CN213708731U - Sewing machine and thread trimming mechanism thereof - Google Patents
Sewing machine and thread trimming mechanism thereof Download PDFInfo
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- CN213708731U CN213708731U CN202022766785.7U CN202022766785U CN213708731U CN 213708731 U CN213708731 U CN 213708731U CN 202022766785 U CN202022766785 U CN 202022766785U CN 213708731 U CN213708731 U CN 213708731U
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Abstract
The utility model discloses a sewing machine and thread trimming mechanism thereof, thread trimming mechanism are including independent setting and the same left thread trimming subassembly of structure and right thread trimming subassembly, and the mutual noninterference of the thread trimming action of the two makes the two both can the thread trimming simultaneously but also can the thread trimming alone, avoids one of them independent action and the off-line problem that induces, and application range is not influenced by synchronous thread trimming, and application range widens, and adaptability obtains promoting. Further, left side trimming subassembly includes left shuttle frame and left driving piece, and left driving piece sets firmly on left shuttle frame, and left side trimming subassembly is the same with right trimming subassembly's structure, can cancel and set up current length adjustment connecting rod, avoids changing the needle position and receives the restriction of length adjustment connecting rod, and adaptability further obtains promoting.
Description
Technical Field
The utility model relates to a clothing equipment technical field, in particular to sewing machine and thread trimming mechanism thereof.
Background
The existing thread trimming mechanism of the sewing machine comprises a left thread trimming assembly and a right thread trimming assembly, the left thread trimming assembly and the right thread trimming assembly are hinged to two ends of a thread trimming connecting rod respectively, the left thread trimming assembly and the right thread trimming assembly are enabled to be linked, and then the left moving knife and the right moving knife are enabled to trim threads synchronously. In addition, for the existing thread cutting mechanism, the thread cutting connecting rod and the length adjusting connecting rod must be adjusted when the needle position is changed, but the adjustable range of the length adjusting connecting rod is limited, and the needle position has limitation, so that the application range of the needle position is further limited, and the adaptability is further weakened.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a sewing machine and thread trimming mechanism thereof, the left driving piece of left thread trimming subassembly sets firmly on left shuttle frame, and right thread trimming subassembly is so set up equally, makes the thread trimming action mutual noninterference of left thread trimming subassembly and right thread trimming subassembly, avoids changing the needle position and receives the restriction of length adjustment connecting rod, and adaptability is better.
The specific scheme is as follows:
the utility model provides a thread trimming mechanism of sewing machine, including independent setting and the same left thread trimming subassembly of structure and right thread trimming subassembly, left thread trimming subassembly includes left shuttle frame and sets firmly in the left driving piece of left shuttle frame.
Preferably, the left thread trimming assembly includes:
a left fixed knife is fixedly arranged;
a left-hand knife;
the left sliding component is connected with the left moving blade and used for driving the left moving blade to slide relative to the left fixed blade along a line so as to enable the left fixed blade and the left moving blade to be matched with each other for trimming;
and the left driving component is connected with the left sliding component to drive the left sliding component to act.
Preferably, the left slide assembly includes:
the left sliding seat is connected with the left moving blade;
a left slide rail matched with the left slide seat;
and the left moving knife shaft is provided with a left poking rod which is meshed with the left sliding seat and is used for poking the left sliding seat to slide along the left sliding rail.
Preferably, the left drive assembly comprises:
the left driving connecting rod is fixedly connected with the left driving piece;
a left trimming lever fixedly connected with the left moving cutter shaft;
and the left driven connecting rod is hinged between the left driving connecting rod and the left trimming lever.
Preferably, the left shuttle frame is used for respectively supporting the left moving blade shaft and the left stationary knife, and the left thread trimming assembly further comprises at least one left elastic support which is fixedly arranged on the left shuttle frame, abuts against the left moving blade and is used for supporting the left moving blade.
Preferably, the left trimming assembly further comprises a left reset tension spring, one end of the left reset tension spring is fixed, and the other end of the left reset tension spring is connected with the left trimming lever.
Preferably, the left trimming assembly further comprises a left positioning pin which is fixedly arranged, abuts against a left positioning groove formed in the left trimming lever and is used for limiting the position of the left trimming lever when the left trimming lever is reset.
