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175results about "Tensioning devices" patented technology
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Robot and method for adjusting sewn threads
Embodiments of present disclosure relate to a robot and a method for adjusting sewn threads. The robot includes a robotic arm configured to hold an adjusting tool, and a controller configured to cause the adjusting tool to partially go across a thread section along a path defined between a bottom side of the thread section and an outer surface of an object. The sewn threads have a first end fixed to the object and a second end, a plural of stitches formed across a sewing zone on the object between the first end and the second end, and each stitch has the thread section including a top side and the opposite bottom side. Then the adjusting tool moves upward away from the outer surface so as to adjust pitches between the stitches.
Owner:ABB (SCHWEIZ) AG
Right thread hook of sewing machine, thread passing mechanism, sewing machine and upper thread track of right thread hook
The invention provides a sewing machine right thread hook, a thread passing mechanism, a sewing machine and a right thread hook upper thread track, the sewing machine right thread hook comprises a fixing portion and a guiding portion, the guiding portion is slidably connected to the fixing portion, an upper thread is arranged in the guiding portion in a penetrating mode, and the guiding portion can slide on the fixing portion along with the upper thread to enable the upper thread to be in a low-tension position. The guide part is connected to the fixing part in a sliding mode, so that the thread containing range of the thread passing part comprises the movement range of the thread clamping face of the large thread clamping device and the movement range of the thread passing hole of the take-up lever, when sewing work is carried out, the guide part can slide on the fixing part along with an upper thread, the upper thread is made to be located at the low-tension position all the time, the change amplitude of tension is reduced, and sewing efficiency is improved. And the problems of line throwing and line breaking are avoided.
Owner:JACK SEWING MASCH CO LTD
Sewing machine with gear adjustment and free adjustment functions
The invention discloses a sewing machine with gear adjustment and free adjustment functions, and belongs to the technical field of sewing machines. The gear thread clamping device is mounted on one side of the rack and is used for applying clamping force which changes intermittently to the sewing thread; the free thread clamping device is mounted on one side of the rack and used for applying continuously changing clamping force to the sewing thread; and the switching adjusting mechanism is installed at the top end of the rack, the switching adjusting mechanism is connected with the gear thread clamping device and the free thread clamping device, and the switching adjusting mechanism can enable the gear thread clamping device and the free thread clamping device to alternately clamp the sewing thread. By means of the time division principle, a user can directly switch and use the fabric conforming to the preset clamping force for sewing, and when the user cannot find the preset gear conforming to the fabric, free adjustment of the sewing thread clamping force can be achieved through the free thread clamping device, so that the adjustment efficiency of the sewing thread clamping force is improved, and the user experience is improved. And the dependence on the experience level of debugging personnel is reduced.
Owner:ZHEJIANG JACK SMART SEWING TECHNOLOGY CO LTD
Sewing head
PCT designated stageWO2025222138A1Programme-controlled sewing machinesWorkpiece holdersMechanical engineeringPhysics
A composite sewing head, including: a needle bar transport for a thread feed needle and a thread catcher needle that is arranged to be parallel to a needle plane of the thread feed needle and a thread catcher needle, with the needle plane parallel or nearly parallel to a stitch path.
