CN201386195Y - Backlash adjusting mechanism of lower shaft gear and transmission gear inside sewing machine - Google Patents
Backlash adjusting mechanism of lower shaft gear and transmission gear inside sewing machine Download PDFInfo
- Publication number
- CN201386195Y CN201386195Y CN200920115630U CN200920115630U CN201386195Y CN 201386195 Y CN201386195 Y CN 201386195Y CN 200920115630 U CN200920115630 U CN 200920115630U CN 200920115630 U CN200920115630 U CN 200920115630U CN 201386195 Y CN201386195 Y CN 201386195Y
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- Prior art keywords
- lower shaft
- gear
- adjusting mechanism
- travelling gear
- bearing
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Abstract
The utility model provides a backlash adjusting mechanism of a lower shaft gear and a transmission gear inside a sewing machine, which belongs to the technical field of machinery and solves the problem that existing sewing machines are low in processing accuracy caused by a lower shaft driving mechanism and the like. The backlash adjusting mechanism of the lower shaft gear and the transmission gear inside the sewing machine comprises a regulating part and a shoulder projecting from the end portion of the transmission gear, the regulating part consists of a cylindrical fixing component and a regulating component, the axial lines of the fixing component and the regulating component are parallel, the regulating component is sleeved on the shoulder, and a locking device for fixing the fixing component and a framework of the sewing machine is disposed between the fixing component and the framework of the sewing machine. The backlash adjusting mechanism has convenient regulation, less pollution to sewed objects and improved processing accuracy.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to the backlash adjusting mechanism of lower shaft gear and travelling gear in the Sewing machines.
Background technology
At present, the employed lower shaft drives structure of industrial high-velocity electrons bar tacking machine is mainly by being the sector gear that supports with the eccentric shaft and being that the lower shaft gear that supports is formed with the lower shaft.In use, after the going up axle and rotate of bar tacking machine, drive lower shaft by the transmission mechanism between last axle and the lower shaft and rotate, make down shaft assembly be implemented in the certain angle scope interior come back rotation.
Be with needle bearing on the lower shaft of shaft assembly under this class bar tacking machine, and lower shaft is a matched in clearance with cooperating of needle bearing.This high speed that is engaged in down shaft assembly is come under the back rotation, easily weares and teares in the auxiliary section of following shaft assembly and needle bearing, and the service time one of Sewing machines is long, can produce the gap between following shaft assembly and the needle bearing, As time goes on, it is big more to wear and tear, and the gap is also big more.This has just brought a series of residual problems, as shakes greatly, the big needle tracking shakiness of noise, and linear slit is bad etc.And the wearing and tearing between sector gear and the lower shaft gear, cause backlash to increase, can produce noise and vibration.In addition,,, need often to add lubricating oil and be lubricated in order to reduce wear because the lower shaft of the following shaft assembly of bar tacking machine is a matched in clearance with cooperating of needle bearing, cumbersome, also can pollute making thing.
For this reason, people design the lower axle structure of Sewing machines, and some has also applied for patent.For example: Chinese patent literature discloses a kind of lower shaft driving mechanism [publication number: CN1439760A] of Sewing machines, 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.
The lower shaft driving mechanism of above-mentioned Sewing machines can realize not having oiling, but when adjusting lower shaft gear and putting on gap between the gear by regulating eccentric structure, can make lower shaft that certain displacement takes place, yet lower shaft is to drive shuttle to rotate, can make shuttle also produce displacement thereupon, influence the precision of processing.
Summary of the invention
The purpose of this utility model is at the above-mentioned problem that exists in the prior art, and the backlash adjusting mechanism of lower shaft gear and travelling gear in a kind of easy to adjust, Sewing machines of adjusting precision height, compact conformation is provided.
The purpose of this utility model can realize by following technical proposal: the backlash adjusting mechanism of lower shaft gear and travelling gear in a kind of Sewing machines, it is characterized in that, this mechanism comprises regulating part and protrudes from the convex shoulder of travelling gear end, regulating part is formed by being fixed part cylindraceous and adjusting portion, the axial line of fixed part and the axis parallel of adjusting portion, adjusting portion is enclosed within on the above-mentioned convex shoulder, is provided with the locking device that both can be fixed between the frame of described fixed part and Sewing machines.
Unclamp locking device, because the axis parallel of fixed part and adjusting portion, rotation is fixed part cylindraceous, adjusting portion is done eccentric motion, distance between the axial line of the axial line of travelling gear and lower shaft gear is changed, adjusted the backlash between Sewing machines lower shaft gear and the travelling gear, backlash is reached to suitable position.Lock locking device again, finish adjustment.
