CN115182104A - Feeding thread hooking mechanism capable of being flexibly adjusted and sewing machine - Google Patents

Abstract

The invention provides a feeding thread hooking mechanism capable of being flexibly adjusted and a sewing machine, wherein the feeding thread hooking mechanism capable of being flexibly adjusted comprises a tooth frame, a cloth feeding tooth and a feeding thread hooking module, the feeding thread hooking module comprises a feeding thread hooking driving source, a rotatable rotating shuttle, a tooth lifting connecting part arranged at one end of the tooth frame and a tooth lifting thread hooking transmission mechanism, the feeding thread hooking driving source is connected with the rotating shuttle and the tooth lifting connecting part of the tooth frame through the tooth lifting thread hooking transmission mechanism, and the feeding thread hooking driving source is independent of a driving source used for driving a machine needle to run in the sewing machine. This application integrates sewing machine's lifting teeth function and collude line function into an independent functional module, uses independent pay-off collude line driving source drive collude line and lifting teeth, has realized that the relative chronogenesis that is arranged in driving eedle moving driving source among pay-off collude line driving source and the sewing machine is adjustable to can adjust the cooperation chronogenesis of rotating shuttle and eedle, and the up-and-down reciprocating motion of feed dog and the cooperation chronogenesis of eedle, greatly promote sewing machine's sewing adaptability.

Description

Feeding thread hooking mechanism capable of being flexibly adjusted and sewing machine

Technical Field

The invention relates to a flexibly adjustable feeding and hooking mechanism.

The invention also relates to a sewing machine comprising the flexibly adjustable feeding and thread hooking mechanism.

Background

At present, a sewing machine in the prior art is structured as shown in fig. 1, and mainly includes a main motor 100, a main shaft 200 driven by the main motor 100 to rotate, a cloth-pricking and thread-picking mechanism 300, a feeding mechanism 400, and a thread-hooking mechanism 500, wherein the power of the cloth-pricking and thread-picking mechanism 300, the feeding mechanism 400, and the thread-hooking mechanism 500 is derived from the main shaft 200. When the sewing machine is operated, the main motor 100 drives the main shaft 200 to rotate in the circumferential direction, the main shaft 200 transmits power to the needle 301 in the cloth-stabbing and thread-taking-up mechanism 300, the feed dog 401 in the feeding mechanism 400, and the rotary shuttle 501 in the thread-hooking mechanism 500 through the transmission mechanisms, respectively, so that the needle 301 reciprocates up and down to perform the cloth-stabbing operation, the feed dog 401 reciprocates up and down and back and forth to perform the cloth-feeding operation, and the rotary shuttle 501 rotates in the circumferential direction to perform the thread-hooking operation. Therefore, the existing sewing machine uses the main motor 100 as the main power source, and transmits the power to the end actuating components of the needle 301, the feed dog 401 and the rotating shuttle 501 respectively through a relatively complicated transmission structure, however, the sewing machine with this structure has the following defects: 1. the matching time sequence of the needle and the rotating shuttle is not adjustable; 2. the motion track form of the feed dog is not adjustable; 3. the requirement on the machining precision of parts is high. Therefore, the existing sewing machine is difficult to adapt to more and more complex sewing working conditions.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention provides a flexibly adjustable feeding hook mechanism, which can improve sewing adaptability.

In order to achieve the purpose, the invention provides a flexibly adjustable feeding and thread hooking mechanism which comprises a tooth frame, a cloth feeding tooth arranged on the tooth frame and a feeding and thread hooking module, wherein the feeding and thread hooking module comprises a feeding and thread hooking driving source, a rotatable rotating shuttle, a tooth lifting connecting part arranged at one end of the tooth frame and a tooth lifting and thread hooking transmission mechanism, the feeding and thread hooking driving source is connected with the rotating shuttle and the tooth lifting connecting part of the tooth frame through the tooth lifting and thread hooking transmission mechanism, and the feeding and thread hooking driving source is independent of a driving source used for driving a machine needle to run in a sewing machine.

Further, pay-off colludes line mechanism still includes and is independent of the cloth feeding module of pay-off colluding line module, the cloth feeding module includes the work feed driving source, sets up at the work feed connecting portion and the first work feed drive mechanism of the dental articulator other end, the work feed driving source links to each other with the work feed connecting portion of dental articulator through first work feed drive mechanism, pay-off colludes line driving source and work feed driving source mutual independence.

Furthermore, the feeding thread hooking module further comprises a cloth feeding connecting part arranged at the other end of the dental articulator and a second cloth feeding transmission mechanism, and one transmission part in the feed lifting thread hooking transmission mechanism is connected with the cloth feeding connecting part of the dental articulator through the second cloth feeding transmission mechanism.

Further, the feed lifting tooth thread hooking transmission mechanism comprises a feed lifting tooth shaft and a lower shaft which are rotatably supported in the sewing machine shell, a shaft transmission unit connected between the feed lifting tooth shaft and the lower shaft, and a feed lifting tooth transmission unit connected between the feed lifting tooth shaft and the feed lifting tooth connecting part of the tooth frame, wherein the feed lifting tooth shaft or the lower shaft is in transmission connection with the feed lifting tooth thread driving source and is driven to rotate by the feed lifting tooth thread driving source, the rotation speed ratio of the lower shaft to the feed lifting tooth shaft is 2:1 through the shaft transmission unit, and the rotary shuttle is fixed at the end part of the lower shaft.

Further, the lifting tooth transmission unit comprises a first lifting tooth eccentric wheel fixed on the lifting tooth shaft and a first lifting tooth connecting rod, the first lifting tooth eccentric wheel is provided with a first lifting tooth eccentric shaft part eccentric to the lifting tooth shaft, one end of the first lifting tooth connecting rod is rotatably arranged on the first lifting tooth eccentric shaft part, and the other end of the first lifting tooth connecting rod is hinged with the lifting tooth connecting part of the tooth frame.

Furthermore, the feed lifting transmission unit comprises a second feed lifting eccentric wheel fixed on the feed lifting shaft, a second feed lifting connecting rod, a transmission shaft parallel to the feed lifting shaft, a feed lifting swing rod fixed at one end of the transmission shaft, a feed lifting crank fixed at the other end of the transmission shaft and a third feed lifting connecting rod, the second feed lifting eccentric wheel is provided with a second feed lifting eccentric shaft part eccentric to the feed lifting shaft, one end of the second feed lifting connecting rod is rotatably arranged on the second feed lifting eccentric shaft part, the other end of the second feed lifting connecting rod is hinged with the feed lifting swing rod, and two ends of the third feed lifting connecting rod are respectively hinged with the feed lifting crank and the feed lifting connecting part of the dental articulator.

