CN206438279U - One kind rotation thread cutting mechanism and sewing machine - Google Patents
One kind rotation thread cutting mechanism and sewing machine Download PDFInfo
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- CN206438279U CN206438279U CN201720088910.9U CN201720088910U CN206438279U CN 206438279 U CN206438279 U CN 206438279U CN 201720088910 U CN201720088910 U CN 201720088910U CN 206438279 U CN206438279 U CN 206438279U
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- knife rest
- motion
- knife
- thread cutting
- trimming
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Abstract
The utility model belongs to sewing device technical field, refers in particular to a kind of rotation thread cutting mechanism and sewing machine.One of which rotates thread cutting mechanism, includes lower axle, motion knife rest is arranged with lower axle, is provided with knife one on motion knife rest, driving shaft is provided with the chassis backplane of lower axle side, the driving shaft is rotated by power source drive；It is connected between driving shaft and motion knife rest by transmission mechanism；When needing trimming, power source drives transmission mechanism to rotate and then drives motion knife rest rotation, the knife one on motion knife rest is realized rotation trimming action with knife two；When not needing trimming, transmission mechanism is failure to actuate, and motion knife rest is not rotated.The utility model passes through the action that transmission mechanism transmission drives knife one and knife two on motion knife rest to realize rotation trimming, it is to avoid the dependence in existing structure to trimming cam.The motion process of trimming is simplified, and simplifies the structure of whole cutting facility, the reliability of trimming function is high.
Description
Technical field
The utility model belongs to sewing device technical field, refers in particular to a kind of rotation thread cutting mechanism and sewing machine.
Background technology
Sewing machine needs to carry out trimming after every completion once sewing operation, that is, will connect between eedle and sewing
Suture is cut.Traditional sewing machine does not have trimming function in itself, it is necessary to which operating personnel complete trimming action using scissors etc..Pin
The defect existed to artificial trimming, research staff adds trimming function on sewing machine.Such cutting facility includes fixation
Stationary knife on casing, and reciprocating moving knife.Its operation principle is：When progress sewing needs trimming
Wait, drive an arrangement of clutch to carry out cutting facility and sewing machine main motion mechanism by drive device (such as electromagnet, cylinder)
Connection, by the cam with given shape on main motion mechanism (upper axle, lower axle, feed lifting rock shaft etc.), by main motion
The motion of mechanism is delivered in the moving knife drive mechanism of cutting facility according to certain sequential relationship, makes moving knife drive mechanism on demand
Time for wanting, track motion, move the line for needing to cut at stationary knife to by the action such as separated time, bracing wire with moving knife, two edges of a knife
Trimming is realized in occlusion.Complete after trimming action, moving knife drive mechanism resets to original position under the effect such as cam or spring, prepares
Trimming next time.Cutting facility and so on carries out each trimming action.With the enhancing of research and development ability, on sewing machine
Cutting facility pass through long-run development and improvement, be more reliably achieved trimming function；But there are still defect：This is cut
Line apparatus needs the complicated cam parts in a track, and relies on cam locus shape higher, it is necessary to which the accuracy of track is come
Ensure the reliability of trimming function.
The content of the invention
The utility model be for existing technology exist above mentioned problem there is provided a kind of structure and trimming action simplify,
The reliability of trimming function high rotation thread cutting mechanism and sewing machine.
The purpose of this utility model can be realized by following technical proposal：
One of purpose of the present utility model is to provide a kind of rotation thread cutting mechanism, includes lower axle, is covered in lower axle
Provided with motion knife rest, knife one is provided with motion knife rest, driving shaft, the master are provided with the chassis backplane of lower axle side
Moving axis is rotated by power source drive；It is connected between driving shaft and motion knife rest by transmission mechanism；When needing trimming, power
Source drives transmission mechanism to rotate and then drives motion knife rest rotation, the knife one on motion knife rest is realized that rotation trimming is moved with knife two
Make；When not needing trimming, transmission mechanism is failure to actuate, and motion knife rest is not rotated.
