CN212199616U - Automatic thread trimming device - Google Patents
Automatic thread trimming device Download PDFInfo
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- CN212199616U CN212199616U CN201921880297.XU CN201921880297U CN212199616U CN 212199616 U CN212199616 U CN 212199616U CN 201921880297 U CN201921880297 U CN 201921880297U CN 212199616 U CN212199616 U CN 212199616U
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Abstract
The utility model discloses an automatic thread trimming device, including setting up thread trimming mechanism, the setting in sewing machine aircraft nose below the last thread pressing mechanism of sewing machine aircraft nose and thread loosening mechanism and electrical system. The utility model adopts the mode that the electric control system is respectively electrically connected with the thread trimming cylinder, the thread pressing cylinder and the thread loosening cylinder, so that the thread pressing group presses down the sewing thread before trimming after finishing sewing, thereby realizing the function of reserving thread length, and when the sewing is performed again, the thread pressing group is lifted up to ensure that the sewing is performed again with enough thread length; when sewing is finished and the thread is loosened before the thread is pressed, the thread clamping piece of the thread clamping group is separated by the action of the thread loosening group, so that the required length of the thread is taken out when the thread is pressed, the problem that the thread end is not clamped by the thread clamping assembly easily due to insufficient length of the sewing thread in the thread shearing process is avoided, and the problem that the thread is broken due to overlarge tension caused by insufficient length of the thread during secondary sewing is also avoided.
Description
Technical Field
The utility model relates to a sewing machine technical field especially relates to an automatic thread trimming device.
Background
A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. With the increasing development of the sewing machine technology, in order to improve the production efficiency of factories, reduce the workload of workers and ensure the continuity of the working procedures, the sewing machine is developed to a multi-needle sewing machine, the appearance design of the multi-needle sewing machine is unique, the sewing performance is stable, and the production efficiency of the workers is high.
However, the thread cutting operation of the existing sewing machine is not smooth, the problems of unstable thread cutting and thread clamping are easily caused, and faults often occur.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automatic trimming device that trimming presss from both sides line effectual to prior art's defect with not enough.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides an automatic thread trimming device, including setting up thread trimming mechanism, the setting in sewing machine aircraft nose below thread trimmer devices and electrical system of sewing machine on the aircraft nose, thread trimmer devices is including drive assembly, link assembly and the cutter unit that connects gradually, drive assembly is including fixed plate, the fixed setting that sets up on the sewing machine casing cut line cylinder frame and setting on the fixed plate are in cut line cylinder on the cut line cylinder frame, link assembly is including the pull block, pull rod and the poker rod that connect gradually, be provided with pulling block guiding axle on the cylinder frame, the middle part slidable of pulling block sets up on the pulling block guiding axle, just the one end of pulling block with the cut line cylinder is connected, the other end of pulling block with the pull rod is connected, the cutter unit is including fixed the blade holder on the sewing machine casing, The wire clamping device comprises a slide block, a movable knife, a fixed knife and a wire clamping component, wherein the slide block and the movable knife are arranged on a knife holder and are sequentially connected, the fixed knife and the wire clamping component are arranged on the knife holder, a chute for the slide block to slide is arranged on the knife holder, one end of a poke rod is connected with a pull rod, the middle part of the poke rod is hinged with the knife holder, the other end of the poke block is hinged with the slide block, the fixed knife is positioned above the movable knife, one end of the wire clamping component is fixedly connected with the knife holder, and the other end of the wire clamping component is in contact connection with the lower surface of; and the electric control system is electrically connected with the thread trimming cylinder and the cylinders in the thread pressing mechanism and the thread releasing mechanism respectively.
Preferably, the thread pressing mechanism comprises a thread pressing cylinder frame fixedly arranged on the sewing machine head, and a thread pressing cylinder and a thread passing device which are arranged on the thread pressing cylinder frame from top to bottom, wherein a thread pressing plate which moves up and down in the thread passing device is arranged at the movable end of the thread pressing cylinder.
Preferably, the thread releasing mechanism comprises a thread releasing cylinder frame fixedly arranged on the sewing machine head, a thread releasing cylinder arranged on the thread releasing cylinder frame and a thread releasing top plate connected with the movable end of the thread releasing cylinder, and a thread clamping device fixed on the sewing machine head is arranged in the moving stroke of the thread releasing top plate; the electric control system is electrically connected with the thread trimming cylinder, the thread pressing cylinder and the thread releasing cylinder respectively; after sewing and before thread trimming, the electric control system controls the thread pressing cylinder to press down the sewing thread, and the thread pressing cylinder is lifted when the sewing is started again; after sewing and before pressing the thread, the thread releasing cylinder extends out to separate the thread clamping sheets of the thread clamping device so as to take out the thread by the required length when the thread is pressed
Preferably, a slide seat pressing block is further arranged on the tool apron and located above the sliding groove, the sliding groove is arranged on the tool apron or one part of the sliding groove is arranged on the tool apron, and the other part of the sliding groove is arranged on the slide seat pressing block.
