CN114575045A - Disconnect-type flush joint machine - Google Patents

Abstract

The application provides a disconnect-type flush joint machine, concretely relates to flush joint machine makes technical field. The flat sewing machine is provided with a frame, a bedplate, a thread feeding mechanism and a bottom thread mechanism, and is characterized in that the thread feeding mechanism is at least provided with a needle bar component, a presser foot lifting component and a thread picking component, the bottom thread mechanism is at least provided with a cloth feeding tooth component, a rotating shuttle component and a thread cutting component, the thread feeding mechanism is connected with the frame in a non-mechanical transmission manner, and the bottom thread mechanism is not connected with the mechanical transmission on the bedplate. The application provides a disconnect-type flush joint machine possess separately independent operation mechanism and the lower thread mechanism of going up, and the mechanism and the lower thread mechanism of going up will go up the line ingeniously and make the separation on mechanical transmission, have cancelled traditional linkage mechanical transmission structure from top to bottom, have realized that flush joint machine mechanical transmission mechanism does not need lubricated oilless work, make mechanical structure simplify more and have reduced sewing machine's manufacturing cost by a wide margin, have higher spreading value.

Description

Disconnect-type flush joint machine

Technical Field

The application provides a disconnect-type flush joint machine, concretely relates to flush joint machine makes technical field.

Background

A flat bed sewing machine is a sewing machine for sewing clothes, bags, shoes, hats, bedding, and the like. A main shaft motor of the traditional flat sewing machine is connected with an upper main shaft, and the main shaft motor drives the upper main shaft to rotate so as to drive an eccentric rotating wheel, a conical gear and a needle rod crankshaft which are fixedly connected with the upper main shaft to rotate simultaneously. In the bottom thread sewing transmission mechanism, the eccentric rotating wheel simultaneously drives the cloth feeding connecting rod and the feed lifting tooth connecting rod to operate, the cloth feeding connecting rod drives the cloth feeding shaft to operate through the swinging seat assembly, and the feed lifting tooth connecting rod drives the feed lifting tooth shaft to swing through the feed lifting tooth crank; the swing of the feed shaft drives the tooth frame fixedly connected to the feed shaft to swing approximately in the horizontal direction, the swing of the feed lifting shaft drives the feed lifting fork fixedly connected to the feed lifting shaft to swing approximately in the vertical direction, and the obtained feed lifting tooth is combined with the horizontal front-back direction swing and the vertical up-down direction swing to form a feed lifting tooth running track. Meanwhile, the bevel gear is connected with a vertical shaft in the vertical direction, the vertical shaft transmits torque to the lower shaft, and the lower shaft is connected with the rotating shuttle and can improve the rotating speed by 2 times by changing the size of the gear to operate the rotating shuttle.

In conclusion, the sewing process of the flat sewing machine is actually a sewing process in which a spindle motor drives an eccentric rotating wheel, a bevel gear and a needle bar crankshaft on a spindle to realize the cooperative cloth feeding of a cloth feeding tooth, a presser foot and a machine needle, and a rotating shuttle is matched with the sewing process. The traditional vertical linkage transmission mechanism of the flat sewing machine is complex, on one hand, the noise of the flat sewing machine is high, on the other hand, the requirements on the manufacturing standard of mechanical transmission parts of the flat sewing machine are higher, and particularly, the requirements on a rotating shuttle playing a key role in sewing an off-line outgoing line are higher. Since the existence of the lockstitch sewing machine and the traditional mechanical transmission structure thereof, a feasible scheme is needed to improve the transmission efficiency of the lockstitch sewing machine so as to overcome the technical defects, and simultaneously, the manufacturing difficulty of the lockstitch sewing machine, the manufacturing cost of the lockstitch sewing machine and the intelligent control level of the lockstitch sewing machine can be reduced.

Disclosure of Invention

Aiming at the problem that the existing flat sewing machine is complex in mechanical transmission structure, the intelligent flat sewing machine with the structure separated from the mechanical transmission is provided with a rack, a bedplate, a thread feeding mechanism and a bottom thread mechanism, and is characterized in that the thread feeding mechanism is at least provided with a needle rod assembly, a presser foot lifting assembly and a thread picking assembly, the bottom thread mechanism is at least provided with a cloth feeding tooth assembly, a rotating shuttle assembly and a thread cutting assembly, the thread feeding mechanism is connected with the rack in a non-mechanical transmission mode, and the bottom thread mechanism is not connected with the mechanical transmission on the bedplate in a non-connection mode.