In a kind of above-mentioned rotation thread cutting mechanism, the transmission mechanism includes the driven gear being arranged in lower axle and set
The driving gear on driving shaft is put, driving gear can be engaged with driven gear, the motion knife rest is connected with driven gear；
Or：The transmission mechanism includes the driven pulley being arranged in lower axle and the drive pulley being arranged on driving shaft
Wheel, is connected, drive pulley is rotated by belt drive follower belt between drive pulley and driven pulley by belt
Dynamic, the motion knife rest is connected with driven pulley；
Or：The transmission mechanism includes the driven sprocket being arranged in lower axle and the drive sprocket being arranged on driving shaft,
Connected between drive sprocket and driven sprocket by chain, drive sprocket is rotated by chain-driving driven sprocket, the motion
Knife rest is connected with driven sprocket.
In a kind of above-mentioned rotation thread cutting mechanism, the lower outer shaft sleeve is provided with lower axle protheca, the motion knife rest and from
Moving gear is set in outside lower axle protheca.
In a kind of above-mentioned rotation thread cutting mechanism, one end of the driven gear is provided with the shaft shoulder, and motion knife rest is arranged
Connected outside the shaft shoulder, and between motion knife rest and the shaft shoulder by key or spline；
Or：Projection is provided with the end face of the driven gear, jack is provided with motion knife rest, projection is plugged in
The connection of driven gear and motion knife rest is realized in jack；
Or：The motion knife rest is integral type structure with driven gear.
In a kind of above-mentioned rotation thread cutting mechanism, the power source is motor or rotary magnet.
In a kind of above-mentioned rotation thread cutting mechanism, the knife one includes the installation portion being connected with motion knife rest, in peace
The side in dress portion is provided with blade body, blade body and the L-shaped structure of installation portion, and the front end of blade body is provided with knife
Point, rear end is provided with cutting edge.
In a kind of above-mentioned rotation thread cutting mechanism, bracing wire groove is provided with front side of the cutting edge.
In a kind of above-mentioned rotation thread cutting mechanism, the knife two is stationary knife or moving knife.
In a kind of above-mentioned rotation thread cutting mechanism, the motion knife rest makees 360 ° of rotations.
Another purpose of the present utility model is to provide a kind of sewing machine, including a kind of above-mentioned rotation thread cutting mechanism.
Compared with prior art, the utility model has advantages below：
The utility model is driven by transmission mechanism drives the knife one on motion knife rest to rotate the dynamic of trimming with the realization of knife two
Make, it is to avoid the dependence in existing structure to trimming cam.The motion process of trimming is simplified, and simplifies whole cutting facility
Structure, the reliability of trimming function is high.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram that transmission mechanism of the present utility model is gear drive.
Fig. 2 is the schematic diagram of knife one of the present utility model.
Fig. 3 is dimensional structure diagram of the present utility model.
Fig. 4 is the dimensional structure diagram that transmission mechanism of the present utility model is belt gear.
In figure, 1, lower axle；2nd, knife rest is moved；3rd, knife one；4th, chassis backplane；5th, driving shaft；6th, power source；7th, knife two；8、
Driven gear；9th, driving gear；10th, lower axle protheca；11st, installation portion；12nd, blade body；13rd, point of a knife；14th, cutting edge；15th, bracing wire
Groove；16th, eedle；17th, drive pulley；18th, belt.
Embodiment
The following is specific embodiment of the utility model and with reference to accompanying drawing 1-4, the technical solution of the utility model is made into
The description of one step, but the utility model is not limited to these embodiments.
One kind rotation thread cutting mechanism, includes lower axle 1, and motion knife rest 2 is arranged with lower axle 1, is set on motion knife rest 2
Knife 1 is equipped with, driving shaft 5 is provided with the chassis backplane 4 of the side of lower axle 1, the driving shaft 5 drives rotation by power source 6,
The power source 6 is motor or rotary magnet.The present embodiment selects motor.Pass through gear between driving shaft 5 and motion knife rest 2
Mechanism driving is connected；When needing trimming, power source 6 drives gear mechanism to rotate and then drives motion knife rest 2 to rotate, and makes motion knife
Knife 1 on frame 2 realizes rotation trimming action with knife 27；When not needing trimming, gear mechanism is failure to actuate, and motion knife rest 2 does not turn
It is dynamic.Wherein knife 27 can be stationary knife or moving knife.When knife 27 is stationary knife, it is arranged on by screw on chassis backplane 4,
It is that moving knife rotation is engaged completion trimming action with stationary knife by knife 1；During as moving knife, on another knife rest, pass through
Knife rest motion band moving knife 27, which is rotated, is engaged completion trimming action with knife 1.During rotation, motion knife rest 2, knife 27 are 360 ° and turned
It is dynamic.