In the backlash adjusting mechanism of lower shaft gear and travelling gear, the described convex shoulder outside is with bearing in above-mentioned Sewing machines, and the adjusting portion of above-mentioned regulating part is enclosed within on the bearing.Bearing outer wall and adjusting portion tight fit, bearing holder (housing, cover) are located at the convex shoulder outside, have born the radial load of convex shoulder, have guaranteed when High-speed machining the stability at convex shoulder place.
In the backlash adjusting mechanism of lower shaft gear and travelling gear, described convex shoulder end is by the positioning screw cap that has been threaded in above-mentioned Sewing machines, and above-mentioned bearing is between positioning screw cap and travelling gear.The screwed in place nut makes bearing can axially not be subjected to displacement the stability when having guaranteed bearing working.
In the backlash adjusting mechanism of lower shaft gear and travelling gear, described locking device is a screw in above-mentioned Sewing machines, and screw passes the fixed part that frame can be resisted against regulating part.Unclamp screw, the fixed part of regulating part can be in the cofree rotation of frame; Tighten screw, screw makes the fixed part of regulating part fastening, realizes locking.
In the backlash adjusting mechanism of lower shaft gear and travelling gear, the quantity of described screw is 2-8 in above-mentioned Sewing machines.Screw can satisfy the fastening requirement in governor motion, and can reach effect preferably in 2-8 this scope.
In the backlash adjusting mechanism of lower shaft gear and travelling gear, the quantity of described bearing is 2-4 in above-mentioned Sewing machines.Requirement when the number of bearing can satisfy mechanism's work in this scope, effective.
In the backlash adjusting mechanism of lower shaft gear and travelling gear, described bearing is a deep groove ball bearing in above-mentioned Sewing machines.Deep groove ball bearing has replaced traditional needle bearing, and mechanism does not need to give the friction position fuel feeding at this bearing place again when running, reduced making the pollution of thing.
Compared with prior art, the backlash adjusting mechanism of lower shaft gear and travelling gear in the Sewing machines that the utility model provides when the gap of regulating between travelling gear and the lower shaft gear, only need unclamp locking device, turn lock part just can be realized the adjusting of backlash, and is easy to adjust.And after regulating, lower shaft gear and lower shaft can not produce displacement, have improved machining accuracy.And deep groove ball bearing replaced traditional needle bearing, and mechanism does not need to give the friction position fuel feeding at this bearing place again when running, reduced making the pollution of thing.
Description of drawings
Fig. 1 is a perspective view of the present utility model.
Fig. 2 is a STRUCTURE DECOMPOSITION schematic diagram of the present utility model.
Fig. 3 is the structure cutaway view at regulating part place in the utility model.
Fig. 4 is the graph of a relation of the axial line of sticking department and adjusting portion in the utility model.
Among the figure, 1, connecting rod; 2, eccentric wheel; 3, go up axle; 4, positioning screw cap; 5, bearing; 6, travelling gear; 6a, convex shoulder; 7, regulating part; 7a, adjusting portion; 7b, fixed part; 8, screw; 9, lower shaft gear; 10, lower shaft; 11, pin; 12, plug; The axial line of A, fixed part; The axial line of B, adjusting portion.
The specific embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
As depicted in figs. 1 and 2, the backlash adjusting mechanism of lower shaft gear and travelling gear comprises regulating part 7, convex shoulder 6a in this Sewing machines, and regulating part 7 is formed the axis parallel of fixed part 7b and adjusting portion 7a by being fixed part 7b cylindraceous and adjusting portion 7a.
The upper end of connecting rod 1 is connected on the axle 3 by eccentric wheel 2, and the lower end of connecting rod 1 can swingingly be connected to by pin 11 on the travelling gear 6 that is fan-shaped, fills lubricating grease in the pin 11 and will sell 11 sealings by plug 12.The bottom of travelling gear 6 is fixed on the end that pin 11 gos deep into travelling gear 6 endoporus with two trip bolts 8.
The convex shoulder 6a outside of travelling gear 6 ends is with two deep groove ball bearings, tightens the positioning screw cap 4 of convex shoulder 6a end by being threaded, and deep groove ball bearing is fixed between positioning screw cap 4 and the travelling gear 6.
The adjusting portion 7a of regulating part 7 is enclosed within on bearing 5 outer walls, and the fixed part 7b of regulating part 7 passes the bottom plate hole on the frame, and trip bolt 8 passes frame and is resisted against on the fixed part 7b, realizes locking action.The axis parallel of fixed part 7b and adjusting portion 7a that is to say the axial line B off-centre of the axial line A of fixed part 7b to adjusting portion 7a.
