34results about "Take-up devices" patented technology

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.

The present invention addresses the problem of preventing hitch stitches caused by lower thread factors. A needle plate (19) has a needle hole (19a) and a guide hole (31) that communicates with the needle hole. The guide hole is offset toward a front surface of a sewing machine and is also offset in the rotation direction of a bobbin case from the line of vertical movement of a sewing needle. The needle plate also has a groove part (32) that extends from the guide hole (31) in front of the needle hole in the direction opposite the rotation direction of the bobbin case. The top of the groove part and the portion of the groove part that leads to the guide hole are open, and the remainder of the groove part is a bottom surface and a side wall. During a sewing operation, a lower thread that protrudes from the bobbin case extends upward through the needle hole or the guide hole. Depending on the movement direction of a holder (a frame 5) for an article to be sewed, the lower thread passes through the guide hole and is guided to the front side of the needle hole via the groove part. The bottom surface of the groove part is closed, which prevents an upper thread loop that rises along the lower thread from catching on the groove part.

The utility model provides a variable thread quantity take-up auxiliary device, which relates to the technical field of clothing sewing, and comprises a driver, a transmission connecting rod, a slide block and a guide member, during working, the driver drives the slide block to do reciprocating translational motion along the guide member through the transmission connecting rod, the guide member is provided with a chute, and the slide block does linear displacement along the chute; the sliding block is provided with a movable thread passing hook, the movable thread passing hook can move horizontally along with the sliding block, the movable thread passing hook pulls a thread to move, the position of the thread is changed by changing the position of the movable thread passing hook, the position state of the thread is changed, and the thread supply amount is adjusted.

The present invention aims to avoid occurrence of a hitch stitch caused by a lower thread. A needle plate (19) has a needle hole (19a) and a guide hole (31) communicating with the needle hole. The guide hole is located near a front side of a sewing machine and positionally deviated from an up-down movement trajectory of a sewing needle in a rotating direction of a rotary hook. Further, the needle plate has a groove (32) formed in front of the needle hole and extending from the guide hole (31) in a direction opposite to the rotating direction of the rotary hook. While the groove is open upward and at its portion leading to the guide hole, the other portions of the groove are defined by a bottom surface and side walls. In a sewing operation, a lower thread moved out of the rotary hook extends upward through the needle hole or the guide hole. Depending on a direction in which a holding member (frame 5) holding a sewing workpiece moves, the lower thread passes through the guide hole to be guided to the front of the needle hole via the groove. Because the groove is closed at the bottom surface, an upper thread loop moving upward along the lower thread can be prevented from getting caught in the groove.

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.

The technical scheme belongs to the technical field of template machines, and particularly relates to a needle rod device of a template machine, which comprises a rack, a needle rod, a needle head, a needle rod, a needle rod and a needle rod, the displacement mechanism is arranged on the machine frame, the displacement mechanism comprises a displacement driving part and a needle rod connector arranged at the output end of the displacement driving part, the front end of the needle rod connector is arranged outside the machine needle rod in a sleeving mode, and the displacement driving part drives the machine needle rod to move in a reciprocating mode in the needle inserting direction through the needle rod connector; the rotating mechanism is arranged on the machine frame, the rotating mechanism comprises a rotating driving part, the machine needle rod is arranged at the output end of the rotating driving part, and the rotating driving part is used for driving the machine needle rod to rotate with the axis of the machine needle rod as the center.

The invention discloses a speed-reduction-controlled thread take-up mechanism and a sewing machine, and relates to the technical field of sewing machines, the speed-reduction-controlled thread take-up mechanism comprises a base, a main shaft, a thread bonding cam and a speed reduction assembly, the main shaft is rotationally matched on the base, the thread bonding cam is rotationally matched on the base, and a groove is formed in the side wall of the thread bonding cam; the speed reduction assembly is arranged between the spindle and the routing cam, the spindle drives the routing cam to rotate through the speed reduction assembly, and the rotating speed of the routing cam is lower than that of the spindle. According to the take-up mechanism with the speed reduction control function and the sewing machine, the low rotating speed of the thread bonding cam can be kept under the high-speed sewing condition, and then the thread supply stability is kept.

