CN1439760A - Lower shaft driving mechanism of sewing machine - Google Patents
Lower shaft driving mechanism of sewing machine Download PDFInfo
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- CN1439760A CN1439760A CN 03105473 CN03105473A CN1439760A CN 1439760 A CN1439760 A CN 1439760A CN 03105473 CN03105473 CN 03105473 CN 03105473 A CN03105473 A CN 03105473A CN 1439760 A CN1439760 A CN 1439760A
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- lower shaft
- gear
- bearing
- sewing machine
- machine frame
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Abstract
The patent relates to a lower shaft driving mechanism without oil-feed structure in a sewing machine having a lower shaft performing rocking motion, which has a converting means 1 for converting the rotary motion of an upper shaft 10 to a rocking motion, a rocking rotator connected to the converting means and having a large pendulum gear 3 rockably rotating around a large pendulum shaft supported on a sewing machine frame, and a lower shaft 7 where a lower shaft gear 6 meshing with the large pendulum gear is fixed and rotary motion of the upper shaft is transmitted by both gears to rockably rotate. The present invention is characterized in that the mechanism has a bearing 8, the outer periphery of which is fixed to the sewing machine frame 11, and the gear side of the lower shaft is rotatably supported on the inner periphery thereof. The outer periphery of the bearing is formed cylindrical with eccentricity to the shaft center of the inner periphery, and the bearing where the lower shaft is passed is rotated with respect to the sewing machine frame to thereby adjust backlash of the large pendulum gear and the lower shaft gear.
Description
Technical field
The present invention relates to a kind of lower shaft driving mechanism of putting on gear and lower shaft gear and carrying out the Sewing machines of oscillating motion that has, particularly relate to the lower shaft driving mechanism of the Sewing machines that can adjust the backlash of putting on gear and lower shaft gear.
Background technology
It with Fig. 5 traditional lower shaft driving mechanism that rotation that the example explanation will be gone up axle is delivered to lower shaft.This conventional example for lower shaft is not to carry out the wholecircle revolution but the driving mechanism that carries out oscillating motion, has and not shown goes up a big balance staff 104 and the lower shaft 107 that axle be arranged in parallel.
Big balance staff 104, by both ends 104a with the peripheral part on the same axle center D, 104b and three parts with central portion 104c of the peripheral part on the axle center E with this both ends off-centre constitute, both ends 104a, 104b, be fixed on the sewing machine frame with the limit screw (not shown), and be rotatably supported on the pars intermedia 104c putting on gear 103.
Last axle and lower shaft 107 are supported on the frame rotationally, and put on the end that lower shaft gear 106 that gear 103 meshes is fixed on lower shaft 107.
The upper end of toggle-action lever 101 is connected on the axle, and its lower end is rotatably connected to and puts on the gear 103 by putting on pin 102.And though the connecting portion of putting on gear 103 and connecting crank bar 101 shown in Fig. 5 is positioned at the top, under the state of actual assembled, this connecting portion is in the side of pivot center.
When last axle rotated, toggle-action lever 101 swing along the vertical direction, and making and putting on gear 103 is that swing at the center with the axle center E of the central portion 104c of big balance staff 104.Bringing and put on the lower shaft gear 106 of gear 103 engagement and lower shaft 107 thus is the center swing with the axle center F of lower shaft 107.
Even during the gears engaged of only rotating in one direction usually, but when the backlash between two gears increases, will produce noise and vibration, because above-mentioned two gears 103,106 carry out high speed swinging, so if the backlash of 103,106 of two gears increases, then can produce great noise and vibration, therefore need to adjust backlash.
When carrying out the backlash adjustment, will the clamp-screw (not shown) that big balance staff 104 is fixed on the sewing machine frame be unscrewed, making big balance staff 104 is that rotate at the center with the axle center D of both ends 104a, 104b.Like this, pars intermedia 104c and put on the change in location of the eccentric axle center E of gear 103.Therefore, the variable in distance between the axle center F of this axle center E and lower shaft 107 and lower shaft gear 106 can be adjusted the backlash of putting on 106 of gear 103 and lower shaft gears.After backlash adjusted to appropriate amount, big balance staff 104 is fixed on the frame once more with clamp-screw.