Furthermore, the tooth lifting transmission unit comprises a second tooth lifting eccentric wheel fixed on the tooth lifting shaft, a second tooth lifting connecting rod, a transmission shaft parallel to the tooth lifting shaft, a tooth lifting swing rod fixed at one end of the transmission shaft, a tooth lifting fork-shaped crank fixed at the other end of the transmission shaft and a tooth lifting sliding block, the second tooth lifting eccentric wheel is provided with a second tooth lifting eccentric shaft part eccentric to the tooth lifting shaft, one end of the second tooth lifting connecting rod is rotatably arranged on the second tooth lifting eccentric shaft part, the other end of the second tooth lifting connecting rod is hinged with the tooth lifting swing rod, a tooth lifting sliding groove in sliding fit with the tooth lifting sliding block is formed in the tooth lifting fork-shaped crank, and the tooth lifting sliding block is hinged with the tooth lifting connecting part of the tooth frame.

Further, the shaft transmission unit comprises a first belt wheel fixed on the lower shaft, a second belt wheel fixed on the feed lifting shaft and a transmission belt connecting the first belt wheel and the second belt wheel.

Further, the shaft transmission unit comprises a first gear fixed on the feed lifting rock shaft, an intermediate shaft rotatably supported in the sewing machine shell, a second gear fixed on the intermediate shaft and a third gear fixed on the lower shaft, one of the feed lifting rock shaft, the lower shaft and the intermediate shaft is in transmission connection with the feeding thread hooking driving source and is driven to rotate by the feeding thread hooking driving source, the first gear is meshed with the second gear, and the second gear is meshed with the third gear.

Furthermore, the shaft transmission unit comprises a first gear fixed on the feed lifting tooth shaft and a third gear fixed on the lower shaft, the feed lifting tooth shaft or the lower shaft is in transmission connection with the feed line hooking driving source and is driven to rotate by the feed line hooking driving source, and the first gear is meshed with the third gear. .

Furthermore, the feed lifting tooth thread-hooking transmission mechanism is internally provided with a feed lifting tooth shaft which is rotatably supported in a sewing machine shell, the second feed transmission mechanism comprises a feed feeding shaft which is parallel to the feed lifting tooth shaft, a feed eccentric wheel which is fixed on the feed lifting tooth shaft, a first feed connecting rod, a feed swinging seat with a fixed swinging fulcrum, a first feed swinging rod, a second feed swinging rod, and a first feed crank and a tooth frame seat which are all fixed on the feed feeding shaft, one end of the first feed connecting rod is rotatably arranged on the feed eccentric wheel, the other end of the first feed connecting rod, one end of the first feed swinging rod and one end of the second feed swinging rod are coaxially hinged, the other end of the first feed swinging rod is hinged with the feed swinging seat, the other end of the second feed swinging rod is hinged with the first feed crank, and the tooth frame seat is hinged with a feed connecting part of a feed frame.

Furthermore, pay-off colludes line mechanism still includes independently from pay-off colludes the gauge needle adjustment module of line module, the gauge needle adjustment module includes independently from pay-off colludes the gauge needle of line driving source and adjusts the driving source, the gauge needle is adjusted the driving source and is connected, drive work feed swing seat around its fixed swing fulcrum rotation with work feed swing seat transmission.

The application also provides a sewing machine, wherein the feeding thread hooking mechanism is configured in the sewing machine.

As mentioned above, the flexibly adjustable feeding and thread hooking mechanism and the sewing machine provided by the invention have the following beneficial effects:

in this application, with the tooth lifting function of sewing machine and collude the integration of line function and be an independent functional module, use independent pay-off collude line driving source drive collude line and tooth lifting, it is adjustable to have realized being used for driving the relative chronogenesis of eedle moving driving source among pay-off collude line driving source and the sewing machine, thereby can adjust the cooperation chronogenesis of rotating shuttle and eedle, and the up-and-down reciprocating motion of feed dog and the cooperation chronogenesis of eedle, thereby can adjust the motion trail form of feed dog, thereby greatly promote sewing machine's sewing adaptability.

Drawings

Fig. 1 is a schematic view showing a structure of a sewing machine in the prior art.

Fig. 2 is a schematic structural diagram of a first embodiment of a flexibly adjustable feeding and hooking mechanism in the present application.

Fig. 3 is a schematic structural view of the feeding hooking module in fig. 2.

Fig. 4 is a schematic structural diagram of the cloth feeding module in fig. 2.

Fig. 5 is a schematic diagram illustrating a change of a motion trajectory of the feed dog in fig. 2.

Fig. 6 is a schematic structural view of a second embodiment of a flexibly adjustable feeding and hooking mechanism in the present application.

Fig. 7 is a schematic structural view of a third embodiment of a flexibly adjustable feeding and hooking mechanism in the present application.

Fig. 8 is a schematic structural diagram of a fourth embodiment of a flexibly adjustable feeding and hooking mechanism in the present application.

Fig. 9 and 10 are schematic structural views of a fifth embodiment of a flexibly adjustable feeding and hooking mechanism in the present application at different viewing angles.

Fig. 11 is a schematic structural diagram of a feed lifting transmission unit in a sixth embodiment of the flexibly adjustable feed hooking mechanism in the application.

Fig. 12 is a schematic structural view of a modular sewing machine equipped with a first feeding and hooking mechanism according to the first embodiment of the present application.

Fig. 13 is a schematic structural view of a modular sewing machine equipped with a fifth feeding and hooking mechanism according to the present application.

Fig. 14 is a schematic structural view of a seventh embodiment of a flexibly adjustable feeding and hooking mechanism in the present application.

Fig. 15 is a schematic structural view of the feeding thread hooking module in fig. 14.

Fig. 16 is a schematic structural view of the shaft transmission unit in fig. 14.

Fig. 17 is a schematic structural diagram of an eighth embodiment of a flexibly adjustable feeding thread hooking mechanism in the present application.

Fig. 18 is a schematic structural diagram of a ninth embodiment of a flexibly adjustable feeding thread hooking mechanism in the present application.

Fig. 19 is a schematic structural diagram of a flexible adjustable feeding thread hooking mechanism according to an embodiment of the present application.

Fig. 20 is a schematic structural view of the lifting tooth transmission unit in fig. 19.

Fig. 21 is a schematic structural view of the shaft transmission unit in fig. 19.

Fig. 22 is a schematic structural view of a modular sewing machine equipped with a seventh embodiment of a feeding and hooking mechanism according to the present application.

