mechanisms that supply the line amount of the present invention connects combination.
Fig. 8 is that the embodiment of the invention can be regulated each parts and the relative position figure for five lever take-up mechanisms of line amount.
Fig. 9 is the crank and rocker mechanism component diagram that the wobble crank of five lever take-up mechanisms of the confession the regulated line amount of the embodiment of the invention connects combination.
Figure 10 is the forward sight outline drawing of embodiments of the invention.
Used figure number and title are as follows among above-mentioned Fig. 3～Fig. 5:
Casing (V) 2. main shaft 3. front shaft sleeves, 4. thread take-up cranks (I) 5. lead 9. 10. wheel on rivet 11. wobble cranks (II) 12. axle sleeves 13. screws 14. rocking bar cranks 15. connecting rod Xiao 16. screws 17. screws 18. nuts 19. connecting rods 20. connecting rod Xiao 21. screws 22. control rocking bars 23. axles 24. opening ring washers 25. axle sleeves 26. screws 27. rollers 28. roller axle 29. screws 30. control wobble crank cams 31. axial screws 32. elastic washers 33. control wobble crank cam chairs 34. screws 35. location Xiao's 36. springs 37. buttons 38. button spring 39. cover plates 40. screws 41. of line-choosing connecting rod (III) of a screw 6. needle bar crank 7. screws, 8. thread take-up tension levers (IV).
Used figure number and title are as follows among above-mentioned Fig. 6～Figure 10:
Casing (V) 2. main shaft 3. front shaft sleeves, 4. thread take-up cranks (I) 5. lead 9. 10. wheel on rivet 11. wobble cranks (II) 12. axle sleeves, 13. screw 14. rocking bars, 15. screw 16. screws, 17. circular cone axial screws or cylinder axial screw 18. nuts 19. connecting rods 20. needle bearings 21. eccentric wheels 22. eccentric wheel cover plates 23. screws 24. axial screws 25. elastic washers 26. eccentric wheel seat 27. screws 28. screws 29. location Xiao's 30. springs 31. buttons 32. button torsion springs 33. cover plates 34. screws 35. of line-choosing connecting rod (III) of a screw 6. needle bar crank 7. screws, 8. thread take-up tension levers (IV)
The present invention improves design to the thread take-up mechanism of the multi-functional embroidery sewing machine of existing GG0801 type.This machine is a serial machine, and it can make the thin material of general straight shape linear slit, the sewing of thick material, can make the thin material embroidery of curved linear slit and the sewing such as splicing of thick material again.Require according to sewing: when the straight shape linear slit of the thin sewing of sewing, under the short situation of needle gage, thread take-up tension lever be to lack for the line amount; When the curved linear slit of the thicker sewing of sewing, directly longer, and under the situation of transverse width when maximum to needle gage, thread take-up tension lever be must be more for the line amount.Former design be by latter event determine thread take-up tension lever for the line amount.(this machine according to survey thread take-up tension lever for line amount 120mm) improve after the design thread take-up tension lever for line amount adjustable range be that 122～113mm has 122,119,116, four kinds of 113mm etc. are for the line amount, require to select for different sewing.(above-mentioned thread take-up tension lever is the data of Preliminary design only for the numerical value of line amount, makes amendment by practical probation.)
In Figure 10, on wheel be provided with on 35 four lines (and can on the lines subscript 1,2,3,4, letter) casing go up wheel 35 near a gauge point is arranged, use as the target of regulating the line amount.
As being shown in each part and relative position figure thereof of embodiments of the invention among Fig. 8.Wherein part 1～13 is shanks of five lever take-up mechanisms, part 14～23rd, and the manipulation of wobble crank is partly.Part 24～34th is regulated the adjusting part of thread take-up tension lever for the line amount.
Thread take-up crank 4 is installed on the main shaft 2, and fixes it by a main screw 5.(main shaft be installed on the front shaft sleeve 3 and rear axle housing in, two axle sleeves are installed on the casing, main shaft rotates flexibly essential.) axis hole of thread take-up tension lever 8 is installed on the diameter of axle of needle bar crank 6, and be installed on the thread take-up crank 4, fixing by screw 7.Another stomidium of thread take-up tension lever is installed on the diameter of axle of line-choosing connecting rod 9, and by rivet 10 riveting of axis hole end face is lived, and it is radially rotated flexibly, and axially can not go here and there.The axle of line-choosing connecting rod 9 another stomidiums and wobble crank 11 rotates flexibly.The axis body of wobble crank 11 is installed in and rotates (axle sleeve 12 is installed on the casing, and fastening by screw 13) flexibly in the axle sleeve 12.Rocking bar 14 is installed on the axial region of wobble crank 11, screws screw 15 and makes positioning action, screws screw 16 and does fastening effect.Eccentric wheel 21 is installed on the end face of eccentric wheel seat 26; On the eccentric wheel seat two concentrically ringed arc grooves are arranged, in these two arc grooves an axial screw 24 and elastic washer 25 are installed respectively, the screw of its axial screw partly is tightened on the plane of eccentric wheel 21.Any one hole of four locating holes on location Xiao 29 that spring 30 is housed on the eccentric wheel seat 26 and eccentric end face is done the location and is used.Eccentric wheel 21 (axis hole and main shaft are slidingly matched) and eccentric wheel seat are installed on the main shaft 2, are fixed by 2 screws 27 (locate for, and fastening).Needle bearing 20 be installed in connecting rod 19 axis holes and the axle position of eccentric wheel 21 on.Eccentric wheel cover plate 22 is installed on the eccentric wheel end fixing with two screws 23.Circular cone axial screw 17 (or cylinder axial screw) and nut 18 and connecting rod 19 another stomidiums and rocking bar 14 hinges.Button torsion spring 32 is enclosed within the axle of button 31 and is installed on the casing, is lived by 33 grades of cover plates, and cover plate 39 is fixing by screw 31; When the shaft end that reverses and press the button 31 its buttons snaps in the groove of eccentric cylindrical, take turns in the rotation to make eccentric wheel 21 do relative position rotation around the alignment of shafts with eccentric wheel seat 26, promptly regulate the many or few of thread take-up tension lever for the line amount; When hand leaves button 31, button torsion spring 32 sprung push buttons, button rotation resets.If select best line amount not during a certain center position in four locating holes, fix it with the screw in the eccentric wheel 28.