In addition, traditional Sewing machines carries out sliding motion with high speed when Sewing machines turns round, so produce the position injection lubricating oil of the deadlocked grade of heating in meeting.To the situation of above-mentioned lower shaft driving mechanism, be to big balance staff 104 and the sliding surface oiling of putting on gear 103.
When like this injecting lubricating oil, it is deadlocked to produce heating when injection rate is very few, has served as for a long time and can produce the lubricating oil water clock from sliding position, exists unavoidably to pollute the problem that cloth etc. is made thing.
For this reason, in recent years to the no oiling development of not carrying out fuel feeding.For example, when lower shaft 7 is the lower shaft driving mechanism of wholecircle revolution Sewing machines, use slide unit instead bearing support structure, implement no oiling.
But, as above-mentioned conventional art, when being the lower shaft drives structure of swing, because following reason is difficult to slide unit is changed into the no oiling of bearing, so do not implement with lower shaft 7.，
Promptly, as the lower shaft driving mechanism of above-mentioned conventional art, when the position of the axle center E that gear 103 sides are put in fixed-site and the adjustment of lower shaft 107 axle center F, in order to implement not have oiling, must will put on gear 103 is fixed on the big balance staff 104, and the two ends of big balance staff 104 are bearing on the frame with bearing, make and put on gear 103 and swing for one, perhaps will put on gear 103 usefulness bearings and be bearing on the big balance staff 104 with big balance staff 104.
Putting on that gear 103 is fixed on the big balance staff 104 and the two ends of big balance staff 104 being bearing on the frame, making when putting on gear 103 and swinging for one with big balance staff 104 with bearing, press the conventional art of Fig. 5, balance staff 104 can not be as eccentric shaft greatly.To adjust backlash by the axle center E that gear 103 is put in change, just must adjust handle greatly balance staff 104 be bearing in the position of the bearing at the two ends on the sewing machine frame.But this is adjusted, the translation that should keep axle center E, and the position of bearings at both ends is adjusted on a side one side ground again, and its operation is difficulty very.In addition, for make adjust easy, just must be with the bearing at two ends to can parallel mobile structure of while with the vertical direction of axle center E, structure must be complicated.
In the time will putting on gear 103 usefulness bearings and be bearing on the big balance staff 104, make the axle center of putting on gear 103 to big balance staff 104 off-centre, need to adjust its offset.But, if use the bearing that does not need oiling, then need increase the external diameter of putting on gear 103 at the bearing portion of putting between gear 103 and the big balance staff 104, so just strengthened moment of inertia.Become big if put on the appearance and size of gear 103, then the centre-to-centre spacing between the gear 103,106 can increase, and lower shaft gear 106 also can increase, and makes the whole further increase of device.In addition, as above-mentioned conventional art, toggle-action lever 101 is put on the Sewing machines that gear 103 and lower shaft 7 carry out oscillating motion, and the direction of motion is when doing forward and reverse conversion, and great load will bear in bearing portion.Therefore, the Sewing machines that duty ratio lower shaft 7 in the bearing portion is done wholecircle revolution (only a direction is rotated) is big, therefore shortened and large-scalely put on gear 103 and the life-span of gear 103 each bearings is put in supporting, and improved self cost of putting on parts around the gear 103.
For this reason, the lower shaft 7 of lower shaft driving mechanism is not for implementing no oiling on the Sewing machines that carries out oscillating motion.
Summary of the invention
The object of the present invention is to provide a kind ofly on Sewing machines, realize the lower shaft driving mechanism of no oiling structure with the lower shaft that carries out oscillating motion.