The invention discloses a method for sewing high-density cloth thread throwing prevention and a sewing device, flexible thread supply is used, a thread supply amount curve envelops a thread demand amount curve, and the method comprises the following steps: setting a main shaft rotation angle phi, enabling a peak value of the thread supply amount curve to move rightwards, and enabling the peak value height fluctuation to be less than + / -10%; the sewing equipment comprises a flexible thread supply device, and the thread throwing prevention method for sewing the high-density cloth is adopted.

The invention discloses a thread bonding mechanism and a sewing machine, the thread bonding mechanism comprises a first fixing piece, a pressing rod sliding block, a thread passing assembly and a driving shaft, the pressing rod sliding block is movably connected to the first fixing piece through a first guide mechanism, the pressing rod sliding block can move in the height direction, the pressing rod sliding block is provided with an inclined surface, and the inclined surface is provided with a thread passing hole; an angle is formed between the inclined plane and the height direction; the wire passing assembly comprises a second fixing piece connected to the shell, a guide rod which is connected to the second fixing piece and can horizontally move relative to the second fixing piece, a roller which is connected to one end of the guide rod and abuts against the inclined face, and a wire passing device connected to the other end of the guide rod. The driving shaft is in transmission connection with the pressing rod sliding block through a transmission assembly, and the driving shaft can drive the pressing rod sliding block to move in the height direction when rotating around the axis of the driving shaft, so that the inclined face pushes the guide rod to horizontally move, and the thread passing device is driven to horizontally move so as to pull a thread penetrating through the thread passing device. The problem that the thread amount and the cloth thickness are not matched can be effectively solved.

The utility model belongs to the technical field of sewing machines. The problem that in the prior art, threading and removing of a covering thread are difficult is solved. The thread passing structure of the sewing machine comprises a first thread passing hole formed in a thread passing frame and a second thread passing hole formed in a supporting frame, a rocker arm frame is connected with a thread bonding plate with a third thread passing hole, and a machine shell is further connected with a tensioning frame with a fourth thread passing hole. The first thread passing hole, the third thread passing hole, the second thread passing hole and the fourth thread passing hole are sequentially distributed from top to bottom, the fourth thread passing hole, the third thread passing hole, the second thread passing hole and the first thread passing hole are sequentially distributed from left to right, and the first thread passing hole is formed in the front-back direction of the sewing machine. The second thread passing hole and the third thread passing hole are formed in the left-right direction of the sewing machine, and the fourth thread passing hole is formed in the up-down direction of the sewing machine. The utility model has the advantage of greatly facilitating the threading and removing operation of the covering thread.

The double-needle mechanism comprises two needle rod supports, a sliding support and a support shaft. Each needle rod support is independently provided with a needle rod slidingly installed thereon. The two needle rods are respectively connected with a machine needle at one end of the corresponding needle rod support. The support shaft is connected with the two needle rods and can drive the two machine needles to make reciprocating movement relative to the needle rod support along the axial direction of the needle rod. The two needle rod supports are slidingly installed on the sliding support so that the distance between the two needle rod supports can be adjusted by sliding the two needle rod supports on the sliding support. The double-needle mechanism can adjust the distance between the two needle rod supports, i.e. the needle position, to meet the requirements of different garment processes and avoid the problems caused by replacing the machine needle.

The present invention discloses a thread taking-up mechanism of a sewing machine, the technical scheme of which includes a main shaft and a casing on a sewing machine body, a thread taking-up rod and a needle bar being arranged on the main shaft, the thread taking-up rod extending out of the side wall of the casing and swinging back and forth in a curved trajectory, the needle bar extending out through the bottom of the casing and making reciprocating motion in the vertical direction, a needle being arranged at the protruding end of the needle bar; a thread clamp, a thread loosening hook and an adjusting frame are further arranged on the side of the casing where the thread taking-up rod extends out, the adjusting frame being arranged between the thread clamp and the thread taking-up rod, the thread loosening hook being connected to the main shaft through a transmission mechanism, the sewing thread being passed through the thread clamp, the adjusting frame, the thread taking-up rod and the needle in sequence, the present invention has a thread compensation function, which prevents the sewing thread from being too tight or too loose to cause unsightly stitches, and at the same time improves the needle insertion accuracy, and the thread amount is adjustable, which can assist the thread taking-up mechanism in controlling the thread amount, and can sew excellent and smooth stitches for fabrics of different thicknesses.

