CN115182111A

CN115182111A - Modular sewing machine

Info

Publication number: CN115182111A
Application number: CN202110362573.9A
Authority: CN
Inventors: 郑吉�; 柯祥林; 祝书伟; 郏彬辉
Original assignee: Jack Technology Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2022-10-14
Anticipated expiration: 2041-04-02
Also published as: CN115182111B; WO2022206005A1

Abstract

The invention provides a modularized sewing machine, which comprises a tooth frame, a cloth feeding tooth arranged on the tooth frame, a cloth piercing and taking-up module, a tooth lifting and hooking module and a cloth feeding module, wherein the tooth lifting and hooking module is arranged on the tooth frame; the cloth pricking and thread taking-up module comprises a cloth pricking and thread taking-up driving source, a needle rod, a machine needle, a thread taking-up rod and a cloth pricking and thread taking-up transmission mechanism; the tooth lifting and hooking module comprises a tooth lifting and hooking drive source, a rotating shuttle, a tooth lifting connecting part arranged on the tooth rack and a tooth lifting and hooking transmission mechanism; the cloth feeding module comprises a cloth feeding driving source, a tooth frame seat connected with the tooth frame and a cloth feeding transmission mechanism. This application is with the thorn cloth take-up mechanism in the sewing machine, the lifting tooth colludes line mechanism and work feed mechanism all modularization, and every functional module all adopts independent driving source to drive for mutual independence, mutual noninterference between thorn cloth take-up module, lifting tooth colludes line module and the work feed module shorten the driving chain of each functional module, avoid because of vibration, the noise that the driving chain overlength caused, can also adjust the relative motion chronogenesis of each functional module, promote sewing adaptability.

Description

Modular sewing machine

Technical Field

The invention relates to the field of sewing machines, in particular to a modular sewing machine.

Background

The sewing machine has four basic actions of material needling action, thread picking action, feeding action and thread hooking action, can realize basic sewing of sewing materials, and is added with some auxiliary actions, such as thread cutting action, presser foot lifting action, thread loosening action, needle pitch adjusting action and the like. At present, a sewing machine in the prior art is configured as shown in fig. 1, and mainly includes a main motor, a main shaft 100 driven to rotate by the main motor, a cloth pricking and thread taking-up mechanism 200, a feeding mechanism 300, a thread hooking mechanism 400, a thread cutting mechanism 500, and a presser foot lifting mechanism 600, wherein the cloth pricking and thread taking-up mechanism 200, the feeding mechanism 300, and the thread hooking mechanism 400 are all driven to operate by the main shaft 100, a thread cutting cam in the thread cutting mechanism 500 is driven to rotate by a lower shaft in the thread hooking mechanism 400, the thread cutting mechanism 500 has a thread cutting driving source 501 independent of the main motor, and the presser foot lifting mechanism 600 has a presser foot lifting driving source 601 independent of the main motor. When the sewing machine in the prior art operates, the main motor drives the main shaft 100 to rotate, the main shaft 100 drives the cloth pricking and taking-up mechanism 200, the feeding mechanism 300 and the thread hooking mechanism 400 to operate, and the cloth pricking and taking-up mechanism 200, the feeding mechanism 300 and the thread hooking mechanism 400 cooperatively act to complete sewing; when the thread needs to be cut, the thread cutting driving source 501 acts to enable the transmission component in the thread cutting mechanism 500 to be matched with the thread cutting cam, the main shaft 100 rotates to enable the lower shaft in the thread hooking mechanism 400 to rotate, and therefore the thread cutting mechanism 500 executes the thread cutting action; when the presser foot needs to be lifted, the presser foot lifting drive source 601 operates to cause the presser foot lifting mechanism 600 to perform the presser foot lifting operation. However, the existing sewing machine has the following disadvantages:

1. the transmission structure is very complex; the power of the cloth pricking and picking mechanism 200, the feeding mechanism 300, the thread hooking mechanism 400 and the thread cutting mechanism 500 is from the main shaft 100, or the power sources of the cloth pricking and picking mechanism 200, the feeding mechanism 300, the thread hooking mechanism 400 and the thread cutting mechanism 500 are main motors, so that the cloth pricking and picking mechanism 200, the feeding mechanism 300 and the thread hooking mechanism 400 are in linkage relation during sewing; during thread cutting, the cloth-pricking and thread-taking-up mechanism 200, the feeding mechanism 300, the thread hooking mechanism 400 and the thread cutting mechanism 500 are in linkage relation, so that relative motion time sequences among the mechanisms are uniquely determined, a user cannot adjust the relative motion time sequences, and the sewing adaptability to different types of fabrics is poor.

2. The sewing machine uses a main motor as a main power source, and respectively transmits power to terminal execution components such as a needle bar and a take-up lever in a cloth pricking and taking-up mechanism 200, a cloth feeding tooth in a feeding mechanism 300, a rotating shuttle in a thread hooking mechanism 400 and a moving blade in a thread trimming mechanism 500 through a relatively complex transmission structure, and an independent thread trimming driving source 501 and a presser foot lifting driving source 601 are additionally arranged for matching action, so that additional functions such as thread trimming, presser foot lifting and the like are realized. Therefore, the whole structure of the sewing machine is complex, the transmission chain is long, and adverse effects such as vibration, noise and the like are easily caused; such as: the high-speed rotation of the two longer feed lifting connecting rods and the cloth feeding connecting rod in the feeding mechanism 300 causes larger noise and is extremely easy to wear; the overlong transmission chain can cause that the assembly precision of the moving part, the part machining precision requirement and the like can not be accurately ensured.

