CN114575052B - Feed dog subassembly of disconnect-type sewing machine - Google Patents
Feed dog subassembly of disconnect-type sewing machine Download PDFInfo
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- CN114575052B CN114575052B CN202011380550.2A CN202011380550A CN114575052B CN 114575052 B CN114575052 B CN 114575052B CN 202011380550 A CN202011380550 A CN 202011380550A CN 114575052 B CN114575052 B CN 114575052B
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- feed dog
- motor
- feed
- cloth feeding
- cam
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The application provides a feed dog assembly of a split type sewing machine, and particularly relates to the technical field of sewing machine manufacturing. The upper and lower lifting motor and the front and back cloth feeding motor of the cloth feeding assembly apply a non-lateral swinging source to the cloth feeding, the upper and lower lifting motor and the front and back cloth feeding motor indirectly act on the cloth feeding to execute cloth feeding action, the front and back cloth feeding motor drives the turntable to drive the connecting rod, the connecting rod is movably connected to the eccentric position of the turntable, and the connecting rod is movably connected with the cloth feeding connecting frame. The upper and lower lifting motor and the front and rear cloth feeding motor are utilized to transfer the swing source to the cloth feeding tooth component, the cloth feeding tooth component can be additionally arranged on the bottom line mechanism and can be manufactured into a modularized matching mode to be used on various sewing machines, so that the mechanical structure of the sewing machine is simplified, the sewing transmission efficiency is higher, and the high popularization value is realized.
Description
Technical Field
The application provides a feed dog assembly of a split type sewing machine, and particularly relates to the technical field of sewing machine manufacturing.
Background
The sewing machine is a sewing device for sewing clothing, bags, shoes, hats, quilts, etc. 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 bar crankshaft which are fixedly connected with the upper main shaft to simultaneously operate. In the bottom thread sewing transmission mechanism, the eccentric rotating wheel drives the cloth feeding connecting rod and the lifting tooth connecting rod to operate simultaneously, the cloth feeding connecting rod drives the cloth feeding shaft to operate through the swinging seat assembly, and the lifting tooth connecting rod drives the lifting tooth shaft to swing through the lifting tooth crank; the cloth feeding shaft and the lifting tooth shaft are arranged on two sides of the sewing machine base, and are connected with a cloth feeding tooth frame in the middle through a crank. The cloth feeding shaft and the cloth lifting shaft transmit swinging sources to the cloth feeding rack from two sides of the cloth feeding rack, the swinging drive of the cloth feeding shaft is fixedly connected with the rack swinging on the cloth feeding shaft so as to provide the cloth feeding rack with swinging in the approximately horizontal direction, the swinging drive of the cloth lifting shaft is fixedly connected with the fork swinging on the cloth lifting shaft so as to provide the cloth feeding rack with swinging in the approximately vertical direction, and the cloth feeding rack is combined with the swinging in the vertical up-down direction from the horizontal front-back direction to form a cloth feeding rack running track. At the same time, the bevel gear is connected to a vertical shaft in the vertical direction, which transmits torque to a lower shaft, which is connected and operates the rotating shuttle by changing the gear size to increase the rotational speed by a factor of 2.
In summary, in the sewing process of the sewing machine, the spindle motor drives the eccentric rotating wheel, the bevel gear and the needle bar crankshaft on the spindle to realize the cooperative cloth feeding of the cloth feeding tooth, the presser foot and the needle, and the sewing process of rotating shuttle operation is matched. The traditional upper and lower linkage transmission mechanism of the sewing machine is complex, on one hand, the noise of the sewing machine is high, and on the other hand, the requirement on the manufacturing standard of mechanical transmission parts of the sewing machine is higher, and particularly, the rotating shuttle requirement for playing a key role in sewing the lower thread outgoing line is higher. Since the sewing machine is provided with the traditional mechanical transmission structure, a feasible scheme is needed to improve the transmission efficiency of the sewing machine so as to overcome the technical defects, and simultaneously, the manufacturing difficulty of the sewing machine is reduced, the manufacturing cost of the sewing machine is lowered, and the intelligent control level of the sewing machine is improved.
