CN213804264U

CN213804264U - Feed dog subassembly of disconnect-type sewing machine

Info

Publication number: CN213804264U
Application number: CN202022830701.1U
Authority: CN
Inventors: 林子春; 刘霖; 吴文俊; 潘林勇; 林群; 李质彬; 刘冰
Original assignee: Qixing Intelligent Technology Co Ltd
Current assignee: Qixing Intelligent Technology Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-07-27
Anticipated expiration: 2030-11-30

Abstract

The application provides a disconnect-type sewing machine's feed dog subassembly, concretely relates to sewing machine manufacturing technical field. The cloth feeding tooth assembly is provided with an up-down lifting motor and a front-back cloth feeding motor which apply a non-lateral swinging source to the cloth feeding tooth, the up-down lifting motor and the front-back cloth feeding motor indirectly act on the cloth feeding tooth to perform cloth feeding action, the front-back cloth feeding motor drives the rotary table to drive the connecting rod, the connecting rod is movably connected to the eccentric position of the rotary table, and the connecting rod is movably connected with the cloth feeding tooth connecting frame. The cloth feeding tooth assembly is transmitted and swung by the up-down lifting motor and the front-back cloth feeding motors, can be additionally arranged on the bottom thread mechanism, can be manufactured into a modularized matching mode to be used on various sewing machines, and has high popularization value.

Description

Feed dog subassembly of disconnect-type sewing machine

Technical Field

The application provides a disconnect-type sewing machine's feed dog subassembly, concretely relates to sewing machine manufacturing technical field.

Background

A sewing machine is a sewing machine for sewing clothes, bags, shoes, hats, clothes, and the like. A main shaft motor of the traditional 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 bevel gear and a needle rod crankshaft which are fixedly connected with the upper main shaft to simultaneously operate. 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 cloth feeding shaft and the feed lifting tooth shaft are arranged on two sides of the sewing machine base, and the cloth feeding shaft and the feed lifting tooth shaft are connected with a cloth feeding tooth frame in the middle through a crank. The cloth feeding shaft and the feed lifting shaft transmit swing sources to the cloth feeding tooth rack from two sides of the cloth feeding tooth rack, the swing of the cloth feeding shaft drives the tooth rack fixedly connected to the cloth feeding shaft to swing approximately in the horizontal direction for the cloth feeding teeth, 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 for the cloth feeding teeth, and the obtained cloth feeding teeth form a feed conveying teeth running track by combining horizontal front-back direction swing and vertical up-down direction swing. 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 machine actually realizes the cooperative cloth feeding of the feed dog, the presser foot and the machine needle by the eccentric rotating wheel, the bevel gear and the needle bar crankshaft on the main shaft driven by the main shaft motor in the sewing process, and is matched with the sewing process of rotating shuttle operation. The traditional up-and-down linkage transmission mechanism of the sewing machine is complex, on one hand, the noise of the sewing machine is caused, on the other hand, the requirements on the manufacturing standard of mechanical transmission parts of the sewing machine are higher, and particularly, the requirements on the rotating shuttle playing a key role in sewing the lower thread outlet are higher. Since the traditional mechanical transmission structure of the sewing machine is available, a feasible scheme is needed to improve the transmission efficiency of the sewing machine so as to overcome the technical defects and simultaneously achieve the aims of reducing the manufacturing difficulty of the sewing machine, reducing the manufacturing cost of the sewing machine and improving the intelligent control level of the sewing machine.

Disclosure of Invention

To the complicated problem of feed dog mechanical transmission structure that current sewing machine exists, this application provides a transmission efficiency is high, makes the disconnect-type sewing machine's that the degree of difficulty is low feed dog subassembly, has the oscilaltion motor that feed dog subassembly has and front and back feed motor, the oscilaltion motor indirectly acts on feed dog link and feed dog, the oscilaltion motor indirectly acts on the bottom of support frame, support frame and feed dog link movable fit.

Preferably, the output shafts at the two ends of the up-down lifting motor are respectively provided with a first feed lifting gear cam and a second feed lifting gear cam, and the first feed lifting gear cam and the second feed lifting gear cam respectively act on two convex blocks at the bottom of the cloth feeding gear assembly with the supporting frame.

