WO2022206003A1 - Flexibly adjustable feeding and thread hooking mechanism and sewing machine - Google Patents

Abstract

The present invention provides a flexibly adjustable feeding and thread hooking mechanism and a sewing machine. The flexibly adjustable feeding and thread hooking mechanism comprises a feed dog rack, feed dogs, and a teeth rising and thread hooking module; the teeth rising and thread hooking module comprises a teeth rising and thread hooking driving source, a rotatable rotary hook, a teeth rising connection portion provided at one end of the feed dog rack, and a teeth rising and thread hooking transmission mechanism; the teeth rising and thread hooking driving source is connected to the rotary hook and the teeth rising connection portion of the feed dog rack by means of the teeth rising and thread hooking transmission mechanism; and the teeth rising and thread hooking driving source is independent of a driving source in the sewing machine for driving the operation of a needle. In the present application, a teeth rising function and a thread hooking function of the sewing machine are integrated into an independent function module; and the independent teeth rising and thread hooking driving source is used to drive thread hooking and teeth rising, such that the relative timing between the teeth rising and thread hooking driving source and the driving source in the sewing machine for driving the operation of the needle can be adjusted, thereby adjusting the matching timing between the rotary hook and the needle, and the matching timing between an up-and-down reciprocating motion of the feed dogs and the needle, and greatly improving the sewing adaptability of the sewing machine.

Description

A flexibly adjustable feeding thread hooking mechanism and sewing machine technical field

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

The present invention also relates to a sewing machine comprising the above-mentioned flexible and adjustable feeding thread hooking mechanism.

Background technique

At present, the structure of the sewing machine in the prior art is shown in FIG. 1 , which mainly includes a main motor 100, a main shaft 200 driven and rotated by the main motor 100, a thread take-up mechanism 300, a feeding mechanism 400, and a thread hooking mechanism 500. The power of the thread take-up mechanism 300 , the feeding mechanism 400 and the thread hooking mechanism 500 comes from the main shaft 200 . When the sewing machine is running, the main motor 100 drives the main shaft 200 to rotate in the circumferential direction, and the main shaft 200 transmits power to the needle 301 in the piercing and thread take-up mechanism 300, the feeding dog 401 in the feeding mechanism 400, and the hook through each transmission mechanism respectively. The rotary hook 501 in the thread mechanism 500 makes the needle 301 reciprocate up and down, perform the action of piercing the cloth, and make the feed dog 401 perform the compound movement of the up and down reciprocating movement and the back and forth reciprocating movement, and execute the cloth feeding action, so that the rotary hook 501 can Circumferential slewing motion and thread hooking action. Therefore, the existing sewing machine uses the main motor 100 as the main power source, and transmits the power to the terminal execution components such as the needle 301, the feed dog 401 and the hook 501 through a relatively complex transmission structure. However, this structural form The sewing machine has the following defects: 1. The matching timing of the needle and the hook cannot be adjusted; 2. The distance of the single movement of the feeding dog cannot be adjusted; 3. The machining accuracy of the parts is high. Therefore, it is difficult for existing sewing machines to adapt to more and more complicated sewing conditions.

SUMMARY OF THE INVENTION

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a flexibly adjustable feeding thread hooking mechanism, which can improve sewing adaptability.

In order to achieve the above-mentioned purpose, the present invention provides a flexibly adjustable feeding thread hooking mechanism, including a tooth frame, a feeding dog installed on the tooth frame, a tooth-lifting wire-hook structure, and a feeder that is independent from the tooth-lifting wire-hook structure. Cloth structure, the thread-lifting and thread-lifting structure is provided with a thread-lifting drive source, the cloth-feeding structure is provided with a drive source for adjusting the needle distance, and a linkage is provided between the cloth-feeding structure and the thread-lifting structure structure, the linkage structure includes a second cloth feeding pendulum for changing the movement range of the cloth feeding structure, and the driving source for raising the thread and hooking the thread is independent of the driving source for driving the needle in the sewing machine.

