CN206512417U - A kind of thread cutting mechanism and sewing machine - Google Patents
A kind of thread cutting mechanism and sewing machine Download PDFInfo
- Publication number
- CN206512417U CN206512417U CN201720088908.1U CN201720088908U CN206512417U CN 206512417 U CN206512417 U CN 206512417U CN 201720088908 U CN201720088908 U CN 201720088908U CN 206512417 U CN206512417 U CN 206512417U
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- knife rest
- motion
- lower axle
- motion knife
- knife
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Abstract
The utility model belongs to sewing device technical field, refers in particular to a kind of thread cutting mechanism and sewing machine.One of which thread cutting mechanism, including lower axle, are provided with rotating shuttle in lower axle, in lower outer shaft sleeve provided with motion knife rest, knife one is provided with motion knife rest, motion knife rest is connected with clutch, and clutch makes motion knife rest connect or separate with lower axle by power part driving；During connection, motion knife rest is rotated together with lower axle, and knife one realizes rotation trimming action with knife two；During separation, lower axle is rotated, and motion knife rest is not rotated.The utility model drives motion knife rest and lower axle synchronous rotary to follow rotating shuttle to rotate a circle and then realize with stationary knife to rotate the action of trimming by clutch, 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 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 purpose of this utility model is to provide a kind of structure and trimming action simplifies, the trimming that the reliability of trimming function is high
Mechanism and sewing machine.
What the utility model was realized in：
One of purpose of the present utility model is to provide a kind of thread cutting mechanism, including lower axle, and rotation is provided with lower axle
Shuttle, in lower outer shaft sleeve provided with motion knife rest, is provided with knife one, motion knife rest is connected with clutch, clutch on motion knife rest
Mechanism makes motion knife rest connect or separate with lower axle by power part driving；During connection, motion knife rest is rotated together with lower axle, knife
One realizes rotation trimming action with knife two；During separation, lower axle is rotated, and motion knife rest is not rotated；
The clutch includes the drive shaft being arranged on chassis backplane in the mounting hole of relevant position, drive shaft energy
Moved in mounting hole to rotating shuttle direction or away from rotating shuttle direction, the head of drive shaft is provided with shift fork, one end of shift fork and fortune
Movable knife rack is connected, the afterbody connection power part of drive shaft, and steady pin is provided with the motion knife rest, and steady pin is close to fortune
Movable knife rack endoporus is set, and the rotating shuttle is provided with plane close to the side of motion knife rest, and shift fork promotes motion knife rest to rotating shuttle side
To movement, connect the plane contact on the steady pin and rotating shuttle on motion knife rest and realize motion knife rest and lower axle synchronous axial system,
Resetting-mechanism is provided with the driving shaft, and drive shaft is connected with power part.
In a kind of above-mentioned thread cutting mechanism, the lower outer shaft sleeve is provided with lower axle protheca, and motion knife rest is set in before lower axle
Set is outer, and one end of shift fork is set on motion knife rest.
In a kind of above-mentioned thread cutting mechanism, motion knife rest hole is provided with the chassis backplane, motion knife rest is arranged on
Move on knife rest hole, the outer wall for moving knife rest is connected with the inwall in motion knife rest hole, one end of shift fork is set on motion knife rest.
In a kind of above-mentioned thread cutting mechanism, the motion knife rest includes tool-post structure one and tool-post structure two, tool-post structure one
Include the main body being set in outside lower axle or lower axle protheca, convex annular edge is provided with one end of main body, tool-post structure two is arranged simultaneously
Outside the main body for being fixed on tool-post structure one, the mounting seat of knife one is provided with tool-post structure two, and tool-post structure two is close to the end face of rotating shuttle
On be provided with steady pin, tool-post structure two and convex annular are formed with the annular groove for installing shift fork between.
In a kind of above-mentioned thread cutting mechanism, the resetting-mechanism is the tail of power part, power part and drive shaft
Portion is connected by joint, drives motion knife rest, clutch to reset by power part.
