A flexible and adjustable feeding and thread hooking mechanism and sewing machine

Abstract

The present invention provides a flexibly adjustable feeding thread hooking mechanism and a sewing machine. The flexibly adjustable feeding thread hooking mechanism includes a tooth frame, a feed tooth and a feeding thread hooking module. The feeding thread hooking module includes a feeding thread hooking driving source, a rotatable rotary hook, a tooth lifting connection portion arranged at one end of the tooth frame, and a tooth lifting thread hooking transmission mechanism. The feeding thread hooking driving source is connected to the rotary hook and the tooth lifting connection portion of the tooth frame through the tooth lifting thread hooking transmission mechanism. The feeding thread hooking driving source is independent of the driving source used to drive the machine needle in the sewing machine. The present application combines the tooth lifting function and the thread hooking function of the sewing machine into an independent functional module, and uses an independent feeding thread hooking driving source to drive the thread hooking and lifting teeth, so that the relative timing of the feeding thread hooking driving source and the driving source used to drive the machine needle in the sewing machine can be adjusted, so that the coordination timing of the rotary hook and the machine needle, and the coordination timing of the up and down reciprocating motion of the feed tooth and the machine needle can be adjusted, which greatly improves the sewing adaptability of the sewing machine.

Description

Technical Field

[0001] The invention relates to a flexible and adjustable feeding and hooking mechanism.

[0002] The invention also relates to a sewing machine comprising the above-mentioned flexibly adjustable feeding and thread hooking mechanism. Background Art

[0003] At present, the structure of the sewing machine in the prior art is as follows Figure 1 As shown, the sewing machine mainly includes a main motor 100, a main shaft 200 driven by the main motor 100, a piercing thread take-up mechanism 300, a feeding mechanism 400 and a thread hooking mechanism 500. The power of the piercing thread take-up mechanism 300, the feeding mechanism 400 and the thread hooking mechanism 500 all comes from the main shaft 200. When the sewing machine is running, the main motor 100 drives the main shaft 200 to rotate circumferentially, and the main shaft 200 transmits power to the needle 301 in the piercing thread take-up mechanism 300, the feed tooth 401 in the feeding mechanism 400, and the rotary hook 501 in the thread hooking mechanism 500 through each transmission mechanism, so that the needle 301 moves up and down reciprocatingly to perform the piercing action, the feed tooth 401 moves up and down and moves back and forth in a composite motion to perform the feeding action, and the rotary hook 501 rotates circumferentially to perform the 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 rotary hook 501 through a relatively complex transmission structure. However, this structural form of the sewing machine has the following defects: 1. The timing of the needle and the rotary hook cannot be adjusted; 2. The motion track of the feed dog cannot be adjusted; 3. The parts processing accuracy is high. Therefore, the existing sewing machine is difficult to adapt to the increasingly complex sewing conditions. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a flexibly adjustable feeding and thread hooking mechanism to improve sewing adaptability.

[0005] To achieve the above-mentioned purpose, the present invention provides a flexibly adjustable feeding thread hooking mechanism, comprising a tooth frame, a feed tooth installed on the tooth frame, and a feeding thread hooking module, the feeding thread hooking module comprising a feeding thread hooking driving source, a rotatable hook, a tooth lifting connecting portion arranged at one end of the tooth frame, and a tooth lifting thread hooking transmission mechanism, the feeding thread hooking driving source is connected to the hook and the tooth lifting connecting portion of the tooth frame through the tooth lifting thread hooking transmission mechanism, and the feeding thread hooking driving source is independent of the driving source used to drive the needle in the sewing machine.

[0006] Furthermore, the feeding thread hooking mechanism also includes a cloth feeding module independent of the feeding thread hooking module, the cloth feeding module includes a cloth feeding drive source, a cloth feeding connecting part arranged at the other end of the tooth frame, and a first cloth feeding transmission mechanism, the cloth feeding drive source is connected to the cloth feeding connecting part of the tooth frame through the first cloth feeding transmission mechanism, and the feeding thread hooking drive source and the cloth feeding drive source are independent of each other.

[0007] Furthermore, the feeding and thread hooking module also includes a cloth feeding connection part arranged at the other end of the tooth frame, and a second cloth feeding transmission mechanism, and a transmission component in the tooth lifting and thread hooking transmission mechanism is connected to the cloth feeding connection part of the tooth frame through the second cloth feeding transmission mechanism.

[0008] Furthermore, the tooth lifting and thread hooking transmission mechanism includes a tooth lifting shaft and a lower shaft both rotatably supported in a sewing machine housing, a shaft transmission unit connected between the tooth lifting shaft and the lower shaft, and a tooth lifting transmission unit connected between the tooth lifting shaft and the tooth lifting connecting part of the tooth frame. The tooth lifting shaft or the lower shaft is transmission-connected to a feeding and thread hooking driving source and is driven to rotate by the feeding and thread hooking driving source. The shaft transmission unit makes the speed ratio of the lower shaft and the tooth lifting shaft 2:1, and the rotary hook is fixed to the end of the lower shaft.

[0009] Furthermore, the tooth-lifting transmission unit includes a first tooth-lifting eccentric wheel fixed to the tooth-lifting shaft, and a first tooth-lifting connecting rod, the first tooth-lifting eccentric wheel having a first tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft, one end of the first tooth-lifting connecting rod is rotatably mounted on the first tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting connecting portion of the tooth frame.

[0010] Furthermore, the tooth-lifting transmission unit includes a second tooth-lifting eccentric wheel fixed to the tooth-lifting shaft, a second tooth-lifting connecting rod, a transmission shaft parallel to the tooth-lifting shaft, a tooth-lifting rocker arm fixed at one end of the transmission shaft, a tooth-lifting crank fixed at the other end of the transmission shaft, and a third tooth-lifting connecting rod. The second tooth-lifting eccentric wheel has a second tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft, one end of the second tooth-lifting connecting rod is rotatably mounted on the second tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting rocker arm, and both ends of the third tooth-lifting connecting rod are respectively hinged to the tooth-lifting crank and the tooth-lifting connecting portion of the tooth frame.

[0011] Furthermore, the tooth-lifting transmission unit includes a second tooth-lifting eccentric wheel fixed to the tooth-lifting shaft, a second tooth-lifting connecting rod, a transmission shaft parallel to the tooth-lifting shaft, a tooth-lifting rocker arm fixed at one end of the transmission shaft, a tooth-lifting fork crank fixed at the other end of the transmission shaft, and a tooth-lifting slider. The second tooth-lifting eccentric wheel has a second tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft, one end of the second tooth-lifting connecting rod is rotatably mounted on the second tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting rocker arm. The tooth-lifting fork crank is provided with a tooth-lifting slide groove that slidably cooperates with the tooth-lifting slider, and the tooth-lifting slider is hinged to the tooth-lifting connecting portion of the tooth frame.