Disclosure of Invention
The application provides a feed dog assembly of a separated sewing machine, which has high transmission efficiency and low manufacturing difficulty and is provided with an up-down lifting motor and a front-back feed motor which are arranged on the feed dog assembly to apply a non-lateral swinging source to the feed dog so that the up-down lifting motor and the front-back feed motor indirectly act on the feed dog to execute a feed action.
Preferably, the first lifting tooth cam and the second lifting tooth cam are respectively arranged on the output shafts at the two ends of the up-down lifting motor, and the first lifting tooth cam and the second lifting tooth cam respectively act on the two protruding blocks of the feed dog assembly with the bottom of the support frame.
Preferably, the up-down lifting motor is fixed on a bottom plate of the sewing machine.
Preferably, the front cloth feeding motor and the rear cloth feeding motor drive the turntable to drive the connecting rod, the connecting rod is movably connected to the eccentric position of the turntable, and the connecting rod is movably connected to the cloth feeding tooth connecting frame.
Preferably, copper bush swinging rods and driving end swinging rods arranged at two ends of the feed dog connecting frame are respectively arranged on fixed copper bushes arranged at two ends of the supporting frame, the upper part of the feed dog connecting frame is connected with feed dogs, and the front and rear feed motors are fixed on the upper part of the supporting frame of the sewing machine.
Preferably, the front side and the rear side of the support frame are respectively provided with a support rod, the front and the rear positions of the upper lifting motor and the lower lifting motor of the support rod fixed on the bottom plate are respectively provided with a support, and the tops of the supports are provided with grooves.
Preferably, the output shafts at two ends of the lifting motor are provided with a multi-stage cam I and a multi-stage cam II, and 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 adjusting high points and the adjusting low points of the multi-stage cam I and the multi-stage cam II are arranged at two ends of the upper lifting motor and the lower lifting motor in a staggered mode.
Preferably, the adjusting high points of the multi-stage cam I and the multi-stage cam II are adjacent to each other.
The application discloses a feed dog assembly of a separated sewing machine, which cancels a traditional up-down linkage mechanical transmission structure, utilizes an up-down lifting motor and a front-back feed motor to transmit a swinging source to the feed dog assembly, realizes oilless work of the feed dog of the sewing machine, skillfully realizes separation of a thread feeding mechanism and a bottom thread mechanism on mechanical transmission, and can be additionally arranged on the bottom thread mechanism to be manufactured into a modularized matching for use on various sewing machines. The separated type sewing machine feed dog assembly improves the transmission efficiency to the greatest extent, further realizes the intelligent control of the sewing feed dog assembly, simplifies the mechanical structure of the sewing machine, has higher sewing transmission efficiency and 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 construction view of a lower thread mechanism of a feed dog assembly of a separate type sewing machine according to the present application;
FIG. 3 is a schematic view of a feed dog assembly of a split sewing machine according to the present application;
FIG. 4 is a view showing a feed dog construction of a feed dog assembly of a separate type sewing machine according to the present application;
FIG. 5 is a schematic view of a feed dog assembly of a split sewing machine according to 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 schematic view showing the inclined feeding of a feed dog of a separate sewing machine according to the present application;
FIG. 8 is a schematic view showing the oblique feed of a feed dog of a separate type sewing machine according to the present application;
FIG. 9 is a schematic view of a rotating shuttle assembly of a feed dog assembly of a split sewing machine according to the present application;
FIG. 10 is a construction view of a rotating shuttle 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 cutting assembly of a feed dog assembly of a split sewing machine according to the present application;
FIG. 12 is a view showing the internal construction of a thread cutting assembly of a feed dog assembly of a separate type sewing machine according to the present application;
FIG. 13 is a schematic view of a thread cutting push rod of a feed dog assembly of a split sewing machine according to the present application;
FIG. 14 is a schematic view of a take-up assembly of a feed dog assembly of a split sewing machine according to the present application;
fig. 15 is a schematic view of a take-up spool of a feed dog assembly of a split sewing machine according to the present application.
