CN113089200B - Intelligent thread tension balancing device and sewing machine - Google Patents
Intelligent thread tension balancing device and sewing machine Download PDFInfo
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- CN113089200B CN113089200B CN202110379382.3A CN202110379382A CN113089200B CN 113089200 B CN113089200 B CN 113089200B CN 202110379382 A CN202110379382 A CN 202110379382A CN 113089200 B CN113089200 B CN 113089200B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B47/00—Needle-thread tensioning devices; Applications of tensometers
- D05B47/04—Automatically-controlled tensioning devices
Abstract
The invention provides an intelligent wire tension balancing device, which comprises a wire clamping mechanism and a driving mechanism, wherein the wire clamping mechanism comprises a wire clamping rod and a wire clamping rod; the wire clamping mechanism comprises a clamping elastic sheet and a wire passing shaft; a wire passing groove is formed in the cylindrical surface of the wire passing shaft along the rotation direction of the wire passing shaft, and the wire passing groove is of a non-closed structure; the clamping elastic sheet is tightly attached to the outer surface of the wire passing shaft through an extending arm with an elastic and sheet-shaped structure to form matching connection; the driving mechanism is in driving connection with the wire passing shaft and is used for driving the wire passing shaft to rotate. The invention provides an intelligent thread tension balancing device which can automatically generate two states of tensioning and loosening of a sewing thread in the sewing process so as to achieve the effect of intelligent thread tension balance adjustment. The sewing machine produces line tension when sewing the receipts line, reaches the effect of tightening up the suture and sew up tight cloth, and tension is not had when normally pay-off when lax state is in order to guarantee smooth and easy of pay-off, avoids the cloth to corrugate.
Description
Technical Field
The invention belongs to the technical field of sewing machines, and particularly relates to an intelligent thread tension balancing device and a sewing machine.
Background
In the process of sewing the cloth by the sewing machine, when the sewing thread is sewn along with the sewing needle, the sewing thread needs to be tensioned and loosened frequently, the sewing thread needs to be loosened when a common needle enters, the sewing thread needs to be tensioned when the needle is pulled out, and the tensioning force needs to adapt to the speed and the thickness of the cloth when sewing, so that the thread breakage can not be caused, and the quality of a sewing product can be ensured.
The thread tension of the existing sewing machine is generally determined by mechanical adjustment, so that the thread tension is relatively fixed, different tensions required by high speed, low speed, thick material and thin material during sewing cannot be met, the sewing quality is reduced, and the bad phenomena of unstable winding, uneven stitch, wrinkling of cloth, thread breakage and the like can be frequently caused.
In addition, the invention carries out detailed retrieval through the state intellectual property office official government affairs retrieval service system, obtains the following prior arts, and simply introduces the prior arts so as to better understand the inventive concept of the invention and show the technical advantages and the technical characteristics of the invention.
Prior art 1: CN101403168B discloses a thread tension control device for a sewing machine, which can directly control the tension itself applied to the thread, thereby maintaining and controlling the thread tension to be set in advance when the balance is lifted, regardless of the type, thickness, elongation characteristics, and time variation of the device. It has the following components: a wire adjusting disk for winding a wire, a pulse motor for setting the wire adjusting disk on an output shaft of the motor, an encoder unit, a pulse motor driving unit, a wire tension setting unit, a phase difference detecting unit, and a table indicating a relationship between the set wire tension and the rotational phase difference corresponding thereto, wherein the pulse motor is rotated by applying a driving signal thereto so as to maintain a rotational phase difference between the wire adjusting disk and the output shaft of the pulse motor caused by the wire pulling at a magnitude of the rotational phase difference corresponding to the set wire tension; however, the prior art adopts a pulse motor for driving, so that the manufacturing cost is high and the maintenance cost is high;
prior art 2: CN101798728A discloses a sewing machine capable of adjusting thread tension and a thread tension setting method for setting thread tension. A position designating part of the sewing machine designates a designated position which is a position for setting or changing a thread tension value in a sewing pattern. The transfer mechanism transfers the processing cloth according to the designation of the position designating part, thereby moving the designated position on the processing cloth to the needle drop place. An operator can easily and reliably set a thread tension value while observing and confirming an actual needle falling place on the processing cloth, but the prior art still adopts a more complex control mechanism, so the manufacturing cost is high, and the maintenance cost is high;
prior art 3: CN202164439U discloses a feeding device capable of controlling the conveying speed and the tension of sewing thread, which mainly comprises a frame set, a conveying set, a substrate, a tension control set, a clamping control set, and a rotation speed controller; the transmission group comprises a first motor and a wire winding wheel, and is respectively arranged at one end of the bracket group together with the substrate, the tension control group is arranged on the substrate and comprises a second motor, a first pressing wheel, a second pressing wheel, a first guide wheel and a second guide wheel, wherein the clamping and pressing control group is connected with the first pressing wheel and can control whether the first pressing wheel touches the second pressing wheel; however, the control assembly in the prior art has a complex structure, and the actual control effect of the tension is not ideal;