Description of the element reference numerals

10. Tooth holder

101. Feed lifting tooth connecting part

102. Cloth feeding connecting part

20. Feed dog

30. Feeding thread hooking module

31. Feeding wire hooking driving source

32. Rotating shuttle

33. Feed lifting shaft

34. Lower shaft

350. First feed lifting eccentric wheel

351. First tooth lifting connecting rod

352. Second eccentric cam of lifting tooth

353. Second tooth lifting connecting rod

354. Transmission shaft

355. Swing rod for lifting tooth

356. Feed lifting crank

357. Third feed lifting connecting rod

358. Feed lifting fork shaped crank

359. Feed lifting slider

360. First pulley

361. Second belt wheel

362. Transmission belt

363. First gear

364. Intermediate shaft

365. Second gear

366. Third gear

370. Cloth feeding shaft

371. Cloth feeding eccentric wheel

372. First cloth feeding connecting rod

373. Cloth feeding swing seat

374. First cloth feeding swing rod

375. Second cloth feeding swing rod

376. First cloth feeding crank

40. Cloth feeding module

41. Cloth feeding driving source

42. Dental articulator holder

43. First cloth feeding crank

44. First cloth feeding connecting rod

50. Needle pitch adjusting module

51. Needle pitch adjusting drive source

60. Cloth-pricking and thread-taking-up module

61. Driving source for cloth-pricking and thread-taking-up

62. Needle bar

63. Needle

70. Supporting seat

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be made without substantial technical changes and modifications.

The application provides a sewing machine, in particular to a modular sewing machine, which is provided with a flexibly adjustable feeding thread hooking mechanism. For convenience of description, the moving direction of the sewing material in the front sewing of the modular sewing machine is defined as the front direction; defining a horizontal direction orthogonal to the front-rear direction as a left-right direction; a vertical direction orthogonal to the front-rear direction is defined as an up-down direction. Several preferred embodiments of modular sewing machines are provided as follows. Several preferred embodiments for providing a flexibly adjustable feed looper and modular sewing machine are described below.

Feeding and line hooking mechanism capable of being flexibly adjusted

As shown in fig. 2 and 3, the flexibly adjustable feeding thread hooking mechanism comprises a dental frame 10, a feed dog 20 fixedly mounted on the dental frame 10, and a feeding thread hooking module 30; the feeding thread hooking module 30 comprises a feeding thread hooking driving source 31, a rotatable rotating shuttle 32, a tooth lifting connecting part 101 arranged at the rear end of the dental articulator 10 and a tooth lifting thread hooking transmission mechanism, wherein the feeding thread hooking driving source 31 is connected with the rotating shuttle 32 and the tooth lifting connecting part 101 of the dental articulator 10 through the tooth lifting thread hooking transmission mechanism. In particular, the feeding hook driving source 31 is independent of a driving source for driving the needle 63 to operate in the sewing machine, and the driving source for driving the needle 63 to operate in the sewing machine is defined as the cloth-piercing take-up driving source 61 as follows. The feeding and thread hooking driving source 31 is a motor.

When the modular sewing machine provided with the first feeding and thread hooking mechanism operates, the feeding and thread hooking driving source 31 operates, and the feeding and thread hooking driving source 31 drives the rotating shuttle 32 to circumferentially rotate through the tooth lifting and thread hooking transmission mechanism to execute thread hooking action; the feeding thread hooking driving source 31 drives the tooth rack 10 to reciprocate up and down through the tooth lifting thread hooking transmission mechanism, and the tooth rack 10 drives the cloth feeding teeth 20 to reciprocate up and down together to perform tooth lifting action. Thus, the feeding thread hooking module 30 completes the thread hooking action and the thread lifting action, and is cooperated with other functional modules in the sewing machine to complete the sewing. Particularly, the feed hooking module 30 integrates the tooth lifting function and the thread hooking function of the sewing machine into an independent feed hooking module 30, and the independent feed hooking driving source 31 is used for driving the hook and the tooth lifting, so that the relative time sequence of the feed hooking driving source 31 and a cloth pricking and picking driving source 61 for driving a needle 63 to operate in the sewing machine can be adjusted, the matching time sequence of a rotating shuttle 32 and the needle 63 and the matching time sequence of the up-and-down reciprocating motion of a cloth feeding tooth 20 and the needle 63 can be adjusted, the motion track form of the cloth feeding tooth 20 can be adjusted, and the sewing adaptability of the sewing machine is greatly improved.

Further, as shown in fig. 2 and 3, the feeding thread hooking mechanism further includes a cloth feeding module 40 independent from the feeding thread hooking module 30, the cloth feeding module 40 includes a cloth feeding driving source 41, a cloth feeding connecting portion 102 disposed at the front end of the dental articulator 10, and a first cloth feeding transmission mechanism, the cloth feeding driving source 41 is connected to the cloth feeding connecting portion 102 of the dental articulator 10 through the first cloth feeding transmission mechanism to drive the dental articulator 10 to reciprocate back and forth, and the dental articulator 10 drives the cloth feeding teeth 20 to reciprocate back and forth together to perform a cloth feeding action. In particular, the feeding hook driving source 31 and the feeding cloth driving source 41 are independent of each other, and the feeding cloth driving source 41 is also independent of the needle-sticking and thread-taking-up driving source 61 for driving the needle 63 to operate in the sewing machine. The cloth feeding drive source 41 is a motor. Preferably, as shown in fig. 2 and 4, the first cloth feeding transmission mechanism includes a second cloth feeding crank 43 having one end fixed on the motor shaft of the cloth feeding driving source 41, a second cloth feeding link 44, and a rack holder 42 having a fixed swing fulcrum, and both ends of the second cloth feeding link 44 are respectively hinged with the other end of the second cloth feeding crank 43 and the rack holder 42. When the cloth feeding driving source 41 rotates, the second cloth feeding crank 43 is driven to swing back and forth, and the feed dog 10 and the feed dog 20 are driven to reciprocate back and forth by the second cloth feeding link 44 and the feed dog seat 42, thereby performing a cloth feeding operation.

Therefore, one embodiment of the feeding thread hooking mechanism comprises two functional modules: the feeding thread hooking module 30 and the cloth feeding module 40 are independent of each other, the feeding thread hooking module 30 is also a tooth lifting thread hooking module, the independent feeding thread hooking driving source 31 is used for driving thread hooking and tooth lifting, the independent cloth feeding module 40 is used for driving cloth feeding, and the driving of thread hooking and tooth lifting and the driving of cloth feeding are independent of the driving of cloth pricking and thread picking in the sewing machine. Therefore, on one hand, the relative time sequence of the feeding thread hooking driving source 31 and the cloth pricking and picking driving source 61 is adjustable, so that the matching time sequence of the rotating shuttle 32 and the machine needle 63 can be adjusted, the morning and evening of the thread hooking time of the rotating shuttle 32 relative to the machine needle 63 are adjusted, the thread hooking time is earlier when thin materials are sewn, and the thread hooking time is later when thick materials are sewn; on the other hand, the relative timing of the feeding and hooking driving source 31 and the feeding driving source 41 can be adjusted, the output rule of the feeding and hooking driving source 41 relative to the feeding and hooking driving source 31 can be adjusted, the stitch length adjustment, the forward and backward sewing switching and the changing of the feeding track form of the feed dog 20 can be performed, for example, an oval feeding track as shown in fig. 5a, a front triangular feeding track as shown in fig. 5b, a rear triangular feeding track as shown in fig. 5c or a rectangular feeding track as shown in fig. 5d can be realized, wherein the oval feeding track and the front triangular feeding track are suitable for sewing thin materials and medium and thick materials, and the rear triangular feeding track and the rectangular feeding track are suitable for sewing thick materials. Therefore, the first feeding thread hooking mechanism embodiment can adjust the thread hooking time of the rotating shuttle 32 relative to the machine needle 63, the cloth feeding track of the cloth feeding tooth 20 and greatly improve the sewing adaptability of the sewing machine.