3. The structure of the shell is complex, and the requirement on manufacturing precision is high; the machine shell is divided into an upper section and a lower section, in order to realize that the power of the upper section is transmitted to the lower section and is transmitted from the right end of the machine shell to the left end of the machine shell, the feed lifting shaft and the feed shaft in the opposite feed mechanism 300, and the lower main shaft in the thread hooking mechanism 400 is communicated from the right end of the machine shell to the left end of the machine shell through the whole shaft, so that the requirements on the coaxiality, the concentricity and the precision of corresponding mounting holes in the machine shell are very high, and the machine shell needs to be applied to some special processing equipment and tool fixtures.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a modular sewing machine, in which each function mechanism in the sewing machine is modularized and has an independent driving source, thereby shortening a transmission chain and enabling selection and combination of each function and adjustment of relative movement timing.

In order to achieve the above object, the present invention provides a modular sewing machine including a feed dog mounted on a feed dog and a feed dog, the modular sewing machine further including:

a cloth pricking and thread picking module: the needle bar is mounted at the lower end of the needle bar, the take-up lever can swing up and down in a reciprocating manner, and the cloth-stabbing take-up driving source is connected with the needle bar and the take-up lever through the cloth-stabbing take-up transmission mechanism;

the tooth lifting and line hooking module: the thread lifting hook driving source is connected with the rotary shuttle and the thread lifting connecting part of the tooth rack through the thread lifting hook transmission mechanism;

a cloth feeding module: the feed mechanism comprises a feed driving source, a tooth frame seat connected with the other end of the tooth frame and a feed transmission mechanism, wherein the feed driving source is connected with the tooth frame seat through the feed transmission mechanism;

the cloth pricking and picking module, the tooth lifting and hooking module and the cloth feeding module are three mutually independent functional modules, and the cloth pricking and picking driving source, the tooth lifting and hooking driving source and the cloth feeding driving source are three mutually independent driving sources.

Furthermore, the modularized sewing machine further comprises an auxiliary function module independent of the cloth-stabbing thread-picking module, the tooth-lifting thread-hooking module and the cloth-feeding module, the auxiliary function module comprises an auxiliary driving source independent of the cloth-stabbing thread-picking driving source, the tooth-lifting thread-hooking driving source and the cloth-feeding driving source, a terminal execution part and an intermediate transmission mechanism, and the auxiliary driving source is connected with the terminal execution part through the intermediate transmission mechanism.

Further, the terminal actuating unit includes a thread trimming unit and a foot lifting unit, and the intermediate transmission mechanism includes a thread trimming transmission mechanism connected between the auxiliary driving source and the thread trimming unit and a foot lifting mechanism connected between the auxiliary driving source and the foot lifting unit.

The thread cutting mechanism comprises a thread cutting cam, a thread cutting roller, a first thread cutting crank shaft, a first thread cutting crank, a thread cutting slider, a second thread cutting crank shaft, a second thread cutting connecting rod and a movable cutter frame, wherein the thread cutting cam, the thread cutting roller, the first thread cutting crank shaft, the second thread cutting connecting rod and the movable cutter frame are driven by an auxiliary driving source to rotate, the first thread cutting crank shaft, the second thread cutting connecting rod and the movable cutter frame are rotatably supported in a sewing machine shell, the first thread cutting driving arm extends out of the first thread cutting crank shaft, the thread cutting roller is rotatably mounted on the first thread cutting driving arm and is in contact fit with the thread cutting cam, the second thread cutting driving arm extends out of the second thread cutting crank shaft, the thread cutting slider is hinged to the first thread cutting crank shaft and is in sliding fit with a thread cutting chute in the second thread cutting driving arm, two ends of the thread cutting connecting rod are respectively hinged to the second thread cutting crank and the movable cutter frame, and the movable cutter frame is fixed to the movable cutter frame.

The presser foot lifting mechanism comprises a presser foot lifting cam, a presser foot lifting roller, a presser foot lifting driving shaft, a presser foot lifting crank, a first pull rod, a right lever, a second pull rod, a left lever, a presser foot lifting plate, a pressure rod guide frame and a vertically extending pressure rod, wherein the presser foot lifting driving shaft is rotatably supported in a sewing machine shell, the presser foot lifting crank is fixed on the presser foot lifting driving shaft, the right lever is provided with a first fixed swing fulcrum, the left lever is provided with a second fixed swing fulcrum, the presser foot lifting plate is provided with a presser foot lifting driving arm, the presser foot lifting roller is rotatably arranged on the presser foot lifting driving arm and is in contact fit with the presser foot lifting cam, two ends of the first pull rod are respectively hinged with the presser foot lifting crank and the right lever, two ends of the second pull rod are respectively hinged with the right lever and the left lever, the left lever is hinged with the upper end of the presser foot lifting plate, the presser foot lifting plate is provided with a lifting hook part, the presser foot guide frame is provided with a connecting protrusion part clamped with the lifting phase, the pressure rod guide frame is fixed at the upper end of the presser foot, and the lower end of the presser rod of the presser foot.

Further, the auxiliary driving source is a motor.

Furthermore, the cloth pricking and thread picking transmission mechanism comprises an upper shaft driven to rotate by a cloth pricking and thread picking driving source, a needle rod crank fixed on the upper shaft, a cloth pricking and thread picking transmission shaft, a connecting rod mechanism and a crank slider mechanism, the cloth pricking and thread picking transmission shaft is provided with a first shaft part eccentric to the upper shaft and a second shaft part eccentric to the first shaft part, the first shaft part is fixed on the needle rod crank and is connected with the thread picking rod through the connecting rod mechanism, and the second shaft part is connected with the needle rod through the crank slider mechanism.

Further, the feed dog thread transmission mechanism includes a lower shaft and a feed dog shaft both rotatably supported in the sewing machine housing, a shaft transmission unit connected between the lower shaft and the feed dog shaft, and a feed dog transmission unit connected between the feed dog shaft and a feed dog connecting portion of the feed dog frame, the lower shaft or the feed dog shaft being transmission-connected to the feed dog thread driving source and driven to rotate by the feed dog thread driving source, the transmission unit making a rotation speed ratio of the lower shaft to the feed dog shaft 2, the rotary hook being fixed to an end portion of the lower shaft

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 includes a first gear fixed to the feed lifting shaft, and a second gear fixed to the lower shaft, and the first gear is engaged with the second gear.