prior art 4: CN112048843A discloses an intelligent facial line tension adjusting device and its adjusting method. The invention comprises an upper thread tension component, a sewing material thickness detection component and a control component; in the sewing process, the thickness of the sewing material is sensed autonomously, the tension of the upper thread is automatically and intelligently adjusted according to the thickness of the sewing material, the step of manually adjusting the tension is completely omitted, and the tension of the upper thread can be changed according to the real-time change of the thickness of the sewing material in the sewing process; the facial line tension can be directly set through the liquid crystal screen, and facial line tension adjusting parameters are visual. The invention has simple operation; keeping the stitch of the upper thread stable; after the thread is cut, the thread cutting thread head is shorter, the manufacturing process of the sewing product is greatly saved, the production efficiency of the sewing product is improved, and the thread trace is stable and attractive in the whole sewing process; however, in the prior art, a complex inductance structure is adopted, and although the detection result is accurate, the manufacturing cost and the maintenance cost are too high;
prior art 5: KR1020130037566A discloses a thread tension control device of a sewing machine comprising a tension control unit (1100), a body (1200), and a fixing unit. The tension control unit includes a solenoid (1110), a drive shaft (1120), a moving member (1130), and a moving rod (1140). The solenoid generates a driving force that moves in a linear direction through a control signal. One end of the drive shaft is mounted to the solenoid of the central drive shaft. The drive shaft moves in a linear direction by driving a solenoid. The driving shaft of the moving member is fixed to the other end to be coaxial with the driving and moving; but the prior art still adopts an electromagnetic control technology, so that the manufacturing cost is higher;
as will be appreciated by those skilled in the art from the foregoing description of the prior art, the thread tension adjusting device of the sewing machine currently available has the following features:
(1) generally, electromagnetic sensor structures and the like are adopted;
(2) the tension of the sewing thread is passively adjusted by a feedback form.
In addition, with the development of various material technologies, more and more technologies form the feedback of the textile industry, but the applicant finds through search that in the sewing machine technology field, the black technology of the feedback mostly focuses on the electronic circuit technology, and in consideration of the characteristics of the sewing technology, the characteristics of reliability and low cost of the mechanical structure should not be abandoned, which is not noticed in the prior art.
That is, the applicant found that, in the prior art, sensing technologies such as circuit electronics are generally adopted to control the sewing thread tension, but few people have made improvements on the mechanical structure itself, because it is generally considered that the mechanical structure itself may have a bias of "deterioration" or "behind", and people mostly adopt electronic technologies to solve the related problems, that is, few people pay attention to the improvement on the mechanical structure itself from the viewpoint of cost reduction and reliability improvement to seek related technical means, that is, after searching, the prior art has given technical suggestions, and no people have found similar technical means.
Therefore, it is an urgent need to provide a thread tension device and a sewing machine that can solve the above-mentioned problems.
Therefore, the invention is based on the overall state of the art described above and creatively forms the solution of the invention starting from the mechanical structure itself.
Disclosure of Invention
The invention provides an intelligent thread tension balancing device which can automatically generate two states of tensioning and loosening of a sewing thread in the sewing process so as to achieve the effect of intelligent thread tension balance adjustment. The sewing machine produces line tension when sewing the receipts line, reaches the effect of tightening up the suture and sew up tight cloth, and tension is not had when normally pay-off when lax state is in order to guarantee smooth and easy of pay-off, avoids the cloth to corrugate.
The invention is realized by the following technical scheme.
An intelligent wire tension balancing device comprises a wire clamping mechanism and a driving mechanism; the wire clamping mechanism comprises a clamping elastic sheet and a wire passing shaft; a thread passing groove is formed in the cylindrical surface of the thread passing shaft along the rotation direction of the thread passing shaft, the thread passing groove is of a non-closed structure, and sewing threads can pass through the thread passing groove; the clamping elastic sheet is tightly attached to the outer surface of the wire passing shaft through an extending arm with an elastic and sheet-shaped structure to form matching connection; the driving mechanism is in driving connection with the wire passing shaft and is used for driving the wire passing shaft to rotate; the driving mechanism is connected with a take-up lever of the sewing machine in a driving mode, when the driving mechanism drives the take-up lever to reach the lowest point, the thread passing shaft is driven to rotate to the cylindrical surface part of the clamping spring sheet clamp so as to clamp the sewing thread, and when the driving mechanism drives the take-up lever to cross the lowest point, the driving mechanism is separated from the thread passing shaft in a driving mode.