Further, as shown in fig. 2 and 3, the feed hook transmission mechanism includes a feed hook shaft 33 and a lower shaft 34 both rotatably supported in the sewing machine housing, a shaft transmission unit connected between the feed hook shaft 33 and the lower shaft 34, and a feed hook transmission unit connected between the feed hook shaft 33 and the feed hook connecting portion 101 of the hook frame 10, the feed hook shaft 33 and the lower shaft 34 both extend in the left-right direction, the right end of the feed hook shaft 33 is fixed to the motor shaft of the feed hook driving source 31 via a coupling, so that the feed hook shaft 33 is directly driven to rotate by the feed hook driving source 31, the feed hook shaft 33 in turn drives the lower shaft 34 to rotate circumferentially around the central axis thereof via the shaft transmission unit, and the shaft transmission unit makes the rotation speed ratio of the lower shaft 34 to the feed hook shaft 33 be 2:1, and the rotating shuttle 32 is fixed to the end of the lower shaft 34.

Preferably, as shown in fig. 2 and 3, the shaft transmission unit includes a first pulley 360 fixed to the lower shaft 34, a second pulley 361 fixed to the feed dog shaft 33, and a transmission belt 362 connecting the first pulley 360 and the second pulley 361. The feed dog transmission unit includes a first feed dog eccentric 350 fixed to the left end of the feed dog shaft 33, and a first feed dog connecting rod 351, the first feed dog eccentric 350 having a first feed dog eccentric shaft portion eccentric to the feed dog shaft 33, the first feed dog connecting rod 351 having one end rotatably mounted to the first feed dog eccentric shaft portion and the other end hinged to the feed dog connecting portion 101 of the dental articulator 10.

Feeding and hooking mechanism embodiment II capable of being flexibly adjusted

The difference between the second embodiment of the flexibly adjustable feeding thread hooking mechanism and the first embodiment of the flexibly adjustable feeding thread hooking mechanism is that: the feeding thread hooking driving source 31 is different from the connection point of the tooth lifting thread hooking transmission mechanism. Specifically, as shown in fig. 6, the right end of the lower shaft 34 is fixedly connected to the motor shaft of the feeding hook driving source 31 through the coupling, so that the lower shaft 34 is directly driven by the feeding hook driving source 31 to rotate, the lower shaft 34 drives the feed lifting teeth shaft 33 to rotate through the shaft transmission unit, and the rotation speed ratio of the lower shaft 34 to the feed lifting teeth shaft 33 is 2:1 through the shaft transmission unit. The shaft transmission unit is still in the form of a synchronous pulley.

Third embodiment of flexibly adjustable feeding and hooking mechanism

The difference between the third embodiment of the flexibly adjustable feeding and hooking mechanism and the first embodiment of the flexibly adjustable feeding and hooking mechanism is that: the shaft transmission units differ in their structure. Specifically, as shown in fig. 7, the shaft transmission unit includes a first gear 363 fixed to the feed dog shaft 33, an intermediate shaft 364 rotatably supported in the sewing machine housing and parallel to the feed dog shaft 33, a second gear 365 fixed to the intermediate shaft 364, and a third gear 366 fixed to the lower shaft 34, the right end of the feed dog shaft 33 is fixed to the motor shaft of the feeding hook driving source 31 through a coupling, the feed dog shaft 33 is directly driven to rotate by the feeding hook driving source 31, the first gear 363 is engaged with the second gear 365, and the second gear 365 is engaged with the third gear 366.

Flexibly adjustable feeding and hooking mechanism

The fourth embodiment of the flexibly adjustable feeding and hooking mechanism is different from the first embodiment of the flexibly adjustable feeding and hooking mechanism only in that: the shaft transmission units differ in their structure. Specifically, as shown in fig. 8, the shaft transmission unit includes a first gear 363 fixed to the feed dog shaft 33, an intermediate shaft 364 rotatably supported in the sewing machine housing and parallel to the feed dog shaft 33, a second gear 365 fixed to the intermediate shaft 364, and a third gear 366 fixed to the lower shaft 34, the right end of the intermediate shaft 364 is fixed to the motor shaft of the feeding hook driving source 31 through a coupling, the intermediate shaft 364 is directly driven to rotate by the feeding hook driving source 31, the first gear 363 is engaged with the second gear 365, and the second gear 365 is engaged with the third gear 366.

Flexibly adjustable feeding and hooking mechanism embodiment five

The difference between the embodiment five of the feeding thread hooking mechanism capable of being flexibly adjusted and the embodiment one of the feeding thread hooking mechanism capable of being flexibly adjusted is that: the shaft transmission unit and the feed lifting transmission unit have different structures. Specifically, as shown in fig. 9 and 10, the shaft transmission unit includes a first gear 363 fixed to the feed lifting shaft 33 and a third gear 366 fixed to the lower shaft 34, the right end of the feed lifting shaft 33 is fixedly connected to the motor shaft of the feeding hook driving source 31 through a coupling, so that the feed lifting shaft 33 is directly driven to rotate by the feeding hook driving source 31, and the first gear 363 is engaged with the third gear 366, so as to drive the lower shaft 34 to rotate. The feed lifting transmission unit comprises a second feed lifting eccentric 352 fixed on the feed lifting shaft 33, a second feed lifting connecting rod 353, a transmission shaft 354 parallel to the feed lifting shaft 33, a feed lifting swing rod 355 fixed on the right end of the transmission shaft 354, a feed lifting crank 356 fixed on the left end of the transmission shaft 354 and a third feed lifting connecting rod 357, wherein the second feed lifting eccentric 352 is provided with a second feed lifting eccentric shaft part eccentric to the feed lifting shaft 33, one end of the second feed lifting connecting rod 353 is rotatably arranged on the second feed lifting eccentric shaft part, the other end of the second feed lifting connecting rod is hinged with the feed lifting swing rod 355, and two ends of the third feed lifting connecting rod 357 are respectively hinged with the feed lifting crank 356 and the feed lifting connecting part 101 of the dental articulator 10.

