CN202202121U - Upper thread trimming device - Google Patents
Upper thread trimming device Download PDFInfo
- Publication number
- CN202202121U CN202202121U CN 201120303891 CN201120303891U CN202202121U CN 202202121 U CN202202121 U CN 202202121U CN 201120303891 CN201120303891 CN 201120303891 CN 201120303891 U CN201120303891 U CN 201120303891U CN 202202121 U CN202202121 U CN 202202121U
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- Prior art keywords
- scissors
- upper thread
- assembly
- base plate
- roller
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Abstract
The utility model discloses an upper thread trimming device for a sewing machine, comparing a scissors assembly which can be folded and can shear an upper thread, a feeding mechanism which can feed the scissors assembly to a trimming position from a standby position, a connecting mechanism for driving the scissors assembly to open and close, and a driving mechanism for driving the feeding mechanism and the connecting mechanism to work cooperatively; the feeding mechanism is movably connected with a movable support assembly which comprises a fixing bracket with a first hinge pin, a pin roller with a sliding hole, and a bracket connecting sleeve which is rotatably sheathed outside the pin roller and is provided with a long-strip sliding hole. The first hinge pin penetrates through the sliding hole of the pin roller and the long-strip sliding hole of the bracket connecting sleeve, and the bracket connecting sleeve can rotate around the axial lead of the pin roller or do axial sliding with the pin roller along the first hinge pin. The movable support assembly is convenient for the scissors assembly to move to the trimming position from the standby position, the driving mechanism drives a first guide crank and a second guide crank to move cooperatively by a cam wheel, so as to realize the implementation of the trimming action; the upper thread trimming device has the advantages of simplicity and convenience in control.
Description
Technical field
The utility model relates to a kind of Sewing machines, specifically is used for a kind of upper thread cutting facility on the Sewing machines.
Background technology
Patent of invention title: thread cutting device; The patent No. 01140310.1 discloses a kind of thread cutting device; Comprise through closing up and cut off upper thread and cut closing up the upper thread of fixing the upper thread that is cut off under the state; With cut off bottom line and cut and will be in the upper thread that closes up state and cut and be at least one side driving that the bottom line that closes up state cuts and be the drive unit of open mode closing the bottom line of fixing the bottom line that is cut off under the state of disturbing through closing up.Upper thread cuts off the upper thread cut-out portion of action to the surface thread cut-off device of this disclosure of the Invention and the upper thread cut-out drive division of driving upper thread cut-out portion is formed by carrying out.
Upper thread cut-out portion have can free folding upper thread cut and support support arm that upper thread cuts and be fixed on support arm the back shaft of its leading section.Be provided with towards the upper thread of compress cantilever front end at the front end of support arm and cut.
The upper thread clipper has the dead knife that is fixed on the support arm front end and be but that the center can rotate freely the moving knife of setting and be fixed on the pressing plate on the dead knife with respect to dead knife with the pin.In addition, but on moving knife, be provided with flange contact site from face protrusion.
Upper thread is cut through being rotated counterclockwise and forwards moving of back shaft, and realizes that upper thread cuts from position of readiness moving to off-position.When upper thread is cut when position of readiness moves to off-position, but the flange contact site of moving knife contact with closing up plate, by closing up plate to the pressurization of flange contact site, but moving knife rotate with respect to dead knife, upper thread is cut and is closed up thus and cut off upper thread.
The disclosed upper thread of above-mentioned patent cut type of drive through back shaft rotation have wayward, upper thread cut assembly from position of readiness can't flexible motion to the shortcoming of trimming position; And driving mechanism can only drive upper thread and cut and carry out trimming, can't realize the interlock of other functions.
Summary of the invention
The utility model technical problem to be solved is to above-mentioned prior art present situation, and a kind of upper thread cutting facility is provided, and adopts movable supporting assembly flexibly, is convenient to the scissors assembly and moves to the trimming position from position of readiness.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of upper thread cutting facility; Comprise the scissors assembly that can close up and cut off upper thread, with the scissors assembly from position of readiness deliver to the trimming position feed mechanism, drive the bindiny mechanism of scissors assembly folding and the driving mechanism that drives feed mechanism and bindiny mechanism's collaborative work.Feed mechanism is connected with the movable supporting assembly.The movable supporting assembly comprises the fixed support that is provided with first bearing pin, the roller that is shaped on slide opening, and turning set to be located at roller outer and be shaped on the support adapter sleeve of rectangular slide opening.First bearing pin is arranged in the rectangular slide opening of slide opening and support adapter sleeve of roller, and the support adapter sleeve can rotate or be in axial sliding along first bearing pin with roller around the roller axial line.