In order to achieve the above object, according to the present invention, have: will go up rotatablely moving of axle and change into the mapping device of oscillating motion, with be provided with described mapping device be connected, be bearing in big balance staff on the sewing machine frame be the center swing the rotating swing revolving body of putting on gear and fixing and described put on lower shaft gear that gear is meshed and by described two gear transmission described go up spool rotatablely move, swing rotating lower shaft; It is characterized in that: bearing with gear side rotation that periphery is fixed on the sewing machine frame, interior Zhou Zhicheng described lower shaft, the periphery of this bearing, be formed cylindrical shape, rotate relative to sewing machine frame and adjust the described backlash of putting on gear and described lower shaft gear so that pass down the described bearing of Spindle Status with respect to the axle center off-centre in week in described.
Description of drawings
Fig. 1 is the stereogram of present embodiment.
Fig. 2 is the embodiment exploded perspective view of the lower shaft driving mechanism of Sewing machines of the present invention.
Fig. 3 is the cutaway view of the major part of present embodiment.
Fig. 4 is the graph of a relation in the gear side axle center of the periphery of lower shaft axle sleeve of present embodiment and interior all axle center and lower shaft.
Fig. 5 is traditional Sewing machines lower shaft driving mechanism.
Among the figure: the periphery axle center of A-lower shaft axle sleeve, interior all axle center of B-lower shaft axle sleeve, 1-toggle-action lever (mapping device), 3-put on gear (swing rotor), 6-lower shaft gear, 7-lower shaft, 8-Lower shaft sleeve (bearing), week in the 8a-lower shaft axle sleeve periphery, 8b-lower shaft axle sleeve, 11-sewing machine frame (Sewing machines framework).
The specific embodiment
Below, with reference to Fig. 1-Fig. 4 specific embodiments of the invention are described.Lower shaft driving mechanism according to the Sewing machines of present embodiment has toggle-action lever (mapping device) 1, puts on pin 2, puts on gear 3, big balance staff 4, big pendulum bearing 5, lower shaft gear 6, lower shaft 7, lower shaft axle sleeve 8, lower shaft bearing 9 and go up axle 10 etc.This Sewing machines is half revolution rotating shuttle Sewing machines, and its lower shaft 7 is not the wholecircle revolution, but more than 200 degree, for example swings rotation in the scope of 220 degree.
The upper end of toggle-action lever 1 is connected on the axle 10 by eccentric cam 14, and the lower end can swingingly be connected to and puts on the gear 3 by putting on pin 2.Put on gear 3 usefulness clamp-screws 15 and be fixed on the big balance staff 4, the two ends of big balance staff 4 can swingingly be supported on the sewing machine frame (Sewing machines framework) by the big pendulum bearing 5 that is fixed on the not shown sewing machine frame.
Rotatablely moving of last axle 10 is transformed into the roughly oscillating motion of above-below direction by toggle-action lever 1.The swing of toggle-action lever 1 above-below direction is delivered to and puts on gear 3 by putting on pin 2, and the axle center C that converts to big balance staff 4 is the oscillating motion at center.Put on gear 3 and constituted the swing revolving body with big balance staff 4.
Lower shaft gear 6 is fixed on the same axle center B with lower shaft 7 in a side of lower shaft 7.Be meshed with putting on gear 3 by lower shaft gear 6, the oscillating motion of putting on gear 3 is delivered to lower shaft 7, making lower shaft 7 is that revolution is swung at the center with axle center B.Lower shaft 7 is by two lower shaft axle sleeves, 8,18 rotatable being supported in freely on the sewing machine frame (Sewing machines framework) 11.
And, without gear 3,6, toggle-action lever 1 is connected to lower shaft 7 by pin, like this, though the rotation of going up axle 10 can be delivered to lower shaft gear 6,, at this moment lower shaft 7 can not be swung revolution in the scope that surpasses 180 degree, therefore must increase the swing angle of revolution by geared system.