The present application discloses a control method, system, electronic device and storage medium for a synchronous vehicle, and the technical field to which it belongs is clothing processing equipment technology. The control method of the synchronous vehicle includes: when the thread take-up lever of the synchronous vehicle is in the upper needle stop position, recording the initial mechanical angle of the spindle motor; judging whether the presser foot of the synchronous vehicle is lifted; if so, determining the current mechanical angle of the spindle motor; calculating the spindle rotation angle according to the initial mechanical angle and the current mechanical angle; if the spindle rotation angle is within a preset range, adjusting the output power of the spindle motor to increase the rotational torque of the spindle motor; wherein the rotational torque of the spindle motor is used to increase the resistance to the downward movement of the piercing thread take-up mechanism. The present application can avoid the downward movement of the piercing thread take-up mechanism caused by lifting the presser foot, thereby improving the safety of the synchronous vehicle.

The utility model provides a sewing machine right thread hook, a thread passing mechanism and a sewing machine, the right thread hook comprises a fixed part and a thread path extension part, and the thread path extension part is arranged on the fixed part; the upper thread is arranged in the thread channel extension part in a penetrating manner, and the position of the upper thread relative to the fixed part is variable, so that the upper thread is in a vertical state. According to the right thread hook of the sewing machine, the thread passing mechanism and the sewing machine, the thread containing range of the thread passing portion on the thread channel extension portion 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, an upper thread can swing on the thread passing portion, the upper thread is made to be located at the low-tension position all the time, the variation amplitude of tension is reduced, and the sewing efficiency is improved. The stress condition of the large thread trapper is improved, the upper thread stability is improved, and therefore the problems of thread throwing, thread breaking and the like are reduced.

Embodiments of present disclosure relates to a thread drawing device and a thread drawing method. The thread drawing device comprises: a drive assembly (70) comprising a drive wheel (72) comprising a working platform (722) for supporting a thread (85), the thread (85) comprising a fixed end (852) fixed on an object (90) and a movable end (854) carried by a tool, a pressing assembly (60) comprising a pressing member (62) configured to move between a first position at which the pressing member (62) engages the working platform (722) to clamp the thread to be pulled therebetween and a second position at which the pressing member (62) disengages from the working platform (722) to release the thread to be pulled; and a motor (74) configured to rotate the drive wheel (72) when the pressing member (62) is at the first position so as to move a loose part (855) of the thread at the fixed end from the fixed end to the movable end.

The utility model belongs to the technical field of sewing equipment, and particularly relates to a sewing machine. Comprising a machine shell and a take-up-lever pin, a take-up-lever pin hole and an adjusting shaft hole are formed in the machine shell, the diameter of the take-up-lever pin hole is larger than or equal to the aperture of the adjusting shaft hole, the take-up-lever pin hole and the adjusting shaft hole are coaxially arranged, and the take-up-lever pin comprises a take-up-lever pin body and an eccentric section eccentrically arranged at one end of the take-up-lever pin body. The eccentric section is parallel to the axis of the take-up-lever pin body, the take-up-lever pin body is arranged in the take-up-lever pin hole, and the eccentric section is connected with the take-up-lever assembly. The take-up-lever pin hole and the adjusting shaft hole are coaxially arranged, the take-up-lever pin can be connected with a take-up-lever assembly only by arranging the take-up-lever pin into an eccentric structure, the take-up-lever pin hole and the adjusting shaft hole can be machined at the same time through one drilling tool, two-time clamping is not needed, machining is easy and convenient, and precision is high.