Furthermore, the tooth lifting transmission unit comprises a first tooth lifting eccentric wheel fixed on the tooth lifting shaft and a first tooth lifting connecting rod, the first tooth lifting eccentric wheel is provided with a first tooth lifting eccentric shaft part eccentric to the tooth lifting shaft, one end of the first tooth lifting connecting rod 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 the tooth lifting 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 feed lifting transmission shaft parallel to the feed lifting shaft, a feed lifting swing rod fixed at one end of the feed lifting transmission shaft, a feed lifting crank fixed at the other end of the feed lifting transmission shaft, and a third feed lifting connecting rod, wherein 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 at 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 tooth frame.

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

Furthermore, the cloth feeding transmission mechanism comprises a cloth feeding crank and a cloth feeding connecting rod, wherein the cloth feeding crank is driven by a cloth feeding driving source to rotate, and two ends of the cloth feeding connecting rod are respectively hinged with the cloth feeding crank and the tooth frame seat.

Further, the cloth pricking and yarn taking-up driving source, the tooth lifting and hook yarn driving source and the cloth feeding driving source are all motors.

As described above, the modular sewing machine according to the present invention has the following advantageous effects:

this application is with the thorn cloth take-up mechanism in the sewing machine, the lifting tooth colludes line mechanism and work feed mechanism and all modularizes, every functional module all adopts independent driving source to drive, make thorn cloth take-up module, mutual independence, mutual noninterference between lifting tooth colludes line module and the work feed module, 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, noise, the difficult processing scheduling problem of casing, on the other hand can adjust the relative motion chronogenesis of each functional module, promote sewing adaptability greatly from this.

Drawings

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

Fig. 2 and 3 are schematic views of the modular sewing machine according to the embodiment of the present application, at different viewing angles.

FIG. 4 is a schematic structural diagram of a cloth-piercing thread-taking-up module in an embodiment of a modular sewing machine.

FIG. 5 is a schematic structural diagram of a feed lifting module in an embodiment of a modular sewing machine.

FIG. 6 is a schematic view of a cloth feeding module in a first embodiment of the modular sewing machine.

FIG. 7 is a schematic structural diagram of an auxiliary function module in the first embodiment of the modular sewing machine.

Fig. 8a to 8d are schematic diagrams of a feed path of a feed dog in a first embodiment of a modular sewing machine.

FIG. 9 is a schematic view of a modular sewing machine of the second embodiment of the present application, shown from a different perspective.

FIG. 10 is a schematic structural diagram of a feed-dog driving unit in a third embodiment of the modular sewing machine according to the present application.

Description of the element reference numerals

10. Tooth holder

20. Feed dog

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

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

32. Needle bar

33. Needle

34. Thread take-up lever

35. Upper shaft

36. Needle bar crank

37. Cloth-pricking and thread-taking-up transmission shaft

40. Tooth lifting thread hooking module

41. Tooth lifting and thread hooking driving source

42. Rotating shuttle

44. Lower shaft

45. Feed lifting shaft

47. First pulley

48. Second belt wheel

49. Transmission belt

410. First gear

411. Second gear

412. First feed lifting eccentric wheel

413. First tooth lifting connecting rod

414. Second eccentric cam of lifting tooth

415. Second tooth lifting connecting rod

416. Feed lifting transmission shaft

417. Swing rod for lifting tooth

418. Feed lifting rock shaft crank

419. Third feed lifting connecting rod

420. Feed lifting fork shaped crank

421. Feed lifting slider

50. Cloth feeding module

51. Cloth feeding driving source

52. Dental articulator holder

53. Cloth feeding crank

54. Cloth feeding connecting rod

60. Auxiliary function module

61. Thread trimming component

611. Stationary knife

612. Moving knife

62. Foot lifting and pressing part

621. Presser foot

63. Trimming transmission mechanism

631. Thread trimming cam

632. Thread trimming roller

633. First trimming crank shaft

634. First trimming crank

635. Thread trimming slide block

636. Second trimming crank axle

637. Second trimming crank

638. Trimming connecting rod

639. Movable knife rest

64. Presser foot lifting mechanism

641. Cam for lifting presser foot

642. Pressure foot lifting roller

643. Lift presser foot drive shaft

644. Crank for lifting presser foot

645. First pull rod

646. Right lever

647. Second pull rod

648. Left lever

649. Lift presser foot lifting plate

6410. Pressure bar guide frame

6411. Pressure lever

65. Auxiliary driving source

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 in the specification are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for descriptive purposes only and are not intended to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical change.

As shown in fig. 2 and 3, the present application provides a modular sewing machine including a thread guide 10, a feed dog 20 fixedly installed on the thread guide 10, a pick module 30, a pick module 40, and a feed module 50. For convenience of description, in the following embodiments, the length direction of the modular sewing machine is defined as the left-right direction, the width direction of the modular sewing machine is defined as the front-back direction, and the height direction of the modular sewing machine is defined as the up-down direction; meanwhile, the left direction is the direction towards the machine head of the modular sewing machine, the right direction is the direction towards the machine tail of the modular sewing machine, and the front direction is the moving direction of cloth when the modular sewing machine performs front sewing.