Reference numerals: the upper thread mechanism 10, the needle bar 11, the needle 12, the lower thread mechanism 20, the fixed seat 21, the bottom plate 211, the feed dog assembly 25, the feed dog 251, the up-down lifting motor 252, the front-back feed motor 253, the feed dog connecting frame 254, the supporting frame 255, the first lifting cam 256, the second lifting cam 257, the needle plate 258, the fixed copper sleeve 259, the driving end swinging rod 25a, the copper sleeve swinging rod 25b, the turntable 25e, the connecting rod 25f, the bracket 250, the supporting rod 25c, the groove 25d, the rotating shuttle assembly 26, the suspension rotating shuttle 261, the lower thread driving motor 262, the notch 262a, the hooking pin 263, the fixed rod 264, the rotating shuttle fixed seat 265, the anti-slip cover plate 266, the hollow rotating shaft 267, the thread frame 268, the thread cutting assembly 27, the thread cutting drive source 271, the thread cutting push rod 272, the push block 272a, the link end 272b, the slide groove 272c, the thread cutting drive source holder 27e, the elastic member 273, the main blade 274, the main push blade link 275, the push sub blade 276, the thread cutting holder 277, the main push blade holder 278, the sub push blade link 279, the push blade holder 270, the bump 28, the platen 30, the head 40, the spindle motor 41, the platen 30, the controller 60, the control panel 61, the base 70, the thread take-up member 80, the thread take-up sub-disc 81, the thread take-up reel 82, the thread take-up post 821, the thread take-up groove 822, the thread take-up link 83, the thread clamp one 84, the thread take-up shaft 86, the multi-stage cam one 91, the multi-stage cam two 92, the high adjustment point 912, the low adjustment point 913.
Detailed Description
The preferred embodiments of the present application will now be described in detail with reference to the accompanying drawings so that the advantages and features of the present application will be more readily understood by those skilled in the art, and thus the scope of the present application is more clearly defined by the following detailed description, which is given by way of illustration of the present application and not limitation.
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 structure including a head 40, a platen 30 and a base 70. The machine head 40 is provided with a wire feeding mechanism 10, a spindle motor 41 and a controller 60, wherein a control panel 61 provided on the controller 60 is arranged on the front surface of the machine head 40; a lower thread mechanism 20 is mounted under the platen 30, and the upper thread mechanism 10 and the lower thread mechanism 20 are two sewing mechanisms independently provided 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 independently operate, and the plurality of driving sources commonly 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 top to bottom, and the thread feeding mechanism 10 and the thread backing mechanism 20 are provided with respective running power devices. The application relates to a feed dog assembly of a split sewing machine, which adopts a mechanical transmission split structure, wherein a thread feeding mechanism 10 basically maintains the structure of the original sewing machine, a bottom thread mechanism 20 is greatly modified, and particularly, the feed dog assembly 25 and a rotating shuttle assembly 26 are overturned. The sewing machine can realize the sewing operation of the bottom thread by adopting a plurality of miniature driving sources, and the miniaturized modularized manufacturing of the bottom thread mechanism 20 is realized, so that the sewing machine is suitable for the installation and the use of various sewing machines with different styles, the sewing machine has a simplified mechanical transmission structure, and the mechanical transmission structure does not need to provide a lubrication system in operation.
Fig. 2 and 3 are schematic views showing a bottom thread mechanism 20 of a feed dog assembly of a separate type sewing machine according to the present application. The bottom thread mechanism 20 has a feed dog assembly 25, a rotating shuttle assembly 26 and a thread cutting assembly 27, the bottom thread mechanism 20 is arranged in a fixed seat 21, and the fixed seat 21 is fixedly arranged below a platen 30. The lower thread mechanism 20 is mounted on the side of the platen 30 adjacent to the upper thread mechanism 10.