On the basis of the technical scheme, the invention can also have the following further improvement scheme.
Furthermore, the clamping elastic sheet comprises two oppositely-arranged extending arms, the wire passing shaft comprises two wire passing grooves, the two wire passing grooves are oppositely arranged on two sides of the cylindrical surface of the wire passing shaft, and the two extending arms are clamped on the outer surface of the wire passing shaft and keep a clamping state.
Further, the driving mechanism carries out periodic transmission on the wire through shaft under the action of magnetic force.
Furthermore, one end of the wire passing shaft is matched and connected with the clamping elastic sheet, the other end of the wire passing shaft is fixedly connected with a first magnet, and a preset included angle is formed between the N-S magnetic level direction of the first magnet and the radial extension direction of the wire passing groove; the driving mechanism comprises a second magnet, the second magnet is fixedly connected to a main shaft of the sewing machine and has a preset distance with the axis of the main shaft, and the second magnet is connected with the first magnet in a periodic magnetic transmission mode after rotating along with the main shaft.
Further, the driving mechanism further comprises a needle rod crank, the needle rod crank is fixedly connected to the main shaft, and the second magnet is fixedly connected to the edge of the needle rod crank.
Further, the thread clamping mechanism further comprises a mounting seat, the mounting seat is fixedly mounted on the machine body of the sewing machine, the clamping elastic sheet is fixedly mounted on the mounting seat, and the thread passing shaft is rotatably connected to the mounting seat.
Furthermore, the thread clamping mechanism also comprises a threading plate; the middle part of the mounting seat is provided with a through hole, two sides of the mounting seat are provided with a first mounting table and a second mounting table which are opposite, and the clamping elastic sheet and the threading plate are respectively and fixedly connected to the first mounting table and the second mounting table; the wire through shaft passes through the through hole.
Furthermore, the wire clamping mechanism also comprises a limiting block; the limiting block is fixedly connected to the wire passing shaft and positioned between the first mounting table and the second mounting table; the first installation platform and the second installation platform are both provided with limiting protrusions facing to the central direction, and the limiting protrusions limit the rotation range of the limiting blocks.
Further, the wire clamping mechanism also comprises a buffer pad; the cushion pad is clamped on the mounting seat and is connected with the limiting bulge in a matching way; the buffer pad is further provided with a cylindrical protrusion, and the cylindrical protrusion is embedded in the clamping elastic sheet.
Compared with the prior art, the intelligent thread tension balancing device provided by the invention can solve the problem that the thread tension of the traditional sewing machine needs manual adjustment when different tension requirements of thick and thin materials are different, can automatically perform balance adjustment of the thread tension according to the tension requirement during sewing, realizes the function of intelligently balancing the thread tension, is not influenced by the thickness of the sewing material and the sewing speed. The tightening force of the sewing thread can be self-adapted whether thick or thin or at high or low speed, and the tightening process is consistent, thereby ensuring the quality of the sewing product.
By adopting the intelligent thread tension balancing device provided by the invention, the driving mechanism is simultaneously in driving connection with the thread passing shaft and the thread take-up lever of the sewing machine, so that when the driving mechanism drives the thread take-up lever to reach the lowest point, the thread passing shaft is simultaneously driven to rotate to the cylindrical surface part of the clamping elastic sheet to clamp the sewing thread, when the driving mechanism drives the thread take-up lever to cross the lowest point, the driving mechanism is separated from the thread passing shaft for driving, after the separation from the driving, the sewing thread can provide a torque for the thread passing shaft due to the resistance of the sewing cloth and the acting force of other threads intersected with the thread, and the torque can overcome the clamping force of the clamping elastic sheet to enable the thread passing shaft to rotate to the thread passing groove to be opposite to the clamping elastic sheet, and the sewing thread returns to the thread passing groove to be in a loose state.