Flexibly adjustable feeding and hooking mechanism embodiment six

The difference between the sixth embodiment of the flexibly adjustable feeding thread hooking mechanism and the fifth embodiment of the flexibly adjustable feeding thread hooking mechanism is that: the tooth lifting transmission unit has a different structure, and more particularly, the transmission shaft 354 has a different connection structure with the tooth lifting connection portion 101 of the dental articulator 10. Specifically, as shown in fig. 9 and 11, the lifting tooth transmission unit includes a second lifting tooth eccentric wheel 352 fixed to the lifting tooth shaft 33, a second lifting tooth connecting rod 353, a transmission shaft 354 parallel to the lifting tooth shaft 33, a lifting tooth swing rod 355 fixed to the right end of the transmission shaft 354, a lifting tooth fork-shaped crank 358 fixed to the left end of the transmission shaft 354, and a lifting tooth slider 359, the second lifting tooth eccentric wheel 352 has a second lifting tooth eccentric shaft portion eccentric to the lifting tooth shaft 33, one end of the second lifting tooth connecting rod 353 is rotatably mounted to the second lifting tooth eccentric shaft portion, the other end of the second lifting tooth connecting rod is hinged to the lifting tooth swing rod 355, the lifting tooth fork-shaped crank 358 is provided with a lifting tooth sliding groove slidably fitted to the lifting tooth slider 359, and the lifting tooth slider 359 is hinged to the lifting tooth connecting portion 101 of the tooth holder 10.

In the first to sixth embodiments of the flexibly adjustable feeding and hooking mechanism, the feeding and hooking mechanism includes two feeding and hooking modules 30 (i.e., tooth lifting and hooking modules) and a cloth feeding module 40 which are independent of each other and each use an independent driving source. Based on this, the present application further provides a modular sewing machine having at least three independent functional modules, and the modular sewing machine comprises any one of the feeding and hooking mechanisms of the first to sixth embodiments of the feeding and hooking mechanism and the cloth pricking and picking module 60.

For example, as shown in fig. 12, the modular sewing machine comprises the first feeding hook mechanism and the first taker-in and take-up module 60, that is, the first feeding hook module 30, the cloth feeding module 40 and the taker-in and take-up module 60, wherein the feeding hook module 30, the cloth feeding module 40 and the taker-in and take-up module 60 are three independent functional modules; the cloth-stabbing thread-taking-up module 60 includes the cloth-stabbing thread-taking-up driving source 61, a needle bar 62 capable of reciprocating up and down, a machine needle 63 mounted at the lower end of the needle bar 62, a thread-taking-up lever capable of reciprocating up and down, and a cloth-stabbing thread-taking-up transmission mechanism, wherein the cloth-stabbing thread-taking-up driving source 61 is connected with the needle bar 62 and the thread-taking-up lever through the cloth-stabbing thread-taking-up transmission mechanism to drive the needle bar 62 and the thread-taking-up lever to move. The cloth pricking and taking-up driving source 61, the feeding and hooking driving source 31 and the cloth feeding driving source 41 are three mutually independent driving sources. The thorn cloth take-up module 60, pay-off collude line module 30 and work feed module 40 and carry out the modularization, every functional module all adopts independent driving source to drive, make thorn cloth take-up module 60, mutual independence between pay-off collude line module 30 and the work feed module 40, mutual noninterference, cancel the transmission structure between last axle and other functional modules in the former sewing machine, the driving chain of each functional module has been shortened on the one hand, avoid because of the vibration that the driving chain overlength caused, problems such as noise, on the other hand can adjust the relative motion chronogenesis and the motion law of each functional module, promote sewing adaptability.

For another example, as shown in fig. 13, the modular sewing machine includes the fifth feeding hook mechanism embodiment and the cloth-pricking and thread-taking-up module 60, and the structure of the cloth-pricking and thread-taking-up module 60 is the same as that of the cloth-pricking and thread-taking-up module 60 shown in fig. 12. In addition, as shown in fig. 13, the fifth feeding and thread hooking mechanism further includes a supporting seat 70 fixed to a bottom plate portion of the sewing machine housing, the feeding and thread hooking driving source 31 is fixedly mounted on the supporting seat 70 by screws, and the intermediate shaft 364, the lifting tooth shaft 33 and the lower shaft 34 are rotatably supported and mounted on the supporting seat 70 by bearings, that is, are relatively supported and mounted on the sewing machine housing. The supporting seat 70 has a cavity with an upward opening, the transmission component in the shaft transmission unit is located in the cavity of the supporting seat 70, and the cavity of the supporting seat 70 is filled with grease or lubricating oil to lubricate the transmission component in the shaft transmission unit. Moreover, the support seat 70 is hermetically connected with a cover plate at the upper opening of the cavity, so as to seal the cavity, thereby forming a closed space and preventing pollution.

Feeding and line hooking mechanism embodiment with flexible adjustment

As shown in fig. 14 and 15, the seventh embodiment of the flexibly adjustable feeding and thread hooking mechanism comprises a dental frame 10, a feed dog 20 fixedly mounted on the dental frame 10, and a feeding and thread hooking module 30; the feeding thread hooking module 30 comprises a feeding thread hooking driving source 31, a rotatable rotating shuttle 32, a tooth lifting connecting part 101 arranged at the rear end of the dental articulator 10, a tooth lifting thread hooking transmission mechanism, a cloth feeding connecting part 102 arranged at the front end of the dental articulator 10 and a second cloth feeding transmission mechanism, wherein the feeding thread hooking driving source 31 is connected with the rotating shuttle 32 and the tooth lifting connecting part 101 of the dental articulator 10 through the tooth lifting thread hooking transmission mechanism, and one transmission part in the tooth lifting thread hooking transmission mechanism is connected with the cloth feeding connecting part 102 of the dental articulator 10 through the second cloth feeding transmission mechanism. In particular, the feeding hook driving source 31 is independent of the cloth-piercing take-up driving source 61 for driving the operation of the needle 63 in the sewing machine. The feeding and thread hooking driving source 31 is a motor.

When the modular sewing machine provided with the seventh feeding and thread hooking mechanism is operated, the feeding and thread hooking driving source 31 is operated, and the feeding and thread hooking driving source 31 drives the rotating shuttle 32 to circumferentially rotate through the tooth lifting and thread hooking transmission mechanism to execute thread hooking action; the feeding thread hooking driving source 31 drives the tooth frame 10 and the feed dog 20 to reciprocate up and down through the feed dog thread hooking transmission mechanism to perform the feed dog action; one transmission part in the feed lifting thread hooking transmission mechanism drives the tooth rack 10 and the feed dog 20 to reciprocate back and forth through a second feed transmission mechanism to execute feed action; so that the feed dog 20 performs a combined motion of up-down reciprocating motion and back-and-forth reciprocating motion. Thus, the feeding thread hooking module 30 completes the thread hooking action, the tooth lifting action and the cloth feeding action, and is cooperated with other functional modules in the sewing machine to complete the sewing. Particularly, the feed hook module 30 integrates the feed lifting function, the cloth feeding function and the hook function of the sewing machine into an independent feed hook module, and the independent feed hook driving source 31 is used for driving the hook, the feed lifting and the cloth feeding, so that the relative time sequence of the feed hook driving source 31 and a cloth pricking and picking driving source 61 for driving a machine needle 63 to operate in the sewing machine can be adjusted, the matching time sequence of a rotating shuttle 32 and the machine needle 63 and the matching time sequence of the movement of the cloth feeding tooth 20 and the machine needle 63 can be adjusted, the movement track form of the cloth feeding tooth 20 can be adjusted, and the sewing adaptability of the sewing machine can be greatly improved.