In fig. 2, 3, 4 and 5, the feed dog assembly 25 of the present application has a vertical lift motor 252 and a front-rear feed motor 253, and the feed action of the feed dog is realized by means of the vertical lift motor 252 and the front-rear feed motor 253 simultaneously and cooperatively outputting a swinging source. The two swing driving sources implement non-lateral transmission swing sources 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 a remarkable characteristic of the swing sources of the application, which is different from the prior art. The two swing driving sources indirectly act on the feed dog 251 to realize the feed action, and the concrete feed dog assembly 25 is provided with an up-down lifting motor 252, a front-back feed motor 253, a support frame 255, a feed dog connecting frame 254, a support frame 250, a driving feed lifting cam I256, a feed lifting cam II 257 and the like. The output shafts at two ends of the up-down lifting motor 252 are provided with a first driving lifting tooth cam 256 and a second lifting tooth cam 257.
The up-down lifting motor 252 is fixed on the bottom plate 211 of the fixing base 21, and the first driving lifting cam 256 and the second lifting cam 257 are installed at two ends of the up-down lifting motor 252 and are disposed at two sides of the fixing base 21. The first lifting cam 256 and the second lifting cam 257 respectively act on two protruding blocks 28 on two sides of the bottom of the supporting frame 255. The support rods 25c are respectively disposed on the front and rear sides of the support frame 255, a bracket 250 is fixed on the bottom plate 211, the bracket 250 is disposed at the front and rear of the up-down lifting motor 252, a groove 25d is disposed at the top of the bracket 250 for supporting the support rods 25c, and the groove 25d supports the entire support frame 255. The up-down lifting motor 252 controlled by the controller 60 performs a rotation action to drive the first lifting tooth cam 256 and the second lifting tooth cam 257 to rotate, and the first lifting tooth cam 256 and the second lifting tooth cam 257 have the structural characteristics of unequal diameters, so that the support frame 255 performs an up-down swinging action meeting the requirement of the feed dog 251 and is limited in the groove 25d, and the up-down swinging of the feed dog 251 is driven.
The output shaft of the front and rear cloth feeding motor 253 is provided with a back and forth swinging device for realizing the front and rear swinging motion of the cloth feeding teeth 251. The back and forth swinging device of the embodiment specifically comprises: the upper portion both ends of support frame 255 are provided with fixed copper sheathing 259, and front and back feed motor 253 sets up the side at support frame 255. The upper part of the feed dog connecting frame 254 is fixedly connected with a feed dog 251, and copper bush swinging rods 25b and driving end swinging rods 25a which are arranged at two ends of the feed dog connecting frame 254 are respectively arranged on fixed copper bushes 259 which are arranged at two ends of 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 table 25e, the connecting rod 25f is movably connected with an eccentric position of the rotary table 25e, and the rotary table 25e is fixed on an output shaft of the front and rear feed motor 253. The front and back cloth feeding motor 253 controlled by the controller 60 drives the turntable 25e and then drives the connecting rod 25f, and the movable connecting rod 25f swings to enable the cloth feeding tooth connecting frame 254 to make front and back swinging motions meeting the feeding requirements of the cloth feeding tooth 251, so that the front and back swinging of the cloth feeding tooth 251 is realized.
Under the control of the controller 60, the forward and backward swinging motion of the forward and backward cloth feeding motor 253 and the up and down swinging motion of the up and down lifting motor 252 are transmitted to the cloth feeding teeth 251 through the cloth feeding teeth connecting frame 254, and are limited in the groove 25d, so that the cloth feeding teeth 251 in a cloth feeding motion state are formed, and the feeding motion of the cloth feeding teeth 251 of the flat knitting machine is realized.
The fixed seat 21 further has a needle plate 258 integrally connected with the fixed seat 21, and the feed dog 251 operates in the needle plate 258.
The up-down swing source transferred from the up-down lifting motor 252 controlled by the controller 60 and the up-down swing source transferred from the up-down cloth feeding motor 253 are indirectly acted on the cloth feeding teeth 251 together, so that the cloth feeding action of the cloth feeding teeth 251 of the sewing machine is realized. 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 distance, so that the traditional needle distance adjusting method of the original sewing machine is overcome, meanwhile, the separation of the mechanical transmission mechanism of the sewing machine is realized, the technical defects that the traditional sewing machine is complex in mechanical transmission mechanism and the lubricating system is required to be paved for operation are overcome, the manufacturing difficulty of the sewing machine is greatly reduced, and the sewing machine has epoch-making technical value.