In a kind of above-mentioned thread cutting mechanism, the resetting-mechanism is back-moving spring, the tail end and power part of drive shaft
Contact connection, catch is provided with tail end, and one end of back-moving spring is held out against on catch, the other end is held out against on chassis backplane,
When power part power disappears, motion knife rest, clutch is driven to reset by back-moving spring.
In a kind of above-mentioned thread cutting mechanism, the knife one includes the installation portion being connected with motion knife rest, in installation portion
Side be provided with blade body, blade body and the L-shaped structure of installation portion are provided with point of a knife in the front end of blade body, after
End is provided with cutting edge.
In a kind of above-mentioned thread cutting mechanism, the knife two is stationary knife or moving knife.
In a kind of above-mentioned thread cutting mechanism, when the motion knife rest is connected with lower axle, motion knife rest is together with lower axle
360 ° of rotations.
Another purpose of the present utility model is to provide a kind of sewing machine, including a kind of above-mentioned thread cutting mechanism.
The advantage that the utility model is protruded compared with prior art is：
The utility model by clutch drive motion knife rest and lower axle synchronous rotary follow rotating shuttle rotate a circle and then
The action of rotation trimming is realized with stationary knife, it is to avoid the dependence in existing structure to trimming cam.Simplify being moved through for trimming
Journey, and the structure of whole cutting facility is simplified, the reliability of trimming function is high.
Brief description of the drawings
Fig. 1 is the schematic diagram that motion knife rest of the present utility model is in released state with rotating shuttle；
Fig. 2 is the schematic diagram that motion knife rest of the present utility model is in connection status with rotating shuttle；
Fig. 3 is schematic diagram of the present utility model；
Fig. 4 is the schematic diagram of knife one of the present utility model；
Fig. 5 is the schematic diagram of the tool-post structure two of motion knife rest of the present utility model；
Fig. 6 is the schematic diagram of the tool-post structure one of motion knife rest of the present utility model；
Fig. 7 is that the utility model motion knife rest is arranged on the motion knife rest hole of chassis backplane and showing that shift fork one end is connected
Meaning sketch；
Fig. 8 is the schematic diagram that shift fork of the present utility model is connected with drive shaft.
In figure：1st, lower axle；2nd, rotating shuttle；3rd, knife rest is moved；4th, knife one；5th, knife two；6th, chassis backplane；7th, drive shaft；8th, dial
Fork；9th, steady pin；10th, plane；11st, lower axle protheca；12nd, back-moving spring；13rd, catch；14th, electromagnet；15th, installation portion；16th, knife
Piece body；17th, point of a knife；18th, cutting edge；19th, bracing wire groove；20th, eedle；21st, tool-post structure one；22nd, tool-post structure two；23rd, main body；24、
Convex annular edge；25th, the mounting seat of knife one.
Embodiment
The utility model is further described with specific embodiment below, referring to Fig. 1-8：
A kind of thread cutting mechanism, including lower axle 1, are provided with rotating shuttle 2 in lower axle 1, and motion knife rest 3 is arranged with outside lower axle 1,
Knife 1 is provided with motion knife rest 3, motion knife rest 3 is connected with clutch, and clutch makes motion by power part driving
Knife rest 3 is connected or separated with lower axle 1.During connection, motion knife rest 3 is rotated together with lower axle 1, and knife 1 realizes that rotation is cut with knife 25
Line is acted；During separation, lower axle 1 is rotated, and motion knife rest 3 is not rotated；Acted without trimming.Wherein knife 25 can be stationary knife,
It can also be moving knife.When knife 25 is stationary knife, it is arranged on by screw on chassis backplane 6, is that moving knife is rotated and fixed by knife 1
Knife occlusion completes trimming action；When knife 25 is as moving knife, on another knife rest, band moving knife 25 is moved by the knife rest
Rotation is engaged completion trimming action with knife 1.When the motion knife rest 3 is connected with lower axle 1, motion knife rest 3 is together with lower axle 1
360 ° of rotations.