Embodiment one of the modular sewing machine

In the first embodiment of the modular sewing machine, as shown in fig. 4, the cloth-stabbing thread-taking-up module 30 includes a cloth-stabbing thread-taking-up driving source 31, a needle bar 32 which can reciprocate up and down, a needle 33 which is mounted on a lower end of the needle bar 32, a thread-taking-up lever 34 which can reciprocate up and down, and a cloth-stabbing thread-taking-up transmission mechanism, and the cloth-stabbing thread-taking-up driving source 31 is connected to the needle bar 32 and the thread-taking-up lever 34 through the cloth-stabbing thread-taking-up transmission mechanism to drive the needle bar 32 and the thread-taking-up lever 34 to move. As shown in fig. 5, the tooth lifting hook thread module 40 includes a tooth lifting hook thread driving source 41, a rotatable rotating shuttle 42, a tooth lifting connecting portion 101 disposed at a rear end of the dental articulator 10, and a tooth lifting hook thread transmission mechanism, wherein the tooth lifting hook thread driving source 41 is connected to the rotating shuttle 42 and the tooth lifting connecting portion 101 of the dental articulator 10 through the tooth lifting hook thread transmission mechanism to drive the rotating shuttle 42 and the tooth lifting connecting portion 101 to move. As shown in fig. 6, the cloth feeding module 50 includes a cloth feeding driving source 51, a dental articulator holder 52 connected to a front end of the dental articulator 10, and a cloth feeding transmission mechanism, and the cloth feeding driving source 51 is connected to the dental articulator holder 52 through the cloth feeding transmission mechanism to drive the dental articulator holder 52 to move. The pick-up module 30, the pick-up module 40 and the cloth feeding module 50 are three independent functional modules, and the pick-up driving source 31, the pick-up driving source 41 and the cloth feeding driving source 51 are three independent driving sources.

When the modular sewing machine operates, the cloth-stabbing and thread-picking drive source 31, the tooth-lifting and thread-hooking drive source 41 and the cloth-feeding drive source 51 all act, the cloth-stabbing and thread-picking drive source 31 drives the needle rod 32 to reciprocate up and down through the cloth-stabbing and thread-picking transmission mechanism, and the needle rod 32 drives the machine needle 33 to reciprocate up and down to execute cloth-stabbing action; the upper thread passes through the take-up lever 34, and the cloth pricking and take-up driving source 31 drives the take-up lever 34 to swing up and down in a reciprocating manner through the cloth pricking and take-up transmission mechanism to execute a take-up action; the tooth lifting and thread hooking driving source 41 drives the rotating shuttle 42 to rotate through the tooth lifting and thread hooking transmission mechanism to carry out thread hooking action; the tooth lifting hook wire driving source 41 drives the tooth lifting connecting part 101 to reciprocate up and down through the tooth lifting hook wire transmission mechanism, and the tooth lifting connecting part 101 drives the tooth frame 10 and the cloth feeding tooth 20 to reciprocate up and down together to perform tooth lifting action; the feed driving source 51 drives the tooth frame base 52 to move through the feed transmission mechanism, and the tooth frame base 52 drives the tooth frame 10 and the feed dog 20 to reciprocate back and forth together to perform a feed operation. Thus, the cloth-stabbing and thread-taking module 30, the tooth-lifting and thread-hooking module 40 and the cloth-feeding module 50 cooperate to complete sewing. Particularly, the bur cloth taking-up module 30, the lifting tooth hooking module 40 and the cloth feeding module 50 are functional modules of the sewing machine, the bur cloth taking-up module 30, the lifting tooth hooking module 40 and the cloth feeding module 50 in the present application are modularized, each functional module is driven by an independent driving source, so that the bur cloth taking-up module 30, the lifting tooth hooking module 40 and the cloth feeding module 50 are independent and do not interfere with each other, a transmission structure between the upper shaft 35 and other functional modules in the original sewing machine is cancelled, on one hand, a transmission chain of each functional module is shortened, the problems of vibration, noise and the like caused by overlong transmission chain are avoided, on the other hand, the relative motion time sequence and motion rule of each functional module can be adjusted, for example, the morning and evening of the thread hooking time of the rotary shuttle 42 relative to the machine needle 33 and the motion track of the cloth feeding tooth 20 can be adjusted, and therefore, the sewing adaptability is greatly improved.

Further, as shown in fig. 2 and 3, the modular sewing machine further includes an auxiliary function module 60, the auxiliary function module 60 is independent from the cloth-stabbing and thread-picking module 30, the tooth-lifting and thread-hooking module 40 and the cloth-feeding module 50, that is, the auxiliary function module 60 is independent from and does not interfere with the cloth-stabbing and thread-picking module 30, the tooth-lifting and thread-hooking module 40 and the cloth-feeding module 50, the function of the auxiliary function module 60 is independent from the cloth-stabbing and thread-picking module 30, the tooth-lifting and thread-hooking module 40 and the cloth-feeding module 50, and the auxiliary function module 60 can implement various predetermined sewing execution actions, such as presser foot lifting, thread cutting, presser foot 621 pressure adjustment, thread loosening and the like. Therefore, the auxiliary function module 60 includes an auxiliary drive source 65 independent of the pick-up drive source 31, the pick-up drive source 41, and the feed drive source 51, an end actuator, and an intermediate transmission mechanism, and the auxiliary drive source 65 is connected to the end actuator through the intermediate transmission mechanism. In this embodiment, the auxiliary function module 60 is used to perform a presser foot lifting action and a thread trimming action; based on this, as shown in fig. 3 and 7, the terminal actuating member includes a thread trimming member 61 and a presser foot lifting member 62, and the intermediate transmission mechanism includes a thread trimming transmission mechanism 63 connected between an auxiliary driving source 65 and the thread trimming member 61, and a presser foot lifting mechanism 64 connected between the auxiliary driving source 65 and the presser foot lifting member 62.

Preferably, the auxiliary driving source 65 is a motor, and the motor constituting the auxiliary driving source 65 is a biaxial motor.