Preferably, the left moving blade shaft is provided with a left assembling limiting groove, the left trimming lever is provided with a left assembling limiting opening, and when the left assembling limiting groove is aligned with the left assembling limiting opening, the left fixed blade is at a preset initial position.
Preferably, the left driving part specifically drives actuating cylinder, and left trimming subassembly still includes left solenoid valve, and two air inlets that drive actuating cylinder pass through the intake pipe and link to each other with the solenoid valve, and left solenoid valve links to each other with the controller, and the controller is used for opening so that drive actuating cylinder drive left knife action according to the trimming instruction control left solenoid valve of input.
The utility model provides a sewing machine, including above-mentioned arbitrary trimming mechanism.
Compared with the prior art, the utility model provides a sewing machine's thread trimming mechanism is including the left thread trimming subassembly and the right thread trimming subassembly of independent setting, and the mutual noninterference of the thread trimming action of the two makes the two both can the thread trimming simultaneously and can the thread trimming alone, avoids one of them independent action and the off-line problem that induces, and application range does not receive synchronous thread trimming to influence, and application range widens, and adaptability obtains promoting. Further, left side trimming subassembly includes left shuttle frame and left driving piece, and left driving piece sets firmly on left shuttle frame, and left side trimming subassembly is the same with right trimming subassembly's structure, can cancel and set up current length adjustment connecting rod, avoids changing the needle position and receives the restriction of length adjustment connecting rod, and adaptability further obtains promoting.
The utility model provides a sewing machine who contains above-mentioned thread trimming mechanism has the same beneficial effect.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a structural view of a thread trimming mechanism of a sewing machine according to an embodiment of the present invention;
FIG. 2 is a block diagram of the left thread trimming assembly of FIG. 1;
FIG. 3 is another view of FIG. 2;
FIG. 4 is an assembled view of the left slide assembly and the left drive assembly of FIG. 1;
FIG. 5 is another view of FIG. 4;
FIG. 6 is an assembled view of the left slide assembly of FIG. 1;
fig. 7 is a structural view of the left slider in fig. 1.
The reference numbers are as follows:
a left thread trimming assembly 1 and a right thread trimming assembly 2;
the left fixed knife 11, the left moving knife 12, the left sliding component 13, the left driving component 14, the left shuttle frame 15, the left elastic support 16, the left reset tension spring 17 and the left positioning pin 18;
a left slide seat 131, a left slide rail 132 and a left knife shaft 133;
a left tap lever 1331 and a left assembly limit slot 1332;
a left driving piece 141, a left driving connecting rod 142, a left trimming lever 143 and a left driven connecting rod 144;
a left assembly limit port 1431.
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.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 7, fig. 1 is a structural diagram of a thread trimming mechanism of a sewing machine according to an embodiment of the present invention; FIG. 2 is a block diagram of the left thread trimming assembly of FIG. 1; FIG. 3 is another view of FIG. 2; FIG. 4 is an assembled view of the left slide assembly and the left drive assembly of FIG. 1; FIG. 5 is another view of FIG. 4; FIG. 6 is an assembled view of the left slide assembly of FIG. 1; fig. 7 is a structural view of the left slider in fig. 1.
The embodiment of the utility model discloses sewing machine's thread trimming mechanism, its key improvement point lies in changing the mounted position of left driving piece 141, makes left thread trimming subassembly 1 and right thread trimming subassembly 2 independently set up, makes the two noninterference, and changes the needle position and avoid the restriction of length adjustment connecting rod to promote adaptability.
The utility model discloses an independent setting's left trimming subassembly 1 and right trimming subassembly 2, the mutual noninterference of the trimming action of the two makes the two trimming both simultaneously but also trimming alone, avoids one of them independent action and the off-line problem that induces, and application range does not receive synchronous trimming to influence, and application range widens, and adaptability obtains promoting.
The left thread cutting assembly 1 and the right thread cutting assembly 2 are identical in structure and are used for cutting off a thread. Taking the left thread trimming assembly 1 as an example, the left thread trimming assembly 1 comprises a left shuttle frame 15 and a left driving part 141, the left driving part 141 is fixedly arranged on the left shuttle frame 15, the installation position of the left driving part 141 is changed from an original machine shell into the left shuttle frame 15, similarly, the right driving part is fixedly arranged on the right shuttle frame, the existing length adjusting connecting rod can be cancelled, the needle replacement position is prevented from being limited by the length adjusting connecting rod, and the adaptability is further improved. The structure and the installation manner of the left driving member 141 refer to the following.