Owner:INTEVA PRODUCTS LLC
Active tension control device and control method for unilateral sewing thread of composite prefabricated body
PendingCN121047049ATensioning devicesMechanical pressure/force controlControl engineeringElectric machinery
The invention discloses an active tension control device and control method for a unilateral sewing thread of a composite preform, and the device comprises a tension control drive unit, a sensing monitoring unit, a thread guide unit and a thread consumption unit, and the tension control drive unit comprises a tension control motor and a thread roller; the sensing monitoring unit comprises a tension sensor, a laser distance measuring sensor and a sewing action driving encoder, the thread guide unit mainly assists in transferring a sewing thread from a thread releasing area to a working area and comprises a thread guide wheel and a porcelain eye, and the thread consumption unit is a sewing working area. According to the control method, the speed control ring and the tension control ring jointly achieve tension control, the speed control ring combines the rotating speed of a real-time sewing action driving motor and the diameter of a real-time thread roller to achieve coarse adjustment, and then closed-loop real-time tension adjustment is achieved through the controller. By means of the active tension control method and device for the single-side sewing thread of the composite prefabricated body, active control over the sewing tension can be achieved, and the sewing quality of the prefabricated body is effectively improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Self-adaptive adjustment method for thread tension of flatcar sewing machine
The invention relates to the technical field of thread tension adjusting control, in particular to a thread tension self-adaptive adjusting method of a flat sewing machine. Current and historical line tension time sequence data are obtained, and data support is provided for adjustment. By comparing the difference between the current tension and the historical preset tension, a tension deviation index is determined, and abnormal fluctuation is found preliminarily. Thirdly, comparing the numerical difference of the tension time sequence data of each line and the change along with time, determining a tension characteristic value, and reflecting the tension change condition; and integrating the current deviation index and the deviation of all the tension characteristic values to obtain a current tension adjustment degree value so as to realize comprehensive evaluation. In order to achieve more accurate adjustment, the current adjustment value is adjusted based on the deviation index and the adjustment degree value of the historical monitoring period to obtain a new value, so that the adjustment is more continuous and stable. Finally, according to the new adjustment value, the current preset tension and the historical preset tension, the self-adaptive tension value of the next period is determined, dynamic and self-adaptive adjustment is achieved, and the accuracy is improved.
Owner:MAYANG SENJIA LUGGAGE CO LTD
Take-up device of sewing machine
The utility model discloses a take-up device of a sewing machine, which comprises a machine head, a take-up device is arranged on the machine head, the take-up device comprises a mounting frame, a motor, a rotating frame and a thread trapper, the mounting frame is fixed on the machine head, the motor is mounted on the mounting frame, and a motor shaft of the motor penetrates through the mounting frame and the rotating frame to be fixedly connected with the motor shaft; the yarn trapper comprises a push rod, an installation part, a spring, a fixing cap and a clamping piece assembly, the yarn trapper is installed on the rotating frame, the push rod is installed in a sliding mode relative to the installation part, a jacking inclined table is arranged on the installation frame, and the motor drives the yarn trapper on the rotating frame to rotate, so that the push rod correspondingly abuts against or is away from the jacking inclined table. When the sewing machine is used for thread drawing, the thread take-up device can be well matched with the sewing machine to work and quickly act, and is timely matched with other devices to press threads, so that the sewing machine can better draw the threads, the technical defects existing in an existing structure are overcome, and the thread residue phenomenon of a bird nest is effectively prevented.
Owner:ZHEJIANG MAQI SEWING MACHINE
Overcasting sewing machine
To adjust thread delivery amount between an upper looper thread T3 and a lower looper thread T4 and individually adjust thread tension so that the upper looper thread T3 and the lower looper thread T4 do not restrict each other.SOLUTION: An overcasting sewing machine 100 comprises: a first input part 32 to move a needle thread adjusting part 24 along an intersection direction; a second input part 33 to interlock and move an upper looper thread adjusting part 25 and a lower looper thread adjusting part 26 along the intersection direction; an adjustment interlocking part 27 to interlock the upper looper thread adjusting part 25 and the lower looper thread adjusting part 26 during movement of the needle thread adjusting part 24; and a third input part 37 to input adjustment of relative positions along the intersection direction of a thread locking part 251 of the upper looper thread adjusting part 25 and a thread locking part 261 of the lower looper thread adjusting part 26 while allowing interlocking by the second input part 33 and the adjustment interlocking part 27.SELECTED DRAWING: Figure 16
Owner:JUKI CORP
Device and method for thread drawing
A thread drawing device includes a drive assembly which includes a drive wheel that has a working platform for supporting a thread, the thread has a fixed end fixed on an object and a movable end carried by a tool. The thread drawing device includes a pressing assembly which includes a pressing member configured to move between a first position at which the pressing member engages the working platform to clamp the thread to be pulled therebetween and a second position at which the pressing member disengages from the working platform to release the thread to be pulled. The thread drawing device includes a motor configured to rotate the drive wheel when the pressing member is at the first position so as to move a loose part of the thread at the fixed end from the fixed end to the movable end.