[0012] Furthermore, the shaft transmission unit includes a first pulley fixed on the lower shaft, a second pulley fixed on the tooth lifting shaft, and a transmission belt connecting the first pulley and the second pulley.

[0013] Furthermore, the shaft transmission unit includes a first gear fixed on the tooth-lifting shaft, an intermediate shaft rotatably supported in the sewing machine housing, a second gear fixed on the intermediate shaft, and a third gear fixed on the lower shaft. One of the tooth-lifting shaft, the lower shaft and the intermediate shaft is transmission-connected to the feed hook drive source and driven to rotate by the feed hook drive source. The first gear is meshed with the second gear, and the second gear is meshed with the third gear.

[0014] Furthermore, the shaft transmission unit includes a first gear fixed on the tooth lifting shaft and a third gear fixed on the lower shaft, the tooth lifting shaft or the lower shaft is connected to the feeding hook driving source and driven to rotate by the feeding hook driving source, and the first gear is meshed with the third gear.

[0015] Furthermore, the tooth-lifting and thread-hooking transmission mechanism has a tooth-lifting shaft rotatably supported in a sewing machine housing, and the second cloth-feeding transmission mechanism includes a cloth-feeding shaft parallel to the tooth-lifting shaft, a cloth-feeding eccentric wheel fixed on the tooth-lifting shaft, a first cloth-feeding connecting rod, a cloth-feeding swing seat with a fixed swing fulcrum, a first cloth-feeding rocker rod, a second cloth-feeding rocker rod, and a first cloth-feeding crank and a tooth-frame seat both fixed to the cloth-feeding shaft, one end of the first cloth-feeding connecting rod is rotatably mounted on the cloth-feeding eccentric wheel, the other end of the first cloth-feeding connecting rod, one end of the first cloth-feeding rocker rod, and one end of the second cloth-feeding rocker rod are coaxially hinged, the other end of the first cloth-feeding rocker rod is hinged to the cloth-feeding swing seat, the other end of the second cloth-feeding rocker rod is hinged to the first cloth-feeding crank, and the tooth-frame seat is hinged to the cloth-feeding connecting part of the tooth-frame.

[0016] Furthermore, the feeding thread hooking mechanism also includes a needle distance adjustment module independent of the feeding thread hooking module, and the needle distance adjustment module includes a needle distance adjustment drive source independent of the feeding thread hooking drive source, and the needle distance adjustment drive source is transmission-connected to the cloth feeding swing seat and drives the cloth feeding swing seat to rotate around its fixed swing fulcrum.

[0017] The present application also provides a sewing machine, in which the feeding and thread hooking mechanism as described above is configured.

[0018] As described above, the flexibly adjustable feeding and thread hooking mechanism and sewing machine according to the present invention have the following beneficial effects:

[0019] In the present application, the tooth lifting function and thread hooking function of the sewing machine are integrated into an independent functional module, and an independent feeding and thread hooking driving source is used to drive the thread hooking and tooth lifting, so that the relative timing of the feeding and thread hooking driving source and the driving source for driving the needle in the sewing machine can be adjusted, thereby being able to adjust the coordination timing of the rotary shuttle and the needle, as well as the coordination timing of the up and down reciprocating motion of the feed dog and the needle, so that the motion trajectory of the feed dog can be adjusted, thereby greatly improving the sewing adaptability of the sewing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a sewing machine in the prior art.

[0021] Figure 2 It is a structural schematic diagram of the first embodiment of the flexibly adjustable feeding and hooking mechanism in the present application.

[0022] Figure 3 for Figure 2 Schematic diagram of the structure of the mid-feed hook module.

[0023] Figure 4 for Figure 2 Schematic diagram of the structure of the middle cloth feeding module.

[0024] Figure 5 for Figure 2 Schematic diagram of the movement trajectory changes of the middle feed dog.

[0025] Figure 6 It is a structural schematic diagram of the second embodiment of the flexibly adjustable feeding and hooking mechanism in the present application.

[0026] Figure 7 This is a structural diagram of Example 3 of the flexibly adjustable feeding and hooking mechanism in the present application.

[0027] Figure 8 It is a structural schematic diagram of the fourth embodiment of the flexibly adjustable feeding and hooking mechanism in the present application.

[0028] Fig. 9 and Fig.10 It is a schematic diagram of the structure of the flexible adjustable feeding and hooking mechanism embodiment 5 in the present application at different viewing angles.

[0029] Fig.11 This is a structural schematic diagram of the tooth-lifting transmission unit in Example 6 of the flexibly adjustable feeding and hooking mechanism in the present application.

[0030] Fig.12 It is a schematic structural diagram of a modular sewing machine equipped with a feeding and thread hooking mechanism embodiment 1 in the present application.

[0031] Fig.13 It is a schematic structural diagram of a modular sewing machine equipped with a fifth embodiment of a feeding and thread hooking mechanism in the present application.

[0032] Fig.14 This is a structural diagram of Example 7 of the flexibly adjustable feeding and hooking mechanism in the present application.

[0033] Fig.15 for Fig.14 Schematic diagram of the structure of the mid-feed hook module.

[0034] Fig.16 for Fig.14 Schematic diagram of the structure of the central shaft transmission unit.

[0035] Fig.17 This is a structural diagram of Example 8 of the flexibly adjustable feeding and hooking mechanism in the present application.

[0036] Fig.18 It is a structural schematic diagram of Example 9 of the flexibly adjustable feeding and hooking mechanism in the present application.

[0037] Fig.19 It is a structural schematic diagram of the tenth embodiment of the flexibly adjustable feeding and hooking mechanism in the present application.

[0038] Fig. 20 for Fig.19 Schematic diagram of the structure of the central tooth lifting transmission unit.

[0039] Fig.21 for Fig.19 Schematic diagram of the structure of the central shaft transmission unit.

[0040] Fig. 22 It is a schematic structural diagram of a modular sewing machine equipped with a seventh embodiment of a feeding and thread hooking mechanism in the present application.