Furthermore, the needle bar assembly and the thread take-up assembly are driven by a power source, the presser foot lifting assembly is driven by a presser foot lifting power source, the cloth feeding tooth assembly is driven by a front cloth feeding motor, a rear cloth feeding motor and an up-down lifting motor together, the rotating shuttle assembly is driven by a rotating shuttle power source, and the thread cutting assembly is driven by the rotating shuttle power source and a thread cutting power source together.

Preferably, the needle bar assembly, the presser foot lifting assembly and the thread take-up assembly are arranged in a machine head of the flat sewing machine.

Preferably, the bottom thread mechanism is provided with a fixed seat, the bottom thread mechanism is fixed below the bedplate, and a feed dog assembly, a rotating shuttle assembly and a thread cutting assembly are arranged in the fixed seat.

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

Preferably, the power source of the thread take-up assembly drives the take-up reel, a thread take-up column is arranged at the eccentric position of the take-up reel, and the thread take-up column is provided with a thread pulling groove.

Preferably, the rotating disc, the take-up auxiliary disc and the take-up disc which are further arranged on the take-up assembly are arranged concentrically, and a connecting shaft which is connected with the take-up auxiliary disc in the center is arranged between the take-up auxiliary disc and the 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 a cam acting plate arranged on the upper part of the presser foot rod, and a spring is arranged between the cam acting plate and a machine head arranged on the flat sewing machine and is sleeved on the presser foot rod together.

Preferably, the feed dog assembly is provided with a front feed motor and a rear feed motor which drive the rotary disc to drive the connecting rod, output shafts at two ends of the up-down lifting motor are respectively provided with a first feed lifting cam and a second feed lifting cam, and the first feed lifting cam and the second feed lifting cam respectively act on the two convex blocks at the bottom of the support frame.

Preferably, the front and rear cloth feeding motors are fixed on the rear side of the fixing seat, the output ends of the front and rear cloth feeding motors are sleeved on the driving end swinging rod of the cloth feeding tooth connecting frame, and the up-down lifting motor of the cloth feeding tooth assembly is fixed at the bottom of the fixing seat of the flat sewing machine.

Preferably, the upper part of the feed dog connecting frame is connected with a feed dog, and a copper sleeve swinging rod and a driving end swinging rod which are arranged at two ends of the feed dog connecting frame are respectively arranged in through holes of the supporting frame, and are matched with the copper sleeve swinging rod and the driving end swinging rod.

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

Preferably, both ends of the upper part of the support frame are fixedly connected with the front and rear cloth feeding motors and the fixed copper sleeve, and a gap which is enough to satisfy the swing of the front and rear cloth feeding motors is formed between both ends of the support frame and the fixed seat.

Preferably, the front side and the rear side of the support frame are respectively provided with a support rod, the front position and the rear position of the up-down lifting motor on the fixing seat are respectively provided with a support, a groove formed in the support is used for supporting the support rods, and the groove supports the whole support frame.

Preferably, the rotating shuttle fixing seat of the rotating shuttle component is fixed, a thread stand is placed in the rotating shuttle fixing seat, an anti-skid cover plate is arranged on the outer side of the thread stand, and the hollow rotating shaft of the rotating shuttle component, which is provided with a rotating shuttle power source, drives a crochet hook to hook a sewing upper thread on a machine needle and forms a hitch with a sewing lower thread of the thread stand in the suspended rotating shuttle.

Preferably, the hollow rotating shaft of the rotating shuttle power source is fixedly connected with the hook needle, the hollow rotating shaft of the rotating shuttle power source is sleeved on a fixed rod connected with the rotating shuttle fixed seat, the running track of the hook needle is concentrically arranged with the fixed rod, and the fixed rod is concentrically arranged with the thread stand.

Preferably, the thread cutting power source pushes the thread cutting connecting rod, and the thread cutting connecting rod is pushed to rotate by the rotating shuttle power source so that the tail end mechanism performs thread cutting.

Preferably, a push block arranged at the front end of the trimming connecting rod reaches a notch formed in the hollow rotating shaft, the trimming connecting rod generates thrust on the secondary push broach connecting rod and the main push broach connecting rod, and the main push broach knife rest and the push broach knife rest are respectively connected with the main knife and the push secondary knife.