Further, as shown in fig. 14 and 15, the feed lifting hook transmission mechanism includes a feed lifting hook shaft 33 and a lower shaft 34 both rotatably supported in the sewing machine housing, a shaft transmission unit connected between the feed lifting hook shaft 33 and the lower shaft 34, and a feed lifting hook transmission unit connected between the feed lifting hook shaft 33 and the feed lifting hook connection portion 101 of the hook frame 10, the feed lifting hook shaft 33 and the lower shaft 34 both extend in the left-right direction, the right end of the feed lifting hook shaft 33 is fixed to the motor shaft of the feed lifting hook driving source 31 through a coupling, so that the feed lifting hook shaft 33 is directly driven to rotate by the feed lifting hook driving source 31, the feed lifting hook shaft 33 drives the lower shaft 34 to rotate through the shaft transmission unit, and the shaft transmission unit makes the rotation ratio of the lower shaft 34 to the feed lifting hook shaft 33 be 2:1, a rotary hook 32 is fixed to the end of the lower shaft 34, and the feed lifting hook shaft 33 is connected to the feed connection portion 102 of the hook frame 10 through a second feed transmission mechanism.

As shown in fig. 16, the shaft transmission unit includes a first gear 363 fixed to the feed dog shaft 33, a middle shaft 364 rotatably supported in the sewing machine housing in parallel with the feed dog shaft 33, a second gear 365 fixed to the middle shaft 364, and a third gear 366 fixed to the lower shaft 34, the right end of the feed dog shaft 33 is fixed to the motor shaft of the feed hook driving source 31 through a coupling, the feed dog shaft 33 is directly driven to rotate by the feed hook driving source 31, the first gear 363 is engaged with the second gear 365, and the second gear 365 is engaged with the third gear 366.

As shown in fig. 14 and 15, the lifting tooth transmission unit includes a first lifting tooth eccentric wheel 350 fixed to the left end of the lifting tooth shaft 33, the first lifting tooth eccentric wheel 350 having a first lifting tooth eccentric shaft portion eccentric to the lifting tooth shaft 33, and a first lifting tooth connecting rod 351 having one end rotatably mounted to the first lifting tooth eccentric shaft portion and the other end hinged to the lifting tooth connecting portion 101 of the dental articulator 10.

As shown in fig. 14 and 15, the second cloth feeding transmission mechanism includes a cloth feeding shaft 370 parallel to the feed lifting shaft 33, a cloth feeding eccentric 371 fixed to the feed lifting shaft 33, a first cloth feeding link 372, a cloth feeding swing seat 373 having a fixed swing fulcrum, a first cloth feeding swing lever 374, a second cloth feeding swing lever 375, a first cloth feeding crank 376 fixed to the right end of the cloth feeding shaft 370, and a carrier seat 42 fixed to the left end of the cloth feeding shaft 370, the rear end of the first cloth feeding link 372 is rotatably mounted to the cloth feeding eccentric 371, the front end of the first cloth feeding link 372, one end of the first cloth feeding swing lever 374, and one end of the second cloth feeding swing lever 375 are hinged to a coaxial line 374, the other end of the first cloth feeding swing lever 373 is hinged to the cloth feeding swing seat 373, the other end of the second cloth feeding swing lever 375 is hinged to the first cloth feeding crank, and the carrier seat 42 is hinged to the cloth feeding connection portion 102 of the carrier 10. The angle of the feeding swing seat 373 determines the transmission efficiency of the second feeding transmission mechanism, that is, the swing amplitude of the feed lifting pin shaft 33 driving the feeding pin shaft 370 to swing back and forth through the second feeding transmission mechanism, or the motion amplitude of the reciprocating motion of the feed dog 20 and the feed dog 10, so as to determine the needle pitch of the modular sewing machine.

Further, as shown in fig. 14 and 15, the seventh embodiment of the flexibly adjustable feeding hook mechanism further includes a needle pitch adjusting module 50 independent from the feeding hook module 30, the needle pitch adjusting module 50 includes a needle pitch adjusting driving source 51 independent from the feeding hook driving source 31, and the needle pitch adjusting driving source 51 is in transmission connection with the cloth feeding swing seat 373 and drives the cloth feeding swing seat 373 to rotate around a fixed swing fulcrum thereof. The needle pitch adjusting driving source 51 is a motor, and a motor shaft of the needle pitch adjusting driving source 51 is fixedly connected with the feeding swing seat 373, so that the needle pitch adjusting driving source 51 can directly drive the feeding swing seat 373 to rotate around a fixed swing fulcrum thereof, thereby changing or maintaining the angle of the feeding swing seat 373, and accordingly changing or maintaining the needle pitch of the modular sewing machine. The fixed swing fulcrum of the cloth feeding swing seat 373 is located on the center axis of the motor shaft of the needle pitch adjusting drive source 51, and the motor shaft of the needle pitch adjusting drive source 51 extends left and right.

Feeding and line hooking mechanism capable of being flexibly adjusted

The eighth embodiment of the flexibly adjustable feeding thread hooking mechanism and the seventh embodiment of the flexibly adjustable feeding thread hooking mechanism are different only in that: the connection form of the feed lifting thread hooking driving source 31 and the feed lifting thread hooking driving mechanism is different. Specifically, as shown in fig. 17, the motor shaft of the feeding hook driving source 31 is connected to the right end of the lower shaft 34 through a coupling, so that the lower shaft 34 is directly driven to rotate by the feeding hook driving source 31, the lower shaft 34 drives the feed lifting teeth shaft 33 to rotate through the shaft transmission unit, and the feed lifting teeth shaft 33 drives the feed shaft 370 to swing through the second feed transmission mechanism.

Flexibly adjustable feeding and hooking mechanism

The ninth feeding and thread hooking mechanism embodiment capable of being flexibly adjusted is different from the seventh feeding and thread hooking mechanism embodiment capable of being flexibly adjusted only in that: the connection form of the feed lifting thread hooking driving source 31 and the feed lifting thread hooking driving mechanism is different. Specifically, as shown in fig. 18, a motor shaft of the feeding hook driving source 31 is connected to a right end of the intermediate shaft 364 through a coupling, so that the intermediate shaft 364 is directly driven to rotate by the feeding hook driving source 31, the intermediate shaft 364 drives the feed lifting teeth shaft 33 and the lower shaft 34 to rotate through the shaft transmission unit, and the feed lifting teeth shaft 33 drives the feed shaft 370 to swing through the second feed transmission mechanism.