Further, the linkage structure includes a cloth feed rod on which a first cloth feed crank is fixed, and the tooth-lifting structure includes a tooth-lifting rod, which is connected with a first cloth-feeding connecting rod. , one end of the first cloth feed crank is rotatably connected with the tooth lifting rod, and the other end is rotatably connected with the first cloth feed link. The eccentric wheel is mounted on the tooth lifting rod.

Further, the thread-lifting and hooking mechanism also includes a cloth feeding swing seat and a first cloth feeding swing rod, one end of the first cloth feeding swing rod is rotatably connected with the second cloth feeding swing rod, and the other end is connected with the cloth feeding swing seat. , the stitch length adjustment driving source controls the rotation of the swing seat; the design of the swing seat can make the force exerted by the stitch length adjustment drive source on the swing of the second cloth feeding swing rod in the best direction.

Further, the tooth rack is provided with a cloth feeding connection part connected with the cloth feeding structure, and a tooth lifting connection part connected with the tooth lifting structure, the cloth feeding structure also includes a tooth rack seat, and the cloth feeding shaft rotates. When driving the tooth frame to swing.

Further, the tooth-lifting wire hooking structure includes a tooth-lifting structure and a wire-hooking structure, and the tooth-lifting and wire-hook driving source drives the tooth-lifting structure and the wire hooking structure through a shaft transmission unit.

Further, the shaft transmission unit includes a first gear fixed on the lifting shaft, an intermediate shaft rotatably supported in the sewing machine casing, a second gear fixed on the intermediate shaft, and a first gear fixed on the lower shaft. Three gears, one of the tooth-lifting shaft, the lower shaft and the intermediate shaft is drivingly connected with the driving source of the wire-lifting hook, and is driven to rotate by the driving source of the wire-lifting hook, the first gear is meshed with the second gear , the second gear meshes with the third gear.

Further, the shaft transmission unit includes a first gear fixed on the lifting shaft, an intermediate shaft rotatably supported in the sewing machine casing, a second gear fixed on the intermediate shaft, and a first gear fixed on the lower shaft. Three gears, one of the tooth-lifting shaft, the lower shaft and the intermediate shaft is drivingly connected with the driving source of the wire-lifting hook, and is driven to rotate by the driving source of the wire-lifting hook, the first gear is meshed with the second gear , the second gear meshes with the third gear.

The present application also provides a sewing machine, which is equipped with the above-mentioned thread-lifting mechanism.

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

In this application, the thread raising function and thread hooking function of the sewing machine are integrated into an independent functional module, and an independent thread raising and threading driving source is used to drive the thread hooking and thread raising, so as to realize the connection between the thread raising and threading driving source and the sewing machine. The relative timing of the driving source that drives the needle can be adjusted, so that the matching timing between the hook and the needle, as well as the up and down reciprocating motion of the feed dog and the matching timing of the needle can be adjusted, so that the movement track of the feed dog can be adjusted. In addition, through the second cloth feeding pendulum, the linkage relationship between the thread lifting hook structure and the cloth feeding structure can be adjusted, so that the distance of the single feeding movement of the cloth feeding dog can be adjusted, so as to adjust the needle distance. Greatly improve the sewing adaptability of the sewing machine.

Description of drawings

FIG. 1 is a schematic structural diagram of a sewing machine in the prior art.

FIG. 2 is a schematic structural diagram of Embodiment 1 of the flexibly adjustable feeding wire hooking mechanism in the present application.

FIG. 3 is a schematic structural diagram of the tooth-lifting thread-hook module in FIG. 2 .

FIG. 4 is a schematic structural diagram of the shaft transmission unit in FIG. 2 .

FIG. 5 is a schematic structural diagram of Embodiment 2 of the flexibly adjustable feeding wire hooking mechanism in the present application.

FIG. 6 is a schematic structural diagram of Embodiment 3 of the flexibly adjustable feeding wire hooking mechanism in the present application.

FIG. 7 is a schematic structural diagram of Embodiment 4 of the flexibly adjustable feeding wire hooking mechanism in the present application.

FIG. 8 is a schematic structural diagram of the tooth-lifting transmission unit in FIG. 7 .

FIG. 9 is a schematic structural diagram of the shaft transmission unit in FIG. 7 .