The utility model discloses a machine head of a full-automatic sewing machine for an automobile trim panel. The device mainly comprises a machine head baffle, a machine head baffle 2, an upper thread clamping assembly, a presser foot assembly, a cylinder 1, a cylinder joint, a machine head mounting base body, a circuit board mounting plate, an electromagnetic valve, a board card mounting plate, a presser foot sliding rail, a presser foot limiting block, a motor mounting plate, a synchronous pulley 1, a synchronous belt, a machine head mounting base plate, a needle bar upper guide sleeve, a machine head shell, a tensioning assembly, a sensor support and a bearing seat. The device comprises a bearing seat support, a synchronous pulley assembly and a needle bar assembly. The upper wire clamping assembly is installed on the machine head shell. The presser foot assembly is mounted on the machine head shell; the tensioning assembly is mounted on the machine head mounting base plate; the synchronous pulley assembly is mounted on the main shaft; the needle bar assembly is arranged on the machine head shell; the sewing machine head with the thread trimming function is efficient and reliable, stable sewing of a machine is guaranteed, production efficiency is greatly improved, and product quality is improved.

The utility model provides a sewing machine thread tension adjusting device and an adjusting device control system which are applied to a sewing machine. The thread tension adjusting device comprises a driving assembly, a thread trapper shaft, a thread picking spring assembly, a driven thread clamping assembly, a driving thread clamping piece, an elastic body and a pressing cap, and one end of the thread trapper shaft is connected with the driving assembly. One end, far away from the driving assembly, of the yarn trapper shaft sequentially penetrates through the yarn picking spring assembly, the driven yarn clamping assembly, the driving yarn clamping sheet and the elastic body and then is connected with the pressing cap; an upper thread of the sewing machine penetrates between the driving thread clamping piece and the driven thread clamping assembly. The driving thread clamping piece and the pressing cap are arranged at the two ends of the elastic body respectively, and the end faces, close to the elastic body, of the driving thread clamping piece and the pressing cap are smooth planes, so that stress of the elastic body is uniform, stability of thread tension is guaranteed, tension parameters needing to be set during sewing can be reduced, and the probability of stitch skipping and thread breaking is effectively reduced.

The utility model discloses a thread picking mechanism for sewing machine relates to sewing machine technical field, including thread picking lever, thread picking connecting rod and thread picking cam, one end of thread picking lever is fixedly connected with the connecting block, is equipped with the card hole on the connecting block, be provided with the sliding plate in thread picking connecting rod, the sliding plate sliding connection is in thread picking connecting rod, and the one end of sliding plate is through the one side of thread picking connecting rod to the outside of thread picking connecting rod, one end of sliding plate is fixedly connected with the L shaped clamping plate, the one end away from L shaped clamping plate of thread picking connecting rod is equipped with the sliding slot, the L shaped clamping plate sliding connection is in the sliding slot, the utility model discloses buckle type connection, when replacing thread picking lever, only need to pull out the sliding plate, can complete dismounting and installation in short time.

The utility model discloses an upper thread quantity adjusting mechanism, and relates to the technical field of bar tacking machines. The thickness sensor is used for detecting the thickness of the cloth pressed by the presser foot; a thread pushing rod is arranged on the side, deviating from the machine shell, of the thread passing arc plate, and a first thread penetrating hole is formed in the end of the thread pushing rod; and the counter-recoil device is connected with the wire passing arc plate. According to the upper thread quantity adjusting mechanism, the technical problems that an existing upper thread quantity adjusting mechanism of the bar tacking machine excessively depends on the understanding conditions of lathe workers on fabrics with different thicknesses, accurate adjustment is difficult to make even never adjustment in the actual working condition, and the thread breakage rate is extremely high are solved, the thickness sensor detects the thickness of the fabric after the fabric is pressed by the presser foot, and the adjustment accuracy is improved. The required thread quantity of the upper threads is calculated, so that the extending distance of the thread pushing rod is adjusted to be matched with the movement of the thread take-up lever, the thread take-up quantity of the thread take-up lever is adjusted, the thread supply quantity and the thread consumption quantity during fabric sewing are kept consistent as much as possible, and the thread breakage rate of the bar tacking machine in the sewing process is effectively reduced.

The utility model belongs to the technical field of sewing machines, and discloses a thread end clamping device and a sewing machine. The device comprises a fixing frame, a driving assembly and a clamping assembly, the fixing frame is configured to be installed on a machine head of the sewing machine, the driving assembly comprises a first driving mechanism and a second driving mechanism, the first driving mechanism is rotatably arranged on the fixing frame, and the second driving mechanism is connected to the output end of the first driving mechanism; the clamping assembly comprises two clamping arms connected to the output end of the second driving mechanism, and under driving of the second driving mechanism, the two clamping arms can be close to or away from each other in the X direction so as to clamp or loosen the sewing thread end. Under driving of the first driving mechanism, the clamping assembly can move in the Y direction and can extend to the position below the needle rod so as to ensure that the clamping assembly can clamp the sewing thread end. The device is reasonable in structure, convenient to install and high in reliability, and the situation that the sewing thread end cannot be clamped due to the fact that the position of the sewing thread end deviates is avoided.