Ten embodiments of flexibly adjustable feeding and thread hooking mechanism

The flexible adjustable feeding thread hooking mechanism embodiment ten is different from the flexible adjustable feeding thread hooking mechanism embodiment seven only in that: the structures of the tooth lifting thread hooking transmission mechanisms are different. Specifically, as shown in fig. 19 and 20, the feed dog transmission unit includes a second feed dog eccentric 352 fixed to the left end of the feed dog shaft 33, a second feed dog connecting rod 353, a transmission shaft 354 parallel to the feed dog shaft 33 and distributed on the left side of the feed dog shaft 33, a feed dog swing rod 355 fixed to the right end of the transmission shaft 354, a feed dog crank 356 fixed to the left end of the transmission shaft 354, and a third feed dog connecting rod 357, wherein the second feed dog eccentric 352 has a second feed dog eccentric shaft portion eccentric to the feed dog shaft 33, one end of the second feed dog connecting rod 353 is rotatably mounted to the second feed dog eccentric shaft portion, the other end of the second feed dog connecting rod is hinged to the feed dog swing rod 355, and both ends of the third feed dog connecting rod 357 are respectively hinged to the feed dog crank 356 and the feed dog connecting portion 101 of the dental articulator 10. In the tenth embodiment of the feeding and hooking mechanism, the shaft transmission unit is provided without an intermediate shaft 364, as shown in fig. 19 and 21, the shaft transmission unit includes a first gear 363 fixed to the feed lifting tooth shaft 33 and a third gear 366 fixed to the right end of the lower shaft 34, the right end of the feed lifting tooth shaft 33 is fixed to the motor shaft of the feeding and hooking drive source 31 through a coupling, the feed lifting tooth shaft 33 is directly driven to rotate by the feeding and hooking drive source 31, and the first gear 363 and the third gear 366 are engaged.

Eleventh embodiment of flexibly adjustable feeding and hooking mechanism

The difference between the eleventh embodiment of the feeding and hooking mechanism capable of being flexibly adjusted and the tenth embodiment of the feeding and hooking mechanism capable of being flexibly adjusted is only that: the connection structure between the drive shaft 354 and the dental articulator 10 in the feed-forward drive unit is different. Specifically, in the eleventh feeding and thread hooking mechanism embodiment, the transmission shaft 354 and the tooth holder 10 are in the form of a tooth lifting fork-shaped crank 358 and a tooth lifting slider 359 as shown in fig. 11. Therefore, the feed dog transmission unit comprises a second feed dog eccentric 352 fixed at the left end of the feed dog shaft 33, a second feed dog connecting rod 353, a transmission shaft 354 parallel to the feed dog shaft 33 and distributed at the left side of the feed dog shaft 33, a feed dog swing rod 355 fixed at the right end of the transmission shaft 354, a feed dog fork-shaped crank 358 fixed at the left end of the transmission shaft 354 and a feed dog sliding block 359, wherein the second feed dog eccentric 352 is provided with a second feed dog eccentric shaft part eccentric to the feed dog shaft 33, one end of the second feed dog connecting rod 353 is rotatably arranged at the second feed dog eccentric shaft part, the other end of the second feed dog connecting rod is hinged with the feed dog swing rod 355, the feed dog fork-shaped crank 358 is provided with a feed dog sliding groove in sliding fit with the feed dog sliding block 359, the feed dog sliding block 359 is hinged with the feed dog connecting part 101 of the feed dog 10, the feed dog shaft 33 reciprocates to realize the up-and down reciprocating motion of the feed dog 20.

In the seventh to eleventh embodiments of the flexibly adjustable feeding and hooking mechanism, each of the feeding and hooking mechanisms comprises an independent feeding and hooking module 30, and an independent feeding and hooking driving source 31 is adopted, and the feeding and hooking module 30 at least has a hooking function, a tooth lifting function and a cloth feeding function, and preferably also has a needle pitch adjusting function. Based on this, the present application further provides a modular sewing machine having at least two independent functional modules, wherein the modular sewing machine comprises any one of the feeding and hooking mechanisms of the seventh to eleventh embodiments of the feeding and hooking mechanism, and the cloth-pricking and thread-taking-up module 60. For example, as shown in fig. 22, the modular sewing machine comprises the seventh feeding and hooking mechanism and the cloth-stabbing and taking-up module 60, so the modular sewing machine at least comprises the feeding and hooking module 30 and the cloth-stabbing and taking-up module 60, and preferably further comprises the needle pitch adjusting module 50. The cloth-stabbing thread-taking-up module 60 includes the cloth-stabbing thread-taking-up driving source 61, a needle bar 62 capable of reciprocating up and down, a machine needle 63 mounted at the lower end of the needle bar 62, a thread-taking-up lever capable of reciprocating up and down, and a cloth-stabbing thread-taking-up transmission mechanism, wherein the cloth-stabbing thread-taking-up driving source 61 is connected with the needle bar 62 and the thread-taking-up lever through the cloth-stabbing thread-taking-up transmission mechanism to drive the needle bar 62 and the thread-taking-up lever to move.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (13)

1. The utility model provides a pay-off that can flexibly adjust colludes line mechanism, includes dental articulator (10) and installs feed dog (20) on dental articulator (10), its characterized in that: the thread feeding and hooking mechanism is characterized by further comprising a feeding and hooking module (30), wherein the feeding and hooking module (30) comprises a feeding and hooking driving source (31), a rotatable rotating shuttle (32), a tooth lifting connecting part (101) arranged at one end of the tooth rack (10) and a tooth lifting and hooking transmission mechanism, the feeding and hooking driving source (31) is connected with the rotating shuttle (32) and the tooth lifting connecting part (101) of the tooth rack (10) through the tooth lifting and hooking transmission mechanism, and the feeding and hooking driving source (31) is independent of a driving source used for driving a machine needle (63) to run in the sewing machine.

2. The feeding thread hooking mechanism according to claim 1, wherein: the cloth feeding mechanism is characterized by further comprising a cloth feeding module (40) independent of the feeding thread hooking module (30), wherein the cloth feeding module (40) comprises a cloth feeding driving source (41), a cloth feeding connecting part (102) arranged at the other end of the dental articulator (10) and a first cloth feeding transmission mechanism, the cloth feeding driving source (41) is connected with the cloth feeding connecting part (102) of the dental articulator (10) through the first cloth feeding transmission mechanism, and the feeding thread hooking driving source (31) and the cloth feeding driving source (41) are mutually independent.

3. The feeding thread hooking mechanism according to claim 1, wherein: the feeding thread hooking module (30) further comprises a cloth feeding connecting part (102) arranged at the other end of the tooth frame (10) and a second cloth feeding transmission mechanism, and one transmission part in the tooth lifting thread hooking transmission mechanism is connected with the cloth feeding connecting part (102) of the tooth frame (10) through the second cloth feeding transmission mechanism.