Fig. 6, 7 and 8 show a schematic view of a multi-stage cam one 91 and a multi-stage cam two 92 of the feed dog assembly 25 of the present application. The first and second multi-stage cams 91 and 92 have the same shape and the same size, except that the first and second multi-stage cams 91 and 92 are mounted to both ends of the up-down lift motor 252 at different positions and angles. The first and second multi-stage cams 91 and 92 each have a plurality of adjustment high points 912 defining the highest position of the feed dog 251 and a plurality of adjustment low points 913 defining 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 shafts mounted to both ends of the up-down elevating motor 252, the adjustment high points 912 and the adjustment low points 913 of the multi-stage cam one 91 and the multi-stage cam two 92 are mounted in a staggered manner at both ends of the up-down elevating motor 252, that is, the adjustment high points 912 are not mounted corresponding to the adjustment high points 912, and the adjustment high points 912 are mounted corresponding to the adjustment low points 913.
In fig. 7, the adjusting high point 912 of the multi-stage cam two 92 abuts against the cam 28, and the adjusting low point 913 of the multi-stage cam one 91 abuts against the cam 28, and the up-down lift motor 252 is operated to transfer the feeding motion of the feed dog 251 in the backward tilting state.
In contrast, in fig. 8, the adjusting low point 913 of the second multi-stage cam 92 abuts against the cam 28, and the adjusting high point 912 of the first multi-stage cam 91 abuts against the cam 28, and the feeding motion of the feed dog 251 is transmitted to the up-down lift motor 252 in the running state.
In fig. 9 and 10, the rotating shuttle assembly 26 of the present application has a suspending rotating shuttle 261, a rotating shuttle holder 265, an anti-slip cover 266, a thread rack 268, a bobbin thread driving motor 262, and a hooking needle 263. When the sewing machine is used for sewing, the rotating shuttle fixing seat 265 is fixed and static, the suspended rotating shuttle 261 is placed inside the rotating shuttle fixing seat 265, the thread stand 268 is placed inside the suspended rotating shuttle 261, the anti-slip cover plate 266 is arranged outside the thread stand 268 and fixedly connected to the rotating shuttle fixing seat 265, the anti-slip cover plate 266 is used for abutting against the suspended rotating shuttle 261 and/or the thread stand 268, and the anti-slip cover plate 266 is used for preventing the suspended rotating shuttle 261 and/or the thread stand from slipping out of the rotating shuttle fixing seat 265.
The hooking pin 263 is fixedly connected with a hollow shaft 267 of the bobbin thread driving motor 262, the hollow shaft 267 of the bobbin thread driving motor 262 is sleeved on a fixed rod 264 provided with a rotating shuttle fixing seat 265, the moving track of the hooking pin 263 is concentric with the fixed rod 264, and the fixed rod 264 is concentric with a thread stand 268.
In summary, the hollow shaft 267 of the bottom thread driving motor 262 drives the hooking needle 263 to hook the upper thread on the needle 12 and the lower thread on the bobbin 268 in the suspension rotating shuttle 261 to form a loop. A sliding line gap and a positioning device are arranged between the suspension rotating shuttle 261 and the rotating shuttle fixing seat 265, and a sliding line gap is arranged between the suspension rotating shuttle 261 and the anti-sliding cover plate 266. The rotating shuttle assembly 26 of the application eliminates the mechanical transmission mechanism of the original sewing machine, removes a speed change gear and a connecting transmission rod thereof, so that the rotating shuttle assembly 26 directly uses the bottom line driving motor 262 to facilitate 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 wire cutting assembly 27 of the present application has a wire driving motor 262, a hollow shaft 267, a wire cutting driving source 271, a cutter holder 270, a wire cutting push rod 272, an elastic member 273, a main cutter 274, a main cutter link 275, a push sub cutter 276, a wire cutting holder 277, a main cutter holder 278 and a sub cutter link 279. The general scheme of the wire cutting assembly 27 of the present application is: 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 bobbin thread driving motor 262 of the rotating shuttle assembly 26 to perform thread cutting operation.
