3501 results about "Sewing machine" patented technology

The invention relates to the technical field of clothing manufacturing, in particular to an AI scheduling optimization method for clothing flexible production and an ERP integrated system. Comprising the following steps: multi-source heterogeneous data acquisition and fusion: acquiring real-time equipment state data of a clothing production line through Internet of Things equipment, wherein the real-time equipment state data comprises a sewing machine rotating speed, a cutting bed load rate and a quality inspection station abnormal signal; obtaining an order delivery period, a material inventory and a BOM process path through an ERP system; the equipment data and the order data are stored in a distributed database after being aligned through timestamps; dynamic priority modeling: constructing a dynamic priority calculation model based on the order emergency degree, the production line bottleneck process load threshold and the material neat rate, and generating an order-insertable process-level priority queue; according to the scheme, the limitation of a traditional method can be broken through, and the modern production requirements of flexibility and high aging are met.

The invention discloses a sewing machine needle dynamic track self-adaptive deviation correction control system, and relates to the technical field of needle control. The fusion acquisition module is used for acquiring data by an industrial camera, a displacement sensor and the like and performing fusion denoising; the dynamic self-adaptive model construction module is used for constructing a track model by means of a deep learning framework in combination with sewing parameters; the multi-dimensional deviation analysis module is used for generating a priority matrix by integrating deviations such as positions and postures; the layered collaborative deviation rectification module plans a deviation rectification path through reinforcement learning and the like; according to the intelligent flexible execution module, flexible deviation correction is achieved through a voice coil motor and a piezoelectric ceramic driver, and all the modules cooperate to guarantee sewing precision. Needle data are accurately collected, a track model is adjusted in real time according to the process, deviation is intelligently analyzed, layered deviation correction is conducted, and compliant control is achieved; meanwhile, the functions of environment perception, fault diagnosis, man-machine interaction and the like are achieved, sewing precision, adaptability and efficiency are improved, and energy consumption is reduced.

This invention provides a single-action anti-bird nest thread-cutting mechanism and its control method. The single-action anti-bird nest thread-cutting mechanism includes a fixed blade, a rotatable movable blade, a thread-cutting drive source, and a thread-cutting drive assembly. The fixed blade has a fixed blade edge. The thread-cutting drive source is connected to the movable blade via the thread-cutting drive assembly, driving the movable blade to rotate towards or away from the fixed blade. The movable blade has a starting thread hook groove and a separating thread hook groove. The starting thread hook groove allows the sewing machine needle to pass through. The movable blade has a moving blade edge on its surface facing the fixed blade. The starting thread hook groove and the separating thread hook groove are distributed on the same side of the moving blade edge. This application uses the same thread-cutting drive source and the same set of movable and fixed blades to achieve the purpose of preventing bird nests during the starting thread cutting and automatic thread cutting after sewing, effectively avoiding thread breakage during the starting thread and achieving a stable effect of normal starting thread without bird nest clumps.

The utility model relates to the technical field of sewing machines, in particular to a guide rail of an inner shuttle frame, the inner shuttle frame and a rotating shuttle, which comprises a non-closed annular guide rail body with a self-lubricating wear-resistant function, a thread hooking head is arranged at one end of the annular guide rail body, and a thread loosening head is arranged at the other end of the annular guide rail body. The inner side face of the annular guide rail body is concavely provided with a mounting cavity and a plurality of meshing holes concavely formed in the side wall of the mounting cavity, and the meshing holes are distributed along the mounting cavity. The annular guide rail body has the self-lubricating and wear-resisting functions, the guide rail is firmly connected to the outer side wall of the inner shuttle body, and the guide rail on the inner shuttle body is high in position precision and good in stability.

The utility model provides a thread trimming mechanism and a sewing machine with the same. The thread trimming mechanism comprises a first movable cutter which comprises a thread clamping part and a first cutting edge part; the second movable cutter is arranged on one side of the first movable cutter, and the second movable cutter comprises a thread collecting groove and a second cutting edge part, and the thread collecting groove is used for allowing the upper threads to penetrate through; the second cutting edge part is located on the side, away from the first movable cutter, of the line concentration groove and faces a groove opening of the line concentration groove. The first cutting edge part is located on the side, away from the second movable cutter, of the thread clamping part and faces the thread clamping part. Wherein the second movable cutter is movably arranged in the direction close to or away from the first movable cutter so as to move to a thread clamping position where a clamping gap used for clamping an upper thread is formed between the thread clamping part and the second cutting edge part or a thread cutting position where the first cutting edge part and the second cutting edge part are in contact to cut off the upper thread. According to the technical scheme provided by the utility model, the technical problem that bird nest stitches are easily formed when a sewing machine in the prior art starts sewing can be solved.

The utility model provides a thread trimming structure of a sewing machine, and belongs to the technical field of sewing machines. The problems that an existing thread trimming structure is insufficient in working reliability and short in service life are solved. The thread trimming structure of the sewing machine comprises a thread pressing piece, an auxiliary cutter arranged on a machine base and a movable cutter which is located below a needle plate and can vertically swing around a rotating shuttle shaft of the sewing machine, the auxiliary cutter is provided with a thread trimming end with an auxiliary cutter edge, a thread hooking groove is formed in the movable cutter, and a movable cutter edge is formed in the upper edge of the thread hooking groove. When the movable cutter swings upwards, the thread hooking groove can directly face the needle falling hole up and down, when the movable cutter swings downwards, the cutting edge of the movable cutter can be meshed with the cutting edge of the auxiliary cutting edge, the thread pressing piece is movably connected to the upper side face of the movable cutter, and the movable cutter is further provided with a reset spring acting on the thread pressing piece. And when the auxiliary knife edge is meshed with the movable knife edge, the thread trimming end of the auxiliary knife can abut against the lower side face of the thread pressing piece. The working reliability and the service life of the thread trimming structure can be improved.

The present invention provides a driving device for thread cutting, presser foot lifting and needle pitch adjustment, belonging to the technical field of sewing machines. It solves the problems such as reduced working efficiency of the existing device when meeting the requirements of driving thread cutting, presser foot lifting and needle pitch adjustment by one motor. The driving device for thread cutting, presser foot lifting and needle pitch adjustment includes a motor. A separately arranged thread cutting cam, a presser foot lifting cam and a needle pitch adjusting cam are fixedly connected to the rotating shaft of the motor. Both the thread cutting cam and the presser foot lifting cam are diamond-shaped, and the needle pitch adjusting cam is a curved quadrilateral. The needle pitch adjusting mechanism abuts against the outer peripheral wall of the needle pitch adjusting cam. When the effective needle pitch adjusting section of the needle pitch adjusting cam acts on the needle pitch adjusting mechanism, the thread cutting idle stroke surface of the thread cutting cam acts on the thread cutting mechanism, and the lifting idle stroke surface of the presser foot lifting cam acts on the presser foot lifting mechanism. This device meets the requirements of driving thread cutting, presser foot lifting and needle pitch adjustment by one motor and improves the working efficiency of the sewing machine at the same time.

The invention provides a cloth stem-crossing detection sewing device and method. The cloth stem-crossing detection sewing device comprises a first presser foot rod provided with an outer presser foot, a second presser foot rod provided with an inner presser foot, a presser foot transmission mechanism, a control module, a sewing material thickness detection sensor, an alternating quantity adjusting mechanism, an alternating quantity detection sensor and an alternating quantity adjusting driving source. The sewing material thickness detection sensor is obliquely mounted at the bottom of the sewing machine shell; detection points, falling on the sewing material, of the sewing material thickness detection sensor are distributed on the rear sides of the outer presser foot and the inner presser foot in the feeding direction of forward feeding during forward sewing of the sewing machine; the presser foot transmission mechanism is provided with a transmission swing seat for determining the alternating quantity of presser feet, and the alternating quantity adjusting driving source is connected with the transmission swing seat through the alternating quantity adjusting mechanism. The sewing material thickness is effectively detected in advance, so that the presser foot alternation amount is adjusted in time, the presser foot alternation amount of the sewing machine adapts to the change of the sewing material thickness, efficiency is improved, stem-crossing stitches are beautified, and sewing quality is guaranteed.

The utility model discloses a sewing machine with a turning piece. The sewing machine comprises a machine base, a sewing machine head, a rotating shuttle assembly and an extension arm. A transmission shaft is arranged in the extension arm; the end, away from the machine base, of the extension arm is provided with a turning piece in an extending mode, the turning piece comprises a first connecting part and a second connecting part, the rotating shuttle assembly is arranged on the second connecting part, the transmission shaft is in transmission connection with the rotating shuttle assembly through the linkage assembly, and a machining station is defined by the sewing machine head and the rotating shuttle assembly. An avoiding position is defined by the machine base, the extension arm and the first connecting part; thus, the first connecting part extends in the vertical direction, a processing position suitable for sewing is provided, meanwhile, an avoiding position which is large enough is provided, a shell of the luggage can penetrate through the avoiding position easily, the avoiding position can provide an avoiding space which is large enough for the luggage in the sewing process, in the actual sewing process, the shell and a bottom shell of the luggage do not need to be alternated up and down, and the sewing efficiency is improved. Therefore, the sewing effect is improved.

An embroidery frame arrangement assignable to a sewing or embroidery machine and on which an at least sectionally tubular or bag-like textile structure is clampable in order to provide a flat, single-layer first partial region of the textile structure to be embroidered. The embroidery frame arrangement has first and second frame parts which are fixable together and / or second and third frame parts which are fixable together. The tubular or bag-like section of the textile structure is fixable between the first and second frame parts or between the second and third frame parts when the second frame part engages with the first frame part and / or when the third frame part engages with the second frame part. Consequently, the flat, single-layer first partial region of the textile structure to be embroidered is provided on the second frame part and surrounded thereby or is provided on the third frame part and surrounded thereby.

The drilling device comprises a machine tool and a drilling unit, the drilling unit is arranged in the machine tool to conduct drilling machining on a machine head body of the sewing machine, and the drilling unit comprises a first air cylinder, a fixing box, a drill bit, a bearing and a dismounting and mounting assembly; a first air cylinder is fixedly installed on the upper side wall body of the machine tool, an output shaft at the lower end of the first air cylinder is fixedly connected with a fixing box, a bearing is arranged on the front side of the fixing box, and one end of the drill bit penetrates through the bearing to be installed in the fixing box. The dismounting and mounting assembly comprises a fixing mechanism for mounting the sewing machine head body and a replacing mechanism for replacing the sewing machine head body; by means of the automatic drill bit replacing device, time is greatly saved, production efficiency is improved, production stagnation caused by manual drill bit replacing after shutdown is greatly reduced, and a powerful guarantee is provided for large-scale sewing machine head production.

According to the noise vibration test equipment and the rotating shuttle calibration method, a rotating shuttle to be tested is installed on a rotating shuttle shaft driven by a driving device to rotate, an outer shuttle frame is fixed through a rotating shuttle positioning device, and the assembly and operation states of the rotating shuttle in a sewing machine are truly simulated; the noise and vibration parameters during high-speed operation are collected in real time by means of the noise and vibration detector, the noise and vibration performance of the rotating shuttle can be quantitatively evaluated before the whole machine is assembled, and interference of other parts of the whole machine is avoided. According to the method, the unqualified rotating shuttle can be recognized and debugged in advance, the situation that the noise and vibration of the whole machine exceed the standard due to the individual gap difference of the rotating shuttle is effectively prevented, front screening and grading management of the rotating shuttle quality are achieved, and the one-time assembly yield of the whole machine is remarkably improved; meanwhile, complex debugging after the whole machine is assembled is omitted, the rework, replacement and labor cost is greatly reduced, and the production efficiency and the product consistency are improved.

The embodiment of the invention relates to the field of smart home, and discloses a smart socket and a sewing machine fault early warning method. The method comprises the following steps: if an intelligent socket registration request is received, performing Bluetooth connection with an intelligent socket; acquiring first equipment information of the intelligent socket, and registering the intelligent socket to an Internet of Things platform according to the first equipment information and the Wi-Fi distribution network information; if the sewing machine registration request is received, second equipment information of the sewing machine connected to the intelligent socket is determined, and the sewing machine is registered to the Internet of Things platform; and monitoring whether the intelligent socket and the sewing machine have fault monitoring data in real time, if so, generating alarm information according to the fault monitoring data, and sending the alarm information to an intelligent terminal of a user. According to the scheme, through the functions of automatic equipment registration, real-time fault monitoring, intelligent alarm, remote management and the like, the intelligent management level of the equipment can be improved, the user experience is improved, the fault rate is reduced, the maintenance cost is saved, and the safety and reliability of the equipment are enhanced.

The invention discloses a system and a method for monitoring the real-time working state of an intelligent sewing machine, and relates to the technical field of sewing machine running state monitoring. By comparing an actual ratio with a task preset ratio, a generated synchronous error set can accurately reflect the stability state of a feeding action in a sewing task; and further extracted deviation level parameters, fluctuation amplitude parameters and fluctuation trend characteristics are counted through a sliding window, so that the numerical trend of synchronous deviation between a feeding system and a needle bar system can be dynamically quantified, and subsequent trend modeling of fluctuation behaviors can be supported. The stitch density change score obtained through calculation can evaluate the stitch density stability of the current sewing task section in real time, abnormal section recognition and dynamic marking are carried out in combination with density tolerance threshold parameters, and a finally formed abnormal marking result set enables the system to have traceable, quantifiable and linkable density abnormal state sensing capacity.

The invention relates to the technical field of sewing machines, in particular to a sewing machine presser foot lifting control method, which is characterized in that a main shaft motor, a feed lifting motor, a driving motor, a main shaft driven by the main shaft motor to rotate, a feed dog frame positioned below a needle plate and a feed dog mounted on the feed dog frame are arranged in the sewing machine; the main shaft drives the tooth frame and the feeding teeth to move back and forth in a reciprocating manner through a feeding mechanism connected between the main shaft and one end of the tooth frame; the feed lifting motor drives the feed rack and the feeding teeth to reciprocate up and down through a feed lifting mechanism connected between the feed lifting motor and the other end of the feed rack; the driving motor drives the presser foot to lift through a presser foot lifting mechanism connected between the driving motor and the presser foot; and before the driving motor drives the presser foot lifting mechanism to execute the presser foot lifting action, the feed dog lifting mechanism is driven by the feed dog lifting motor to enable the feed dog to be below the needle plate. The cloth cannot be dragged even if the feeding teeth move back and forth when the presser foot is lifted, so that the cloth can be conveniently taken and placed, the cloth is protected from being scratched, and the influence on the use of customers is avoided.

The invention provides a PI controller parameter optimization method and device, a control system, a terminal and a medium, and the PI controller parameter optimization method comprises the steps: setting a plurality of height sampling points in a presser foot stroke range of a sewing machine; for each height sampling point, determining an initial parameter of any one of a proportional gain KP and an integral gain KI of the PI controller and an initial parameter interval of the other parameter through a preliminary test; and optimizing the other parameter in the initial parameter interval by adopting an iterative approximation method to obtain an optimized parameter of the PI controller. Through precise PI controller parameter optimization design, the control precision of a user on different presser foot heights can be met. In addition, characteristics of different sewing materials and diversified working condition requirements can be effectively met, and powerful support is provided for efficient and high-quality development of sewing work.

The utility model relates to the technical field of sewing machines, in particular to an outer shuttle frame and a rotating shuttle, which comprise an outer shuttle main body with an integral structure, a mounting cavity arranged in the middle of the outer shuttle main body, a guide groove concavely arranged on the side wall of the mounting cavity and a mounting surface arranged on the top end surface of the guide groove, and at least one arc-shaped limiting piece detachably arranged on the mounting surface. The arc-shaped limiting piece is used for limiting the guide rail of the inner shuttle frame in the guide groove, the side wall of the outer shuttle body is provided with at least one dust discharging hole communicated with the guide groove, the top edge of the outer shuttle body is provided with a thread pushing protrusion, a needle inserting groove located below the thread pushing protrusion and a needle protecting face connected with the needle inserting groove, and the needle inserting groove is used for insertion of a machine needle. The outer shuttle body is of an integrated structure, the structural stability is good, the upper threads are pushed outwards through the thread pushing protrusions, the upper threads are convenient to loosen, the needle protection faces are arranged for limiting and protecting the machine needles, dust in the guide grooves is discharged through the dust discharging holes, heat dissipation is facilitated, and the fault probability that the inner shuttle frame is clamped in the outer shuttle body is reduced.

The utility model discloses a turn-over device. The turn-over device comprises a mounting seat, a first pressing mechanism, a second pressing mechanism and a turn-over mechanism, the second pressing mechanism comprises two lifting pressing assemblies; the turn-over mechanism comprises a plurality of blowing assemblies and pressing and folding assemblies. The utility model further discloses automatic top fly sewing equipment. According to the sewing machine, the first pressing mechanism is arranged and used for fixing sewing cloth; the lifting press-fit assembly is arranged to be used for pressing and loosening the folded part of the front fly material, the blowing assembly is arranged in cooperation to provide a blowing function to blow the folded part of the front fly material, the pressing and folding assembly folds the folded part of the front fly material, and automation is improved; according to the automatic top fly sewing equipment, full-automatic machining of automatic feeding of materials to be sewn, automatic top fly turning, sewing machining and discharging is achieved, the automation efficiency is improved, the labor intensity and cost of workers are reduced, and the production efficiency and quality of shirts are improved.

The utility model discloses a synchronous belt transmission sewing machine which comprises a sewing machine body, the sewing machine body is provided with a machine base, a sewing machine head and a rotating shuttle assembly, and a front section main shaft, a rear section main shaft, a front section auxiliary shaft and a rear section auxiliary shaft are arranged on the machine base. A lifting driving device is arranged on the machine base and drives the sewing machine head to ascend and descend so as to adjust the height of the sewing machine head. The front-section main shaft and the front-section auxiliary shaft are arranged on the sewing machine head; the rear-section main shaft is in transmission connection with the front-section main shaft through a first synchronous belt transmission device; the rear-section countershaft is in transmission connection with the front-section countershaft through a second synchronous belt transmission device; therefore, compared with a matching mode of protrusions and grooves, transmission matching among the first synchronous wheel, the second synchronous wheel, the first synchronous belt, the linkage synchronous wheel, the second synchronous belt and the sewing machine head has the advantages that sliding is avoided during sewing, the transmission ratio is accurate, the transmission efficiency is high, the sewing needle pitch is uniform, and the sewing quality consistency is good. And the working process of the sewing machine head is more stable.

The present invention proposes a sewing machine with stitch length adjustment and zero-position positioning of a swing seat, specifically relating to the technical field of sewing machine manufacturing, comprising a driving source, a connecting rod, and a swing seat, characterized in that it also comprises an adjusting wheel and a slider, wherein the driving source drives the slider on the output shaft to indirectly position the swing seat at zero, and the slider is arranged on a slide groove of the adjusting wheel, the adjusting wheel is connected to the connecting rod, and the connecting rod is hinged to the swing seat. The present application has the characteristics of high accuracy in positioning the zero point of the swing seat, the static positioning wheel is fixed and equipped with an adjusting wheel to make the operation more stable, the gap between the various components is small after positioning, the degree of mechanical wear of the various components is small, and the noise is relatively low, which has the advantages of stable operation and high promotion and use value.

The invention discloses an autonomous sewing system and method based on multi-modal sensing and self-adaptive control. The autonomous sewing system comprises a robot module, a sewing machine module, a visual sensing module and an intelligent control platform. According to the cloth pose registration module, high-precision registration of a flexible target is realized through a two-stage registration process, a local area weighting ICP and a non-rigid cloth surface registration method; the intelligent control module adopts a visual servo dynamic path tracking control method, dynamically corrects the posture of the robot, improves the path tracking precision and the sewing thread consistency, and ensures machine-machine collaborative synchronization and uniform sewing thread uniformity by constructing a speed, track and tension three-factor coupling synchronous control method. By adopting an error adjustment and tension stabilization mechanism based on self-adaptive control, the robustness of the system in a complex sewing state is improved; and through the data analysis module and the exception handling module, full-process monitoring, quality evaluation and exception grading response are realized, and the stability and reliability of the system are improved.

The sewing equipment comprises a sewing machine body, the sewing machine body comprises a machine needle and a presser foot, the sewing equipment further comprises a U-shaped workbench and a thread adjusting mechanism, the U-shaped workbench is used for bearing and fixing a voice coil damper assembly of the loudspeaker, and the voice coil damper assembly comprises a voice coil, a damper and a brocade silk thread; the presser foot is used for pressing down and fixing the damper on the U-shaped workbench; the thread adjusting mechanism comprises a thread adjusting rod, and the thread adjusting rod is used for upwards lifting the first section of the brocade silk thread; the machine needle is used for connecting preset connecting points of the brocade silk threads to the damper in a sewing mode, and the first section of each brocade silk thread protrudes upwards by a radian after sewing is completed. According to the invention, the brocade silk threads of the voice coil can be sewed and connected to the damper, so that the routing problem of the brocade silk threads is solved; the length of the brocade silk threads can be controlled, and the radian consistency of the brocade silk threads is controlled.

The utility model provides a long straight line automatic sewing machine for lifting belt production, which relates to the technical field of sewing machines and comprises an operating platform, a sewing machine body is arranged in the middle of the top of the operating platform, a head body is arranged at the bottom of one side of the sewing machine body, and a limiting device is arranged at the top of the operating platform. The limiting device comprises two L-shaped plates, the bottoms of the two L-shaped plates are symmetrically and fixedly connected with the two sides of the top of the operation table respectively, and threaded rods are in threaded connection with the inner walls of the L-shaped plates. And the roller can limit the lifting belt while not hindering normal movement of the lifting belt, so that the lifting belt is prevented from moving on the top of the operation table, deviation of the sewing position of the lifting belt is prevented, and the actual quality of the lifting belt is ensured.

The invention provides a sewing efficiency detection method and system based on sewing machine worker action analysis, a medium and a terminal. The method comprises the following steps of obtaining a motor starting time point and a motor stopping time point of sewing equipment; obtaining a turner sewing image of a time period between the adjacent motor stop time point and the motor start time point; based on the sewing image of the turner, acquiring the action duration of each sewing action executed by the turner, wherein the sewing actions comprise cutting piece taking, cutting piece sewing, cutting piece arranging and cutting piece placing; and obtaining the sewing efficiency of the lathe worker based on the sewing action and the action duration. According to the sewing efficiency detection method and system based on sewing turner action analysis, the medium and the terminal, the turner sewing efficiency is detected based on action recognition of the sewing turner and action data of the sewing machine, and the method and the system are rapid and efficient.

The utility model provides a swing mechanism in a sewing machine or a button sewing machine, and belongs to the technical field of sewing machines. The button sewing machine solves the problem of how to enable the moving precision of buttons on the button sewing machine to be high. And the like. According to the swing mechanism in the sewing machine or the button sewing machine, the sewing machine or the button sewing machine comprises a rack, a first power source and a swing bottom plate are arranged on the rack, the swing mechanism comprises a swing disc and a connecting rod assembly, the first power source is connected with the swing disc and can drive the swing disc to swing relative to the rack, a first through groove is formed in the swing disc, and a second through groove is formed in the connecting rod assembly. The inner end of the connecting rod assembly is hinged to the first through groove and can slide in the first through groove, and the outer end of the connecting rod assembly is connected with the swing bottom plate. The inner end of the connecting rod assembly is hinged into the first through groove, the first through groove plays a role in limiting swinging of the connecting rod assembly, the swinging precision of the swinging bottom plate is improved, and the moving precision of the button on the swinging bottom plate is improved.

The invention relates to a thread trimming control method, a thread trimming control system and a sewing machine, the thread trimming control method comprises the following steps: arranging a first sensor, a second sensor and a third sensor which are arranged in sequence, the distance between the first sensor, the second sensor and the third sensor is L1, and the distance between the second sensor and the third sensor is L2; when the fabric reaches the second sensor from the first sensor, the controller calculates that the current stitch length of the sewing machine is O1 = L1 / N, and N is the number of turns of rotation of the sewing machine; the controller calculates the number of turns of rotation required by the sewing machine within the distance of L2, M = L2 / O1 = m + n, and m is an integer, 0 lt; nlt; 1; when ngt; k, when the fabric passes through the second sensor, the controller adjusts the stitch length of the sewing machine through the execution motor and the stitch length adjusting mechanism, so that the adjusted stitch length O2 meets the condition that L2 / O2 = x + y, and x is an integer, 0 lt; yt; Yt; 1, y < = k, 0.4 < = k < = 0.6; when n is smaller than or equal to k, the sewing machine continues sewing according to the stitch length of O1. According to the thread trimming control method, the thread trimming control system and the sewing machine, the problem that under the existing large-stitch-length sewing working condition, cloth and thread residues are very prone to being scattered is solved.

The utility model belongs to the technical field of button sewing machines, and particularly relates to a feeding device of a button sewing machine, which comprises a material clamping rod arranged on a rack of the button sewing machine in a sliding manner, and a material clamping groove is arranged at the front end of the material clamping rod; the rotating part is rotationally connected to the side end of the front part of the material clamping rod; the sliding piece is connected to the side end of the rotating piece in a sliding mode, and a clamping jaw part is arranged at the front end of the sliding piece and located on the front side of the clamping groove; the driving piece is installed on the clamping rod, and the driving end of the driving piece is movably connected with the rear end of the rotating piece and used for driving the rotating piece to rotate; the two ends of the elastic piece are connected to the rotating piece and the sliding piece correspondingly, and the elastic piece is used for enabling the sliding piece to have the trend of moving towards the rear end of the clamping rod; the limiting piece is arranged on a rack of the button sewing machine and is used for limiting the backward movement of the sliding piece; and the clamping jaw part linearly moves on the clamping rod, so that the clamping jaw part is prevented from hitting a subsequent workpiece during clamping, and the workpiece conveying stability is ensured.

The invention provides a sewing machine, and belongs to the technical field of sewing equipment. The problem that an existing sewing machine is insufficient in sewing quality is solved. The sewing machine comprises a base, a needle plate with a needle falling hole, a rotating shuttle located below the needle plate, a thread shifting rod and a rotating piece capable of horizontally rotating, a guide piece located on the side portion of the rotating shuttle and capable of horizontally swinging is arranged on the base, the thread shifting rod comprises a rod body and an arc-strip-shaped thread shifting head, and the rod body is connected to the guide piece in a sliding mode in the axial direction of the rod body. One end of the thread pulling head is fixedly connected to the end, close to the rotating shuttle, of the rod body and bent upwards relative to the rod body, the other end of the rod body is rotationally connected to the position, deviating from the rotating center of the rotating piece, of the rotating piece, and when the rotating piece drives the rod body to move, the other end of the thread pulling head can be located between the needle falling hole and the rotating shuttle. The sewing quality is further improved, and the manufacturing cost is remarkably reduced on the basis.

The invention discloses a sewing machine iron ball head polishing device which comprises a base, a mounting frame is further arranged above the base, a third motor is fixedly connected to the mounting frame, the output sliding end of the third motor is fixedly connected with a chuck, and an auxiliary clamping assembly corresponding to the chuck is further arranged above the base. A right angle is formed between the rotating cutting direction of the rough polishing tool bit and the fine polishing tool bit and the rotating direction of the iron ball head of the sewing machine, so that the effect of grinding the ball head in all directions can be achieved, and the surface of the iron ball head of the sewing machine can be comprehensively ground and polished; the edge angles and protrusions on the surface of the iron ball head of the sewing machine can be effectively removed, the rough polishing tool bit and the fine polishing tool bit can be tightly attached to the surface of the iron ball head of the sewing machine through the arranged polishing arc groove, and the rough polishing tool bit and the fine polishing tool bit wrap one side of the iron ball head of the sewing machine for rough polishing and fine polishing. Therefore, the polishing effect of the sewing machine iron ball head can be further improved.

The invention provides a thread trimming mechanism of a sewing machine, and belongs to the technical field of sewing machines. A thread trimming mechanism of a sewing machine comprises a fixed cutter; the movable cutter assembly is matched with the fixed cutter, can translate relative to the fixed cutter and is used for trimming threads; the driving assembly is used for driving the moving cutter assembly to move back and forth, the driving assembly comprises a swing rod, the swing rod can swing around a first axis, one end of the swing rod is movably connected with the moving cutter assembly, and the swing rod is further provided with a contact assembly; a thread trimming cam is fixed to the transmission shaft and makes contact with the contact assembly, so that the swing rod can swing in the direction away from the fixed cutter; a push rod of the pusher is connected with the lower end of the contact assembly, and the pusher is used for enabling the swing rod to swing towards the fixed cutter.