4. The feeding thread hooking mechanism according to any one of claims 1 to 3, wherein: the feed lifting tooth thread hooking transmission mechanism comprises a lifting tooth shaft (33) and a lower shaft (34) which are rotatably supported in a sewing machine shell, a shaft transmission unit connected between the lifting tooth shaft (33) and the lower shaft (34), and a lifting tooth transmission unit connected between the lifting tooth shaft (33) and a lifting tooth connecting part (101) of a tooth rack (10), wherein the lifting tooth shaft (33) or the lower shaft (34) is in transmission connection with a feed lifting tooth thread driving source (31) and is driven to rotate by the feed lifting tooth thread driving source (31), the shaft transmission unit enables the rotating speed ratio of the lower shaft (34) to the lifting tooth shaft (33) to be 2:1, and a rotating shuttle (32) is fixed at the end part of the lower shaft (34).

5. The feeding thread hooking mechanism according to claim 4, wherein: the tooth lifting transmission unit comprises a first tooth lifting eccentric wheel (350) fixed on a tooth lifting shaft (33) and a first tooth lifting connecting rod (351), wherein the first tooth lifting eccentric wheel (350) is provided with a first tooth lifting eccentric shaft part eccentric to the tooth lifting shaft (33), one end of the first tooth lifting connecting rod (351) is rotatably arranged on the first tooth lifting eccentric shaft part, and the other end of the first tooth lifting connecting rod is hinged with a tooth lifting connecting part (101) of the tooth frame (10).

6. The feeding thread hooking mechanism according to claim 4, wherein: the tooth lifting transmission unit comprises a second tooth lifting eccentric wheel (352) fixed on a tooth lifting shaft (33), a second tooth lifting connecting rod (353), a transmission shaft (354) parallel to the tooth lifting shaft (33), a tooth lifting swing rod (355) fixed at one end of the transmission shaft (354), a tooth lifting crank (356) fixed at the other end of the transmission shaft (354), and a third tooth lifting connecting rod (357), wherein the second tooth lifting eccentric wheel (352) is provided with a second tooth lifting eccentric shaft part eccentric to the tooth lifting shaft (33), one end of the second tooth lifting connecting rod (353) is rotatably installed on the second tooth lifting eccentric shaft part, the other end of the second tooth lifting connecting rod is hinged with the tooth lifting swing rod (355), and two ends of the third tooth lifting connecting rod (357) are respectively hinged with the tooth lifting crank (356) and a tooth lifting connecting part (101) of the tooth lifting rack (10).

7. The feeding thread hooking mechanism according to claim 4, wherein: the tooth lifting transmission unit comprises a second tooth lifting eccentric wheel (352) fixed on a tooth lifting shaft (33), a second tooth lifting connecting rod (353), a transmission shaft (354) parallel to the tooth lifting shaft (33), a tooth lifting swing rod (355) fixed at one end of the transmission shaft (354), a tooth lifting fork-shaped crank (358) fixed at the other end of the transmission shaft (354) and a tooth lifting sliding block (359), the second tooth lifting eccentric wheel (352) is provided with a second tooth lifting eccentric shaft part eccentric to the tooth lifting shaft (33), one end of the second tooth lifting connecting rod (353) is rotatably installed on the second tooth lifting eccentric shaft part, the other end of the second tooth lifting connecting rod is hinged with the tooth lifting swing rod (355), a tooth lifting sliding groove in sliding fit with the tooth lifting sliding block (359) is formed in the tooth lifting fork-shaped crank (358), and the tooth lifting sliding block (359) is hinged with a tooth lifting connecting part (101) of the tooth rack (10).

8. The feeding thread hooking mechanism according to claim 4, wherein: the shaft transmission unit comprises a first belt wheel (360) fixed on the lower shaft (34), a second belt wheel (361) fixed on the feed lifting shaft (33), and a transmission belt (362) connecting the first belt wheel (360) and the second belt wheel (361).

9. The feeding thread hooking mechanism according to claim 4, wherein: the shaft transmission unit comprises a first gear (363) fixed on a feed lifting shaft (33), a middle shaft (364) rotatably supported in a sewing machine shell, a second gear (365) fixed on the middle shaft (364), and a third gear (366) fixed on a lower shaft (34), one of the feed lifting shaft (33), the lower shaft (34) and the middle shaft (364) is in transmission connection with a feeding and thread hooking driving source (31) and is driven to rotate by the feeding and thread hooking driving source (31), the first gear (363) is meshed with the second gear (365), and the second gear (365) is meshed with the third gear (366).

10. The feeding thread hooking mechanism according to claim 4, wherein: the shaft transmission unit comprises a first gear (363) fixed on the feed lifting tooth shaft (33) and a third gear (366) fixed on the lower shaft (34), the feed lifting tooth shaft (33) or the lower shaft (34) is in transmission connection with the feed line hooking driving source (31) and is driven to rotate by the feed line hooking driving source (31), and the first gear (363) is meshed with the third gear (366).

11. The feeding thread hooking mechanism according to claim 3, wherein: the feed lifting tooth thread hooking transmission mechanism is provided with a feed lifting tooth shaft (33) which is rotatably supported in a sewing machine shell, the second feed conveying transmission mechanism comprises a feed conveying shaft (370) which is parallel to the feed lifting tooth shaft (33), a feed conveying eccentric wheel (371) which is fixed on the feed lifting tooth shaft (33), a first feed conveying connecting rod (372), a feed conveying swing seat (373) with a fixed swing fulcrum, a first feed swinging rod (374), a second feed swinging rod (375), a first feed crank (376) and a tooth frame seat (42) which are all fixed on the feed conveying shaft (370), one end of the first feed conveying connecting rod (372) is rotatably arranged on the feed conveying eccentric wheel (371), the other end of the first feed conveying connecting rod (372), one end of the first feed swinging rod (374) and one end of the second feed conveying swinging rod (375) are hinged together along a same axis, the other end of the first feed swinging rod (374) is hinged with the feed conveying swing seat (373), the other end of the second feed conveying swinging rod (375) is hinged with the first feed conveying crank (376), and the other end of the tooth frame seat (42) is hinged with the feed frame seat (10).

12. The feeding thread hooking mechanism according to claim 11, wherein: the cloth feeding swing mechanism is characterized by further comprising a needle pitch adjusting module (50) independent of the feeding thread hooking module (30), wherein the needle pitch adjusting module (50) comprises a needle pitch adjusting driving source (51) independent of the feeding thread hooking driving source (31), and the needle pitch adjusting driving source (51) is in transmission connection with the cloth feeding swing seat (373) and drives the cloth feeding swing seat (373) to rotate around a fixed swing fulcrum of the cloth feeding swing seat.

13. A sewing machine characterized in that: the sewing machine is provided with a feeding and thread-hooking mechanism of any one of claims 1 to 12.

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