Preferably, the thread trimming connecting rod is provided with a connecting rod end hinged with the main thread pushing connecting rod, the secondary thread pushing connecting rod is hinged with the middle position of the thread trimming connecting rod, the middle position of the thread trimming connecting rod is also provided with a sliding groove, the sliding groove is matched with a sliding rod arranged on the rotating shuttle power source or the thread trimming power source support, and the spring thread trimming power source support and the thread trimming connecting rod are also provided with springs.

Preferably, the operation panel starts the thread cutting action when the rotary shuttle power source operates for the last circle, and the thread cutting power source immediately rebounds to the original position after the thread cutting action is completed.

Preferably, the frame is further provided with an outer presser foot mechanism having an outer presser foot for pressing a sewing material around the presser foot provided in the sewing machine.

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

Preferably, the outer presser foot drive source is mounted and fixed to a long arm end of a frame provided in the sewing machine.

Preferably, a lifting device is further arranged between the bedplate and the frame of the flat sewing machine, the lifting device is used for lifting the height of the frame, a lifting power source of the lifting device is mounted on the bedplate, and the frame is fixed at the upper end of a lifting rod of the lifting power source.

Preferably, the frame of the lockstitch sewing machine is further provided with a rotating device, the rotating device is provided with a frame rotating power source which is arranged between the frame (30) and the bedplate, and the frame rotating power source is started to drive the frame to rotate.

The application provides a disconnect-type flush joint machine possess separately independent operation mechanism and the bottom line mechanism of going up, will go up line mechanism and bottom line mechanism ingeniously and make the separation on mechanical transmission, cancelled traditional linkage mechanical transmission structure from top to bottom, realized that flush joint machine mechanical transmission mechanism does not need lubricated oily chemical industry, bottom line mechanism not only has the advantage that the practicality is high, the commonality is strong, moreover, bottom line mechanism can make into the supporting use of modularization on various flush joint machines. The application discloses disconnect-type lockstitch sewing machine furthest has improved transmission efficiency, has further realized the intelligent control of sewing, has made subversive technical reform on structure and mechanical transmission very much, makes mechanical structure simplify more and has reduced sewing machine's manufacturing cost by a wide margin, has higher spreading value.

Drawings

FIG. 1 is a schematic structural view of a split lockstitch sewing machine of the present application;

FIG. 2 is a schematic view of a thread feeding mechanism and a thread backing mechanism of a separate type lockstitch sewing machine according to the present application;

FIG. 3 is a schematic view of a bobbin thread mechanism of a split lockstitch sewing machine of the present application;

FIG. 4 is a schematic view of a feed dog assembly of a split lockstitch machine of the present application;

FIG. 5 is a schematic view of a first feed lifting cam and a second feed lifting cam of a split lockstitch sewing machine according to the present application;

FIG. 6 is a rear view of a feed dog assembly of a split lockstitch machine of the present application;

FIG. 7 is a schematic view of a feed dog and feed dog attachment of a split lockstitch machine of the present application;

FIG. 8 is a schematic view of a thread trimmer assembly of a split lockstitch sewing machine of the present application;

FIG. 9 is a schematic view of a thread trimming pusher of a split flat bed sewing machine of the present application;

FIG. 10 is an internal configuration view of a thread trimming push rod of a divided sewing machine of the present application;

FIG. 11 is a schematic view of a rotary shuttle assembly of a split lockstitch machine of the present application;

FIG. 12 is a schematic illustration of a guide rail of a split lockstitch machine of the present application;

FIG. 13 is a schematic illustration of a pattern stitch of a split bed sewing machine of the present application;

FIG. 14 is a schematic view of an intermittent pattern stitch for a split bed sewing machine of the present application.

Reference numerals are as follows: an upper thread mechanism 10, a machine head 11, a needle rod assembly 15, a machine needle 152, a power source 153, a rotating disc 154, a movable connecting rod 155, a machine needle crank 156, a pressure raising and pressing foot assembly 16, a pressure foot 161, a pressure raising and pressing foot power source 162, a pressure foot cam 163, a cam action plate 164, a first spring 165, a pressure foot rod 166, an outer pressure foot mechanism 18, an outer pressure foot 181, an outer pressure foot connecting rod 182, a fixing plate 183, an outer pressure foot power source 184, a lower thread mechanism 20, a fixing seat 23, a feed dog assembly 25, a feed dog 251, an up-and-down lifting motor 252, a front-and-back feed motor 253, a feed dog connecting frame 254, a supporting frame 255, a feed dog cam I256, a feed dog cam II 257, a needle plate 258, a fixing copper bush 259, a driving end swinging rod 25a, a copper bush swinging rod 25b, a rotating disc 25e, a connecting rod 25f, a bracket 250, a supporting rod 25c, a groove 25d, a rotating shuttle assembly 26, a suspension rotating shuttle 261, a rotating shuttle power source 262, the thread take-up device comprises a notch 26c, a crochet 263, a fixing rod 264, a rotating shuttle fixing seat 265, an anti-slip cover plate 266, a hollow rotating shaft 267, a thread stand 268, a thread cutting assembly 27, a thread cutting power source 271, a thread cutting connecting rod 272, a push block 272a, a connecting rod end 272b, a sliding groove 272c, a thread cutting power source support 27e, a spring 273, a main knife 274, a main knife connecting rod 275, a secondary knife 276, a thread cutting support 277, a main knife rest 278, a secondary knife connecting rod 279, a knife rest 270, a rack 30, a long arm end 31, an operation panel 40, a controller 50, a bedplate 60, a lifting power source 70, a lifting rod 71, a rack rotating power source 72, a main guide rail 81, a secondary guide rail 82, a working guide rail 83, a thread take-up assembly 90, a thread take-up secondary disc 91, a take-up disc 92, a take-up column 921, a thread pulling groove, a thread take-up connecting rod 93, a first thread gripper 94, a second thread gripper 95 and a thread gripper rotating shaft 96.

Detailed Description

The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, is provided to enable those skilled in the art to more readily understand the advantages and features of the present application, and is intended to more clearly and distinctly define the scope of the invention, which is set forth by way of illustration only and is not intended to be limiting of the invention.

FIG. 1 and FIG. 2 are schematic views of a split type lockstitch sewing machine according to the present application, which has an upper thread feeding mechanism 10, a lower thread feeding mechanism 20, a frame 30, an operation panel 40, a controller 50, and a table 60. The thread feeding mechanism 10 and the operation panel 40 are fixed on the frame 30, and specifically, the thread feeding mechanism 10 is fixed on the long arm end 31 of the frame 30. The bobbin thread mechanism 20 is fixed under the bedplate 60, the operation panel 40 is fixed in the middle of the stander 30, the operation surface of the operation panel 40 faces to an operator, and the stander 30 is fixed on the bedplate 60.

The thread feeding mechanism 10 and the bottom thread mechanism 20 form a sewing system with a flat sewing machine function, and the thread feeding mechanism 10 is fixed with the frame 30 at the long arm end 31 of the frame 30 or is of an integrated structure; the bottom thread mechanism 20 is arranged on one side of the bedplate 60 close to the thread feeding mechanism 10, the bottom thread mechanism 20 is provided with a fixed seat 23, at least a needle bar assembly 15, a pressure foot lifting assembly 16 and a thread take-up assembly 90 are arranged in the fixed seat 23, and the fixed seat 23 is fixed below the frame 30. Above-mentioned no mechanical transmission between mechanism and the frame of going up the line is connected, and the mechanical transmission on the bedplate is not connected to bottom line mechanism, and the disconnect-type intelligence flush joint machine of this application is structurally the separation, also separates from top to bottom on mechanical transmission.

The present application provides for the bobbin thread mechanism 20 to be made modular for convenient installation and use on a variety of different models. The flat sewing machine that this application has optimized has simple structure advantage, and flat sewing machine drive mechanism adopts the design that the disconnect-type has the pioneering nature.

The thread feeding mechanism 10 of the flat sewing machine is provided with a machine head 11, and the machine head 11 is fixed on a frame 30. The needle threading mechanism 10 at least comprises a needle bar assembly 15, a lifting and pressing foot assembly 16 and a thread picking assembly 90, wherein the needle bar assembly 15, the lifting and pressing foot assembly 16 and the thread picking assembly 90 cooperatively operate together in the sewing process to realize needle threading and sewing tasks.

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 disc 154 to rotate, and a moving link 155 is connected to an eccentric position of the rotating disc 154, and the moving link 155 drives the rotating disc 154 to reciprocate the needle 152 up and down.

The presser foot lifting assembly 16 has a presser foot 161, a presser foot lifting power source 162, a presser foot cam 163, a cam action plate 164, a presser foot lever 166, and a first spring 165. The presser foot lifting power source 162 drives the presser foot cam 163 to rotate, the presser foot cam 163 acts on a cam action plate 164 arranged on the upper portion of a presser foot rod 166, a first spring 165 is arranged between the cam action plate 164 and the machine head 11, the first spring 165 is sleeved on the presser foot rod 166, and the presser foot lifting power source 162 drives the related components to lift the presser foot 161. In the present application, the presser foot 161 is in a normal pressure state, and when the presser foot is to be lifted, the presser foot lifting power source 162 rotates to separate the presser foot cam 163 from the cam acting plate 164, and the first spring 165 pushes the cam acting plate 164 upward to lift the presser foot 161. When pressing the presser foot, the presser foot cam 163 is separated from the cam action plate 164, and the first spring 165 pushes the presser foot rod 166 to keep the presser foot 161 pressed down; during sewing, the first spring 165 always gives a maintained elastic force to the presser foot 161 between the cam plate 164 and the machine head 11 to realize the normal pressure of the presser foot.

In fig. 2 to 8, a feed dog assembly 25, a rotating shuttle assembly 26 and a thread trimming assembly 27 are provided inside the fixed base 23 of the bobbin thread mechanism 20. The feed dog assembly 25 comprises a feed dog 251, a support frame 255, a support frame 250, a feed dog connecting frame 254, an up-down lifting motor 252 and a front-back feed motor 253, wherein the front-back feed motor 253 is fixed at the rear side of the fixed seat 23, and the output end of the front-back feed motor 253 is sleeved on a driving end swinging rod 25a of the feed dog connecting frame 254.

The up-down lifting motor 252 is fixed at the bottom of the fixing seat 23, 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. The front and rear cloth feeding motors 253 and the fixed copper sleeves 259 are arranged at two ends of the upper part of the supporting frame 255, and a gap which is enough to meet the swinging of the front and rear cloth feeding motors 253 is formed between the two ends of the supporting frame 255 and the fixed seat 23. The front side and the rear side of the support frame 255 are respectively provided with a support rod 25c, the front position and the rear position of the up-down lifting motor 252 on the fixed seat 23 are respectively provided with a support frame 250, a groove 25d arranged at the top of the support frame 250 is used for supporting the support rod 25c, and the groove 25d holds the whole support frame 255, so that the feed dog assembly 25 swings left and right in the groove 25 d. The up-down lifting motor 252 controlled by the operation panel 40 rotates to drive the first feed lifting cam 256 and the second feed lifting cam 257 to rotate, and the support frame 255 swings up and down to meet the requirement of the feed dog 251 due to the fact that the first feed lifting cam 256 and the second feed lifting cam 257 have the characteristic of unequal diameters, so that the feed dog 251 is driven to swing up and down.

The upper part of the feed dog connecting frame 254 is connected with a feed dog 251, and a copper sleeve 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 matched with the copper sleeve swinging rod 25b and the driving end swinging rod 25 a. The feed dog connecting frame 254 is movably connected with a connecting rod 25f, the connecting rod 25f is movably connected with a rotary disc 25e, the connecting rod 25f is movably connected with an eccentric position of the rotary disc 25e, and the rotary disc 25e is fixed on an output shaft of the front and rear feed motors 253. The front and rear feed motors 253 controlled by the operation panel 40 drive the rotary plate 25e and then drive the link 25f, so that the feed dog link 254 makes a swing source satisfying the leftward and rightward swing motion of the feed dog 251, thereby driving the feed dog 251 to swing leftward and rightward. The horizontal swing motion of the front and rear feed motors 253 and the vertical swing motion of the vertical lift motor 252 are transmitted to the feed dog 251 through the feed dog link 254 under the control of the operation panel 40, so that the feed dog 251 is formed in an operating state, and the feed motion of the feed dog 251 of the lockstitch sewing machine is realized.

The fixed seat 23 further has a needle plate 258 integrally connected to the fixed seat 23, the fixed seat 23 rotates together with the needle plate 258, and the feed dog 251 of the feed dog assembly 25 operates in the needle plate 258. The up-down lifting motor 252 and the front-back cloth feeding motor 253 are controlled by the operation panel 40 to realize programmed control on the adjustment of the sewing needle pitch, overcome the traditional method for adjusting the needle pitch of the original flat sewing machine and have the technical value of time-lapse.