Owner:ABB (SCHWEIZ) AG
Automatic control method for take-up tension of template machine
PendingCN120719467AProgramme-controlled sewing machinesTensioning devicesTextile technologyAutomatic control
The invention discloses an automatic take-up tension control method of a template machine, and belongs to the technical field of textile. The invention aims to solve the problems of low tension control precision and poor adaptability caused by insufficient nonlinear interference compensation, lack of multi-working-condition collaborative analysis and high manual dependency in the prior art. According to the method, the cloth thickness is collected in real time through a thickness sensor, and a yarn consumption predicted value is output through a core model in combination with the stitch length; the AI module feeds back dynamic optimization model parameters based on the broken line record and the stitch tightness, and generates accurate line consumption; a servo motor is driven on the basis of the difference between the value and the standard quantity, and the rotation angle of the motor is converted into the angular displacement of the take-up-lever through a four-bar mechanism composed of a coupler, an eccentric shaft and the take-up-lever. By combining closed-loop feedback of a displacement sensor and spindle phase collaboration and integrating AI anomaly diagnosis, a self-optimization system driven by historical data is constructed, and tension stability and stitch quality under complex working conditions are continuously improved.
Owner:BULLMER ELECTROMECHANICAL TECH
Anti-nest thread bonding device and sewing machine
The utility model discloses an anti-nest thread bonding device and a sewing machine in the technical field of sewing machines. The anti-nest thread bonding device comprises an auxiliary thread trapper. The connecting end of the wire bonding plate is connected with the auxiliary wire clamping device, and the wire bonding end of the wire bonding plate and the auxiliary wire clamping device can rotate relative to each other; the wire bonding driving assembly is arranged on one side of the auxiliary wire clamping device, and the wire bonding driving assembly is provided with a wire bonding iron core shaft capable of axially moving in a reciprocating mode; the connecting rod is arranged between the wire bonding plate and the wire bonding driving assembly, one end of the connecting rod is hinged to the wire bonding iron core shaft, and the other end of the connecting rod is hinged to the wire bonding plate, so that the wire bonding end of the wire bonding plate is driven to swing through axial movement of the wire bonding iron core shaft. The thread bonding mechanism not only realizes the thread bonding action and prevents the generation of bird nests, but also has the advantage of simple structure, simultaneously avoids the problem that the hand is blocked by the operation space of the machine head, and enables the sewing machine to have a neat appearance.
Owner:JACK SEWING MASCH CO LTD
Thread loosening mechanism of sewing machine and sewing machine thereof
Owner:ZHEJIANG MAQI SEWING MACHINE
Wire tension adjusting device and method for multiple wire trappers
The invention relates to the technical field of sewing machines, in particular to a multi-thread-trapper thread tension adjusting device which is characterized in that a driving motor drives a rotating shaft to rotate; the plurality of adjusting mechanisms are arranged in one-to-one correspondence with the adjusting nuts of the plurality of wire trappers; the adjusting mechanism comprises a friction wheel arranged opposite to the adjusting nut, a transmission piece connected with the rotating shaft and the friction wheel so as to drive the friction wheel to rotate, and a clutch piece connected with the friction wheel and driving the friction wheel and the adjusting nut to be pressed or not pressed. The invention further relates to a multi-yarn-trapper yarn tension adjusting method which adopts the device and comprises automatic adjustment and manual adjustment. The automatic adjustment is that the adjusting nuts of all the wire trappers or one or more of the wire trappers are compressed with the friction wheel, the driving motor drives the friction wheel to rotate through the rotating shaft and the transmission piece, and the friction wheel compressed with the adjusting nuts drives the adjusting nuts to rotate; the manual adjustment is that the adjusting nut of the wire clamp and the friction wheel are not tightly pressed, and the adjusting nut is manually rotated. Automatic synchronous or independent adjustment of the tension of the multi-thread-trapper thread can be achieved.