Preferably, the up-down lifting motor is fixed on a base plate of the sewing machine.

Preferably, the front and rear cloth feeding motors drive the rotating disc to drive the connecting rod, the connecting rod is movably connected to the eccentric position of the rotating disc, and the connecting rod is movably connected with the cloth feeding tooth connecting frame.

Preferably, the copper bush swinging rods arranged at the two ends of the feed dog connecting frame and the driving end swinging rods are respectively arranged on the fixed copper bushes arranged at the two ends of the supporting frame, the feed dog is connected above the feed dog connecting frame, and the front and rear feed motors are fixed on the upper part of the supporting frame arranged on the sewing machine.

Preferably, the front side and the rear side of the support frame are respectively provided with a support rod, the support rods are respectively provided with a support at the front position and the rear position of an up-down lifting motor fixed on the bottom plate, and the top of the support is provided with a groove.

Preferably, a multi-stage cam I and a multi-stage cam II are mounted on output shafts at two ends of the up-down lifting motor, and both the multi-stage cam I and the multi-stage cam II are provided with a plurality of adjusting high points and a plurality of adjusting low points.

Preferably, the high point and the low point of the multi-stage cam I and the multi-stage cam II are installed at two ends of the up-down lifting motor in a staggered mode.

Preferably, the adjusting high points of the first multi-stage cam and the second multi-stage cam are adjacent to the adjusting low points.

The utility model provides a disconnect-type sewing machine's feed dog subassembly has cancelled traditional linkage mechanical transmission structure from top to bottom, utilizes the oscilaltion motor and around feed motor to the feed dog subassembly transmission source of swinging, has realized sewing machine's feed dog oilless work, realizes ingeniously that upper thread mechanism and lower thread mechanism make the separation on mechanical transmission, and the feed dog subassembly can be installed additional and can make the modularization supporting use on various sewing machines at lower thread mechanism. The split type sewing machine feed dog assembly improves the transmission efficiency to the maximum extent, and further realizes intelligent control of the sewing feed dog assembly, so that the sewing machine mechanical structure is simplified, the sewing transmission efficiency is higher, and the split type sewing machine feed dog assembly has higher popularization value.

Drawings

FIG. 1 is a schematic view of a feed dog assembly of a split sewing machine according to the present application;

FIG. 2 is a structural view of a lower thread mechanism of a feed dog assembly of a separate sewing machine according to the present application;

FIG. 3 is a schematic view of a feed dog assembly of a split-type sewing machine of the present application;

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

FIG. 5 is a schematic view of a feed dog assembly of a split sewing machine of the present application;

FIG. 6 is a multi-stage cam schematic of a feed dog assembly of a split sewing machine according to the present application;

FIG. 7 is a rear angled feed schematic of a feed dog of a split sewing machine of the present application;

FIG. 8 is a schematic view of the front angled feed of a feed dog of a split sewing machine of the present application;

FIG. 9 is a schematic view of a rotary hook assembly of a feed dog assembly of a split sewing machine according to the present application;

FIG. 10 is a view showing a configuration of a rotary hook assembly of a feed dog assembly of a split sewing machine according to the present application;

FIG. 11 is a schematic view of a thread trimming assembly of a feed dog assembly of a split sewing machine according to the present application;

FIG. 12 is an internal configuration view of a thread trimmer assembly of a feed dog assembly of a split sewing machine according to the present application;

FIG. 13 is a schematic view of a thread trimming pusher of a feed dog assembly of a split sewing machine according to the present application;

FIG. 14 is a schematic view of a thread take-up assembly of a feed dog assembly of a split sewing machine according to the present application;

FIG. 15 is a thread take-up reel of a feed dog assembly of a split sewing machine according to the present application.