FIG. 10 is a schematic structural diagram of a modular sewing machine equipped with a first embodiment of a tooth-lifting and thread-hook mechanism in the application.

Component label description

10 tooth frame 101 tooth lift 102 Feed connection 20 feed teeth 30 Tooth lift hook module 31 Thread lift drive source 32 hook 33 tooth lift 34 lower shaft 350 1st tooth lift eccentric 351 The first tooth lift link 352 Second tooth lift eccentric 353 Second tooth lift link 354 transmission shaft 355 tooth lift 356 Tooth lift crank 357 Third tooth lift link 358 Tooth lift fork crank 359 Tooth lifter 363 first gear 364 Intermediate shaft 365 second gear 366 third gear 370 feed shaft 371 Feeding eccentric 372 first feed link 373 Feeding swing seat 374 1st cloth feed lever 375 Second cloth feed lever 376 1st feed crank 40 Feeding module

42 bracket 50 Needle distance adjustment module 51 Stitch adjustment drive source 60 Barbed wire take-up module 61 Barbed wire take-up drive source 62 Needle bar 63 Needle

Detailed ways

The embodiments of the present invention are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

It should be noted that the structures, proportions, sizes, etc. drawn in the accompanying drawings of this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the conditions that the present invention can be implemented. Therefore, without technical substantive significance, any modification of structure, change of proportional relationship or adjustment of size should still fall within the scope disclosed in the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. within the scope of technical content. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the present invention. The practicable scope and the change or adjustment of the relative relationship thereof shall also be regarded as the practicable scope of the present invention without substantially changing the technical content.

The present application provides a sewing machine, in particular, the sewing machine is a modular sewing machine, which has a flexibly adjustable feeding thread hooking mechanism as mentioned below. For the convenience of description, the moving direction of the sewing material when the modular sewing machine is sewing is defined as the front direction; the horizontal direction orthogonal to the front-rear direction is defined as the left-right direction; the vertical direction orthogonal to the front-rear direction is defined as the up-down direction . The following provides several preferred embodiments of modular sewing machines. The following provides several preferred embodiments of the flexibly adjustable feed thread hook mechanism and modular sewing machine.

Embodiment 1 of the flexible and adjustable feeding hooking mechanism

As shown in Figures 1-3, the first embodiment of the flexibly adjustable feeding thread hooking mechanism includes a tooth frame 10, a feeding dog 20 fixedly installed on the tooth frame 10, a tooth wire hooking module 30, and an independent and raising tooth wire hooking module The cloth feeding structure 40 of the structure 30; the thread-lifting and thread-lifting module 30 includes a thread-lifting and thread-lifting drive source 31, a rotatable hook 32, a thread-lifting connection part 101 arranged at the rear end of the tooth holder 10, a thread-lifting and thread-lifting transmission mechanism, The cloth feeding connection part 102 is arranged at the front end of the tooth holder 10, and the driving source 31 for raising the tooth and hooking thread is connected with the hook 32 and the tooth raising connection part 101 of the tooth holder 10 through the tooth raising and hooking transmission mechanism. One of the transmission components is connected with the cloth feed connection part 102 of the tooth frame 10 through a linkage structure. In particular, the thread lifter drive source 31 is independent of the thorn thread take-up drive source 61 for driving the needle 63 in the sewing machine to operate. The driving source 31 of the thread-lifting hook is a motor. A linkage structure is provided between the cloth feeding structure 40 and the thread-lifting and hooking structure 30. The linkage structure is provided with a stitch distance adjustment driving source 51. The linkage structure includes a second mechanism for changing the movement range of the cloth feeding structure. The cloth feed pendulum 375.