Preferably, the number of the fixed knives is 1, the number of the movable knives is at least 1, and the thread clamping assembly is arranged below each movable knife.
Preferably, the thread clamping assembly comprises a thread clamping piece and a thread clamping spring piece, the thread clamping piece is located above the thread clamping spring piece, the thread clamping piece is in direct contact with the lower surface of the movable knife, and the end part of the thread clamping spring piece is in direct contact with the lower surface of the thread clamping piece.
The utility model discloses following beneficial effect has been gained for prior art:
1. the utility model provides an automatic thread trimming device which adopts the mode that the electric control system is respectively electrically connected with the thread trimming cylinder, the thread pressing cylinder and the thread loosening cylinder, so that the thread pressing group presses down the sewing thread before trimming after finishing sewing, thereby realizing the function of reserving thread length, and when the sewing is performed again, the thread pressing group is lifted up to ensure that the thread length is enough when the sewing is performed again; when sewing is finished and the thread is loosened before the thread is pressed, the thread clamping piece of the thread clamping group is separated by the action of the thread loosening group, so that the required length of the thread is taken out when the thread is pressed, the problem that the thread end is not clamped by the thread clamping assembly easily due to insufficient length of the sewing thread in the thread shearing process is avoided, and the problem that the thread is broken due to overlarge tension caused by insufficient length of the thread during secondary sewing is also avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view (a) of the overall structure of the automatic thread trimming device of the present invention;
fig. 2 is a schematic view (ii) of the overall structure of the automatic thread trimming device of the present invention;
FIG. 3 is a schematic view of the overall construction of the thread trimming mechanism of FIGS. 1 and 2;
FIG. 4 is a schematic view of the internal structure of FIG. 3;
FIG. 5 is a schematic view (one) of the structure of the knife assembly (with the stationary knife removed) of FIG. 3;
FIG. 6 is a schematic structural diagram (II) of the cutter assembly (without the slide pressing block) in FIG. 5;
FIG. 7 is a schematic view (III) of the construction of the knife assembly of FIG. 6 (with the slider and moveable knife removed);
FIG. 8 is a schematic view of the overall structure of the crimping mechanism of FIGS. 1 and 2;
FIG. 9 is a schematic view of the overall structure of the thread releasing mechanism of FIGS. 1 and 2;
wherein, 1-trimming mechanism, 2-stitching mechanism, 3-loosing mechanism, 4-fixing plate, 5-trimming cylinder frame, 6-trimming cylinder, 7-pulling block, 8-pulling rod, 9-poking rod, 10-pulling block guide shaft, 11-knife holder, 12-sliding block, 13-moving knife, 14-fixing knife, 15-clipping component, 16-sliding chute, 17-clipping cylinder frame, 18-clipping cylinder, 19-threading device, 20-clipping plate, 21-loosing cylinder frame, 22-loosing cylinder, 23-loosing top plate, 24-clipping device, 25-sewing machine head, 26-sewing machine shell, 27-clipping piece, 28-clipping spring piece, 29-needle plate, 30-cover plate, 31-slide press block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
An object of the utility model is to provide an automatic trimming device that trimming presss from both sides line effectual to prior art's defect with not enough.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1-9, the utility model provides an automatic thread trimming device, which comprises a thread trimming mechanism 1 arranged below a sewing machine head 25, a thread pressing mechanism 2 and a thread loosening mechanism 3 arranged on the sewing machine head 25, and an electric control system, wherein the thread trimming mechanism 1 comprises a driving component, a connecting rod component and a cutter component which are connected in sequence, the driving component comprises a fixed plate 4 fixedly arranged on a sewing machine shell 26, a thread trimming cylinder frame 5 fixedly arranged on the fixed plate 4, and a thread trimming cylinder 6 arranged on the thread trimming cylinder frame 5, the connecting rod component comprises a pulling block 7, a pull rod 8 and a poking rod 9 which are connected in sequence, a pulling block guide shaft 10 is arranged on the cylinder frame, the middle part of the pulling block 7 is slidably arranged on the pulling block guide shaft 10, one end of the pulling block 7 is connected with the thread trimming cylinder 6, the other end of the pulling block 7 is connected with the pull rod 8, the cutter assembly comprises a cutter holder 11 fixedly arranged on a sewing machine shell 26, a sliding block 12 and a movable cutter 13 which are arranged on the cutter holder 11 and are sequentially connected, and a fixed cutter 14 and a thread clamping assembly 15 which are arranged on the cutter holder 11, wherein the cutter holder 11 is provided with a sliding chute 16 for the sliding of the sliding block 12, one end of a poke rod 9 is connected with a pull rod 8, the middle part of the poke rod 9 is hinged with the cutter holder 11, the other end of the poke block is hinged with the sliding block 12, the fixed cutter 14 is positioned above the movable cutter 13, one end of the thread clamping assembly 15 is fixedly connected with the cutter holder 11, and the other end of the thread clamping assembly 15 is in contact connection with the lower surface; and the electric control system is electrically connected with the thread trimming cylinder and the cylinders in the thread pressing mechanism and the thread releasing mechanism respectively.