Reference numerals: a thread feeding mechanism 10, a needle bar 11, a machine needle 12, a bottom thread mechanism 20, a fixed seat 21, a bottom plate 211, a feed dog assembly 25, a feed dog 251, an up-down lifting motor 252, a front-back feed motor 253, a feed dog connecting frame 254, a supporting frame 255, a bottom portion 2551, a feed dog cam I256, a feed dog cam II 257, a needle plate 258, a fixed copper sleeve 259, a driving end swinging rod 25a, a copper sleeve 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 bottom thread driving motor 262, a notch 262c, a hook needle 263, a fixed rod 264, a rotating shuttle fixed seat 265, an anti-slip cover plate 266, a hollow rotating shaft 267, a thread frame 268, a thread trimming assembly 27, a thread trimming driving source 271, a thread trimming push rod 272, a push block 272a, a connecting rod end 272b, a sliding groove 272c, a thread trimming driving source bracket 27e, an elastic piece 273, a push blade 274, a push plate connecting rod, the secondary push broach 276, the trimming bracket 277, the push broach seat 278, the push broach connecting rod seat 279, the secondary push broach connecting rod seat 270, the bump 28, the platen 30, the machine head 40, the spindle motor 41, the platen 30, the controller 60, the control panel 61, the base 70, the thread take-up assembly 80, the thread take-up sub-disc 81, the thread take-up disc 82, the thread take-up column 821, the thread pull groove 822, the thread take-up connecting rod 83, the first thread clamp 84, the second thread clamp 85, the thread take-up rotating shaft 86, the first multi-stage cam 91, the second multi-stage cam 92, the high point adjustment 912 and the low point adjustment 913.

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 is a schematic view showing a feed dog assembly of a separate type sewing machine according to the present application. The sewing machine of the present application has a head 40, a table 30, and a base 70. The above-mentioned aircraft nose 40 has the upper thread organization 10, spindle motor 41 and controller 60, the control panel 61 that the controller 60 has is installed on the front of the aircraft nose 40; the lower thread mechanism 20 is installed under the table 30, and the upper thread mechanism 10 and the lower thread mechanism 20 are two sewing mechanisms independently installed in the sewing machine. The thread feeding mechanism 10 is driven by a spindle motor 41; the bobbin thread mechanism 20 has a plurality of driving sources which operate independently, and the plurality of driving sources collectively perform the bobbin thread sewing operation, in other words, the bobbin thread mechanism 20 does not receive power from the spindle motor 41.

The mechanical transmission mode of the sewing machine is separated from the upper part and the lower part, and the upper thread mechanism 10 and the lower thread mechanism 20 are provided with respective operation power devices. The feed dog assembly of the split sewing machine adopts a mechanical transmission split structure, the upper thread mechanism 10 basically keeps the structure of the original sewing machine, the lower thread mechanism 20 is greatly changed, and particularly the feed dog assembly 25 and the rotating shuttle assembly 26 are subversive. The sewing machine can realize the sewing operation of the bottom thread by adopting a plurality of miniature driving sources, realizes the small-sized modular manufacture of the bottom thread mechanism 20, is suitable for the installation and the use of various sewing machines with different styles, ensures that the sewing machine has a simplified mechanical transmission structure, and does not need to provide a lubricating system during the operation of the mechanical transmission structure.

Fig. 2 and 3 are schematic structural views of a lower thread mechanism 20 of a feed dog assembly of a split sewing machine according to the present application. The bobbin thread mechanism 20 has a feed dog assembly 25, a rotating shuttle assembly 26 and a thread cutting assembly 27, the bobbin thread mechanism 20 is disposed inside a fixed base 21, and the fixed base 21 is fixedly installed below a platen 30. The bobbin thread mechanism 20 is installed on the side of the platen 30 close to the thread feeding mechanism 10.