The present application relates to a special trajectory cam needle bar stroke thread picking device and method, the operation needle bar crank rotation drives the needle bar stroke cam to move along the stroke trajectory through the upper cam bearing, to match the synchronous movement of the needle bar and the balance to complete the hooking thread and the take-up and pay-off thread; in the process of the balance pay-off thread, the needle bar is driven to descend to complete the hooking thread in cooperation with the rotation of the swing shuttle, the needle bar is driven to lift to start the take-up thread in the rotation process of the swing shuttle completing the hooking thread, the needle bar is driven to ascend and descend to complete the take-up thread in the process of the balance take-up thread in cooperation with the rotation of the swing shuttle, and then the thread with stronger stability is realized, and the matching synchronization reliability and stability of the needle bar stroke are greatly improved.

The present invention provides a long-arm thick material suturing device and its design method, belonging to the technical field of three-dimensional suturing of carbon / carbon composite materials. The device includes a thread picking mechanism for maintaining the tension of the suture thread; a material piercing mechanism for inserting the suture thread into the carbon / carbon composite material; a thread hooking mechanism for feeding the bottom thread and hooking the suture thread fed by the piercing mechanism to form a thread loop; and a needle holding mechanism for protecting the suture needle, preventing it from bending or even breaking when subjected to significant resistance. The present invention specifically sews conical, thick carbon / carbon composite materials with a thickness of 50 mm or more, improving their mechanical properties and providing a corresponding theoretical basis for related research. It improves the automation level of suturing technology, expands the application range of three-dimensional suturing of carbon / carbon composite materials, and can effectively improve the processing efficiency of carbon / carbon composite preforms, reduce costs, and improve economic benefits.

The present application relates to a kind of gantry rotary super-thick material seamers, including front end longitudinal displacement mechanism, sewing machine head, thread take-up base, horizontal transverse displacement mechanism and rear end longitudinal displacement mechanism;End longitudinal displacement mechanism and horizontal transverse displacement mechanism are provided with clamping longitudinal displacement device;Super-thick material is clamped by clamping longitudinal displacement device, so that super-thick material is completely fixed at both ends when sewing, and vibration is as low as possible to the deviation of material;While the conveying belt on the longitudinal displacement mechanism of both ends lifts super-thick material, ensure that clamping longitudinal displacement device does not slip when moving material, because material is too heavy.Secondly, front end longitudinal displacement mechanism, horizontal transverse displacement mechanism and clamping longitudinal displacement device are all through single motor cooperation linkage mechanism, realize the synchronous drive of single motor to multiple moving parts, so that super-thick material is stressed and speed same in moving process, ensure that material is completely controlled by sewing machine during sewing process, avoid asynchronous slip and cause sewing defect.

This utility model discloses a flexible thread feeding device and sewing equipment, including a thread take-up crank, a thread take-up connecting rod, and a thread take-up lever. The thread take-up lever includes a thread take-up arm and a thread passage hole. One end of the thread take-up connecting rod is hinged to the thread take-up lever, and the other end of the thread take-up connecting rod is hinged to an adjustment component. The adjustment component includes an adjustment crank and a drive source. One end of the adjustment crank is hinged to the drive source, and the other end of the adjustment crank is hinged to the thread take-up connecting rod. The adjustment component moves the thread take-up connecting rod and the hinged end of the adjustment crank to a target position by adjusting the adjustment crank, so that the thread passage hole of the thread take-up lever performs a target stroke. The sewing equipment includes a flexible thread feeding device, which is equipped with an electronic control system for controlling the adjustment component.