Owner:JACK SEWING MASCH CO LTD
Template machine
The invention relates to a template machine, and belongs to the technical field of sewing equipment, the template machine comprises a central shaft, a guide pipe, an upper joint and a lower joint, the central shaft is internally provided with an air channel and a thread channel, the side surface of the central shaft is provided with an air inlet part and an air outlet part, the central shaft penetrates through the central channel, the upper joint is provided with a first interface, and the central shaft is sleeved with the upper joint in a sealing manner; the first interface is communicated with the air inlet part; the second joint is provided with a second interface, the second joint is arranged on the central shaft, and the second interface is communicated with the air outlet part; the thread coil is arranged on the cantilever, and a sewing thread enters the thread channel from the upper part of the machine head; the guide pipe is arranged in the machine head and connected with the central shaft, and the lower end of the guide pipe extends to the side face of the machine head; according to the template machine, an integrated solution of power supply, air supply and thread supply of the rotating machine head is provided, the sewing speed and the sewing effect are improved, the assembly structure is simpler, the needed assembly space is smaller, the cost is lower, and the market requirement is better met.
Owner:SICHUAN KISAE SEWING MASCH CO LTD
Thread loosening and presser foot lifting mechanism of sewing machine and sewing machine
This invention relates to the field of sewing machine technology, and discloses a thread-releasing and presser foot lifting mechanism for a sewing machine and a sewing machine. The mechanism includes a thread-releasing assembly for opening the thread clamp and a presser foot lifting assembly. The thread-releasing assembly includes a top plate rotatable around a pivot and a thread-releasing pin. The top plate is driven to rotate around the pivot by the presser foot lifting assembly, thereby causing the thread-releasing pin to open the thread clamp and perform a thread-releasing action. The presser foot assembly includes a presser foot rod and a presser foot. The presser foot lifting assembly includes an adjusting block fixedly mounted on the presser foot rod and a manual presser foot lifting component. A toggle block is provided on the rear side of the adjusting block. The presser foot assembly also includes an adjusting component for adjusting the presser foot lifting height and pressure. By using the top plate and the thread-releasing pin, when the presser foot is lifted by the presser foot lifting assembly, it is driven to rotate around the pivot, thereby causing the thread-releasing pin to open the thread clamp and perform a thread-releasing action. This ensures that the thread clamp automatically completes the thread-releasing action during the presser foot lifting process, thus simplifying the structure and improving working accuracy.
Owner:ZHEJIANG NANYUAN SEWING EQUIPMENT CO LTD
An intelligent carbon fiber electric heating cloth automatic pressing machine
The present invention discloses an intelligent carbon fiber electric heating cloth automatic pressing machine, comprising a frame, a platform is provided at the lower end of the frame, a movable fixing device for tensioning and fixing the carbon fiber electric heating cloth is installed on the upper surface of the platform, a sewing device for sewing and fixing the heating wire is installed on the frame, a suture shaft and a heating wire shaft are installed on the top of the frame, the sewing device comprises a sewing assembly and a cutting assembly, the suture of the suture shaft and the heating wire of the heating wire shaft are respectively connected to the sewing assembly, and a cutting assembly for the carbon fiber electric heating cloth is installed on the side of the sewing assembly. The beneficial effect of the present invention is that the movable fixing device for fixing the carbon fiber electric heating cloth, the sewing assembly for sewing and fixing the heating wire, the cutting assembly for cutting the electric heating wire, and the cutting assembly for cutting the carbon fiber electric heating cloth are integrated in the press machine, so that multiple processes are integrated, the functions are diverse, and the processing effect is good.