[0041] Component number description

[0042] 10. Tooth frame

[0043] 101 Tooth lifting connection

[0044] 102 cloth feeding connection

[0045] 20 Feed dog

[0046] 30 Feeding hook module

[0047] 31 Feeding hook line drive source

[0048] 32 Hook

[0049] 33 Tooth lifting axis

[0050] 34 Lower shaft

[0051] 350 First lifting eccentric wheel

[0052] 351 First tooth lifting connecting rod

[0053] 352 Second lifting eccentric wheel

[0054] 353 Second tooth lifting connecting rod

[0055] 354 Drive shaft

[0056] 355 Tooth lifting lever

[0057] 356 Tooth lift crank

[0058] 357 Third tooth lifting connecting rod

[0059] 358 Lifting Fork Crank

[0060] 359 tooth lift slider

[0061] 360 First Pulley

[0062] 361 Second pulley

[0063] 362 Transmission belt

[0064] 363 First Gear

[0065] 364 Intermediate shaft

[0066] 365 Second Gear

[0067] 366 Third Gear

[0068] 370 Feed shaft

[0069] 371 Feed eccentric wheel

[0070] 372 First cloth feeding connecting rod

[0071] 373 Feeding Swing Seat

[0072] 374 First cloth feeding lever

[0073] 375 Second cloth feeding lever

[0074] 376 First feed crank

[0075] 40 Feed module

[0076] 41 Feed drive source

[0077] 42 tooth frame

[0078] 43 First feed crank

[0079] 44 First cloth feeding connecting rod

[0080] 50 Needle length adjustment module

[0081] 51 Needle length adjustment drive source

[0082] 60 Thread take-up module

[0083] 61 Fabric thread take-up drive source

[0084] 62 Needle bar

[0085] 63 Needle

[0086] 70 Support seat DETAILED DESCRIPTION

[0087] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0088] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0089] The present application provides a sewing machine, in particular, the sewing machine is a modular sewing machine, having the following flexibly adjustable feeding and thread hooking mechanism. 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-to-back direction is defined as the left-right direction; the vertical direction orthogonal to the front-to-back direction is defined as the up-down direction. The following provides several preferred embodiments of the modular sewing machine. The following provides several preferred embodiments of the flexibly adjustable feeding and thread hooking mechanism and the modular sewing machine.

[0090] Embodiment 1 of the flexible adjustable feeding hook mechanism

[0091] like Figure 2 and Figure 3As shown, the first embodiment of the flexibly adjustable feeding thread hooking mechanism includes a tooth frame 10, a feed tooth 20 fixedly mounted on the tooth frame 10, and a feeding thread hooking module 30; the feeding thread hooking module 30 includes a feeding thread hooking driving source 31, a rotatable rotary hook 32, a tooth lifting connecting portion 101 arranged at the rear end of the tooth frame 10, and a tooth lifting thread hooking transmission mechanism, and the feeding thread hooking driving source 31 is connected to the rotary hook 32 and the tooth lifting connecting portion 101 of the tooth frame 10 through the tooth lifting thread hooking transmission mechanism. In particular, the feeding thread hooking driving source 31 is independent of the driving source for driving the machine needle 63 in the sewing machine, and the driving source for driving the machine needle 63 in the sewing machine is defined as the cloth picking thread driving source 61 below. The feeding thread hooking driving source 31 is a motor.

[0092] When the modular sewing machine equipped with the first embodiment of the feeding thread hooking mechanism is in operation, the feeding thread hooking driving source 31 is in operation, and the feeding thread hooking driving source 31 drives the rotary hook 32 to rotate circumferentially through the lifting thread hooking transmission mechanism to perform the thread hooking action; the feeding thread hooking driving source 31 drives the tooth frame 10 to reciprocate up and down through the lifting thread hooking transmission mechanism, and the tooth frame 10 drives the feed tooth 20 to reciprocate up and down together to perform the lifting action. In this way, the feeding thread hooking module 30 completes the thread hooking action and the lifting action, and then cooperates with other functional modules in the sewing machine to complete sewing. In particular, the present application combines the tooth lifting function and thread hooking function of the sewing machine into an independent feeding thread hooking module 30, and uses an independent feeding thread hooking drive source 31 to drive the thread hooking and tooth lifting, thereby realizing that the relative timing of the feeding thread hooking drive source 31 and the cloth picking thread driving source 61 used to drive the needle 63 in the sewing machine is adjustable, thereby being able to adjust the coordination timing of the rotary shuttle 32 and the needle 63, as well as the coordination timing of the up and down reciprocating motion of the feed dog 20 and the needle 63, thereby being able to adjust the motion trajectory of the feed dog 20, thereby greatly improving the sewing adaptability of the sewing machine.

[0093] Furthermore, if Figure 2 and Figure 3 As shown, the feed thread hooking mechanism also includes a cloth feeding module 40 independent of the feed thread hooking module 30, and the cloth feeding module 40 includes a cloth feeding drive source 41, a cloth feeding connecting part 102 arranged at the front end of the tooth frame 10, and a first cloth feeding transmission mechanism. The cloth feeding drive source 41 is connected to the cloth feeding connecting part 102 of the tooth frame 10 through the first cloth feeding transmission mechanism, and drives the tooth frame 10 to reciprocate back and forth, and the tooth frame 10 drives the feed tooth 20 to reciprocate back and forth to perform the cloth feeding action. In particular, the feed thread hooking drive source 31 and the cloth feeding drive source 41 are independent of each other, and the cloth feeding drive source 41 is also independent of the cloth picking thread driving source 61 in the sewing machine for driving the machine needle 63 to operate. The cloth feeding drive source 41 is a motor. Preferably, as Figure 2 and Figure 4As shown, the first cloth feeding transmission mechanism includes a second cloth feeding crank 43, one end of which is fixed on the motor shaft of the cloth feeding driving source 41, a second cloth feeding connecting rod 44, and a tooth frame seat 42 with a fixed swing fulcrum, and the two ends of the second cloth feeding connecting rod 44 are respectively hinged with the other end of the second cloth feeding crank 43 and the tooth frame seat 42. When the cloth feeding driving source 41 rotates, it drives the second cloth feeding crank 43 to swing back and forth, and drives the tooth frame 10 and the cloth feeding dog 20 to reciprocate back and forth through the second cloth feeding connecting rod 44 and the tooth frame seat 42 to perform the cloth feeding action.