In fig. 8, 9 and 10, the thread trimming assembly 27 includes a rotary shuttle power source 262, a hollow 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, a main push-knife link 275, a sub-knife 276, a thread trimming holder 277, a main push-knife holder 278, and a sub-push-knife link 279. When the sewing is finished, the operating panel 40 can start the thread cutting action when the rotating shuttle power source 262 rotates for the last circle, firstly, the thread cutting power source 271 is started to push the thread cutting connecting rod 272, the push block 272a arranged at the front end of the thread cutting connecting rod 272 reaches the gap 26c arranged on the hollow rotating shaft 267, so that the rotating hollow rotating shaft 267 drives the thread cutting connecting rod 272 to rotate, and the rotating thread cutting connecting rod 272 pushes the thread cutting end mechanism to execute the thread cutting action. The rotating shear link 272 exerts a pushing force on the secondary push knife link 279 and the primary push knife link 275, thereby causing the primary push knife holder 278 and the push knife holder 270. The main push-type broach tool rest 278 and the push-type broach tool rest 270 are respectively connected with the main knife 274 and the push-type secondary knife 276, and the lower main knife 274 and the push-type secondary knife 276 are pushed oppositely by the main push-type broach tool rest 278 and the push-type broach tool rest 270 to complete the thread cutting action. The thread trimming link 272 has a link end 272b hinged to the main push link 275, a sub push link 279 hinged to a middle portion of the thread trimming link 272, and a slide groove 272c formed in the middle portion of the thread trimming link 272, the slide groove 272c is matched with a slide rod 262a provided on the rotating shuttle power source 262 or the thread trimming power source holder 27e, and the thread trimming power source holder 27e and the thread trimming link 272 are provided with a spring 273. The thread cutting power source 271 is returned to the original position immediately after the thread cutting operation is completed, and the thread cutting link 272, the main knife 274 and the push sub-knife 276 are also returned to the original position.

Referring to fig. 10 and 11, the rotating shuttle assembly 26 has a floating rotating shuttle 261, a rotating shuttle fixing seat 265, an anti-slip cover plate 266, a thread stand 268, a rotating shuttle power source 262 and a hook 263. This flush joint machine is that rotating shuttle fixing base 265 is the rigid when making up, and rotating shuttle fixing base 265 has placed line frame 268 inside, and the line frame 268 outside is provided with anti-skidding cover plate 266, and anti-skidding cover plate 266 is used for the line frame 268 roll-off. The rotating shuttle power source 262 drives the hook needle 263 to hook the upper sewing thread on the needle 152 and form a hitch with the lower sewing thread of the thread frame 268 in the floating rotating shuttle 261. The hook 263 is fixedly connected to the hollow shaft 267 of the rotating shuttle power source 262, the hollow shaft 267 of the rotating shuttle power source 262 is sleeved on the fixed rod 264 of the rotating shuttle fixing seat 265, the operation track of the hook 263 is concentrically arranged with the fixed rod 264, and the fixed rod 264 is concentrically arranged with the bobbin 268. The suspension rotating shuttle 261 and the rotating shuttle fixing seat 265 have a sliding line gap and a positioning arrangement, and the suspension rotating shuttle 261 and the anti-slip cover plate 266 have a sliding line gap.

In fig. 12, the flat bed sewing machine of the present application has a cloth positioning device having a main rail 81, a sub rail 82, and a working rail 83. The main guide rail 81 is fixedly arranged on the bedplate 60, the auxiliary guide rail 82 is movably connected to the main guide rail 81, and one end of the auxiliary guide rail 82 operates in the limit of the main guide rail 81; the work guide 83 is located on the outer periphery of the feed dog 251, one side of the work guide 83 is movably connected to the sub guide 82, and the work guide 83 operates within the limit of the sub guide 82. During sewing, the cloth is configured and fastened on the working guide rail 83, the working guide rail 83 moves along with the change of sewing stitches, specifically, the transverse stitches are formed by the working guide rail 83 operating within the range of the auxiliary guide rail 82, the longitudinal stitches are formed by the auxiliary guide rail 82 operating within the range of the main guide rail 81, and other stitches are formed by the auxiliary guide rail 82 and the main guide rail 81 operating cooperatively, so that the pattern sewing of the flat sewing machine has higher controllability.