For optimizing technique scheme, the utility model also comprises following improved technical scheme.
In order to make the movable supporting assembly can stably support feed mechanism more flexibly, be provided with the leading truck of tape guide groove in a support bracket fastened side, roller one end rotates and is provided with directive wheel, and directive wheel matches with the gathering sill that is arranged on fixed support one side.
The utility model also provides a kind of improved driving mechanism, has advantage simple in structure, as to be convenient to carry out the trimming action.Driving mechanism comprises stepper motor, motor fixing frame, the cam that is connected with machine shaft.Cam is shaped on first guide chute and second guide chute.Rotate on the motor fixing frame and be provided with the first guiding crank that drives bindiny mechanism's scissors assembly, on the first guiding crank, be fixed with the first guiding slide bar that matches with first guide chute.On motor fixing frame, rotate and be provided with the second guiding crank, on the second guiding crank, be fixed with the second guiding slide bar that matches with second guide chute, the second guiding crank is rotatably connected to the transmission arm with feed mechanism and bindiny mechanism's interlock.Driving mechanism is realized the execution of trimming action through the motion of the collaborative first guiding crank of cam and the second guiding crank, has and controls advantage simply and easily.
Further improve as technique scheme, feed mechanism comprises that front end connects the scissors bracing frame of scissors assembly, the feeding base plate that is fixedly connected with the scissors bracing frame.On scissors bracing frame or feeding base plate, be provided with and drive the scissors assembly moves to the trimming position from position of readiness extension spring.The feeding base plate rear end is connected with first back-moving spring; One side of feeding base plate is shaped on and is used to fit into to control lever and switches position of readiness and the hypotenuse groove of trimming position; The opposite side of feeding base plate is shaped on the sidewall of oblique rectangular groove, and oblique rectangular groove matches with universal driving shaft on the transmission arm.
Slide on the above-mentioned feeding base plate and be provided with the advance and retreat guide plate.Above hypotenuse groove correspondence, locate, the advance and retreat guide plate is shaped on and is used to fit into the straight flange groove to control lever.Through cooperating of advance and retreat guide plate and feeding base plate, the switch of realization feed mechanism movement position.
Above-mentioned feeding base plate is provided with fixed leg, and the advance and retreat guide plate is shaped on the advance and retreat chute.The fixed leg of feeding base plate is positioned at the advance and retreat chute, and the advance and retreat guide plate can slide with respect to the feeding base plate.Between fixed leg and advance and retreat guide plate, be provided with return spring.
Above-mentioned scissors supporting framing front end is shaped on and is used to fit into the feeding guide chute to guide post.The scissors bracing frame is under feed mechanism drives, and the front end guide post slides, and the scissors assembly is delivered to the trimming position from position of readiness.
Above-mentioned bindiny mechanism comprises the scissors actuating arm, and the scissors actuating arm rotates with the movable end of the first guiding crank and is connected, and between scissors actuating arm and transmission arm, return spring is set.Be slidingly matched between scissors actuating arm and the scissors bracing frame, the front end of scissors actuating arm connects the driver part of scissors assembly.
Above-mentioned scissors assembly comprises the cutter stator that is fixed on the scissors supporting framing front end, the cutting blade that is rotatably assorted with cutter stator, and the drive plate that cuts across that drives the cutting blade folding.Scissors actuating arm front end is fixed with drive post, and drive post is passed the chute that cuts across of scissors supporting framing front end, and with cut across drive plate and be rotationally connected.
Compared with prior art; The movable supporting assembly of the utility model can realize that feed mechanism is along the axially-movable of first bearing pin with around the rotation of roller certain angle; Driving mechanism comprises stepper motor, motor fixing frame, the cam that is connected with machine shaft; Cam is shaped on first guide chute and second guide chute; On motor fixing frame, rotate and be provided with the first guiding crank that drives bindiny mechanism's scissors assembly, an end of the first guiding crank rotates through pin and is arranged on the motor fixing frame, is fixed with the first guiding slide bar that matches with first guide chute at the middle part of the first guiding crank; On motor fixing frame, rotate and be provided with the second guiding crank, an end of the second guiding crank rotates through pin and is arranged on the motor fixing frame, is fixed with the second guiding slide bar that matches with second guide chute at the middle part of the second guiding crank.The movable end of the second guiding crank is rotatably connected to the transmission arm that links with feed mechanism and bindiny mechanism, is provided with and drives the connector of slow line hook at the front end of transmission arm.During cam rotation, the second guiding crank drives the transmission arm motion earlier, makes the feed mechanism action, and the scissors bracing frame is delivered to the trimming position at the pulling force of extension spring with the scissors assembly.The first guiding crank impels the scissors actuating arm to slide with respect to the scissors bracing frame then, and the front end of scissors actuating arm just drives the scissors assembly line is cut off.Front end at transmission arm also can be provided with the connector that drives slow line hook, and driving mechanism has and controls advantage simply and easily through the motion of the collaborative first guiding crank of cam and the second guiding crank.