[0094] Therefore, embodiment 1 of the feeding thread hooking mechanism includes two functional modules: a feeding thread hooking module 30 and a cloth feeding module 40 which are independent of each other. The feeding thread hooking module 30 is also a thread lifting module. An independent feeding thread hooking driving source 31 is used to drive the thread hooking and the lifting teeth. An independent cloth feeding module 40 is used to drive the cloth feeding. The thread hooking and lifting teeth driving, as well as the cloth feeding driving are independent of the cloth thread picking driving in the sewing machine. In this way, on the one hand, the relative timing of the feed thread hooking drive source 31 and the cloth picking thread picking drive source 61 is adjustable, so as to adjust the coordination timing of the rotary hook 32 and the needle 63, and adjust the time when the rotary hook 32 hooks the thread relative to the needle 63. When sewing thin materials, the thread hooking time is earlier, and when sewing thick materials, the thread hooking time is later; on the other hand, the relative timing of the feed thread hooking drive source 31 and the cloth feeding drive source 41 is also adjustable, and the output law of the cloth feeding drive source 41 relative to the feed thread hooking drive source 31 can be adjusted, so as to adjust the stitch length, switch between forward and reverse sewing, and change the cloth feeding trajectory of the feed dog 20, for example, the following can be achieved: Figure 5 The elliptical cloth feeding path shown in a, or Figure 5 The front triangle feeding track shown in b, or Figure 5 c shows the rear triangle feeding track, or Figure 5 d, wherein the elliptical cloth feeding track and the front triangle cloth feeding track are suitable for sewing thin and medium-thick materials, and the rear triangle cloth feeding track and the rectangular cloth feeding track are suitable for sewing thick materials. In this way, the feeding thread hooking mechanism embodiment 1 can adjust the early or late timing of the hooking of the rotary hook 32 relative to the needle 63, as well as the cloth feeding track of the feed dog 20, greatly improving the sewing adaptability of the sewing machine.

[0095] Furthermore, if Figure 2 and Figure 3As shown, the tooth lifting and thread hooking transmission mechanism includes a tooth lifting shaft 33 and a lower shaft 34 both rotatably supported in the sewing machine housing, a shaft transmission unit connected between the tooth lifting shaft 33 and the lower shaft 34, and a tooth lifting transmission unit connected 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 fixed to the motor shaft of the feeding and thread hooking driving source 31 through a coupling. Therefore, the tooth lifting shaft 33 is directly driven to rotate by the feeding and thread hooking driving source 31, and the tooth lifting shaft 33 then drives the lower shaft 34 to rotate circumferentially around its central axis through the shaft transmission unit, and the shaft transmission unit makes the speed ratio of the lower shaft 34 and the tooth lifting shaft 33 be 2:1, and the rotary shuttle 32 is fixed to the end of the lower shaft 34.

[0096] Preferably, if Figure 2 and Figure 3 As shown, the shaft transmission unit includes a first pulley 360 fixed on the lower shaft 34, a second pulley 361 fixed on the tooth-lifting shaft 33, and a transmission belt 362 connecting the first pulley 360 and the second pulley 361. The tooth-lifting transmission unit includes a first tooth-lifting eccentric wheel 350 fixed to the left end of the tooth-lifting shaft 33, and a first tooth-lifting connecting rod 351, the first tooth-lifting eccentric wheel 350 has a first tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft 33, one end of the first tooth-lifting connecting rod 351 is rotatably mounted on the first tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting connecting portion 101 of the tooth frame 10.

[0097] Embodiment 2 of the flexible adjustable feeding hook mechanism

[0098] The difference between the flexible adjustable feeding and hooking mechanism embodiment 2 and the flexible adjustable feeding and hooking mechanism embodiment 1 is that the connection point between the feeding and hooking driving source 31 and the lifting and hooking transmission mechanism is different. Figure 6 As shown, the right end of the lower shaft 34 is fixedly connected to the motor shaft of the feed hook wire driving source 31 through a coupling, so the lower shaft 34 is directly driven to rotate by the feed hook wire driving source 31, and the lower shaft 34 then drives the tooth lifting shaft 33 to rotate through the shaft transmission unit, and the shaft transmission unit makes the speed ratio of the lower shaft 34 and the tooth lifting shaft 33 2:1. The shaft transmission unit is still a synchronous pulley structure.

[0099] Embodiment 3 of the flexible adjustable feeding hook mechanism

[0100] The difference between the third embodiment of the flexibly adjustable feeding and hooking mechanism and the first embodiment of the flexibly adjustable feeding and hooking mechanism is that the structure of the shaft transmission unit is different. Figure 7As shown, the shaft transmission unit includes a first gear 363 fixed on the tooth-lifting shaft 33, an intermediate shaft 364 rotatably supported in the sewing machine housing and parallel to the tooth-lifting shaft 33, a second gear 365 fixed on the intermediate shaft 364, and a third gear 366 fixed on the lower shaft 34. The right end of the tooth-lifting shaft 33 is fixed to the motor shaft of the feed hook drive source 31 through a coupling, and the tooth-lifting shaft 33 is directly driven to rotate by the feed hook drive source 31. The first gear 363 is meshed with the second gear 365, and the second gear 365 is meshed with the third gear 366.

[0101] Embodiment 4 of the flexible adjustable feeding hook mechanism

[0102] The difference between the fourth embodiment of the flexibly adjustable feeding and hooking mechanism and the first embodiment of the flexibly adjustable feeding and hooking mechanism is that the structure of the shaft transmission unit is different. Figure 8 As shown, the shaft transmission unit includes a first gear 363 fixed on the tooth-lifting shaft 33, an intermediate shaft 364 rotatably supported in the sewing machine housing and parallel to the tooth-lifting shaft 33, a second gear 365 fixed on the intermediate shaft 364, and a third gear 366 fixed on the lower shaft 34. The right end of the intermediate shaft 364 is fixed to the motor shaft of the feed hook drive source 31 through a coupling. The intermediate shaft 364 is directly driven to rotate by the feed hook drive source 31, and the first gear 363 is meshed with the second gear 365, and the second gear 365 is meshed with the third gear 366.

[0103] Embodiment 5 of the flexible adjustable feeding hook mechanism

[0104] The difference between the flexible adjustable feeding and hooking mechanism embodiment 5 and the flexible adjustable feeding and hooking mechanism embodiment 1 is that the structures of the shaft transmission unit and the tooth lifting transmission unit are different. Fig. 9 and Fig.10As shown, the shaft transmission unit includes a first gear 363 fixed on the tooth-lifting shaft 33, and a third gear 366 fixed on the lower shaft 34. The right end of the tooth-lifting shaft 33 is fixedly connected to the motor shaft of the feed hook drive source 31 through a coupling. Therefore, the tooth-lifting shaft 33 is directly driven to rotate by the feed hook drive source 31, and the first gear 363 is meshed with the third gear 366, thereby driving the lower shaft 34 to rotate. The tooth-lifting transmission unit includes a second tooth-lifting eccentric wheel 352 fixed on the tooth-lifting shaft 33, a second tooth-lifting connecting rod 353, a transmission shaft 354 parallel to the tooth-lifting shaft 33, a tooth-lifting rocker arm 355 fixed on the right end of the transmission shaft 354, a tooth-lifting crank 356 fixed on the left end of the transmission shaft 354, and a third tooth-lifting connecting rod 357. The second tooth-lifting eccentric wheel 352 has a second tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft 33, one end of the second tooth-lifting connecting rod 353 is rotatably mounted on the second tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting rocker arm 355, and both ends of the third tooth-lifting connecting rod 357 are respectively hinged to the tooth-lifting crank 356 and the tooth-lifting connecting portion 101 of the tooth frame 10.