Specifically, the gear mechanism includes the driven gear 8 being arranged in lower axle 1 and the master being arranged on driving shaft 5
Moving gear 9, driving gear 9 can be engaged with driven gear 8, and the motion knife rest 2 is connected with driven gear 8.
Certainly, gear mechanism can also be driven by setting multiple driven gears to realize, due to the limitation of structure, this implementation
Preferably one driven gear 8 of example is engaged transmission with driving gear 9.
In order that lower axle 1 can be rotated flexibly, generally, lower axle protheca 10 is arranged with outside lower axle 1, and lower axle protheca
10 are fixed in the corresponding mounting hole of chassis backplane 4.Therefore, the motion knife rest 2 and driven gear 8 can also be set in down
Outside axle protheca 10.
Further, the connected mode between driven gear 8 and motion knife rest 2 can be using one of following structures：
One is, one end of the driven gear 8 is provided with the shaft shoulder, and motion knife rest 2 is set in outside the shaft shoulder, and motion knife rest 2
It is connected between the shaft shoulder by key or spline；
Two are, projection is provided with the end face of the driven gear 8, and jack is provided with motion knife rest 2, and projection is inserted
It is located at the connection that driven gear 8 and motion knife rest 2 are realized in jack；
Three are, the motion knife rest 2 is integral type structure with driven gear 8.
Certainly, transmission mechanism can also realize driving shaft 5 and motion except above-mentioned gear mechanism with other modes
Transmission between knife rest 2.
As another embodiment, as shown in figure 4, transmission mechanism selects belt transmission：It is driven in lower axle 1 including being arranged on
Belt pulley and the drive pulley 17 being arranged on driving shaft 5, pass through belt 18 between drive pulley 17 and driven pulley
Connection, drive pulley 17 drives driven pulley to rotate by belt 18, and the motion knife rest 2 is connected with driven pulley.
Motion knife rest 2 is rotated together with driven pulley, and band moving knife 1 is rotated carries out trimming action with knife 27.Wherein, follower belt
Wheel is attached with motion knife rest 2 for integral type structure or by grafting or the mode such as be spirally connected.
As another embodiment, transmission mechanism is also an option that chain drive：Including the driven sprocket being arranged in lower axle 1
And the drive sprocket on driving shaft 5 is arranged on, connected between drive sprocket and driven sprocket by chain, drive sprocket passes through chain
Bar drives driven sprocket to rotate, and the motion knife rest 2 is connected with driven sprocket.Motion knife rest 2 is rotated together with driven sprocket, band
Moving knife 1 is rotated carries out trimming action with knife 27.Equally, driven sprocket is integral type structure with motion knife rest 2 or passes through grafting
Or the mode such as be spirally connected is attached.
Further, since the utility model uses rotation trimming, therefore, traditional moving knife can not be applied to this structure.
The knife 1 includes the installation portion 11 being connected with motion knife rest 2, and the side of installation portion 11 is provided with blade body 12, knife
Piece body 12 and the L-shaped structure of installation portion 11, point of a knife 13 are provided with the front end of blade body 12, rear end is provided with cutting edge 14.
Bracing wire for convenience, bracing wire groove 15 is provided with the front side of cutting edge 14.
Another purpose of the present utility model is to provide a kind of sewing machine, including a kind of above-mentioned rotation thread cutting mechanism.
Operation principle of the present utility model (by taking gear drive as an example)：
When need not carry out trimming, motion knife rest 2 and driven gear 8 are not rotated.
When control system receives trimming order, the rotating shuttle being arranged in lower axle 1 is gone to before trimming angle, control system
Signaled to power source, power source 6 starts, drive driving shaft 5 to rotate and then drive driving gear 9 to rotate；Drive motion knife rest 2
And knife 1 rotates, the point of a knife 13 of knife 1 passes through the wire loop of upper thread, bracing wire groove 15 with upper thread on one side and bottom line to knife 27 (
The stationary knife of embodiment) it is mobile, when the cutting edge 14 of the knife 1 (i.e. moving knife) with line is engaged with the cutting edge of knife 27, line is cut
It is disconnected, complete trimming action.