Therefore, the tension balancing device provided by the invention can generate two states of clamping and loosening of the sewing thread in the sewing process, and achieves the effect of intelligent thread tension balancing. When the sewing thread is in a clamping state and is taken up, the thread tension is automatically generated by the line, and when the intersection point of the bottom thread and the sewing thread receives the middle of the cloth, the thread tension of the bottom thread and the sewing thread reaches a balance point; the sewing thread is in a slack state and has no tension when normally feeding so as to ensure smooth feeding.
The invention also provides a sewing machine, which comprises the intelligent thread tension balancing device. Because the thread tension adjusting device has the beneficial technical effects, the sewing machine comprising the intelligent thread tension balancing device also has the same beneficial technical effects, and the details are not repeated.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of an intelligent wire tension balancing apparatus according to the present invention;
FIG. 2 is a schematic side view of the embodiment shown in FIG. 1;
FIG. 3 is a disassembled view of one embodiment of the wire clamping mechanism;
FIG. 4 is a schematic structural view of one embodiment of the drive mechanism;
FIG. 5 is a schematic structural view of one embodiment of the spool;
FIG. 6 is a schematic structural view of one embodiment of the first magnet;
FIG. 7 is a schematic structural view of the spool before being acted on by the magnetic force of the driving mechanism;
FIG. 8 is a schematic structural view of the spool rotated to force balance under the action of the magnetic force of the driving mechanism;
FIG. 9 is a schematic perspective view of the clamping mechanism after winding the thread and with the sewing thread clamped;
FIG. 10 is a cross-sectional structural view of the sewing thread in a relaxed state;
fig. 11 is a sectional structure view of the sewing thread in a clamped state.
Wherein the part numbers in the figures are represented as:
1-mounting seat, 101-through hole, 102-limit protrusion, 103-first mounting table, 104-second mounting table, 2-clamping elastic sheet, 3-thread shaft, 4-screw, 5-limit block, 6-first magnet, 7-buffer pad, 701-columnar protrusion, 8-bearing, 9-thread plate, 901-thread hole, 10-main shaft, 11-second magnet, 12-needle bar crank, 201-extension arm, 301-thread groove, 20-sewing thread, 21-N-S magnetic level direction line of first magnet, and 22-thread groove direction line.
Detailed Description
The technical solutions and specific advantageous effects of the present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the drawings are only schematic diagrams provided for illustrating the invention, and are not true physical projection drawings; in addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention.
Referring to fig. 1 to 11, fig. 1 is a schematic perspective view of an embodiment of an intelligent wire tension balancing device disclosed in the present invention; FIG. 2 is a schematic side view of the embodiment shown in FIG. 1; FIG. 3 is a disassembled schematic view of one embodiment of the wire clamping mechanism; FIG. 4 is a schematic structural view of one embodiment of the drive mechanism; FIG. 5 is a schematic structural view of one embodiment of the spool; FIG. 6 is a schematic structural view of one embodiment of the first magnet; FIG. 7 is a schematic structural view of the spool before being acted on by the magnetic force of the driving mechanism; FIG. 8 is a schematic structural view of the spool rotated to force balance under the action of the magnetic force of the driving mechanism; FIG. 9 is a schematic perspective view of the clamping mechanism after winding the thread and with the sewing thread clamped; FIG. 10 is a cross-sectional structural view of the sewing thread in a relaxed state; fig. 11 is a sectional structure view of the sewing thread in a clamped state.
The invention discloses a specific embodiment of an intelligent wire tension balancing device, which comprises a wire clamping mechanism and a driving mechanism; the wire clamping mechanism comprises a mounting seat 1, a clamping elastic sheet 2 and a wire passing shaft 3; the mounting seat 1 is fixedly arranged on the body of the sewing machine, the clamping elastic sheet 2 is fixedly arranged on the mounting seat 1, and the thread passing shaft 3 is rotatably connected to the mounting seat 1; a wire passing groove 301 is formed in the cylindrical surface of the wire passing shaft 3 along the rotation direction of the wire passing shaft 3, and the wire passing groove 301 is of a non-closed structure; the clamping elastic sheet 2 is fixedly connected to the mounting seat 1 and is tightly attached to the outer surface of the wire passing shaft 3 through an extending arm 201 with an elastic and sheet-shaped structure to form matching connection; the driving mechanism is in driving connection with the wire passing shaft 3 and is used for driving the wire passing shaft 3 to rotate.