Wherein, the movable knife 13 is arranged below the needle plate 29, and the knife seat is arranged below the cover plate 30; the wire pressing cylinder, the wire pressing mechanism and the wire releasing mechanism are all cylinders in the prior art, and the specific type of the wire pressing cylinder and the wire pressing mechanism and the wire releasing mechanism can be selected according to specific working conditions (such as different applied pressures for different wires); the electric control system is also a control device in the prior art, and the structure does not protect the specific electric control system composition as long as the corresponding control function can be realized; the utility model adopts the mode that the electric control system is respectively electrically connected with the thread trimming cylinder, the thread pressing cylinder and the thread loosening cylinder, so that the thread pressing group presses down the sewing thread before trimming after finishing sewing, thereby realizing the function of reserving thread length, and when the sewing is performed again, the thread pressing group is lifted up to ensure that the sewing is performed again with enough thread length; when sewing is finished and the thread is loosened before the thread is pressed, the thread clamping piece of the thread clamping group is separated by the action of the thread loosening group, so that the required length of the thread is taken out when the thread is pressed, the problem that the thread end is not clamped by the thread clamping assembly easily due to insufficient length of the sewing thread in the thread shearing process is avoided, and the problem that the thread is broken due to overlarge tension caused by insufficient length of the thread during secondary sewing is also avoided.
The utility model discloses well line ball mechanism 2 is including fixed line ball cylinder frame 17 that sets up on sewing machine aircraft nose 25 and from top to bottom set up line ball cylinder 18 and the line cross 19 on line ball cylinder frame 17, and line ball cylinder 18's expansion end is provided with the line ball board 20 that reciprocates in line cross 19.
The middle thread releasing mechanism 3 of the utility model comprises a thread releasing cylinder frame 21 fixedly arranged on a sewing machine head 25, a thread releasing cylinder 22 arranged on the thread releasing cylinder frame 21 and a thread releasing top plate 23 connected with the movable end of the thread releasing cylinder 22, wherein a thread clamping device 24 fixed on the sewing machine head 25 is arranged in the moving stroke of the thread releasing top plate 23; the electric control system is respectively electrically connected with the thread trimming cylinder 6, the thread pressing cylinder 18 and the thread loosening cylinder 22; after sewing and before trimming, the electric control system controls the thread pressing cylinder 18 to press down the sewing thread, and the thread pressing cylinder 18 is lifted when the sewing is started again; after sewing and before pressing the thread, the thread releasing cylinder 22 extends out to separate the thread clamping sheets 27 of the thread clamping device 24 so as to draw the thread out by a required length when pressing the thread;
in order to improve the sliding stability of the slider 12, the utility model discloses still be provided with the slide briquetting 31 on the well blade holder 11, the slide briquetting 31 is located the top of spout 16, and spout 16 sets up on the blade holder 11 or 16 partly settings of spout are on the blade holder 11, and another part sets up on the slide briquetting 31.
The utility model discloses well fixed sword 14's quantity is 1, and the quantity that moves sword 13 is 1 at least, preferably 2, and every moves the below of sword 13 and all is provided with wire clamping component 15.