When the modular sewing machine equipped with the first embodiment of the thread-lifting and hooking mechanism is running, the driving source 31 for thread-lifting and hooking operates, and the driving source 31 for thread-lifting and hooking drives the rotary hook 32 to rotate in the circumferential direction through the transmission mechanism to perform the thread-hooking action. ; The drive source 31 of the thread-lifting hook drives the tooth frame 10 and the feeding dog 20 to reciprocate up and down through the transmission mechanism to perform the tooth-lifting action; The structure 40 performs a cloth feeding action; therefore, the cloth feeding dog 20 performs a composite motion of the up-and-down reciprocating motion and the front and rear reciprocating motion. In this way, the thread raising and hooking module 30 completes the thread hooking action, the tooth raising action and the cloth feeding action, and then cooperates with other functional modules in the sewing machine to complete the sewing; The transmission ratio of the tooth hook structure 30 to the cloth feeding structure 40 makes the movement distance of the cloth feeding structure change in each movement cycle of the tooth hook structure, so as to realize the control of the needle distance. In particular, the present application integrates the thread raising function, the cloth feeding function and the thread hooking function of the sewing machine into an independent thread raising and thread hooking module 30, and an independent thread raising and thread hooking drive source 31 is used to drive the thread hooking, thread raising and cloth feeding. , the relative timing of the drive source 31 for lifting the thread and the thread for pulling the needle in the sewing machine can be adjusted, so that the timing between the hook 32 and the needle, as well as the feeding dog 20 can be adjusted. The matching sequence of the movement of the machine needle and the needle can adjust the movement track form of the feed dog 20, thereby greatly improving the sewing adaptability of the sewing machine.

Further, the tooth-lifting and thread-hook transmission mechanism includes a tooth-lifting shaft 33 and a lower shaft 34 rotatably supported in the sewing machine casing, a shaft transmission unit connected between the tooth-lifting shaft 33 and the lower shaft 34, and a shaft transmission unit connected between the tooth-lifting shaft 33 and the lower shaft 34. The tooth-lifting transmission unit between the tooth-lifting shaft 33 and the tooth-lifting connection part 101 of the tooth frame 10, the tooth-lifting shaft 33 and the lower shaft 34 both extend left and right, and the right end of the tooth-lifting shaft 33 is driven by the coupling and the tooth-lifting hook wire The motor shaft of the source 31 is fixed, so the tooth-lifting shaft 33 is directly driven and rotated by the tooth-lifting thread-hook drive source 31, and the tooth-lifting shaft 33 drives the lower shaft 34 to rotate through the shaft transmission unit, and the shaft transmission unit makes the lower shaft 34 and the lifter rotate. The rotating speed ratio of the tooth shaft 33 is 2:1, the rotary hook 32 is fixed on the end of the lower shaft 34, and the tooth lifting shaft 33 is connected with the cloth feeding connection part 102 of the tooth frame 10 through a linkage structure.

The shaft transmission unit includes a first gear 363 fixed on the lifting shaft 33, an intermediate shaft 364 rotatably supported in the sewing machine casing and parallel to the lifting shaft 33, a second gear 365 fixed on the intermediate shaft 364, And the third gear 366 fixed on the lower shaft 34, the right end of the lifting shaft 33 is fixed with the motor shaft of the driving source 31 for lifting the wire through the coupling, and the lifting shaft 33 is directly driven by the driving source 31 for lifting the wire During rotation, the first gear 363 meshes with the second gear 365 , and the second gear 365 meshes with the third gear 366 .

The tooth-lifting transmission unit includes a first tooth-lifting eccentric wheel 350 fixed on the left end of the tooth-lifting shaft 33 and a first tooth-lifting connecting rod 351 . In the shaft portion, one end of the tooth-lifting link is rotatably mounted on the first tooth-lifting eccentric shaft portion, and the other end is hinged with the tooth-lifting connecting portion 101 of the tooth frame 10 .