Description of drawings
Fig. 1 is the perspective view of the utility model embodiment.
Fig. 2 is the perspective view at another visual angle of the utility model embodiment.
Fig. 3 is the perspective view at another visual angle of the utility model embodiment.
Fig. 4 is the assembling decomposing schematic representation of Fig. 1.
The specific embodiment
Embodiment to the utility model describes in further detail below in conjunction with accompanying drawing.
Fig. 1 is extremely shown in Figure 4 to be the structural representation of the utility model.
Reference numeral wherein is: feed mechanism 1; Scissors bracing frame 11; Chute 11a; Cut across chute 11b; Feeding base plate 12; Hypotenuse groove 12a; Sidewall 12b; Oblique rectangular groove 12c; Fixed leg 12d; Extension spring 13; First back-moving spring 14; Advance and retreat guide plate 15; Straight flange groove 15a; Advance and retreat chute 15b; Return spring 16; Bindiny mechanism 2; Scissors actuating arm 21; Drive post 21a; Driving mechanism 3; Stepper motor 31; Motor fixing frame 32; Cam 33; The first guide chute 33a; The second guide chute 33b; The first guiding crank 34; The first guiding slide bar 34a; The second guiding crank 35; The second guiding slide bar 35a; Transmission arm 36; Universal driving shaft 37; Return spring 38; Movable supporting assembly 4; First bearing pin 41; Fixed support 42; Roller 43; Slide opening 43a; Support adapter sleeve 44; Rectangular slide opening 44a; Directive wheel 45; Leading truck 46; Gathering sill 46a; Cut across drive plate 5; Feeding guide post 6; Feeding control lever 7; Connector 8.
As shown in Figure 1; A kind of upper thread cutting facility of the utility model; Comprise the scissors assembly that can close up and cut off upper thread, the scissors assembly delivered to the feed mechanism 1 of trimming position from position of readiness; Drive the bindiny mechanism 2 of scissors assembly folding, and the driving mechanism 3 that drives feed mechanism 1 and bindiny mechanism's 2 collaborative works.
The feed mechanism 1 of the utility model is movably arranged on the movable supporting assembly 4, and can drive the scissors assembly and move to the trimming position from position of readiness.Movable supporting assembly 4 comprises the fixed support 42 that is provided with first bearing pin 41, is shaped on the roller 43 of slide opening 43a, and turning set is located at outside the roller 43 and is shaped on the support adapter sleeve 44 of rectangular slide opening 44a, and support adapter sleeve 44 can rotate around roller 43.
First bearing pin 41 is arranged in the rectangular slide opening 44a of slide opening 43a and support adapter sleeve 44 of roller 43; Support adapter sleeve 44 is fixedly connected with feed mechanism 1, and can be in axial sliding or under the restriction of rectangular slide opening 44a, do the rotation of certain angle around roller 43 axial lines with roller 43.
Be fixed with leading truck 46 in fixed support 42 1 sides, leading truck 46 is shaped on gathering sill 46a.Roller 43 1 ends rotate and are provided with directive wheel 45.Directive wheel 45 is arranged in the gathering sill 46a of leading truck 46, and during along 41 axially-movables of first bearing pin, directive wheel 45 can slide along gathering sill 46a at support adapter sleeve 44.
When stepper motor 31 rotated, the first guide chute 33a of cam 33 and the second guide chute 33b drive the first guiding slide bar 34a respectively and the second guiding slide bar 35a moves in chute, thereby make the first guiding crank 34 and the 35 collaborative swings of the second guiding crank.
On feeding base plate 12, slide to be provided with and be used to control the advance and retreat guide plate 15 that feed mechanism 1 is got back to position of readiness.Above hypotenuse groove 12a correspondence, locate, advance and retreat guide plate 15 is shaped on and is used to fit into the straight flange groove 15a to control lever 7.
On feeding base plate 12, be provided with fixed leg 12d, advance and retreat guide plate 15 is shaped on advance and retreat chute 15b.The fixed leg 12d of feeding base plate 12 is positioned at advance and retreat chute 15b, and advance and retreat guide plate 15 can slide with respect to feeding base plate 12.Between fixed leg 12d and advance and retreat guide plate 15, be provided with return spring 16.