Owner:CASSINI (LISHUI) INTELLIGENT TECHNOLOGY CO LTD
Thread loosening device for sewing machine
ActiveCN222455477UImprove operational convenienceImprove operation accuracyTextile disintegration and recoveryTensioning devicesTime controlSewing machine
The utility model discloses a thread loosening device for a sewing machine, which relates to the technical field of sewing machines and comprises a bottom plate, a support plate fixedly arranged at the top of the bottom plate, a transverse plate fixedly arranged at the upper end of the support plate, a fixing plate fixedly arranged on the outer wall of the transverse plate, a push rod slidably arranged in the fixing plate in a penetrating manner, and a thread trapper fixedly arranged at the end of the push rod. The rod wall of the push rod is sleeved with a first spring, the two ends of the first spring are fixedly connected with the fixed plate and the push rod correspondingly, a first supporting rod is fixedly arranged at the middle end of the outer wall of the supporting plate, the rod wall of the first supporting rod is rotationally sleeved with a push plate, and a movable plate is arranged between the push plate and the push rod; and a thread loosening pushing mechanism is arranged between the vertical plate and the movable plate. According to the bottom plate, the supporting plate, the transverse plate, the vertical plate, the first supporting rod, the push plate, the thread clamping device, the push rod, the movable plate and the pushing thread feeding mechanism, thread loosening can be adjusted to different degrees only through single-time control, and the operation convenience of the thread loosening device in the sewing machine is improved.
Owner:ZHEJIANG SIBYER SEWING MASCH CO LTD
Thread tension adjusting device and method for multiple thread trappers
The invention relates to the technical field of sewing machines, in particular to a thread tension adjusting device for multiple thread trappers, a driving motor drives a transmission mechanism to drive an adjusting motor to linearly move along the arrangement direction of the multiple thread trappers, the adjusting motor drives a friction wheel to rotate, and a clutch drives the friction wheel to be compressed or not compressed with adjusting nuts of the thread trappers. The invention further relates to a thread tension adjusting method of the multi-thread trapper, and the thread tension adjusting method adopts the device and comprises automatic adjustment and manual adjustment. The automatic adjustment is that an adjusting motor is opposite to a certain wire clamp, a friction wheel and an adjusting nut of the friction wheel are pressed tightly, and the adjusting motor drives the friction wheel to drive the adjusting nut to rotate; the manual adjustment means that the adjusting motor is not opposite to the wire trapper to be manually adjusted, or the friction wheel is not tightly pressed with an adjusting nut of the wire trapper to be manually adjusted, and the adjusting nut is manually rotated. And automatic and high-precision adjustment of the tension of the threads of the multiple thread trappers can be realized.
Owner:JACK SEWING MASCH CO LTD
Multifunctional garment sewing machine
The utility model discloses a multifunctional garment sewing machine, which belongs to the technical field of multifunctional sewing machines and comprises an operating table, a sewing machine body fixedly connected to the upper end of the operating table, an amplifying mechanism fixedly connected to the rear end of the sewing machine body, and an operating mechanism fixedly connected to the front end of the sewing machine body. The left end of the sewing machine body is fixedly connected with the thread cutter, the inner surface of the lower end of the sewing machine body is fixedly connected with the illuminating lamp, the upper end of the operation table top is fixedly connected with the material rolling mechanism, and through the amplifying mechanism, when a user sews, the sewing position can be amplified, so that the sewing machine can be suitable for different users; according to the sewing machine, the material rolling mechanism and the material rolling assembly are matched, in the sewing process, rolling can be conducted while sewing is conducted, the space of the operation table top is better utilized, the functions of enlarging the sewing position and rolling clothes can be achieved, and the practicability of the sewing machine is improved.
