CN2751044Y - Cylinder type sewing-machine feed lifting cam - Google Patents
Cylinder type sewing-machine feed lifting cam Download PDFInfo
- Publication number
- CN2751044Y CN2751044Y CN 200420009789 CN200420009789U CN2751044Y CN 2751044 Y CN2751044 Y CN 2751044Y CN 200420009789 CN200420009789 CN 200420009789 CN 200420009789 U CN200420009789 U CN 200420009789U CN 2751044 Y CN2751044 Y CN 2751044Y
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- China
- Prior art keywords
- circular arc
- lifting cam
- tooth
- section
- zone
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a tooth-lifting cam for a cylinder-shaped sewing machine, which comprises a tooth-lifting cam of which the inner ring is provided with transmission teeth. An outer circle of the cam is composed of four sections of circular arc areas with the same diameters and three different radiuses. The utility model uses a tooth-lifting cam to take the place of an original eccentric wheel; the moving track of a feeding mechanism of the utility model forms a rectangular shape to form horizontal feed, which makes a machine more stably and quickly work and makes thread marks more uniform and beautiful, and accordingly, the sewing quality is improved.
Description
Technical field
The utility model relates to a kind of cylindrical sewing machine tooth lifting cam.
Background technology
It is the eccentric annulus wheel that inner ring has driving cog that existing Sewing machines is lifted tooth device eccentric wheel, by the transmission of lifting the tooth pin feeding tooth is moved up and down by its eccentric excircle of gear drive, and its feeding tooth movement locus is camber line.When eccentric wheel rotates from minimum point toward peak, cradle moves toward peak together with the feeding tooth under the transmission of lifting the tooth pin, when the feeding tooth moves to pin and equalizes face, feeding pressure mechanism presses down and puts in place, when the feeding tooth from the needle plate plane motion to peak feeding process, the feeding tooth must overcome the downward pressure of feeding pressure mechanism and gravity and make and lift tooth device overload; And, make feeding not smooth because feeding tooth movement locus is camber line; Because parts are stressed irregular in the cycling, easily cause the local accessory of feeding to damage too early, influence Sewing machines performance and service life of a machine.
The utility model content
The utility model technical issues that need to address just are to overcome the defective of prior art, a kind of cylindrical sewing machine tooth lifting cam is provided, it substitutes former eccentric wheel with tooth lifting cam, its feed mechanism movement locus is rectangular, form straight feeding and make machine works more steady, more brisk, the seam order is more evenly attractive in appearance, thereby improves sewing quality.
For addressing the above problem, the utility model adopts following technical scheme:
The utility model cylindrical sewing machine tooth lifting cam comprises that inner ring has the tooth lifting cam of driving cog, and described cam outer ring is made up of four sections isometrical circular arc zones of three kinds of different radiis.
First section circular arc described in the utility model is the circular arc zone of a 30-150 degree radian, is an isometrical circular arc zone; Second section circular arc is one and the above-mentioned isometrical zone institute circular arc zone to the 30-150 degree radian on top, also is an isometrical circular arc zone, the concentric but different radii in first section, second section two circular arcs zone; The 3rd section, four arcs are two isometrical circular arc zones between first section and second section circular arc zone, both same radius but concentric not.
Preferably, four arcs described in the utility model is regional for waiting radian circular arc zone.
The utility model tooth lifting cam is worked in coordination with two tooth lifting cam seats, tooth lifting cam pad, protecting covers and is lifted tooth pin composition and lift the tooth device.The tooth lifting cam internal tooth is engaged on the driving gear of power transmission shaft during use, during sewing, driving gear rotates, because the tooth lifting cam internal tooth cooperates with driving gear, driving tooth lifting cam rotates in the tooth lifting cam seat, tooth lifting cam is when moving from minimum point toward peak, cradle drives the feeding tooth toward the peak motion under the transmission of lifting the tooth pin, feeding pressure mechanism press down put in place before, the feeding tooth moves to peak from minimum point under uncharge state, then with feeding pressure mechanism horizontal movement in the zone of 30-150, whole feeding process is the straight feeding state, then roll back minimum point in that no load condition is following again, horizontal movement is back to the starting point of work, do action like this in the 30-150 zone.
Adopt that the utility model tooth lifting cam forms lift the tooth device after, its feed mechanism movement locus is rectangular, forms straight feeding and makes machine works more steady, more brisk, the seam order is more evenly attractive in appearance, thereby improves sewing quality.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
As shown in Figure 1, the utility model cylindrical sewing machine tooth lifting cam comprises that inner ring has the tooth lifting cam of driving cog 5, and described cam outer ring is made up of four sections isometrical circular arc zones of three kinds of different radiis.Described four arcs zone is for waiting radian circular arc zone, and each circular arc zone is 90 degree radians.
First section, second section two circular arc zones 1,2, with one heart but different radii; The 3rd section, four arcs are two isometrical circular arc zones 3,4 between first section and second section circular arc zone, both same radius but concentric not.
The utility model cylindrical sewing machine tooth lifting cam comprises that inner ring has the tooth lifting cam of driving cog 5, and described cam outer ring is made up of four sections isometrical circular arc zones of three kinds of different radiis.
First section, second section two circular arc zones are the circular arc zone of 30 degree radians, and both with one heart but different radii; The 3rd section, four arcs are two isometrical circular arc zones between first section and second section circular arc zone, both same radius but concentric not.
The utility model cylindrical sewing machine tooth lifting cam comprises that inner ring has the tooth lifting cam of driving cog 5, and described cam outer ring is made up of four sections isometrical circular arc zones of three kinds of different radiis.
First section, second section two circular arc zones are the circular arc zone of 150 degree radians, and both with one heart but different radii; The 3rd section, four arcs are two isometrical circular arc zones between first section and second section circular arc zone, both same radius but concentric not.
Claims (3)
1, a kind of cylindrical sewing machine tooth lifting cam comprises that inner ring has the tooth lifting cam of driving cog (5), is characterized in that: described cam outer ring is made up of four sections isometrical circular arc zones (1,2,3,4) of three kinds of different radiis.
2, tooth lifting cam as claimed in claim 1 is characterized in that: the circular arc zone (1) that described first section circular arc is a 30-150 degree radian is an isometrical circular arc zone; Second section circular arc is one and the above-mentioned isometrical zone institute circular arc zone (2) to the 30-150 degree radian on top, also is an isometrical circular arc zone, the concentric but different radii in first section, second section two circular arcs zone; The 3rd section, four arcs are two isometrical circular arc zones (3,4) between first section and second section circular arc zone, both same radius but concentric not.
3, tooth lifting cam as claimed in claim 1 or 2 is characterized in that: described four arcs zone is for waiting radian circular arc zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420009789 CN2751044Y (en) | 2004-11-29 | 2004-11-29 | Cylinder type sewing-machine feed lifting cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420009789 CN2751044Y (en) | 2004-11-29 | 2004-11-29 | Cylinder type sewing-machine feed lifting cam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2751044Y true CN2751044Y (en) | 2006-01-11 |
Family
ID=35932221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420009789 Expired - Fee Related CN2751044Y (en) | 2004-11-29 | 2004-11-29 | Cylinder type sewing-machine feed lifting cam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2751044Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077690A1 (en) * | 2022-10-14 | 2024-04-18 | 浙江美机缝纫机有限公司 | Rectangular track feeding mechanism on sewing machine |
-
2004
- 2004-11-29 CN CN 200420009789 patent/CN2751044Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077690A1 (en) * | 2022-10-14 | 2024-04-18 | 浙江美机缝纫机有限公司 | Rectangular track feeding mechanism on sewing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |