CN114575045A - Disconnect-type flush joint machine - Google Patents

Abstract

The present application proposes a separate type lockstitch machine, and specifically relates to the technical field of lockstitch machine manufacturing. The lockstitch machine has a frame, a platen, an upper thread mechanism and a lower thread mechanism. It is characterized in that the upper thread mechanism at least has a needle bar assembly, a presser foot lifter assembly and a thread take-up assembly, and the lower thread mechanism at least has a cloth feed dog assembly, For the hook assembly and the thread trimmer assembly, there is no mechanical transmission connection between the upper thread mechanism and the frame, and the lower thread mechanism has no mechanical transmission on the connection table. A separate lockstitch sewing machine of the present application has an upper thread mechanism and a lower thread mechanism that operate independently. The upper thread mechanism and the lower thread mechanism are skillfully separated on the mechanical transmission, the traditional upper and lower linkage mechanical transmission structure is cancelled, and the mechanical transmission of the lockstitch machine is realized. The mechanism does not require lubrication and oil-free work, which simplifies the mechanical structure and greatly reduces the manufacturing cost of the sewing machine, and has high promotion value.

Description

A separate lockstitch machine

technical field

The present application proposes a separation type lockstitch machine, which specifically relates to the technical field of lockstitch machine manufacturing.

Background technique

Lockstitch machine is a sewing equipment for sewing garments, bags, shoes and hats, and quilts. In a traditional lockstitch machine, the main shaft motor is connected to the upper main shaft, and the main shaft motor drives the upper main shaft to rotate, thereby driving the eccentric rotating wheel, the bevel gear and the needle bar crankshaft fixed to the upper main shaft to run at the same time. In the bottom thread sewing transmission mechanism, the eccentric rotating wheel drives the feed link and the lift link at the same time, the feed link drives the feed shaft through the swing seat assembly, and the lift link drives the lift shaft through the lift crank. Swing; the swing of the feeding shaft drives the tooth frame fixed on the feeding shaft to swing so as to provide a similar horizontal swing for the feeding dog, and the swing of the lifting shaft drives the swing of the lifting fork fixed on the lifting shaft to The feed dog provides approximately up and down direction swing, so that the feed dog is formed by the combination of horizontal swing in the front and rear direction and vertical swing in the up and down direction to form the running track of the cloth dog. At the same time, the bevel gear is connected to the vertical shaft in the vertical direction, the vertical shaft transmits the torque to the lower shaft, and the lower shaft is connected to run the hook by changing the size of the gear to increase the speed by 2 times.

To sum up, in the sewing process of the lockstitch machine, the eccentric rotating wheel, bevel gear and needle bar crankshaft on the main shaft are actually driven by the main shaft motor to realize the coordinated feeding of the cloth feeding dog, the presser foot and the needle. The sewing process of the shuttle running. The traditional lockstitch machine's upper and lower linkage transmission mechanism is complex. On the one hand, it causes high noise of the lockstitch machine. The rotary hook requirements are even higher. The traditional mechanical transmission structure of the lockstitch machine has been in use since the invention of the lockstitch machine. A feasible solution is needed to improve the transmission efficiency of the lockstitch machine, so as to overcome the above technical shortcomings, and at the same time, it can reduce the manufacturing difficulty of the lockstitch machine, Reduce the cost of the lockstitch machine and improve the intelligent control level of the lockstitch machine.

SUMMARY OF THE INVENTION

In view of the problem of complex mechanical transmission structure in the existing lockstitch machine technology, the present application provides an intelligent lockstitch machine with a structure and mechanical transmission separated, which has a frame, a platen, an upper thread mechanism and a lower thread mechanism. The upper thread mechanism at least has a needle bar assembly, a presser foot lifter and a thread take-up assembly, the lower thread mechanism at least has a feed dog assembly, a rotary hook assembly and a thread trimmer assembly, and there is no mechanical transmission connection between the upper thread mechanism and the frame , the bottom line mechanism has no mechanical transmission on the connecting platen.

Further, the needle bar assembly and the thread take-up assembly are driven by a power source, the presser foot lifter is driven by a presser foot lifter power source, and the cloth feed dog assembly is jointly driven by the front and rear cloth feeding motors and the up and down lifting motors. The hook assembly is driven by the hook power source, and the thread trimming assembly is jointly driven by the hook power source and the thread trimming power source.

Preferably, the upper thread mechanism is fixed on the frame, and the needle bar assembly, the presser foot lifter and the thread take-up assembly are installed and configured inside the head of the lockstitch machine.

Preferably, the lower thread mechanism has a fixing seat, the lower thread mechanism is fixed under the platen, and the fixing seat is provided with a feed dog assembly, a hook assembly and a thread trimmer assembly.

Preferably, the power source of the needle bar assembly drives the rotating disk to rotate, and the eccentric position of the rotating disk is connected with a moving connecting rod, the moving connecting rod drives the needle crank, and the needle crank drives the needle to move up and down.

Preferably, the power source of the wire take-up assembly drives the wire take-up reel, and a wire take-up post is provided at an eccentric position of the wire take-up reel, and the wire take-up post has a wire-pulling slot.

Preferably, the rotating disc, the wire take-up sub-dish and the wire take-up disc are also arranged concentrically, and a centrally connected connecting shaft is provided between the wire take-up sub-drum and the wire take-up disc.

Preferably, the presser foot lifting power source of the presser foot lifting assembly drives the presser foot cam to rotate, the presser foot cam acts on the cam action plate provided on the upper part of the presser foot rod, and is installed between the cam action plate and the machine head of the lockstitch machine A spring is set together on the presser foot rod.

Preferably, the front and rear feeding motors of the feeding dog assembly drive the turntable and then drive the connecting rod, and the output shafts at both ends of the upper and lower lifting motors are respectively equipped with a tooth-lifting cam and a tooth-lifting cam. The two tooth-lifting cams act respectively on the two bumps at the bottom of the support frame.

Preferably, the front and rear cloth feeding motors are fixed on the rear side of the fixed seat, the output ends of the front and rear cloth feeding motors are sleeved on the swing rod of the driving end of the feeding dog connecting frame, and the feeding dog assembly has an up-down lifting motor. It is fixed to the bottom of the fixed seat that the lockstitch machine has.

Preferably, the upper part of the feeding dog connecting frame is connected to the feeding dog, and the copper sleeve swinging rod and the driving end swinging rod provided at both ends of the feeding dog connecting frame are respectively arranged on the support frame, the copper sleeve swinging rod and the driving end swinging rod matching through holes.

Preferably, the connecting rod is movably connected to the eccentric position of the turntable, and the turntable is fixed on the output shafts of the front and rear cloth feeding motors.

Preferably, the upper two ends of the support frame are fixedly connected with the above-mentioned front and rear cloth feeding motors and the fixed copper sleeve, and there is a gap between the two ends of the supporting frame and the fixed seat sufficient to meet the swing of the front and rear cloth feeding motors.

Preferably, support rods are respectively provided on the front and rear sides of the support frame, brackets are respectively provided on the front and rear positions of the upper and lower lifting motors on the fixed seat, and the brackets have grooves for supporting the support rods. On the one hand, the grooves hold the entire Support frame.

Preferably, the hook fixing seat of the hook assembly is fixed, a wire rack is placed inside the hook fixing seat, and a non-slip cover is provided outside the wire rack, and the hook assembly has a hollow space with a power source for the hook The rotating shaft drives the hook needle to hook the sewing upper thread on the machine needle and the sewing lower thread of the inner thread holder of the suspended rotary hook to form a bar knot.

Preferably, the hollow shaft of the power source of the hook is fixedly connected with the hook, the hollow shaft of the power source of the hook is sleeved on the fixing rod connected with the hook fixing seat, the hook running track is concentric with the fixing rod, and the hook is fixed. The rod and the wire stand are arranged concentrically.

Preferably, the thread trimming power source pushes the thread trimming link, and the thread trimming link is pushed and rotated by the hook power source so that the end mechanism performs the thread trimming action.

Preferably, the push block at the front end of the thread trimming link reaches into the notch of the hollow rotating shaft, the thread trimming link generates thrust on the secondary pusher link and the main pusher link, the main pusher holder and the pusher The knife holder is respectively connected to the main knife and pushes the secondary knife.

Preferably, the thread trimming link has a connecting rod end hinged with the main pusher link, the secondary pusher link and the middle position hinge of the thread trimmer link, and a chute at the middle of the thread trimmer link. The groove is matched with the sliding rod arranged on the hook power source/or the thread trimming power source bracket, and the spring thread trimming power source bracket and the thread trimming link are also provided with springs.

Preferably, the operation panel starts the thread trimming action when the hook power source runs for the last circle, and the thread trimming power source immediately bounces back to the original position after the thread trimming action is completed.

Preferably, the frame is further provided with an external presser foot mechanism, the external presser foot mechanism has an external presser foot, and the external presser foot is used for pressing the sewing fabric around the presser foot of the sewing machine.

Preferably, the outer presser foot is connected to an outer presser foot connecting rod, the outer presser foot connecting rod is connected to a fixing plate, and the fixing plate is connected to the output shaft of the outer presser foot driving source.

Preferably, the outer presser foot driving source is installed and fixed on the long arm end of the frame of the sewing machine.

Preferably, a lifting device is also provided between the table and the frame of the lockstitch machine, the lifting device is used to lift the height of the frame, and the lifting power source of the lifting device is installed on the table, and the lifting power source The upper end of the lifting rod is fixed with a rack.

Preferably, the frame of the lockstitch machine is further provided with a rotation device, and the frame rotation power source of the rotation device is installed between the frame (30) and the platen, and the frame rotation power source starts to drive The rack rotates.

A separate lockstitch sewing machine of the present application has an upper thread mechanism and a lower thread mechanism that operate independently, and the upper thread mechanism and the lower thread mechanism are skillfully separated on the mechanical transmission, the traditional upper and lower linkage mechanical transmission structure is cancelled, and the mechanical transmission of the lockstitch machine is realized. The mechanism does not need to be lubricated and oil-free. The bottom thread mechanism not only has the advantages of high practicability and strong versatility, but also the bottom thread mechanism can be made into a modular form for use on various lockstitch machines. The separated lockstitch sewing machine of the present application maximizes the transmission efficiency, further realizes the intelligent control of sewing, and especially makes subversive technical reforms in the structure and mechanical transmission, which simplifies the mechanical structure and greatly reduces the manufacture of the sewing machine. cost, with high promotion value.

Description of drawings

Fig. 1 is the structural representation of a kind of separation type lockstitch machine of the present application;

Figure 2 is a schematic diagram of an upper thread mechanism and a lower thread mechanism of a separate lockstitch sewing machine of the present application;

3 is a schematic diagram of the bottom thread mechanism of a separate lockstitch sewing machine of the present application;

4 is a schematic diagram of a feed dog assembly of a separate lockstitch sewing machine of the present application;

5 is a schematic diagram of a tooth-lifting cam one and a tooth-lifting cam two of a separate lockstitch sewing machine of the present application;

6 is a rear view of a feed dog assembly of a separate lockstitch sewing machine of the present application;

Fig. 7 is a schematic diagram of a cloth feed dog and a cloth feed dog connecting frame of a separate lockstitch sewing machine of the present application;

8 is a schematic diagram of a thread trimmer assembly of a separate lockstitch sewing machine of the present application;

9 is a schematic diagram of a thread trimmer push rod of a separate lockstitch sewing machine of the present application;

Fig. 10 is the internal structure diagram of the thread trimmer push rod of a separate lockstitch sewing machine of the present application;

11 is a schematic diagram of a rotary hook assembly of a separate lockstitch sewing machine of the present application;

12 is a schematic diagram of a guide rail of a separate lockstitch sewing machine of the present application;

13 is a schematic diagram of the pattern stitch of a separate lockstitch sewing machine of the present application;

Fig. 14 is a schematic diagram of intermittent stitches in pattern seams of a separate lockstitch sewing machine of the present application.

Reference numerals: needle thread mechanism 10, machine head 11, needle bar assembly 15, needle 152, power source 153, rotary plate 154, moving link 155, needle crank 156, presser foot lifter assembly 16, presser foot 161, lifter Presser foot power source 162, presser foot cam 163, cam action plate 164, spring one 165, presser foot lever 166, outer presser foot mechanism 18, outer presser foot 181, outer presser foot connecting rod 182, fixing plate 183, outer presser foot Power source 184, lower thread mechanism 20, fixed seat 23, cloth feed dog assembly 25, cloth feed dog 251, up and down lift motor 252, front and rear cloth feed motor 253, cloth feed dog connection frame 254, support frame 255, tooth lift cam 1 256 , Lifting cam II 257, needle plate 258, fixed copper sleeve 259, drive end swing rod 25a, copper sleeve swing rod 25b, turntable 25e, connecting rod 25f, bracket 250, support rod 25c, groove 25d, rotary hook assembly 26 , Suspended hook 261, hook power source 262, notch 26c, hook 263, fixing rod 264, hook fixing seat 265, anti-skid cover 266, hollow shaft 267, thread stand 268, thread trimmer assembly 27, thread trimmer power Source 271, thread trimmer link 272, push block 272a, link end 272b, chute 272c, thread trimmer power source bracket 27e, spring 273, main knife 274, main push knife link 275, secondary knife 276, thread trimmer bracket 277, Main pusher tool rest 278, secondary pusher connecting rod 279, pusher tool rest 270, frame 30, long arm end 31, operation panel 40, controller 50, platen 60, lifting power source 70, lifting rod 71, machine Rack rotation power source 72, main guide rail 81, auxiliary guide rail 82, working guide rail 83, wire take-up assembly 90, wire take-up sub-disk 91, wire take-up disk 92, wire take-up column 921, wire pulling slot 922, wire take-up link 93, clamp Thread 1 94, Thread Clamp 2 95, thread take-up shaft 96.

Detailed ways

The preferred embodiments of the present application will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, so that the protection scope of the present application can be more clearly defined. These embodiments It is only used to illustrate the present invention, but not to limit the present invention.

1 and 2 are schematic diagrams of the structure of a separate lockstitch machine of the present application. The lockstitch machine has an upper thread mechanism 10, a lower thread mechanism 20, a frame 30, an operation panel 40, a controller 50 and a table 60. Wherein, the upper-wire mechanism 10 and the operation panel 40 are fixed on the frame 30, and specifically, the upper-wire mechanism 10 is fixed on the long arm end 31 of the frame 30. The lower thread mechanism 20 is fixed under the platen 60 , the operation panel 40 is fixed in the middle of the frame 30 , the operation surface of the operation panel 40 faces the operator, and the frame 30 is fixed on the platen 60 .

The above-mentioned upper thread mechanism 10 and lower thread mechanism 20 constitute a sewing system with a lockstitch machine function. The platen 60 is close to the side of the upper thread mechanism 10, and the lower thread mechanism 20 has a fixing seat 23. Inside the fixing seat 23, at least the needle bar assembly 15, the presser foot lifting assembly 16 and the thread take-up assembly 90 are installed. under rack 30. There is no mechanical transmission connection between the above-mentioned upper thread mechanism and the frame, and the bottom thread mechanism has no mechanical transmission on the connection platen. The separation type intelligent lockstitch sewing machine of the present application is structurally separated, and is also separated up and down on the mechanical transmission.

In the present application, the lower thread mechanism 20 is set and manufactured to be modular, so as to be easily installed and used on various models. The lockstitch machine optimized in the present application has the advantages of simple structure, and the transmission mechanism of the lockstitch machine adopts a separate and pioneering design.

The needle thread mechanism 10 of the lockstitch sewing machine has a machine head 11 , and the machine head 11 is fixed on the frame 30 . The above-mentioned upper thread mechanism 10 is composed of at least a needle bar assembly 15, a presser foot lifter assembly 16 and a thread take-up assembly 90. The needle bar assembly 15, the presser foot lifter assembly 16 and the thread take-up assembly 90 work together during the sewing process to achieve the task of needle thread sewing. .

In FIG. 2 , the needle bar assembly 15 includes a needle 152 , a power source 153 , a rotary disk 154 , a movable link 155 and a needle crank 156 . The power source 153 drives the rotating disk 154 to rotate, and a moving link 155 is connected to the eccentric position of the rotating disk 154.

The above-mentioned presser foot lifter assembly 16 has a presser foot 161 , a presser foot lifter power source 162 , a presser foot cam 163 , a cam action plate 164 , a presser foot lever 166 and a spring one 165 . The presser foot lift power source 162 drives the presser foot cam 163 to rotate. The presser foot cam 163 acts on the cam action plate 164 on the upper part of the presser foot lever 166. A spring 165 is installed between the cam action plate 164 and the machine head 11. The spring A 165 is sleeved on the presser foot rod 166 , and the presser foot lifting power source 162 drives the above-mentioned relevant components to perform the lifting action of the presser foot 161 . The presser foot 161 of the present application is in a normal pressure state. When the presser foot lifter power source 162 rotates, the presser foot cam 163 leaves the cam action plate 164, and the spring one 165 pushes the cam action plate 164 to lift the presser foot 161. When the presser foot is to be pressed, the above-mentioned presser foot cam 163 leaves the cam action plate 164, and the spring one 165 presses the presser foot lever 166 to keep the presser foot 161 pressed down; during the sewing process, the above-mentioned spring one 165 is between the cam action plate 164 and the cam action plate 164. The presser foot 161 is always given a maintaining elastic force between the machine heads 11 to realize the normal pressure of the presser foot.

In FIGS. 2 to 8 , the fixing base 23 of the lower thread mechanism 20 is provided with a feed dog assembly 25 , a hook assembly 26 and a thread trimmer assembly 27 . The feeding dog assembly 25 has a feeding dog 251, a support frame 255, a bracket 250, a feeding dog connecting frame 254, a vertical lifting motor 252, and a front and rear feeding motor 253. The front and rear feeding motors 253 are fixed on the rear side of the fixing base 23. , the output end of the front and rear cloth feeding motors 253 is sleeved on the driving end swing rod 25a of the feeding dog connecting frame 254 .

The above-mentioned up-down lift motor 252 is fixed on the bottom of the fixed seat 23, the output shafts at both ends of the up-down lift motor 252 are respectively equipped with a tooth-lifting cam 1 256 and a tooth-lifting cam 2 257, and the tooth-lifting cam 1 256 and the tooth-lifting cam 2 257 function respectively. Two bumps on the bottom of the support frame 255 . The upper two ends of the support frame 255 are provided with front and rear cloth feeding motors 253 and fixed copper sleeves 259, and there is a gap between the two ends of the supporting frame 255 and the fixed seat 23 sufficient for the front and rear cloth feeding motors 253 to swing. Support rods 25c are respectively provided on the front and rear sides of the support frame 255, and brackets 250 are respectively provided at the front and rear positions of the up and down lift motors 252 on the fixing base 23. The groove 25d supports the entire support frame 255, so that the feed dog assembly 25 swings left and right in the groove 25d. The up-and-down motor 252 controlled by the operation panel 40 makes a rotating action, and drives the tooth-lifting cam 1 256 and the tooth-lifting cam 2 257 to rotate. The frame 255 performs an up-and-down motion that satisfies the feed dog 251, thereby driving the feed dog 251 to swing up and down.

The upper part of the feeding dog connecting frame 254 is connected to the feeding dog 251. The copper sleeve swinging rod 25b and the driving end swinging rod 25a at both ends of the feeding dog connecting frame 254 are respectively arranged on the supporting frame 255 and the copper sleeve swinging rod 25b and the driving end. The end swing rod 25a is matched with the through hole. The feed dog connecting frame 254 is movably connected with a connecting rod 25f, which is movably connected to the turntable 25e, the connecting rod 25f is movably connected to the eccentric position of the turntable 25e, and the turntable 25e is fixed on the output shaft of the front and rear feeding motors 253. The front and rear feeding motors 253 controlled by the operation panel 40 drive the turntable 25e and then the connecting rod 25f, so that the feeding dog connecting frame 254 can provide a swing source that satisfies the left and right swinging action of the feeding dog 251, thereby driving the feeding dog 251 to swing left and right. Under the control of the operation panel 40, the left-right swinging motion of the front and rear feeding motors 253 and the up-and-down swinging motion of the up-and-down lifting motor 252 are transmitted to the feeding dog 251 through the feeding dog connecting frame 254 to form a feeding dog in an action state. 251, to realize the feeding action of the feeding dog 251 of the lockstitch sewing machine.

The fixing base 23 also has a needle plate 258 integrally connected with the fixing base 23 . The fixing base 23 rotates together with the needle plate 258 . The above-mentioned up-down lift motor 252 and front and rear cloth feed motor 253 are controlled by the operation panel 40 to realize programmed control in the adjustment of the sewing stitch length, which overcomes the traditional method of adjusting the stitch length of the original lockstitch machine, and has an epoch-making technical value.

In FIGS. 8 , 9 and 10 , the thread trimming assembly 27 includes a hook power source 262 , a hollow rotating shaft 267 , a push knife holder 270 , a thread trimming power source 271 , a thread trimming link 272 , a spring 273 , a main knife 274 , and a main pusher. The knife connecting rod 275 , the secondary knife 276 , the thread trimming bracket 277 , the main pushing knife tool rest 278 and the secondary pushing knife connecting rod 279 . When the sewing is about to end, the operation panel 40 can start the thread trimming action when the hook power source 262 runs for the last turn. First, the thread trimming power source 271 is activated to push the thread trimming link 272. The block 272a reaches the notch 26c of the hollow shaft 267, so that the hollow shaft 267 in operation drives the thread trimming link 272 to rotate, and the rotating thread trimming link 272 pushes the thread trimming end mechanism to perform the thread trimming action. The rotating thread trimming link 272 generates a thrust force on the secondary pusher link 279 and the main pusher link 275, so that the main pusher rest 278 and the pusher rest 270 are pushed. The main push knife rest 278 and the push knife rest 270 are connected to the main knife 274 and the push secondary knife 276 respectively, and the main push knife rest 278 and the push knife rest 270 push the lower connection main knife 274 and push the secondary knife 276 to complete the thread trimming action. The connecting rod end 272b of the above-mentioned thread trimming link 272 is hinged with the main pusher link 275, the secondary pusher link 279 is hinged with the middle position of the thread trimmer link 272, and the middle position of the thread trimmer link 272 also has a chute 272c. The above-mentioned sliding groove 272c matches the sliding rod 262a provided on the hook power source 262 or the thread trimming power source bracket 27e. After the thread trimming action is completed, the thread trimming power source 271 immediately rebounds back to the original position, and the thread trimming link 272, the main knife 274 and the pushing secondary knife 276 also return to the original position.

In FIGS. 10 and 11 , the hook assembly 26 has a suspended hook 261 , a hook fixing base 265 , a non-slip cover 266 , a thread stand 268 , a hook power source 262 and a hook 263 . The hook fixing seat 265 is fixed during sewing of the lockstitch sewing machine, a wire frame 268 is placed inside the hook fixing seat 265, and a non-slip cover 266 is provided outside the wire frame 268. The non-slip cover 266 is used for the wire frame 268 slide out. The hook power source 262 drives the hook needle 263 to hook the sewing upper thread on the needle 152 and the sewing lower thread of the inner thread holder 268 of the suspended hook 261 to form a bar tack. The hook 263 is fixedly connected with the hollow shaft 267 of the hook power source 262, the hollow shaft 267 of the hook power source 262 is sleeved on the fixing rod 264 of the hook fixing seat 265, and the running track of the hook 263 is connected to the fixing rod. 264 is arranged concentrically, and the fixing rod 264 is arranged concentrically with the wire frame 268 . The above-mentioned suspension hook 261 and the hook fixing base 265 have a sliding line gap and positioning arrangement, and the suspension hook 261 and the anti-skid cover plate 266 have a sliding line gap.

In Fig. 12, the lockstitch sewing machine of the present application has a fabric positioning device, and the fabric positioning device has a main guide rail 81, a sub guide rail 82 and a working guide rail 83. The main guide rail 81 is fixedly installed on the platen 60, the auxiliary guide rail 82 is dynamically connected to the main guide rail 81, and one end of the auxiliary guide rail 82 operates within the limit of the main guide rail 81; One side of the guide rail 83 is movably connected to the auxiliary guide rail 82 , and the working guide rail 83 operates within the limit of the auxiliary guide rail 82 . During sewing, the fabric configuration is fastened on the working guide rail 83, and the working guide rail 83 moves with the change of the sewing stitch. Specifically, the horizontal stitch is that the working guide rail 83 operates within the range of the auxiliary guide rail 82, and the longitudinal stitch is the auxiliary guide rail. 82 operates within the scope of the main guide rail 81, and other stitches are completed by the coordinated operation of the auxiliary guide rail 82 and the main guide rail 81, so that the pattern seam of the lockstitch sewing machine has high controllability.

13 and 14, the thread take-up assembly 90 of a separate lockstitch sewing machine of the present application has a thread take-up auxiliary disc 91, a thread take-up disc 92, a rotating shaft 96, a thread gripper 94, a thread gripper two 95, The thread take-up link 93 , the power source 153 and the rotary disk 154 . The thread take-up post 921 is fixed on the eccentric position of the above-mentioned thread take-up disc 92. The thread take-up post 921 has a wire pulling slot 922. On the wire-pulling groove 922, the sewing upper thread is put on the wire-pulling groove 922, and the wire take-up disc 92 and the wire take-up column are rotated in a circular motion. Take-up or pay-off. The rotating disc, the wire take-up sub-disc and the wire take-up disc of the above-mentioned thread take-up assembly are arranged concentrically, and a centrally connected connecting shaft is arranged between the wire take-up sub-disc and the wire take-up disc. The wire take-up disc 92 and the wire take-up auxiliary disc 91 are connected and driven by the wire take-up rotating shaft 96, and both the rotary disc 154 and the wire take-up sub-disc 91 are provided with synchronous wire take-up links 93 at eccentric positions. When the rotating disc 154 is continuously rotated by the power source 153, the rotating disc 154 drives the thread take-up link 93, the thread take-up link 93 drives the needle 152 and the thread take-up sub-disc 91 to run at the same time, and the thread take-up disc 92 finally drives the thread take-up The column 921 performs thread take-up work. The wire take-up sub-reel 91 drives the wire take-up reel 92 to run through the wire take-up rotating shaft 96. The thread take-up assembly 90 of the present application has a simple structure, and the thread take-up speed is kept consistent with the operation of the needle 152, so that the thread take-up and pay-off of the sewing thread is more accurate, and the intelligent control level of the lockstitch machine is improved.

It should be pointed out here that the rotation of the take-up reel 92 is not limited to the above-mentioned transmission mechanism, and what is advocated is the solution that can drive the take-up reel 92 of the present application to rotate in a circle.

Figure 14 shows that the lockstitch sewing machine of the present application also has an external presser foot mechanism 18. The external presser foot mechanism 18 is composed of an external presser foot 181, an external presser foot connecting rod 182, a fixing plate 183 and an external presser foot power source 184. The above-mentioned outer presser foot power source 184 is installed and fixed on the frame 30. The outer presser foot power source 184 drives the outer presser foot 181 to press the sewing fabric on the table 60, and the outer presser foot 181 prevents the fabric from sliding under the sewing state. It affects the production process of the next sewing. The above-mentioned outer presser foot 181 is pressed around the presser foot 161, either in a circle or in a square shape, etc. In short, the presser foot 161 is within the pressing range of the outer presser foot 181. The outer presser foot 181 is connected to the outer presser foot connecting rod 182, the outer presser foot connecting rod 182 is connected to the fixing plate 183, the fixing plate 183 is connected to the output shaft of the outer presser foot power source 184, and the outer presser foot power source 184 performs telescopic operation to drive the fixing plate 183 is displaced to realize the pressing or releasing of the sewing fabric by the outer presser foot 181.

In FIG. 1, a lifting device is also provided between the table 60 and the frame 30 of the lockstitch machine. The lifting device is used to lift the height of the frame 30, and the frame 30 can be lifted when thicker fabrics need to be sewn. After the fabric is placed, the frame 30 can be lowered to the original height to start sewing. Specifically, the lifting power source 70 is installed on the platen 60, and the upper end of the lifting rod 71 of the lifting power source 70 is fixed with the rack 30.

In FIG. 1, the frame 30 of the lockstitch sewing machine is also provided with a rotating device, and the above-mentioned rotating device is to rotate the frame 30 on the platen 60, and the purpose is to rotate the frame 30 together with the upper thread mechanism 10 to a certain angle to meet the requirement of For special sewing needs, after the fabric is placed, the frame 30 can be returned to its original position to start sewing. The frame rotation power source 72 is installed between the frame 30 and the platen 60, and the frame rotation power source 72 is activated to drive the frame 30 to rotate.

To sum up, the upper thread mechanism 10 and the lower thread mechanism 20 constitute a sewing system with the function of a lockstitch sewing machine, and realize the conventional sewing function of the lockstitch sewing machine.

The above are only the preferred embodiments of the present application, and are not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied in other related technical fields , are similarly included within the scope of patent protection of this application.

Claims (25)

1. A split flat sewing machine is provided with a machine frame (30), a bedplate (60), a top threading mechanism (10) and a bottom threading mechanism (20), and is characterized in that the top threading mechanism (10) at least comprises a needle rod assembly (15), a pressure raising and pressing foot assembly (16) and a thread picking assembly (90), the bottom threading mechanism (20) at least comprises a feed dog assembly (25), a rotating shuttle assembly (26) and a thread cutting assembly (27), the top threading mechanism (10) is not in mechanical transmission connection with the machine frame (30), and the bottom threading mechanism (20) is not connected with mechanical transmission on the bedplate (60).

2. A split flat seamer as claimed in claim 1 wherein the needle bar assembly (15) and the thread take-up assembly (90) are driven by a power source (153), the presser foot assembly (16) is driven by a presser foot power source (162), the feed dog assembly (25) is driven by both a front and rear feed motor (253) and an up-down lift motor (252), the rotating shuttle assembly (26) is driven by a rotating shuttle power source (262), and the thread cutting assembly (27) is driven by both a rotating shuttle power source (262) and a thread cutting power source (271).

3. A split lockstitch machine as claimed in claim 1, wherein said thread feeding mechanism (10) is fixed to the frame (30), and said needle bar assembly (15), presser foot assembly (16) and thread take-up assembly (90) are mounted and arranged inside the head (11) of the lockstitch machine.

4. A split sewing machine according to claim 1, wherein the thread take-up (20) has a fixed base (23), the thread take-up (20) is fixed under the table (60), and a feed dog assembly (25), a rotating shuttle assembly (26) and a thread trimming assembly (27) are arranged inside the fixed base (23).

5. The split flat seamer of claim 2, wherein the power source (153) of the needle bar assembly (15) drives the rotating disc (154) to rotate, the eccentric position of the rotating disc (154) is connected with a movable connecting rod (155), the movable connecting rod (155) drives the needle crank (156), and the needle crank (156) drives the needle (152) to move up and down.

6. The split flat sewing machine according to claim 2, wherein the power source (153) of the thread take-up assembly (90) drives the take-up reel (92), a thread take-up column (921) is arranged at an eccentric position of the take-up reel (92), and the thread take-up column (921) is provided with a thread pulling groove (922).

7. The split type lockstitch sewing machine as claimed in claim 6, wherein the thread take-up assembly (90) further comprises a rotating disk (154), a thread take-up sub-disk (91) and a thread take-up disk (92) which are concentrically arranged, a connecting shaft (93) connected with the center is arranged between the thread take-up sub-disk (91) and the thread take-up disk (92), the power source (153) drives the rotating disk (154), the rotating disk (154) drives the thread take-up connecting rod (93), and the thread take-up connecting rod 93 drives the machine needle 152 and the thread take-up sub-disk 91 to operate.

8. The separate sewing machine according to claim 2, wherein the presser foot lifting power source (162) of the presser foot lifting assembly (16) drives the presser foot cam (163) to rotate, the presser foot cam (163) acts on the cam action plate (164) provided on the upper portion of the presser foot lever (166), and the spring (165) is installed between the cam action plate (164) and the head (11) provided on the sewing machine and sleeved on the presser foot lever (166).

9. The split flat seamer of claim 2, wherein the feed dog assembly (25) comprises a front feed motor (253) and a rear feed motor (253) which drive the rotating disc (25e) and then drive the connecting rod (25f), output shafts at two ends of the up-down lifting motor (252) are respectively provided with a first feed lifting cam (256) and a second feed lifting cam (257), and the first feed lifting cam (256) and the second feed lifting cam (257) respectively act on two convex blocks at the bottom of the supporting frame (255).

10. The split flat seamer of claim 9, wherein the front and rear cloth feeding motors (253) are fixed at the rear side of the fixing base (23), the output ends of the front and rear cloth feeding motors (253) are sleeved on the swing rod (25a) at the driving end of the cloth feeding tooth connecting frame (254), and the cloth feeding tooth assembly (25) is provided with an up-down lifting motor (252) fixed at the bottom of the fixing base (23) of the flat seamer.

11. The split type lockstitch sewing machine according to claim 10, wherein a feed dog (251) is connected above the feed dog connecting frame (254), and a copper bush swinging rod (25b) and a driving end swinging rod (25a) which are arranged at two ends of the feed dog connecting frame (254) are respectively arranged in through holes of the supporting frame (255) which are matched with the copper bush swinging rod (25b) and the driving end swinging rod (25 a).

12. A split type lockstitch sewing machine according to claim 9, wherein the connecting rod (25f) is movably connected to an eccentric position of a rotary table (25e), and the rotary table (25e) is fixed to an output shaft of the front and rear cloth feeding motors (253).

13. The separating type flat sewing machine according to claim 9, wherein both ends of the upper part of the supporting frame (255) are fixedly connected with the front and rear cloth feeding motors (253) and the fixed copper sleeves (259), and a gap enough to satisfy the swinging of the front and rear cloth feeding motors (253) is formed between both ends of the supporting frame (255) and the fixed seat (23).

14. The split type flat seamer of claim 9, wherein the front and rear sides of the supporting frame (255) are respectively provided with a supporting rod (25c), the front and rear positions of the up-down lifting motor (252) on the fixing seat (23) are respectively provided with a bracket (250), the bracket (250) is provided with a groove (25d) for supporting the supporting rod (25c), and the groove (25d) on one hand supports the whole supporting frame (255).

15. The split type lockstitch sewing machine according to claim 2, characterized in that the rotating shuttle component (26) has a fixed rotating shuttle fixing seat (265), a thread stand (268) is placed inside the rotating shuttle fixing seat (265), an anti-slip cover plate (266) is arranged outside the thread stand (268), the hollow rotating shaft (267) of the rotating shuttle component (26) with a rotating shuttle power source (262) drives the crochet needle (263) to hook the upper sewing thread on the needle (152) and form a hitch with the lower sewing thread of the thread stand (268) in the suspension rotating shuttle (261).

16. The split type flush joint machine according to claim 2, wherein the hollow rotating shaft (267) of the rotating shuttle power source (262) is fixedly connected with the crochet hook (263), the hollow rotating shaft (267) of the rotating shuttle power source (262) is sleeved on a fixed rod (264) connected with the rotating shuttle fixing seat (265), the operation track of the crochet hook (263) is concentrically arranged with the fixed rod (264), and the fixed rod (264) is concentrically arranged with the thread stand (268).

17. A split flat seamer as claimed in claim 2 wherein the thread trimming power source (271) pushes the thread trimming link (272), and the thread trimming link (272) is rotated by the rotating shuttle power source (262) to make the end mechanism perform the thread trimming action.

18. A split lock stitch sewing machine as claimed in claim 17, wherein the thread cutting connecting rod (272) has a push block (272a) at its front end which reaches a notch (26c) in the hollow rotary shaft (267), the thread cutting connecting rod (272) pushes against the secondary push blade connecting rod (279) and the main push blade connecting rod (275), and the main push blade holder (278) and the push blade holder (270) connect the main knife (274) and the push secondary knife (276), respectively.

19. The split type flat seamer of claim 17 wherein the thread cutting connecting rod (272) has a connecting rod end (272b) hinged with the main push blade connecting rod (275), the sub push blade connecting rod (279) is hinged with the middle position of the thread cutting connecting rod (272), the middle position of the thread cutting connecting rod (272) is further provided with a sliding groove (272c), the sliding groove (272c) is matched with a sliding rod (262a) arranged on the rotating shuttle (262)/or the thread cutting power source bracket (27e), and the thread cutting power source bracket (27e) and the thread cutting connecting rod (272) of the spring (273) are further provided with a spring (273).

20. A split type flush joint machine according to claim 9, wherein the operation panel (40) starts the thread trimming operation when the rotary shuttle power source (262) operates for the last turn, and the thread trimming power source (271) rebounds to the original position immediately after the thread trimming operation is completed.

21. The separate type flat sewing machine according to claim 1, wherein the frame (30) is further provided with an outer presser foot mechanism (18), the outer presser foot mechanism (18) is provided with an outer presser foot (181), and the outer presser foot (181) is used for pressing the sewing cloth around a presser foot (161) of the sewing machine.

22. The outer presser foot mechanism of split sewing machine as claimed in claim 21, wherein said outer presser foot (181) is connected to an outer presser foot link (182), the outer presser foot link (182) is connected to a fixing plate (183), and the fixing plate (183) is connected to an output shaft of an outer presser foot drive source (184).

23. An outer presser foot mechanism of split sewing machine as claimed in claim 22, wherein said outer presser foot drive source (184) is fixedly mounted to the long arm end (31) of the frame (30) provided in the sewing machine.

24. The split type flat seamer of claim 1, wherein a lifting device is further arranged between the bedplate (60) and the frame (30) of the flat seamer, the lifting device is used for lifting the height of the frame (30), the lifting device is provided with a lifting power source (70) which is arranged on the bedplate (60), and the frame (30) is fixed on the upper end of a lifting rod (71) of the lifting power source (70).

25. A split type flush-bonding machine according to claim 1, wherein said frame (30) of said machine is further provided with a rotating means having a frame rotating power source (72) mounted between said frame (30) and said platen (60), said frame rotating power source (72) being operative to drive said frame (30) in rotation.

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