Clutch described in the utility model includes the drive being arranged on chassis backplane 6 in the mounting hole of relevant position
Moving axis 7, drive shaft 7 can be in mounting hole to the direction of rotating shuttle 2 or away from the movement of the direction of rotating shuttle 2, and the head of drive shaft 7, which is provided with, dials
Fork 8, one end of shift fork 8 is connected with motion knife rest 3, the afterbody connection power part of drive shaft 7, is set on the motion knife rest 3
There is steady pin 9, and steady pin 9 is set close to motion knife rest 3 endoporus.Fixed pin holes are provided with motion knife rest 3, steady pin
One end is installed in fixed pin holes.The side of motion knife rest 3 is provided with plane 10 on the rotating shuttle 2, shift fork 8 promotes motion
Knife rest 3 is moved to the direction of rotating shuttle 2, the steady pin 9 on motion knife rest 3 is contacted connection with the plane 10 on rotating shuttle 2 and is realized motion
Knife rest 3 and the synchronous axial system of lower axle 1, are provided with resetting-mechanism in drive shaft 7, and drive shaft 7 is connected with power part.
Shift fork 8 is integral type structure with drive shaft 7, or is fixedly connected by modes such as screw, welding.
The utility model is departing from the trimming cam in existing structure, and the action rotated a circle using the main motion of lower axle 1 is complete
Into a trimming process, from initial position, rotate a circle, be eventually returned to initial position, complete a trimming.It can realize
The simplification of motion process, and the part of cutting facility is simplified, more reliably realize sewing machine trimming.
According to actual design situation, lower axle protheca 11 is arranged with outside the lower axle 1, motion knife rest 3 is set in lower axle protheca
Outside 11, correspondingly, one end of shift fork 8 is connected on lower axle protheca 11 or motion knife rest 3.
Specifically, annular groove is provided with motion knife rest 3, one end of shift fork 8 is arranged in the annular groove, shift fork
Motion knife rest 3 is driven to move while 8 movement.
Certainly, motion knife rest 3 can also be made up of two split type parts, include tool-post structure 1 and tool-post structure
2 22, tool-post structure 2 22 is set in outside lower axle 1 or lower axle protheca 11, and tool-post structure 2 22 includes main body 23 and convex annular edge
24, tool-post structure 1 is set in outside the main body 23 of tool-post structure 2 22, and the mounting seat 25 of knife one, knife rest are provided with tool-post structure 1
The convex annular of body 1 and tool-post structure 2 22 forms annular groove along between 24, and one end of shift fork 8 is arranged in the annular groove.
Install and control for convenience tool-post structure 1 with convex annular along the distance between 24, the outer surface of the main body 23 is step
Face.
As another embodiment, motion knife rest 3 can also be directly installed on chassis backplane 6.Specifically, in chassis backplane
Motion knife rest hole is provided with 6, motion knife rest 3 is arranged on motion knife rest hole, moves outer wall and the motion knife rest hole of knife rest 3
Inwall is connected, and one end of shift fork 8 is set on motion knife rest 3 and motion knife rest 3 can be driven to move.
After trimming is completed, motion knife rest 2, clutch are required to reset, due to clutch of the present utility model not
Interfering movement knife rest 2 is around lower axle protheca 5 or rotatable around its axis, and therefore, the resetting-mechanism can select to drive drive shaft 7 to move
Dynamic power part, that is to say, that resetting-mechanism is power part.Power part can be connected with drive shaft 7 by joint,
Motion knife rest 3, clutch is driven to reset when being resetted by power part.
Certainly, resetting-mechanism can also be back-moving spring 12.Now, the tail end of the drive shaft 7 is used with power part
Contact connection.The tail end of drive shaft 7 is provided with catch 13, to facilitate installation, the catch 13 of the present embodiment is from card
Spring, or the pad with screw rod, screw rod are screwed onto on the end face of drive shaft 7.One end of back-moving spring 12 is held out against in catch 13
The upper, other end is held out against on chassis backplane 6, when power part power disappears, driven by back-moving spring 12 move knife rest 3, from
Close reset.