When the sewing is finished, that is, when the bobbin thread driving motor 262 is operated to finish the sewing in the last turn, the controller 60 starts the thread cutting operation as described above. Firstly, the thread cutting driving source 271 is started to push the thread cutting push rod 272, then the push block 272a at the front end of the thread cutting push rod 272 reaches the notch 262c of the hollow rotating shaft 267, so that the hollow rotating shaft 267 in operation drives the thread cutting push rod 272 to rotate, and finally the thread cutting push rod 272 pushes each component of the thread cutting component 27 to execute thread cutting action.
Specific embodiments include: the above-mentioned thread cutting push rod 272 is pushed by the thread cutting driving source 271 first, the thread cutting driving source 271 is then pushed by the bottom thread driving motor 262 to rotate, the rotating thread cutting push rod 272 generates pushing force to 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 278 and the push rod 270, the primary push rod 278 and the push rod 270 are respectively connected with the primary knife 274 and the pushing secondary knife 276, and the primary push rod 278 and the push rod 270 push the secondary knife 276 in opposite directions to connect the primary knife 274 and the pushing secondary knife 276 to complete the thread cutting action.
The link end 272b of the wire cutting push rod 272 is hinged to the main push rod 275, and the sub push rod 279 is hinged to the middle portion of the wire cutting push rod 272. The middle portion of the wire cutting push rod 272 also has a sliding groove 272c, and the sliding groove 272c is matched with a sliding rod 262a arranged on the bottom wire driving motor 262 or the wire cutting driving source bracket 27 e. An elastic member 273 is provided between the wire cutting drive source holder 27e and the wire cutting push rod 272. After the thread cutting operation is completed, the thread cutting drive source 271 is immediately reset to the initial position, and accordingly, the thread cutting push rod 272, the main blade 274 and the pushing secondary blade 276 are returned to the initial position, thereby completing the thread cutting operation once.
The above description describes a rotary thread cutting operation performed by using the notch 262c of the hollow rotating shaft 267 to drive the push block 272a of the thread cutting push rod 272, and the thread cutting assembly with different structures can be implemented to perform the thread cutting operation by using the method, which is not limited to the above thread cutting assembly structure.
In fig. 14 and 15, a take-up assembly 80 of a feed dog assembly of a split sewing machine of the present application has a take-up sub-reel 81, a take-up reel 82, a rotating shaft 86, a first thread clamp 84, a second thread clamp 85, and a take-up link 83. The take-up reel 82 is fixed at an eccentric position, the take-up reel 821 has a wire-drawing slot 822, the sewing thread is led to the take-up reel 821 from the first 84 and second 85 thread clamps, the sewing thread is sleeved on the wire-drawing slot 822, the take-up reel 82 and the take-up reel together perform a circular operation, and the change of the take-up reel 821 at the position under the circular operation brings the sewing thread to be taken up or paid out. The circumferential operation of the take-up reel 82 is that the take-up rotary shaft 86 connected with the take-up auxiliary disc 81 is used for transmitting power, the rotation of the take-up auxiliary disc 81 is that the main shaft motor 41 of the sewing machine drives the needle bar 11 to push up and down, namely, the take-up connecting rod 83 is connected between the needle bar 11 and the take-up auxiliary disc 81, the take-up connecting rod 83 is connected to the eccentric position of the take-up auxiliary disc 81, and the needle bar 11 pushes up and down to drive the take-up auxiliary disc 81 to rotate in an eccentric mode.