Owner:SHUCHENG COUNTY YIGE CLOTHING CO LTD
Overedger thread take-up and thread trapper dynamic adjusting device and overedger
The invention discloses an overlock machine thread take-up and thread trapper dynamic adjusting device and an overlock machine, and relates to the technical field of sewing. The technical problems that in the prior art, when thin fabric is sewed by an overlock machine, the fabric wrinkles due to the fact that the tension of machine needles and threads is too large are solved, and meanwhile it is guaranteed that stitches are compact and attractive are solved. The adjusting device comprises a machine shell, a take-up lever, a main shaft and a machine needle thread trapper, the machine needle thread trapper comprises a thread trapper shaft and is provided with a machine needle thread trapper dynamic adjusting mechanism, and the machine needle thread trapper dynamic adjusting mechanism comprises a double-spring structure arranged on the thread trapper shaft in a sleeving mode; the rotating shaft is linked with the main shaft; the eccentric wheel is arranged on the rotating shaft; the sliding rod assembly is connected with the eccentric wheel and the yarn trapper shaft; an external thread adjusting structure is arranged at the front end of the yarn trapper shaft; when the main shaft rotates, the eccentric wheel and the sliding rod assembly enable the pressure of the thread trapper to be increased in the needle stabbing stage and decreased in the needle ascending stage. The adjusting device has the advantages that the thin fabric is effectively prevented from wrinkling during sewing, and meanwhile, the stitch can be kept compact and attractive.
Owner:JACK SEWING MASCH CO LTD
A thread feeding device for a sewing machine
The utility model relates to sewing machine technical field discloses a thread unwinding device for sewing machine, including mounting panel, the first threaded rod that has the screw engagement in mounting panel, the bottom fixed mounting of first threaded rod has first knob, this thread unwinding device for sewing machine, rotates first knob to make first threaded rod drive fixed plate to move upwards to make fixed plate and mounting panel cooperation to install thread unwinding device, the friction layer that is provided on fixed plate simultaneously, therefore this can better increase the friction between fixed plate and sewing machine desktop, after rotating third knob to make bidirectional threaded rod rotate, when bidirectional threaded rod rotates can drive moving block to adjust distance in the sliding slot to make the tension of guide coil to sewing thread unwinding to adjust to can better prevent thread unwinding device sewing thread tight or too loose when unwinding appears the situation, and influence the sewing effect of sewing machine.
Owner:ANSHAN LONGMIAN HOME TEXTILE
Sewing thread clamping device of sewing machine
The utility model discloses a sewing thread clamping device of a sewing machine. The sewing thread clamping device comprises a driving motor, a buffering piece, a connecting rod, a pull rod, a thread clamping piece and a fixing block. The driving motor is connected with a fixed shaft sleeve, the connecting rod is linked with the fixed shaft sleeve, the buffer piece is respectively connected with the connecting rod and the fixed shaft sleeve, the other end, far away from the fixed shaft sleeve, of the connecting rod is movably connected with one end of the pull rod, and the other end of the pull rod is connected with the thread clamping sheet; the thread clamping piece comprises a thread clamping connecting part and a thread clamping clamping part, a rotating shaft is arranged between the thread clamping connecting part and the thread clamping clamping part, the fixing block is arranged below a machine needle and is adjacent to the thread clamping piece, and the thread clamping clamping part rotates around the rotating shaft and abuts against the fixing block to clamp a sewing thread. According to the utility model, the sewing stability can be effectively improved, and the sewing off-line and bird nest phenomena are reduced.
Owner:ANHUI JIEYU SHOEMAKING MACHINERY TECH CO LTD
Integrated thread trapper and sewing machine
The utility model discloses an integrated thread trapper and a sewing machine in the technical field of sewing machines. The integrated thread trapper comprises a thread passing plate, an outer switching sleeve and an inner switching shaft. An outer reset spring and an inner reset spring are arranged on one side of the wire passing plate, the outer switching sleeve is in sliding connection with the wire passing plate in the axis direction, the inner reset spring is connected between the wire passing plate and the outer switching sleeve, the inner switching shaft is sleeved with the outer switching sleeve in an axial moving mode, and the outer reset spring is connected between the wire passing plate and the inner switching shaft; a thread clamping piece, an outer supporting pad and an inner supporting pad are arranged on the other side of the thread passing plate, the thread clamping piece and the outer supporting pad are arranged on the outer switching sleeve in a sleeving mode, and the inner supporting pad is arranged on the inner switching shaft in a sleeving mode. According to the sewing machine clamping device, free adjustment and gear adjustment of the sewing thread clamping force are achieved, a user can directly use fabric conforming to the preset clamping force for sewing according to needs, the clamping force of the clamping device can also be freely adjusted, and the adjusting efficiency of the sewing thread clamping force is improved.