Power part described in the utility model can select electromagnet 14 or cylinder or motor etc..The present embodiment selects electromagnetism
Iron 14.Electromagnet 14 is fixed on chassis backplane 6 by mounting bracket.
The utility model uses rotation trimming, therefore, and traditional moving knife can not be applied to this structure.The knife 1
Include and move the installation portion 15 that be connected of knife rest 3, be provided with blade body 16 in the side of installation portion 15, blade body 16 and
The L-shaped structure of installation portion 15, point of a knife 17 is provided with the front end of blade body 16, and rear end is provided with cutting edge 18.Draw for convenience
Line, bracing wire groove 19 is provided with the front side of cutting edge 18.
The installation portion 15 of the present embodiment includes two open slots, correspondingly, and two are provided with the mounting seat 25 of knife one
Mounting hole, knife 1 is screwed onto in the mounting hole of the mounting seat 25 of knife one by screw and is fixed, and adjusting screw is in open slot
Position, can be with the occlusal position between fine-adjustment cutter 1 and knife 25.
The utility model setting motion knife rest 3 is that motion knife rest 3 is located at anterior station when being combined with lower axle 1, moves knife rest 3
Luck movable knife rack 3 is separated positioned at rear portion station with lower axle 1 after reset.
Another purpose of the present utility model is to provide a kind of sewing machine, including above-mentioned thread cutting mechanism.
Operation principle of the present utility model：
When need not carry out trimming, motion knife rest 3 and clutch are located at rear portion station, fortune in the presence of resetting-mechanism
Steady pin 9 on movable knife rack 3 is not contacted with the plane 10 on rotating shuttle 2, and lower axle 1 rotates under the drive of machine spindle motor,
Motion knife rest 3 does not rotate.
When control system receives trimming order, before rotating shuttle 2 goes to trimming angle, control system is sent out to power part
Signal, power part starts, and drives drive shaft 7 anteriorly to move.
Now, the drive of shift fork 8 motion knife rest 3 is moved to anterior station and then drive campaign knife rest 3 is moved to anterior station,
Now, steady pin 9 is located at the side of the plane 10 of rotating shuttle 2, and steady pin 9 contacts connection with rotating shuttle 2 when rotating shuttle 2 is rotated, now, under
Axle 1 drives rotating shuttle 2, motion knife rest 3 to rotate together, and the knife 1 (i.e. moving knife) on motion knife rest 3 revolves around the center of lower axle 1
Turn, point of a knife 17 passes through the wire loop of upper thread, and bracing wire groove 19 is with upper thread while being moved with bottom line to knife 25, when the moving knife with line
Cutting edge 18 when being engaged with the cutting edge of knife 25, line is cut off, trimming action is completed.
After line is cut off, rotating shuttle 2 is rotated further with motion knife rest 3, and until eedle 20 is stopping the stopping of pin position, knife 1 is (i.e.
Moving knife) stop position is returned to, wait next trimming operation.
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. a kind of thread cutting mechanism, including lower axle (1), are provided with rotating shuttle (2) in lower axle (1), it is characterised in that：In lower axle (1)
It is outer to be arranged with motion knife rest (3), knife one (4) is provided with motion knife rest (3), motion knife rest (3) is connected with clutch, from
Close mechanism makes motion knife rest (3) connect or separate with lower axle (1) by power part driving；During connection, motion knife rest (3) and lower axle
(1) rotate together, knife one (4) realizes rotation trimming action with knife two (5)；During separation, lower axle (1) is rotated, and motion knife rest (3) is no
Rotate；
The clutch includes the drive shaft (7) being arranged on chassis backplane (6) in the mounting hole of relevant position, drive shaft
(7) can be in mounting hole to rotating shuttle (2) direction or away from the movement of rotating shuttle (2) direction, the head of drive shaft (7) is provided with shift fork
(8), one end of shift fork (8) is connected with motion knife rest (3), the afterbody connection power part of drive shaft (7), the motion knife rest
(3) steady pin (9) is provided with, and steady pin (9) is set close to motion knife rest (3) endoporus, the rotating shuttle (2) is close to motion knife
The side of frame (3) is provided with plane (10), and shift fork (8) promotes motion knife rest (3) to be moved to rotating shuttle (2) direction, makes motion knife rest
(3) steady pin (9) on contacts connection with the plane (10) on rotating shuttle (2) and realizes that motion knife rest (3) synchronously turns with lower axle (1)
It is dynamic, resetting-mechanism is provided with drive shaft (7), and drive shaft (7) is connected with power part.