When adjusting the backlash of lower shaft gear 9 and travelling gear 6, unclamp and pass the trip bolt 8 that frame is resisted against fixed part 7b, as shown in Figure 3 and Figure 4, axial line A with fixed part 7b is the 7b of center rotational fixation portion, adjusting portion 7a does eccentric motion, and thus, variation has taken place the distance between the axial line of the axial line of travelling gear 6 and lower shaft gear 9, backlash between travelling gear 6 and the lower shaft gear 9 is regulated, backlash is reached to suitable position.After adjusting is finished, tighten trip bolt 8, once more fixed part 7b is locked in the bottom plate hole of frame.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has used 1, connecting rod morely; 2, eccentric wheel; 3, go up axle; 4, positioning screw cap; 5, bearing; 6, travelling gear; 6a, convex shoulder; 7, regulating part; 7a, adjusting portion; 7b, fixed part; 8, screw; 9, lower shaft gear; 10, lower shaft; 11, pin; 12, plug; The axial line of A, fixed part; The terms such as axial line of B, adjusting portion, but do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.
Claims (7)
1. the backlash adjusting mechanism of lower shaft gear and travelling gear in the Sewing machines, it is characterized in that, this mechanism comprises regulating part (7) and protrudes from the convex shoulder (6a) of travelling gear (6) end, regulating part (7) is by being fixed part cylindraceous (7b) and adjusting portion (7a) is formed, the axial line of fixed part (A) is parallel with the axial line (B) of adjusting portion, adjusting portion (7a) is enclosed within on the above-mentioned convex shoulder (6a), is provided with the locking device that both can be fixed between the frame of described fixed part (7b) and Sewing machines.
2. the backlash adjusting mechanism of lower shaft gear and travelling gear is characterized in that in the Sewing machines according to claim 1, and described convex shoulder (6a) outside is with bearing (5), and the adjusting portion (7a) of above-mentioned regulating part (7) is enclosed within on the bearing (5).
3. the backlash adjusting mechanism of lower shaft gear and travelling gear in the Sewing machines according to claim 2, it is characterized in that, described convex shoulder (6a) end is by the positioning screw cap that has been threaded (4), and above-mentioned bearing (5) is positioned between positioning screw cap (4) and the travelling gear (6).
4. according to the backlash adjusting mechanism of lower shaft gear and travelling gear in claim 1 or the 2 or 3 described Sewing machiness, it is characterized in that described locking device is screw (8), screw (8) passes the fixed part (7b) that frame can be resisted against regulating part (7).
5. the backlash adjusting mechanism of lower shaft gear and travelling gear is characterized in that in the Sewing machines according to claim 4, and the quantity of described screw (8) is 2-8.
6. the backlash adjusting mechanism of lower shaft gear and travelling gear is characterized in that in the Sewing machines according to claim 2, and the quantity of described bearing (5) is 2-4.
7. the backlash adjusting mechanism of lower shaft gear and travelling gear is characterized in that in the Sewing machines according to claim 6, and described bearing (5) is a deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920115630U CN201386195Y (en) | 2009-03-16 | 2009-03-16 | Backlash adjusting mechanism of lower shaft gear and transmission gear inside sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920115630U CN201386195Y (en) | 2009-03-16 | 2009-03-16 | Backlash adjusting mechanism of lower shaft gear and transmission gear inside sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201386195Y true CN201386195Y (en) | 2010-01-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920115630U Expired - Lifetime CN201386195Y (en) | 2009-03-16 | 2009-03-16 | Backlash adjusting mechanism of lower shaft gear and transmission gear inside sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201386195Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011116912A3 (en) * | 2010-03-24 | 2012-04-05 | Zoje Europe Gmbh | Single-head or multi-head embroidery machine having a two-thread lockstitch rotary looper |
| CN102808296A (en) * | 2012-08-30 | 2012-12-05 | 陈展新 | Crank rocker type rotating shuttle drive mechanism used for embroidery 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 |
| CN103161914A (en) * | 2011-12-08 | 2013-06-19 | 财团法人工业技术研究院 | Helical gear backlash eliminating device |
| US9267223B2 (en) | 2010-03-24 | 2016-02-23 | Zoje Europe Gmbh | Single- or multiple-head embroidery machine having a double-lock-stitch rotating gripper |
-
2009
- 2009-03-16 CN CN200920115630U patent/CN201386195Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2011116912A3 (en) * | 2010-03-24 | 2012-04-05 | Zoje Europe Gmbh | Single-head or multi-head embroidery machine having a two-thread lockstitch rotary looper |
| US9267223B2 (en) | 2010-03-24 | 2016-02-23 | Zoje Europe Gmbh | Single- or multiple-head embroidery machine having a double-lock-stitch rotating gripper |
| CN103161914A (en) * | 2011-12-08 | 2013-06-19 | 财团法人工业技术研究院 | Helical gear backlash eliminating device |
| CN102808296A (en) * | 2012-08-30 | 2012-12-05 | 陈展新 | Crank rocker type rotating shuttle drive mechanism used for embroidery machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100120 Effective date of abandoning: 20090316 |
|
| RGAV | Abandon patent right to avoid regrant |