Among the above-mentioned technical scheme, press from both sides tight shell fragment 2 and can be the monolithic, also can be the biplate, and corresponding crossing wire casing 301 on the spool 3 sets up one and two, as preferred, as shown in fig. 1, fig. 3, press from both sides tight shell fragment 2 and include two relative settings the cantilever 201 (be the biplate formula), two cantilever 201 are the slice shell fragment, and relative parallel arrangement can set up a mounting plate for simple to operate, wholly with panel beating integrated into one piece can, can be fixed in on the mount pad 1 with pressing from both sides tight shell fragment 2 through screw 4. Correspondingly, the spool 3 includes two wire passing grooves 301, the two wire passing grooves 301 are oppositely disposed on two sides of the cylindrical surface of the spool 3, and the two protruding arms 201 are clamped on the outer surface of the spool 3 and maintain a clamping state. The thread passing groove 301 can be formed by processing two opposite grooves on the outer side surface of the same cylindrical shaft or assembling two parts, and it is ensured that the two grooves are opposite and cannot be annular closed grooves communicated into a whole, after the sewing thread 20 is wound in the thread passing groove 301, the sewing thread 20 just moves out of the thread passing groove 301 after the thread passing shaft is rotated for a certain angle, and is wound on the cylindrical surface, so that the clamping elastic sheet 2 can just clamp the sewing thread 20.
In addition, it should be noted that, in the present embodiment, the mounting base 1 is a single component, and in other specific embodiments, the mounting base 1 may also be a machine body (or a machine head) of the sewing machine, and only the relevant connecting portion needs to be processed in place when the machine body is processed, and the rest components are all mounted at the relevant portion.
In order to enable the sewing thread which bypasses the thread through shaft 3 to have two states of loosening and tensioning in the sewing process, the thread through shaft 3 needs to be driven, the driving mode can be an electronic mode or a mechanical mode, the invention utilizes the driving mechanism with the second magnet 11 to periodically drive the thread through the magnetic force, and simultaneously utilizes the resistance generated by the sewing thread in the sewing process to enable the sewing thread to be freely switched between the two states of loosening and tensioning in the sewing process.
Specifically, as shown in fig. 1 to 8, one end of the bobbin 3 is connected to the clamping spring 2 in a matching manner, and the other end of the bobbin is fixedly connected to the first magnet 6, and the first magnet 6 may be a disc-shaped permanent magnet and is fixedly connected to the end of the bobbin in a clamping manner or a welding manner.
The N-S magnetic level direction of the first magnet 6 and the radial extension direction of the wire passing groove 301 form a preset included angle; as shown in fig. 7 and 8, an angle θ is formed between the N-S magnetic level direction line 21 of the first magnetic body and the wire passing groove direction line 22. The driving mechanism comprises a second magnet 11, the second magnet 11 is fixedly connected to a main shaft 10 of the sewing machine and has a preset distance with the axis of the main shaft 10, and the second magnet 11 forms periodic magnetic transmission connection with the first magnet 6 after rotating along with the main shaft 10.
The angle between the N-S magnetic level direction line 21 and the thread passing groove direction line 22 of the first magnet is set according to the installation angle of the clamping spring 2, and the angle of the first magnet needs to be preset, so that when the second magnet 11 on the driving mechanism rotates to the position opposite to the first magnet 6, the thread passing shaft 3 is just driven to deflect to the part where the extending arm 201 can clamp the cylindrical surface due to the magnetic force action of like-pole repulsion and opposite-pole attraction, and the clamping effect on the sewing thread 20 is further realized.
In a preferred embodiment, the driving mechanism further comprises a needle bar crank 12, the needle bar crank 12 is fixedly connected to the main shaft 10, and the second magnet 11 is fixedly connected to an edge of the needle bar crank 12. The second magnet 11 may be a permanent magnet or a combination of two or more permanent magnets, and certainly, the direction of the N-S magnetic pole needs to be preset to achieve the effect of cooperating with the first magnet 6.
The main shaft 10 is an important component of the driving mechanism, and simultaneously drives the thread take-up lever (not shown in the figure) through a certain structural form, and when the main shaft 10 drives the second magnet 11 to rotate right opposite to the first magnet 6, the thread take-up lever is just driven to move to the lowest position. That is, when the thread take-up lever reaches the lowest position, the sewing thread is clamped, and when the thread take-up lever passes over the lowest position, the sewing thread is kept loose again.
Further, the thread clamping mechanism further comprises a threading plate 9, and a threading hole 901 for threading is formed in the threading plate 9; the middle part of the mounting seat 1 is provided with a through hole 101, two sides of the mounting seat are provided with a first mounting table 103 and a second mounting table 104 which are opposite to each other, and the clamping elastic sheet 2 and the threading plate 9 are respectively and fixedly connected to the first mounting table 103 and the second mounting table 104; the wire through shaft 3 passes through the through hole 101 and is rotatably connected with the mounting seat 1 through a bearing 8.