Further, as shown in fig. 7, the thread cutting assembly 61 includes a fixed cutter 611 fixed in position and a rotatable movable cutter 612, the thread cutting transmission mechanism 63 includes a thread cutting cam 631 fixed on a motor shaft on the left side of the auxiliary driving source 65, a thread cutting roller 632, a first thread cutting crank 633 rotatably supported in the sewing machine housing and extending left and right, a first thread cutting crank 634 fixed on the left end of the first thread cutting crank 633, a thread cutting slider 635, a second thread cutting crank 636 rotatably supported in the sewing machine housing and extending left and right, a second thread cutting crank 637 fixed on the left end of the second thread cutting crank 636, a thread cutting connecting rod 638 and a movable cutter holder 639, the first thread cutting driving arm is integrally extended from the right end of the first thread cutting crank 633, the thread cutting roller 632 is rotatably mounted on the first thread cutting driving arm and is in contact fit with the thread cutting cam, the second thread cutting crank 637 is integrally extended from the right end of the second thread cutting crank 636, the thread cutting slide driving arm 635 is hinged to the first thread cutting crank driving arm and is in slide fit with the thread cutting crank 631 extending left and right and the movable cutter holder 639. In addition, the contour surface of the trimming cam 631 in contact with and engaged with the trimming roller 632 includes a first reducing driving section and a first avoiding section, and the first avoiding section may be an equal diameter surface.

Further, as shown in fig. 7, the presser foot lifting member 62 includes a presser foot 621 capable of moving up and down, the presser foot lifting mechanism 64 includes a presser foot lifting cam 641 fixed on a motor shaft on the right side of the auxiliary drive source 65, a presser foot lifting roller 642, a presser foot lifting drive shaft 643 rotatably supported in the sewing machine housing and extending left and right, a presser foot lifting crank 644 fixed on the right end of the presser foot lifting drive shaft 643, a first pull rod 645 extending up and down, a right lever 646 having a first fixed swing fulcrum, a second pull rod 647 extending left and right, a left lever 648 having a second fixed swing fulcrum, a presser foot lifting plate 649, a presser bar guide 6410, and a presser bar 6411 extending up and down, a presser foot lifting drive arm 643 is integrally extended from the left end of the presser foot lifting drive shaft 643, the presser foot roller 642 is rotatably mounted on the presser foot lifting drive arm and in contact with the presser foot lifting cam 621, both ends of the first pull rod are respectively hinged with the presser foot lifting crank 644 and the right lever 6411, both ends of the second pull rod 647 are respectively hinged with the right lever crank 646 and the left lever 6410, the presser foot lifting guide 6411 is mounted on the presser foot lift lever, the presser foot lift lever guide 6410, the upper end of the presser foot is mounted on the presser foot lift lever 6411, and the presser bar is connected with the presser bar 6411, and the presser bar guide 6410, and the presser bar is mounted on the presser bar guide 6411, and the presser bar 6411, the presser bar is mounted on the presser foot lifting bar. In addition, the profile surface of the presser foot lifting cam 641, which is in contact fit with the presser foot lifting roller 642, includes a second reducing driving section and a second avoiding section, and the second avoiding section may be a groove.

When the auxiliary function module 60 executes the thread trimming action, the auxiliary driving source 65 acts to drive the thread trimming cam 631 and the presser foot lifting cam 641 to rotate together; the first reducing driving section on the trimming cam 631 is in contact fit with the trimming roller 632 to push the first trimming crank shaft 633 to swing, and then push the second trimming crank shaft 636 to swing through the first trimming crank 634 and the trimming slider 635, and then drive the movable knife holder 639 and the movable knife 612 to rotate through the second trimming crank 637 and the trimming connecting rod 638, so that the movable knife 612 rotates in a direction close to the fixed knife 611, and the movable knife 612 engages with the fixed knife 611 to cut a suture, thereby performing a trimming operation; in this process, the second avoiding section on the presser foot lifting cam 641 is matched with the presser foot lifting roller 642, so that the presser foot lifting driving shaft 643 is not pushed to swing, and the presser foot 621 is not lifted upwards, thereby avoiding interference on the presser foot lifting mechanism 64.

When the auxiliary function module 60 executes the presser foot lifting action, the auxiliary driving source 65 acts to drive the trimming cam 631 and the presser foot lifting cam 641 to rotate together; the second reducing driving section on the presser foot lifting cam 641 is in contact fit with the presser foot lifting roller 642 to push the presser foot lifting driving shaft 643 to swing, so that the right lever 646 is driven to rotate around a first fixed swing fulcrum through the presser foot lifting crank 644 and the first pull rod 645, the left lever 648 is driven to rotate around a second fixed swing fulcrum through the right lever 646 and the second pull rod 647, the presser foot lifting plate 649 is pulled upwards, the press rod guide frame 6410, the press rod 6411 and the presser foot 621 are driven to move upwards, and therefore the presser foot lifting action is executed; in this process, the first avoiding section of the trimming cam 631 cooperates with the trimming roller 632, and the first trimming crank shaft 633 is not pushed to swing, so the movable knife 612 does not rotate, and the interference to the trimming transmission mechanism 63 is avoided.

Further, the cloth-pricking and thread-taking-up driving source 31 is a motor; as shown in fig. 4, the pick-up transmission mechanism includes an upper shaft 35 driven to rotate by the pick-up driving source 31, a needle bar crank 36 fixed to the left end of the upper shaft 35, a pick-up transmission shaft 37, a link mechanism, and a crank slider mechanism, the upper shaft 35 extends left and right, the right end of the upper shaft 35 is connected to the motor shaft of the pick-up driving source 31 through a coupling, the pick-up transmission shaft 37 has a first shaft portion eccentric to the upper shaft 35 and a second shaft portion eccentric to the first shaft portion, the second shaft portion is also eccentric to the upper shaft 35, the first shaft portion is fixed to the needle bar crank 36 and connected to the pick-up lever 34 through the link mechanism, and the second shaft portion is connected to the needle bar 32 through the crank slider mechanism. The upper shaft 35 is driven by the needle bar picking drive source 31 to rotate, the upper shaft 35 drives the needle bar crank 36 and the needle bar picking transmission shaft 37 to rotate together around the central axis of the upper shaft 35, the needle bar picking transmission shaft 37 drives the thread picking rod 34 to swing up and down in a reciprocating manner through the link mechanism to perform a picking action, the needle bar 32 is driven by the needle bar picking transmission shaft 37 to move up and down in a reciprocating manner through the crank-slider mechanism, and the needle bar 32 drives the machine needle 33 to move up and down in a reciprocating manner to perform a needle bar puncturing action. The structure of the crank slider mechanism can be seen in the sewing machine disclosed in the Chinese invention patent application with the application number of 202010307710.4.