When position of readiness; Hypotenuse groove 12a and straight flange groove 15a are overlapping; The peripheral sidewall of straight flange groove 15a just in time blocks the hypotenuse of hypotenuse groove 12a, is fixed on feeding control lever 7 on the head because of the sidewall against straight flange groove 15a periphery, and is positioned at outside the straight flange groove 15a.When needing trimming; Stepper motor 31 driving cams 33 rotate; The second guiding crank 35 drives transmission arm 36 motions; Universal driving shaft 37 drives feeding base plate 12 and travels forward with advance and retreat guide plate 15, and feeding control lever 7 is fallen in hypotenuse groove 12a and the straight flange groove 15a, and scissors bracing frame 11 is delivered to the trimming position at the pulling force of extension spring 13 with the scissors assembly.During return, along with the rotation of cam 33, under the effect of first back-moving spring 14, feeding base plate 12 is moved backward simultaneously, and advance and retreat guide plate 15 is motionless under 7 effects of feeding control lever, staggers mutually with feeding base plate 12.Feeding control lever 7 slowly skids off along the hypotenuse of hypotenuse groove 12a; When feeding control lever 7 skids off hypotenuse groove 12a fully; The playback under return spring 16 effects of advance and retreat guide plate 15, the peripheral sidewall of straight flange groove 15a blocks control lever 7, prevents that feeding control lever 7 from falling in the hypotenuse groove 12a.
Bindiny mechanism 2 comprises scissors actuating arm 21, and scissors actuating arm 21 rotates with the movable end of the first guiding crank 34 and is connected, and between scissors actuating arm 21 and transmission arm 36, return spring 38 is set.Be slidingly matched between scissors actuating arm 21 and the scissors bracing frame 11, the front end of scissors actuating arm 21 connects the driver part of scissors assembly.When cam 33 rotated, the second guiding crank 35 drove transmission arm 36 motions earlier, makes scissors bracing frame 11 at the pulling force of extension spring 13 the scissors assembly delivered to the trimming position.The first guiding crank 34 that matches with cam 33 then impels scissors actuating arm 21 to slide with respect to scissors bracing frame 11, and the front end of scissors actuating arm 21 just drives the scissors assembly line is cut off.
The scissors assembly comprises the cutter stator that is fixed on scissors bracing frame 11 front ends, the cutting blade that is rotatably assorted with cutter stator, and drive the cutting blade folding cut across drive plate 5.Scissors actuating arm 21 front ends are fixed with drive post 21a, and drive post is passed the chute 11a of scissors bracing frame 11 front ends, and with cut across drive plate 5 and be rotationally connected.When scissors actuating arm 21 slides with respect to scissors bracing frame 11, cut across drive plate 5 and rotate, drive cutting blade and rotate, closed with cutter stator, line is cut off.
The most preferred embodiment of the utility model is illustrated, and various variations of being made by those of ordinary skills or remodeling can not break away from the scope of the utility model.
Claims (9)
1. upper thread cutting facility; Comprise the scissors assembly that can close up and cut off upper thread, the scissors assembly delivered to the feed mechanism (1) of trimming position from position of readiness; Drive the bindiny mechanism (2) of scissors assembly folding, and the driving mechanism (3) that drives feed mechanism (1) and bindiny mechanism (2) collaborative work; It is characterized in that: described feed mechanism (1) is connected with movable supporting assembly (4); Described movable supporting assembly (4) comprises the fixed support (42) that is provided with first bearing pin (41), the roller (43) that is shaped on slide opening (43a), and turning set to be located at roller (43) outer and be shaped on the support adapter sleeve (44) of rectangular slide opening (44a); Described first bearing pin (41) is arranged in the rectangular slide opening (44a) of slide opening (43a) and support adapter sleeve (44) of roller (43), and described support adapter sleeve (44) can rotate or endwisely slip along first bearing pin (41) with roller (43) around roller (43) axial line.
2. a kind of upper thread cutting facility according to claim 1 is characterized in that: described roller (43) one ends rotate and are provided with directive wheel (45), and described directive wheel (45) matches with the gathering sill that is arranged on fixed support (42) one sides (46a).
3. a kind of upper thread cutting facility according to claim 1 and 2 is characterized in that: described driving mechanism (3) comprises stepper motor (31), motor fixing frame (32), the cam (33) that is connected with machine shaft; Described cam (33) is shaped on first guide chute (33a) and second guide chute (33b); Described motor fixing frame (32) is gone up to rotate and is provided with the first guiding crank (34) that drives bindiny mechanism (2) scissors assembly, is fixed with the first guiding slide bar (34a) that matches with first guide chute (33a) on the said first guiding crank (34); Go up rotation at described motor fixing frame (32) and be provided with the second guiding crank (35); Be fixed with the second guiding slide bar (35a) that matches with second guide chute (33b) on the said second guiding crank (35), the second guiding crank (35) is rotatably connected to the transmission arm (36) with feed mechanism (1) and bindiny mechanism (2) interlock.