For preventing the threading plate 9 and the clamping elastic sheet 2 from twisting during operation, the first mounting platform 103 and the second mounting platform 104 can be arranged in a groove shape, as shown in fig. 3, the threading plate 9 and the clamping elastic sheet 2 are provided with mounting parts, and the threading plate 9, the clamping elastic sheet 2 and the mounting seat can be fixedly connected through the groove-shaped structure without twisting.
Preferably, in order to prevent the rotation transition of the wire passing shaft 3, the wire clamping mechanism further comprises a limiting block 5; the limiting block 5 is fixedly connected to the wire passing shaft 3 and is located between the first mounting table 103 and the second mounting table 104; the first mounting table 103 and the second mounting table 104 are both provided with a limiting protrusion 102 facing the central direction, and the rotation range of the limiting block 5 is limited by the limiting protrusion 102.
The wire clamping mechanism further comprises a cushion pad 7; the cushion pad 7 may be made of rubber. The cushion pad 7 is clamped on the mounting seat 1 and is matched and connected with the limiting bulge 102; the buffer pad 7 is further provided with a cylindrical protrusion 701, and the cylindrical protrusion 701 is embedded in the clamping elastic sheet 2. The stud bumps 701 and the cushion pad 7 may be formed as an integral structure, and the shape of the stud bumps 701 is matched with the shape of the elastic clips 201.
The buffer pad 7 has the following effects that 1) the buffer function can be formed on the limiting block 5 and the clamping elastic sheet 201 so as to prolong the service life; 2. can play the noise elimination effect to stopper 5 in the spacing department of rotation, avoid noise pollution. 3) The cylindrical protrusion 701 on the buffer pad 7 can make the acting force of the elastic clip and the wire passing shaft soft when the wire is clamped, and no wire noise is generated; 3) the micro resistance can be provided for clamping the elastic sheet, the resistance can play a role in stabilizing stitches, and the sewing quality can be improved.
In the present invention, the main shaft 10 is a power transmission source of sewing operation of the sewing machine, and the sewing machine needle can be driven to reciprocate up and down to sew cloth by the rotation of the main shaft 10. Through the design of the structure, the action of the main shaft 10 and the action of the thread passing shaft 3 can be combined into a whole, and the rotation of the thread passing shaft 3 can be linked together along with the sewing action of a sewing machine needle, namely: when the thread passing shaft 3 needs to take up and tension, the main shaft 10 drives the second magnet 11 to just rotate to the position of the first magnet 6, the thread passing shaft 3 is driven to rotate through the magnetic force, and at the moment, the sewing thread 20 can be moved out of the thread passing groove 301 until the surface of the cylindrical surface is clamped by the clamping elastic sheet 2.
The above-mentioned is a specific embodiment of the thread tension adjusting device, and the specific embodiment of the sewing machine provided by the invention comprises the above-mentioned intelligent thread tension balancing device.
In the actual operation of the intelligent thread tension balancing device and the sewing machine, as shown in fig. 9, the sewing thread 20 penetrates through the threading hole 901 of the threading plate 9, passes through the threading groove 301 on one side of the threading shaft 3, winds around the threading shaft 3, passes through the threading groove 301 on the opposite side of the threading shaft 3, and then passes through the threading hole 901 of the threading plate 9.
The invention provides an intelligent thread tension balancing device and a sewing machine, which have the following working processes and principles:
when the second magnet 11 of the needle bar crank 12 rotates to be close to the first magnet 6, because the magnetic pole direction of the first magnet 6 and the magnetic pole direction of the second magnet 11 are not in the same direction and have an included angle, the first magnet 6 rotates under the magnetic action of the second magnet 11, and further drives the thread passing shaft 3 to rotate, when the magnetic force is balanced, the cylindrical surface part of the thread passing shaft 3 is just clamped by the clamping elastic sheet 2, namely the sewing thread 20 rotates from the slack state position to the clamped state position. At this time, acting force of other threads intersected with the thread on the thread and resistance of the thread passing through the cloth form a resultant force, the resultant force acts on the sewing thread 20, one end of the sewing thread is clamped by the clamping elastic sheet 2, a reverse acting force is generated, the two forces acting on the same sewing thread are equal in magnitude, opposite in direction and the same in acting thread, the thread tension of the sewing thread automatically reaches a balanced state until the thread is tightened, and the cloth sewing effect is achieved.