Further, the tooth lifting and thread hooking driving source 41 is a motor; as shown in fig. 5, the feed dog thread transmission mechanism includes a lower shaft 44 and a feed dog shaft 45 both rotatably supported in the sewing machine housing, a shaft transmission unit connected between the lower shaft 44 and the feed dog shaft 45, and a feed dog transmission unit connected between the feed dog shaft 45 and a feed dog connecting portion 101 of the feed dog frame 10, the lower shaft 44 and the feed dog shaft 45 both extending left and right, the shaft transmission unit making a rotation speed ratio of the lower shaft 44 to the feed dog shaft 45 to be 2, and a rotary hook 42 fixed to a left end of the lower shaft 44. Preferably, a motor shaft of the feed lifting tooth hooking driving source 41 is connected with the right end of the feed lifting tooth shaft 45 through a coupler to directly drive the feed lifting tooth shaft 45 to rotate; the shaft transmission unit includes a first pulley 47 fixed to the lower shaft 44, a second pulley 48 fixed to the feed lifting shaft 45, and a transmission belt 49 connecting the first pulley 47 and the second pulley 48. The feed dog transmission unit includes a first feed dog eccentric 412 fixed to the left end of the feed dog shaft 45, and a first feed dog connecting rod 413, the first feed dog eccentric 412 has a first feed dog eccentric shaft portion eccentric to the feed dog shaft 45, one end of the first feed dog connecting rod 413 is rotatably mounted to the first feed dog eccentric shaft portion, and the other end is hinged to the feed dog connecting portion 101 of the dental articulator 10. When the feed lifting tooth thread hooking driving source 41 rotates, the feed lifting tooth shaft 45 is driven to rotate, and the feed lifting tooth shaft 45 drives the tooth frame 10 and the feed delivery tooth 20 to reciprocate up and down through the first feed lifting tooth eccentric wheel 412 and the first feed lifting tooth connecting rod 413 so as to perform feed lifting tooth action; meanwhile, the feed lifting shaft 45 drives the lower shaft 44 to rotate circumferentially around the central axis thereof through the shaft transmission unit, and the lower shaft 44 drives the rotating shuttle 42 to rotate so as to perform thread hooking action.

Further, the cloth feeding driving source 51 is a motor; as shown in fig. 6, the cloth feeding transmission mechanism includes a cloth feeding crank 53 having one end fixed to the motor shaft of the cloth feeding driving source 51, and a cloth feeding link 54, and both ends of the cloth feeding link 54 are respectively hinged to the other end of the cloth feeding crank 53 and the dental articulator holder 52. When the cloth feeding driving source 51 rotates, the cloth feeding crank 53 is driven to rotate, and the feed dog 10 and the feed dog 20 are driven to reciprocate back and forth by the cloth feeding link 54 and the feed dog seat 52, thereby performing a cloth feeding operation.

In the modular sewing machine, the thread hooking time of the rotary hook 42 relative to the needle 33 can be adjusted by adjusting the relative timing of the feed lifting hook driving source 41 and the stab-in and take-up driving source 31, so that the thread hooking time is earlier when sewing a thin material and later when sewing a thick material. The feed dog 20 performs a combined motion of up-down reciprocating movement and back-and-forth reciprocating movement, and the output rule of the feed driving source 51 relative to the feed lifting hook line driving source 41 is adjusted, so that the feed trajectory of the feed dog 20 can be changed, for example, an elliptical feed trajectory as shown in fig. 8a, a front triangular feed trajectory as shown in fig. 8b, a rear triangular feed trajectory as shown in fig. 8c, or a rectangular feed trajectory as shown in fig. 8d can be realized, wherein the elliptical feed trajectory and the front triangular feed trajectory are suitable for sewing thin materials and medium-thick materials, and the rear triangular feed trajectory and the rectangular feed trajectory are suitable for sewing thick materials.

Embodiment two of the modularized sewing machine

The second embodiment of the modular sewing machine is different from the first embodiment of the modular sewing machine only in that: the structure of the middle shaft transmission unit and the tooth lifting transmission unit of the tooth lifting thread hooking transmission mechanism are different. Specifically, in the second embodiment of the modular sewing machine, as shown in fig. 9, the shaft transmission unit includes a first gear 410 fixed on the feed lifting shaft 45 and a second gear 411 fixed on the lower shaft 44, the first gear 410 is engaged with the second gear 411, the right end of the feed lifting shaft 45 is fixedly connected to the motor shaft of the feed lifting hook driving source 41 through a coupling, and the feed lifting shaft 45 is directly driven to rotate by the feed lifting hook driving source 41. The feed dog transmission unit comprises a second feed dog eccentric wheel 414 fixed on the feed dog shaft 45, a second feed dog connecting rod 415, a feed dog transmission shaft 416 parallel to the feed dog shaft 45, a feed dog swing rod 417 fixed at one end of the feed dog transmission shaft 416, a feed dog crank 418 fixed at the other end of the feed dog transmission shaft 416, and a third feed dog connecting rod 419, wherein the second feed dog eccentric wheel 414 is provided with a second feed dog eccentric shaft part eccentric to the feed dog shaft 45, one end of the second feed dog connecting rod 415 is rotatably arranged on 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 417, and two ends of the third feed dog connecting rod 419 are respectively hinged with the feed dog crank 418 and the feed dog connecting part 101 of the tooth frame 10.