In fig. 2, fig. 3, fig. 4 and fig. 5, the feed dog assembly 25 of the present application has an up-down motor 252 and a front-back feed motor 253, and the feed motion of the feed dog is realized by means of the up-down motor 252 and the front-back feed motor 253 simultaneously and cooperatively outputting a swing source. The two swing driving sources implement non-lateral transmission of the swing source to the feed dog 251 to realize the feeding action of the feed dog, and the feeding action of the feed dog of the existing sewing machine is realized by receiving the swing sources from two sides of the feed dog, which is the remarkable characteristic that the swing sources of the application are different from the prior art. The two swing driving sources indirectly act on the feed dog 251 to realize the feed action, wherein the lower lifting motor 252 indirectly acts on the feed dog connecting frame 254 and the feed dog 251, and the feed dog assembly 25 specifically implemented comprises the upper lifting motor 252, the lower lifting motor 253, the front and rear feed motors 253, a supporting frame 255, the feed dog connecting frame 254, a bracket 250, a first driving feed lifting cam 256, a second drive lifting cam 257 and the like. And a first drive feed lifting cam 256 and a second feed lifting cam 257 are mounted on output shafts at two ends of the up-down lifting motor 252.

The up-down lifting motor 252 is fixed on a bottom plate 211 of the fixed seat 21, the up-down lifting motor 252 indirectly acts on a bottom portion 2551 of the supporting frame 255, and a first drive feed lifting cam 256 and a second drive feed lifting cam 257 are mounted at two ends of the up-down lifting motor 252 and are arranged on two sides of the fixed seat 21. The first feed lifting cam 256 and the second feed lifting cam 257 respectively act on the two lugs 28 on the two sides of the bottom of the support frame 255. The front and rear sides of the support frame 255 are respectively provided with a support rod 25c, a bracket 250 is fixed on the bottom plate 211, the bracket 250 is positioned at the front and rear parts of the up-down lifting motor 252, a groove 25d is formed at the top of the bracket 250 and used for supporting the support rod 25c, and the whole support frame 255 is supported by the groove 25 d. The up-down lifting motor 252 controlled by the controller 60 rotates to drive the first feed lifting cam 256 and the second feed lifting cam 257 to rotate, and the first feed lifting cam 256 and the second feed lifting cam 257 have the structural characteristics of unequal diameters, so that the support frame 255 can swing up and down to meet the requirement of the feed dog 251 and is limited in the groove 25d, and the feed dog 251 can be driven to swing up and down.

A back and forth swing device is installed on an output shaft of the front and rear cloth feeding motor 253 to realize the back and forth swing motion of the cloth feeding dog 251. The above-mentioned support 255 and the feed dog link 254 are movably fitted, and the back-and-forth swing device of this embodiment is specifically: the fixed copper sleeves 259 are provided at both ends of the upper portion of the support frame 255, and the front and rear cloth feeding motors 253 are provided at the sides of the support frame 255. The feed dog 251 is fixedly connected to the upper side of the feed dog connecting frame 254, and the copper bush swinging rod 25b and the driving end swinging rod 25a which are arranged at the two ends of the feed dog connecting frame 254 are respectively arranged on the fixed copper bushes 259 which are arranged at the two ends of the supporting frame 255, namely the feed dog connecting frame 254 is movably matched with the supporting frame 255. 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 the eccentric position of the rotary disc 25e, and the rotary disc 25e is fixed on the output shaft of the front and rear feed motors 253. The front and rear feed motors 253 controlled by the controller 60 drive the rotary disc 25e to drive the connecting rod 25f, and the movable connecting rod 25f swings to enable the feed dog connecting frame 254 to swing back and forth to meet the feeding requirement of the feed dog 251, so that the feed dog 251 swings back and forth.

Under the control of the controller 60, the forward and backward swinging motion of the forward and backward feed motor 253 and the upward and downward swinging motion of the upward and downward elevating motor 252 are transmitted to the feed dog 251 through the feed dog link 254, and are also restricted in the groove 25d, thereby forming a feed dog 251 in a feed motion state, and realizing the feed motion of the feed dog 251 of the sewing machine.

The fixing seat 21 further has a needle plate 258 connected with the fixing seat 21 as a whole, and the feed dog 251 operates in the needle plate 258.