[0105] Embodiment 6 of the flexible adjustable feeding hook mechanism

[0106] The difference between the flexible adjustable feeding and hooking mechanism embodiment 6 and the flexible adjustable feeding and hooking mechanism embodiment 5 is that the structure of the tooth lifting transmission unit is different, specifically, the connection structure between the transmission shaft 354 and the tooth lifting connection part 101 of the tooth frame 10 is different. Specifically, Fig. 9 and Fig.11 As shown, the tooth-lifting transmission unit includes a second tooth-lifting eccentric wheel 352 fixed to the tooth-lifting shaft 33, a second tooth-lifting connecting rod 353, a transmission shaft 354 parallel to the tooth-lifting shaft 33, a tooth-lifting rocker arm 355 fixed to the right end of the transmission shaft 354, a tooth-lifting fork crank 358 fixed to the left end of the transmission shaft 354, and a tooth-lifting slider 359. The second tooth-lifting eccentric wheel 352 has a second tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft 33, one end of the second tooth-lifting connecting rod 353 is rotatably mounted on the second tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting rocker arm 355. The tooth-lifting fork crank 358 is provided with a tooth-lifting sliding groove that slides with the tooth-lifting slider 359, and the tooth-lifting slider 359 is hinged to the tooth-lifting connecting portion 101 of the tooth frame 10.

[0107] In the above-mentioned flexible adjustable feeding thread hooking mechanism embodiments 1 to 6, the feeding thread hooking mechanism includes two independent feeding thread hooking modules 30 (i.e., lifting thread hooking modules) and a cloth feeding module 40, each of which uses an independent driving source. Based on this, the present application also provides a modular sewing machine with at least three independent functional modules, which includes any one of the feeding thread hooking mechanisms in the above-mentioned feeding thread hooking mechanism embodiments 1 to 6, and a cloth piercing thread picking module 60.

[0108] For example, Fig.12As shown, the modular sewing machine includes the above-mentioned feeding thread hooking mechanism embodiment 1 and the thorn cloth thread take-up module 60, that is, the feeding thread hooking module 30, the cloth feeding module 40 and the thorn cloth thread take-up module 60, the feeding thread hooking module 30, the cloth feeding module 40 and the thorn cloth thread take-up module 60 are three independent functional modules; wherein, the thorn cloth thread take-up module 60 includes the above-mentioned thorn cloth thread take-up driving source 61, the needle bar 62 that can reciprocate up and down, the machine needle 63 installed at the lower end of the needle bar 62, the thread take-up rod that can reciprocate up and down, and the thorn cloth thread take-up transmission mechanism, the thorn cloth thread take-up driving source 61 is connected with the needle bar 62 and the thread take-up rod through the thorn cloth thread take-up transmission mechanism, and drives the needle bar 62 and the thread take-up rod to move. The thorn cloth thread take-up driving source 61, the feeding thread hooking driving source 31 and the cloth feeding driving source 41 are three independent driving sources. The thorn cloth thread picking module 60, the feeding thread hook module 30 and the cloth feeding module 40 are modularized, and each functional module is driven by an independent driving source, so that the thorn cloth thread picking module 60, the feeding thread hook module 30 and the cloth feeding module 40 are independent of each other and do not interfere with each other, and the transmission structure between the upper shaft and other functional modules in the original sewing machine is eliminated. On the one hand, the transmission chain of each functional module is shortened to avoid vibration, noise and other problems caused by the excessively long transmission chain. On the other hand, the relative motion timing and motion law of each functional module can be adjusted to improve sewing adaptability.

[0109] For example, Fig.13 As shown, the modular sewing machine includes the fifth embodiment of the feeding and hooking mechanism and a thorn cloth thread picking module 60. The structure of the thorn cloth thread picking module 60 is similar to Fig.12 The structure of the middle thorn cloth thread taking-up module 60 is the same. Fig.13 As shown, the fifth embodiment of the feed and thread hooking mechanism also includes a support seat 70 fixed to the bottom plate portion of the sewing machine housing, the feed and thread hooking drive source 31 is fixedly mounted on the support seat 70 by screws, and the intermediate shaft 364, the tooth lifting shaft 33 and the lower shaft 34 are rotatably supported and mounted on the support seat 70 through bearings, that is, they are supported and mounted on the sewing machine housing relative to the support. The support seat 70 has a cavity with an opening facing upward, and the transmission components in the shaft transmission unit are located in the cavity of the support seat 70. The cavity of the support seat 70 is filled with grease or lubricating oil to lubricate the transmission components in the shaft transmission unit. In addition, the support seat 70 is sealed and connected to a cover plate at the upper end opening of its cavity to close the cavity and form a closed space to prevent contamination.

[0110] Embodiment 7 of the flexible adjustable feeding and hooking mechanism

[0111] like Fig.14 and Fig.15As shown, the seventh embodiment of the flexibly adjustable feeding thread hooking mechanism includes a tooth frame 10, a feed tooth 20 fixedly mounted on the tooth frame 10, and a feeding thread hooking module 30; the feeding thread hooking module 30 includes a feeding thread hooking driving source 31, a rotatable rotary hook 32, a tooth lifting connection part 101 arranged at the rear end of the tooth frame 10, a tooth lifting thread hooking transmission mechanism, a cloth feeding connection part 102 arranged at the front end of the tooth frame 10, and a second cloth feeding transmission mechanism, the feeding thread hooking driving source 31 is connected to the rotary hook 32 and the tooth lifting connection part 101 of the tooth frame 10 through the tooth lifting thread hooking transmission mechanism, and a transmission component in the tooth lifting thread hooking transmission mechanism is connected to the cloth feeding connection part 102 of the tooth frame 10 through the second cloth feeding transmission mechanism. In particular, the feeding thread hooking driving source 31 is independent of the cloth picking thread driving source 61 used to drive the machine needle 63 in the sewing machine. The feeding thread hooking driving source 31 is a motor.