Modular sewing machine embodiment III

The third embodiment of the modular sewing machine is different from the second embodiment of the modular sewing machine only in that: the structures of the tooth lifting transmission units in the tooth lifting hook line transmission mechanism are different, and mainly the connection structures between the tooth lifting transmission shaft 416 and the tooth lifting connection part 101 of the tooth rack 10 are different. Specifically, in the third embodiment of the modular sewing machine, as shown in fig. 9 and 10, the lift tooth transmission unit includes a second lift tooth eccentric wheel 414 fixed to the lift tooth shaft 45, a second lift tooth connecting rod 415, a lift tooth transmission shaft 416 parallel to the lift tooth shaft 45, a lift tooth swing rod 417 fixed to one end of the lift tooth transmission shaft 416, a lift tooth fork shaped crank 420 fixed to the other end of the lift tooth transmission shaft 416, and a lift tooth slider 421, the second lift tooth eccentric wheel 414 has a second lift tooth eccentric shaft portion eccentric to the lift tooth shaft 45, one end of the second lift tooth connecting rod 415 is rotatably mounted to the second lift tooth eccentric shaft portion, the other end is hinged to the lift tooth swing rod 417, a lift tooth sliding slot slidably fitted to the lift tooth slider 421 is formed in the lift tooth fork shaped crank 420, and the lift tooth slider 421 is hinged to the lift tooth connecting portion 101 of the handle 10.

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 may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A modular sewing machine comprising a feed dog (20) mounted on a feed dog (10) and a feed dog (10), characterized in that: the modular sewing machine further comprises:

a cloth-pricking and thread-taking-up module (30): the needle bar comprises a cloth pricking and thread taking-up driving source (31), a needle bar (32) capable of moving up and down in a reciprocating manner, a machine needle (33) arranged at the lower end of the needle bar (32), a thread taking-up rod (34) capable of swinging up and down in a reciprocating manner, and a cloth pricking and thread taking-up transmission mechanism, wherein the cloth pricking and thread taking-up driving source (31) is connected with the needle bar (32) and the thread taking-up rod (34) through the cloth pricking and thread taking-up transmission mechanism;

a tooth lifting and hooking module (40): the tooth lifting hook wire driving device comprises a tooth lifting hook wire driving source (41), a rotatable rotating shuttle (42), a tooth lifting connecting part (101) arranged at one end of a tooth rack (10) and a tooth lifting hook wire transmission mechanism, wherein the tooth lifting hook wire driving source (41) is connected with the rotating shuttle (42) and the tooth lifting connecting part (101) of the tooth rack (10) through the tooth lifting hook wire transmission mechanism;

cloth feed module (50): the feed mechanism comprises a feed driving source (51), a tooth frame seat (52) connected with the other end of the tooth frame (10) and a feed transmission mechanism, wherein the feed driving source (51) is connected with the tooth frame seat (52) through the feed transmission mechanism;

the cloth pricking and picking module (30), the tooth lifting and hooking module (40) and the cloth feeding module (50) are three mutually independent functional modules, and the cloth pricking and picking drive source (31), the tooth lifting and hooking drive source (41) and the cloth feeding drive source (51) are three mutually independent drive sources.

2. The modular sewing machine of claim 1, wherein: the cloth lifting and taking-up device is characterized by further comprising an auxiliary function module (60) independent of the cloth lifting and taking-up module (30), the tooth lifting and hooking module (40) and the cloth feeding module (50), wherein the auxiliary function module (60) comprises an auxiliary driving source (65) independent of the cloth lifting and taking-up driving source (31), the tooth lifting and hooking driving source (41) and the cloth feeding driving source (51), a terminal execution part and an intermediate transmission mechanism, and the auxiliary driving source (65) is connected with the terminal execution part through the intermediate transmission mechanism.

3. The modular sewing machine of claim 2, wherein: the terminal actuating component comprises a thread cutting component (61) and a foot lifting component (62), and the intermediate transmission mechanism comprises a thread cutting transmission mechanism (63) connected between an auxiliary driving source (65) and the thread cutting component (61) and a foot lifting mechanism (64) connected between the auxiliary driving source (65) and the foot lifting component (62).

4. The modular sewing machine of claim 3, wherein: the thread cutting component (61) comprises a fixed cutter (611) with a fixed position and a rotatable movable cutter (612), the thread cutting transmission mechanism (63) comprises a thread cutting cam (631) driven to rotate by an auxiliary drive source (65), a thread cutting roller (632), a first thread cutting crank shaft (633) rotatably supported in a sewing machine shell, a first thread cutting crank (634) fixed on the first thread cutting crank shaft (633), a thread cutting slider (635), a second thread cutting crank shaft (636) rotatably supported in the sewing machine shell, a second thread cutting crank (637) fixed on the second thread cutting crank shaft (636), a thread cutting connecting rod (638) and a movable cutter frame (639), a first thread cutting driving arm extends out of the first thread cutting crank shaft (633), the thread cutting roller (632) is rotatably mounted on the first thread cutting crank shaft and is in contact fit with the thread cutting cam (631), a second thread cutting driving arm extends out of the second thread cutting crank shaft (636), the thread cutting slider (635) is hinged with the first thread cutting crank shaft (634), the second thread cutting crank shaft (637) and the movable cutter (639) and is hinged with the movable cutter frame (639).

5. The modular sewing machine of claim 3, wherein: the presser foot lifting component (62) comprises a presser foot (621) capable of moving up and down, the presser foot lifting mechanism (64) comprises a presser foot lifting cam (641) driven by an auxiliary drive source (65) to rotate, a presser foot lifting roller (642), a presser foot lifting drive shaft (643) rotatably supported in a sewing machine shell, a presser foot lifting crank (644) fixed on the presser foot lifting drive shaft (643), a first pull rod (645), a right lever (646) with a first fixed swing fulcrum, a second pull rod (647), a left lever (648) with a second fixed swing fulcrum, a presser foot lifting plate (649), a press rod guide frame (6410) and a press rod (6411) extending up and down, a presser foot lifting drive arm extends out of the presser foot lifting drive shaft (643), the presser foot lifting roller (642) is rotatably mounted on the presser foot lifting drive arm and is in contact fit with the presser foot lifting cam (641), two ends of the first pull rod (645) are respectively hinged with the presser foot lifting crank (644) and the right lever (646) and the presser foot lifting lever guide frame (6411), two ends of the second pull rod (647) are respectively fixed with the left lever (648) and the left lever guide frame (6410), a hook part of the presser foot lifting rod (6411) is fixed on the presser foot lifting lever (6410), and a hook part of the presser foot lifting rod (6411) is fixed with the presser foot lifting lever (6410) respectively, the presser foot (621) is mounted at the lower end of the pressure lever (6411).