The lower shaft axle sleeve 8 of lower shaft gear 6 sides is made of cylindrical minor diameter 8A and large-diameter portion 8B, and minor diameter 8A is inserted on the sewing machine frame 11, and is fixed on this sewing machine frame 11 with clamp-screw 12.Lower shaft bearing 9 is installed among interior all 8b of large-diameter portion 8B, is rotated by these lower shaft bearing 9 supporting lower shafts 7.The axle center A of the periphery 8a of minor diameter 8A is to the axle center B off-centre of interior all 8b of major diameter 8B.
Another lower shaft axle sleeve 18 is inserted and secured on the sewing machine frame 11, and lower shaft bearing 19 has been installed in its inside, supports lower shaft 7 by this lower shaft bearing 19 and rotates.
When the backlash of 6 of gear 3 and lower shaft gears is put in adjustment, under the state that passes lower shaft 7, unscrew the trip bolt 12 of lower shaft axle sleeve 8,8 pairs of sewing machine frames 11 of lower shaft axle sleeve are pressed Fig. 4 direction of arrow rotate.The distance L of putting on thus between the lower shaft gear 6 axle center B of the axle center C of gear 3 and lower shaft 7 changes, so will adjust the backlash between two gears 3,6.After adjusting backlash like this, screw trip bolt 12, directly lower shaft axle sleeve 8 is fixed on the sewing machine frame 11.
And in order to adjust backlash, the runout of the lower shaft 7 that the skew in the axle center by the axle sleeve 8,18 that produced when the axle center B of the lower shaft gear 6 sides skew causes owing to compare very for a short time with the fore-and-aft distance between two bearings, is therefore absorbed by the flexible of lower shaft 7.And as the situation of present embodiment, the situation of the half rotating oscillating motion that lower shaft 7 carries out is compared with the situation that lower shaft 7 carries out the full rotation campaign, and the runout of this lower shaft 7 is little, so can not have problems.
In the present embodiment, the state that passes lower shaft axle sleeve 8 with lower shaft 7 rotates with respect to sewing machine frame 11, can adjust the backlash of putting between gear 3 and the lower shaft gear 6, so swing rotating lower shaft 7 driving mechanisms in that the necessary sliding part of traditional oiling needn't be set, can implement not have oiling.That is, will put on gear 3 and be fixed on the big balance staff 4, and make big balance staff 4 free rotation ground supportings on sewing machine frame by big pendulum bearing 5, so the sliding part that needs oiling needn't be set again.
And, the axle center B ' in week position relation (Fig. 2) in the part that the lower shaft bearing 19 of the axle center B of all 8b and lower shaft axle sleeve 18 is installed in the axle center C that puts on gear 3 and big balance staff 4 during assembling, the large-diameter portion 8B of lower shaft axle sleeve 8, when being configured in coaxial going up with two lower shaft axle sleeves 8,18, be axle center B and axle center B ' when consistently disposing, the backlash that two gears are 3,6 is zero relation in design.According to such configuration, be to adjust backlash, axle sleeve 8,18 axle center that produce during the axle center B skew of lower shaft gear side 6 misfit minimum.
Above-mentioned embodiments of the invention have been described with reference to the accompanying drawings, but the present invention is not only limited to these embodiment, and numerous variations can be arranged.
According to lower shaft drives structure of the present invention, pass the state of bearing and rotate with lower shaft with respect to sewing machine frame, can adjust the described backlash of putting on gear and described lower shaft gear, thus the necessary sliding part of traditional oiling needn't be set, so can realize not having fuel feedingization.