2. a kind of thread cutting mechanism according to claim 1, it is characterised in that：Lower axle protheca is arranged with outside the lower axle (1)
(11), motion knife rest (3) is set in lower axle protheca (11) outside, and one end of shift fork (8) is set on motion knife rest (3).
3. a kind of thread cutting mechanism according to claim 1, it is characterised in that：Motion is provided with the chassis backplane (6)
Knife rest (3) hole, motion knife rest (3) is arranged on motion knife rest (3) hole, outer wall and motion knife rest (3) hole of motion knife rest (3)
Inwall is connected, and one end of shift fork (8) is set on motion knife rest (3).
4. a kind of thread cutting mechanism according to claim any one of 1-3, it is characterised in that：The motion knife rest (3) includes
There are tool-post structure one (21) and tool-post structure two (22), tool-post structure one (21) includes the master being set in outside lower axle (1) or lower axle protheca
Body (23), convex annular is provided with one end of main body (23) along (24), tool-post structure two (22) is arranged and is fixed on tool-post structure one
(21) main body (23) outside, is provided with the mounting seat of knife one (25) on tool-post structure two (22), and tool-post structure two is close to rotating shuttle (2)
Steady pin (9), the ring that tool-post structure two (22) and convex annular are used for installing shift fork (8) along being formed between (24) are provided with end face
Connected in star.
5. a kind of thread cutting mechanism according to claim 1, it is characterised in that：The resetting-mechanism is power part, is moved
Power part is connected with the afterbody of drive shaft (7) by joint, drives motion knife rest (3), clutch to reset by power part.
6. a kind of thread cutting mechanism according to claim 1, it is characterised in that：The resetting-mechanism is back-moving spring (12),
The tail end of drive shaft (7) contacts connection with power part, and tail end is provided with catch (13), and one end of back-moving spring (12) is held out against
On catch (13), the other end hold out against on chassis backplane (6), when power part power disappears, by back-moving spring (12) band
Dynamic motion knife rest (3), clutch reset.
7. a kind of thread cutting mechanism according to claim 1, it is characterised in that：The knife one (4) includes and motion knife rest
(3) installation portion (15) of connection, blade body (16), blade body (16) and installation portion are provided with the side of installation portion (15)
(15) L-shaped structure, point of a knife (17) is provided with the front end of blade body (16), and rear end is provided with cutting edge (18).
8. a kind of thread cutting mechanism according to claim 1, it is characterised in that：The knife two (5) is stationary knife or moving knife.
9. a kind of thread cutting mechanism according to claim 1, it is characterised in that：The motion knife rest (3) is connected with lower axle (1)
When, motion knife rest (3) 360 ° of rotations together with lower axle (1).
10. a kind of sewing machine, it is characterised in that：Including a kind of thread cutting mechanism as described in claim any one of 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088908.1U CN206512417U (en) | 2017-01-20 | 2017-01-20 | A kind of thread cutting mechanism and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088908.1U CN206512417U (en) | 2017-01-20 | 2017-01-20 | A kind of thread cutting mechanism and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206512417U true CN206512417U (en) | 2017-09-22 |
Family
ID=59866622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720088908.1U Active CN206512417U (en) | 2017-01-20 | 2017-01-20 | A kind of thread cutting mechanism and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206512417U (en) |
-
2017
- 2017-01-20 CN CN201720088908.1U patent/CN206512417U/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 |