6. The modular sewing machine of claim 2, wherein: the auxiliary driving source (65) is a motor.

7. The modular sewing machine of claim 1, wherein: the cloth pricking and thread picking transmission mechanism comprises an upper shaft (35) driven to rotate by a cloth pricking and thread picking driving source (31), a needle rod crank (36) fixed on the upper shaft (35), a cloth pricking and thread picking transmission shaft (37), a connecting rod mechanism and a crank slider mechanism, wherein the cloth pricking and thread picking transmission shaft (37) is provided with a first shaft part eccentric to the upper shaft (35) and a second shaft part eccentric to the first shaft part, the first shaft part is fixed on the needle rod crank (36) and is connected with a thread picking rod (34) through the connecting rod mechanism, and the second shaft part is connected with the needle rod (32) through the crank slider mechanism.

8. The modular sewing machine of claim 1, wherein: the feed lifting hook line transmission mechanism comprises a lower shaft (44) and a feed lifting shaft (45) which are rotatably supported in a sewing machine shell, a shaft transmission unit connected between the lower shaft (44) and the feed lifting shaft (45), and a feed lifting transmission unit connected between the feed lifting shaft (45) and a feed lifting connection part (101) of a feed lifting frame (10), wherein the lower shaft (44) or the feed lifting shaft (45) is in transmission connection with a feed lifting hook line driving source (41) and is driven to rotate by the feed lifting hook line driving source (41), the shaft transmission unit enables the rotating speed ratio of the lower shaft (44) to the feed lifting hook line driving source (45) to be 2, and a rotating shuttle (42) is fixed at the end part of the lower shaft (44).

9. The modular sewing machine of claim 8, wherein: the shaft transmission unit comprises a first belt wheel (47) fixed on the lower shaft (44), a second belt wheel (48) fixed on the feed lifting shaft (45), and a transmission belt (49) connecting the first belt wheel (47) and the second belt wheel (48).

10. The modular sewing machine of claim 8, wherein: the shaft transmission unit comprises a first gear (410) fixed on the feed lifting shaft (45) and a second gear (411) fixed on the lower shaft (44), and the first gear (410) is meshed with the second gear (411).

11. The modular sewing machine of claim 8, wherein: the tooth lifting transmission unit comprises a first tooth lifting eccentric wheel (412) fixed on a tooth lifting shaft (45) and a first tooth lifting connecting rod (413), the first tooth lifting eccentric wheel (412) is provided with a first tooth lifting eccentric shaft part eccentric to the tooth lifting shaft (45), one end of the first tooth lifting connecting rod (413) 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).

12. The modular sewing machine of claim 8, wherein: the tooth lifting transmission unit comprises a second tooth lifting eccentric wheel (414) fixed on a tooth lifting shaft (45), a second tooth lifting connecting rod (415), a tooth lifting transmission shaft (416) parallel to the tooth lifting shaft (45), a tooth lifting swing rod (417) fixed at one end of the tooth lifting transmission shaft (416), a tooth lifting crank (418) fixed at the other end of the tooth lifting transmission shaft (416) and a third tooth lifting connecting rod (419), wherein the second tooth lifting eccentric wheel (414) is provided with a second tooth lifting eccentric shaft part eccentric to the tooth lifting shaft (45), one end of the second tooth lifting connecting rod (415) is rotatably arranged on the second tooth lifting eccentric shaft part, the other end of the second tooth lifting eccentric shaft part is hinged with the tooth lifting swing rod (417), and the two ends of the third tooth lifting connecting rod (419) are respectively hinged with the tooth lifting crank (418) and a tooth lifting connecting part (101) of the tooth frame (10).

13. The modular sewing machine of claim 8, wherein: the tooth lifting transmission unit comprises a second tooth lifting eccentric wheel (414) fixed on a tooth lifting shaft (45), a second tooth lifting connecting rod (415), a tooth lifting transmission shaft (416) parallel to the tooth lifting shaft (45), a tooth lifting swing rod (417) fixed at one end of the tooth lifting transmission shaft (416), a tooth lifting fork-shaped crank (420) fixed at the other end of the tooth lifting transmission shaft (416) and a tooth lifting sliding block (421), the second tooth lifting eccentric wheel (414) is provided with a second tooth lifting eccentric shaft part eccentric to the tooth lifting shaft (45), one end of the second tooth lifting connecting rod (415) is rotatably arranged on the second tooth lifting eccentric shaft part, the other end of the second tooth lifting eccentric shaft part is hinged with the tooth lifting swing rod (417), a tooth lifting sliding groove in sliding fit with the tooth lifting sliding block (421) is formed in the tooth lifting fork-shaped crank (420), and the tooth lifting sliding block (421) is hinged with a tooth lifting connecting part (101) of the tooth lifting rack (10).

14. The modular sewing machine of claim 1, wherein: the cloth feeding transmission mechanism comprises a cloth feeding crank (53) driven by a cloth feeding driving source (51) to rotate and a cloth feeding connecting rod (54), wherein two ends of the cloth feeding connecting rod (54) are respectively hinged with the cloth feeding crank (53) and the tooth frame seat (52).

15. The modular sewing machine of claim 1, wherein: the cloth pricking and taking-up driving source (31), the tooth lifting and hooking driving source (41) and the cloth feeding driving source (51) are all motors.