Owner:ZHEJIANG JACK SMART SEWING TECHNOLOGY CO LTD
Thread clamping and cutting device and sewing machine
The application discloses a thread clamping and cutting device and a sewing machine, which comprises a mounting seat, a sliding plate, a thread clamping plate, a thread cutting plate, a transmission plate and a driving rod. The mounting seat is fixed to the sewing machine and located below a needle plate. The sliding plate is movably connected to the mounting seat. The thread clamping plate is installed on the sliding plate. The thread cutting plate is installed on the sliding plate. The transmission plate is connected with the thread clamping plate and the thread cutting plate. The driving rod is connected with the transmission plate. The driving rod drives the transmission plate to move. In the process that the driving rod moves from the first end to the second end of the stroke, the thread clamping plate, the thread cutting plate and the sliding plate are sequentially driven to move to realize the actions of clamping the sewing thread, cutting the sewing thread and moving the sliding plate from the initial position to the avoiding position in the moving direction of the driving rod. By sequentially clamping and cutting the sewing thread, the stability of the sewing hooking thread can be ensured, so that the occurrence of the bird nest is reduced. After the thread is cut, the sliding plate moves to the avoiding position to avoid the interference caused by the moving cutter below the needle plate.
Owner:BULLMER ELECTROMECHANICAL TECH
Flat seaming machine
The utility model belongs to the technical field of sewing machines, and particularly relates to a flat seaming machine. Comprising a rotary driving part, a presser foot lifting driving assembly, a thread trimming driving assembly and a stitch length adjusting driving assembly, the rotary driving part comprises a rotary part, and a presser foot lifting cam, a thread trimming cam and a stitch length adjusting cam are arranged on the rotary part; the presser foot lifting cam, the thread trimming cam and the stitch length adjusting cam respectively drive the presser foot lifting driving assembly, the thread trimming driving assembly and the stitch length adjusting driving assembly to execute presser foot lifting, thread trimming and stitch length adjusting actions without mutual interference; according to the utility model, the rotary driving piece is combined with the position relation of the stitch length adjusting cam, the thread trimming cam and the presser foot lifting cam, so that the execution of stitch length adjusting, thread trimming, thread loosening and presser foot lifting actions is realized without mutual interference, the structure is compact and simplified, the number of parts is reduced, and the part cost is reduced.
Owner:ZHEJIANG HOVER TECH SEWING MACHINE CO LTD
Pressure foot lifting air suction thread clamping device of flat seaming machine
The invention discloses a flat seaming machine presser foot lifting air suction thread clamping device and aims to provide a flat seaming machine presser foot lifting air suction thread clamping device which is simple in structure and convenient to manufacture. The presser foot lifting air suction thread clamping device of the flat seaming machine can effectively solve the problem that after the flat seaming machine cuts threads every time, when sewing is started next time, due to the fact that the thread clamping force of upper threads is insufficient, the sewing is prone to loosing. The device comprises a fixed part which is fixedly arranged on a machine head of the flat seaming machine and comprises a fixed thread pressing part which is located between a sewing needle and a presser foot rod of the flat seaming machine; the air suction pipe comprises an air suction port which is located between the sewing needle and the fixed thread pressing part; the elastic element is arranged on the fixed part and comprises an elastic arm and a thread pressing part arranged on the elastic arm, the thread pressing part and the sewing needle are located on the same side of the fixed thread pressing part, and the thread pressing part abuts against the fixed thread pressing part under the action of the elastic arm; the push plate is fixed on the presser foot rod; when the presser foot rod drives the presser foot to ascend, the push plate abuts against the elastic arm and enables the line pressing piece to be separated from the fixed line pressing part.