Therefore, the thread trimming mechanism of the sewing machine provided by the utility model has relatively good adaptability.
Taking the left thread trimming assembly 1 as an example, the left thread trimming assembly 1 comprises a left fixed cutter 11, a left movable cutter 12, a left sliding assembly 13 and a left driving assembly 14, the position of the left fixed cutter 11 is fixed, and the left fixed cutter 11 is detachably fixed on a left shuttle frame 15 by means of a plurality of screws. The left blade 12 slides back and forth relative to the left stationary blade 11, and when the left stationary blade 11 abuts against the left blade 12, the suture can be cut by the biting force generated between the left stationary blade 11 and the left blade 12. The specific structure of the left knife 12 and the left stationary knife 11 can refer to the prior art. The left sliding assembly 13 is connected with the left moving blade 12, the left driving assembly 14 is connected with the left sliding assembly 13, the left driving assembly 14 is started, the left driving assembly 14 drives the left sliding assembly 13 to move, the left sliding assembly 13 drives the left moving blade 12 to linearly slide relative to the left fixed blade 11, the left moving blade 12 is close to or far away from the left fixed blade 11, and when the left moving blade 12 abuts against the left fixed blade 11, a suture is cut. Similarly, the working principle of the right thread trimming assembly 2 is the same as that of the left thread trimming assembly 1, and thread trimming can be realized.
In this embodiment, the left sliding assembly 13 includes a left sliding base 131, a left sliding rail 132 and a left moving blade shaft 133, and the left sliding base 131 is connected to the left moving blade 12. Specifically, the left slide seat 131 is stepped, and the left blade 12 is fixed to the top of the left slide seat 131 by means of a fastening screw. The left slide rail 132 is engaged with the left slide base 131, the position of the left slide rail 132 is fixed, and the left slide base 131 is guided by the left slide rail 132 to slide. The left slide seat 131 and the left slide rail 132 can be additionally provided with a guide groove and a guide block which are matched with each other, the guide groove and the guide block are both in a dovetail shape, and the guide groove and the guide block are matched with each other to prevent the left slide seat 131 from being separated from the left slide rail 132. Of course, stop blocks may be added to both ends of the left slide rail 132 to further prevent the left slide carriage 131 from disengaging from the left slide rail 132 due to inertia. The stop block is detachably fixed by a screw. The left knife shaft 133 can rotatably penetrate through the left shuttle frame 15, one end of the left knife shaft 133 close to the left knife 12 is provided with a left poke rod 1331, the left poke rod 1331 is engaged with the left slide carriage 131, specifically, the left slide carriage 131 is provided with an engaging groove matched with the left poke rod 1331, so that the left knife shaft 133 drives the left slide carriage 131 to slide along the left slide rail 132 through the left poke rod 1331. Of course, the structure of the left slide assembly 13 is not limited thereto.
The left driving assembly 14 may be a connecting rod assembly, the left driving assembly 14 includes a left driving element 141, a left driving connecting rod 142, a left trimming lever 143, and a left driven connecting rod 144, the left driving element 141 may be a driving cylinder, and of course, a servo motor may also be used, which is not limited herein. The left driving connecting rod 142 is fixedly connected with the left driving piece 141, the left trimming lever 143 is fixedly connected with the left moving blade shaft 133, and the left driven connecting rod 144 is hinged between the left driving connecting rod 142 and the left trimming lever 143. When the left driving member 141 is started, the left driving member 141 drives the left driving link 142 to rotate, the left driving link 142 drives the left trimming lever 143 to swing through the left driven link 144, and the left trimming lever 143 drives the left knife shaft 133, so that the left knife 12 moves relative to the left stationary knife 11. Of course, the structure of the left drive assembly 14 is not limited thereto.