[0112] When the modular sewing machine equipped with the seventh embodiment of the feeding and hooking mechanism is in operation, the feeding and hooking driving source 31 is in operation, and the feeding and hooking driving source 31 drives the rotary hook 32 to rotate circumferentially through the lifting and hooking transmission mechanism to perform the thread hooking action; the feeding and hooking driving source 31 drives the tooth frame 10 and the feed dog 20 to reciprocate up and down through the lifting and hooking transmission mechanism to perform the lifting action; a transmission component in the lifting and hooking transmission mechanism drives the tooth frame 10 and the feed dog 20 to reciprocate back and forth through the second feeding transmission mechanism to perform the feeding action; therefore, the feed dog 20 performs a composite motion of up and down reciprocating motion and back and forth reciprocating motion. In this way, the feeding and hooking module 30 completes the thread hooking action, the tooth lifting action and the feeding action, and then cooperates with other functional modules in the sewing machine to complete sewing. In particular, the present application integrates the tooth lifting function, cloth feeding function and thread hooking function of the sewing machine into an independent feeding and thread hooking module 30, and uses an independent feeding and thread hooking drive source 31 to drive the thread hooking, tooth lifting and cloth feeding, so that the relative timing of the feeding and thread hooking drive source 31 and the cloth picking and thread picking drive source 61 used to drive the needle 63 in the sewing machine can be adjusted, so that the coordination timing of the rotary shuttle 32 and the needle 63, as well as the coordination timing of the movement of the feed dog 20 and the needle 63 can be adjusted, so that the movement trajectory of the feed dog 20 can be adjusted, thereby greatly improving the sewing adaptability of the sewing machine.

[0113] Furthermore, if Fig.14 and Fig.15As shown, the tooth lifting and thread hooking transmission mechanism includes a tooth lifting shaft 33 and a lower shaft 34 both 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 tooth lifting transmission unit connected 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 fixed to the motor shaft of the feeding and thread hooking driving source 31 through a coupling, so the tooth lifting shaft 33 is directly driven to rotate by the feeding and thread hooking driving source 31, and the tooth lifting shaft 33 then drives the lower shaft 34 to rotate through the shaft transmission unit, and the shaft transmission unit makes the speed ratio of the lower shaft 34 and the tooth lifting shaft 33 be 2:1, the rotary shuttle 32 is fixed to the end of the lower shaft 34, and the tooth lifting shaft 33 is connected to the cloth feeding connection part 102 of the tooth frame 10 through the second cloth feeding transmission mechanism.

[0114] like Fig.16 As shown, the shaft transmission unit includes a first gear 363 fixed on the tooth-lifting shaft 33, an intermediate shaft 364 rotatably supported in the sewing machine housing and parallel to the tooth-lifting shaft 33, a second gear 365 fixed on the intermediate shaft 364, and a third gear 366 fixed on the lower shaft 34. The right end of the tooth-lifting shaft 33 is fixed to the motor shaft of the feed hook drive source 31 through a coupling, and the tooth-lifting shaft 33 is directly driven to rotate by the feed hook drive source 31. The first gear 363 is meshed with the second gear 365, and the second gear 365 is meshed with the third gear 366.

[0115] like Fig.14 and Fig.15 As shown, the tooth-lifting transmission unit includes a first tooth-lifting eccentric wheel 350 fixed at the left end of the tooth-lifting shaft 33, and a first tooth-lifting connecting rod 351. The first tooth-lifting eccentric wheel 350 has a first tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft 33. One end of the tooth-lifting connecting rod is rotatably mounted on the first tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting connecting portion 101 of the tooth frame 10.

[0116] like Fig.14 and Fig.15As shown, the second cloth feeding transmission mechanism includes a cloth feeding shaft 370 parallel to the tooth lifting shaft 33, a cloth feeding eccentric wheel 371 fixed on the tooth lifting shaft 33, a first cloth feeding connecting rod 372, a cloth feeding swing seat 373 with a fixed swing fulcrum, a first cloth feeding rocker rod 374, a second cloth feeding rocker rod 375, a first cloth feeding crank 376 fixed at the right end of the cloth feeding shaft 370, and a tooth frame seat 42 fixed at the left end of the cloth feeding shaft 370, the rear end of the first cloth feeding connecting rod 372 is rotatably mounted on the cloth feeding eccentric wheel 371, the front end of the first cloth feeding connecting rod 372, one end of the first cloth feeding rocker rod 374, and one end of the second cloth feeding rocker rod 375 are coaxially hinged, the other end of the first cloth feeding rocker rod 374 is hinged to the cloth feeding swing seat 373, the other end of the second cloth feeding rocker rod 375 is hinged to the first cloth feeding crank 376, and the tooth frame seat 42 is hinged to the cloth feeding connecting part 102 of the tooth frame 10. The angle of the cloth feed swing seat 373 determines the transmission efficiency of the second cloth feed transmission mechanism, that is, it determines the swing amplitude of the cloth feed shaft 370 driven by the lifting shaft 33 through the second cloth feed transmission mechanism to swing back and forth, or in other words, it determines the swing amplitude of the reciprocating motion of the tooth frame 10 and the cloth feed tooth 20, thereby determining the stitch length of the modular sewing machine.

[0117] Furthermore, if Fig.14 and Fig.15 As shown, the seventh embodiment of the flexibly adjustable feeding thread hooking mechanism also includes a stitch length adjustment module 50 independent of the feeding thread hooking module 30, and the stitch length adjustment module 50 includes a stitch length adjustment drive source 51 independent of the feeding thread hooking drive source 31, and the stitch length adjustment drive source 51 is transmission-connected to the cloth feeding swing seat 373, and drives the cloth feeding swing seat 373 to rotate around its fixed swing fulcrum. The stitch length adjustment drive source 51 is a motor, and the motor shaft of the stitch length adjustment drive source 51 is fixedly connected to the cloth feeding swing seat 373, so the stitch length adjustment drive 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 feeding swing seat 373, and correspondingly changing or maintaining the stitch length of the modular sewing machine. The fixed swing fulcrum of the cloth feeding swing seat 373 falls 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.

[0118] Embodiment 8 of the flexibly adjustable feeding and hooking mechanism

[0119] The difference between the eighth embodiment of the flexibly adjustable feeding and hooking mechanism and the seventh embodiment of the flexibly adjustable feeding and hooking mechanism is that the connection form between the lifting and hooking transmission mechanism and the feeding and hooking driving source 31 is different. Fig.17 As shown, the motor shaft of the feed hook line driving 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 feed hook line driving source 31, and the lower shaft 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 second cloth feeding transmission mechanism.

[0120] Embodiment 9 of the flexibly adjustable feeding and hooking mechanism

[0121] The difference between the ninth embodiment of the flexibly adjustable feeding and hooking mechanism and the seventh embodiment of the flexibly adjustable feeding and hooking mechanism is that the connection form between the lifting and hooking transmission mechanism and the feeding and hooking driving source 31 is different. Fig.18 As shown, the motor shaft of the feed hook line driving 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 feed hook line driving source 31, and the intermediate shaft 364 drives the tooth lifting shaft 33 and the lower shaft 34 to rotate through the shaft transmission unit, and the tooth lifting shaft 33 drives the cloth feeding shaft 370 to swing through the second cloth feeding transmission mechanism.