When the main shaft 10 continues to rotate and drives the second magnet 11 on the needle bar crank 12 to gradually get away from the first magnet 6, the magnetism of the second magnet 11 gradually loses the magnetic force effect on the first magnet 6, the line tension starts to form a torque on the spool 3, the spool 3 starts to rotate under the torque effect, and then the spool returns to the slack state position to start the next cycle.
In the whole working engineering, when the sewing thread 20 passes through the thread passing groove 301, the clamping elastic sheet 2 cannot clamp the sewing thread 20, the initial tension of the sewing thread is close to 0, the machine feeds the thread in the state, the sewing thread cannot generate tension on the cloth, and the cloth can be prevented from wrinkling.
The sewing machine has the stage of taking up the thread in the sewing process, the stage of taking up the thread is consistent no matter the thread is thick or thin, or the speed is high or low. The sewing thread 20 which is wound around the shaft has two states of clamping and loosening; in a clamping state, the clamping elastic sheet is tightly attached to the cylindrical surface of the position, where the wire passing groove 301 is not arranged, of the wire passing shaft, and in a loose state, the clamping elastic sheet is tightly attached to the cylindrical surface of the position, where the wire passing groove 301 is arranged, of the wire passing shaft; through the effect of actuating mechanism and the tension of sewing thread at the sewing in-process, make spool 3 reciprocating rotation, and then realize switching two kinds of states, realize the balanced effect of adjusting of a line tension of intelligence.
Because the second magnet 11 is only a part of the needle bar crank 12, the action time of the first magnet 6 by the magnetic force of the second magnet 11 is short, and the time of the state that the sewing thread bypassing the thread passing shaft 3 is clamped by the clamping elastic sheet 2 is far shorter than the time of the loose state, so that the sewing thread is in the loose state in a large work range (2/3 time) during sewing, the thread tension is close to 0, the smooth feeding is ensured, and the wrinkling of the cloth is avoided; the cloth is clamped only in the small winding-up time period, so that the cloth can be tightened during sewing.
In the specific embodiment provided by the invention, the driving mechanism is simultaneously in driving connection with the thread take-up lever and the thread passing shaft 3 of the sewing machine, and through the transmission structural form of magnetic force, when the driving mechanism drives the thread take-up lever to reach the lowest point, the thread passing shaft is simultaneously driven to rotate to the cylindrical surface part of the clamping spring sheet clamp so as to clamp the sewing thread, and when the driving mechanism drives the thread take-up lever to cross the lowest point, the driving mechanism is separated from the thread passing shaft for driving.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An intelligent wire tension balancing device is characterized by comprising a wire clamping mechanism and a driving mechanism;
the wire clamping mechanism comprises a clamping elastic sheet and a wire passing shaft;
the cylindrical surface of the thread passing shaft is provided with a thread passing groove along the rotation direction of the thread passing shaft, the thread passing groove is of an unsealed structure, and sewing threads can pass through the thread passing groove;
the clamping elastic sheet is tightly attached to the outer surface of the wire passing shaft through an extending arm with an elastic and sheet-shaped structure to form matching connection;
the driving mechanism is in driving connection with the wire passing shaft and is used for driving the wire passing shaft to rotate;
the driving mechanism is connected with a take-up lever of the sewing machine in a driving mode, when the driving mechanism drives the take-up lever to reach the lowest point, the thread passing shaft is driven to rotate to the cylindrical surface part of the clamping spring sheet clamp so as to clamp the sewing thread, and when the driving mechanism drives the take-up lever to cross the lowest point, the driving mechanism is separated from the thread passing shaft in a driving mode.
2. The intelligent wire tension balancing device as claimed in claim 1, wherein the clamping spring plate comprises two oppositely arranged protruding arms, the wire passing shaft comprises two wire passing grooves, the two wire passing grooves are oppositely arranged at two sides of the cylindrical surface of the wire passing shaft, and the two protruding arms are clamped on the outer surface of the wire passing shaft and keep a clamping state.
3. An intelligent thread tension balancing device as claimed in claim 1, wherein the drive mechanism drives the thread spool periodically by magnetic force.
4. Intelligent wire tension balancing device according to claim 3,
one end of the wire passing shaft is matched and connected with the clamping elastic sheet, the other end of the wire passing shaft is fixedly connected with a first magnet, and the N-S magnetic level direction of the first magnet and the radial extension direction of the wire passing groove form a preset included angle;
the driving mechanism comprises a second magnet, the second magnet is fixedly connected to a main shaft of the sewing machine and has a preset distance with the axis of the main shaft, and the second magnet is connected with the first magnet in a periodic magnetic transmission mode after rotating along with the main shaft.