As can be seen from the above, the left shuttle frame 15 can be used to support the left knife shaft 133 and the left stationary knife 11. In consideration of reliability, the left trimming assembly 1 further includes at least one left elastic support 16, and all the left elastic supports 16 are stacked. One end of each left elastic support 16 is fixed on the left shuttle frame 15 by means of a fastening screw, the other end of each left elastic support is elastically abutted against one side of the left moving knife 12 far away from the left fixed knife 11 to provide supporting force for the left moving knife 12, the left elastic support 16 compensates the abrasion loss of the left moving knife 12 or the left fixed knife 11 to a certain extent by restoring elastic deformation, so that the left moving knife 12 is continuously abutted against the left fixed knife 11, the service lives of the left moving knife 12 and the left fixed knife 11 are prolonged, and the thread cutting is reliable. In this embodiment, two left elastic supports 16 are disposed at the bottom of the left blade 12.
In order to realize quick reset, the left trimming assembly 1 further comprises a left reset tension spring 17, a first end of the left reset tension spring 17 is fixed, and a second end of the left reset tension spring is connected with the left trimming lever 143. Specifically, a fixed pin is fixed to the left shuttle frame 15, and a first end of the left return tension spring 17 is hooked on the fixed pin. When the left driving member 141 is started, the left driving member 141 drives the left trimming lever 143 to swing through the left driving connecting rod 142 and the left driven connecting rod 144, and the left reset tension spring 17 is stretched to store energy until the left moving blade 12 abuts against the left stationary blade 11, so as to perform trimming; after finishing the trimming, left trimming lever 143 resets under left driving piece 141's effect on the one hand, and on the other hand is pulled back by tensile left extension spring 17 that resets and resets, and dual effort is favorable to left trimming lever 143 to reset fast, and then makes left sword 12 reset fast, plays the positive role to promoting sewing efficiency.
In order to improve the sewing quality, the left trimming assembly 1 further comprises a left positioning pin 18 with a fixed position, when the left trimming lever 143 resets, a left positioning groove formed in the left trimming lever 143 abuts against the left positioning pin 18, the left trimming lever 143 is prevented from continuing to move, the left moving blade 12 is further prevented from continuing to move, the left moving blade 12 stays at a preset initial position every time, the left moving blade 12 reliably abuts against the left fixed blade 11, and trimming failure is avoided. When the left positioning groove abuts against the left positioning pin 18, the left reset tension spring 17 is in a stretching state.
In order to improve the assembly efficiency, the left moving blade 133 is provided with a left assembly limiting groove 1332, the left trimming lever 143 is provided with a left assembly limiting opening 1431, and when the left moving blade 133 and the left trimming lever 143 are assembled, the left assembly limiting groove 1332 is ensured to be aligned with the left assembly limiting opening 1431, so that the left stationary knife 11 is ensured to be in a preset initial position, the repeated debugging of the relative position of the left moving blade 133 and the left trimming lever 143 is avoided, and the rapid assembly is favorably realized. It should be noted that the left assembly limiting groove 1332 and the left assembly limiting opening 1431 are mainly used in the assembly stage of the product, and when sewing, the left moving blade 133 and the left trimming lever 143 keep fixed connection and swing synchronously. In addition, considering the moving distance of the left moving blade 12 each time, the preset initial position can ensure that the left moving blade 12 starts from the same position each time, so as to avoid the left moving blade 12 excessively pressing the left fixed blade 11 due to excessively approaching the left fixed blade 11, or avoid the left moving blade 12 being incapable of contacting the left fixed blade 11 due to excessively departing the left fixed blade 11, and to realize the thread cutting when the left moving blade 12 moves each time.
The utility model provides a left thread trimming subassembly 1 of thread trimming mechanism of sewing machine's theory of operation as follows:
starting the left driving part 141 to rotate in the forward direction, driving the left driving connecting rod 142 to rotate by the left driving part 141, driving the left trimming lever 143 to swing by the left driving connecting rod 142 through the left driven connecting rod 144, driving the left moving blade 133 to swing by the left trimming lever 143, driving the left sliding base 131 to slide along the left sliding rail 132 by the left poking rod 1331, driving the left moving blade 12 to slide to the left fixed blade 11 by the left sliding base 131, until the left moving blade 12 abuts against the left fixed blade 11, and cutting off the sewing thread;
the left driving member 141 is started to rotate reversely, the left driving member 141 drives the left trimming lever 143 to reset through the left driving connecting rod 142 and the left driven connecting rod 144 until the left trimming lever 143 abuts against the left positioning pin 18, and the left trimming lever 143 drives the left knife 12 to return to the preset initial position through the left knife shaft 133.