After line is cut off, gear mechanism is rotated further with motion knife rest 2, until eedle 16 is stopping the stopping of pin position, knife 1
Stop position is returned to, next trimming operation is waited.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement or using similar to described specific embodiment
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Claims (10)
1. one kind rotation thread cutting mechanism, includes lower axle (1), it is characterised in that：Motion knife rest (2) is arranged with lower axle (1),
Knife one (3) is provided with motion knife rest (2), driving shaft (5) is provided with the chassis backplane (4) of lower axle (1) side, it is described
Driving shaft (5) is driven by power source (6) and rotated；It is connected between driving shaft (5) and motion knife rest by transmission mechanism；Need
During trimming, power source (6) drives transmission mechanism to act and then drives motion knife rest (2) rotation, makes the knife one on motion knife rest (2)
(3) rotation trimming action is realized with knife two (7)；When not needing trimming, transmission mechanism is failure to actuate, and motion knife rest (2) is not rotated.
2. a kind of rotation thread cutting mechanism according to claim 1, it is characterised in that：The transmission mechanism includes being arranged on down
Driven gear (8) on axle (1) and the driving gear (9) being arranged on driving shaft (5), driving gear (9) can and driven gear
(8) engage, the motion knife rest (2) is connected with driven gear (8)；
Or：The transmission mechanism includes the driven pulley being arranged in lower axle (1) and the active skin being arranged on driving shaft (5)
Belt wheel, is connected between drive pulley and driven pulley by belt, and drive pulley is rotated by belt drive driven pulley,
The motion knife rest (2) is connected with driven pulley；
Or：The transmission mechanism includes the driven sprocket being arranged in lower axle (1) and the drive chain being arranged on driving shaft (5)
Wheel, is connected, drive sprocket is rotated by chain-driving driven sprocket, the fortune between drive sprocket and driven sprocket by chain
Movable knife rack (2) is connected with driven sprocket.
3. a kind of rotation thread cutting mechanism according to claim 2, it is characterised in that：Lower axle is arranged with outside the lower axle (1)
Protheca (10), the motion knife rest (2) and driven gear (8) are set in lower axle protheca (10) outside.
4. a kind of rotation thread cutting mechanism according to Claims 2 or 3, it is characterised in that：One end of the driven gear (8)
The shaft shoulder is provided with, motion knife rest (2) is set in outside the shaft shoulder, and motion knife rest (2) is connected between the shaft shoulder by key or spline；
Or：Projection is provided with the end face of the driven gear (8), jack is provided with motion knife rest (2), projection is plugged
The connection of driven gear (8) and motion knife rest (2) is realized in jack；
Or：The motion knife rest (2) is integral type structure with driven gear (8).
5. a kind of rotation thread cutting mechanism according to claim 1, it is characterised in that：The power source (6) is motor or rotation
Turn electromagnet.
6. a kind of rotation thread cutting mechanism according to claim 1, it is characterised in that：The knife one (3) includes and moved
The installation portion (11) of knife rest (2) connection, blade body (12), blade body (12) and peace are provided with the side of installation portion (11)
Dress portion (11) L-shaped structure, point of a knife (13) is provided with the front end of blade body (12), and rear end is provided with cutting edge (14).
7. a kind of rotation thread cutting mechanism according to claim 6, it is characterised in that：It is provided with front side of the cutting edge (14)
Bracing wire groove (15).
8. a kind of rotation thread cutting mechanism according to claim 1, it is characterised in that：The knife two (7) is stationary knife or moving knife.
9. a kind of rotation thread cutting mechanism according to claim 1, it is characterised in that：The motion knife rest (2) is made 360 ° and turned
It is dynamic.
10. a kind of sewing machine, it is characterised in that：Including a kind of rotation thread cutting mechanism as described in claim any one of 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088910.9U CN206438279U (en) | 2017-01-20 | 2017-01-20 | One kind rotation thread cutting mechanism and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088910.9U CN206438279U (en) | 2017-01-20 | 2017-01-20 | One kind rotation thread cutting mechanism and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206438279U true CN206438279U (en) | 2017-08-25 |
Family
ID=59636176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720088910.9U Active CN206438279U (en) | 2017-01-20 | 2017-01-20 | One kind rotation thread cutting mechanism and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206438279U (en) |
-
2017
- 2017-01-20 CN CN201720088910.9U patent/CN206438279U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 318000 no.1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |
|
| CP03 | Change of name, title or address |