More than be that the present invention is used for thin material, thick material, straight shape, curved linear slit are directly to the 300 class chain stitch sewing machine examples of long and short hands distance with curved wide variety.Also be one of machine of 300 class chain stitch sewing machine needlework need line quantitative change maximum, promptly require thread take-up tension lever bigger variation to be arranged for the line amount.The present invention can satisfy this requirement.
(comprise shuttle because can work out adjustable five lever take-up mechanisms of line amount and the string-hooking mechanism of various 300 class stitchings of supplying of the present invention without departing from the spirit and scope of the present invention, horizontal rotary hook, horizontal rotating shuttle) matches and the example of the various uses Sewing machines formed with other mechanism.
Above-mentioned 300 class stitchings meet the stitching pattern of GB4515-84 " classification of stitching and term " regulation.
Claims (2)
1. one kind is used for 300 class chain stitch sewing machines and can regulates five lever take-up mechanisms for the line amount, and the position that comprises five lever take-up mechanisms that five member hinges such as thread take-up crank [I] (4), wobble crank [II] (11), line-choosing connecting rod [III] (9), thread take-up tension lever [IV] (8), casing [V] (1) etc. are formed and wobble crank [II] (11) axle is connected with crank and rocker mechanism makes up and the main shaft (2) of driving Sewing machines; It is characterized in that thread take-up crank [I] (4) is fixed on main shaft (2), main shaft (2) is installed in the axis hole of casing [V] (1) and rotates; The axle of wobble crank [II] (11) is installed in another axis hole of casing [V] (1) does reciprocal rotation.
2. five lever take-up mechanisms of regulating for the line amount according to claim 1, it is characterized in that, the position of wobble crank [II] (11) axle is connected the crank and rocker mechanism of combination with crank and rocker mechanism: mainly by eccentric wheel (21), four members such as connecting rod (19), rocking bar (14), frame (casing 1) are formed, rocking bar (14) is fixed on wobble crank [II] (11) axle, and eccentric wheel (21) is fixed on the main shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94112046A CN1037018C (en) | 1994-02-08 | 1994-02-08 | Five-lever thread pickup mechanism with adjustable thread feed for sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94112046A CN1037018C (en) | 1994-02-08 | 1994-02-08 | Five-lever thread pickup mechanism with adjustable thread feed for sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1094768A CN1094768A (en) | 1994-11-09 |
| CN1037018C true CN1037018C (en) | 1998-01-14 |
Family
ID=5035858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94112046A Expired - Fee Related CN1037018C (en) | 1994-02-08 | 1994-02-08 | Five-lever thread pickup mechanism with adjustable thread feed for sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1037018C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105780324B (en) * | 2016-05-19 | 2018-06-29 | 拓卡奔马机电科技有限公司 | Use in sewing machine supplies line mechanism and sewing machine |
| CN107099947B (en) * | 2017-04-27 | 2020-05-05 | 杰克缝纫机股份有限公司 | Thread take-up stroke adjustable structure and sewing machine |
| CN107090673B (en) * | 2017-06-16 | 2019-09-13 | 杰克缝纫机股份有限公司 | A kind of simple take-up regulating mechanism of sewing machine and sewing machine |
| CN107245818B (en) * | 2017-06-16 | 2019-11-19 | 杰克缝纫机股份有限公司 | A kind of simple take-up regulating mechanism of sewing machine and sewing machine |
| CN107059267B (en) * | 2017-06-16 | 2019-07-12 | 杰克缝纫机股份有限公司 | A kind of simple take-up regulating mechanism of sewing machine and sewing machine |
| CN107761271B (en) * | 2017-11-22 | 2020-10-27 | 杰克缝纫机股份有限公司 | Sewing machine and take-up eccentric device thereof |
| CN107916505B (en) * | 2017-12-22 | 2023-07-11 | 浙江中捷缝纫科技有限公司 | Thread taking-up and threading mechanism of sewing machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5131338A (en) * | 1990-04-05 | 1992-07-21 | Fritz Gegauf Aktiengesellschaft | Needle thread regulating mechanism for sewing machines |
-
1994
- 1994-02-08 CN CN94112046A patent/CN1037018C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5131338A (en) * | 1990-04-05 | 1992-07-21 | Fritz Gegauf Aktiengesellschaft | Needle thread regulating mechanism for sewing machines |
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| Publication number | Publication date |
|---|---|
| CN1094768A (en) | 1994-11-09 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19980114 Termination date: 20110208 |