The utility model discloses well trapping assembly 15 includes trapping sheet 27 and trapping sheet spring 28, and trapping sheet 27 is located trapping sheet spring 28's top, trapping sheet 27 with move the lower surface direct contact of sword 13, trapping sheet spring 28's tip and trapping sheet spring 27's lower surface direct contact.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. An automatic thread trimming device is characterized by comprising a thread trimming mechanism arranged below a sewing machine head, a thread pressing mechanism, a thread loosening mechanism and an electric control system, wherein the thread trimming mechanism is arranged on the sewing machine head, the thread pressing mechanism and the thread loosening mechanism are arranged on the sewing machine head, the thread trimming mechanism comprises a driving assembly, a connecting rod assembly and a cutter assembly which are sequentially connected, the driving assembly comprises a fixing plate fixedly arranged on a sewing machine shell, a thread trimming air cylinder frame fixedly arranged on the fixing plate and a thread trimming air cylinder arranged on the thread trimming air cylinder frame, the connecting rod assembly comprises a pulling block, a pulling rod and a poking rod which are sequentially connected, a pulling block guide shaft is arranged on the air cylinder frame, the middle part of the pulling block is slidably arranged on the pulling block guide shaft, one end of the pulling block is connected with the thread trimming air cylinder, the other end of the pulling block is connected with the pulling rod, the cutter assembly comprises a cutter seat fixedly arranged on the sewing machine shell, The wire clamping device comprises a slide block, a movable knife, a fixed knife and a wire clamping component, wherein the slide block and the movable knife are arranged on a knife holder and are sequentially connected, the fixed knife and the wire clamping component are arranged on the knife holder, a chute for the slide block to slide is arranged on the knife holder, one end of a poke rod is connected with a pull rod, the middle part of the poke rod is hinged with the knife holder, the other end of the poke rod is hinged with the slide block, the fixed knife is positioned above the movable knife, one end of the wire clamping component is fixedly connected with the knife holder, and the other end of the wire clamping component is in contact connection with the lower surface; and the electric control system is electrically connected with the thread trimming cylinder and the cylinders in the thread pressing mechanism and the thread releasing mechanism respectively.
2. The automatic thread trimming device of claim 1, wherein the thread pressing mechanism comprises a thread pressing cylinder frame fixedly arranged on a sewing machine head, and a thread pressing cylinder and a thread passing device which are arranged on the thread pressing cylinder frame from top to bottom, and a thread pressing plate which moves up and down in the thread passing device is arranged at the movable end of the thread pressing cylinder.
3. The automatic thread trimming device according to claim 2, wherein the thread releasing mechanism comprises a thread releasing cylinder frame fixedly arranged on the sewing machine head, a thread releasing cylinder arranged on the thread releasing cylinder frame and a thread releasing top plate connected with the movable end of the thread releasing cylinder, and a thread clamping device fixed on the sewing machine head is arranged in the moving stroke of the thread releasing top plate; the electric control system is electrically connected with the thread trimming cylinder, the thread pressing cylinder and the thread releasing cylinder respectively; after sewing and before thread trimming, the electric control system controls the thread pressing cylinder to press down the sewing thread, and the thread pressing cylinder is lifted when the sewing is started again; after sewing and before pressing the thread, the thread loosening cylinder extends out to separate the thread clamping sheets of the thread clamping device so as to take the thread out by a required length when the thread is pressed.
4. The automatic thread trimming device according to claim 1, wherein the tool post is further provided with a slide pressing block, the slide pressing block is located above the sliding groove, the sliding groove is arranged on the tool post or a part of the sliding groove is arranged on the tool post and the other part of the sliding groove is arranged on the slide pressing block.
5. The automatic thread trimming device according to claim 1, wherein the number of the fixed knives is 1, the number of the movable knives is at least 1, and the thread clamping assembly is arranged below each movable knife.
6. The automatic thread trimming device according to claim 4 or 5, wherein the thread clamping assembly comprises a thread clamping piece and a thread clamping spring piece, the thread clamping piece is positioned above the thread clamping spring piece, the thread clamping piece is directly contacted with the lower surface of the movable blade, and the end part of the thread clamping spring piece is directly contacted with the lower surface of the thread clamping piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921880297.XU CN212199616U (en) | 2019-11-04 | 2019-11-04 | Automatic thread trimming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921880297.XU CN212199616U (en) | 2019-11-04 | 2019-11-04 | Automatic thread trimming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212199616U true CN212199616U (en) | 2020-12-22 |
Family
ID=73805747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921880297.XU Active CN212199616U (en) | 2019-11-04 | 2019-11-04 | Automatic thread trimming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212199616U (en) |
-
2019
- 2019-11-04 CN CN201921880297.XU patent/CN212199616U/en active Active
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