[0122] Embodiment 10 of the flexibly adjustable feeding and hooking mechanism

[0123] The difference between the flexibly adjustable feeding and hooking mechanism embodiment 10 and the flexibly adjustable feeding and hooking mechanism embodiment 7 is that the structure of the lifting and hooking transmission mechanism is different. Fig.19 and Fig. 20 As shown, the tooth-lifting transmission unit includes a second tooth-lifting eccentric wheel 352 fixed at the left end of the tooth-lifting shaft 33, a second tooth-lifting connecting rod 353, a transmission shaft 354 parallel to the tooth-lifting shaft 33 and distributed on the left side of the tooth-lifting shaft 33, a tooth-lifting swing rod 355 fixed at the right end of the transmission shaft 354, a tooth-lifting crank 356 fixed at the left end of the transmission shaft 354, and a third tooth-lifting connecting rod 357. The second tooth-lifting eccentric wheel 352 has a second tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft 33, one end of the second tooth-lifting connecting rod 353 is rotatably mounted on the second tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting swing rod 355, and the two ends of the third tooth-lifting connecting rod 357 are respectively hinged to the tooth-lifting crank 356 and the tooth-lifting connecting portion 101 of the tooth frame 10. The shaft transmission unit eliminates the intermediate shaft 364. In the tenth embodiment of the feeding hook mechanism, as shown in FIG. Fig.19 and Fig.21 As shown, the shaft transmission unit includes a first gear 363 fixed on the tooth-lifting shaft 33, and a third gear 366 fixed on the right end of the lower shaft 34. The right end of the tooth-lifting shaft 33 is fixed to the motor shaft of the feed hook line driving source 31 through a coupling. The tooth-lifting shaft 33 is directly driven to rotate by the feed hook line driving source 31, and the first gear 363 and the third gear 366 are engaged.

[0124] Embodiment 11 of the flexibly adjustable feeding hook mechanism

[0125] The difference between the eleventh embodiment of the flexible adjustable feeding and hooking mechanism and the tenth embodiment of the flexible adjustable feeding and hooking mechanism is 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 eleventh embodiment of the feeding and hooking mechanism, the transmission shaft 354 and the tooth frame 10 are connected as follows: Fig.11 The tooth lifting fork crank 358 and the tooth lifting slider 359 are shown. Therefore, the tooth lifting transmission unit includes a second tooth lifting eccentric wheel 352 fixed to the left end of the tooth lifting shaft 33, a second tooth lifting connecting rod 353, a transmission shaft 354 parallel to the tooth lifting shaft 33 and distributed on the left side of the tooth lifting shaft 33, a tooth lifting swing rod 355 fixed to the right end of the transmission shaft 354, a tooth lifting fork crank 358 fixed to the left end of the transmission shaft 354, and a tooth lifting slider 359. The second tooth lifting eccentric wheel 352 has a second tooth lifting eccentric shaft portion eccentric to the tooth lifting shaft 33. One end of the second tooth-lifting connecting rod 353 is rotatably mounted on the second tooth-lifting eccentric shaft, and the other end is hinged to the tooth-lifting rocker rod 355. A tooth-lifting sliding groove that slides with the tooth-lifting slider 359 is provided in the tooth-lifting fork crank 358. The tooth-lifting slider 359 is hinged to the tooth-lifting connecting part 101 of the tooth rack 10. The reciprocating swing of the tooth-lifting shaft 33 realizes the up and down reciprocating swing of the tooth-lifting fork crank 358, and the tooth rack 10 and the feed dog 20 are driven to reciprocate up and down through the tooth-lifting slider 359.

[0126] In the above-mentioned flexibly adjustable feeding thread hooking mechanism embodiments 7 to 11, the feeding thread hooking mechanism includes an independent feeding thread hooking module 30, and adopts an independent feeding thread hooking drive source 31. The feeding thread hooking module 30 has at least a thread hooking function, a tooth lifting function and a cloth feeding function, and preferably also has a stitch length adjustment function. Based on this, the present application further provides a modular sewing machine with at least two independent functional modules, and the modular sewing machine includes any one of the above-mentioned feeding thread hooking mechanism embodiments 7 to 11, and a cloth picking module 60. For example, Fig. 22 As shown, the modular sewing machine includes the seventh embodiment of the feeding and hooking mechanism and the thorn thread take-up module 60, so the modular sewing machine at least has the feeding and hooking module 30 and the thorn thread take-up module 60, and preferably also has a stitch adjustment module 50. Among them, the thorn thread take-up module 60 includes the above-mentioned thorn 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 rod that can reciprocate up and down, and a thorn thread take-up transmission mechanism. The thorn thread take-up drive source 61 is connected to the needle bar 62 and the thread take-up rod through the thorn thread take-up transmission mechanism to drive the needle bar 62 and the thread take-up rod to move.

[0127] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0128] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A flexible and adjustable feeding thread hooking mechanism, comprising a tooth frame (10) and a feeding tooth (20) mounted on the tooth frame (10), characterized in that: The machine also includes a feeding thread hooking module (30), the feeding thread hooking module (30) including a feeding thread hooking driving source (31), a rotatable rotary hook (32), a tooth lifting connecting portion (101) arranged at one end of the tooth frame (10), and a tooth lifting thread hooking transmission mechanism, the feeding thread hooking driving source (31) is connected to the rotary hook (32) and the tooth lifting connecting portion (101) of the tooth frame (10) through the tooth lifting thread hooking transmission mechanism, and the feeding thread hooking driving source (31) is independent of a driving source in the sewing machine for driving a machine needle (63) to operate; The feeding and thread hooking module (30) further comprises a cloth feeding connection portion (102) arranged at the other end of the tooth frame (10), and a second cloth feeding transmission mechanism, wherein a transmission component in the tooth lifting and thread hooking transmission mechanism is connected to the cloth feeding connection portion (102) of the tooth frame (10) via the second cloth feeding transmission mechanism; The tooth-lifting and thread-hooking transmission mechanism comprises a tooth-lifting shaft (33) and a lower shaft (34) both rotatably supported in a sewing machine housing, a shaft transmission unit connected between the tooth-lifting shaft (33) and the lower shaft (34), and a tooth-lifting transmission unit connected between the tooth-lifting shaft (33) and a tooth-lifting connection portion (101) of a tooth frame (10); the tooth-lifting shaft (33) or the lower shaft (34) is in transmission connection with a feed thread-hooking driving source (31) and is driven to rotate by the feed thread-hooking driving source (31); the shaft transmission unit makes the rotation speed ratio of the lower shaft (34) and the tooth-lifting shaft (33) be 2:1; the rotary shuttle (32) is fixed to the end of the lower shaft (34); and the feed thread-hooking driving source (31) is a motor.