Claims (1)
1. the lower shaft driving mechanism of a Sewing machines has:
The mapping device that rotatablely moving of last axle changed into oscillating motion and
Be provided with described mapping device be connected, be bearing in big balance staff on the sewing machine frame be the center swing the rotating swing revolving body of putting on gear and
Fixing and described put on lower shaft gear that gear is meshed and by described two gear transmission described go up spool rotatablely move, swing rotating lower shaft; It is characterized in that:
Bearing with gear side rotation that periphery is fixed on the sewing machine frame, interior Zhou Zhicheng described lower shaft,
The periphery of this bearing is formed the cylindrical shape with respect to the axle center off-centre in week in described,
Rotate relative to sewing machine frame and adjust the described backlash of putting on gear and described lower shaft gear so that pass down the described bearing of Spindle Status.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP200244599 | 2002-02-21 | ||
| JP2002044599A JP2003236282A (en) | 2002-02-21 | 2002-02-21 | Lower shaft driving mechanism of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1439760A true CN1439760A (en) | 2003-09-03 |
| CN1325718C CN1325718C (en) | 2007-07-11 |
Family
ID=27783916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031054730A Expired - Fee Related CN1325718C (en) | 2002-02-21 | 2003-02-21 | Lower shaft driving mechanism of sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2003236282A (en) |
| CN (1) | CN1325718C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614117B (en) * | 2003-11-07 | 2010-09-15 | 兄弟工业株式会社 | Sewing machine |
| CN101935924A (en) * | 2009-06-29 | 2011-01-05 | 兄弟工业株式会社 | Sewing machines and anchor clamps |
| CN102535048A (en) * | 2010-12-31 | 2012-07-04 | 日星株式会社 | Upper shaft rotation speed control method of sewing machine |
| CN101519836B (en) * | 2009-03-16 | 2013-03-13 | 中捷缝纫机股份有限公司 | Backlash adjusting mechanism of lower shaft gear and drive gear in a sewing machine |
| CN110055690A (en) * | 2019-04-29 | 2019-07-26 | 吴江阳光科技缝纫机有限公司 | The lubricating arrangement of one koji wrist machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4920951B2 (en) * | 2005-11-04 | 2012-04-18 | Ｊｕｋｉ株式会社 | Bottom bearing mechanism of sewing machine |
| CN103132256A (en) * | 2012-12-17 | 2013-06-05 | 浙江胜佳特种缝制设备有限公司 | Upper shaft and lower shaft transmission structure of computer flat joint knot tying machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85203585U (en) * | 1985-08-24 | 1986-05-21 | 湖南省湘潭市国营江麓机械厂 | Sewing machine with sewing overedge device |
| JPH05337279A (en) * | 1992-06-10 | 1993-12-21 | Aisin Seiki Co Ltd | Sewing machine driving device |
| JP3970948B2 (en) * | 1995-09-13 | 2007-09-05 | ダイコク電機株式会社 | Amusement park data management system |
| CN2501894Y (en) * | 2001-09-19 | 2002-07-24 | 徐俊刚 | Multi-needle sewing machine |
-
2002
- 2002-02-21 JP JP2002044599A patent/JP2003236282A/en active Pending
-
2003
- 2003-02-21 CN CNB031054730A patent/CN1325718C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614117B (en) * | 2003-11-07 | 2010-09-15 | 兄弟工业株式会社 | Sewing machine |
| CN101519836B (en) * | 2009-03-16 | 2013-03-13 | 中捷缝纫机股份有限公司 | Backlash adjusting mechanism of lower shaft gear and drive gear in a sewing machine |
| CN101935924A (en) * | 2009-06-29 | 2011-01-05 | 兄弟工业株式会社 | Sewing machines and anchor clamps |
| CN101935924B (en) * | 2009-06-29 | 2013-08-21 | 兄弟工业株式会社 | Sewing machine and clamping fixture |
| CN102535048A (en) * | 2010-12-31 | 2012-07-04 | 日星株式会社 | Upper shaft rotation speed control method of sewing machine |
| CN102535048B (en) * | 2010-12-31 | 2013-11-06 | 日星株式会社 | Upper shaft rotation speed control method of sewing machine |
| CN110055690A (en) * | 2019-04-29 | 2019-07-26 | 吴江阳光科技缝纫机有限公司 | The lubricating arrangement of one koji wrist machine |
| CN110055690B (en) * | 2019-04-29 | 2024-05-28 | 吴江阳光科技缝纫机有限公司 | Lubricating device of wrist bending machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1325718C (en) | 2007-07-11 |
| JP2003236282A (en) | 2003-08-26 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070711 Termination date: 20100221 |