The linkage structure includes a feeding shaft 370 parallel to the lifting shaft 33, a feeding eccentric 371 fixed on the lifting shaft 33, a first feeding link 372, a feeding swing seat 373 with a fixed swinging fulcrum, a first The cloth feed lever 374, the second cloth feed lever 375, the first cloth feed crank 376 fixed on the right end of the cloth feed shaft 370, and the tooth bracket seat 42 fixed on the left end of the cloth feed shaft 370, the first cloth feed link 372 The rear end is rotatably mounted on the cloth feeding eccentric wheel 371, the front end of the first cloth feeding link 372, one end of the first cloth feeding swing rod 374, and one end of the second cloth feeding swing rod 375 are coaxially hinged. The other end of the first cloth feeding swing rod 374 is hinged with the cloth feeding swing seat 373 , the other end of the second cloth feeding swing rod 375 is hinged with the first cloth feeding crank 376 , and the rack seat 42 is connected with the cloth feeding connection portion 102 of the rack 10 . Hinged. The angle of the feeding swing seat 373 determines the transmission efficiency of the linkage structure, that is, determines the swing amplitude of the feeding shaft 370 reciprocatingly driven by the lifting shaft 33 through the linkage structure, or in other words, determines the reciprocating movement of the tooth frame 10 and the feeding dog 20 back and forth. range of motion, which determines the stitch length of the modular sewing machine.

The needle distance adjustment driving source 51 is connected with the cloth feeding swinging seat 373 in a driving manner, and drives the cloth feeding swinging seat 373 to rotate around its fixed swinging fulcrum. The needle distance adjustment driving source 51 is a motor, and the motor shaft of the needle distance adjustment driving source 51 is fixedly connected with the cloth feeding swing seat 373, so the needle distance adjustment driving source 51 can directly drive the cloth feeding swing seat 373 to rotate around its fixed swing fulcrum, thereby Changing or maintaining the angle of the cloth feed swinging seat 373 also changes or maintains the stitch length of the modular sewing machine accordingly. The fixed swing fulcrum of the cloth feeding swing seat 373 is located on the central axis of the motor shaft of the stitch length adjustment drive source 51 , and the motor shaft of the stitch length adjustment drive source 51 extends left and right.

The second embodiment of the flexible and adjustable feeding hooking mechanism

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 only in that the connection form of the thread raising mechanism and the thread raising drive source 31 is different. Specifically, as shown in FIG. 4 , the motor shaft of the thread-lifting drive source 31 is connected to the right end of the lower shaft 34 through a coupling, so the lower shaft 34 is directly driven to rotate by the thread-lifting drive source 31 , and the lower shaft 34 is directly driven to rotate. 34 drives the tooth-lifting shaft 33 to rotate through the shaft transmission unit, and the tooth-lifting shaft 33 drives the cloth feeding shaft 370 to swing through the linkage structure.

The third embodiment of the flexible and adjustable feeding hooking mechanism

The difference between Embodiment 3 of the flexibly adjustable feeding thread hooking mechanism and Embodiment 1 of the flexibly adjustable feeding thread hooking mechanism is only in that the connection form of the thread raising mechanism and the thread raising drive source 31 is different. Specifically, as shown in FIG. 18 , the motor shaft of the thread-lifting drive source 31 is connected to the right end of the intermediate shaft 364 through a coupling, so the intermediate shaft 364 is directly driven to rotate by the thread-lifting drive source 31, and the intermediate shaft 364 drives the lifting shaft 33 and the lower shaft 34 to rotate through the shaft transmission unit, and the lifting shaft 33 drives the cloth feeding shaft 370 to swing through the linkage structure.

The fourth embodiment of the flexible and adjustable feeding hooking mechanism

The difference between the fourth embodiment of the flexibly adjustable feeding thread hooking mechanism and the first embodiment of the flexibly adjustable feeding thread hooking mechanism is only in that the structure of the tooth-lifting thread hooking transmission mechanism is different. Specifically, as shown in FIGS. 19 and 20 , the tooth-lifting transmission unit includes a second tooth-lifting eccentric 352 fixed on the left end of the tooth-lifting shaft 33 , a second tooth-lifting link 353 , which are parallel to the tooth-lifting shaft 33 and distributed in the The drive shaft 354 on the left side of the lift shaft 33, the lift swing rod 355 fixed on the right end of the drive shaft 354, the lift crank 356 fixed on the left end of the drive shaft 354, and the third lift link 357, the second lift is eccentric The wheel 352 has a second tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft 33, one end of the second tooth-lifting link 353 is rotatably mounted on the second tooth-lifting eccentric shaft portion, and the other end is hinged with the tooth-lifting swing rod 355, Both ends of the third tooth-lifting link 357 are hinged with the tooth-lifting crank 356 and the tooth-lifting connecting portion 101 of the tooth frame 10 respectively. The shaft transmission unit cancels the intermediate shaft 364. In the fourth embodiment of the thread-lifting mechanism, as shown in FIGS. 19 and 21, the shaft transmission unit includes a first gear 363 fixed on the tooth-lifting shaft 33, and a first gear 363 fixed on the lower shaft 34. The third gear 366 at the right end, the right end of the tooth-lifting shaft 33 is fixed with the motor shaft of the wire-lifting and hook-lifting drive source 31 through the coupling, and the tooth-lifting shaft 33 is directly driven to rotate by the driving source 31 for raising the tooth and hooking wire, and the first gear 363 meshes with the third gear 366 .