The vertical movement source transmitted from the vertical movement motor 252 and the front and rear movement sources transmitted from the front and rear cloth feeding motors 253 are indirectly acted on the cloth feeding dog 251 together by the vertical movement motor 252 and the controller 60, thereby realizing the cloth feeding action of the cloth feeding dog 251 of the sewing machine. The up-down lifting motor 252 and the front-back cloth feeding motor 253 are controlled by the controller 60 to realize programmed control on the adjustment of the sewing needle pitch, so that the traditional method for adjusting the needle pitch of the original sewing machine is overcome, meanwhile, the separation of a mechanical transmission mechanism of the sewing machine is realized, the technical defect that the complex mechanical transmission mechanism of the existing sewing machine needs a lubricating system for paving when the mechanism is operated is overcome, the manufacturing difficulty of the sewing machine is greatly reduced, and the sewing machine has epoch-making technical value.

Fig. 6 and 8 show a schematic view of a first multi-stage cam 91 and a second multi-stage cam 92 of the feed dog assembly 25 of the present application. The multi-stage cam one 91 and the multi-stage cam two 92 have the same shape and size, but the multi-stage cam one 91 and the multi-stage cam two 92 are installed at both ends of the up-down moving motor 252 at different positions and angles. The multi-stage cam one 91 and the multi-stage cam two 92 each have a plurality of adjustment high points 912 determining the highest position of the feed dog 251 and a plurality of adjustment low points 913 determining the lowest position of the feed dog 251, and the adjustment high points 912 are adjacent to each other with the adjustment low points 913. On the output shaft installed at the two ends of the up-down lifting motor 252, the high adjusting point 912 and the low adjusting point 913 of the multi-stage cam I91 and the multi-stage cam II 92 are installed at the two ends of the up-down lifting motor 252 in a staggered mode, namely the high adjusting point 912 is not installed corresponding to the high adjusting point 912, and the high adjusting point 912 is installed corresponding to the low adjusting point 913.

In fig. 7, the high point 912 of the multi-step cam 92 abuts against the bump 28, and the low point 913 of the multi-step cam 91 abuts against the bump 28, so that the running up-down lift motor 252 transmits the feeding motion of the feed dog 251 in a backward tilting state.

In contrast, in fig. 8, the low adjustment point 913 of the multi-stage cam two 92 abuts on the projection 28, the high adjustment point 912 of the multi-stage cam one 91 abuts on the projection 28, and the feed operation in the forward tilting state is transmitted to the feed dog 251 by the up-down lift motor 252 under operation.

In fig. 9 and 10, the rotating shuttle assembly 26 of the present application has a floating rotating shuttle 261, a rotating shuttle fixing base 265, an anti-slip cover plate 266, a thread stand 268, a lower thread driving motor 262 and a hook 263. The rotating shuttle fixing seat 265 is fixed and static when the sewing machine is used for sewing, the suspension rotating shuttle 261 is placed in the rotating shuttle fixing seat 265, the thread stand 268 is placed in the suspension rotating shuttle 261, the anti-slip cover plate 266 is arranged on the outer side of the thread stand 268 and is fixedly connected to the rotating shuttle fixing seat 265, the anti-slip cover plate 266 is used for abutting against the suspension rotating shuttle 261 and/or the thread stand 268, and the anti-slip cover plate 266 is used for preventing the suspension rotating shuttle 261 and/or the thread stand from slipping out of the rotating shuttle fixing seat 265.

The hook 263 is fixedly connected to the hollow shaft 267 of the bobbin thread driving motor 262, the hollow shaft 267 of the bobbin thread driving motor 262 is sleeved on the fixing rod 264 provided on the rotating shuttle fixing seat 265, the operation track of the hook 263 is concentric with the fixing rod 264, and the fixing rod 264 is concentric with the thread stand 268.

In summary, the lower thread driving motor 262 has a middle idle shaft 267 for driving the hook needle 263 to hook the upper thread of the needle 12 and form a hitch with the lower thread of the thread frame 268 of the floating rotary hook 261. A slide gap and a positioning device are arranged between the suspension rotating shuttle 261 and the rotating shuttle fixing seat 265, and a slide gap is arranged between the suspension rotating shuttle 261 and the anti-slip cover plate 266. The rotating shuttle assembly 26 cancels a mechanical transmission mechanism of the original sewing machine, removes a speed change gear and a connection transmission rod thereof, ensures that the rotating shuttle assembly 26 directly uses the bottom line driving motor 262 to be beneficial to the intelligent control of the controller 60, greatly reduces the manufacturing difficulty and the manufacturing cost of the sewing machine, and has higher practicability.