In short, the spindle motor 41 drives the needle bar 11 to move up and down, and the thread take-up connecting rod 83 drives the thread take-up auxiliary disc 81 to perform circumferential operation, the thread take-up auxiliary 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 thread take-up. The thread take-up assembly 80 is simple in structure, the thread take-up speed is consistent with the running of the needle bar 11, the thread take-up and pay-off of the upper sewing thread are more accurate, and the intelligent control level of the sewing machine is improved.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (4)
1. The feed dog assembly of the separated sewing machine is characterized in that the feed dog assembly (25) is provided with an up-down lifting motor (252) and a front-back feed motor (253), the up-down lifting motor (252) and the front-back feed motor (253) apply a non-lateral swinging source to the feed dog (251), and the up-down lifting motor (252) and the front-back feed motor (253) indirectly act on the feed dog (251) to execute a feed action;
The feed dog assembly (25) is further provided with a first feed dog cam (256), a second feed dog cam (257), a support frame (255), a feed dog connecting frame (254) and feed dogs (251), the first feed dog cam (256) and the second feed dog cam (257) are arranged on output shafts at two ends of the upper and lower lifting motors (252), the first feed dog cam (256) and the second feed dog cam (257) respectively act on two convex blocks (28) at the bottom of the support frame (255), and the first feed dog cam (256) and the second feed dog cam (257) are driven to have the structural characteristics of unequal diameters; the front side and the rear side of the support frame (255) are respectively provided with a support rod (25 c), the front and the rear positions of the upper lifting motor (252) are respectively provided with a support frame (250), the top of the support frame (250) is provided with a groove (25 d), the groove (25 d) is used for supporting the support rod (25 c), the groove (25 d) supports the whole support frame, the upper part of the feed dog connecting frame (254) is connected with the feed dog (251), copper bush swinging rods (25 b) and driving end swinging rods (25 a) which are arranged at two ends of the feed dog connecting frame (254) are respectively arranged on fixed copper bushes (259) which are arranged at two ends of the support frame (255), and the front and the rear feed dog motor (253) is fixed at the upper part of the support frame (255); the up-down lifting motor (252) is fixed on a bottom plate (211) of the fixed seat (21), and the up-down lifting motor (252) controlled by the controller (60) performs a rotation action;
the front cloth feeding motor (253) drives the rotary table (25 e) and then drives the connecting rod (25 f), the connecting rod (25 f) is movably connected to the eccentric position of the rotary table (25 e), and the connecting rod (25 f) is movably connected to the cloth feeding tooth connecting frame (254).
2. The feed dog assembly of the separated sewing machine is characterized in that the feed dog assembly (25) is provided with an up-down lifting motor (252) and a front-back feed motor (253), the up-down lifting motor (252) and the front-back feed motor (253) apply a non-lateral swinging source to the feed dog (251), and the up-down lifting motor (252) and the front-back feed motor (253) indirectly act on the feed dog (251) to execute a feed action;
The feed dog assembly (25) is further provided with a multi-stage cam I (91), a multi-stage cam II (92), a supporting frame (255), a feed dog connecting frame (254) and feed dogs (251), the multi-stage cam I (91) and the multi-stage cam II (92) are arranged on output shafts at two ends of an upper lifting motor (252), the multi-stage cam I (91) and the multi-stage cam II (92) are provided with a plurality of adjusting high points (912) and a plurality of adjusting low points (913), the multi-stage cam I (91) and the multi-stage cam II (92) respectively act on two convex blocks (28) at the bottom of the supporting frame (255), the front side and the back side of the supporting frame (255) are respectively provided with a supporting rod (25 c), the front position and the back position of the upper lifting motor (252) are respectively provided with a bracket (250), grooves (25 d) arranged at the top of the bracket (250) are used for supporting the supporting rod (25 c), the grooves (25 d) hold the whole supporting frame, the feed dogs (251) are connected above the feed dog connecting frame (254), the feed dog connecting frame (254) is provided with two copper sleeves (25 a) with two ends of the copper sleeves (25 a) which are respectively provided with swinging driving ends, the front cloth feeding motor (253) and the rear cloth feeding motor are fixed at the upper part of the supporting frame (255); the up-down lifting motor (252) is fixed on a bottom plate (211) of the fixed seat (21), and the up-down lifting motor (252) controlled by the controller (60) performs a rotation action;
the front cloth feeding motor (253) drives the rotary table (25 e) and then drives the connecting rod (25 f), the connecting rod (25 f) is movably connected to the eccentric position of the rotary table (25 e), and the connecting rod (25 f) is movably connected to the cloth feeding tooth connecting frame (254).