Embodiment 5 of the flexibly adjustable feeding thread hooking mechanism

The difference between the fifth embodiment of the flexibly adjustable feeding wire hooking mechanism and the fourth embodiment of the flexibly adjustable feeding wire hooking mechanism is only that the connection structure between the transmission shaft 354 and the tooth frame 10 in the tooth lifting transmission unit is different. Specifically, in the fifth embodiment of the tooth-lifting and thread-hook mechanism, the connection between the transmission shaft 354 and the tooth frame 10 is in the form of a tooth-lifting fork-shaped crank 358 and a tooth-lifting slider 359 as shown in FIG. 11 . Therefore, the tooth-lifting transmission unit includes a second tooth-lifting eccentric 352 fixed on the left end of the tooth-lifting shaft 33, a second tooth-lifting link 353, and a transmission shaft 354 parallel to the tooth-lifting shaft 33 and distributed on the left side of the tooth-lifting shaft 33 , the tooth-lifting swing rod 355 fixed on the right end of the transmission shaft 354, the tooth-lifting fork-shaped crank 358 fixed on the left end of the transmission shaft 354, and the tooth-lifting slider 359, the second tooth-lifting eccentric wheel 352 has an eccentric eccentric to the tooth-lifting shaft 33 In the second tooth-lifting eccentric shaft part, one end of the second tooth-lifting link 353 is rotatably mounted on the second tooth-lifting eccentric shaft part, and the other end is hinged with the tooth-lifting swing rod 355. The tooth-lifting fork-shaped crank 358 is provided with a The tooth-lifting slider 359 is slidingly matched with the tooth-lifting chute, the tooth-lifting slider 359 is hinged with the tooth-lifting connection part 101 of the tooth-lifting frame 10, and the reciprocating swing of the tooth-lifting shaft 33 realizes the up-and-down reciprocating swing of the tooth-lifting fork-shaped crank 358. The tooth lifting slider 359 drives the tooth frame 10 and the feeding dog 20 to reciprocate up and down.

In Embodiments 1 to 5 of the above-mentioned flexible and adjustable feeding thread hooking mechanism, the thread raising and threading mechanism includes an independent thread raising and threading module 30, and an independent thread raising and threading driving source 31 is used to raise the threading thread. The module 30 at least has a thread hooking function, a tooth lifting function and a cloth feeding function, and preferably also has a needle distance adjustment function. Based on this, the present application further provides a modular sewing machine with at least two independent functional modules. The modular sewing machine includes any one of the above-mentioned tooth-lifting and thread-hooking mechanisms in Embodiments 1 to 5, And the needle cloth take-up module 60 . For example, as shown in FIG. 22 , the modular sewing machine includes the first embodiment of the above-mentioned thread-lifting and thread-hooking mechanism, and the thorn cloth thread take-up module 60, so the modular sewing machine at least has the thread-elevating and thread-hook module 30 and the thorn cloth thread take-up module 60, Preferably, there is also a stitch adjustment module 50 . Wherein, the thorn cloth thread take-up module 60 includes the above-mentioned thorn cloth thread take-up drive source 61, a needle bar 62 that can reciprocate up and down, a needle 63 installed at the lower end of the needle bar 62, a thread take-up lever that can swing up and down, and a needle bar 62. Thread take-up transmission mechanism, the drive source 61 for thorn cloth thread take-up is connected with the needle bar 62 and the thread take-up lever through the thorn cloth thread take-up transmission mechanism, and drives the needle bar 62 and the thread take-up lever to move.