In fig. 13 and 14, the thread take-up assembly 90 of the split sewing machine of the present application has a secondary take-up reel 91, a take-up reel 92, a rotation shaft 96, a first gripper 94, a second gripper 95, a thread take-up link 93, a power source 153 and a rotation disc 154. The eccentric position of the take-up reel 92 is fixedly provided with a take-up column 921, the take-up column 921 is provided with a pull groove 922, a sewn upper thread is led to the pull groove 922 of the take-up column 921 from a position between a first thread clamping device 94 and a second thread clamping device 95 and sleeved on the pull groove 922, the take-up reel 92 and the take-up column perform circular operation, and the take-up column 921 performs take-up or pay-off of the sewn upper thread with the change of the position of the take-up column 921 during the circular operation. The rotating disc, the take-up auxiliary disc and the take-up disc of the take-up assembly are arranged concentrically, and a connecting shaft connected with the center is arranged between the take-up auxiliary disc and the take-up disc. The take-up reel 92 and the take-up auxiliary reel 91 are connected and driven by a take-up rotating shaft 96, and the rotating disc 154 and the take-up auxiliary reel 91 are both provided with synchronous take-up connecting rods 93 at eccentric positions. When the power source 153 drives the lower rotary disc 154 to rotate continuously, the rotary disc 154 drives the thread take-up connecting rod 93, the thread take-up connecting rod 93 drives the needle 152 and the thread take-up sub-disc 91 to operate simultaneously, and the thread take-up disc 92 finally drives the thread take-up column 921 to perform thread take-up work. The wire take-up sub-disc 91 thus drives the wire take-up disc 92 to operate through the wire take-up rotating shaft 96. The thread take-up assembly 90 is simple in structure, the thread take-up speed is consistent with the operation of the needle 152, so that the thread take-up and release of sewing upper threads are more accurate, and the intelligent control level of the lockstitch sewing machine is improved.

It should be noted that the rotation of the take-up reel 92 is not limited to the above-mentioned transmission mechanism, and it is sufficient to claim that the take-up reel 92 of the present application can be driven to rotate circularly.

Fig. 14 shows that the lockstitch sewing machine of the present application further has an external presser foot mechanism 18, and 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 external presser foot power source 184 is fixedly mounted on the frame 30, the external presser foot power source 184 drives the external presser foot 181 to press the sewing cloth on the platen 60, and the external presser foot 181 prevents the cloth from sliding to affect the next sewing manufacturing process in the sewing state. The outer presser foot 181 is pressed around the presser foot 161, or is circular or square, and the like, and in short, the presser foot 161 is within the pressing range of the outer presser foot 181. The outer presser foot 181 is connected with an outer presser foot connecting rod 182, the outer presser foot connecting rod 182 is connected with a fixing plate 183, the fixing plate 183 is connected with an output shaft of an outer presser foot power source 184, the outer presser foot power source 184 executes telescopic operation to drive the fixing plate 183 to move, and pressing or releasing of the outer presser foot 181 on sewing cloth is realized.

In fig. 1, a lifting device is further provided between the bedplate 60 and the frame 30 of the flat bed sewing machine, the lifting device is used for lifting the height of the frame 30, when thick cloth needs to be sewn, the frame 30 can be lifted, after the cloth is placed, the frame 30 is lowered to the original height, and then sewing can be performed. Specifically, the lifting power source 70 is installed on the platen 60, the frame 30 is fixed to the upper end of the lifting rod 71 of the lifting power source 70, and the lifting power source 70 is started to lift the lifting rod 71, so that the frame 30 is lifted.

In fig. 1, the frame 30 of the flat bed sewing machine is further provided with a rotating device, the rotating device rotates the frame 30 on the bedplate 60, the purpose is to rotate the frame 30 and the needle threading mechanism 10 together for a certain angle to meet the requirement of special sewing, and after cloth is placed, the frame 30 is returned to the original position to carry out sewing. The gantry rotation power source 72 is installed between the gantry 30 and the platen 60, and the gantry rotation power source 72 is activated to rotate the gantry 30.

In conclusion, the upper thread mechanism 10 and the lower thread mechanism 20 constitute a sewing system having a flat sewing machine function, and realize the conventional sewing function of the flat sewing machine.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the present specification and drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present 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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