3. The feed dog assembly of a split sewing machine according to claim 2, wherein the adjustment high points (912) and the adjustment low points (913) of the multi-stage cam one (91) and the multi-stage cam two (92) are installed at both ends of the up-down lift motor (252) in a staggered manner.
4. The feed dog assembly of a split sewing machine of claim 2, wherein the adjustment high points (912) of the multi-stage cam one (91) and the multi-stage cam two (92) are adjacent to the adjustment low points (913) both before and after.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011380550.2A CN114575052B (en) | 2020-11-30 | 2020-11-30 | Feed dog subassembly of disconnect-type sewing machine |
| PCT/CN2021/132702 WO2022111510A1 (en) | 2020-11-30 | 2021-11-24 | Feed dog assembly of separate-type sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011380550.2A CN114575052B (en) | 2020-11-30 | 2020-11-30 | Feed dog subassembly of disconnect-type sewing machine |
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| CH677804A5 (en) * | 1988-11-30 | 1991-06-28 | Mefina Sa | |
| JP2003038884A (en) * | 2001-08-03 | 2003-02-12 | Juki Corp | Lock sewing machine |
| JP2004223013A (en) * | 2003-01-23 | 2004-08-12 | Juki Corp | Sewing machine lower feed mechanism |
| CN2646174Y (en) * | 2003-08-13 | 2004-10-06 | 中国标准缝纫机公司上海惠工缝纫机三厂 | Lower feeding mechanism of high speed parallel sewing machine |
| CN102899813B (en) * | 2011-07-25 | 2014-09-03 | 兄弟工业株式会社 | Sewing machine and control method of sewing machine |
| CN105113136B (en) * | 2015-09-30 | 2018-03-06 | 杰克缝纫机股份有限公司 | Sewing machine feeding mechanism and sewing machine |
| CN105155141B (en) * | 2015-09-30 | 2018-03-02 | 杰克缝纫机股份有限公司 | Dual-motors Driving feed mechanism and sewing machine |
| CN205046312U (en) * | 2015-09-30 | 2016-02-24 | 杰克缝纫机股份有限公司 | Two motor drive feeding mechanism and sewing machine |
| JP3202791U (en) * | 2015-10-27 | 2016-02-25 | 星鋭縫▲じん▼機股▲ふん▼有限公司 | Sewing machine direct drive cloth feed mechanism |
| CN205741515U (en) * | 2016-05-10 | 2016-11-30 | 上海富山精密机械科技有限公司 | The needle gage of a kind of sewing machine directly drives controlling organization |
| CN106948101B (en) * | 2017-03-29 | 2020-04-07 | 杰克缝纫机股份有限公司 | Feeding mechanism and sewing machine |
| CN108396468B (en) * | 2018-04-24 | 2023-08-15 | 浙江美机缝纫机有限公司 | Dual-motor driving feeding device of sewing machine |
| CN214422858U (en) * | 2020-11-30 | 2021-10-19 | 琦星智能科技股份有限公司 | Sewing machine capable of sewing by cooperatively rotating upper thread mechanism and lower thread mechanism |
| CN214422841U (en) * | 2020-11-30 | 2021-10-19 | 琦星智能科技股份有限公司 | Disconnect-type flush joint machine |
| CN214193680U (en) * | 2020-11-30 | 2021-09-14 | 琦星智能科技股份有限公司 | Independent operation bottom line mechanism of separated sewing machine |
| CN214193701U (en) * | 2020-11-30 | 2021-09-14 | 琦星智能科技股份有限公司 | Independent operation bottom line mechanism of separated sewing machine |
| CN213804264U (en) * | 2020-11-30 | 2021-07-27 | 琦星智能科技股份有限公司 | Feed dog subassembly of disconnect-type sewing machine |
| CN214193679U (en) * | 2020-11-30 | 2021-09-14 | 琦星智能科技股份有限公司 | Feed dog assembly of sewing machine |
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