2. The feeding and hooking mechanism according to claim 1, characterized in that: The invention also comprises a cloth feeding module (40) which is independent of the cloth feeding and hooking module (30), the cloth feeding module (40) comprising a cloth feeding drive source (41), a cloth feeding connection part (102) arranged at the other end of the tooth frame (10), and a first cloth feeding transmission mechanism, the cloth feeding drive source (41) is connected to the cloth feeding connection part (102) of the tooth frame (10) via the first cloth feeding transmission mechanism, and the cloth feeding and hooking drive source (31) and the cloth feeding drive source (41) are independent of each other.

3. The feeding and hooking mechanism according to claim 1 is characterized in that: The tooth-lifting transmission unit comprises a first tooth-lifting eccentric wheel (350) fixed to a tooth-lifting shaft (33), and a first tooth-lifting connecting rod (351); the first tooth-lifting eccentric wheel (350) has a first tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft (33); one end of the first tooth-lifting connecting rod (351) is rotatably mounted on the first tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting connecting portion (101) of the tooth frame (10).

4. The feeding and hooking mechanism according to claim 1 is characterized in that: The tooth-lifting transmission unit comprises a second tooth-lifting eccentric wheel (352) fixed to the tooth-lifting shaft (33), a second tooth-lifting connecting rod (353), a transmission shaft (354) parallel to the tooth-lifting shaft (33), a tooth-lifting swing rod (355) fixed to one end of the transmission shaft (354), a tooth-lifting crank (356) fixed to the other end of the transmission shaft (354), and a third tooth-lifting connecting rod (357), wherein the second tooth-lifting eccentric wheel (352) has a second tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft (33), one end of the second tooth-lifting connecting rod (353) is rotatably mounted on the second tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting swing rod (355), and the two ends of the third tooth-lifting connecting rod (357) are respectively hinged to the tooth-lifting crank (356) and the tooth-lifting connecting portion (101) of the tooth frame (10).

5. The feeding and hooking mechanism according to claim 1 is characterized in that: The tooth-lifting transmission unit comprises a second tooth-lifting eccentric wheel (352) fixed to the tooth-lifting shaft (33), a second tooth-lifting connecting rod (353), a transmission shaft (354) parallel to the tooth-lifting shaft (33), a tooth-lifting swing rod (355) fixed to one end of the transmission shaft (354), a tooth-lifting fork crank (358) fixed to the other end of the transmission shaft (354), and a tooth-lifting slider (359), wherein the second tooth-lifting eccentric wheel (352) has a second tooth-lifting eccentric shaft portion eccentric to the tooth-lifting shaft (33), one end of the second tooth-lifting connecting rod (353) is rotatably mounted on the second tooth-lifting eccentric shaft portion, and the other end is hinged to the tooth-lifting swing rod (355), a tooth-lifting sliding groove slidably matched with the tooth-lifting slider (359) is provided in the tooth-lifting fork crank (358), and the tooth-lifting slider (359) is hinged to the tooth-lifting connecting portion (101) of the tooth frame (10).

6. The feeding and hooking mechanism according to claim 1 is characterized in that: The shaft transmission unit comprises a first pulley (360) fixed on the lower shaft (34), a second pulley (361) fixed on the tooth lifting shaft (33), and a transmission belt (362) connecting the first pulley (360) and the second pulley (361).

7. The feeding and hooking mechanism according to claim 1 is characterized in that: The shaft transmission unit comprises a first gear (363) fixed on the tooth-lifting shaft (33), an intermediate shaft (364) rotatably supported in a sewing machine housing, a second gear (365) fixed on the intermediate shaft (364), and a third gear (366) fixed on the lower shaft (34); one of the tooth-lifting shaft (33), the lower shaft (34) and the intermediate shaft (364) is transmission-connected to a feed thread hook driving source (31) and driven to rotate by the feed thread hook driving source (31); the first gear (363) is meshed with the second gear (365), and the second gear (365) is meshed with the third gear (366).

8. The feeding and hooking mechanism according to claim 1, characterized in that: The shaft transmission unit comprises a first gear (363) fixed on the tooth-lifting shaft (33), and a third gear (366) fixed on the lower shaft (34); the tooth-lifting shaft (33) or the lower shaft (34) is in transmission connection with a feed hook driving source (31) and is driven to rotate by the feed hook driving source (31); the first gear (363) is meshed with the third gear (366).

9. The feeding and hooking mechanism according to claim 1, characterized in that: The tooth lifting and thread hooking transmission mechanism comprises a tooth lifting shaft (33) rotatably supported in a sewing machine housing, and the second cloth feeding transmission mechanism comprises a cloth feeding shaft (370) parallel to the tooth lifting shaft (33), a cloth feeding eccentric wheel (371) fixed on the tooth lifting shaft (33), a first cloth feeding connecting rod (372), a cloth feeding swing seat (373) having a fixed swing fulcrum, a first cloth feeding swing rod (374), a second cloth feeding swing rod (375), and a first cloth feeding crank (376) and a tooth frame seat (42) all fixed to the cloth feeding shaft (370). One end of the first cloth feeding connecting rod (372) is rotatably mounted on the cloth feeding eccentric wheel (371); the other end of the first cloth feeding connecting rod (372), one end of the first cloth feeding rocker (374), and one end of the second cloth feeding rocker (375) are coaxially hinged; the other end of the first cloth feeding rocker (374) is hinged to the cloth feeding swing seat (373); the other end of the second cloth feeding rocker (375) is hinged to the first cloth feeding crank (376); and the tooth frame seat (42) is hinged to the cloth feeding connecting portion (102) of the tooth frame (10).

10. The feeding and hooking mechanism according to claim 9, characterized in that: It also includes a needle distance adjustment module (50) that is independent of the material feeding and thread hooking module (30), and the needle distance adjustment module (50) includes a needle distance adjustment drive source (51) that is independent of the material feeding and thread hooking drive source (31), and the needle distance adjustment drive source (51) is transmission-connected to the cloth feeding swing seat (373) and drives the cloth feeding swing seat (373) to rotate around its fixed swing fulcrum.

11. A sewing machine, characterized in that: The sewing machine is provided with the feeding and thread hooking mechanism described in any one of claims 1 to 10.

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