5. The smart wire tension balancing device of claim 4, wherein the drive mechanism further comprises a needle bar crank fixedly attached to the spindle, the second magnet fixedly attached to an edge of the needle bar crank.
6. Intelligent wire tension balancing device according to claim 4,
the thread clamping mechanism further comprises a mounting seat, the mounting seat is fixedly mounted on the machine body of the sewing machine, the clamping elastic sheet is fixedly mounted on the mounting seat, and the thread passing shaft is rotatably connected to the mounting seat.
7. An intelligent thread tension balancing device according to claim 6, wherein the thread clamping mechanism further comprises a threading plate;
the middle part of the mounting seat is provided with a through hole, two sides of the mounting seat are provided with a first mounting table and a second mounting table which are opposite, and the clamping elastic sheet and the threading plate are respectively and fixedly connected to the first mounting table and the second mounting table;
the wire through shaft passes through the through hole.
8. The smart wire tension balancing device of claim 7, wherein the wire clamping mechanism further comprises a stop block;
the limiting block is fixedly connected to the wire passing shaft and positioned between the first mounting table and the second mounting table;
the first mounting table and the second mounting table are both provided with limiting bulges facing to the central direction, and the limiting bulges limit the rotation range of the limiting blocks.
9. The smart wire tension balancing apparatus of claim 8, wherein the wire clamping mechanism further comprises a cushion pad;
the cushion pad is clamped on the mounting seat and is connected with the limiting bulge in a matching way;
the buffer pad is further provided with a cylindrical protrusion, and the cylindrical protrusion is embedded in the clamping elastic sheet.
10. A sewing machine comprising a smart thread tension balancing device as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110379382.3A CN113089200B (en) | 2021-04-08 | 2021-04-08 | Intelligent thread tension balancing device and sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110379382.3A CN113089200B (en) | 2021-04-08 | 2021-04-08 | Intelligent thread tension balancing device and sewing machine |
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| CN113089200A CN113089200A (en) | 2021-07-09 |
| CN113089200B true CN113089200B (en) | 2022-06-21 |
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| CN202110379382.3A Active CN113089200B (en) | 2021-04-08 | 2021-04-08 | Intelligent thread tension balancing device and sewing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116536858B (en) * | 2022-12-19 | 2024-01-23 | 上海富山精密机械科技有限公司 | Wire tension self-balancing device, self-balancing method and application thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191304259A (en) * | 1913-02-19 | 1914-04-20 | Harold Wade | Improvements in the Method of Making Boots and Shoes. |
| GB579583A (en) * | 1944-07-19 | 1946-08-08 | Wallace Cranston Fairweather | Rotary take-up mechanism for sewing machines |
| US4825786A (en) * | 1987-06-12 | 1989-05-02 | Burch William A | Sewing method and apparatus |
| JP4189090B2 (en) * | 1999-07-28 | 2008-12-03 | Ｊｕｋｉ株式会社 | Sewing thread tension control device |
| JP3729717B2 (en) * | 2000-08-28 | 2005-12-21 | ペガサスミシン製造株式会社 | Double chain stitch machine |
| JP2013123606A (en) * | 2011-12-16 | 2013-06-24 | Aisin Seiki Co Ltd | Needle thread tension adjusting device for sewing machine |
| CH709666A1 (en) * | 2014-05-16 | 2015-11-30 | Bernina Int Ag | Apparatus and method for influencing a position of nodes between the upper and lower threads for sewing with a sewing machine. |
| WO2018059738A1 (en) * | 2016-09-30 | 2018-04-05 | Adient Luxembourg Holding S.à.r.l. | Device and method for automatically stabilising the thread tension in sewing machines, and sewing machine comprising this device |
| CN108505234A (en) * | 2018-06-16 | 2018-09-07 | 无锡品益缝纫机有限公司 | A kind of sewing machine take-up structure |
| CN212895340U (en) * | 2020-09-15 | 2021-04-06 | 西安标准工业股份有限公司 | Intelligent facial line tension adjusting device |
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Denomination of invention: An intelligent thread tension balancing device and sewing machine Effective date of registration: 20231218 Granted publication date: 20220621 Pledgee: CITIC Bank Limited by Share Ltd. Shanghai branch Pledgor: HIKARI (SHANGHAI) PRECISE MACHINERY SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2023310000877 |
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