Owner:JACK SEWING MASCH CO LTD
Method for controlling thread end stability during thread trimming and sewing machine
The invention provides a control method for thread end stability during thread trimming and a sewing machine. The sewing machine comprises a main shaft, a control assembly, a thread bonding mechanism, a main thread clamping device, a thread take-up lever and a machine needle, and the control assembly is connected with the thread bonding mechanism and the main thread clamping device; the upper thread penetrates through the thread bonding mechanism and then penetrates through a needle hole of the machine needle through the main thread clamping device and the thread take-up lever. According to the control method for the stability of the thread end in the thread trimming process and the sewing machine, the thread bonding mechanism and the main thread clamping device are arranged, before thread trimming, the main thread clamping device clamps the upper thread, meanwhile, the thread bonding mechanism works, and therefore the thread bonding mechanism can draw the thread from the thread frame. When the thread is trimmed, the main thread clamping device loosens the upper thread, the thread amount pre-stored at the position of the thread bonding mechanism is extracted in the ascending process of the take-up lever, the upper thread cannot be extracted from the position of the machine needle, and therefore it can be guaranteed that the length of the thread end remaining on the machine needle after thread trimming is close to a set value.
Owner:JACK SEWING MASCH CO LTD
Electromagnetic auxiliary thread trapper and sewing machine
The utility model discloses an electromagnetic auxiliary thread trapper and a sewing machine in the technical field of sewing machines, and the electromagnetic auxiliary thread trapper comprises an electromagnet, a thread clamping piece, an adjusting check block, a spring, a knob and an installation mandrel, a magnet cover plate is installed at one end of the electromagnet, and an iron mandrel capable of moving axially is arranged in the electromagnet; one end of the mounting core shaft axially penetrates through the magnet cover plate and is fixedly connected with the iron core shaft; the two thread clamping pieces sleeve the mounting mandrel face to face, the knob is fixedly connected with the other end of the mounting mandrel, and the spring is mounted between the knob and the thread clamping pieces; and the adjusting stop block is fixedly mounted on the mounting mandrel and is positioned between the knob and the thread clamping sheet. The thread trapper not only has the thread clamping function of a mechanical thread trapper, but also can change the clamping force to the sewing thread through the electromagnet, so that the automatic adjustment of the clamping force to the sewing thread by the thread trapper is realized.
Owner:JACK SEWING MASCH CO LTD
Thread tension adjusting device and sewing machine
The invention discloses a thread tension adjusting device and a sewing machine, relates to the technical field of sewing equipment, and aims to solve the problems that an existing electromagnet-driven thread tension adjusting device is low in response speed, thread tension is reduced due to long-time operation, and the thread loosening speed lags behind. The motor is arranged on one side of the supporting structure; the wire clamping mechanism and the motor are oppositely arranged on the other side of the supporting structure, the wire clamping mechanism comprises a cam and a wire passing wheel, the cam is connected with a motor shaft of the motor, and the outer edge of the cam is attached to a wire passing groove of the wire passing wheel; by means of the arrangement, high-precision, quick-response and long-term stable thread tension control is achieved through motor driving, meanwhile, the thread loosening performance is optimized, and the overall performance of the sewing machine is remarkably improved.
Owner:BULLMER ELECTROMECHANICAL TECH
Line tension adjustment device
The present application relates to sewing technical field, especially a kind of thread tension adjusting device, comprising: thread clamping mechanism, including mounting block and the first thread clamping piece and second thread clamping piece movably arranged on the mounting block, the first thread clamping piece is oppositely arranged with the second thread clamping piece and has the gap for accommodating suture;Driving mechanism, including rotating member, transmission assembly and pressure cylinder, one end of the transmission assembly is connected with the rotating member, the other end is connected with the pressure cylinder, the side of the pressure cylinder close to the transmission assembly is abutted with the second thread clamping piece, by driving the rotating member rotates, can make the transmission assembly drive the pressure cylinder moves, to make the second thread clamping piece relatively the first thread clamping piece moves. Only need to control the rotation angle of rotating member can control the gap size between two thread clamping pieces, in turn change the size of thread tension, the whole process can be adjusted thread tension in real time during sewing machine sewing process, adjustment is simple and convenient, higher accuracy.
Owner:SHANGHAI FUSHAN PRECISE MASCH TECH CO LTD