The transmission box comprises a box body, a driving shaft rotatably connected to one side of the box body, a thread tensioning mechanism, a thread shifting mechanism and a needle bending mechanism, wherein the thread tensioning mechanism comprises a thread guide, a thread tensioning rod and a first transmission assembly, the thread guide is provided with a thread guide hole, the thread tensioning rod is located beside the thread guide, the driving shaft can drive the thread tensioning rod to reciprocate up and down through the first transmission assembly when the driving shaft rotates, and the thread tensioning rod is provided with a thread tensioning hole; the thread shifting mechanism comprises a thread shifting hook and a second transmission assembly, the driving shaft can drive the thread shifting hook to reciprocate along the horizontal direction through the second transmission assembly when the driving shaft rotates; the needle bending mechanism comprises a needle and a third transmission assembly, the needle is provided with a thread passing channel extending along the length direction of the needle, and the driving shaft can drive the needle to move close to or away from the thread shifting hook through the third transmission assembly when the driving shaft rotates.

To make it easy to retrofit and remove a thread take-up lever suspension device to and from a conventional sewing machine head and maintain the thread take-up lever suspension device by downsizing the thread take-up lever suspension device and reducing change of a thread take-up lever drive mechanism from a conventional mechanism.SOLUTION: A thread take-up lever drive mechanism 27 comprises: a cam 21 having a cam groove 22 rotating with a main axis 3; and a thread take-up lever drive lever 24 having a cam follower 25 to be fitted in the cam groove and an action part 26 acting on a thread take-up lever 12. A thread take-up lever suspension device 30 comprises: a slide guide 31 provided on the thread take-up lever drive lever; a follower axis 32 that is provided so as to be slidable in a cam direction and a counter-cam direction in the slide guide and has the cam follower on a tip thereof; suspension means 33 to pull the follower axis in the counter-cam direction and pull out the cam follower from the cam groove; and suspension release means 35 to fit the cam follower in the cam groove by pushing the follow axis in the cam direction.SELECTED DRAWING: Figure 4

This invention provides a right thread hook for a sewing machine, a thread guide mechanism, a sewing machine, and a thread trajectory for the right thread hook. It includes a fixed part and a guide part. The guide part is slidably connected to the fixed part, and the thread passes through the guide part. The guide part can slide along the fixed part with the thread, keeping the thread in a low-tension position. In this invention, the guide part is slidably connected to the fixed part, thus ensuring that the thread-carrying range of the thread guide includes the movement range of the large thread clamp surface and the thread take-up lever's thread hole. During sewing, the guide part slides along the fixed part with the thread, keeping the thread in a low-tension position at all times, reducing tension fluctuations, and preventing thread slippage and breakage.

The utility model discloses a thread take-up shifting fork for thread shuttle winding, which comprises a shifting fork, a shifting fork support and a linear driving mechanism arranged on the shifting fork support, and a guide groove is arranged on the linear driving mechanism. One end of the shifting fork is rotationally connected with the shifting fork support, the other end of the shifting fork is used for taking up threads, the shifting fork is connected with the linear driving mechanism and located in the guide groove, and the linear reciprocating motion of the linear driving mechanism can drive the shifting fork to swing along the guide groove. The shifting fork is effectively prevented from deviating during movement, the guide groove is simple in structure, and the movement stability of the take-up shifting fork is ensured with low cost.

The invention belongs to the technical field of sewing machinery, and discloses a motor thread bonding device and a sewing machine. The motor thread bonding device comprises a transmission assembly and an adjusting mechanism, the adjusting mechanism comprises a clamping assembly and a thread moving assembly, the clamping assembly and the thread moving assembly are connected to the transmission assembly, the clamping assembly is used for clamping an upper thread, and the thread moving assembly is used for adjusting the length of the upper thread between a thread picking device and the clamping assembly; when the transmission assembly moves in the first direction, the clamping assembly increases the clamping force on the upper thread, and the thread moving assembly reduces the length of the upper thread between the thread picking device and the clamping assembly; when the transmission assembly moves in the second direction, the clamping assembly reduces the clamping force applied to the upper thread, and the thread moving assembly increases the length of the upper thread between the thread picking-up device and the clamping assembly. The motor thread bonding device is simple in structure and convenient to operate, and a user can move the transmission assembly according to the thickness of cloth to be sewn so as to synchronously adjust the upper thread tension and the thread quantity.