To sum up, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present invention should still be covered by the claims of the present invention.

Claims (8)

A flexibly adjustable feeding wire hooking mechanism, comprising a tooth frame (10), a feeding dog (20) mounted on the tooth frame (10), and characterized in that it further comprises a tooth lifting wire hooking structure (30) and an independent The cloth feeding structure (40) and the thread-lifting structure (30) are provided with a driving source (31) for thread-lifting, the cloth-feeding structure (40) and the thread-lifting and thread-lifting structure (30). A linkage structure is arranged between the structures (30), the linkage structure is provided with a stitch adjustment driving source (51), and the linkage structure includes a second cloth feeding pendulum rod (375) for changing the movement range of the cloth feeding structure , the drive source (31) for raising the thread and hooking the thread is independent of the drive source for driving the needle in the sewing machine. A flexibly adjustable feeding thread hooking mechanism according to claim 1, wherein the linkage structure comprises a cloth feeding rod (370), and a first cloth feeding crank is fixed on the cloth feeding rod (370). (376), the tooth-lifting structure includes a tooth-lifting rod (33), and the tooth-lifting rod is connected with a first feeding rod (372), and one end of the first feeding crank (376) is connected to the tooth-lifting rod The rod (33) is rotatably connected, and the other end is rotatably connected with the first cloth feeding link (372). One end of the first cloth feeding link is provided with a cloth feeding eccentric (371). The cloth feeding eccentric (371) ) is installed on the tooth lifting rod (33). A flexibly adjustable feeding thread hooking mechanism according to claim 2, characterized in that the linkage structure further comprises a cloth feeding swing seat (373) and a first cloth feeding pendulum rod (374), the first cloth feeding One end of the swing rod (374) is rotatably connected with the second cloth feeding swing rod, and the other end is connected with the cloth feeding swing seat, and the stitch adjustment driving source (51) controls the swing seat to rotate. A flexibly adjustable feeding thread hooking mechanism according to claim 1, characterized in that the tooth frame is provided with a cloth feeding connection part (102) connected with the cloth feeding structure, and a cloth feeding connection part (102) connected with the tooth lifting structure. The tooth-lifting connecting part (101), the cloth feeding structure (40) further comprises a tooth holder seat (42), and the cloth feeding shaft (370) drives the tooth holder seat to swing when rotated. A flexible and adjustable feeding wire hooking mechanism according to claim 1, characterized in that, the tooth lifting wire hooking structure (30) comprises a tooth lifting structure and a wire hooking structure, and the tooth lifting wire hooking drive source ( 31) Drive the tooth-lifting structure and the hook-line structure through the shaft transmission unit. A flexible and adjustable feeding hooking mechanism according to claim 5, characterized in that the shaft transmission unit comprises a first gear (363) fixed on the tooth-lifting shaft (33), rotatably supported on the An intermediate shaft (364) in the sewing machine casing, a second gear (365) fixed on the intermediate shaft (364), and a third gear (366) fixed on the lower shaft (34), the tooth-lifting shaft (33) ), one of the lower shaft (34) and the intermediate shaft (364) is drivingly connected with the thread-lifting drive source (31), and is driven to rotate by the thread-lifting drive source (31). (363) meshes with the second gear (365) which meshes with the third gear (366). A flexibly adjustable feeding wire hooking mechanism according to claim 5, characterized in that: the shaft transmission unit comprises a first gear (363) fixed on the tooth-lifting shaft (33), and a first gear (363) fixed on the lower shaft ( 34) on the third gear (366), the tooth-lifting shaft (33) or the lower shaft (34) is drivingly connected with the tooth-lifting and hook-thread driving source (31), and is driven by the tooth-lifting and hook-wire driving source (31) Rotating, the first gear (363) meshes with the third gear (366). A sewing machine is characterized in that: the sewing machine is equipped with the thread-lifting and thread-hooking mechanism with adjustable stitch pitch according to any one of claims 1-12.

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