Referring to fig. 11, 12 and 13, the thread cutting assembly 27 of the present application has a lower thread driving motor 262, a hollow rotary shaft 267, a thread cutting driving source 271, a push-type cutter holder 270, a thread cutting push rod 272, an elastic member 273, a main cutter 274, a main push-type cutter link 275, a sub-cutter 276, a thread cutting holder 277, a main push-type cutter holder 278, and a sub-push-type cutter link 279. The thread trimming assembly 27 of the present application is generally: the thread cutting push rod 272 of the thread cutting assembly 27 is pushed and displaced by the thread cutting drive source 271, and the displaced thread cutting push rod 272 is rotated and pushed by the lower thread drive motor 262 of the rotary shuttle assembly 26 to perform the thread cutting operation.

When the sewing is finished, that is, when the lower thread driving motor 262 is operated to finish the sewing in the last turn, the controller 60 starts the above-mentioned thread cutting operation. Firstly, the thread trimming driving source 271 is started to push the thread trimming push rod 272, then the push block 272a arranged at the front end of the thread trimming push rod 272 reaches the notch 262c arranged on the hollow rotating shaft 267, so that the rotating hollow rotating shaft 267 drives the thread trimming push rod 272 to rotate, and finally the thread trimming push rod 272 pushes each component of the thread trimming component 27 to execute thread trimming.

The specific implementation modes are as follows: the thread cutting push rod 272 is firstly pushed by the thread cutting drive source 271, the thread cutting drive source 271 is then pushed to rotate by the bobbin thread drive motor 262, the rotating thread cutting push rod 272 generates thrust on the secondary push rod 279 and the primary push rod 275, the secondary push rod 279 and the primary push rod 275 push the primary push rod tool rest 278 and the push rod tool rest 270, the primary push rod tool rest 278 and the push rod tool rest 270 are respectively connected with the primary knife 274 and the push rod tool 276, and the primary push rod tool rest 274 and the push rod tool rest 276 are pushed to be connected downwards to complete thread cutting action when the primary push rod tool rest 278 and the push rod tool rest 270 push the secondary knife 274 and the push rod tool 276 oppositely.

The thread trimming push rod 272 has a link end 272b hinged to the main push link 275, and the sub push link 279 is hinged to a middle portion of the thread trimming push rod 272. The thread trimming push rod 272 further has a slide groove 272c at a middle position thereof, and the slide groove 272c is matched with a slide bar 262a provided on the bobbin thread driving motor 262 or the thread trimming driving source bracket 27 e. An elastic piece 273 is further arranged between the trimming driving source bracket 27e and the trimming push rod 272. After finishing the thread cutting action, the thread cutting driving source 271 is immediately reset to the initial position, and then the thread cutting push rod 272, the main knife 274 and the push sub-knife 276 also return to the initial position, thereby finishing one thread cutting action.

In the above description, the notch 262c of the hollow rotating shaft 267 is used to drive the pushing block 272a of the thread trimming pushing rod 272 to perform a rotary thread trimming operation, and the thread trimming assembly with different structures can be implemented to perform the thread trimming operation by using this method.

In fig. 14 and 15, a thread take-up assembly 80 of a feed dog assembly of a split sewing machine according to the present application includes a sub take-up reel 81, a take-up reel 82, a rotation shaft 86, a first thread gripper 84, a second thread gripper 85, and a thread take-up link 83. A take-up column 821 is fixedly arranged at the eccentric position of the take-up reel 82, the take-up column 821 is provided with a pull groove 822, the sewing upper thread is led to the take-up column 821 from the position between the first thread clamping device 84 and the second thread clamping device 85 and is sleeved on the pull groove 822, the take-up reel 82 and the take-up column perform circular operation, and the take-up column 821 carries out take-up or pay-off of the sewing upper thread under the change of the position under the circular operation. The circumferential operation of the take-up reel 82 is realized by the action of a take-up rotating shaft 86 connected with the take-up auxiliary reel 81 to transmit power, the rotation of the take-up auxiliary reel 81 comes from a sewing machine main shaft motor 41 to drive the needle rod 11 to push up and down, namely, the needle rod 11 is connected with the take-up auxiliary reel 81 through a take-up connecting rod 83, the take-up connecting rod 83 is connected to the eccentric position of the take-up auxiliary reel 81, and the take-up auxiliary reel 81 is driven to rotate by the up-and-down pushing force of the needle rod 11 in an eccentric mode.