The working principle of the right thread cutting assembly 2 is the same as that of the left thread cutting assembly 1, and the description is omitted.
The utility model provides a sewing machine, including foretell thread trimming mechanism, have the same beneficial effect.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a thread trimming mechanism of sewing machine which characterized in that, independent setting and the same left thread trimming subassembly (1) of structure and right thread trimming subassembly (2), left thread trimming subassembly (1) include left shuttle frame (15) and set firmly in left driving piece (141) of left shuttle frame (15).
2. The thread trimming mechanism of a sewing machine according to claim 1, characterized in that the left thread trimming assembly (1) comprises:
a left fixed knife (11) which is fixedly arranged;
a left-hand knife (12);
the left sliding assembly (13) is connected with the left moving blade (12) and is used for driving the left moving blade (12) to linearly slide relative to the left fixed blade (11) so as to enable the left fixed blade (11) and the left moving blade (12) to be matched with each other for trimming;
and the left driving component (14) is connected with the left sliding component (13) to drive the left sliding component (13) to act.
3. The thread trimming mechanism of a sewing machine according to claim 2, characterized in that said left sliding assembly (13) comprises:
a left slide seat (131) connected with the left moving blade (12);
a left slide rail (132) which is matched with the left slide seat (131);
the left knife shaft (133), the left knife shaft (133) with left slide (131) interlock and be used for stirring left slide (131) are followed the gliding left poker rod (1331) of left slide (132).
4. The thread trimming mechanism of a sewing machine according to claim 3, wherein the left driving assembly (14) comprises:
a left driving connecting rod (142) fixedly connected with the left driving piece (141);
a left trimming lever (143) fixedly connected with the left moving blade shaft (133);
and the left driven connecting rod (144) is hinged between the left driving connecting rod (142) and the left trimming lever (143).
5. The thread trimming mechanism of a sewing machine according to claim 4, wherein the left bobbin (15) is configured to support the left moving blade (133) and the left stationary blade (11), respectively, and the left thread trimming assembly (1) further comprises at least one left elastic support (16) fixedly disposed on the left bobbin (15) and abutting against the left moving blade (12) for supporting the left moving blade (12).
6. The thread trimming mechanism of a sewing machine according to claim 4, wherein the left thread trimming assembly (1) further comprises a left return tension spring (17) having one end fixed and the other end connected to the left thread trimming lever (143).
7. The thread trimming mechanism of a sewing machine according to claim 6, wherein the left thread trimming assembly (1) further comprises a left positioning pin (18) fixedly arranged and abutted against a left positioning groove arranged on the left thread trimming lever (143) for defining the position of the left thread trimming lever (143) when the left thread trimming lever (143) is reset.
8. The thread trimming mechanism of a sewing machine according to any one of claims 4 to 7, wherein the left moving blade (133) is provided with a left assembly limiting groove (1332), the left trimming lever (143) is provided with a left assembly limiting opening (1431), and the left stationary blade (11) is in a preset initial position when the left assembly limiting groove (1332) is aligned with the left assembly limiting opening (1431).
9. The thread trimming mechanism of the sewing machine according to any one of claims 4 to 7, wherein the left driving member (141) is a driving cylinder, the left thread trimming assembly (1) further comprises a left electromagnetic valve, two air inlets of the driving cylinder are connected with the electromagnetic valve through an air inlet pipe, the left electromagnetic valve is connected with a controller, and the controller is used for controlling the left electromagnetic valve to be opened according to an input thread trimming command so that the driving cylinder drives the left knife (12) to move.
10. A sewing machine comprising the thread trimming mechanism of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022766785.7U CN213708731U (en) | 2020-11-25 | 2020-11-25 | Sewing machine and thread trimming mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022766785.7U CN213708731U (en) | 2020-11-25 | 2020-11-25 | Sewing machine and thread trimming mechanism thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213708731U true CN213708731U (en) | 2021-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022766785.7U Active CN213708731U (en) | 2020-11-25 | 2020-11-25 | Sewing machine and thread trimming mechanism thereof |
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| Country | Link |
|---|---|
| CN (1) | CN213708731U (en) |
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2020
- 2020-11-25 CN CN202022766785.7U patent/CN213708731U/en active Active
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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: 318014 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee before: JACK SEWING MACHINE Co.,Ltd. |