4. a kind of upper thread cutting facility according to claim 3 is characterized in that: described feed mechanism (1) comprises that front end connects the scissors bracing frame (11) of scissors assembly, the feeding base plate (12) that is fixedly connected with scissors bracing frame (11); Described scissors bracing frame (11) or feeding base plate (12) are provided with and drive the scissors assembly moves to the trimming position from position of readiness extension spring (13); Described feeding base plate (12) rear end is connected with first back-moving spring (14); One side of described feeding base plate (12) is shaped on and is used to fit into to control lever (7) and switches position of readiness and the hypotenuse groove of trimming position (12a); The opposite side of described feeding base plate (12) is shaped on the sidewall (12b) of oblique rectangular groove (12c), and described oblique rectangular groove (12c) matches with universal driving shaft (37) on the transmission arm (36).
5. a kind of upper thread cutting facility according to claim 4; It is characterized in that: described feeding base plate (12) is gone up to slide and is provided with advance and retreat guide plate (15); The place, top that said hypotenuse groove (12a) is corresponding, advance and retreat guide plates (15) are shaped on and are used to fit into the straight flange groove (15a) to control lever (7).
6. a kind of upper thread cutting facility according to claim 5; It is characterized in that: described feeding base plate (12) is provided with fixed leg (12d); Described advance and retreat guide plate (15) is shaped on advance and retreat chute (15b); Said fixed leg (12d) is positioned at advance and retreat chute (15b), between fixed leg (12d) and advance and retreat guide plates (15), is provided with return spring (16).
7. a kind of upper thread cutting facility according to claim 4 is characterized in that: described scissors bracing frame (11) front end is shaped on and is used to fit into the feeding guide chute (11a) to guide post (6).
8. a kind of upper thread cutting facility according to claim 4; It is characterized in that: described bindiny mechanism (2) comprises scissors actuating arm (21); Scissors actuating arm (21) rotates with the movable end of the first guiding crank (34) and is connected, and between described scissors actuating arm (21) and transmission arm (36), return spring (38) is set; Be slidingly matched between described scissors actuating arm (21) and the scissors bracing frame (11), the front end of scissors actuating arm (21) connects the driver part of scissors assembly.
9. a kind of upper thread cutting facility according to claim 8 is characterized in that: described scissors assembly comprises the cutter stator that is fixed on scissors bracing frame (11) front end, the cutting blade that is rotatably assorted with cutter stator, and drive the cutting blade folding cut across drive plate (5); Described scissors actuating arm (21) front end is fixed with drive post (21a), and what described drive post (21a) was passed scissors bracing frame (11) front end cuts across chute (11b), and with cut across drive plate (5) and be rotationally connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120303891 CN202202121U (en) | 2011-08-20 | 2011-08-20 | Upper thread trimming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120303891 CN202202121U (en) | 2011-08-20 | 2011-08-20 | Upper thread trimming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202202121U true CN202202121U (en) | 2012-04-25 |
Family
ID=45966253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120303891 Expired - Fee Related CN202202121U (en) | 2011-08-20 | 2011-08-20 | Upper thread trimming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202202121U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI550157B (en) * | 2014-04-03 | 2016-09-21 | Chee Siang Ind Co Ltd | Sewing machine on the thread trimming mechanism |
| CN107034598A (en) * | 2016-03-17 | 2017-08-11 | 标准缝纫机菀坪机械有限公司 | A kind of crosspointer cylindrical sewing machine automatic wire cutting mechanism |
-
2011
- 2011-08-20 CN CN 201120303891 patent/CN202202121U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI550157B (en) * | 2014-04-03 | 2016-09-21 | Chee Siang Ind Co Ltd | Sewing machine on the thread trimming mechanism |
| CN107034598A (en) * | 2016-03-17 | 2017-08-11 | 标准缝纫机菀坪机械有限公司 | A kind of crosspointer cylindrical sewing machine automatic wire cutting mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161012 Address after: 315100 Zhejiang city of Ningbo province Yinzhou District Jingu Road No. 219 Patentee after: NINGBO SUPREME ELECTRONIC MACHINERY CO., LTD. Address before: 315100 No. 528 Jin Yuan Road, Yinzhou investment center, Ningbo, Zhejiang, Yinzhou District Patentee before: Ningbo Supreme Electronic Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20200820 |