In short, when the spindle motor 41 drives the needle bar 11 to move up and down, the thread take-up link 83 drives the thread take-up sub-disc 81 to perform a circular operation, the thread take-up sub-disc 81 transmits power to the thread take-up disc 82, and the thread take-up disc 82 finally drives the thread take-up post 821 to perform a thread take-up operation. The thread take-up assembly 80 is simple in structure, the thread take-up speed is consistent with the operation of the needle bar 11, so that the thread take-up and release of the sewing upper thread are more accurate, and the intelligent control level of the sewing machine is improved.

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 contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. The cloth feeding dog assembly of the split sewing machine is characterized in that an up-and-down lifting motor (252) and a front-and-back cloth feeding motor (253) are arranged on the cloth feeding dog assembly (25), the up-and-down lifting motor (252) indirectly acts on a cloth feeding dog connecting frame (254) and a cloth feeding dog (251) which are arranged on the cloth feeding dog assembly (25), the up-and-down lifting motor (252) indirectly acts on the bottom (2551) of a supporting frame (255) of the cloth feeding dog assembly (25), and the supporting frame (255) is movably matched with the cloth feeding dog connecting frame (254).

2. The feed dog assembly of a split sewing machine as claimed in claim 1, wherein the first feed dog cam (256) and the second feed dog cam (257) are mounted on the output shafts at both ends of the up-down lift motor (252), and the first feed dog cam (256) and the second feed dog cam (257) respectively act on the two protrusions (28) at the bottom of the support frame (255) of the feed dog assembly (25).

3. The feed dog assembly of a split sewing machine as claimed in claim 1, wherein said up-down lift motor (252) is fixed to a base plate (211) provided in the feed dog assembly (25).

4. The feed dog assembly of a split sewing machine as claimed in claim 1, wherein the front and rear feed motors (253) drive the turntable (25e) to drive the connecting rod (25f), the connecting rod (25f) is movably connected to an eccentric position of the turntable (25e), and the connecting rod (25f) is movably connected to the feed dog connecting bracket (254).

5. The feed dog assembly of a split sewing machine according to claim 1, wherein the feed dog attachment bracket (254) has a copper bush swing lever (25b) and a drive end swing lever (25a) at both ends thereof respectively provided on fixed copper bushes (259) provided at both ends of the support bracket (255), the feed dog (251) is attached above the feed dog attachment bracket (254), and the front and rear feed motors (253) are fixed to an upper portion of the support bracket (255) provided in the sewing machine.

6. The feed dog assembly of a split sewing machine according to claim 2, wherein the support frame (255) is provided with support bars (25c) at the front and rear sides thereof, the support bars (25c) are fixed to the base plate (211), the up-down lift motor (252) is provided with a bracket (250) at the front and rear positions thereof, and the bracket (250) is provided with a groove (25d) at the top thereof.

7. The feed dog assembly of a split sewing machine according to claim 1 or 2, wherein the output shafts at both ends of the up-down lifting motor (252) are provided with a multi-stage cam one (91) and a multi-stage cam two (92), and the multi-stage cam one (91) and the multi-stage cam two (92) are provided with a plurality of adjusting high points (912) and a plurality of adjusting low points (913).

8. The feed dog assembly of a split sewing machine according to claim 7, wherein the high adjusting point (912) and the low adjusting point (913) of the first multi-stage cam (91) and the second multi-stage cam (92) are installed at two ends of the up-down lifting motor (252) in a staggered manner.

9. The feed dog assembly of a split sewing machine as claimed in claim 7, wherein the high adjustment points (912) of the first multi-stage cam (91) and the second multi-stage cam (92) are adjacent to each other to form a low adjustment point (913).